1 /* $OpenBSD: p12_decr.c,v 1.19 2018/05/13 14:22:34 tb Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 1999. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include <string.h> 61 62 #include <openssl/err.h> 63 #include <openssl/pkcs12.h> 64 65 /* Encrypt/Decrypt a buffer based on password and algor, result in a 66 * malloc'ed buffer 67 */ 68 69 unsigned char * 70 PKCS12_pbe_crypt(const X509_ALGOR *algor, const char *pass, int passlen, 71 const unsigned char *in, int inlen, unsigned char **data, int *datalen, 72 int en_de) 73 { 74 unsigned char *out; 75 int outlen, i; 76 EVP_CIPHER_CTX ctx; 77 78 EVP_CIPHER_CTX_init(&ctx); 79 /* Decrypt data */ 80 if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen, 81 algor->parameter, &ctx, en_de)) { 82 out = NULL; 83 PKCS12error(PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR); 84 goto err; 85 } 86 87 if (!(out = malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) { 88 PKCS12error(ERR_R_MALLOC_FAILURE); 89 goto err; 90 } 91 92 if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) { 93 free(out); 94 out = NULL; 95 PKCS12error(ERR_R_EVP_LIB); 96 goto err; 97 } 98 99 outlen = i; 100 if (!EVP_CipherFinal_ex(&ctx, out + i, &i)) { 101 free(out); 102 out = NULL; 103 PKCS12error(PKCS12_R_PKCS12_CIPHERFINAL_ERROR); 104 goto err; 105 } 106 outlen += i; 107 if (datalen) 108 *datalen = outlen; 109 if (data) 110 *data = out; 111 112 err: 113 EVP_CIPHER_CTX_cleanup(&ctx); 114 return out; 115 116 } 117 118 /* Decrypt an OCTET STRING and decode ASN1 structure 119 * if zbuf set zero buffer after use. 120 */ 121 122 void * 123 PKCS12_item_decrypt_d2i(const X509_ALGOR *algor, const ASN1_ITEM *it, 124 const char *pass, int passlen, const ASN1_OCTET_STRING *oct, int zbuf) 125 { 126 unsigned char *out; 127 const unsigned char *p; 128 void *ret; 129 int outlen; 130 131 if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length, 132 &out, &outlen, 0)) { 133 PKCS12error(PKCS12_R_PKCS12_PBE_CRYPT_ERROR); 134 return NULL; 135 } 136 p = out; 137 ret = ASN1_item_d2i(NULL, &p, outlen, it); 138 if (zbuf) 139 explicit_bzero(out, outlen); 140 if (!ret) 141 PKCS12error(PKCS12_R_DECODE_ERROR); 142 free(out); 143 return ret; 144 } 145 146 /* Encode ASN1 structure and encrypt, return OCTET STRING 147 * if zbuf set zero encoding. 148 */ 149 150 ASN1_OCTET_STRING * 151 PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it, 152 const char *pass, int passlen, 153 void *obj, int zbuf) 154 { 155 ASN1_OCTET_STRING *oct; 156 unsigned char *in = NULL; 157 int inlen; 158 159 if (!(oct = ASN1_OCTET_STRING_new ())) { 160 PKCS12error(ERR_R_MALLOC_FAILURE); 161 return NULL; 162 } 163 inlen = ASN1_item_i2d(obj, &in, it); 164 if (!in) { 165 PKCS12error(PKCS12_R_ENCODE_ERROR); 166 goto err; 167 } 168 if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data, 169 &oct->length, 1)) { 170 PKCS12error(PKCS12_R_ENCRYPT_ERROR); 171 goto err; 172 } 173 if (zbuf) 174 explicit_bzero(in, inlen); 175 free(in); 176 return oct; 177 178 err: 179 free(in); 180 ASN1_OCTET_STRING_free(oct); 181 return NULL; 182 } 183 184 IMPLEMENT_PKCS12_STACK_OF(PKCS7) 185