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1 /* p12_kiss.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 /* Simplified PKCS#12 routines */ |
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64 |
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65 static int parse_pk12( PKCS12 *p12, const char *pass, int passlen, |
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66 EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca); |
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67 |
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68 static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, |
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69 int passlen, EVP_PKEY **pkey, X509 **cert, |
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70 STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid, |
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71 char *keymatch); |
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72 |
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73 static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen, |
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74 EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca, |
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75 ASN1_OCTET_STRING **keyid, char *keymatch); |
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76 |
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77 /* Parse and decrypt a PKCS#12 structure returning user key, user cert |
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78 * and other (CA) certs. Note either ca should be NULL, *ca should be NULL, |
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79 * or it should point to a valid STACK structure. pkey and cert can be |
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80 * passed unitialised. |
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81 */ |
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82 |
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83 EXPORT_C int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert, |
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84 STACK_OF(X509) **ca) |
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85 { |
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86 |
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87 /* Check for NULL PKCS12 structure */ |
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88 |
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89 if(!p12) { |
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90 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER); |
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91 return 0; |
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92 } |
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93 |
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94 /* Allocate stack for ca certificates if needed */ |
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95 if ((ca != NULL) && (*ca == NULL)) { |
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96 if (!(*ca = sk_X509_new_null())) { |
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97 PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE); |
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98 return 0; |
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99 } |
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100 } |
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101 |
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102 if(pkey) *pkey = NULL; |
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103 if(cert) *cert = NULL; |
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104 |
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105 /* Check the mac */ |
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106 |
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107 /* If password is zero length or NULL then try verifying both cases |
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108 * to determine which password is correct. The reason for this is that |
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109 * under PKCS#12 password based encryption no password and a zero length |
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110 * password are two different things... |
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111 */ |
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112 |
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113 if(!pass || !*pass) { |
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114 if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL; |
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115 else if(PKCS12_verify_mac(p12, "", 0)) pass = ""; |
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116 else { |
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117 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE); |
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118 goto err; |
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119 } |
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120 } else if (!PKCS12_verify_mac(p12, pass, -1)) { |
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121 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE); |
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122 goto err; |
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123 } |
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124 |
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125 if (!parse_pk12 (p12, pass, -1, pkey, cert, ca)) |
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126 { |
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127 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR); |
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128 goto err; |
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129 } |
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130 |
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131 return 1; |
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132 |
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133 err: |
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134 |
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135 if (pkey && *pkey) EVP_PKEY_free(*pkey); |
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136 if (cert && *cert) X509_free(*cert); |
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137 if (ca) sk_X509_pop_free(*ca, X509_free); |
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138 return 0; |
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139 |
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140 } |
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141 |
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142 /* Parse the outer PKCS#12 structure */ |
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143 |
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144 static int parse_pk12(PKCS12 *p12, const char *pass, int passlen, |
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145 EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca) |
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146 { |
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147 STACK_OF(PKCS7) *asafes; |
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148 STACK_OF(PKCS12_SAFEBAG) *bags; |
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149 int i, bagnid; |
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150 PKCS7 *p7; |
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151 ASN1_OCTET_STRING *keyid = NULL; |
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152 |
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153 char keymatch = 0; |
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154 if (!(asafes = PKCS12_unpack_authsafes (p12))) return 0; |
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155 for (i = 0; i < sk_PKCS7_num (asafes); i++) { |
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156 p7 = sk_PKCS7_value (asafes, i); |
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157 bagnid = OBJ_obj2nid (p7->type); |
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158 if (bagnid == NID_pkcs7_data) { |
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159 bags = PKCS12_unpack_p7data(p7); |
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160 } else if (bagnid == NID_pkcs7_encrypted) { |
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161 bags = PKCS12_unpack_p7encdata(p7, pass, passlen); |
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162 } else continue; |
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163 if (!bags) { |
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164 sk_PKCS7_pop_free(asafes, PKCS7_free); |
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165 return 0; |
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166 } |
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167 if (!parse_bags(bags, pass, passlen, pkey, cert, ca, |
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168 &keyid, &keymatch)) { |
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169 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); |
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170 sk_PKCS7_pop_free(asafes, PKCS7_free); |
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171 return 0; |
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172 } |
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173 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); |
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174 } |
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175 sk_PKCS7_pop_free(asafes, PKCS7_free); |
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176 if (keyid) M_ASN1_OCTET_STRING_free(keyid); |
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177 return 1; |
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178 } |
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179 |
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180 |
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181 static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, |
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182 int passlen, EVP_PKEY **pkey, X509 **cert, |
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183 STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid, |
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184 char *keymatch) |
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185 { |
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186 int i; |
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187 for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) { |
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188 if (!parse_bag(sk_PKCS12_SAFEBAG_value (bags, i), |
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189 pass, passlen, pkey, cert, ca, keyid, |
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190 keymatch)) return 0; |
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191 } |
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192 return 1; |
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193 } |
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194 |
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195 #define MATCH_KEY 0x1 |
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196 #define MATCH_CERT 0x2 |
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197 #define MATCH_ALL 0x3 |
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198 |
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199 static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen, |
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200 EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca, |
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201 ASN1_OCTET_STRING **keyid, |
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202 char *keymatch) |
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203 { |
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204 PKCS8_PRIV_KEY_INFO *p8; |
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205 X509 *x509; |
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206 ASN1_OCTET_STRING *lkey = NULL, *ckid = NULL; |
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207 ASN1_TYPE *attrib; |
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208 ASN1_BMPSTRING *fname = NULL; |
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209 |
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210 if ((attrib = PKCS12_get_attr (bag, NID_friendlyName))) |
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211 fname = attrib->value.bmpstring; |
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212 |
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213 if ((attrib = PKCS12_get_attr (bag, NID_localKeyID))) { |
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214 lkey = attrib->value.octet_string; |
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215 ckid = lkey; |
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216 } |
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217 |
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218 /* Check for any local key id matching (if needed) */ |
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219 if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) { |
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220 if (*keyid) { |
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221 if (M_ASN1_OCTET_STRING_cmp(*keyid, lkey)) lkey = NULL; |
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222 } else { |
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223 if (!(*keyid = M_ASN1_OCTET_STRING_dup(lkey))) { |
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224 PKCS12err(PKCS12_F_PARSE_BAG,ERR_R_MALLOC_FAILURE); |
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225 return 0; |
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226 } |
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227 } |
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228 } |
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229 |
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230 switch (M_PKCS12_bag_type(bag)) |
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231 { |
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232 case NID_keyBag: |
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233 if (!lkey || !pkey) return 1; |
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234 if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) return 0; |
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235 *keymatch |= MATCH_KEY; |
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236 break; |
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237 |
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238 case NID_pkcs8ShroudedKeyBag: |
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239 if (!lkey || !pkey) return 1; |
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240 if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen))) |
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241 return 0; |
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242 *pkey = EVP_PKCS82PKEY(p8); |
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243 PKCS8_PRIV_KEY_INFO_free(p8); |
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244 if (!(*pkey)) return 0; |
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245 *keymatch |= MATCH_KEY; |
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246 break; |
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247 |
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248 case NID_certBag: |
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249 if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate ) |
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250 return 1; |
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251 if (!(x509 = PKCS12_certbag2x509(bag))) return 0; |
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252 if(ckid) |
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253 { |
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254 if (!X509_keyid_set1(x509, ckid->data, ckid->length)) |
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255 { |
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256 X509_free(x509); |
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257 return 0; |
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258 } |
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259 } |
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260 if(fname) { |
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261 int len, r; |
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262 unsigned char *data; |
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263 len = ASN1_STRING_to_UTF8(&data, fname); |
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264 if(len > 0) { |
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265 r = X509_alias_set1(x509, data, len); |
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266 OPENSSL_free(data); |
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267 if (!r) |
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268 { |
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269 X509_free(x509); |
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270 return 0; |
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271 } |
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272 } |
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273 } |
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274 |
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275 |
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276 if (lkey) { |
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277 *keymatch |= MATCH_CERT; |
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278 if (cert) *cert = x509; |
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279 else X509_free(x509); |
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280 } else { |
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281 if(ca) sk_X509_push (*ca, x509); |
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282 else X509_free(x509); |
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283 } |
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284 break; |
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285 |
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286 case NID_safeContentsBag: |
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287 return parse_bags(bag->value.safes, pass, passlen, |
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288 pkey, cert, ca, keyid, keymatch); |
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289 break; |
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290 |
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291 default: |
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292 return 1; |
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293 break; |
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294 } |
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295 return 1; |
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296 } |
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297 |