Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* p12_kiss.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 | /* Simplified PKCS#12 routines */ |
| 64 | |
| 65 | static int parse_pk12( PKCS12 *p12, const char *pass, int passlen, |
| 66 | EVP_PKEY **pkey, STACK_OF(X509) *ocerts); |
| 67 | |
| 68 | static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, |
| 69 | int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts); |
| 70 | |
| 71 | static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen, |
| 72 | EVP_PKEY **pkey, STACK_OF(X509) *ocerts); |
| 73 | |
| 74 | /* Parse and decrypt a PKCS#12 structure returning user key, user cert |
| 75 | * and other (CA) certs. Note either ca should be NULL, *ca should be NULL, |
| 76 | * or it should point to a valid STACK structure. pkey and cert can be |
| 77 | * passed unitialised. |
| 78 | */ |
| 79 | |
| 80 | int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert, |
| 81 | STACK_OF(X509) **ca) |
| 82 | { |
| 83 | STACK_OF(X509) *ocerts = NULL; |
| 84 | X509 *x = NULL; |
| 85 | /* Check for NULL PKCS12 structure */ |
| 86 | |
| 87 | if(!p12) |
| 88 | { |
| 89 | PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER); |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | if(pkey) |
| 94 | *pkey = NULL; |
| 95 | if(cert) |
| 96 | *cert = NULL; |
| 97 | |
| 98 | /* Check the mac */ |
| 99 | |
| 100 | /* If password is zero length or NULL then try verifying both cases |
| 101 | * to determine which password is correct. The reason for this is that |
| 102 | * under PKCS#12 password based encryption no password and a zero length |
| 103 | * password are two different things... |
| 104 | */ |
| 105 | |
| 106 | if(!pass || !*pass) { |
| 107 | if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL; |
| 108 | else if(PKCS12_verify_mac(p12, "", 0)) pass = ""; |
| 109 | else { |
| 110 | PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE); |
| 111 | goto err; |
| 112 | } |
| 113 | } else if (!PKCS12_verify_mac(p12, pass, -1)) { |
| 114 | PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE); |
| 115 | goto err; |
| 116 | } |
| 117 | |
| 118 | /* Allocate stack for other certificates */ |
| 119 | ocerts = sk_X509_new_null(); |
| 120 | |
| 121 | if (!ocerts) |
| 122 | { |
| 123 | PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE); |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | if (!parse_pk12 (p12, pass, -1, pkey, ocerts)) |
| 128 | { |
| 129 | PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR); |
| 130 | goto err; |
| 131 | } |
| 132 | |
| 133 | while ((x = sk_X509_pop(ocerts))) |
| 134 | { |
| 135 | if (pkey && *pkey && cert && !*cert) |
| 136 | { |
| 137 | if (X509_check_private_key(x, *pkey)) |
| 138 | { |
| 139 | *cert = x; |
| 140 | x = NULL; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | if (ca && x) |
| 145 | { |
| 146 | if (!*ca) |
| 147 | *ca = sk_X509_new_null(); |
| 148 | if (!*ca) |
| 149 | goto err; |
| 150 | if (!sk_X509_push(*ca, x)) |
| 151 | goto err; |
| 152 | x = NULL; |
| 153 | } |
| 154 | if (x) |
| 155 | X509_free(x); |
| 156 | } |
| 157 | |
| 158 | if (ocerts) |
| 159 | sk_X509_pop_free(ocerts, X509_free); |
| 160 | |
| 161 | return 1; |
| 162 | |
| 163 | err: |
| 164 | |
| 165 | if (pkey && *pkey) |
| 166 | EVP_PKEY_free(*pkey); |
| 167 | if (cert && *cert) |
| 168 | X509_free(*cert); |
| 169 | if (x) |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 170 | X509_free(*cert); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 171 | if (ocerts) |
| 172 | sk_X509_pop_free(ocerts, X509_free); |
| 173 | return 0; |
| 174 | |
| 175 | } |
| 176 | |
| 177 | /* Parse the outer PKCS#12 structure */ |
| 178 | |
| 179 | static int parse_pk12(PKCS12 *p12, const char *pass, int passlen, |
| 180 | EVP_PKEY **pkey, STACK_OF(X509) *ocerts) |
| 181 | { |
| 182 | STACK_OF(PKCS7) *asafes; |
| 183 | STACK_OF(PKCS12_SAFEBAG) *bags; |
| 184 | int i, bagnid; |
| 185 | PKCS7 *p7; |
| 186 | |
| 187 | if (!(asafes = PKCS12_unpack_authsafes (p12))) return 0; |
| 188 | for (i = 0; i < sk_PKCS7_num (asafes); i++) { |
| 189 | p7 = sk_PKCS7_value (asafes, i); |
| 190 | bagnid = OBJ_obj2nid (p7->type); |
| 191 | if (bagnid == NID_pkcs7_data) { |
| 192 | bags = PKCS12_unpack_p7data(p7); |
| 193 | } else if (bagnid == NID_pkcs7_encrypted) { |
| 194 | bags = PKCS12_unpack_p7encdata(p7, pass, passlen); |
| 195 | } else continue; |
| 196 | if (!bags) { |
| 197 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 198 | return 0; |
| 199 | } |
| 200 | if (!parse_bags(bags, pass, passlen, pkey, ocerts)) { |
| 201 | sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); |
| 202 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 203 | return 0; |
| 204 | } |
| 205 | sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); |
| 206 | } |
| 207 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 208 | return 1; |
| 209 | } |
| 210 | |
| 211 | |
| 212 | static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, |
| 213 | int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts) |
| 214 | { |
| 215 | int i; |
| 216 | for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) { |
| 217 | if (!parse_bag(sk_PKCS12_SAFEBAG_value (bags, i), |
| 218 | pass, passlen, pkey, ocerts)) |
| 219 | return 0; |
| 220 | } |
| 221 | return 1; |
| 222 | } |
| 223 | |
| 224 | static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen, |
| 225 | EVP_PKEY **pkey, STACK_OF(X509) *ocerts) |
| 226 | { |
| 227 | PKCS8_PRIV_KEY_INFO *p8; |
| 228 | X509 *x509; |
| 229 | ASN1_TYPE *attrib; |
| 230 | ASN1_BMPSTRING *fname = NULL; |
| 231 | ASN1_OCTET_STRING *lkid = NULL; |
| 232 | |
| 233 | if ((attrib = PKCS12_get_attr (bag, NID_friendlyName))) |
| 234 | fname = attrib->value.bmpstring; |
| 235 | |
| 236 | if ((attrib = PKCS12_get_attr (bag, NID_localKeyID))) |
| 237 | lkid = attrib->value.octet_string; |
| 238 | |
| 239 | switch (M_PKCS12_bag_type(bag)) |
| 240 | { |
| 241 | case NID_keyBag: |
| 242 | if (!pkey || *pkey) |
| 243 | return 1; |
| 244 | if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) |
| 245 | return 0; |
| 246 | break; |
| 247 | |
| 248 | case NID_pkcs8ShroudedKeyBag: |
| 249 | if (!pkey || *pkey) |
| 250 | return 1; |
| 251 | if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen))) |
| 252 | return 0; |
| 253 | *pkey = EVP_PKCS82PKEY(p8); |
| 254 | PKCS8_PRIV_KEY_INFO_free(p8); |
| 255 | if (!(*pkey)) return 0; |
| 256 | break; |
| 257 | |
| 258 | case NID_certBag: |
| 259 | if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate ) |
| 260 | return 1; |
| 261 | if (!(x509 = PKCS12_certbag2x509(bag))) |
| 262 | return 0; |
| 263 | if(lkid && !X509_keyid_set1(x509, lkid->data, lkid->length)) |
| 264 | { |
| 265 | X509_free(x509); |
| 266 | return 0; |
| 267 | } |
| 268 | if(fname) { |
| 269 | int len, r; |
| 270 | unsigned char *data; |
| 271 | len = ASN1_STRING_to_UTF8(&data, fname); |
| 272 | if(len > 0) { |
| 273 | r = X509_alias_set1(x509, data, len); |
| 274 | OPENSSL_free(data); |
| 275 | if (!r) |
| 276 | { |
| 277 | X509_free(x509); |
| 278 | return 0; |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | if(!sk_X509_push(ocerts, x509)) |
| 284 | { |
| 285 | X509_free(x509); |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | break; |
| 290 | |
| 291 | case NID_safeContentsBag: |
| 292 | return parse_bags(bag->value.safes, pass, passlen, |
| 293 | pkey, ocerts); |
| 294 | break; |
| 295 | |
| 296 | default: |
| 297 | return 1; |
| 298 | break; |
| 299 | } |
| 300 | return 1; |
| 301 | } |
| 302 | |