Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* p12_decr.c */ |
| 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 "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 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 92 | EVP_CipherUpdate(&ctx, out, &i, in, inlen); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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) |