1 /* $OpenBSD: x509_req.c,v 1.17 2015/03/15 22:52:17 doug Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 61 #include <openssl/opensslconf.h> 62 63 #include <openssl/asn1.h> 64 #include <openssl/asn1t.h> 65 #include <openssl/bn.h> 66 #include <openssl/buffer.h> 67 #include <openssl/err.h> 68 #include <openssl/evp.h> 69 #include <openssl/objects.h> 70 #include <openssl/pem.h> 71 #include <openssl/x509.h> 72 73 X509_REQ * 74 X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md) 75 { 76 X509_REQ *ret; 77 X509_REQ_INFO *ri; 78 int i; 79 EVP_PKEY *pktmp; 80 81 ret = X509_REQ_new(); 82 if (ret == NULL) { 83 X509err(X509_F_X509_TO_X509_REQ, ERR_R_MALLOC_FAILURE); 84 goto err; 85 } 86 87 ri = ret->req_info; 88 89 if ((ri->version = ASN1_INTEGER_new()) == NULL) 90 goto err; 91 if (ASN1_INTEGER_set(ri->version, 0) == 0) 92 goto err; 93 94 if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x))) 95 goto err; 96 97 if ((pktmp = X509_get_pubkey(x)) == NULL) 98 goto err; 99 100 i = X509_REQ_set_pubkey(ret, pktmp); 101 EVP_PKEY_free(pktmp); 102 if (!i) 103 goto err; 104 105 if (pkey != NULL) { 106 if (!X509_REQ_sign(ret, pkey, md)) 107 goto err; 108 } 109 return (ret); 110 111 err: 112 X509_REQ_free(ret); 113 return (NULL); 114 } 115 116 EVP_PKEY * 117 X509_REQ_get_pubkey(X509_REQ *req) 118 { 119 if ((req == NULL) || (req->req_info == NULL)) 120 return (NULL); 121 return (X509_PUBKEY_get(req->req_info->pubkey)); 122 } 123 124 int 125 X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k) 126 { 127 EVP_PKEY *xk = NULL; 128 int ok = 0; 129 130 xk = X509_REQ_get_pubkey(x); 131 switch (EVP_PKEY_cmp(xk, k)) { 132 case 1: 133 ok = 1; 134 break; 135 case 0: 136 X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, 137 X509_R_KEY_VALUES_MISMATCH); 138 break; 139 case -1: 140 X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, 141 X509_R_KEY_TYPE_MISMATCH); 142 break; 143 case -2: 144 #ifndef OPENSSL_NO_EC 145 if (k->type == EVP_PKEY_EC) { 146 X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, 147 ERR_R_EC_LIB); 148 break; 149 } 150 #endif 151 #ifndef OPENSSL_NO_DH 152 if (k->type == EVP_PKEY_DH) { 153 /* No idea */ 154 X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, 155 X509_R_CANT_CHECK_DH_KEY); 156 break; 157 } 158 #endif 159 X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, 160 X509_R_UNKNOWN_KEY_TYPE); 161 } 162 163 EVP_PKEY_free(xk); 164 return (ok); 165 } 166 167 /* It seems several organisations had the same idea of including a list of 168 * extensions in a certificate request. There are at least two OIDs that are 169 * used and there may be more: so the list is configurable. 170 */ 171 172 static int ext_nid_list[] = {NID_ext_req, NID_ms_ext_req, NID_undef}; 173 174 static int *ext_nids = ext_nid_list; 175 176 int 177 X509_REQ_extension_nid(int req_nid) 178 { 179 int i, nid; 180 181 for (i = 0; ; i++) { 182 nid = ext_nids[i]; 183 if (nid == NID_undef) 184 return 0; 185 else if (req_nid == nid) 186 return 1; 187 } 188 } 189 190 int * 191 X509_REQ_get_extension_nids(void) 192 { 193 return ext_nids; 194 } 195 196 void 197 X509_REQ_set_extension_nids(int *nids) 198 { 199 ext_nids = nids; 200 } 201 202 STACK_OF(X509_EXTENSION) * 203 X509_REQ_get_extensions(X509_REQ *req) 204 { 205 X509_ATTRIBUTE *attr; 206 ASN1_TYPE *ext = NULL; 207 int idx, *pnid; 208 const unsigned char *p; 209 210 if ((req == NULL) || (req->req_info == NULL) || !ext_nids) 211 return (NULL); 212 for (pnid = ext_nids; *pnid != NID_undef; pnid++) { 213 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1); 214 if (idx == -1) 215 continue; 216 attr = X509_REQ_get_attr(req, idx); 217 if (attr->single) 218 ext = attr->value.single; 219 else if (sk_ASN1_TYPE_num(attr->value.set)) 220 ext = sk_ASN1_TYPE_value(attr->value.set, 0); 221 break; 222 } 223 if (!ext || (ext->type != V_ASN1_SEQUENCE)) 224 return NULL; 225 p = ext->value.sequence->data; 226 return (STACK_OF(X509_EXTENSION) *)ASN1_item_d2i(NULL, &p, 227 ext->value.sequence->length, ASN1_ITEM_rptr(X509_EXTENSIONS)); 228 } 229 230 /* Add a STACK_OF extensions to a certificate request: allow alternative OIDs 231 * in case we want to create a non standard one. 232 */ 233 234 int 235 X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts, 236 int nid) 237 { 238 ASN1_TYPE *at = NULL; 239 X509_ATTRIBUTE *attr = NULL; 240 241 if (!(at = ASN1_TYPE_new()) || 242 !(at->value.sequence = ASN1_STRING_new())) 243 goto err; 244 245 at->type = V_ASN1_SEQUENCE; 246 /* Generate encoding of extensions */ 247 at->value.sequence->length = ASN1_item_i2d((ASN1_VALUE *)exts, 248 &at->value.sequence->data, ASN1_ITEM_rptr(X509_EXTENSIONS)); 249 if (!(attr = X509_ATTRIBUTE_new())) 250 goto err; 251 if (!(attr->value.set = sk_ASN1_TYPE_new_null())) 252 goto err; 253 if (!sk_ASN1_TYPE_push(attr->value.set, at)) 254 goto err; 255 at = NULL; 256 attr->single = 0; 257 attr->object = OBJ_nid2obj(nid); 258 if (!req->req_info->attributes) { 259 if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null())) 260 goto err; 261 } 262 if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr)) 263 goto err; 264 return 1; 265 266 err: 267 X509_ATTRIBUTE_free(attr); 268 ASN1_TYPE_free(at); 269 return 0; 270 } 271 272 /* This is the normal usage: use the "official" OID */ 273 int 274 X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts) 275 { 276 return X509_REQ_add_extensions_nid(req, exts, NID_ext_req); 277 } 278 279 /* Request attribute functions */ 280 281 int 282 X509_REQ_get_attr_count(const X509_REQ *req) 283 { 284 return X509at_get_attr_count(req->req_info->attributes); 285 } 286 287 int 288 X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos) 289 { 290 return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos); 291 } 292 293 int 294 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj, int lastpos) 295 { 296 return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos); 297 } 298 299 X509_ATTRIBUTE * 300 X509_REQ_get_attr(const X509_REQ *req, int loc) 301 { 302 return X509at_get_attr(req->req_info->attributes, loc); 303 } 304 305 X509_ATTRIBUTE * 306 X509_REQ_delete_attr(X509_REQ *req, int loc) 307 { 308 return X509at_delete_attr(req->req_info->attributes, loc); 309 } 310 311 int 312 X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr) 313 { 314 if (X509at_add1_attr(&req->req_info->attributes, attr)) 315 return 1; 316 return 0; 317 } 318 319 int 320 X509_REQ_add1_attr_by_OBJ(X509_REQ *req, const ASN1_OBJECT *obj, int type, 321 const unsigned char *bytes, int len) 322 { 323 if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj, 324 type, bytes, len)) 325 return 1; 326 return 0; 327 } 328 329 int 330 X509_REQ_add1_attr_by_NID(X509_REQ *req, int nid, int type, 331 const unsigned char *bytes, int len) 332 { 333 if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid, 334 type, bytes, len)) 335 return 1; 336 return 0; 337 } 338 339 int 340 X509_REQ_add1_attr_by_txt(X509_REQ *req, const char *attrname, int type, 341 const unsigned char *bytes, int len) 342 { 343 if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname, 344 type, bytes, len)) 345 return 1; 346 return 0; 347 } 348