1 /* $OpenBSD: x509_req.c,v 1.21 2018/05/13 06:48:00 tb 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 X509error(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 X509error(X509_R_KEY_VALUES_MISMATCH); 137 break; 138 case -1: 139 X509error(X509_R_KEY_TYPE_MISMATCH); 140 break; 141 case -2: 142 #ifndef OPENSSL_NO_EC 143 if (k->type == EVP_PKEY_EC) { 144 X509error(ERR_R_EC_LIB); 145 break; 146 } 147 #endif 148 #ifndef OPENSSL_NO_DH 149 if (k->type == EVP_PKEY_DH) { 150 /* No idea */ 151 X509error(X509_R_CANT_CHECK_DH_KEY); 152 break; 153 } 154 #endif 155 X509error(X509_R_UNKNOWN_KEY_TYPE); 156 } 157 158 EVP_PKEY_free(xk); 159 return (ok); 160 } 161 162 /* It seems several organisations had the same idea of including a list of 163 * extensions in a certificate request. There are at least two OIDs that are 164 * used and there may be more: so the list is configurable. 165 */ 166 167 static int ext_nid_list[] = {NID_ext_req, NID_ms_ext_req, NID_undef}; 168 169 static int *ext_nids = ext_nid_list; 170 171 int 172 X509_REQ_extension_nid(int req_nid) 173 { 174 int i, nid; 175 176 for (i = 0; ; i++) { 177 nid = ext_nids[i]; 178 if (nid == NID_undef) 179 return 0; 180 else if (req_nid == nid) 181 return 1; 182 } 183 } 184 185 int * 186 X509_REQ_get_extension_nids(void) 187 { 188 return ext_nids; 189 } 190 191 void 192 X509_REQ_set_extension_nids(int *nids) 193 { 194 ext_nids = nids; 195 } 196 197 STACK_OF(X509_EXTENSION) * 198 X509_REQ_get_extensions(X509_REQ *req) 199 { 200 X509_ATTRIBUTE *attr; 201 ASN1_TYPE *ext = NULL; 202 int idx, *pnid; 203 const unsigned char *p; 204 205 if ((req == NULL) || (req->req_info == NULL) || !ext_nids) 206 return (NULL); 207 for (pnid = ext_nids; *pnid != NID_undef; pnid++) { 208 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1); 209 if (idx == -1) 210 continue; 211 attr = X509_REQ_get_attr(req, idx); 212 if (attr->single) 213 ext = attr->value.single; 214 else if (sk_ASN1_TYPE_num(attr->value.set)) 215 ext = sk_ASN1_TYPE_value(attr->value.set, 0); 216 break; 217 } 218 if (!ext || (ext->type != V_ASN1_SEQUENCE)) 219 return NULL; 220 p = ext->value.sequence->data; 221 return (STACK_OF(X509_EXTENSION) *)ASN1_item_d2i(NULL, &p, 222 ext->value.sequence->length, &X509_EXTENSIONS_it); 223 } 224 225 /* Add a STACK_OF extensions to a certificate request: allow alternative OIDs 226 * in case we want to create a non standard one. 227 */ 228 229 int 230 X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts, 231 int nid) 232 { 233 ASN1_TYPE *at = NULL; 234 X509_ATTRIBUTE *attr = NULL; 235 236 if (!(at = ASN1_TYPE_new()) || 237 !(at->value.sequence = ASN1_STRING_new())) 238 goto err; 239 240 at->type = V_ASN1_SEQUENCE; 241 /* Generate encoding of extensions */ 242 at->value.sequence->length = ASN1_item_i2d((ASN1_VALUE *)exts, 243 &at->value.sequence->data, &X509_EXTENSIONS_it); 244 if (!(attr = X509_ATTRIBUTE_new())) 245 goto err; 246 if (!(attr->value.set = sk_ASN1_TYPE_new_null())) 247 goto err; 248 if (!sk_ASN1_TYPE_push(attr->value.set, at)) 249 goto err; 250 at = NULL; 251 attr->single = 0; 252 attr->object = OBJ_nid2obj(nid); 253 if (!req->req_info->attributes) { 254 if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null())) 255 goto err; 256 } 257 if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr)) 258 goto err; 259 return 1; 260 261 err: 262 X509_ATTRIBUTE_free(attr); 263 ASN1_TYPE_free(at); 264 return 0; 265 } 266 267 /* This is the normal usage: use the "official" OID */ 268 int 269 X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts) 270 { 271 return X509_REQ_add_extensions_nid(req, exts, NID_ext_req); 272 } 273 274 /* Request attribute functions */ 275 276 int 277 X509_REQ_get_attr_count(const X509_REQ *req) 278 { 279 return X509at_get_attr_count(req->req_info->attributes); 280 } 281 282 int 283 X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos) 284 { 285 return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos); 286 } 287 288 int 289 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, const ASN1_OBJECT *obj, 290 int lastpos) 291 { 292 return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos); 293 } 294 295 X509_ATTRIBUTE * 296 X509_REQ_get_attr(const X509_REQ *req, int loc) 297 { 298 return X509at_get_attr(req->req_info->attributes, loc); 299 } 300 301 X509_ATTRIBUTE * 302 X509_REQ_delete_attr(X509_REQ *req, int loc) 303 { 304 return X509at_delete_attr(req->req_info->attributes, loc); 305 } 306 307 int 308 X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr) 309 { 310 if (X509at_add1_attr(&req->req_info->attributes, attr)) 311 return 1; 312 return 0; 313 } 314 315 int 316 X509_REQ_add1_attr_by_OBJ(X509_REQ *req, const ASN1_OBJECT *obj, int type, 317 const unsigned char *bytes, int len) 318 { 319 if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj, 320 type, bytes, len)) 321 return 1; 322 return 0; 323 } 324 325 int 326 X509_REQ_add1_attr_by_NID(X509_REQ *req, int nid, int type, 327 const unsigned char *bytes, int len) 328 { 329 if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid, 330 type, bytes, len)) 331 return 1; 332 return 0; 333 } 334 335 int 336 X509_REQ_add1_attr_by_txt(X509_REQ *req, const char *attrname, int type, 337 const unsigned char *bytes, int len) 338 { 339 if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname, 340 type, bytes, len)) 341 return 1; 342 return 0; 343 } 344