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) 170 X509_free(x); 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 } 302 303