17c478bd9Sstevel@tonic-gate /*
2d7bec57cSShawn Emery * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
37c478bd9Sstevel@tonic-gate * Use is subject to license terms.
47c478bd9Sstevel@tonic-gate */
57c478bd9Sstevel@tonic-gate
67c478bd9Sstevel@tonic-gate /*
77c478bd9Sstevel@tonic-gate * Copyright (C) 1998 by the FundsXpress, INC.
8*55fea89dSDan Cross *
97c478bd9Sstevel@tonic-gate * All rights reserved.
10*55fea89dSDan Cross *
117c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may require
127c478bd9Sstevel@tonic-gate * a specific license from the United States Government. It is the
137c478bd9Sstevel@tonic-gate * responsibility of any person or organization contemplating export to
147c478bd9Sstevel@tonic-gate * obtain such a license before exporting.
15*55fea89dSDan Cross *
167c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
177c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and
187c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright
197c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and
207c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that
217c478bd9Sstevel@tonic-gate * the name of FundsXpress. not be used in advertising or publicity pertaining
227c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior
237c478bd9Sstevel@tonic-gate * permission. FundsXpress makes no representations about the suitability of
247c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express
257c478bd9Sstevel@tonic-gate * or implied warranty.
26*55fea89dSDan Cross *
277c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
287c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
297c478bd9Sstevel@tonic-gate * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
307c478bd9Sstevel@tonic-gate */
317c478bd9Sstevel@tonic-gate
32159d09a2SMark Phalan #include "k5-int.h"
33159d09a2SMark Phalan #include "cksumtypes.h"
34159d09a2SMark Phalan #include "etypes.h"
35159d09a2SMark Phalan #include "dk.h"
36505d05c7Sgtb
37505d05c7Sgtb krb5_error_code KRB5_CALLCONV
krb5_c_make_checksum(krb5_context context,krb5_cksumtype cksumtype,const krb5_keyblock * key,krb5_keyusage usage,const krb5_data * input,krb5_checksum * cksum)38505d05c7Sgtb krb5_c_make_checksum(krb5_context context, krb5_cksumtype cksumtype,
39159d09a2SMark Phalan const krb5_keyblock *key, krb5_keyusage usage,
40159d09a2SMark Phalan const krb5_data *input, krb5_checksum *cksum)
417c478bd9Sstevel@tonic-gate {
427c478bd9Sstevel@tonic-gate int i, e1, e2;
437c478bd9Sstevel@tonic-gate krb5_data data;
447c478bd9Sstevel@tonic-gate krb5_error_code ret = 0;
457c478bd9Sstevel@tonic-gate size_t cksumlen;
467c478bd9Sstevel@tonic-gate
477c478bd9Sstevel@tonic-gate KRB5_LOG0(KRB5_INFO, "krb5_c_make_checksum() start.");
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate for (i=0; i<krb5_cksumtypes_length; i++) {
507c478bd9Sstevel@tonic-gate if (krb5_cksumtypes_list[i].ctype == cksumtype)
517c478bd9Sstevel@tonic-gate break;
527c478bd9Sstevel@tonic-gate }
537c478bd9Sstevel@tonic-gate
547c478bd9Sstevel@tonic-gate if (i == krb5_cksumtypes_length)
557c478bd9Sstevel@tonic-gate return(KRB5_BAD_ENCTYPE);
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate if (krb5_cksumtypes_list[i].keyhash)
58505d05c7Sgtb cksumlen = krb5_cksumtypes_list[i].keyhash->hashsize;
597c478bd9Sstevel@tonic-gate else
60505d05c7Sgtb cksumlen = krb5_cksumtypes_list[i].hash->hashsize;
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate #ifdef _KERNEL
637c478bd9Sstevel@tonic-gate context->kef_cksum_mt = krb5_cksumtypes_list[i].kef_cksum_mt;
647c478bd9Sstevel@tonic-gate #endif
657c478bd9Sstevel@tonic-gate cksum->length = cksumlen;
66159d09a2SMark Phalan
677c478bd9Sstevel@tonic-gate if ((cksum->contents = (krb5_octet *) MALLOC(cksum->length)) == NULL)
687c478bd9Sstevel@tonic-gate return(ENOMEM);
697c478bd9Sstevel@tonic-gate
707c478bd9Sstevel@tonic-gate data.length = cksum->length;
717c478bd9Sstevel@tonic-gate data.data = (char *) cksum->contents;
727c478bd9Sstevel@tonic-gate
737c478bd9Sstevel@tonic-gate if (krb5_cksumtypes_list[i].keyhash) {
747c478bd9Sstevel@tonic-gate /* check if key is compatible */
75159d09a2SMark Phalan
767c478bd9Sstevel@tonic-gate if (krb5_cksumtypes_list[i].keyed_etype) {
77*55fea89dSDan Cross for (e1=0; e1<krb5_enctypes_length; e1++)
787c478bd9Sstevel@tonic-gate if (krb5_enctypes_list[e1].etype ==
797c478bd9Sstevel@tonic-gate krb5_cksumtypes_list[i].keyed_etype)
807c478bd9Sstevel@tonic-gate break;
817c478bd9Sstevel@tonic-gate
82*55fea89dSDan Cross for (e2=0; e2<krb5_enctypes_length; e2++)
837c478bd9Sstevel@tonic-gate if (krb5_enctypes_list[e2].etype == key->enctype)
847c478bd9Sstevel@tonic-gate break;
857c478bd9Sstevel@tonic-gate
86d7bec57cSShawn Emery /*
87d7bec57cSShawn Emery * Solaris Kerberos: The actual key encryption type could be
88d7bec57cSShawn Emery * arbitrary, so the checksum enc type doesn't need to be the same.
89d7bec57cSShawn Emery */
90d7bec57cSShawn Emery if ((e1 == krb5_enctypes_length) || (e2 == krb5_enctypes_length)) {
917c478bd9Sstevel@tonic-gate ret = KRB5_BAD_ENCTYPE;
927c478bd9Sstevel@tonic-gate goto cleanup;
937c478bd9Sstevel@tonic-gate }
947c478bd9Sstevel@tonic-gate }
957c478bd9Sstevel@tonic-gate #ifdef _KERNEL
967c478bd9Sstevel@tonic-gate context->kef_cipher_mt = krb5_enctypes_list[e1].kef_cipher_mt;
977c478bd9Sstevel@tonic-gate context->kef_hash_mt = krb5_enctypes_list[e1].kef_hash_mt;
987c478bd9Sstevel@tonic-gate if (key->kef_key.ck_data == NULL) {
997c478bd9Sstevel@tonic-gate if ((ret = init_key_kef(context->kef_cipher_mt,
1007c478bd9Sstevel@tonic-gate (krb5_keyblock *)key)))
1017c478bd9Sstevel@tonic-gate goto cleanup;
1027c478bd9Sstevel@tonic-gate }
1037c478bd9Sstevel@tonic-gate #else
1047c478bd9Sstevel@tonic-gate if ((ret = init_key_uef(krb_ctx_hSession(context), (krb5_keyblock *)key)))
1057c478bd9Sstevel@tonic-gate return (ret);
1067c478bd9Sstevel@tonic-gate #endif /* _KERNEL */
1077c478bd9Sstevel@tonic-gate
1087c478bd9Sstevel@tonic-gate ret = (*(krb5_cksumtypes_list[i].keyhash->hash))(context, key,
1097c478bd9Sstevel@tonic-gate usage, 0, input, &data);
1107c478bd9Sstevel@tonic-gate } else if (krb5_cksumtypes_list[i].flags & KRB5_CKSUMFLAG_DERIVE) {
1117c478bd9Sstevel@tonic-gate #ifdef _KERNEL
1127c478bd9Sstevel@tonic-gate context->kef_cipher_mt = get_cipher_mech_type(context,
1137c478bd9Sstevel@tonic-gate (krb5_keyblock *)key);
1147c478bd9Sstevel@tonic-gate context->kef_hash_mt = get_hash_mech_type(context,
1157c478bd9Sstevel@tonic-gate (krb5_keyblock *)key);
1167c478bd9Sstevel@tonic-gate /*
1177c478bd9Sstevel@tonic-gate * If the hash_mt is invalid, try using the cksum_mt
1187c478bd9Sstevel@tonic-gate * because "hash" and "checksum" are overloaded terms
1197c478bd9Sstevel@tonic-gate * in some places.
120*55fea89dSDan Cross */
1217c478bd9Sstevel@tonic-gate if (context->kef_hash_mt == CRYPTO_MECH_INVALID)
1227c478bd9Sstevel@tonic-gate context->kef_hash_mt = context->kef_cksum_mt;
1237c478bd9Sstevel@tonic-gate #else
1247c478bd9Sstevel@tonic-gate ret = init_key_uef(krb_ctx_hSession(context), (krb5_keyblock *)key);
1257c478bd9Sstevel@tonic-gate if (ret)
1267c478bd9Sstevel@tonic-gate return (ret);
1277c478bd9Sstevel@tonic-gate #endif /* _KERNEL */
1287c478bd9Sstevel@tonic-gate ret = krb5_dk_make_checksum(context,
1297c478bd9Sstevel@tonic-gate krb5_cksumtypes_list[i].hash,
1307c478bd9Sstevel@tonic-gate key, usage, input, &data);
1317c478bd9Sstevel@tonic-gate } else {
1327c478bd9Sstevel@tonic-gate /*
1337c478bd9Sstevel@tonic-gate * No key is used, hash and cksum are synonymous
1347c478bd9Sstevel@tonic-gate * in this case
1357c478bd9Sstevel@tonic-gate */
1367c478bd9Sstevel@tonic-gate #ifdef _KERNEL
1377c478bd9Sstevel@tonic-gate context->kef_hash_mt = context->kef_cksum_mt;
1387c478bd9Sstevel@tonic-gate #endif /* _KERNEL */
1397c478bd9Sstevel@tonic-gate ret = (*(krb5_cksumtypes_list[i].hash->hash))(context, 1,
1407c478bd9Sstevel@tonic-gate input, &data);
1417c478bd9Sstevel@tonic-gate }
1427c478bd9Sstevel@tonic-gate
1437c478bd9Sstevel@tonic-gate if (!ret) {
1447c478bd9Sstevel@tonic-gate cksum->magic = KV5M_CHECKSUM;
1457c478bd9Sstevel@tonic-gate cksum->checksum_type = cksumtype;
146159d09a2SMark Phalan if (krb5_cksumtypes_list[i].trunc_size) {
147159d09a2SMark Phalan krb5_octet *trunc;
1487c478bd9Sstevel@tonic-gate size_t old_len = cksum->length;
1497c478bd9Sstevel@tonic-gate
1507c478bd9Sstevel@tonic-gate /*
1517c478bd9Sstevel@tonic-gate * Solaris Kerberos:
1527c478bd9Sstevel@tonic-gate * The Kernel does not like 'realloc' (which is what
1537c478bd9Sstevel@tonic-gate * MIT code does here), so we do our own "realloc".
1547c478bd9Sstevel@tonic-gate */
1557c478bd9Sstevel@tonic-gate cksum->length = krb5_cksumtypes_list[i].trunc_size;
1567c478bd9Sstevel@tonic-gate trunc = (krb5_octet *) MALLOC(cksum->length);
1577c478bd9Sstevel@tonic-gate if (trunc) {
1587c478bd9Sstevel@tonic-gate (void) memcpy(trunc, cksum->contents, cksum->length);
1597c478bd9Sstevel@tonic-gate FREE(cksum->contents, old_len);
1607c478bd9Sstevel@tonic-gate cksum->contents = trunc;
1617c478bd9Sstevel@tonic-gate } else {
1627c478bd9Sstevel@tonic-gate ret = ENOMEM;
1637c478bd9Sstevel@tonic-gate }
1647c478bd9Sstevel@tonic-gate }
1657c478bd9Sstevel@tonic-gate }
1667c478bd9Sstevel@tonic-gate
1677c478bd9Sstevel@tonic-gate cleanup:
1687c478bd9Sstevel@tonic-gate if (ret) {
1697c478bd9Sstevel@tonic-gate (void) memset(cksum->contents, 0, cksum->length);
1707c478bd9Sstevel@tonic-gate FREE(cksum->contents, cksum->length);
1717c478bd9Sstevel@tonic-gate cksum->length = 0;
172505d05c7Sgtb cksum->contents = NULL;
1737c478bd9Sstevel@tonic-gate }
1747c478bd9Sstevel@tonic-gate
1757c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_INFO, "krb5_c_make_checksum() end ret = %d\n", ret);
1767c478bd9Sstevel@tonic-gate return(ret);
1777c478bd9Sstevel@tonic-gate }
178