1 /* p12_decr.c */ 2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include <openssl/pkcs12.h> 62 63 /* Define this to dump decrypted output to files called DERnnn */ 64 /*#define DEBUG_DECRYPT*/ 65 66 67 /* Encrypt/Decrypt a buffer based on password and algor, result in a 68 * OPENSSL_malloc'ed buffer 69 */ 70 71 unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass, 72 int passlen, unsigned char *in, int inlen, unsigned char **data, 73 int *datalen, int en_de) 74 { 75 unsigned char *out; 76 int outlen, i; 77 EVP_CIPHER_CTX ctx; 78 79 EVP_CIPHER_CTX_init(&ctx); 80 /* Decrypt data */ 81 if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen, 82 algor->parameter, &ctx, en_de)) { 83 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR); 84 return NULL; 85 } 86 87 if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) { 88 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE); 89 goto err; 90 } 91 92 EVP_CipherUpdate(&ctx, out, &i, in, inlen); 93 outlen = i; 94 if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) { 95 OPENSSL_free(out); 96 out = NULL; 97 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR); 98 goto err; 99 } 100 outlen += i; 101 if (datalen) *datalen = outlen; 102 if (data) *data = out; 103 err: 104 EVP_CIPHER_CTX_cleanup(&ctx); 105 return out; 106 107 } 108 109 /* Decrypt an OCTET STRING and decode ASN1 structure 110 * if zbuf set zero buffer after use. 111 */ 112 113 void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it, 114 const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf) 115 { 116 unsigned char *out; 117 const unsigned char *p; 118 void *ret; 119 int outlen; 120 121 if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length, 122 &out, &outlen, 0)) { 123 PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR); 124 return NULL; 125 } 126 p = out; 127 #ifdef DEBUG_DECRYPT 128 { 129 FILE *op; 130 131 char fname[30]; 132 static int fnm = 1; 133 sprintf(fname, "DER%d", fnm++); 134 op = fopen(fname, "wb"); 135 fwrite (p, 1, outlen, op); 136 fclose(op); 137 } 138 #endif 139 ret = ASN1_item_d2i(NULL, &p, outlen, it); 140 if (zbuf) OPENSSL_cleanse(out, outlen); 141 if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR); 142 OPENSSL_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 *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it, 151 const char *pass, int passlen, 152 void *obj, int zbuf) 153 { 154 ASN1_OCTET_STRING *oct; 155 unsigned char *in = NULL; 156 int inlen; 157 if (!(oct = M_ASN1_OCTET_STRING_new ())) { 158 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE); 159 return NULL; 160 } 161 inlen = ASN1_item_i2d(obj, &in, it); 162 if (!in) { 163 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR); 164 return NULL; 165 } 166 if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data, 167 &oct->length, 1)) { 168 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR); 169 OPENSSL_free(in); 170 return NULL; 171 } 172 if (zbuf) OPENSSL_cleanse(in, inlen); 173 OPENSSL_free(in); 174 return oct; 175 } 176 177 IMPLEMENT_PKCS12_STACK_OF(PKCS7) 178
