1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 3*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 4*7c478bd9Sstevel@tonic-gate */ 5*7c478bd9Sstevel@tonic-gate 6*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 7*7c478bd9Sstevel@tonic-gate 8*7c478bd9Sstevel@tonic-gate /* 9*7c478bd9Sstevel@tonic-gate * lib/kdb/decrypt_key.c 10*7c478bd9Sstevel@tonic-gate * 11*7c478bd9Sstevel@tonic-gate * Copyright 1990,1991 by the Massachusetts Institute of Technology. 12*7c478bd9Sstevel@tonic-gate * All Rights Reserved. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may 15*7c478bd9Sstevel@tonic-gate * require a specific license from the United States Government. 16*7c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating 17*7c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting. 18*7c478bd9Sstevel@tonic-gate * 19*7c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 20*7c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 21*7c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 22*7c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 23*7c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 24*7c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining 25*7c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 26*7c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label 27*7c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a 28*7c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software. 29*7c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of 30*7c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 31*7c478bd9Sstevel@tonic-gate * or implied warranty. 32*7c478bd9Sstevel@tonic-gate * 33*7c478bd9Sstevel@tonic-gate * 34*7c478bd9Sstevel@tonic-gate * krb5_kdb_encrypt_key(), krb5_kdb_decrypt_key functions 35*7c478bd9Sstevel@tonic-gate */ 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate /* 38*7c478bd9Sstevel@tonic-gate * Copyright (C) 1998 by the FundsXpress, INC. 39*7c478bd9Sstevel@tonic-gate * 40*7c478bd9Sstevel@tonic-gate * All rights reserved. 41*7c478bd9Sstevel@tonic-gate * 42*7c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may require 43*7c478bd9Sstevel@tonic-gate * a specific license from the United States Government. It is the 44*7c478bd9Sstevel@tonic-gate * responsibility of any person or organization contemplating export to 45*7c478bd9Sstevel@tonic-gate * obtain such a license before exporting. 46*7c478bd9Sstevel@tonic-gate * 47*7c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 48*7c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 49*7c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 50*7c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 51*7c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 52*7c478bd9Sstevel@tonic-gate * the name of FundsXpress. not be used in advertising or publicity pertaining 53*7c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 54*7c478bd9Sstevel@tonic-gate * permission. FundsXpress makes no representations about the suitability of 55*7c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 56*7c478bd9Sstevel@tonic-gate * or implied warranty. 57*7c478bd9Sstevel@tonic-gate * 58*7c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 59*7c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 60*7c478bd9Sstevel@tonic-gate * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 61*7c478bd9Sstevel@tonic-gate */ 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate #include "k5-int.h" 64*7c478bd9Sstevel@tonic-gate 65*7c478bd9Sstevel@tonic-gate /* 66*7c478bd9Sstevel@tonic-gate * Decrypt a key from storage in the database. "eblock" is used 67*7c478bd9Sstevel@tonic-gate * to decrypt the key in "in" into "out"; the storage pointed to by "out" 68*7c478bd9Sstevel@tonic-gate * is allocated before use. 69*7c478bd9Sstevel@tonic-gate */ 70*7c478bd9Sstevel@tonic-gate 71*7c478bd9Sstevel@tonic-gate krb5_error_code 72*7c478bd9Sstevel@tonic-gate krb5_dbekd_decrypt_key_data(context, mkey, key_data, dbkey, keysalt) 73*7c478bd9Sstevel@tonic-gate krb5_context context; 74*7c478bd9Sstevel@tonic-gate const krb5_keyblock * mkey; 75*7c478bd9Sstevel@tonic-gate const krb5_key_data * key_data; 76*7c478bd9Sstevel@tonic-gate krb5_keyblock * dbkey; 77*7c478bd9Sstevel@tonic-gate krb5_keysalt * keysalt; 78*7c478bd9Sstevel@tonic-gate { 79*7c478bd9Sstevel@tonic-gate krb5_error_code retval = 0; 80*7c478bd9Sstevel@tonic-gate krb5_int16 tmplen; 81*7c478bd9Sstevel@tonic-gate krb5_octet * ptr; 82*7c478bd9Sstevel@tonic-gate krb5_enc_data cipher; 83*7c478bd9Sstevel@tonic-gate krb5_data plain; 84*7c478bd9Sstevel@tonic-gate 85*7c478bd9Sstevel@tonic-gate ptr = key_data->key_data_contents[0]; 86*7c478bd9Sstevel@tonic-gate 87*7c478bd9Sstevel@tonic-gate if (ptr) { 88*7c478bd9Sstevel@tonic-gate krb5_kdb_decode_int16(ptr, tmplen); 89*7c478bd9Sstevel@tonic-gate ptr += 2; 90*7c478bd9Sstevel@tonic-gate 91*7c478bd9Sstevel@tonic-gate cipher.enctype = ENCTYPE_UNKNOWN; 92*7c478bd9Sstevel@tonic-gate cipher.ciphertext.length = key_data->key_data_length[0]-2; 93*7c478bd9Sstevel@tonic-gate cipher.ciphertext.data = (char *)ptr; /* SUNWresync121 XXX */ 94*7c478bd9Sstevel@tonic-gate plain.length = key_data->key_data_length[0]-2; 95*7c478bd9Sstevel@tonic-gate if ((plain.data = (char *) malloc(plain.length)) == NULL) 96*7c478bd9Sstevel@tonic-gate return(ENOMEM); 97*7c478bd9Sstevel@tonic-gate (void) memset(plain.data, 0, plain.length); 98*7c478bd9Sstevel@tonic-gate 99*7c478bd9Sstevel@tonic-gate if ((retval = krb5_c_decrypt(context, mkey, 0 /* XXX */, 0, 100*7c478bd9Sstevel@tonic-gate &cipher, &plain))) { 101*7c478bd9Sstevel@tonic-gate krb5_xfree(plain.data); 102*7c478bd9Sstevel@tonic-gate return retval; 103*7c478bd9Sstevel@tonic-gate } 104*7c478bd9Sstevel@tonic-gate 105*7c478bd9Sstevel@tonic-gate /* tmplen is the true length of the key. plain.data is the 106*7c478bd9Sstevel@tonic-gate plaintext data length, but it may be padded, since the 107*7c478bd9Sstevel@tonic-gate old-style etypes didn't store the real length. I can check 108*7c478bd9Sstevel@tonic-gate to make sure that there are enough bytes, but I can't do 109*7c478bd9Sstevel@tonic-gate any better than that. */ 110*7c478bd9Sstevel@tonic-gate 111*7c478bd9Sstevel@tonic-gate if (tmplen > plain.length) { 112*7c478bd9Sstevel@tonic-gate krb5_xfree(plain.data); 113*7c478bd9Sstevel@tonic-gate return(KRB5_CRYPTO_INTERNAL); 114*7c478bd9Sstevel@tonic-gate } 115*7c478bd9Sstevel@tonic-gate 116*7c478bd9Sstevel@tonic-gate dbkey->magic = KV5M_KEYBLOCK; 117*7c478bd9Sstevel@tonic-gate dbkey->enctype = key_data->key_data_type[0]; 118*7c478bd9Sstevel@tonic-gate dbkey->length = tmplen; 119*7c478bd9Sstevel@tonic-gate dbkey->contents = (unsigned char *) plain.data; /* SUNWresync121 XXX */ 120*7c478bd9Sstevel@tonic-gate dbkey->dk_list = NULL; 121*7c478bd9Sstevel@tonic-gate dbkey->hKey = CK_INVALID_HANDLE; 122*7c478bd9Sstevel@tonic-gate } 123*7c478bd9Sstevel@tonic-gate 124*7c478bd9Sstevel@tonic-gate /* Decode salt data */ 125*7c478bd9Sstevel@tonic-gate if (keysalt) { 126*7c478bd9Sstevel@tonic-gate if (key_data->key_data_ver == 2) { 127*7c478bd9Sstevel@tonic-gate keysalt->type = key_data->key_data_type[1]; 128*7c478bd9Sstevel@tonic-gate if ((keysalt->data.length = key_data->key_data_length[1])) { 129*7c478bd9Sstevel@tonic-gate if (!(keysalt->data.data=(char *)malloc(keysalt->data.length))){ 130*7c478bd9Sstevel@tonic-gate if (key_data->key_data_contents[0]) { 131*7c478bd9Sstevel@tonic-gate krb5_xfree(dbkey->contents); 132*7c478bd9Sstevel@tonic-gate dbkey->contents = 0; 133*7c478bd9Sstevel@tonic-gate dbkey->length = 0; 134*7c478bd9Sstevel@tonic-gate } 135*7c478bd9Sstevel@tonic-gate return ENOMEM; 136*7c478bd9Sstevel@tonic-gate } 137*7c478bd9Sstevel@tonic-gate memcpy(keysalt->data.data, key_data->key_data_contents[1], 138*7c478bd9Sstevel@tonic-gate (size_t) keysalt->data.length); 139*7c478bd9Sstevel@tonic-gate } else 140*7c478bd9Sstevel@tonic-gate keysalt->data.data = (char *) NULL; 141*7c478bd9Sstevel@tonic-gate } else { 142*7c478bd9Sstevel@tonic-gate keysalt->type = KRB5_KDB_SALTTYPE_NORMAL; 143*7c478bd9Sstevel@tonic-gate keysalt->data.data = (char *) NULL; 144*7c478bd9Sstevel@tonic-gate keysalt->data.length = 0; 145*7c478bd9Sstevel@tonic-gate } 146*7c478bd9Sstevel@tonic-gate } 147*7c478bd9Sstevel@tonic-gate 148*7c478bd9Sstevel@tonic-gate return retval; 149*7c478bd9Sstevel@tonic-gate } 150