1 /* $OpenBSD: x509_req.c,v 1.23 2021/10/23 11:56:10 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 EVP_PKEY * 125 X509_REQ_get0_pubkey(X509_REQ *req) 126 { 127 if (req == NULL || req->req_info == NULL) 128 return NULL; 129 return X509_PUBKEY_get0(req->req_info->pubkey); 130 } 131 132 int 133 X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k) 134 { 135 EVP_PKEY *xk = NULL; 136 int ok = 0; 137 138 xk = X509_REQ_get_pubkey(x); 139 switch (EVP_PKEY_cmp(xk, k)) { 140 case 1: 141 ok = 1; 142 break; 143 case 0: 144 X509error(X509_R_KEY_VALUES_MISMATCH); 145 break; 146 case -1: 147 X509error(X509_R_KEY_TYPE_MISMATCH); 148 break; 149 case -2: 150 #ifndef OPENSSL_NO_EC 151 if (k->type == EVP_PKEY_EC) { 152 X509error(ERR_R_EC_LIB); 153 break; 154 } 155 #endif 156 #ifndef OPENSSL_NO_DH 157 if (k->type == EVP_PKEY_DH) { 158 /* No idea */ 159 X509error(X509_R_CANT_CHECK_DH_KEY); 160 break; 161 } 162 #endif 163 X509error(X509_R_UNKNOWN_KEY_TYPE); 164 } 165 166 EVP_PKEY_free(xk); 167 return (ok); 168 } 169 170 /* It seems several organisations had the same idea of including a list of 171 * extensions in a certificate request. There are at least two OIDs that are 172 * used and there may be more: so the list is configurable. 173 */ 174 175 static int ext_nid_list[] = {NID_ext_req, NID_ms_ext_req, NID_undef}; 176 177 static int *ext_nids = ext_nid_list; 178 179 int 180 X509_REQ_extension_nid(int req_nid) 181 { 182 int i, nid; 183 184 for (i = 0; ; i++) { 185 nid = ext_nids[i]; 186 if (nid == NID_undef) 187 return 0; 188 else if (req_nid == nid) 189 return 1; 190 } 191 } 192 193 int * 194 X509_REQ_get_extension_nids(void) 195 { 196 return ext_nids; 197 } 198 199 void 200 X509_REQ_set_extension_nids(int *nids) 201 { 202 ext_nids = nids; 203 } 204 205 STACK_OF(X509_EXTENSION) * 206 X509_REQ_get_extensions(X509_REQ *req) 207 { 208 X509_ATTRIBUTE *attr; 209 ASN1_TYPE *ext = NULL; 210 int idx, *pnid; 211 const unsigned char *p; 212 213 if ((req == NULL) || (req->req_info == NULL) || !ext_nids) 214 return (NULL); 215 for (pnid = ext_nids; *pnid != NID_undef; pnid++) { 216 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1); 217 if (idx == -1) 218 continue; 219 attr = X509_REQ_get_attr(req, idx); 220 if (attr->single) 221 ext = attr->value.single; 222 else if (sk_ASN1_TYPE_num(attr->value.set)) 223 ext = sk_ASN1_TYPE_value(attr->value.set, 0); 224 break; 225 } 226 if (!ext || (ext->type != V_ASN1_SEQUENCE)) 227 return NULL; 228 p = ext->value.sequence->data; 229 return (STACK_OF(X509_EXTENSION) *)ASN1_item_d2i(NULL, &p, 230 ext->value.sequence->length, &X509_EXTENSIONS_it); 231 } 232 233 /* Add a STACK_OF extensions to a certificate request: allow alternative OIDs 234 * in case we want to create a non standard one. 235 */ 236 237 int 238 X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts, 239 int nid) 240 { 241 ASN1_TYPE *at = NULL; 242 X509_ATTRIBUTE *attr = NULL; 243 244 if (!(at = ASN1_TYPE_new()) || 245 !(at->value.sequence = ASN1_STRING_new())) 246 goto err; 247 248 at->type = V_ASN1_SEQUENCE; 249 /* Generate encoding of extensions */ 250 at->value.sequence->length = ASN1_item_i2d((ASN1_VALUE *)exts, 251 &at->value.sequence->data, &X509_EXTENSIONS_it); 252 if (!(attr = X509_ATTRIBUTE_new())) 253 goto err; 254 if (!(attr->value.set = sk_ASN1_TYPE_new_null())) 255 goto err; 256 if (!sk_ASN1_TYPE_push(attr->value.set, at)) 257 goto err; 258 at = NULL; 259 attr->single = 0; 260 attr->object = OBJ_nid2obj(nid); 261 if (!req->req_info->attributes) { 262 if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null())) 263 goto err; 264 } 265 if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr)) 266 goto err; 267 return 1; 268 269 err: 270 X509_ATTRIBUTE_free(attr); 271 ASN1_TYPE_free(at); 272 return 0; 273 } 274 275 /* This is the normal usage: use the "official" OID */ 276 int 277 X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts) 278 { 279 return X509_REQ_add_extensions_nid(req, exts, NID_ext_req); 280 } 281 282 /* Request attribute functions */ 283 284 int 285 X509_REQ_get_attr_count(const X509_REQ *req) 286 { 287 return X509at_get_attr_count(req->req_info->attributes); 288 } 289 290 int 291 X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos) 292 { 293 return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos); 294 } 295 296 int 297 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, const ASN1_OBJECT *obj, 298 int lastpos) 299 { 300 return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos); 301 } 302 303 X509_ATTRIBUTE * 304 X509_REQ_get_attr(const X509_REQ *req, int loc) 305 { 306 return X509at_get_attr(req->req_info->attributes, loc); 307 } 308 309 X509_ATTRIBUTE * 310 X509_REQ_delete_attr(X509_REQ *req, int loc) 311 { 312 return X509at_delete_attr(req->req_info->attributes, loc); 313 } 314 315 int 316 X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr) 317 { 318 if (X509at_add1_attr(&req->req_info->attributes, attr)) 319 return 1; 320 return 0; 321 } 322 323 int 324 X509_REQ_add1_attr_by_OBJ(X509_REQ *req, const ASN1_OBJECT *obj, int type, 325 const unsigned char *bytes, int len) 326 { 327 if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj, 328 type, bytes, len)) 329 return 1; 330 return 0; 331 } 332 333 int 334 X509_REQ_add1_attr_by_NID(X509_REQ *req, int nid, int type, 335 const unsigned char *bytes, int len) 336 { 337 if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid, 338 type, bytes, len)) 339 return 1; 340 return 0; 341 } 342 343 int 344 X509_REQ_add1_attr_by_txt(X509_REQ *req, const char *attrname, int type, 345 const unsigned char *bytes, int len) 346 { 347 if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname, 348 type, bytes, len)) 349 return 1; 350 return 0; 351 } 352 353 int 354 i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp) 355 { 356 req->req_info->enc.modified = 1; 357 return i2d_X509_REQ_INFO(req->req_info, pp); 358 } 359