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1 /* asn_pack.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/asn1.h> |
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62 |
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63 #ifndef NO_ASN1_OLD |
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64 |
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65 /* ASN1 packing and unpacking functions */ |
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66 |
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67 /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ |
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68 |
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69 EXPORT_C STACK *ASN1_seq_unpack(const unsigned char *buf, int len, |
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70 d2i_of_void *d2i,void (*free_func)(void *)) |
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71 { |
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72 STACK *sk; |
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73 const unsigned char *pbuf; |
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74 pbuf = buf; |
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75 if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, |
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76 V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) |
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77 ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR); |
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78 return sk; |
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79 } |
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80 |
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81 /* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a |
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82 * OPENSSL_malloc'ed buffer |
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83 */ |
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84 |
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85 EXPORT_C unsigned char *ASN1_seq_pack(STACK *safes, i2d_of_void *i2d, |
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86 unsigned char **buf, int *len) |
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87 { |
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88 int safelen; |
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89 unsigned char *safe, *p; |
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90 if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, |
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91 V_ASN1_UNIVERSAL, IS_SEQUENCE))) { |
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92 ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR); |
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93 return NULL; |
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94 } |
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95 if (!(safe = OPENSSL_malloc (safelen))) { |
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96 ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE); |
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97 return NULL; |
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98 } |
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99 p = safe; |
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100 i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, |
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101 IS_SEQUENCE); |
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102 if (len) *len = safelen; |
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103 if (buf) *buf = safe; |
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104 return safe; |
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105 } |
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106 |
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107 /* Extract an ASN1 object from an ASN1_STRING */ |
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108 |
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109 EXPORT_C void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) |
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110 { |
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111 const unsigned char *p; |
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112 char *ret; |
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113 |
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114 p = oct->data; |
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115 if(!(ret = d2i(NULL, &p, oct->length))) |
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116 ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR); |
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117 return ret; |
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118 } |
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119 |
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120 /* Pack an ASN1 object into an ASN1_STRING */ |
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121 |
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122 EXPORT_C ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct) |
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123 { |
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124 unsigned char *p; |
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125 ASN1_STRING *octmp; |
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126 |
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127 if (!oct || !*oct) { |
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128 if (!(octmp = ASN1_STRING_new ())) { |
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129 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); |
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130 return NULL; |
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131 } |
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132 if (oct) *oct = octmp; |
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133 } else octmp = *oct; |
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134 |
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135 if (!(octmp->length = i2d(obj, NULL))) { |
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136 ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR); |
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137 return NULL; |
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138 } |
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139 if (!(p = OPENSSL_malloc (octmp->length))) { |
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140 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); |
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141 return NULL; |
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142 } |
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143 octmp->data = p; |
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144 i2d (obj, &p); |
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145 return octmp; |
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146 } |
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147 |
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148 #endif |
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149 |
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150 /* ASN1_ITEM versions of the above */ |
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151 |
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152 EXPORT_C ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) |
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153 { |
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154 ASN1_STRING *octmp; |
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155 |
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156 if (!oct || !*oct) { |
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157 if (!(octmp = ASN1_STRING_new ())) { |
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158 ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); |
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159 return NULL; |
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160 } |
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161 if (oct) *oct = octmp; |
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162 } else octmp = *oct; |
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163 |
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164 if(octmp->data) { |
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165 OPENSSL_free(octmp->data); |
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166 octmp->data = NULL; |
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167 } |
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168 |
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169 if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { |
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170 ASN1err(ASN1_F_ASN1_ITEM_PACK,ASN1_R_ENCODE_ERROR); |
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171 return NULL; |
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172 } |
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173 if (!octmp->data) { |
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174 ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); |
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175 return NULL; |
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176 } |
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177 return octmp; |
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178 } |
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179 |
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180 /* Extract an ASN1 object from an ASN1_STRING */ |
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181 |
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182 EXPORT_C void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) |
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183 { |
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184 const unsigned char *p; |
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185 void *ret; |
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186 |
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187 p = oct->data; |
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188 if(!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) |
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189 ASN1err(ASN1_F_ASN1_ITEM_UNPACK,ASN1_R_DECODE_ERROR); |
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190 return ret; |
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191 } |