1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5_locl.h" 35 36 RCSID("$Id: keyblock.c 15167 2005-05-18 04:21:57Z lha $"); 37 38 void KRB5_LIB_FUNCTION 39 krb5_keyblock_zero(krb5_keyblock *keyblock) 40 { 41 keyblock->keytype = 0; 42 krb5_data_zero(&keyblock->keyvalue); 43 } 44 45 void KRB5_LIB_FUNCTION 46 krb5_free_keyblock_contents(krb5_context context, 47 krb5_keyblock *keyblock) 48 { 49 if(keyblock) { 50 if (keyblock->keyvalue.data != NULL) 51 memset(keyblock->keyvalue.data, 0, keyblock->keyvalue.length); 52 krb5_data_free (&keyblock->keyvalue); 53 keyblock->keytype = ENCTYPE_NULL; 54 } 55 } 56 57 void KRB5_LIB_FUNCTION 58 krb5_free_keyblock(krb5_context context, 59 krb5_keyblock *keyblock) 60 { 61 if(keyblock){ 62 krb5_free_keyblock_contents(context, keyblock); 63 free(keyblock); 64 } 65 } 66 67 krb5_error_code KRB5_LIB_FUNCTION 68 krb5_copy_keyblock_contents (krb5_context context, 69 const krb5_keyblock *inblock, 70 krb5_keyblock *to) 71 { 72 return copy_EncryptionKey(inblock, to); 73 } 74 75 krb5_error_code KRB5_LIB_FUNCTION 76 krb5_copy_keyblock (krb5_context context, 77 const krb5_keyblock *inblock, 78 krb5_keyblock **to) 79 { 80 krb5_keyblock *k; 81 82 k = malloc (sizeof(*k)); 83 if (k == NULL) { 84 krb5_set_error_string(context, "malloc: out of memory"); 85 return ENOMEM; 86 } 87 *to = k; 88 return krb5_copy_keyblock_contents (context, inblock, k); 89 } 90 91 krb5_enctype 92 krb5_keyblock_get_enctype(const krb5_keyblock *block) 93 { 94 return block->keytype; 95 } 96 97 /* 98 * Fill in `key' with key data of type `enctype' from `data' of length 99 * `size'. Key should be freed using krb5_free_keyblock_contents. 100 */ 101 102 krb5_error_code KRB5_LIB_FUNCTION 103 krb5_keyblock_init(krb5_context context, 104 krb5_enctype type, 105 const void *data, 106 size_t size, 107 krb5_keyblock *key) 108 { 109 krb5_error_code ret; 110 size_t len; 111 112 memset(key, 0, sizeof(*key)); 113 114 ret = krb5_enctype_keysize(context, type, &len); 115 if (ret) 116 return ret; 117 118 if (len != size) { 119 krb5_set_error_string(context, "Encryption key %d is %lu bytes " 120 "long, %lu was passed in", 121 type, (unsigned long)len, (unsigned long)size); 122 return KRB5_PROG_ETYPE_NOSUPP; 123 } 124 ret = krb5_data_copy(&key->keyvalue, data, len); 125 if(ret) { 126 krb5_set_error_string(context, "malloc failed: %lu", 127 (unsigned long)len); 128 return ret; 129 } 130 key->keytype = type; 131 132 return 0; 133 } 134