1/*
2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright 2005 Nokia. All rights reserved.
4 *
5 * Licensed under the OpenSSL license (the "License").  You may not use
6 * this file except in compliance with the License.  You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11#include "e_os.h"
12#include <ctype.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <errno.h>
17#include <openssl/e_os2.h>
18
19#ifndef OPENSSL_NO_SOCK
20
21/*
22 * With IPv6, it looks like Digital has mixed up the proper order of
23 * recursive header file inclusion, resulting in the compiler complaining
24 * that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
25 * needed to have fileno() declared correctly...  So let's define u_int
26 */
27#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
28# define __U_INT
29typedef unsigned int u_int;
30#endif
31
32#include "apps.h"
33#include "progs.h"
34#include <openssl/x509.h>
35#include <openssl/ssl.h>
36#include <openssl/err.h>
37#include <openssl/pem.h>
38#include <openssl/rand.h>
39#include <openssl/ocsp.h>
40#include <openssl/bn.h>
41#include <openssl/async.h>
42#ifndef OPENSSL_NO_SRP
43# include <openssl/srp.h>
44#endif
45#ifndef OPENSSL_NO_CT
46# include <openssl/ct.h>
47#endif
48#include "s_apps.h"
49#include "timeouts.h"
50#include "internal/sockets.h"
51
52#if defined(__has_feature)
53# if __has_feature(memory_sanitizer)
54#  include <sanitizer/msan_interface.h>
55# endif
56#endif
57
58#undef BUFSIZZ
59#define BUFSIZZ 1024*8
60#define S_CLIENT_IRC_READ_TIMEOUT 8
61
62static char *prog;
63static int c_debug = 0;
64static int c_showcerts = 0;
65static char *keymatexportlabel = NULL;
66static int keymatexportlen = 20;
67static BIO *bio_c_out = NULL;
68static int c_quiet = 0;
69static char *sess_out = NULL;
70static SSL_SESSION *psksess = NULL;
71
72static void print_stuff(BIO *berr, SSL *con, int full);
73#ifndef OPENSSL_NO_OCSP
74static int ocsp_resp_cb(SSL *s, void *arg);
75#endif
76static int ldap_ExtendedResponse_parse(const char *buf, long rem);
77static int is_dNS_name(const char *host);
78
79static int saved_errno;
80
81static void save_errno(void)
82{
83    saved_errno = errno;
84    errno = 0;
85}
86
87static int restore_errno(void)
88{
89    int ret = errno;
90    errno = saved_errno;
91    return ret;
92}
93
94static void do_ssl_shutdown(SSL *ssl)
95{
96    int ret;
97
98    do {
99        /* We only do unidirectional shutdown */
100        ret = SSL_shutdown(ssl);
101        if (ret < 0) {
102            switch (SSL_get_error(ssl, ret)) {
103            case SSL_ERROR_WANT_READ:
104            case SSL_ERROR_WANT_WRITE:
105            case SSL_ERROR_WANT_ASYNC:
106            case SSL_ERROR_WANT_ASYNC_JOB:
107                /* We just do busy waiting. Nothing clever */
108                continue;
109            }
110            ret = 0;
111        }
112    } while (ret < 0);
113}
114
115/* Default PSK identity and key */
116static char *psk_identity = "Client_identity";
117
118#ifndef OPENSSL_NO_PSK
119static unsigned int psk_client_cb(SSL *ssl, const char *hint, char *identity,
120                                  unsigned int max_identity_len,
121                                  unsigned char *psk,
122                                  unsigned int max_psk_len)
123{
124    int ret;
125    long key_len;
126    unsigned char *key;
127
128    if (c_debug)
129        BIO_printf(bio_c_out, "psk_client_cb\n");
130    if (!hint) {
131        /* no ServerKeyExchange message */
132        if (c_debug)
133            BIO_printf(bio_c_out,
134                       "NULL received PSK identity hint, continuing anyway\n");
135    } else if (c_debug) {
136        BIO_printf(bio_c_out, "Received PSK identity hint '%s'\n", hint);
137    }
138
139    /*
140     * lookup PSK identity and PSK key based on the given identity hint here
141     */
142    ret = BIO_snprintf(identity, max_identity_len, "%s", psk_identity);
143    if (ret < 0 || (unsigned int)ret > max_identity_len)
144        goto out_err;
145    if (c_debug)
146        BIO_printf(bio_c_out, "created identity '%s' len=%d\n", identity,
147                   ret);
148
149    /* convert the PSK key to binary */
150    key = OPENSSL_hexstr2buf(psk_key, &key_len);
151    if (key == NULL) {
152        BIO_printf(bio_err, "Could not convert PSK key '%s' to buffer\n",
153                   psk_key);
154        return 0;
155    }
156    if (max_psk_len > INT_MAX || key_len > (long)max_psk_len) {
157        BIO_printf(bio_err,
158                   "psk buffer of callback is too small (%d) for key (%ld)\n",
159                   max_psk_len, key_len);
160        OPENSSL_free(key);
161        return 0;
162    }
163
164    memcpy(psk, key, key_len);
165    OPENSSL_free(key);
166
167    if (c_debug)
168        BIO_printf(bio_c_out, "created PSK len=%ld\n", key_len);
169
170    return key_len;
171 out_err:
172    if (c_debug)
173        BIO_printf(bio_err, "Error in PSK client callback\n");
174    return 0;
175}
176#endif
177
178const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 };
179const unsigned char tls13_aes256gcmsha384_id[] = { 0x13, 0x02 };
180
181static int psk_use_session_cb(SSL *s, const EVP_MD *md,
182                              const unsigned char **id, size_t *idlen,
183                              SSL_SESSION **sess)
184{
185    SSL_SESSION *usesess = NULL;
186    const SSL_CIPHER *cipher = NULL;
187
188    if (psksess != NULL) {
189        SSL_SESSION_up_ref(psksess);
190        usesess = psksess;
191    } else {
192        long key_len;
193        unsigned char *key = OPENSSL_hexstr2buf(psk_key, &key_len);
194
195        if (key == NULL) {
196            BIO_printf(bio_err, "Could not convert PSK key '%s' to buffer\n",
197                       psk_key);
198            return 0;
199        }
200
201        /* We default to SHA-256 */
202        cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id);
203        if (cipher == NULL) {
204            BIO_printf(bio_err, "Error finding suitable ciphersuite\n");
205            OPENSSL_free(key);
206            return 0;
207        }
208
209        usesess = SSL_SESSION_new();
210        if (usesess == NULL
211                || !SSL_SESSION_set1_master_key(usesess, key, key_len)
212                || !SSL_SESSION_set_cipher(usesess, cipher)
213                || !SSL_SESSION_set_protocol_version(usesess, TLS1_3_VERSION)) {
214            OPENSSL_free(key);
215            goto err;
216        }
217        OPENSSL_free(key);
218    }
219
220    cipher = SSL_SESSION_get0_cipher(usesess);
221    if (cipher == NULL)
222        goto err;
223
224    if (md != NULL && SSL_CIPHER_get_handshake_digest(cipher) != md) {
225        /* PSK not usable, ignore it */
226        *id = NULL;
227        *idlen = 0;
228        *sess = NULL;
229        SSL_SESSION_free(usesess);
230    } else {
231        *sess = usesess;
232        *id = (unsigned char *)psk_identity;
233        *idlen = strlen(psk_identity);
234    }
235
236    return 1;
237
238 err:
239    SSL_SESSION_free(usesess);
240    return 0;
241}
242
243/* This is a context that we pass to callbacks */
244typedef struct tlsextctx_st {
245    BIO *biodebug;
246    int ack;
247} tlsextctx;
248
249static int ssl_servername_cb(SSL *s, int *ad, void *arg)
250{
251    tlsextctx *p = (tlsextctx *) arg;
252    const char *hn = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
253    if (SSL_get_servername_type(s) != -1)
254        p->ack = !SSL_session_reused(s) && hn != NULL;
255    else
256        BIO_printf(bio_err, "Can't use SSL_get_servername\n");
257
258    return SSL_TLSEXT_ERR_OK;
259}
260
261#ifndef OPENSSL_NO_SRP
262
263/* This is a context that we pass to all callbacks */
264typedef struct srp_arg_st {
265    char *srppassin;
266    char *srplogin;
267    int msg;                    /* copy from c_msg */
268    int debug;                  /* copy from c_debug */
269    int amp;                    /* allow more groups */
270    int strength;               /* minimal size for N */
271} SRP_ARG;
272
273# define SRP_NUMBER_ITERATIONS_FOR_PRIME 64
274
275static int srp_Verify_N_and_g(const BIGNUM *N, const BIGNUM *g)
276{
277    BN_CTX *bn_ctx = BN_CTX_new();
278    BIGNUM *p = BN_new();
279    BIGNUM *r = BN_new();
280    int ret =
281        g != NULL && N != NULL && bn_ctx != NULL && BN_is_odd(N) &&
282        BN_is_prime_ex(N, SRP_NUMBER_ITERATIONS_FOR_PRIME, bn_ctx, NULL) == 1 &&
283        p != NULL && BN_rshift1(p, N) &&
284        /* p = (N-1)/2 */
285        BN_is_prime_ex(p, SRP_NUMBER_ITERATIONS_FOR_PRIME, bn_ctx, NULL) == 1 &&
286        r != NULL &&
287        /* verify g^((N-1)/2) == -1 (mod N) */
288        BN_mod_exp(r, g, p, N, bn_ctx) &&
289        BN_add_word(r, 1) && BN_cmp(r, N) == 0;
290
291    BN_free(r);
292    BN_free(p);
293    BN_CTX_free(bn_ctx);
294    return ret;
295}
296
297/*-
298 * This callback is used here for two purposes:
299 * - extended debugging
300 * - making some primality tests for unknown groups
301 * The callback is only called for a non default group.
302 *
303 * An application does not need the call back at all if
304 * only the standard groups are used.  In real life situations,
305 * client and server already share well known groups,
306 * thus there is no need to verify them.
307 * Furthermore, in case that a server actually proposes a group that
308 * is not one of those defined in RFC 5054, it is more appropriate
309 * to add the group to a static list and then compare since
310 * primality tests are rather cpu consuming.
311 */
312
313static int ssl_srp_verify_param_cb(SSL *s, void *arg)
314{
315    SRP_ARG *srp_arg = (SRP_ARG *)arg;
316    BIGNUM *N = NULL, *g = NULL;
317
318    if (((N = SSL_get_srp_N(s)) == NULL) || ((g = SSL_get_srp_g(s)) == NULL))
319        return 0;
320    if (srp_arg->debug || srp_arg->msg || srp_arg->amp == 1) {
321        BIO_printf(bio_err, "SRP parameters:\n");
322        BIO_printf(bio_err, "\tN=");
323        BN_print(bio_err, N);
324        BIO_printf(bio_err, "\n\tg=");
325        BN_print(bio_err, g);
326        BIO_printf(bio_err, "\n");
327    }
328
329    if (SRP_check_known_gN_param(g, N))
330        return 1;
331
332    if (srp_arg->amp == 1) {
333        if (srp_arg->debug)
334            BIO_printf(bio_err,
335                       "SRP param N and g are not known params, going to check deeper.\n");
336
337        /*
338         * The srp_moregroups is a real debugging feature. Implementors
339         * should rather add the value to the known ones. The minimal size
340         * has already been tested.
341         */
342        if (BN_num_bits(g) <= BN_BITS && srp_Verify_N_and_g(N, g))
343            return 1;
344    }
345    BIO_printf(bio_err, "SRP param N and g rejected.\n");
346    return 0;
347}
348
349# define PWD_STRLEN 1024
350
351static char *ssl_give_srp_client_pwd_cb(SSL *s, void *arg)
352{
353    SRP_ARG *srp_arg = (SRP_ARG *)arg;
354    char *pass = app_malloc(PWD_STRLEN + 1, "SRP password buffer");
355    PW_CB_DATA cb_tmp;
356    int l;
357
358    cb_tmp.password = (char *)srp_arg->srppassin;
359    cb_tmp.prompt_info = "SRP user";
360    if ((l = password_callback(pass, PWD_STRLEN, 0, &cb_tmp)) < 0) {
361        BIO_printf(bio_err, "Can't read Password\n");
362        OPENSSL_free(pass);
363        return NULL;
364    }
365    *(pass + l) = '\0';
366
367    return pass;
368}
369
370#endif
371
372#ifndef OPENSSL_NO_NEXTPROTONEG
373/* This the context that we pass to next_proto_cb */
374typedef struct tlsextnextprotoctx_st {
375    unsigned char *data;
376    size_t len;
377    int status;
378} tlsextnextprotoctx;
379
380static tlsextnextprotoctx next_proto;
381
382static int next_proto_cb(SSL *s, unsigned char **out, unsigned char *outlen,
383                         const unsigned char *in, unsigned int inlen,
384                         void *arg)
385{
386    tlsextnextprotoctx *ctx = arg;
387
388    if (!c_quiet) {
389        /* We can assume that |in| is syntactically valid. */
390        unsigned i;
391        BIO_printf(bio_c_out, "Protocols advertised by server: ");
392        for (i = 0; i < inlen;) {
393            if (i)
394                BIO_write(bio_c_out, ", ", 2);
395            BIO_write(bio_c_out, &in[i + 1], in[i]);
396            i += in[i] + 1;
397        }
398        BIO_write(bio_c_out, "\n", 1);
399    }
400
401    ctx->status =
402        SSL_select_next_proto(out, outlen, in, inlen, ctx->data, ctx->len);
403    return SSL_TLSEXT_ERR_OK;
404}
405#endif                         /* ndef OPENSSL_NO_NEXTPROTONEG */
406
407static int serverinfo_cli_parse_cb(SSL *s, unsigned int ext_type,
408                                   const unsigned char *in, size_t inlen,
409                                   int *al, void *arg)
410{
411    char pem_name[100];
412    unsigned char ext_buf[4 + 65536];
413
414    /* Reconstruct the type/len fields prior to extension data */
415    inlen &= 0xffff; /* for formal memcmpy correctness */
416    ext_buf[0] = (unsigned char)(ext_type >> 8);
417    ext_buf[1] = (unsigned char)(ext_type);
418    ext_buf[2] = (unsigned char)(inlen >> 8);
419    ext_buf[3] = (unsigned char)(inlen);
420    memcpy(ext_buf + 4, in, inlen);
421
422    BIO_snprintf(pem_name, sizeof(pem_name), "SERVERINFO FOR EXTENSION %d",
423                 ext_type);
424    PEM_write_bio(bio_c_out, pem_name, "", ext_buf, 4 + inlen);
425    return 1;
426}
427
428/*
429 * Hex decoder that tolerates optional whitespace.  Returns number of bytes
430 * produced, advances inptr to end of input string.
431 */
432static ossl_ssize_t hexdecode(const char **inptr, void *result)
433{
434    unsigned char **out = (unsigned char **)result;
435    const char *in = *inptr;
436    unsigned char *ret = app_malloc(strlen(in) / 2, "hexdecode");
437    unsigned char *cp = ret;
438    uint8_t byte;
439    int nibble = 0;
440
441    if (ret == NULL)
442        return -1;
443
444    for (byte = 0; *in; ++in) {
445        int x;
446
447        if (isspace(_UC(*in)))
448            continue;
449        x = OPENSSL_hexchar2int(*in);
450        if (x < 0) {
451            OPENSSL_free(ret);
452            return 0;
453        }
454        byte |= (char)x;
455        if ((nibble ^= 1) == 0) {
456            *cp++ = byte;
457            byte = 0;
458        } else {
459            byte <<= 4;
460        }
461    }
462    if (nibble != 0) {
463        OPENSSL_free(ret);
464        return 0;
465    }
466    *inptr = in;
467
468    return cp - (*out = ret);
469}
470
471/*
472 * Decode unsigned 0..255, returns 1 on success, <= 0 on failure. Advances
473 * inptr to next field skipping leading whitespace.
474 */
475static ossl_ssize_t checked_uint8(const char **inptr, void *out)
476{
477    uint8_t *result = (uint8_t *)out;
478    const char *in = *inptr;
479    char *endp;
480    long v;
481    int e;
482
483    save_errno();
484    v = strtol(in, &endp, 10);
485    e = restore_errno();
486
487    if (((v == LONG_MIN || v == LONG_MAX) && e == ERANGE) ||
488        endp == in || !isspace(_UC(*endp)) ||
489        v != (*result = (uint8_t) v)) {
490        return -1;
491    }
492    for (in = endp; isspace(_UC(*in)); ++in)
493        continue;
494
495    *inptr = in;
496    return 1;
497}
498
499struct tlsa_field {
500    void *var;
501    const char *name;
502    ossl_ssize_t (*parser)(const char **, void *);
503};
504
505static int tlsa_import_rr(SSL *con, const char *rrdata)
506{
507    /* Not necessary to re-init these values; the "parsers" do that. */
508    static uint8_t usage;
509    static uint8_t selector;
510    static uint8_t mtype;
511    static unsigned char *data;
512    static struct tlsa_field tlsa_fields[] = {
513        { &usage, "usage", checked_uint8 },
514        { &selector, "selector", checked_uint8 },
515        { &mtype, "mtype", checked_uint8 },
516        { &data, "data", hexdecode },
517        { NULL, }
518    };
519    struct tlsa_field *f;
520    int ret;
521    const char *cp = rrdata;
522    ossl_ssize_t len = 0;
523
524    for (f = tlsa_fields; f->var; ++f) {
525        /* Returns number of bytes produced, advances cp to next field */
526        if ((len = f->parser(&cp, f->var)) <= 0) {
527            BIO_printf(bio_err, "%s: warning: bad TLSA %s field in: %s\n",
528                       prog, f->name, rrdata);
529            return 0;
530        }
531    }
532    /* The data field is last, so len is its length */
533    ret = SSL_dane_tlsa_add(con, usage, selector, mtype, data, len);
534    OPENSSL_free(data);
535
536    if (ret == 0) {
537        ERR_print_errors(bio_err);
538        BIO_printf(bio_err, "%s: warning: unusable TLSA rrdata: %s\n",
539                   prog, rrdata);
540        return 0;
541    }
542    if (ret < 0) {
543        ERR_print_errors(bio_err);
544        BIO_printf(bio_err, "%s: warning: error loading TLSA rrdata: %s\n",
545                   prog, rrdata);
546        return 0;
547    }
548    return ret;
549}
550
551static int tlsa_import_rrset(SSL *con, STACK_OF(OPENSSL_STRING) *rrset)
552{
553    int num = sk_OPENSSL_STRING_num(rrset);
554    int count = 0;
555    int i;
556
557    for (i = 0; i < num; ++i) {
558        char *rrdata = sk_OPENSSL_STRING_value(rrset, i);
559        if (tlsa_import_rr(con, rrdata) > 0)
560            ++count;
561    }
562    return count > 0;
563}
564
565typedef enum OPTION_choice {
566    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
567    OPT_4, OPT_6, OPT_HOST, OPT_PORT, OPT_CONNECT, OPT_BIND, OPT_UNIX,
568    OPT_XMPPHOST, OPT_VERIFY, OPT_NAMEOPT,
569    OPT_CERT, OPT_CRL, OPT_CRL_DOWNLOAD, OPT_SESS_OUT, OPT_SESS_IN,
570    OPT_CERTFORM, OPT_CRLFORM, OPT_VERIFY_RET_ERROR, OPT_VERIFY_QUIET,
571    OPT_BRIEF, OPT_PREXIT, OPT_CRLF, OPT_QUIET, OPT_NBIO,
572    OPT_SSL_CLIENT_ENGINE, OPT_IGN_EOF, OPT_NO_IGN_EOF,
573    OPT_DEBUG, OPT_TLSEXTDEBUG, OPT_STATUS, OPT_WDEBUG,
574    OPT_MSG, OPT_MSGFILE, OPT_ENGINE, OPT_TRACE, OPT_SECURITY_DEBUG,
575    OPT_SECURITY_DEBUG_VERBOSE, OPT_SHOWCERTS, OPT_NBIO_TEST, OPT_STATE,
576    OPT_PSK_IDENTITY, OPT_PSK, OPT_PSK_SESS,
577#ifndef OPENSSL_NO_SRP
578    OPT_SRPUSER, OPT_SRPPASS, OPT_SRP_STRENGTH, OPT_SRP_LATEUSER,
579    OPT_SRP_MOREGROUPS,
580#endif
581    OPT_SSL3, OPT_SSL_CONFIG,
582    OPT_TLS1_3, OPT_TLS1_2, OPT_TLS1_1, OPT_TLS1, OPT_DTLS, OPT_DTLS1,
583    OPT_DTLS1_2, OPT_SCTP, OPT_TIMEOUT, OPT_MTU, OPT_KEYFORM, OPT_PASS,
584    OPT_CERT_CHAIN, OPT_CAPATH, OPT_NOCAPATH, OPT_CHAINCAPATH, OPT_VERIFYCAPATH,
585    OPT_KEY, OPT_RECONNECT, OPT_BUILD_CHAIN, OPT_CAFILE, OPT_NOCAFILE,
586    OPT_CHAINCAFILE, OPT_VERIFYCAFILE, OPT_NEXTPROTONEG, OPT_ALPN,
587    OPT_SERVERINFO, OPT_STARTTLS, OPT_SERVERNAME, OPT_NOSERVERNAME, OPT_ASYNC,
588    OPT_USE_SRTP, OPT_KEYMATEXPORT, OPT_KEYMATEXPORTLEN, OPT_PROTOHOST,
589    OPT_MAXFRAGLEN, OPT_MAX_SEND_FRAG, OPT_SPLIT_SEND_FRAG, OPT_MAX_PIPELINES,
590    OPT_READ_BUF, OPT_KEYLOG_FILE, OPT_EARLY_DATA, OPT_REQCAFILE,
591    OPT_V_ENUM,
592    OPT_X_ENUM,
593    OPT_S_ENUM,
594    OPT_FALLBACKSCSV, OPT_NOCMDS, OPT_PROXY, OPT_DANE_TLSA_DOMAIN,
595#ifndef OPENSSL_NO_CT
596    OPT_CT, OPT_NOCT, OPT_CTLOG_FILE,
597#endif
598    OPT_DANE_TLSA_RRDATA, OPT_DANE_EE_NO_NAME,
599    OPT_ENABLE_PHA,
600    OPT_SCTP_LABEL_BUG,
601    OPT_R_ENUM
602} OPTION_CHOICE;
603
604const OPTIONS s_client_options[] = {
605    {"help", OPT_HELP, '-', "Display this summary"},
606    {"host", OPT_HOST, 's', "Use -connect instead"},
607    {"port", OPT_PORT, 'p', "Use -connect instead"},
608    {"connect", OPT_CONNECT, 's',
609     "TCP/IP where to connect (default is :" PORT ")"},
610    {"bind", OPT_BIND, 's', "bind local address for connection"},
611    {"proxy", OPT_PROXY, 's',
612     "Connect to via specified proxy to the real server"},
613#ifdef AF_UNIX
614    {"unix", OPT_UNIX, 's', "Connect over the specified Unix-domain socket"},
615#endif
616    {"4", OPT_4, '-', "Use IPv4 only"},
617#ifdef AF_INET6
618    {"6", OPT_6, '-', "Use IPv6 only"},
619#endif
620    {"verify", OPT_VERIFY, 'p', "Turn on peer certificate verification"},
621    {"cert", OPT_CERT, '<', "Certificate file to use, PEM format assumed"},
622    {"certform", OPT_CERTFORM, 'F',
623     "Certificate format (PEM or DER) PEM default"},
624    {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
625    {"key", OPT_KEY, 's', "Private key file to use, if not in -cert file"},
626    {"keyform", OPT_KEYFORM, 'E', "Key format (PEM, DER or engine) PEM default"},
627    {"pass", OPT_PASS, 's', "Private key file pass phrase source"},
628    {"CApath", OPT_CAPATH, '/', "PEM format directory of CA's"},
629    {"CAfile", OPT_CAFILE, '<', "PEM format file of CA's"},
630    {"no-CAfile", OPT_NOCAFILE, '-',
631     "Do not load the default certificates file"},
632    {"no-CApath", OPT_NOCAPATH, '-',
633     "Do not load certificates from the default certificates directory"},
634    {"requestCAfile", OPT_REQCAFILE, '<',
635      "PEM format file of CA names to send to the server"},
636    {"dane_tlsa_domain", OPT_DANE_TLSA_DOMAIN, 's', "DANE TLSA base domain"},
637    {"dane_tlsa_rrdata", OPT_DANE_TLSA_RRDATA, 's',
638     "DANE TLSA rrdata presentation form"},
639    {"dane_ee_no_namechecks", OPT_DANE_EE_NO_NAME, '-',
640     "Disable name checks when matching DANE-EE(3) TLSA records"},
641    {"reconnect", OPT_RECONNECT, '-',
642     "Drop and re-make the connection with the same Session-ID"},
643    {"showcerts", OPT_SHOWCERTS, '-',
644     "Show all certificates sent by the server"},
645    {"debug", OPT_DEBUG, '-', "Extra output"},
646    {"msg", OPT_MSG, '-', "Show protocol messages"},
647    {"msgfile", OPT_MSGFILE, '>',
648     "File to send output of -msg or -trace, instead of stdout"},
649    {"nbio_test", OPT_NBIO_TEST, '-', "More ssl protocol testing"},
650    {"state", OPT_STATE, '-', "Print the ssl states"},
651    {"crlf", OPT_CRLF, '-', "Convert LF from terminal into CRLF"},
652    {"quiet", OPT_QUIET, '-', "No s_client output"},
653    {"ign_eof", OPT_IGN_EOF, '-', "Ignore input eof (default when -quiet)"},
654    {"no_ign_eof", OPT_NO_IGN_EOF, '-', "Don't ignore input eof"},
655    {"starttls", OPT_STARTTLS, 's',
656     "Use the appropriate STARTTLS command before starting TLS"},
657    {"xmpphost", OPT_XMPPHOST, 's',
658     "Alias of -name option for \"-starttls xmpp[-server]\""},
659    OPT_R_OPTIONS,
660    {"sess_out", OPT_SESS_OUT, '>', "File to write SSL session to"},
661    {"sess_in", OPT_SESS_IN, '<', "File to read SSL session from"},
662#ifndef OPENSSL_NO_SRTP
663    {"use_srtp", OPT_USE_SRTP, 's',
664     "Offer SRTP key management with a colon-separated profile list"},
665#endif
666    {"keymatexport", OPT_KEYMATEXPORT, 's',
667     "Export keying material using label"},
668    {"keymatexportlen", OPT_KEYMATEXPORTLEN, 'p',
669     "Export len bytes of keying material (default 20)"},
670    {"maxfraglen", OPT_MAXFRAGLEN, 'p',
671     "Enable Maximum Fragment Length Negotiation (len values: 512, 1024, 2048 and 4096)"},
672    {"fallback_scsv", OPT_FALLBACKSCSV, '-', "Send the fallback SCSV"},
673    {"name", OPT_PROTOHOST, 's',
674     "Hostname to use for \"-starttls lmtp\", \"-starttls smtp\" or \"-starttls xmpp[-server]\""},
675    {"CRL", OPT_CRL, '<', "CRL file to use"},
676    {"crl_download", OPT_CRL_DOWNLOAD, '-', "Download CRL from distribution points"},
677    {"CRLform", OPT_CRLFORM, 'F', "CRL format (PEM or DER) PEM is default"},
678    {"verify_return_error", OPT_VERIFY_RET_ERROR, '-',
679     "Close connection on verification error"},
680    {"verify_quiet", OPT_VERIFY_QUIET, '-', "Restrict verify output to errors"},
681    {"brief", OPT_BRIEF, '-',
682     "Restrict output to brief summary of connection parameters"},
683    {"prexit", OPT_PREXIT, '-',
684     "Print session information when the program exits"},
685    {"security_debug", OPT_SECURITY_DEBUG, '-',
686     "Enable security debug messages"},
687    {"security_debug_verbose", OPT_SECURITY_DEBUG_VERBOSE, '-',
688     "Output more security debug output"},
689    {"cert_chain", OPT_CERT_CHAIN, '<',
690     "Certificate chain file (in PEM format)"},
691    {"chainCApath", OPT_CHAINCAPATH, '/',
692     "Use dir as certificate store path to build CA certificate chain"},
693    {"verifyCApath", OPT_VERIFYCAPATH, '/',
694     "Use dir as certificate store path to verify CA certificate"},
695    {"build_chain", OPT_BUILD_CHAIN, '-', "Build certificate chain"},
696    {"chainCAfile", OPT_CHAINCAFILE, '<',
697     "CA file for certificate chain (PEM format)"},
698    {"verifyCAfile", OPT_VERIFYCAFILE, '<',
699     "CA file for certificate verification (PEM format)"},
700    {"nocommands", OPT_NOCMDS, '-', "Do not use interactive command letters"},
701    {"servername", OPT_SERVERNAME, 's',
702     "Set TLS extension servername (SNI) in ClientHello (default)"},
703    {"noservername", OPT_NOSERVERNAME, '-',
704     "Do not send the server name (SNI) extension in the ClientHello"},
705    {"tlsextdebug", OPT_TLSEXTDEBUG, '-',
706     "Hex dump of all TLS extensions received"},
707#ifndef OPENSSL_NO_OCSP
708    {"status", OPT_STATUS, '-', "Request certificate status from server"},
709#endif
710    {"serverinfo", OPT_SERVERINFO, 's',
711     "types  Send empty ClientHello extensions (comma-separated numbers)"},
712    {"alpn", OPT_ALPN, 's',
713     "Enable ALPN extension, considering named protocols supported (comma-separated list)"},
714    {"async", OPT_ASYNC, '-', "Support asynchronous operation"},
715    {"ssl_config", OPT_SSL_CONFIG, 's', "Use specified configuration file"},
716    {"max_send_frag", OPT_MAX_SEND_FRAG, 'p', "Maximum Size of send frames "},
717    {"split_send_frag", OPT_SPLIT_SEND_FRAG, 'p',
718     "Size used to split data for encrypt pipelines"},
719    {"max_pipelines", OPT_MAX_PIPELINES, 'p',
720     "Maximum number of encrypt/decrypt pipelines to be used"},
721    {"read_buf", OPT_READ_BUF, 'p',
722     "Default read buffer size to be used for connections"},
723    OPT_S_OPTIONS,
724    OPT_V_OPTIONS,
725    OPT_X_OPTIONS,
726#ifndef OPENSSL_NO_SSL3
727    {"ssl3", OPT_SSL3, '-', "Just use SSLv3"},
728#endif
729#ifndef OPENSSL_NO_TLS1
730    {"tls1", OPT_TLS1, '-', "Just use TLSv1"},
731#endif
732#ifndef OPENSSL_NO_TLS1_1
733    {"tls1_1", OPT_TLS1_1, '-', "Just use TLSv1.1"},
734#endif
735#ifndef OPENSSL_NO_TLS1_2
736    {"tls1_2", OPT_TLS1_2, '-', "Just use TLSv1.2"},
737#endif
738#ifndef OPENSSL_NO_TLS1_3
739    {"tls1_3", OPT_TLS1_3, '-', "Just use TLSv1.3"},
740#endif
741#ifndef OPENSSL_NO_DTLS
742    {"dtls", OPT_DTLS, '-', "Use any version of DTLS"},
743    {"timeout", OPT_TIMEOUT, '-',
744     "Enable send/receive timeout on DTLS connections"},
745    {"mtu", OPT_MTU, 'p', "Set the link layer MTU"},
746#endif
747#ifndef OPENSSL_NO_DTLS1
748    {"dtls1", OPT_DTLS1, '-', "Just use DTLSv1"},
749#endif
750#ifndef OPENSSL_NO_DTLS1_2
751    {"dtls1_2", OPT_DTLS1_2, '-', "Just use DTLSv1.2"},
752#endif
753#ifndef OPENSSL_NO_SCTP
754    {"sctp", OPT_SCTP, '-', "Use SCTP"},
755    {"sctp_label_bug", OPT_SCTP_LABEL_BUG, '-', "Enable SCTP label length bug"},
756#endif
757#ifndef OPENSSL_NO_SSL_TRACE
758    {"trace", OPT_TRACE, '-', "Show trace output of protocol messages"},
759#endif
760#ifdef WATT32
761    {"wdebug", OPT_WDEBUG, '-', "WATT-32 tcp debugging"},
762#endif
763    {"nbio", OPT_NBIO, '-', "Use non-blocking IO"},
764    {"psk_identity", OPT_PSK_IDENTITY, 's', "PSK identity"},
765    {"psk", OPT_PSK, 's', "PSK in hex (without 0x)"},
766    {"psk_session", OPT_PSK_SESS, '<', "File to read PSK SSL session from"},
767#ifndef OPENSSL_NO_SRP
768    {"srpuser", OPT_SRPUSER, 's', "SRP authentication for 'user'"},
769    {"srppass", OPT_SRPPASS, 's', "Password for 'user'"},
770    {"srp_lateuser", OPT_SRP_LATEUSER, '-',
771     "SRP username into second ClientHello message"},
772    {"srp_moregroups", OPT_SRP_MOREGROUPS, '-',
773     "Tolerate other than the known g N values."},
774    {"srp_strength", OPT_SRP_STRENGTH, 'p', "Minimal length in bits for N"},
775#endif
776#ifndef OPENSSL_NO_NEXTPROTONEG
777    {"nextprotoneg", OPT_NEXTPROTONEG, 's',
778     "Enable NPN extension, considering named protocols supported (comma-separated list)"},
779#endif
780#ifndef OPENSSL_NO_ENGINE
781    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
782    {"ssl_client_engine", OPT_SSL_CLIENT_ENGINE, 's',
783     "Specify engine to be used for client certificate operations"},
784#endif
785#ifndef OPENSSL_NO_CT
786    {"ct", OPT_CT, '-', "Request and parse SCTs (also enables OCSP stapling)"},
787    {"noct", OPT_NOCT, '-', "Do not request or parse SCTs (default)"},
788    {"ctlogfile", OPT_CTLOG_FILE, '<', "CT log list CONF file"},
789#endif
790    {"keylogfile", OPT_KEYLOG_FILE, '>', "Write TLS secrets to file"},
791    {"early_data", OPT_EARLY_DATA, '<', "File to send as early data"},
792    {"enable_pha", OPT_ENABLE_PHA, '-', "Enable post-handshake-authentication"},
793    {NULL, OPT_EOF, 0x00, NULL}
794};
795
796typedef enum PROTOCOL_choice {
797    PROTO_OFF,
798    PROTO_SMTP,
799    PROTO_POP3,
800    PROTO_IMAP,
801    PROTO_FTP,
802    PROTO_TELNET,
803    PROTO_XMPP,
804    PROTO_XMPP_SERVER,
805    PROTO_CONNECT,
806    PROTO_IRC,
807    PROTO_MYSQL,
808    PROTO_POSTGRES,
809    PROTO_LMTP,
810    PROTO_NNTP,
811    PROTO_SIEVE,
812    PROTO_LDAP
813} PROTOCOL_CHOICE;
814
815static const OPT_PAIR services[] = {
816    {"smtp", PROTO_SMTP},
817    {"pop3", PROTO_POP3},
818    {"imap", PROTO_IMAP},
819    {"ftp", PROTO_FTP},
820    {"xmpp", PROTO_XMPP},
821    {"xmpp-server", PROTO_XMPP_SERVER},
822    {"telnet", PROTO_TELNET},
823    {"irc", PROTO_IRC},
824    {"mysql", PROTO_MYSQL},
825    {"postgres", PROTO_POSTGRES},
826    {"lmtp", PROTO_LMTP},
827    {"nntp", PROTO_NNTP},
828    {"sieve", PROTO_SIEVE},
829    {"ldap", PROTO_LDAP},
830    {NULL, 0}
831};
832
833#define IS_INET_FLAG(o) \
834 (o == OPT_4 || o == OPT_6 || o == OPT_HOST || o == OPT_PORT || o == OPT_CONNECT)
835#define IS_UNIX_FLAG(o) (o == OPT_UNIX)
836
837#define IS_PROT_FLAG(o) \
838 (o == OPT_SSL3 || o == OPT_TLS1 || o == OPT_TLS1_1 || o == OPT_TLS1_2 \
839  || o == OPT_TLS1_3 || o == OPT_DTLS || o == OPT_DTLS1 || o == OPT_DTLS1_2)
840
841/* Free |*dest| and optionally set it to a copy of |source|. */
842static void freeandcopy(char **dest, const char *source)
843{
844    OPENSSL_free(*dest);
845    *dest = NULL;
846    if (source != NULL)
847        *dest = OPENSSL_strdup(source);
848}
849
850static int new_session_cb(SSL *s, SSL_SESSION *sess)
851{
852
853    if (sess_out != NULL) {
854        BIO *stmp = BIO_new_file(sess_out, "w");
855
856        if (stmp == NULL) {
857            BIO_printf(bio_err, "Error writing session file %s\n", sess_out);
858        } else {
859            PEM_write_bio_SSL_SESSION(stmp, sess);
860            BIO_free(stmp);
861        }
862    }
863
864    /*
865     * Session data gets dumped on connection for TLSv1.2 and below, and on
866     * arrival of the NewSessionTicket for TLSv1.3.
867     */
868    if (SSL_version(s) == TLS1_3_VERSION) {
869        BIO_printf(bio_c_out,
870                   "---\nPost-Handshake New Session Ticket arrived:\n");
871        SSL_SESSION_print(bio_c_out, sess);
872        BIO_printf(bio_c_out, "---\n");
873    }
874
875    /*
876     * We always return a "fail" response so that the session gets freed again
877     * because we haven't used the reference.
878     */
879    return 0;
880}
881
882int s_client_main(int argc, char **argv)
883{
884    BIO *sbio;
885    EVP_PKEY *key = NULL;
886    SSL *con = NULL;
887    SSL_CTX *ctx = NULL;
888    STACK_OF(X509) *chain = NULL;
889    X509 *cert = NULL;
890    X509_VERIFY_PARAM *vpm = NULL;
891    SSL_EXCERT *exc = NULL;
892    SSL_CONF_CTX *cctx = NULL;
893    STACK_OF(OPENSSL_STRING) *ssl_args = NULL;
894    char *dane_tlsa_domain = NULL;
895    STACK_OF(OPENSSL_STRING) *dane_tlsa_rrset = NULL;
896    int dane_ee_no_name = 0;
897    STACK_OF(X509_CRL) *crls = NULL;
898    const SSL_METHOD *meth = TLS_client_method();
899    const char *CApath = NULL, *CAfile = NULL;
900    char *cbuf = NULL, *sbuf = NULL;
901    char *mbuf = NULL, *proxystr = NULL, *connectstr = NULL, *bindstr = NULL;
902    char *cert_file = NULL, *key_file = NULL, *chain_file = NULL;
903    char *chCApath = NULL, *chCAfile = NULL, *host = NULL;
904    char *port = OPENSSL_strdup(PORT);
905    char *bindhost = NULL, *bindport = NULL;
906    char *passarg = NULL, *pass = NULL, *vfyCApath = NULL, *vfyCAfile = NULL;
907    char *ReqCAfile = NULL;
908    char *sess_in = NULL, *crl_file = NULL, *p;
909    const char *protohost = NULL;
910    struct timeval timeout, *timeoutp;
911    fd_set readfds, writefds;
912    int noCApath = 0, noCAfile = 0;
913    int build_chain = 0, cbuf_len, cbuf_off, cert_format = FORMAT_PEM;
914    int key_format = FORMAT_PEM, crlf = 0, full_log = 1, mbuf_len = 0;
915    int prexit = 0;
916    int sdebug = 0;
917    int reconnect = 0, verify = SSL_VERIFY_NONE, vpmtouched = 0;
918    int ret = 1, in_init = 1, i, nbio_test = 0, s = -1, k, width, state = 0;
919    int sbuf_len, sbuf_off, cmdletters = 1;
920    int socket_family = AF_UNSPEC, socket_type = SOCK_STREAM, protocol = 0;
921    int starttls_proto = PROTO_OFF, crl_format = FORMAT_PEM, crl_download = 0;
922    int write_tty, read_tty, write_ssl, read_ssl, tty_on, ssl_pending;
923#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
924    int at_eof = 0;
925#endif
926    int read_buf_len = 0;
927    int fallback_scsv = 0;
928    OPTION_CHOICE o;
929#ifndef OPENSSL_NO_DTLS
930    int enable_timeouts = 0;
931    long socket_mtu = 0;
932#endif
933#ifndef OPENSSL_NO_ENGINE
934    ENGINE *ssl_client_engine = NULL;
935#endif
936    ENGINE *e = NULL;
937#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
938    struct timeval tv;
939#endif
940    const char *servername = NULL;
941    int noservername = 0;
942    const char *alpn_in = NULL;
943    tlsextctx tlsextcbp = { NULL, 0 };
944    const char *ssl_config = NULL;
945#define MAX_SI_TYPES 100
946    unsigned short serverinfo_types[MAX_SI_TYPES];
947    int serverinfo_count = 0, start = 0, len;
948#ifndef OPENSSL_NO_NEXTPROTONEG
949    const char *next_proto_neg_in = NULL;
950#endif
951#ifndef OPENSSL_NO_SRP
952    char *srppass = NULL;
953    int srp_lateuser = 0;
954    SRP_ARG srp_arg = { NULL, NULL, 0, 0, 0, 1024 };
955#endif
956#ifndef OPENSSL_NO_SRTP
957    char *srtp_profiles = NULL;
958#endif
959#ifndef OPENSSL_NO_CT
960    char *ctlog_file = NULL;
961    int ct_validation = 0;
962#endif
963    int min_version = 0, max_version = 0, prot_opt = 0, no_prot_opt = 0;
964    int async = 0;
965    unsigned int max_send_fragment = 0;
966    unsigned int split_send_fragment = 0, max_pipelines = 0;
967    enum { use_inet, use_unix, use_unknown } connect_type = use_unknown;
968    int count4or6 = 0;
969    uint8_t maxfraglen = 0;
970    int c_nbio = 0, c_msg = 0, c_ign_eof = 0, c_brief = 0;
971    int c_tlsextdebug = 0;
972#ifndef OPENSSL_NO_OCSP
973    int c_status_req = 0;
974#endif
975    BIO *bio_c_msg = NULL;
976    const char *keylog_file = NULL, *early_data_file = NULL;
977#ifndef OPENSSL_NO_DTLS
978    int isdtls = 0;
979#endif
980    char *psksessf = NULL;
981    int enable_pha = 0;
982#ifndef OPENSSL_NO_SCTP
983    int sctp_label_bug = 0;
984#endif
985
986    FD_ZERO(&readfds);
987    FD_ZERO(&writefds);
988/* Known false-positive of MemorySanitizer. */
989#if defined(__has_feature)
990# if __has_feature(memory_sanitizer)
991    __msan_unpoison(&readfds, sizeof(readfds));
992    __msan_unpoison(&writefds, sizeof(writefds));
993# endif
994#endif
995
996    prog = opt_progname(argv[0]);
997    c_quiet = 0;
998    c_debug = 0;
999    c_showcerts = 0;
1000    c_nbio = 0;
1001    vpm = X509_VERIFY_PARAM_new();
1002    cctx = SSL_CONF_CTX_new();
1003
1004    if (vpm == NULL || cctx == NULL) {
1005        BIO_printf(bio_err, "%s: out of memory\n", prog);
1006        goto end;
1007    }
1008
1009    cbuf = app_malloc(BUFSIZZ, "cbuf");
1010    sbuf = app_malloc(BUFSIZZ, "sbuf");
1011    mbuf = app_malloc(BUFSIZZ, "mbuf");
1012
1013    SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT | SSL_CONF_FLAG_CMDLINE);
1014
1015    prog = opt_init(argc, argv, s_client_options);
1016    while ((o = opt_next()) != OPT_EOF) {
1017        /* Check for intermixing flags. */
1018        if (connect_type == use_unix && IS_INET_FLAG(o)) {
1019            BIO_printf(bio_err,
1020                       "%s: Intermixed protocol flags (unix and internet domains)\n",
1021                       prog);
1022            goto end;
1023        }
1024        if (connect_type == use_inet && IS_UNIX_FLAG(o)) {
1025            BIO_printf(bio_err,
1026                       "%s: Intermixed protocol flags (internet and unix domains)\n",
1027                       prog);
1028            goto end;
1029        }
1030
1031        if (IS_PROT_FLAG(o) && ++prot_opt > 1) {
1032            BIO_printf(bio_err, "Cannot supply multiple protocol flags\n");
1033            goto end;
1034        }
1035        if (IS_NO_PROT_FLAG(o))
1036            no_prot_opt++;
1037        if (prot_opt == 1 && no_prot_opt) {
1038            BIO_printf(bio_err,
1039                       "Cannot supply both a protocol flag and '-no_<prot>'\n");
1040            goto end;
1041        }
1042
1043        switch (o) {
1044        case OPT_EOF:
1045        case OPT_ERR:
1046 opthelp:
1047            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
1048            goto end;
1049        case OPT_HELP:
1050            opt_help(s_client_options);
1051            ret = 0;
1052            goto end;
1053        case OPT_4:
1054            connect_type = use_inet;
1055            socket_family = AF_INET;
1056            count4or6++;
1057            break;
1058#ifdef AF_INET6
1059        case OPT_6:
1060            connect_type = use_inet;
1061            socket_family = AF_INET6;
1062            count4or6++;
1063            break;
1064#endif
1065        case OPT_HOST:
1066            connect_type = use_inet;
1067            freeandcopy(&host, opt_arg());
1068            break;
1069        case OPT_PORT:
1070            connect_type = use_inet;
1071            freeandcopy(&port, opt_arg());
1072            break;
1073        case OPT_CONNECT:
1074            connect_type = use_inet;
1075            freeandcopy(&connectstr, opt_arg());
1076            break;
1077        case OPT_BIND:
1078            freeandcopy(&bindstr, opt_arg());
1079            break;
1080        case OPT_PROXY:
1081            proxystr = opt_arg();
1082            starttls_proto = PROTO_CONNECT;
1083            break;
1084#ifdef AF_UNIX
1085        case OPT_UNIX:
1086            connect_type = use_unix;
1087            socket_family = AF_UNIX;
1088            freeandcopy(&host, opt_arg());
1089            break;
1090#endif
1091        case OPT_XMPPHOST:
1092            /* fall through, since this is an alias */
1093        case OPT_PROTOHOST:
1094            protohost = opt_arg();
1095            break;
1096        case OPT_VERIFY:
1097            verify = SSL_VERIFY_PEER;
1098            verify_args.depth = atoi(opt_arg());
1099            if (!c_quiet)
1100                BIO_printf(bio_err, "verify depth is %d\n", verify_args.depth);
1101            break;
1102        case OPT_CERT:
1103            cert_file = opt_arg();
1104            break;
1105        case OPT_NAMEOPT:
1106            if (!set_nameopt(opt_arg()))
1107                goto end;
1108            break;
1109        case OPT_CRL:
1110            crl_file = opt_arg();
1111            break;
1112        case OPT_CRL_DOWNLOAD:
1113            crl_download = 1;
1114            break;
1115        case OPT_SESS_OUT:
1116            sess_out = opt_arg();
1117            break;
1118        case OPT_SESS_IN:
1119            sess_in = opt_arg();
1120            break;
1121        case OPT_CERTFORM:
1122            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &cert_format))
1123                goto opthelp;
1124            break;
1125        case OPT_CRLFORM:
1126            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &crl_format))
1127                goto opthelp;
1128            break;
1129        case OPT_VERIFY_RET_ERROR:
1130            verify = SSL_VERIFY_PEER;
1131            verify_args.return_error = 1;
1132            break;
1133        case OPT_VERIFY_QUIET:
1134            verify_args.quiet = 1;
1135            break;
1136        case OPT_BRIEF:
1137            c_brief = verify_args.quiet = c_quiet = 1;
1138            break;
1139        case OPT_S_CASES:
1140            if (ssl_args == NULL)
1141                ssl_args = sk_OPENSSL_STRING_new_null();
1142            if (ssl_args == NULL
1143                || !sk_OPENSSL_STRING_push(ssl_args, opt_flag())
1144                || !sk_OPENSSL_STRING_push(ssl_args, opt_arg())) {
1145                BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
1146                goto end;
1147            }
1148            break;
1149        case OPT_V_CASES:
1150            if (!opt_verify(o, vpm))
1151                goto end;
1152            vpmtouched++;
1153            break;
1154        case OPT_X_CASES:
1155            if (!args_excert(o, &exc))
1156                goto end;
1157            break;
1158        case OPT_PREXIT:
1159            prexit = 1;
1160            break;
1161        case OPT_CRLF:
1162            crlf = 1;
1163            break;
1164        case OPT_QUIET:
1165            c_quiet = c_ign_eof = 1;
1166            break;
1167        case OPT_NBIO:
1168            c_nbio = 1;
1169            break;
1170        case OPT_NOCMDS:
1171            cmdletters = 0;
1172            break;
1173        case OPT_ENGINE:
1174            e = setup_engine(opt_arg(), 1);
1175            break;
1176        case OPT_SSL_CLIENT_ENGINE:
1177#ifndef OPENSSL_NO_ENGINE
1178            ssl_client_engine = ENGINE_by_id(opt_arg());
1179            if (ssl_client_engine == NULL) {
1180                BIO_printf(bio_err, "Error getting client auth engine\n");
1181                goto opthelp;
1182            }
1183#endif
1184            break;
1185        case OPT_R_CASES:
1186            if (!opt_rand(o))
1187                goto end;
1188            break;
1189        case OPT_IGN_EOF:
1190            c_ign_eof = 1;
1191            break;
1192        case OPT_NO_IGN_EOF:
1193            c_ign_eof = 0;
1194            break;
1195        case OPT_DEBUG:
1196            c_debug = 1;
1197            break;
1198        case OPT_TLSEXTDEBUG:
1199            c_tlsextdebug = 1;
1200            break;
1201        case OPT_STATUS:
1202#ifndef OPENSSL_NO_OCSP
1203            c_status_req = 1;
1204#endif
1205            break;
1206        case OPT_WDEBUG:
1207#ifdef WATT32
1208            dbug_init();
1209#endif
1210            break;
1211        case OPT_MSG:
1212            c_msg = 1;
1213            break;
1214        case OPT_MSGFILE:
1215            bio_c_msg = BIO_new_file(opt_arg(), "w");
1216            break;
1217        case OPT_TRACE:
1218#ifndef OPENSSL_NO_SSL_TRACE
1219            c_msg = 2;
1220#endif
1221            break;
1222        case OPT_SECURITY_DEBUG:
1223            sdebug = 1;
1224            break;
1225        case OPT_SECURITY_DEBUG_VERBOSE:
1226            sdebug = 2;
1227            break;
1228        case OPT_SHOWCERTS:
1229            c_showcerts = 1;
1230            break;
1231        case OPT_NBIO_TEST:
1232            nbio_test = 1;
1233            break;
1234        case OPT_STATE:
1235            state = 1;
1236            break;
1237        case OPT_PSK_IDENTITY:
1238            psk_identity = opt_arg();
1239            break;
1240        case OPT_PSK:
1241            for (p = psk_key = opt_arg(); *p; p++) {
1242                if (isxdigit(_UC(*p)))
1243                    continue;
1244                BIO_printf(bio_err, "Not a hex number '%s'\n", psk_key);
1245                goto end;
1246            }
1247            break;
1248        case OPT_PSK_SESS:
1249            psksessf = opt_arg();
1250            break;
1251#ifndef OPENSSL_NO_SRP
1252        case OPT_SRPUSER:
1253            srp_arg.srplogin = opt_arg();
1254            if (min_version < TLS1_VERSION)
1255                min_version = TLS1_VERSION;
1256            break;
1257        case OPT_SRPPASS:
1258            srppass = opt_arg();
1259            if (min_version < TLS1_VERSION)
1260                min_version = TLS1_VERSION;
1261            break;
1262        case OPT_SRP_STRENGTH:
1263            srp_arg.strength = atoi(opt_arg());
1264            BIO_printf(bio_err, "SRP minimal length for N is %d\n",
1265                       srp_arg.strength);
1266            if (min_version < TLS1_VERSION)
1267                min_version = TLS1_VERSION;
1268            break;
1269        case OPT_SRP_LATEUSER:
1270            srp_lateuser = 1;
1271            if (min_version < TLS1_VERSION)
1272                min_version = TLS1_VERSION;
1273            break;
1274        case OPT_SRP_MOREGROUPS:
1275            srp_arg.amp = 1;
1276            if (min_version < TLS1_VERSION)
1277                min_version = TLS1_VERSION;
1278            break;
1279#endif
1280        case OPT_SSL_CONFIG:
1281            ssl_config = opt_arg();
1282            break;
1283        case OPT_SSL3:
1284            min_version = SSL3_VERSION;
1285            max_version = SSL3_VERSION;
1286            break;
1287        case OPT_TLS1_3:
1288            min_version = TLS1_3_VERSION;
1289            max_version = TLS1_3_VERSION;
1290            break;
1291        case OPT_TLS1_2:
1292            min_version = TLS1_2_VERSION;
1293            max_version = TLS1_2_VERSION;
1294            break;
1295        case OPT_TLS1_1:
1296            min_version = TLS1_1_VERSION;
1297            max_version = TLS1_1_VERSION;
1298            break;
1299        case OPT_TLS1:
1300            min_version = TLS1_VERSION;
1301            max_version = TLS1_VERSION;
1302            break;
1303        case OPT_DTLS:
1304#ifndef OPENSSL_NO_DTLS
1305            meth = DTLS_client_method();
1306            socket_type = SOCK_DGRAM;
1307            isdtls = 1;
1308#endif
1309            break;
1310        case OPT_DTLS1:
1311#ifndef OPENSSL_NO_DTLS1
1312            meth = DTLS_client_method();
1313            min_version = DTLS1_VERSION;
1314            max_version = DTLS1_VERSION;
1315            socket_type = SOCK_DGRAM;
1316            isdtls = 1;
1317#endif
1318            break;
1319        case OPT_DTLS1_2:
1320#ifndef OPENSSL_NO_DTLS1_2
1321            meth = DTLS_client_method();
1322            min_version = DTLS1_2_VERSION;
1323            max_version = DTLS1_2_VERSION;
1324            socket_type = SOCK_DGRAM;
1325            isdtls = 1;
1326#endif
1327            break;
1328        case OPT_SCTP:
1329#ifndef OPENSSL_NO_SCTP
1330            protocol = IPPROTO_SCTP;
1331#endif
1332            break;
1333        case OPT_SCTP_LABEL_BUG:
1334#ifndef OPENSSL_NO_SCTP
1335            sctp_label_bug = 1;
1336#endif
1337            break;
1338        case OPT_TIMEOUT:
1339#ifndef OPENSSL_NO_DTLS
1340            enable_timeouts = 1;
1341#endif
1342            break;
1343        case OPT_MTU:
1344#ifndef OPENSSL_NO_DTLS
1345            socket_mtu = atol(opt_arg());
1346#endif
1347            break;
1348        case OPT_FALLBACKSCSV:
1349            fallback_scsv = 1;
1350            break;
1351        case OPT_KEYFORM:
1352            if (!opt_format(opt_arg(), OPT_FMT_PDE, &key_format))
1353                goto opthelp;
1354            break;
1355        case OPT_PASS:
1356            passarg = opt_arg();
1357            break;
1358        case OPT_CERT_CHAIN:
1359            chain_file = opt_arg();
1360            break;
1361        case OPT_KEY:
1362            key_file = opt_arg();
1363            break;
1364        case OPT_RECONNECT:
1365            reconnect = 5;
1366            break;
1367        case OPT_CAPATH:
1368            CApath = opt_arg();
1369            break;
1370        case OPT_NOCAPATH:
1371            noCApath = 1;
1372            break;
1373        case OPT_CHAINCAPATH:
1374            chCApath = opt_arg();
1375            break;
1376        case OPT_VERIFYCAPATH:
1377            vfyCApath = opt_arg();
1378            break;
1379        case OPT_BUILD_CHAIN:
1380            build_chain = 1;
1381            break;
1382        case OPT_REQCAFILE:
1383            ReqCAfile = opt_arg();
1384            break;
1385        case OPT_CAFILE:
1386            CAfile = opt_arg();
1387            break;
1388        case OPT_NOCAFILE:
1389            noCAfile = 1;
1390            break;
1391#ifndef OPENSSL_NO_CT
1392        case OPT_NOCT:
1393            ct_validation = 0;
1394            break;
1395        case OPT_CT:
1396            ct_validation = 1;
1397            break;
1398        case OPT_CTLOG_FILE:
1399            ctlog_file = opt_arg();
1400            break;
1401#endif
1402        case OPT_CHAINCAFILE:
1403            chCAfile = opt_arg();
1404            break;
1405        case OPT_VERIFYCAFILE:
1406            vfyCAfile = opt_arg();
1407            break;
1408        case OPT_DANE_TLSA_DOMAIN:
1409            dane_tlsa_domain = opt_arg();
1410            break;
1411        case OPT_DANE_TLSA_RRDATA:
1412            if (dane_tlsa_rrset == NULL)
1413                dane_tlsa_rrset = sk_OPENSSL_STRING_new_null();
1414            if (dane_tlsa_rrset == NULL ||
1415                !sk_OPENSSL_STRING_push(dane_tlsa_rrset, opt_arg())) {
1416                BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
1417                goto end;
1418            }
1419            break;
1420        case OPT_DANE_EE_NO_NAME:
1421            dane_ee_no_name = 1;
1422            break;
1423        case OPT_NEXTPROTONEG:
1424#ifndef OPENSSL_NO_NEXTPROTONEG
1425            next_proto_neg_in = opt_arg();
1426#endif
1427            break;
1428        case OPT_ALPN:
1429            alpn_in = opt_arg();
1430            break;
1431        case OPT_SERVERINFO:
1432            p = opt_arg();
1433            len = strlen(p);
1434            for (start = 0, i = 0; i <= len; ++i) {
1435                if (i == len || p[i] == ',') {
1436                    serverinfo_types[serverinfo_count] = atoi(p + start);
1437                    if (++serverinfo_count == MAX_SI_TYPES)
1438                        break;
1439                    start = i + 1;
1440                }
1441            }
1442            break;
1443        case OPT_STARTTLS:
1444            if (!opt_pair(opt_arg(), services, &starttls_proto))
1445                goto end;
1446            break;
1447        case OPT_SERVERNAME:
1448            servername = opt_arg();
1449            break;
1450        case OPT_NOSERVERNAME:
1451            noservername = 1;
1452            break;
1453        case OPT_USE_SRTP:
1454#ifndef OPENSSL_NO_SRTP
1455            srtp_profiles = opt_arg();
1456#endif
1457            break;
1458        case OPT_KEYMATEXPORT:
1459            keymatexportlabel = opt_arg();
1460            break;
1461        case OPT_KEYMATEXPORTLEN:
1462            keymatexportlen = atoi(opt_arg());
1463            break;
1464        case OPT_ASYNC:
1465            async = 1;
1466            break;
1467        case OPT_MAXFRAGLEN:
1468            len = atoi(opt_arg());
1469            switch (len) {
1470            case 512:
1471                maxfraglen = TLSEXT_max_fragment_length_512;
1472                break;
1473            case 1024:
1474                maxfraglen = TLSEXT_max_fragment_length_1024;
1475                break;
1476            case 2048:
1477                maxfraglen = TLSEXT_max_fragment_length_2048;
1478                break;
1479            case 4096:
1480                maxfraglen = TLSEXT_max_fragment_length_4096;
1481                break;
1482            default:
1483                BIO_printf(bio_err,
1484                           "%s: Max Fragment Len %u is out of permitted values",
1485                           prog, len);
1486                goto opthelp;
1487            }
1488            break;
1489        case OPT_MAX_SEND_FRAG:
1490            max_send_fragment = atoi(opt_arg());
1491            break;
1492        case OPT_SPLIT_SEND_FRAG:
1493            split_send_fragment = atoi(opt_arg());
1494            break;
1495        case OPT_MAX_PIPELINES:
1496            max_pipelines = atoi(opt_arg());
1497            break;
1498        case OPT_READ_BUF:
1499            read_buf_len = atoi(opt_arg());
1500            break;
1501        case OPT_KEYLOG_FILE:
1502            keylog_file = opt_arg();
1503            break;
1504        case OPT_EARLY_DATA:
1505            early_data_file = opt_arg();
1506            break;
1507        case OPT_ENABLE_PHA:
1508            enable_pha = 1;
1509            break;
1510        }
1511    }
1512    if (count4or6 >= 2) {
1513        BIO_printf(bio_err, "%s: Can't use both -4 and -6\n", prog);
1514        goto opthelp;
1515    }
1516    if (noservername) {
1517        if (servername != NULL) {
1518            BIO_printf(bio_err,
1519                       "%s: Can't use -servername and -noservername together\n",
1520                       prog);
1521            goto opthelp;
1522        }
1523        if (dane_tlsa_domain != NULL) {
1524            BIO_printf(bio_err,
1525               "%s: Can't use -dane_tlsa_domain and -noservername together\n",
1526               prog);
1527            goto opthelp;
1528        }
1529    }
1530    argc = opt_num_rest();
1531    if (argc == 1) {
1532        /* If there's a positional argument, it's the equivalent of
1533         * OPT_CONNECT.
1534         * Don't allow -connect and a separate argument.
1535         */
1536        if (connectstr != NULL) {
1537            BIO_printf(bio_err,
1538                       "%s: must not provide both -connect option and target parameter\n",
1539                       prog);
1540            goto opthelp;
1541        }
1542        connect_type = use_inet;
1543        freeandcopy(&connectstr, *opt_rest());
1544    } else if (argc != 0) {
1545        goto opthelp;
1546    }
1547
1548#ifndef OPENSSL_NO_NEXTPROTONEG
1549    if (min_version == TLS1_3_VERSION && next_proto_neg_in != NULL) {
1550        BIO_printf(bio_err, "Cannot supply -nextprotoneg with TLSv1.3\n");
1551        goto opthelp;
1552    }
1553#endif
1554    if (proxystr != NULL) {
1555        int res;
1556        char *tmp_host = host, *tmp_port = port;
1557        if (connectstr == NULL) {
1558            BIO_printf(bio_err, "%s: -proxy requires use of -connect or target parameter\n", prog);
1559            goto opthelp;
1560        }
1561        res = BIO_parse_hostserv(proxystr, &host, &port, BIO_PARSE_PRIO_HOST);
1562        if (tmp_host != host)
1563            OPENSSL_free(tmp_host);
1564        if (tmp_port != port)
1565            OPENSSL_free(tmp_port);
1566        if (!res) {
1567            BIO_printf(bio_err,
1568                       "%s: -proxy argument malformed or ambiguous\n", prog);
1569            goto end;
1570        }
1571    } else {
1572        int res = 1;
1573        char *tmp_host = host, *tmp_port = port;
1574        if (connectstr != NULL)
1575            res = BIO_parse_hostserv(connectstr, &host, &port,
1576                                     BIO_PARSE_PRIO_HOST);
1577        if (tmp_host != host)
1578            OPENSSL_free(tmp_host);
1579        if (tmp_port != port)
1580            OPENSSL_free(tmp_port);
1581        if (!res) {
1582            BIO_printf(bio_err,
1583                       "%s: -connect argument or target parameter malformed or ambiguous\n",
1584                       prog);
1585            goto end;
1586        }
1587    }
1588
1589    if (bindstr != NULL) {
1590        int res;
1591        res = BIO_parse_hostserv(bindstr, &bindhost, &bindport,
1592                                 BIO_PARSE_PRIO_HOST);
1593        if (!res) {
1594            BIO_printf(bio_err,
1595                       "%s: -bind argument parameter malformed or ambiguous\n",
1596                       prog);
1597            goto end;
1598        }
1599    }
1600
1601#ifdef AF_UNIX
1602    if (socket_family == AF_UNIX && socket_type != SOCK_STREAM) {
1603        BIO_printf(bio_err,
1604                   "Can't use unix sockets and datagrams together\n");
1605        goto end;
1606    }
1607#endif
1608
1609#ifndef OPENSSL_NO_SCTP
1610    if (protocol == IPPROTO_SCTP) {
1611        if (socket_type != SOCK_DGRAM) {
1612            BIO_printf(bio_err, "Can't use -sctp without DTLS\n");
1613            goto end;
1614        }
1615        /* SCTP is unusual. It uses DTLS over a SOCK_STREAM protocol */
1616        socket_type = SOCK_STREAM;
1617    }
1618#endif
1619
1620#if !defined(OPENSSL_NO_NEXTPROTONEG)
1621    next_proto.status = -1;
1622    if (next_proto_neg_in) {
1623        next_proto.data =
1624            next_protos_parse(&next_proto.len, next_proto_neg_in);
1625        if (next_proto.data == NULL) {
1626            BIO_printf(bio_err, "Error parsing -nextprotoneg argument\n");
1627            goto end;
1628        }
1629    } else
1630        next_proto.data = NULL;
1631#endif
1632
1633    if (!app_passwd(passarg, NULL, &pass, NULL)) {
1634        BIO_printf(bio_err, "Error getting password\n");
1635        goto end;
1636    }
1637
1638    if (key_file == NULL)
1639        key_file = cert_file;
1640
1641    if (key_file != NULL) {
1642        key = load_key(key_file, key_format, 0, pass, e,
1643                       "client certificate private key file");
1644        if (key == NULL) {
1645            ERR_print_errors(bio_err);
1646            goto end;
1647        }
1648    }
1649
1650    if (cert_file != NULL) {
1651        cert = load_cert(cert_file, cert_format, "client certificate file");
1652        if (cert == NULL) {
1653            ERR_print_errors(bio_err);
1654            goto end;
1655        }
1656    }
1657
1658    if (chain_file != NULL) {
1659        if (!load_certs(chain_file, &chain, FORMAT_PEM, NULL,
1660                        "client certificate chain"))
1661            goto end;
1662    }
1663
1664    if (crl_file != NULL) {
1665        X509_CRL *crl;
1666        crl = load_crl(crl_file, crl_format);
1667        if (crl == NULL) {
1668            BIO_puts(bio_err, "Error loading CRL\n");
1669            ERR_print_errors(bio_err);
1670            goto end;
1671        }
1672        crls = sk_X509_CRL_new_null();
1673        if (crls == NULL || !sk_X509_CRL_push(crls, crl)) {
1674            BIO_puts(bio_err, "Error adding CRL\n");
1675            ERR_print_errors(bio_err);
1676            X509_CRL_free(crl);
1677            goto end;
1678        }
1679    }
1680
1681    if (!load_excert(&exc))
1682        goto end;
1683
1684    if (bio_c_out == NULL) {
1685        if (c_quiet && !c_debug) {
1686            bio_c_out = BIO_new(BIO_s_null());
1687            if (c_msg && bio_c_msg == NULL)
1688                bio_c_msg = dup_bio_out(FORMAT_TEXT);
1689        } else if (bio_c_out == NULL)
1690            bio_c_out = dup_bio_out(FORMAT_TEXT);
1691    }
1692#ifndef OPENSSL_NO_SRP
1693    if (!app_passwd(srppass, NULL, &srp_arg.srppassin, NULL)) {
1694        BIO_printf(bio_err, "Error getting password\n");
1695        goto end;
1696    }
1697#endif
1698
1699    ctx = SSL_CTX_new(meth);
1700    if (ctx == NULL) {
1701        ERR_print_errors(bio_err);
1702        goto end;
1703    }
1704
1705    SSL_CTX_clear_mode(ctx, SSL_MODE_AUTO_RETRY);
1706
1707    if (sdebug)
1708        ssl_ctx_security_debug(ctx, sdebug);
1709
1710    if (!config_ctx(cctx, ssl_args, ctx))
1711        goto end;
1712
1713    if (ssl_config != NULL) {
1714        if (SSL_CTX_config(ctx, ssl_config) == 0) {
1715            BIO_printf(bio_err, "Error using configuration \"%s\"\n",
1716                       ssl_config);
1717            ERR_print_errors(bio_err);
1718            goto end;
1719        }
1720    }
1721
1722#ifndef OPENSSL_NO_SCTP
1723    if (protocol == IPPROTO_SCTP && sctp_label_bug == 1)
1724        SSL_CTX_set_mode(ctx, SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG);
1725#endif
1726
1727    if (min_version != 0
1728        && SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
1729        goto end;
1730    if (max_version != 0
1731        && SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
1732        goto end;
1733
1734    if (vpmtouched && !SSL_CTX_set1_param(ctx, vpm)) {
1735        BIO_printf(bio_err, "Error setting verify params\n");
1736        ERR_print_errors(bio_err);
1737        goto end;
1738    }
1739
1740    if (async) {
1741        SSL_CTX_set_mode(ctx, SSL_MODE_ASYNC);
1742    }
1743
1744    if (max_send_fragment > 0
1745        && !SSL_CTX_set_max_send_fragment(ctx, max_send_fragment)) {
1746        BIO_printf(bio_err, "%s: Max send fragment size %u is out of permitted range\n",
1747                   prog, max_send_fragment);
1748        goto end;
1749    }
1750
1751    if (split_send_fragment > 0
1752        && !SSL_CTX_set_split_send_fragment(ctx, split_send_fragment)) {
1753        BIO_printf(bio_err, "%s: Split send fragment size %u is out of permitted range\n",
1754                   prog, split_send_fragment);
1755        goto end;
1756    }
1757
1758    if (max_pipelines > 0
1759        && !SSL_CTX_set_max_pipelines(ctx, max_pipelines)) {
1760        BIO_printf(bio_err, "%s: Max pipelines %u is out of permitted range\n",
1761                   prog, max_pipelines);
1762        goto end;
1763    }
1764
1765    if (read_buf_len > 0) {
1766        SSL_CTX_set_default_read_buffer_len(ctx, read_buf_len);
1767    }
1768
1769    if (maxfraglen > 0
1770            && !SSL_CTX_set_tlsext_max_fragment_length(ctx, maxfraglen)) {
1771        BIO_printf(bio_err,
1772                   "%s: Max Fragment Length code %u is out of permitted values"
1773                   "\n", prog, maxfraglen);
1774        goto end;
1775    }
1776
1777    if (!ssl_load_stores(ctx, vfyCApath, vfyCAfile, chCApath, chCAfile,
1778                         crls, crl_download)) {
1779        BIO_printf(bio_err, "Error loading store locations\n");
1780        ERR_print_errors(bio_err);
1781        goto end;
1782    }
1783    if (ReqCAfile != NULL) {
1784        STACK_OF(X509_NAME) *nm = sk_X509_NAME_new_null();
1785
1786        if (nm == NULL || !SSL_add_file_cert_subjects_to_stack(nm, ReqCAfile)) {
1787            sk_X509_NAME_pop_free(nm, X509_NAME_free);
1788            BIO_printf(bio_err, "Error loading CA names\n");
1789            ERR_print_errors(bio_err);
1790            goto end;
1791        }
1792        SSL_CTX_set0_CA_list(ctx, nm);
1793    }
1794#ifndef OPENSSL_NO_ENGINE
1795    if (ssl_client_engine) {
1796        if (!SSL_CTX_set_client_cert_engine(ctx, ssl_client_engine)) {
1797            BIO_puts(bio_err, "Error setting client auth engine\n");
1798            ERR_print_errors(bio_err);
1799            ENGINE_free(ssl_client_engine);
1800            goto end;
1801        }
1802        ENGINE_free(ssl_client_engine);
1803    }
1804#endif
1805
1806#ifndef OPENSSL_NO_PSK
1807    if (psk_key != NULL) {
1808        if (c_debug)
1809            BIO_printf(bio_c_out, "PSK key given, setting client callback\n");
1810        SSL_CTX_set_psk_client_callback(ctx, psk_client_cb);
1811    }
1812#endif
1813    if (psksessf != NULL) {
1814        BIO *stmp = BIO_new_file(psksessf, "r");
1815
1816        if (stmp == NULL) {
1817            BIO_printf(bio_err, "Can't open PSK session file %s\n", psksessf);
1818            ERR_print_errors(bio_err);
1819            goto end;
1820        }
1821        psksess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
1822        BIO_free(stmp);
1823        if (psksess == NULL) {
1824            BIO_printf(bio_err, "Can't read PSK session file %s\n", psksessf);
1825            ERR_print_errors(bio_err);
1826            goto end;
1827        }
1828    }
1829    if (psk_key != NULL || psksess != NULL)
1830        SSL_CTX_set_psk_use_session_callback(ctx, psk_use_session_cb);
1831
1832#ifndef OPENSSL_NO_SRTP
1833    if (srtp_profiles != NULL) {
1834        /* Returns 0 on success! */
1835        if (SSL_CTX_set_tlsext_use_srtp(ctx, srtp_profiles) != 0) {
1836            BIO_printf(bio_err, "Error setting SRTP profile\n");
1837            ERR_print_errors(bio_err);
1838            goto end;
1839        }
1840    }
1841#endif
1842
1843    if (exc != NULL)
1844        ssl_ctx_set_excert(ctx, exc);
1845
1846#if !defined(OPENSSL_NO_NEXTPROTONEG)
1847    if (next_proto.data != NULL)
1848        SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &next_proto);
1849#endif
1850    if (alpn_in) {
1851        size_t alpn_len;
1852        unsigned char *alpn = next_protos_parse(&alpn_len, alpn_in);
1853
1854        if (alpn == NULL) {
1855            BIO_printf(bio_err, "Error parsing -alpn argument\n");
1856            goto end;
1857        }
1858        /* Returns 0 on success! */
1859        if (SSL_CTX_set_alpn_protos(ctx, alpn, alpn_len) != 0) {
1860            BIO_printf(bio_err, "Error setting ALPN\n");
1861            goto end;
1862        }
1863        OPENSSL_free(alpn);
1864    }
1865
1866    for (i = 0; i < serverinfo_count; i++) {
1867        if (!SSL_CTX_add_client_custom_ext(ctx,
1868                                           serverinfo_types[i],
1869                                           NULL, NULL, NULL,
1870                                           serverinfo_cli_parse_cb, NULL)) {
1871            BIO_printf(bio_err,
1872                       "Warning: Unable to add custom extension %u, skipping\n",
1873                       serverinfo_types[i]);
1874        }
1875    }
1876
1877    if (state)
1878        SSL_CTX_set_info_callback(ctx, apps_ssl_info_callback);
1879
1880#ifndef OPENSSL_NO_CT
1881    /* Enable SCT processing, without early connection termination */
1882    if (ct_validation &&
1883        !SSL_CTX_enable_ct(ctx, SSL_CT_VALIDATION_PERMISSIVE)) {
1884        ERR_print_errors(bio_err);
1885        goto end;
1886    }
1887
1888    if (!ctx_set_ctlog_list_file(ctx, ctlog_file)) {
1889        if (ct_validation) {
1890            ERR_print_errors(bio_err);
1891            goto end;
1892        }
1893
1894        /*
1895         * If CT validation is not enabled, the log list isn't needed so don't
1896         * show errors or abort. We try to load it regardless because then we
1897         * can show the names of the logs any SCTs came from (SCTs may be seen
1898         * even with validation disabled).
1899         */
1900        ERR_clear_error();
1901    }
1902#endif
1903
1904    SSL_CTX_set_verify(ctx, verify, verify_callback);
1905
1906    if (!ctx_set_verify_locations(ctx, CAfile, CApath, noCAfile, noCApath)) {
1907        ERR_print_errors(bio_err);
1908        goto end;
1909    }
1910
1911    ssl_ctx_add_crls(ctx, crls, crl_download);
1912
1913    if (!set_cert_key_stuff(ctx, cert, key, chain, build_chain))
1914        goto end;
1915
1916    if (!noservername) {
1917        tlsextcbp.biodebug = bio_err;
1918        SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
1919        SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp);
1920    }
1921# ifndef OPENSSL_NO_SRP
1922    if (srp_arg.srplogin) {
1923        if (!srp_lateuser && !SSL_CTX_set_srp_username(ctx, srp_arg.srplogin)) {
1924            BIO_printf(bio_err, "Unable to set SRP username\n");
1925            goto end;
1926        }
1927        srp_arg.msg = c_msg;
1928        srp_arg.debug = c_debug;
1929        SSL_CTX_set_srp_cb_arg(ctx, &srp_arg);
1930        SSL_CTX_set_srp_client_pwd_callback(ctx, ssl_give_srp_client_pwd_cb);
1931        SSL_CTX_set_srp_strength(ctx, srp_arg.strength);
1932        if (c_msg || c_debug || srp_arg.amp == 0)
1933            SSL_CTX_set_srp_verify_param_callback(ctx,
1934                                                  ssl_srp_verify_param_cb);
1935    }
1936# endif
1937
1938    if (dane_tlsa_domain != NULL) {
1939        if (SSL_CTX_dane_enable(ctx) <= 0) {
1940            BIO_printf(bio_err,
1941                       "%s: Error enabling DANE TLSA authentication.\n",
1942                       prog);
1943            ERR_print_errors(bio_err);
1944            goto end;
1945        }
1946    }
1947
1948    /*
1949     * In TLSv1.3 NewSessionTicket messages arrive after the handshake and can
1950     * come at any time. Therefore we use a callback to write out the session
1951     * when we know about it. This approach works for < TLSv1.3 as well.
1952     */
1953    SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_CLIENT
1954                                        | SSL_SESS_CACHE_NO_INTERNAL_STORE);
1955    SSL_CTX_sess_set_new_cb(ctx, new_session_cb);
1956
1957    if (set_keylog_file(ctx, keylog_file))
1958        goto end;
1959
1960    con = SSL_new(ctx);
1961    if (con == NULL)
1962        goto end;
1963
1964    if (enable_pha)
1965        SSL_set_post_handshake_auth(con, 1);
1966
1967    if (sess_in != NULL) {
1968        SSL_SESSION *sess;
1969        BIO *stmp = BIO_new_file(sess_in, "r");
1970        if (stmp == NULL) {
1971            BIO_printf(bio_err, "Can't open session file %s\n", sess_in);
1972            ERR_print_errors(bio_err);
1973            goto end;
1974        }
1975        sess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
1976        BIO_free(stmp);
1977        if (sess == NULL) {
1978            BIO_printf(bio_err, "Can't open session file %s\n", sess_in);
1979            ERR_print_errors(bio_err);
1980            goto end;
1981        }
1982        if (!SSL_set_session(con, sess)) {
1983            BIO_printf(bio_err, "Can't set session\n");
1984            ERR_print_errors(bio_err);
1985            goto end;
1986        }
1987
1988        SSL_SESSION_free(sess);
1989    }
1990
1991    if (fallback_scsv)
1992        SSL_set_mode(con, SSL_MODE_SEND_FALLBACK_SCSV);
1993
1994    if (!noservername && (servername != NULL || dane_tlsa_domain == NULL)) {
1995        if (servername == NULL) {
1996            if(host == NULL || is_dNS_name(host))
1997                servername = (host == NULL) ? "localhost" : host;
1998        }
1999        if (servername != NULL && !SSL_set_tlsext_host_name(con, servername)) {
2000            BIO_printf(bio_err, "Unable to set TLS servername extension.\n");
2001            ERR_print_errors(bio_err);
2002            goto end;
2003        }
2004    }
2005
2006    if (dane_tlsa_domain != NULL) {
2007        if (SSL_dane_enable(con, dane_tlsa_domain) <= 0) {
2008            BIO_printf(bio_err, "%s: Error enabling DANE TLSA "
2009                       "authentication.\n", prog);
2010            ERR_print_errors(bio_err);
2011            goto end;
2012        }
2013        if (dane_tlsa_rrset == NULL) {
2014            BIO_printf(bio_err, "%s: DANE TLSA authentication requires at "
2015                       "least one -dane_tlsa_rrdata option.\n", prog);
2016            goto end;
2017        }
2018        if (tlsa_import_rrset(con, dane_tlsa_rrset) <= 0) {
2019            BIO_printf(bio_err, "%s: Failed to import any TLSA "
2020                       "records.\n", prog);
2021            goto end;
2022        }
2023        if (dane_ee_no_name)
2024            SSL_dane_set_flags(con, DANE_FLAG_NO_DANE_EE_NAMECHECKS);
2025    } else if (dane_tlsa_rrset != NULL) {
2026        BIO_printf(bio_err, "%s: DANE TLSA authentication requires the "
2027                   "-dane_tlsa_domain option.\n", prog);
2028        goto end;
2029    }
2030
2031 re_start:
2032    if (init_client(&s, host, port, bindhost, bindport, socket_family,
2033                    socket_type, protocol) == 0) {
2034        BIO_printf(bio_err, "connect:errno=%d\n", get_last_socket_error());
2035        BIO_closesocket(s);
2036        goto end;
2037    }
2038    BIO_printf(bio_c_out, "CONNECTED(%08X)\n", s);
2039
2040    if (c_nbio) {
2041        if (!BIO_socket_nbio(s, 1)) {
2042            ERR_print_errors(bio_err);
2043            goto end;
2044        }
2045        BIO_printf(bio_c_out, "Turned on non blocking io\n");
2046    }
2047#ifndef OPENSSL_NO_DTLS
2048    if (isdtls) {
2049        union BIO_sock_info_u peer_info;
2050
2051#ifndef OPENSSL_NO_SCTP
2052        if (protocol == IPPROTO_SCTP)
2053            sbio = BIO_new_dgram_sctp(s, BIO_NOCLOSE);
2054        else
2055#endif
2056            sbio = BIO_new_dgram(s, BIO_NOCLOSE);
2057
2058        if ((peer_info.addr = BIO_ADDR_new()) == NULL) {
2059            BIO_printf(bio_err, "memory allocation failure\n");
2060            BIO_closesocket(s);
2061            goto end;
2062        }
2063        if (!BIO_sock_info(s, BIO_SOCK_INFO_ADDRESS, &peer_info)) {
2064            BIO_printf(bio_err, "getsockname:errno=%d\n",
2065                       get_last_socket_error());
2066            BIO_ADDR_free(peer_info.addr);
2067            BIO_closesocket(s);
2068            goto end;
2069        }
2070
2071        (void)BIO_ctrl_set_connected(sbio, peer_info.addr);
2072        BIO_ADDR_free(peer_info.addr);
2073        peer_info.addr = NULL;
2074
2075        if (enable_timeouts) {
2076            timeout.tv_sec = 0;
2077            timeout.tv_usec = DGRAM_RCV_TIMEOUT;
2078            BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout);
2079
2080            timeout.tv_sec = 0;
2081            timeout.tv_usec = DGRAM_SND_TIMEOUT;
2082            BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout);
2083        }
2084
2085        if (socket_mtu) {
2086            if (socket_mtu < DTLS_get_link_min_mtu(con)) {
2087                BIO_printf(bio_err, "MTU too small. Must be at least %ld\n",
2088                           DTLS_get_link_min_mtu(con));
2089                BIO_free(sbio);
2090                goto shut;
2091            }
2092            SSL_set_options(con, SSL_OP_NO_QUERY_MTU);
2093            if (!DTLS_set_link_mtu(con, socket_mtu)) {
2094                BIO_printf(bio_err, "Failed to set MTU\n");
2095                BIO_free(sbio);
2096                goto shut;
2097            }
2098        } else {
2099            /* want to do MTU discovery */
2100            BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);
2101        }
2102    } else
2103#endif /* OPENSSL_NO_DTLS */
2104        sbio = BIO_new_socket(s, BIO_NOCLOSE);
2105
2106    if (nbio_test) {
2107        BIO *test;
2108
2109        test = BIO_new(BIO_f_nbio_test());
2110        sbio = BIO_push(test, sbio);
2111    }
2112
2113    if (c_debug) {
2114        BIO_set_callback(sbio, bio_dump_callback);
2115        BIO_set_callback_arg(sbio, (char *)bio_c_out);
2116    }
2117    if (c_msg) {
2118#ifndef OPENSSL_NO_SSL_TRACE
2119        if (c_msg == 2)
2120            SSL_set_msg_callback(con, SSL_trace);
2121        else
2122#endif
2123            SSL_set_msg_callback(con, msg_cb);
2124        SSL_set_msg_callback_arg(con, bio_c_msg ? bio_c_msg : bio_c_out);
2125    }
2126
2127    if (c_tlsextdebug) {
2128        SSL_set_tlsext_debug_callback(con, tlsext_cb);
2129        SSL_set_tlsext_debug_arg(con, bio_c_out);
2130    }
2131#ifndef OPENSSL_NO_OCSP
2132    if (c_status_req) {
2133        SSL_set_tlsext_status_type(con, TLSEXT_STATUSTYPE_ocsp);
2134        SSL_CTX_set_tlsext_status_cb(ctx, ocsp_resp_cb);
2135        SSL_CTX_set_tlsext_status_arg(ctx, bio_c_out);
2136    }
2137#endif
2138
2139    SSL_set_bio(con, sbio, sbio);
2140    SSL_set_connect_state(con);
2141
2142    /* ok, lets connect */
2143    if (fileno_stdin() > SSL_get_fd(con))
2144        width = fileno_stdin() + 1;
2145    else
2146        width = SSL_get_fd(con) + 1;
2147
2148    read_tty = 1;
2149    write_tty = 0;
2150    tty_on = 0;
2151    read_ssl = 1;
2152    write_ssl = 1;
2153
2154    cbuf_len = 0;
2155    cbuf_off = 0;
2156    sbuf_len = 0;
2157    sbuf_off = 0;
2158
2159    switch ((PROTOCOL_CHOICE) starttls_proto) {
2160    case PROTO_OFF:
2161        break;
2162    case PROTO_LMTP:
2163    case PROTO_SMTP:
2164        {
2165            /*
2166             * This is an ugly hack that does a lot of assumptions. We do
2167             * have to handle multi-line responses which may come in a single
2168             * packet or not. We therefore have to use BIO_gets() which does
2169             * need a buffering BIO. So during the initial chitchat we do
2170             * push a buffering BIO into the chain that is removed again
2171             * later on to not disturb the rest of the s_client operation.
2172             */
2173            int foundit = 0;
2174            BIO *fbio = BIO_new(BIO_f_buffer());
2175
2176            BIO_push(fbio, sbio);
2177            /* Wait for multi-line response to end from LMTP or SMTP */
2178            do {
2179                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2180            } while (mbuf_len > 3 && mbuf[3] == '-');
2181            if (protohost == NULL)
2182                protohost = "mail.example.com";
2183            if (starttls_proto == (int)PROTO_LMTP)
2184                BIO_printf(fbio, "LHLO %s\r\n", protohost);
2185            else
2186                BIO_printf(fbio, "EHLO %s\r\n", protohost);
2187            (void)BIO_flush(fbio);
2188            /*
2189             * Wait for multi-line response to end LHLO LMTP or EHLO SMTP
2190             * response.
2191             */
2192            do {
2193                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2194                if (strstr(mbuf, "STARTTLS"))
2195                    foundit = 1;
2196            } while (mbuf_len > 3 && mbuf[3] == '-');
2197            (void)BIO_flush(fbio);
2198            BIO_pop(fbio);
2199            BIO_free(fbio);
2200            if (!foundit)
2201                BIO_printf(bio_err,
2202                           "Didn't find STARTTLS in server response,"
2203                           " trying anyway...\n");
2204            BIO_printf(sbio, "STARTTLS\r\n");
2205            BIO_read(sbio, sbuf, BUFSIZZ);
2206        }
2207        break;
2208    case PROTO_POP3:
2209        {
2210            BIO_read(sbio, mbuf, BUFSIZZ);
2211            BIO_printf(sbio, "STLS\r\n");
2212            mbuf_len = BIO_read(sbio, sbuf, BUFSIZZ);
2213            if (mbuf_len < 0) {
2214                BIO_printf(bio_err, "BIO_read failed\n");
2215                goto end;
2216            }
2217        }
2218        break;
2219    case PROTO_IMAP:
2220        {
2221            int foundit = 0;
2222            BIO *fbio = BIO_new(BIO_f_buffer());
2223
2224            BIO_push(fbio, sbio);
2225            BIO_gets(fbio, mbuf, BUFSIZZ);
2226            /* STARTTLS command requires CAPABILITY... */
2227            BIO_printf(fbio, ". CAPABILITY\r\n");
2228            (void)BIO_flush(fbio);
2229            /* wait for multi-line CAPABILITY response */
2230            do {
2231                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2232                if (strstr(mbuf, "STARTTLS"))
2233                    foundit = 1;
2234            }
2235            while (mbuf_len > 3 && mbuf[0] != '.');
2236            (void)BIO_flush(fbio);
2237            BIO_pop(fbio);
2238            BIO_free(fbio);
2239            if (!foundit)
2240                BIO_printf(bio_err,
2241                           "Didn't find STARTTLS in server response,"
2242                           " trying anyway...\n");
2243            BIO_printf(sbio, ". STARTTLS\r\n");
2244            BIO_read(sbio, sbuf, BUFSIZZ);
2245        }
2246        break;
2247    case PROTO_FTP:
2248        {
2249            BIO *fbio = BIO_new(BIO_f_buffer());
2250
2251            BIO_push(fbio, sbio);
2252            /* wait for multi-line response to end from FTP */
2253            do {
2254                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2255            }
2256            while (mbuf_len > 3 && (!isdigit(mbuf[0]) || !isdigit(mbuf[1]) || !isdigit(mbuf[2]) || mbuf[3] != ' '));
2257            (void)BIO_flush(fbio);
2258            BIO_pop(fbio);
2259            BIO_free(fbio);
2260            BIO_printf(sbio, "AUTH TLS\r\n");
2261            BIO_read(sbio, sbuf, BUFSIZZ);
2262        }
2263        break;
2264    case PROTO_XMPP:
2265    case PROTO_XMPP_SERVER:
2266        {
2267            int seen = 0;
2268            BIO_printf(sbio, "<stream:stream "
2269                       "xmlns:stream='http://etherx.jabber.org/streams' "
2270                       "xmlns='jabber:%s' to='%s' version='1.0'>",
2271                       starttls_proto == PROTO_XMPP ? "client" : "server",
2272                       protohost ? protohost : host);
2273            seen = BIO_read(sbio, mbuf, BUFSIZZ);
2274            if (seen < 0) {
2275                BIO_printf(bio_err, "BIO_read failed\n");
2276                goto end;
2277            }
2278            mbuf[seen] = '\0';
2279            while (!strstr
2280                   (mbuf, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'")
2281                   && !strstr(mbuf,
2282                              "<starttls xmlns=\"urn:ietf:params:xml:ns:xmpp-tls\""))
2283            {
2284                seen = BIO_read(sbio, mbuf, BUFSIZZ);
2285
2286                if (seen <= 0)
2287                    goto shut;
2288
2289                mbuf[seen] = '\0';
2290            }
2291            BIO_printf(sbio,
2292                       "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
2293            seen = BIO_read(sbio, sbuf, BUFSIZZ);
2294            if (seen < 0) {
2295                BIO_printf(bio_err, "BIO_read failed\n");
2296                goto shut;
2297            }
2298            sbuf[seen] = '\0';
2299            if (!strstr(sbuf, "<proceed"))
2300                goto shut;
2301            mbuf[0] = '\0';
2302        }
2303        break;
2304    case PROTO_TELNET:
2305        {
2306            static const unsigned char tls_do[] = {
2307                /* IAC    DO   START_TLS */
2308                   255,   253, 46
2309            };
2310            static const unsigned char tls_will[] = {
2311                /* IAC  WILL START_TLS */
2312                   255, 251, 46
2313            };
2314            static const unsigned char tls_follows[] = {
2315                /* IAC  SB   START_TLS FOLLOWS IAC  SE */
2316                   255, 250, 46,       1,      255, 240
2317            };
2318            int bytes;
2319
2320            /* Telnet server should demand we issue START_TLS */
2321            bytes = BIO_read(sbio, mbuf, BUFSIZZ);
2322            if (bytes != 3 || memcmp(mbuf, tls_do, 3) != 0)
2323                goto shut;
2324            /* Agree to issue START_TLS and send the FOLLOWS sub-command */
2325            BIO_write(sbio, tls_will, 3);
2326            BIO_write(sbio, tls_follows, 6);
2327            (void)BIO_flush(sbio);
2328            /* Telnet server also sent the FOLLOWS sub-command */
2329            bytes = BIO_read(sbio, mbuf, BUFSIZZ);
2330            if (bytes != 6 || memcmp(mbuf, tls_follows, 6) != 0)
2331                goto shut;
2332        }
2333        break;
2334    case PROTO_CONNECT:
2335        {
2336            enum {
2337                error_proto,     /* Wrong protocol, not even HTTP */
2338                error_connect,   /* CONNECT failed */
2339                success
2340            } foundit = error_connect;
2341            BIO *fbio = BIO_new(BIO_f_buffer());
2342
2343            BIO_push(fbio, sbio);
2344            BIO_printf(fbio, "CONNECT %s HTTP/1.0\r\n\r\n", connectstr);
2345            (void)BIO_flush(fbio);
2346            /*
2347             * The first line is the HTTP response.  According to RFC 7230,
2348             * it's formatted exactly like this:
2349             *
2350             * HTTP/d.d ddd Reason text\r\n
2351             */
2352            mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2353            if (mbuf_len < (int)strlen("HTTP/1.0 200")) {
2354                BIO_printf(bio_err,
2355                           "%s: HTTP CONNECT failed, insufficient response "
2356                           "from proxy (got %d octets)\n", prog, mbuf_len);
2357                (void)BIO_flush(fbio);
2358                BIO_pop(fbio);
2359                BIO_free(fbio);
2360                goto shut;
2361            }
2362            if (mbuf[8] != ' ') {
2363                BIO_printf(bio_err,
2364                           "%s: HTTP CONNECT failed, incorrect response "
2365                           "from proxy\n", prog);
2366                foundit = error_proto;
2367            } else if (mbuf[9] != '2') {
2368                BIO_printf(bio_err, "%s: HTTP CONNECT failed: %s ", prog,
2369                           &mbuf[9]);
2370            } else {
2371                foundit = success;
2372            }
2373            if (foundit != error_proto) {
2374                /* Read past all following headers */
2375                do {
2376                    mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2377                } while (mbuf_len > 2);
2378            }
2379            (void)BIO_flush(fbio);
2380            BIO_pop(fbio);
2381            BIO_free(fbio);
2382            if (foundit != success) {
2383                goto shut;
2384            }
2385        }
2386        break;
2387    case PROTO_IRC:
2388        {
2389            int numeric;
2390            BIO *fbio = BIO_new(BIO_f_buffer());
2391
2392            BIO_push(fbio, sbio);
2393            BIO_printf(fbio, "STARTTLS\r\n");
2394            (void)BIO_flush(fbio);
2395            width = SSL_get_fd(con) + 1;
2396
2397            do {
2398                numeric = 0;
2399
2400                FD_ZERO(&readfds);
2401                openssl_fdset(SSL_get_fd(con), &readfds);
2402                timeout.tv_sec = S_CLIENT_IRC_READ_TIMEOUT;
2403                timeout.tv_usec = 0;
2404                /*
2405                 * If the IRCd doesn't respond within
2406                 * S_CLIENT_IRC_READ_TIMEOUT seconds, assume
2407                 * it doesn't support STARTTLS. Many IRCds
2408                 * will not give _any_ sort of response to a
2409                 * STARTTLS command when it's not supported.
2410                 */
2411                if (!BIO_get_buffer_num_lines(fbio)
2412                    && !BIO_pending(fbio)
2413                    && !BIO_pending(sbio)
2414                    && select(width, (void *)&readfds, NULL, NULL,
2415                              &timeout) < 1) {
2416                    BIO_printf(bio_err,
2417                               "Timeout waiting for response (%d seconds).\n",
2418                               S_CLIENT_IRC_READ_TIMEOUT);
2419                    break;
2420                }
2421
2422                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2423                if (mbuf_len < 1 || sscanf(mbuf, "%*s %d", &numeric) != 1)
2424                    break;
2425                /* :example.net 451 STARTTLS :You have not registered */
2426                /* :example.net 421 STARTTLS :Unknown command */
2427                if ((numeric == 451 || numeric == 421)
2428                    && strstr(mbuf, "STARTTLS") != NULL) {
2429                    BIO_printf(bio_err, "STARTTLS not supported: %s", mbuf);
2430                    break;
2431                }
2432                if (numeric == 691) {
2433                    BIO_printf(bio_err, "STARTTLS negotiation failed: ");
2434                    ERR_print_errors(bio_err);
2435                    break;
2436                }
2437            } while (numeric != 670);
2438
2439            (void)BIO_flush(fbio);
2440            BIO_pop(fbio);
2441            BIO_free(fbio);
2442            if (numeric != 670) {
2443                BIO_printf(bio_err, "Server does not support STARTTLS.\n");
2444                ret = 1;
2445                goto shut;
2446            }
2447        }
2448        break;
2449    case PROTO_MYSQL:
2450        {
2451            /* SSL request packet */
2452            static const unsigned char ssl_req[] = {
2453                /* payload_length,   sequence_id */
2454                   0x20, 0x00, 0x00, 0x01,
2455                /* payload */
2456                /* capability flags, CLIENT_SSL always set */
2457                   0x85, 0xae, 0x7f, 0x00,
2458                /* max-packet size */
2459                   0x00, 0x00, 0x00, 0x01,
2460                /* character set */
2461                   0x21,
2462                /* string[23] reserved (all [0]) */
2463                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
2464                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
2465                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
2466            };
2467            int bytes = 0;
2468            int ssl_flg = 0x800;
2469            int pos;
2470            const unsigned char *packet = (const unsigned char *)sbuf;
2471
2472            /* Receiving Initial Handshake packet. */
2473            bytes = BIO_read(sbio, (void *)packet, BUFSIZZ);
2474            if (bytes < 0) {
2475                BIO_printf(bio_err, "BIO_read failed\n");
2476                goto shut;
2477            /* Packet length[3], Packet number[1] + minimum payload[17] */
2478            } else if (bytes < 21) {
2479                BIO_printf(bio_err, "MySQL packet too short.\n");
2480                goto shut;
2481            } else if (bytes != (4 + packet[0] +
2482                                 (packet[1] << 8) +
2483                                 (packet[2] << 16))) {
2484                BIO_printf(bio_err, "MySQL packet length does not match.\n");
2485                goto shut;
2486            /* protocol version[1] */
2487            } else if (packet[4] != 0xA) {
2488                BIO_printf(bio_err,
2489                           "Only MySQL protocol version 10 is supported.\n");
2490                goto shut;
2491            }
2492
2493            pos = 5;
2494            /* server version[string+NULL] */
2495            for (;;) {
2496                if (pos >= bytes) {
2497                    BIO_printf(bio_err, "Cannot confirm server version. ");
2498                    goto shut;
2499                } else if (packet[pos++] == '\0') {
2500                    break;
2501                }
2502            }
2503
2504            /* make sure we have at least 15 bytes left in the packet */
2505            if (pos + 15 > bytes) {
2506                BIO_printf(bio_err,
2507                           "MySQL server handshake packet is broken.\n");
2508                goto shut;
2509            }
2510
2511            pos += 12; /* skip over conn id[4] + SALT[8] */
2512            if (packet[pos++] != '\0') { /* verify filler */
2513                BIO_printf(bio_err,
2514                           "MySQL packet is broken.\n");
2515                goto shut;
2516            }
2517
2518            /* capability flags[2] */
2519            if (!((packet[pos] + (packet[pos + 1] << 8)) & ssl_flg)) {
2520                BIO_printf(bio_err, "MySQL server does not support SSL.\n");
2521                goto shut;
2522            }
2523
2524            /* Sending SSL Handshake packet. */
2525            BIO_write(sbio, ssl_req, sizeof(ssl_req));
2526            (void)BIO_flush(sbio);
2527        }
2528        break;
2529    case PROTO_POSTGRES:
2530        {
2531            static const unsigned char ssl_request[] = {
2532                /* Length        SSLRequest */
2533                   0, 0, 0, 8,   4, 210, 22, 47
2534            };
2535            int bytes;
2536
2537            /* Send SSLRequest packet */
2538            BIO_write(sbio, ssl_request, 8);
2539            (void)BIO_flush(sbio);
2540
2541            /* Reply will be a single S if SSL is enabled */
2542            bytes = BIO_read(sbio, sbuf, BUFSIZZ);
2543            if (bytes != 1 || sbuf[0] != 'S')
2544                goto shut;
2545        }
2546        break;
2547    case PROTO_NNTP:
2548        {
2549            int foundit = 0;
2550            BIO *fbio = BIO_new(BIO_f_buffer());
2551
2552            BIO_push(fbio, sbio);
2553            BIO_gets(fbio, mbuf, BUFSIZZ);
2554            /* STARTTLS command requires CAPABILITIES... */
2555            BIO_printf(fbio, "CAPABILITIES\r\n");
2556            (void)BIO_flush(fbio);
2557            /* wait for multi-line CAPABILITIES response */
2558            do {
2559                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2560                if (strstr(mbuf, "STARTTLS"))
2561                    foundit = 1;
2562            } while (mbuf_len > 1 && mbuf[0] != '.');
2563            (void)BIO_flush(fbio);
2564            BIO_pop(fbio);
2565            BIO_free(fbio);
2566            if (!foundit)
2567                BIO_printf(bio_err,
2568                           "Didn't find STARTTLS in server response,"
2569                           " trying anyway...\n");
2570            BIO_printf(sbio, "STARTTLS\r\n");
2571            mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
2572            if (mbuf_len < 0) {
2573                BIO_printf(bio_err, "BIO_read failed\n");
2574                goto end;
2575            }
2576            mbuf[mbuf_len] = '\0';
2577            if (strstr(mbuf, "382") == NULL) {
2578                BIO_printf(bio_err, "STARTTLS failed: %s", mbuf);
2579                goto shut;
2580            }
2581        }
2582        break;
2583    case PROTO_SIEVE:
2584        {
2585            int foundit = 0;
2586            BIO *fbio = BIO_new(BIO_f_buffer());
2587
2588            BIO_push(fbio, sbio);
2589            /* wait for multi-line response to end from Sieve */
2590            do {
2591                mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2592                /*
2593                 * According to RFC 5804 �� 1.7, capability
2594                 * is case-insensitive, make it uppercase
2595                 */
2596                if (mbuf_len > 1 && mbuf[0] == '"') {
2597                    make_uppercase(mbuf);
2598                    if (strncmp(mbuf, "\"STARTTLS\"", 10) == 0)
2599                        foundit = 1;
2600                }
2601            } while (mbuf_len > 1 && mbuf[0] == '"');
2602            (void)BIO_flush(fbio);
2603            BIO_pop(fbio);
2604            BIO_free(fbio);
2605            if (!foundit)
2606                BIO_printf(bio_err,
2607                           "Didn't find STARTTLS in server response,"
2608                           " trying anyway...\n");
2609            BIO_printf(sbio, "STARTTLS\r\n");
2610            mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
2611            if (mbuf_len < 0) {
2612                BIO_printf(bio_err, "BIO_read failed\n");
2613                goto end;
2614            }
2615            mbuf[mbuf_len] = '\0';
2616            if (mbuf_len < 2) {
2617                BIO_printf(bio_err, "STARTTLS failed: %s", mbuf);
2618                goto shut;
2619            }
2620            /*
2621             * According to RFC 5804 �� 2.2, response codes are case-
2622             * insensitive, make it uppercase but preserve the response.
2623             */
2624            strncpy(sbuf, mbuf, 2);
2625            make_uppercase(sbuf);
2626            if (strncmp(sbuf, "OK", 2) != 0) {
2627                BIO_printf(bio_err, "STARTTLS not supported: %s", mbuf);
2628                goto shut;
2629            }
2630        }
2631        break;
2632    case PROTO_LDAP:
2633        {
2634            /* StartTLS Operation according to RFC 4511 */
2635            static char ldap_tls_genconf[] = "asn1=SEQUENCE:LDAPMessage\n"
2636                "[LDAPMessage]\n"
2637                "messageID=INTEGER:1\n"
2638                "extendedReq=EXPLICIT:23A,IMPLICIT:0C,"
2639                "FORMAT:ASCII,OCT:1.3.6.1.4.1.1466.20037\n";
2640            long errline = -1;
2641            char *genstr = NULL;
2642            int result = -1;
2643            ASN1_TYPE *atyp = NULL;
2644            BIO *ldapbio = BIO_new(BIO_s_mem());
2645            CONF *cnf = NCONF_new(NULL);
2646
2647            if (cnf == NULL) {
2648                BIO_free(ldapbio);
2649                goto end;
2650            }
2651            BIO_puts(ldapbio, ldap_tls_genconf);
2652            if (NCONF_load_bio(cnf, ldapbio, &errline) <= 0) {
2653                BIO_free(ldapbio);
2654                NCONF_free(cnf);
2655                if (errline <= 0) {
2656                    BIO_printf(bio_err, "NCONF_load_bio failed\n");
2657                    goto end;
2658                } else {
2659                    BIO_printf(bio_err, "Error on line %ld\n", errline);
2660                    goto end;
2661                }
2662            }
2663            BIO_free(ldapbio);
2664            genstr = NCONF_get_string(cnf, "default", "asn1");
2665            if (genstr == NULL) {
2666                NCONF_free(cnf);
2667                BIO_printf(bio_err, "NCONF_get_string failed\n");
2668                goto end;
2669            }
2670            atyp = ASN1_generate_nconf(genstr, cnf);
2671            if (atyp == NULL) {
2672                NCONF_free(cnf);
2673                BIO_printf(bio_err, "ASN1_generate_nconf failed\n");
2674                goto end;
2675            }
2676            NCONF_free(cnf);
2677
2678            /* Send SSLRequest packet */
2679            BIO_write(sbio, atyp->value.sequence->data,
2680                      atyp->value.sequence->length);
2681            (void)BIO_flush(sbio);
2682            ASN1_TYPE_free(atyp);
2683
2684            mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
2685            if (mbuf_len < 0) {
2686                BIO_printf(bio_err, "BIO_read failed\n");
2687                goto end;
2688            }
2689            result = ldap_ExtendedResponse_parse(mbuf, mbuf_len);
2690            if (result < 0) {
2691                BIO_printf(bio_err, "ldap_ExtendedResponse_parse failed\n");
2692                goto shut;
2693            } else if (result > 0) {
2694                BIO_printf(bio_err, "STARTTLS failed, LDAP Result Code: %i\n",
2695                           result);
2696                goto shut;
2697            }
2698            mbuf_len = 0;
2699        }
2700        break;
2701    }
2702
2703    if (early_data_file != NULL
2704            && ((SSL_get0_session(con) != NULL
2705                 && SSL_SESSION_get_max_early_data(SSL_get0_session(con)) > 0)
2706                || (psksess != NULL
2707                    && SSL_SESSION_get_max_early_data(psksess) > 0))) {
2708        BIO *edfile = BIO_new_file(early_data_file, "r");
2709        size_t readbytes, writtenbytes;
2710        int finish = 0;
2711
2712        if (edfile == NULL) {
2713            BIO_printf(bio_err, "Cannot open early data file\n");
2714            goto shut;
2715        }
2716
2717        while (!finish) {
2718            if (!BIO_read_ex(edfile, cbuf, BUFSIZZ, &readbytes))
2719                finish = 1;
2720
2721            while (!SSL_write_early_data(con, cbuf, readbytes, &writtenbytes)) {
2722                switch (SSL_get_error(con, 0)) {
2723                case SSL_ERROR_WANT_WRITE:
2724                case SSL_ERROR_WANT_ASYNC:
2725                case SSL_ERROR_WANT_READ:
2726                    /* Just keep trying - busy waiting */
2727                    continue;
2728                default:
2729                    BIO_printf(bio_err, "Error writing early data\n");
2730                    BIO_free(edfile);
2731                    ERR_print_errors(bio_err);
2732                    goto shut;
2733                }
2734            }
2735        }
2736
2737        BIO_free(edfile);
2738    }
2739
2740    for (;;) {
2741        FD_ZERO(&readfds);
2742        FD_ZERO(&writefds);
2743
2744        if (SSL_is_dtls(con) && DTLSv1_get_timeout(con, &timeout))
2745            timeoutp = &timeout;
2746        else
2747            timeoutp = NULL;
2748
2749        if (!SSL_is_init_finished(con) && SSL_total_renegotiations(con) == 0
2750                && SSL_get_key_update_type(con) == SSL_KEY_UPDATE_NONE) {
2751            in_init = 1;
2752            tty_on = 0;
2753        } else {
2754            tty_on = 1;
2755            if (in_init) {
2756                in_init = 0;
2757
2758                if (c_brief) {
2759                    BIO_puts(bio_err, "CONNECTION ESTABLISHED\n");
2760                    print_ssl_summary(con);
2761                }
2762
2763                print_stuff(bio_c_out, con, full_log);
2764                if (full_log > 0)
2765                    full_log--;
2766
2767                if (starttls_proto) {
2768                    BIO_write(bio_err, mbuf, mbuf_len);
2769                    /* We don't need to know any more */
2770                    if (!reconnect)
2771                        starttls_proto = PROTO_OFF;
2772                }
2773
2774                if (reconnect) {
2775                    reconnect--;
2776                    BIO_printf(bio_c_out,
2777                               "drop connection and then reconnect\n");
2778                    do_ssl_shutdown(con);
2779                    SSL_set_connect_state(con);
2780                    BIO_closesocket(SSL_get_fd(con));
2781                    goto re_start;
2782                }
2783            }
2784        }
2785
2786        ssl_pending = read_ssl && SSL_has_pending(con);
2787
2788        if (!ssl_pending) {
2789#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
2790            if (tty_on) {
2791                /*
2792                 * Note that select() returns when read _would not block_,
2793                 * and EOF satisfies that.  To avoid a CPU-hogging loop,
2794                 * set the flag so we exit.
2795                 */
2796                if (read_tty && !at_eof)
2797                    openssl_fdset(fileno_stdin(), &readfds);
2798#if !defined(OPENSSL_SYS_VMS)
2799                if (write_tty)
2800                    openssl_fdset(fileno_stdout(), &writefds);
2801#endif
2802            }
2803            if (read_ssl)
2804                openssl_fdset(SSL_get_fd(con), &readfds);
2805            if (write_ssl)
2806                openssl_fdset(SSL_get_fd(con), &writefds);
2807#else
2808            if (!tty_on || !write_tty) {
2809                if (read_ssl)
2810                    openssl_fdset(SSL_get_fd(con), &readfds);
2811                if (write_ssl)
2812                    openssl_fdset(SSL_get_fd(con), &writefds);
2813            }
2814#endif
2815
2816            /*
2817             * Note: under VMS with SOCKETSHR the second parameter is
2818             * currently of type (int *) whereas under other systems it is
2819             * (void *) if you don't have a cast it will choke the compiler:
2820             * if you do have a cast then you can either go for (int *) or
2821             * (void *).
2822             */
2823#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
2824            /*
2825             * Under Windows/DOS we make the assumption that we can always
2826             * write to the tty: therefore if we need to write to the tty we
2827             * just fall through. Otherwise we timeout the select every
2828             * second and see if there are any keypresses. Note: this is a
2829             * hack, in a proper Windows application we wouldn't do this.
2830             */
2831            i = 0;
2832            if (!write_tty) {
2833                if (read_tty) {
2834                    tv.tv_sec = 1;
2835                    tv.tv_usec = 0;
2836                    i = select(width, (void *)&readfds, (void *)&writefds,
2837                               NULL, &tv);
2838                    if (!i && (!has_stdin_waiting() || !read_tty))
2839                        continue;
2840                } else
2841                    i = select(width, (void *)&readfds, (void *)&writefds,
2842                               NULL, timeoutp);
2843            }
2844#else
2845            i = select(width, (void *)&readfds, (void *)&writefds,
2846                       NULL, timeoutp);
2847#endif
2848            if (i < 0) {
2849                BIO_printf(bio_err, "bad select %d\n",
2850                           get_last_socket_error());
2851                goto shut;
2852            }
2853        }
2854
2855        if (SSL_is_dtls(con) && DTLSv1_handle_timeout(con) > 0)
2856            BIO_printf(bio_err, "TIMEOUT occurred\n");
2857
2858        if (!ssl_pending && FD_ISSET(SSL_get_fd(con), &writefds)) {
2859            k = SSL_write(con, &(cbuf[cbuf_off]), (unsigned int)cbuf_len);
2860            switch (SSL_get_error(con, k)) {
2861            case SSL_ERROR_NONE:
2862                cbuf_off += k;
2863                cbuf_len -= k;
2864                if (k <= 0)
2865                    goto end;
2866                /* we have done a  write(con,NULL,0); */
2867                if (cbuf_len <= 0) {
2868                    read_tty = 1;
2869                    write_ssl = 0;
2870                } else {        /* if (cbuf_len > 0) */
2871
2872                    read_tty = 0;
2873                    write_ssl = 1;
2874                }
2875                break;
2876            case SSL_ERROR_WANT_WRITE:
2877                BIO_printf(bio_c_out, "write W BLOCK\n");
2878                write_ssl = 1;
2879                read_tty = 0;
2880                break;
2881            case SSL_ERROR_WANT_ASYNC:
2882                BIO_printf(bio_c_out, "write A BLOCK\n");
2883                wait_for_async(con);
2884                write_ssl = 1;
2885                read_tty = 0;
2886                break;
2887            case SSL_ERROR_WANT_READ:
2888                BIO_printf(bio_c_out, "write R BLOCK\n");
2889                write_tty = 0;
2890                read_ssl = 1;
2891                write_ssl = 0;
2892                break;
2893            case SSL_ERROR_WANT_X509_LOOKUP:
2894                BIO_printf(bio_c_out, "write X BLOCK\n");
2895                break;
2896            case SSL_ERROR_ZERO_RETURN:
2897                if (cbuf_len != 0) {
2898                    BIO_printf(bio_c_out, "shutdown\n");
2899                    ret = 0;
2900                    goto shut;
2901                } else {
2902                    read_tty = 1;
2903                    write_ssl = 0;
2904                    break;
2905                }
2906
2907            case SSL_ERROR_SYSCALL:
2908                if ((k != 0) || (cbuf_len != 0)) {
2909                    BIO_printf(bio_err, "write:errno=%d\n",
2910                               get_last_socket_error());
2911                    goto shut;
2912                } else {
2913                    read_tty = 1;
2914                    write_ssl = 0;
2915                }
2916                break;
2917            case SSL_ERROR_WANT_ASYNC_JOB:
2918                /* This shouldn't ever happen in s_client - treat as an error */
2919            case SSL_ERROR_SSL:
2920                ERR_print_errors(bio_err);
2921                goto shut;
2922            }
2923        }
2924#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VMS)
2925        /* Assume Windows/DOS/BeOS can always write */
2926        else if (!ssl_pending && write_tty)
2927#else
2928        else if (!ssl_pending && FD_ISSET(fileno_stdout(), &writefds))
2929#endif
2930        {
2931#ifdef CHARSET_EBCDIC
2932            ascii2ebcdic(&(sbuf[sbuf_off]), &(sbuf[sbuf_off]), sbuf_len);
2933#endif
2934            i = raw_write_stdout(&(sbuf[sbuf_off]), sbuf_len);
2935
2936            if (i <= 0) {
2937                BIO_printf(bio_c_out, "DONE\n");
2938                ret = 0;
2939                goto shut;
2940            }
2941
2942            sbuf_len -= i;
2943            sbuf_off += i;
2944            if (sbuf_len <= 0) {
2945                read_ssl = 1;
2946                write_tty = 0;
2947            }
2948        } else if (ssl_pending || FD_ISSET(SSL_get_fd(con), &readfds)) {
2949#ifdef RENEG
2950            {
2951                static int iiii;
2952                if (++iiii == 52) {
2953                    SSL_renegotiate(con);
2954                    iiii = 0;
2955                }
2956            }
2957#endif
2958            k = SSL_read(con, sbuf, 1024 /* BUFSIZZ */ );
2959
2960            switch (SSL_get_error(con, k)) {
2961            case SSL_ERROR_NONE:
2962                if (k <= 0)
2963                    goto end;
2964                sbuf_off = 0;
2965                sbuf_len = k;
2966
2967                read_ssl = 0;
2968                write_tty = 1;
2969                break;
2970            case SSL_ERROR_WANT_ASYNC:
2971                BIO_printf(bio_c_out, "read A BLOCK\n");
2972                wait_for_async(con);
2973                write_tty = 0;
2974                read_ssl = 1;
2975                if ((read_tty == 0) && (write_ssl == 0))
2976                    write_ssl = 1;
2977                break;
2978            case SSL_ERROR_WANT_WRITE:
2979                BIO_printf(bio_c_out, "read W BLOCK\n");
2980                write_ssl = 1;
2981                read_tty = 0;
2982                break;
2983            case SSL_ERROR_WANT_READ:
2984                BIO_printf(bio_c_out, "read R BLOCK\n");
2985                write_tty = 0;
2986                read_ssl = 1;
2987                if ((read_tty == 0) && (write_ssl == 0))
2988                    write_ssl = 1;
2989                break;
2990            case SSL_ERROR_WANT_X509_LOOKUP:
2991                BIO_printf(bio_c_out, "read X BLOCK\n");
2992                break;
2993            case SSL_ERROR_SYSCALL:
2994                ret = get_last_socket_error();
2995                if (c_brief)
2996                    BIO_puts(bio_err, "CONNECTION CLOSED BY SERVER\n");
2997                else
2998                    BIO_printf(bio_err, "read:errno=%d\n", ret);
2999                goto shut;
3000            case SSL_ERROR_ZERO_RETURN:
3001                BIO_printf(bio_c_out, "closed\n");
3002                ret = 0;
3003                goto shut;
3004            case SSL_ERROR_WANT_ASYNC_JOB:
3005                /* This shouldn't ever happen in s_client. Treat as an error */
3006            case SSL_ERROR_SSL:
3007                ERR_print_errors(bio_err);
3008                goto shut;
3009            }
3010        }
3011/* OPENSSL_SYS_MSDOS includes OPENSSL_SYS_WINDOWS */
3012#if defined(OPENSSL_SYS_MSDOS)
3013        else if (has_stdin_waiting())
3014#else
3015        else if (FD_ISSET(fileno_stdin(), &readfds))
3016#endif
3017        {
3018            if (crlf) {
3019                int j, lf_num;
3020
3021                i = raw_read_stdin(cbuf, BUFSIZZ / 2);
3022                lf_num = 0;
3023                /* both loops are skipped when i <= 0 */
3024                for (j = 0; j < i; j++)
3025                    if (cbuf[j] == '\n')
3026                        lf_num++;
3027                for (j = i - 1; j >= 0; j--) {
3028                    cbuf[j + lf_num] = cbuf[j];
3029                    if (cbuf[j] == '\n') {
3030                        lf_num--;
3031                        i++;
3032                        cbuf[j + lf_num] = '\r';
3033                    }
3034                }
3035                assert(lf_num == 0);
3036            } else
3037                i = raw_read_stdin(cbuf, BUFSIZZ);
3038#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
3039            if (i == 0)
3040                at_eof = 1;
3041#endif
3042
3043            if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q' && cmdletters))) {
3044                BIO_printf(bio_err, "DONE\n");
3045                ret = 0;
3046                goto shut;
3047            }
3048
3049            if ((!c_ign_eof) && (cbuf[0] == 'R' && cmdletters)) {
3050                BIO_printf(bio_err, "RENEGOTIATING\n");
3051                SSL_renegotiate(con);
3052                cbuf_len = 0;
3053	    } else if (!c_ign_eof && (cbuf[0] == 'K' || cbuf[0] == 'k' )
3054                    && cmdletters) {
3055                BIO_printf(bio_err, "KEYUPDATE\n");
3056                SSL_key_update(con,
3057                               cbuf[0] == 'K' ? SSL_KEY_UPDATE_REQUESTED
3058                                              : SSL_KEY_UPDATE_NOT_REQUESTED);
3059                cbuf_len = 0;
3060            }
3061#ifndef OPENSSL_NO_HEARTBEATS
3062            else if ((!c_ign_eof) && (cbuf[0] == 'B' && cmdletters)) {
3063                BIO_printf(bio_err, "HEARTBEATING\n");
3064                SSL_heartbeat(con);
3065                cbuf_len = 0;
3066            }
3067#endif
3068            else {
3069                cbuf_len = i;
3070                cbuf_off = 0;
3071#ifdef CHARSET_EBCDIC
3072                ebcdic2ascii(cbuf, cbuf, i);
3073#endif
3074            }
3075
3076            write_ssl = 1;
3077            read_tty = 0;
3078        }
3079    }
3080
3081    ret = 0;
3082 shut:
3083    if (in_init)
3084        print_stuff(bio_c_out, con, full_log);
3085    do_ssl_shutdown(con);
3086
3087    /*
3088     * If we ended with an alert being sent, but still with data in the
3089     * network buffer to be read, then calling BIO_closesocket() will
3090     * result in a TCP-RST being sent. On some platforms (notably
3091     * Windows) then this will result in the peer immediately abandoning
3092     * the connection including any buffered alert data before it has
3093     * had a chance to be read. Shutting down the sending side first,
3094     * and then closing the socket sends TCP-FIN first followed by
3095     * TCP-RST. This seems to allow the peer to read the alert data.
3096     */
3097    shutdown(SSL_get_fd(con), 1); /* SHUT_WR */
3098    /*
3099     * We just said we have nothing else to say, but it doesn't mean that
3100     * the other side has nothing. It's even recommended to consume incoming
3101     * data. [In testing context this ensures that alerts are passed on...]
3102     */
3103    timeout.tv_sec = 0;
3104    timeout.tv_usec = 500000;  /* some extreme round-trip */
3105    do {
3106        FD_ZERO(&readfds);
3107        openssl_fdset(s, &readfds);
3108    } while (select(s + 1, &readfds, NULL, NULL, &timeout) > 0
3109             && BIO_read(sbio, sbuf, BUFSIZZ) > 0);
3110
3111    BIO_closesocket(SSL_get_fd(con));
3112 end:
3113    if (con != NULL) {
3114        if (prexit != 0)
3115            print_stuff(bio_c_out, con, 1);
3116        SSL_free(con);
3117    }
3118    SSL_SESSION_free(psksess);
3119#if !defined(OPENSSL_NO_NEXTPROTONEG)
3120    OPENSSL_free(next_proto.data);
3121#endif
3122    SSL_CTX_free(ctx);
3123    set_keylog_file(NULL, NULL);
3124    X509_free(cert);
3125    sk_X509_CRL_pop_free(crls, X509_CRL_free);
3126    EVP_PKEY_free(key);
3127    sk_X509_pop_free(chain, X509_free);
3128    OPENSSL_free(pass);
3129#ifndef OPENSSL_NO_SRP
3130    OPENSSL_free(srp_arg.srppassin);
3131#endif
3132    OPENSSL_free(connectstr);
3133    OPENSSL_free(bindstr);
3134    OPENSSL_free(host);
3135    OPENSSL_free(port);
3136    X509_VERIFY_PARAM_free(vpm);
3137    ssl_excert_free(exc);
3138    sk_OPENSSL_STRING_free(ssl_args);
3139    sk_OPENSSL_STRING_free(dane_tlsa_rrset);
3140    SSL_CONF_CTX_free(cctx);
3141    OPENSSL_clear_free(cbuf, BUFSIZZ);
3142    OPENSSL_clear_free(sbuf, BUFSIZZ);
3143    OPENSSL_clear_free(mbuf, BUFSIZZ);
3144    release_engine(e);
3145    BIO_free(bio_c_out);
3146    bio_c_out = NULL;
3147    BIO_free(bio_c_msg);
3148    bio_c_msg = NULL;
3149    return ret;
3150}
3151
3152static void print_stuff(BIO *bio, SSL *s, int full)
3153{
3154    X509 *peer = NULL;
3155    STACK_OF(X509) *sk;
3156    const SSL_CIPHER *c;
3157    int i, istls13 = (SSL_version(s) == TLS1_3_VERSION);
3158    long verify_result;
3159#ifndef OPENSSL_NO_COMP
3160    const COMP_METHOD *comp, *expansion;
3161#endif
3162    unsigned char *exportedkeymat;
3163#ifndef OPENSSL_NO_CT
3164    const SSL_CTX *ctx = SSL_get_SSL_CTX(s);
3165#endif
3166
3167    if (full) {
3168        int got_a_chain = 0;
3169
3170        sk = SSL_get_peer_cert_chain(s);
3171        if (sk != NULL) {
3172            got_a_chain = 1;
3173
3174            BIO_printf(bio, "---\nCertificate chain\n");
3175            for (i = 0; i < sk_X509_num(sk); i++) {
3176                BIO_printf(bio, "%2d s:", i);
3177                X509_NAME_print_ex(bio, X509_get_subject_name(sk_X509_value(sk, i)), 0, get_nameopt());
3178                BIO_puts(bio, "\n");
3179                BIO_printf(bio, "   i:");
3180                X509_NAME_print_ex(bio, X509_get_issuer_name(sk_X509_value(sk, i)), 0, get_nameopt());
3181                BIO_puts(bio, "\n");
3182                if (c_showcerts)
3183                    PEM_write_bio_X509(bio, sk_X509_value(sk, i));
3184            }
3185        }
3186
3187        BIO_printf(bio, "---\n");
3188        peer = SSL_get_peer_certificate(s);
3189        if (peer != NULL) {
3190            BIO_printf(bio, "Server certificate\n");
3191
3192            /* Redundant if we showed the whole chain */
3193            if (!(c_showcerts && got_a_chain))
3194                PEM_write_bio_X509(bio, peer);
3195            dump_cert_text(bio, peer);
3196        } else {
3197            BIO_printf(bio, "no peer certificate available\n");
3198        }
3199        print_ca_names(bio, s);
3200
3201        ssl_print_sigalgs(bio, s);
3202        ssl_print_tmp_key(bio, s);
3203
3204#ifndef OPENSSL_NO_CT
3205        /*
3206         * When the SSL session is anonymous, or resumed via an abbreviated
3207         * handshake, no SCTs are provided as part of the handshake.  While in
3208         * a resumed session SCTs may be present in the session's certificate,
3209         * no callbacks are invoked to revalidate these, and in any case that
3210         * set of SCTs may be incomplete.  Thus it makes little sense to
3211         * attempt to display SCTs from a resumed session's certificate, and of
3212         * course none are associated with an anonymous peer.
3213         */
3214        if (peer != NULL && !SSL_session_reused(s) && SSL_ct_is_enabled(s)) {
3215            const STACK_OF(SCT) *scts = SSL_get0_peer_scts(s);
3216            int sct_count = scts != NULL ? sk_SCT_num(scts) : 0;
3217
3218            BIO_printf(bio, "---\nSCTs present (%i)\n", sct_count);
3219            if (sct_count > 0) {
3220                const CTLOG_STORE *log_store = SSL_CTX_get0_ctlog_store(ctx);
3221
3222                BIO_printf(bio, "---\n");
3223                for (i = 0; i < sct_count; ++i) {
3224                    SCT *sct = sk_SCT_value(scts, i);
3225
3226                    BIO_printf(bio, "SCT validation status: %s\n",
3227                               SCT_validation_status_string(sct));
3228                    SCT_print(sct, bio, 0, log_store);
3229                    if (i < sct_count - 1)
3230                        BIO_printf(bio, "\n---\n");
3231                }
3232                BIO_printf(bio, "\n");
3233            }
3234        }
3235#endif
3236
3237        BIO_printf(bio,
3238                   "---\nSSL handshake has read %ju bytes "
3239                   "and written %ju bytes\n",
3240                   BIO_number_read(SSL_get_rbio(s)),
3241                   BIO_number_written(SSL_get_wbio(s)));
3242    }
3243    print_verify_detail(s, bio);
3244    BIO_printf(bio, (SSL_session_reused(s) ? "---\nReused, " : "---\nNew, "));
3245    c = SSL_get_current_cipher(s);
3246    BIO_printf(bio, "%s, Cipher is %s\n",
3247               SSL_CIPHER_get_version(c), SSL_CIPHER_get_name(c));
3248    if (peer != NULL) {
3249        EVP_PKEY *pktmp;
3250
3251        pktmp = X509_get0_pubkey(peer);
3252        BIO_printf(bio, "Server public key is %d bit\n",
3253                   EVP_PKEY_bits(pktmp));
3254    }
3255    BIO_printf(bio, "Secure Renegotiation IS%s supported\n",
3256               SSL_get_secure_renegotiation_support(s) ? "" : " NOT");
3257#ifndef OPENSSL_NO_COMP
3258    comp = SSL_get_current_compression(s);
3259    expansion = SSL_get_current_expansion(s);
3260    BIO_printf(bio, "Compression: %s\n",
3261               comp ? SSL_COMP_get_name(comp) : "NONE");
3262    BIO_printf(bio, "Expansion: %s\n",
3263               expansion ? SSL_COMP_get_name(expansion) : "NONE");
3264#endif
3265
3266#ifdef SSL_DEBUG
3267    {
3268        /* Print out local port of connection: useful for debugging */
3269        int sock;
3270        union BIO_sock_info_u info;
3271
3272        sock = SSL_get_fd(s);
3273        if ((info.addr = BIO_ADDR_new()) != NULL
3274            && BIO_sock_info(sock, BIO_SOCK_INFO_ADDRESS, &info)) {
3275            BIO_printf(bio_c_out, "LOCAL PORT is %u\n",
3276                       ntohs(BIO_ADDR_rawport(info.addr)));
3277        }
3278        BIO_ADDR_free(info.addr);
3279    }
3280#endif
3281
3282#if !defined(OPENSSL_NO_NEXTPROTONEG)
3283    if (next_proto.status != -1) {
3284        const unsigned char *proto;
3285        unsigned int proto_len;
3286        SSL_get0_next_proto_negotiated(s, &proto, &proto_len);
3287        BIO_printf(bio, "Next protocol: (%d) ", next_proto.status);
3288        BIO_write(bio, proto, proto_len);
3289        BIO_write(bio, "\n", 1);
3290    }
3291#endif
3292    {
3293        const unsigned char *proto;
3294        unsigned int proto_len;
3295        SSL_get0_alpn_selected(s, &proto, &proto_len);
3296        if (proto_len > 0) {
3297            BIO_printf(bio, "ALPN protocol: ");
3298            BIO_write(bio, proto, proto_len);
3299            BIO_write(bio, "\n", 1);
3300        } else
3301            BIO_printf(bio, "No ALPN negotiated\n");
3302    }
3303
3304#ifndef OPENSSL_NO_SRTP
3305    {
3306        SRTP_PROTECTION_PROFILE *srtp_profile =
3307            SSL_get_selected_srtp_profile(s);
3308
3309        if (srtp_profile)
3310            BIO_printf(bio, "SRTP Extension negotiated, profile=%s\n",
3311                       srtp_profile->name);
3312    }
3313#endif
3314
3315    if (istls13) {
3316        switch (SSL_get_early_data_status(s)) {
3317        case SSL_EARLY_DATA_NOT_SENT:
3318            BIO_printf(bio, "Early data was not sent\n");
3319            break;
3320
3321        case SSL_EARLY_DATA_REJECTED:
3322            BIO_printf(bio, "Early data was rejected\n");
3323            break;
3324
3325        case SSL_EARLY_DATA_ACCEPTED:
3326            BIO_printf(bio, "Early data was accepted\n");
3327            break;
3328
3329        }
3330
3331        /*
3332         * We also print the verify results when we dump session information,
3333         * but in TLSv1.3 we may not get that right away (or at all) depending
3334         * on when we get a NewSessionTicket. Therefore we print it now as well.
3335         */
3336        verify_result = SSL_get_verify_result(s);
3337        BIO_printf(bio, "Verify return code: %ld (%s)\n", verify_result,
3338                   X509_verify_cert_error_string(verify_result));
3339    } else {
3340        /* In TLSv1.3 we do this on arrival of a NewSessionTicket */
3341        SSL_SESSION_print(bio, SSL_get_session(s));
3342    }
3343
3344    if (SSL_get_session(s) != NULL && keymatexportlabel != NULL) {
3345        BIO_printf(bio, "Keying material exporter:\n");
3346        BIO_printf(bio, "    Label: '%s'\n", keymatexportlabel);
3347        BIO_printf(bio, "    Length: %i bytes\n", keymatexportlen);
3348        exportedkeymat = app_malloc(keymatexportlen, "export key");
3349        if (!SSL_export_keying_material(s, exportedkeymat,
3350                                        keymatexportlen,
3351                                        keymatexportlabel,
3352                                        strlen(keymatexportlabel),
3353                                        NULL, 0, 0)) {
3354            BIO_printf(bio, "    Error\n");
3355        } else {
3356            BIO_printf(bio, "    Keying material: ");
3357            for (i = 0; i < keymatexportlen; i++)
3358                BIO_printf(bio, "%02X", exportedkeymat[i]);
3359            BIO_printf(bio, "\n");
3360        }
3361        OPENSSL_free(exportedkeymat);
3362    }
3363    BIO_printf(bio, "---\n");
3364    X509_free(peer);
3365    /* flush, or debugging output gets mixed with http response */
3366    (void)BIO_flush(bio);
3367}
3368
3369# ifndef OPENSSL_NO_OCSP
3370static int ocsp_resp_cb(SSL *s, void *arg)
3371{
3372    const unsigned char *p;
3373    int len;
3374    OCSP_RESPONSE *rsp;
3375    len = SSL_get_tlsext_status_ocsp_resp(s, &p);
3376    BIO_puts(arg, "OCSP response: ");
3377    if (p == NULL) {
3378        BIO_puts(arg, "no response sent\n");
3379        return 1;
3380    }
3381    rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
3382    if (rsp == NULL) {
3383        BIO_puts(arg, "response parse error\n");
3384        BIO_dump_indent(arg, (char *)p, len, 4);
3385        return 0;
3386    }
3387    BIO_puts(arg, "\n======================================\n");
3388    OCSP_RESPONSE_print(arg, rsp, 0);
3389    BIO_puts(arg, "======================================\n");
3390    OCSP_RESPONSE_free(rsp);
3391    return 1;
3392}
3393# endif
3394
3395static int ldap_ExtendedResponse_parse(const char *buf, long rem)
3396{
3397    const unsigned char *cur, *end;
3398    long len;
3399    int tag, xclass, inf, ret = -1;
3400
3401    cur = (const unsigned char *)buf;
3402    end = cur + rem;
3403
3404    /*
3405     * From RFC 4511:
3406     *
3407     *    LDAPMessage ::= SEQUENCE {
3408     *         messageID       MessageID,
3409     *         protocolOp      CHOICE {
3410     *              ...
3411     *              extendedResp          ExtendedResponse,
3412     *              ... },
3413     *         controls       [0] Controls OPTIONAL }
3414     *
3415     *    ExtendedResponse ::= [APPLICATION 24] SEQUENCE {
3416     *         COMPONENTS OF LDAPResult,
3417     *         responseName     [10] LDAPOID OPTIONAL,
3418     *         responseValue    [11] OCTET STRING OPTIONAL }
3419     *
3420     *    LDAPResult ::= SEQUENCE {
3421     *         resultCode         ENUMERATED {
3422     *              success                      (0),
3423     *              ...
3424     *              other                        (80),
3425     *              ...  },
3426     *         matchedDN          LDAPDN,
3427     *         diagnosticMessage  LDAPString,
3428     *         referral           [3] Referral OPTIONAL }
3429     */
3430
3431    /* pull SEQUENCE */
3432    inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3433    if (inf != V_ASN1_CONSTRUCTED || tag != V_ASN1_SEQUENCE ||
3434        (rem = end - cur, len > rem)) {
3435        BIO_printf(bio_err, "Unexpected LDAP response\n");
3436        goto end;
3437    }
3438
3439    rem = len;  /* ensure that we don't overstep the SEQUENCE */
3440
3441    /* pull MessageID */
3442    inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3443    if (inf != V_ASN1_UNIVERSAL || tag != V_ASN1_INTEGER ||
3444        (rem = end - cur, len > rem)) {
3445        BIO_printf(bio_err, "No MessageID\n");
3446        goto end;
3447    }
3448
3449    cur += len; /* shall we check for MessageId match or just skip? */
3450
3451    /* pull [APPLICATION 24] */
3452    rem = end - cur;
3453    inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3454    if (inf != V_ASN1_CONSTRUCTED || xclass != V_ASN1_APPLICATION ||
3455        tag != 24) {
3456        BIO_printf(bio_err, "Not ExtendedResponse\n");
3457        goto end;
3458    }
3459
3460    /* pull resultCode */
3461    rem = end - cur;
3462    inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3463    if (inf != V_ASN1_UNIVERSAL || tag != V_ASN1_ENUMERATED || len == 0 ||
3464        (rem = end - cur, len > rem)) {
3465        BIO_printf(bio_err, "Not LDAPResult\n");
3466        goto end;
3467    }
3468
3469    /* len should always be one, but just in case... */
3470    for (ret = 0, inf = 0; inf < len; inf++) {
3471        ret <<= 8;
3472        ret |= cur[inf];
3473    }
3474    /* There is more data, but we don't care... */
3475 end:
3476    return ret;
3477}
3478
3479/*
3480 * Host dNS Name verifier: used for checking that the hostname is in dNS format
3481 * before setting it as SNI
3482 */
3483static int is_dNS_name(const char *host)
3484{
3485    const size_t MAX_LABEL_LENGTH = 63;
3486    size_t i;
3487    int isdnsname = 0;
3488    size_t length = strlen(host);
3489    size_t label_length = 0;
3490    int all_numeric = 1;
3491
3492    /*
3493     * Deviation from strict DNS name syntax, also check names with '_'
3494     * Check DNS name syntax, any '-' or '.' must be internal,
3495     * and on either side of each '.' we can't have a '-' or '.'.
3496     *
3497     * If the name has just one label, we don't consider it a DNS name.
3498     */
3499    for (i = 0; i < length && label_length < MAX_LABEL_LENGTH; ++i) {
3500        char c = host[i];
3501
3502        if ((c >= 'a' && c <= 'z')
3503            || (c >= 'A' && c <= 'Z')
3504            || c == '_') {
3505            label_length += 1;
3506            all_numeric = 0;
3507            continue;
3508        }
3509
3510        if (c >= '0' && c <= '9') {
3511            label_length += 1;
3512            continue;
3513        }
3514
3515        /* Dot and hyphen cannot be first or last. */
3516        if (i > 0 && i < length - 1) {
3517            if (c == '-') {
3518                label_length += 1;
3519                continue;
3520            }
3521            /*
3522             * Next to a dot the preceding and following characters must not be
3523             * another dot or a hyphen.  Otherwise, record that the name is
3524             * plausible, since it has two or more labels.
3525             */
3526            if (c == '.'
3527                && host[i + 1] != '.'
3528                && host[i - 1] != '-'
3529                && host[i + 1] != '-') {
3530                label_length = 0;
3531                isdnsname = 1;
3532                continue;
3533            }
3534        }
3535        isdnsname = 0;
3536        break;
3537    }
3538
3539    /* dNS name must not be all numeric and labels must be shorter than 64 characters. */
3540    isdnsname &= !all_numeric && !(label_length == MAX_LABEL_LENGTH);
3541
3542    return isdnsname;
3543}
3544#endif                          /* OPENSSL_NO_SOCK */
3545