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1 /* p12_decr.c */ |
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2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL |
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3 * project 1999. |
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4 */ |
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5 /* ==================================================================== |
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6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
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7 * |
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8 * Redistribution and use in source and binary forms, with or without |
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9 * modification, are permitted provided that the following conditions |
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10 * are met: |
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11 * |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in |
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17 * the documentation and/or other materials provided with the |
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18 * distribution. |
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19 * |
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20 * 3. All advertising materials mentioning features or use of this |
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21 * software must display the following acknowledgment: |
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22 * "This product includes software developed by the OpenSSL Project |
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23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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24 * |
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25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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26 * endorse or promote products derived from this software without |
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27 * prior written permission. For written permission, please contact |
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28 * licensing@OpenSSL.org. |
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29 * |
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30 * 5. Products derived from this software may not be called "OpenSSL" |
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31 * nor may "OpenSSL" appear in their names without prior written |
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32 * permission of the OpenSSL Project. |
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33 * |
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34 * 6. Redistributions of any form whatsoever must retain the following |
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35 * acknowledgment: |
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36 * "This product includes software developed by the OpenSSL Project |
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37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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38 * |
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39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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50 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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51 * ==================================================================== |
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52 * |
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53 * This product includes cryptographic software written by Eric Young |
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54 * (eay@cryptsoft.com). This product includes software written by Tim |
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55 * Hudson (tjh@cryptsoft.com). |
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56 * |
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57 */ |
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58 |
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59 #include <stdio.h> |
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60 #include "cryptlib.h" |
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61 #include <openssl/pkcs12.h> |
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62 |
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63 /* Define this to dump decrypted output to files called DERnnn */ |
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64 /*#define DEBUG_DECRYPT*/ |
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65 |
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66 |
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67 /* Encrypt/Decrypt a buffer based on password and algor, result in a |
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68 * OPENSSL_malloc'ed buffer |
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69 */ |
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70 |
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71 EXPORT_C unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass, |
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72 int passlen, unsigned char *in, int inlen, unsigned char **data, |
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73 int *datalen, int en_de) |
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74 { |
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75 unsigned char *out; |
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76 int outlen, i; |
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77 EVP_CIPHER_CTX ctx; |
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78 |
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79 EVP_CIPHER_CTX_init(&ctx); |
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80 /* Decrypt data */ |
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81 if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen, |
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82 algor->parameter, &ctx, en_de)) { |
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83 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR); |
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84 return NULL; |
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85 } |
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86 |
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87 if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) { |
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88 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE); |
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89 goto err; |
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90 } |
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91 |
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92 EVP_CipherUpdate(&ctx, out, &i, in, inlen); |
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93 outlen = i; |
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94 if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) { |
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95 OPENSSL_free(out); |
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96 out = NULL; |
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97 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR); |
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98 goto err; |
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99 } |
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100 outlen += i; |
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101 if (datalen) *datalen = outlen; |
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102 if (data) *data = out; |
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103 err: |
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104 EVP_CIPHER_CTX_cleanup(&ctx); |
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105 return out; |
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106 |
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107 } |
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108 |
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109 /* Decrypt an OCTET STRING and decode ASN1 structure |
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110 * if zbuf set zero buffer after use. |
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111 */ |
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112 |
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113 EXPORT_C void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it, |
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114 const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf) |
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115 { |
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116 unsigned char *out; |
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117 const unsigned char *p; |
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118 void *ret; |
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119 int outlen; |
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120 |
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121 if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length, |
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122 &out, &outlen, 0)) { |
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123 PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR); |
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124 return NULL; |
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125 } |
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126 p = out; |
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127 #ifdef DEBUG_DECRYPT |
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128 { |
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129 FILE *op; |
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130 |
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131 char fname[30]; |
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132 static int fnm = 1; |
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133 sprintf(fname, "DER%d", fnm++); |
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134 op = fopen(fname, "wb"); |
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135 fwrite (p, 1, outlen, op); |
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136 fclose(op); |
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137 } |
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138 #endif |
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139 ret = ASN1_item_d2i(NULL, &p, outlen, it); |
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140 if (zbuf) OPENSSL_cleanse(out, outlen); |
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141 if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR); |
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142 OPENSSL_free(out); |
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143 return ret; |
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144 } |
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145 |
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146 /* Encode ASN1 structure and encrypt, return OCTET STRING |
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147 * if zbuf set zero encoding. |
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148 */ |
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149 |
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150 EXPORT_C ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it, |
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151 const char *pass, int passlen, |
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152 void *obj, int zbuf) |
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153 { |
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154 ASN1_OCTET_STRING *oct; |
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155 unsigned char *in = NULL; |
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156 int inlen; |
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157 if (!(oct = M_ASN1_OCTET_STRING_new ())) { |
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158 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE); |
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159 return NULL; |
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160 } |
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161 inlen = ASN1_item_i2d(obj, &in, it); |
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162 if (!in) { |
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163 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR); |
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164 return NULL; |
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165 } |
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166 if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data, |
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167 &oct->length, 1)) { |
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168 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR); |
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169 OPENSSL_free(in); |
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170 return NULL; |
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171 } |
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172 if (zbuf) OPENSSL_cleanse(in, inlen); |
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173 OPENSSL_free(in); |
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174 return oct; |
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175 } |
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176 |
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177 IMPLEMENT_PKCS12_STACK_OF(PKCS7) |