1 /* $OpenBSD: x509_req.c,v 1.24 2021/11/01 20:53:08 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 #include "x509_lcl.h" 74 75 X509_REQ * 76 X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md) 77 { 78 X509_REQ *ret; 79 X509_REQ_INFO *ri; 80 int i; 81 EVP_PKEY *pktmp; 82 83 ret = X509_REQ_new(); 84 if (ret == NULL) { 85 X509error(ERR_R_MALLOC_FAILURE); 86 goto err; 87 } 88 89 ri = ret->req_info; 90 91 if ((ri->version = ASN1_INTEGER_new()) == NULL) 92 goto err; 93 if (ASN1_INTEGER_set(ri->version, 0) == 0) 94 goto err; 95 96 if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x))) 97 goto err; 98 99 if ((pktmp = X509_get_pubkey(x)) == NULL) 100 goto err; 101 102 i = X509_REQ_set_pubkey(ret, pktmp); 103 EVP_PKEY_free(pktmp); 104 if (!i) 105 goto err; 106 107 if (pkey != NULL) { 108 if (!X509_REQ_sign(ret, pkey, md)) 109 goto err; 110 } 111 return (ret); 112 113 err: 114 X509_REQ_free(ret); 115 return (NULL); 116 } 117 118 EVP_PKEY * 119 X509_REQ_get_pubkey(X509_REQ *req) 120 { 121 if ((req == NULL) || (req->req_info == NULL)) 122 return (NULL); 123 return (X509_PUBKEY_get(req->req_info->pubkey)); 124 } 125 126 EVP_PKEY * 127 X509_REQ_get0_pubkey(X509_REQ *req) 128 { 129 if (req == NULL || req->req_info == NULL) 130 return NULL; 131 return X509_PUBKEY_get0(req->req_info->pubkey); 132 } 133 134 int 135 X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k) 136 { 137 EVP_PKEY *xk = NULL; 138 int ok = 0; 139 140 xk = X509_REQ_get_pubkey(x); 141 switch (EVP_PKEY_cmp(xk, k)) { 142 case 1: 143 ok = 1; 144 break; 145 case 0: 146 X509error(X509_R_KEY_VALUES_MISMATCH); 147 break; 148 case -1: 149 X509error(X509_R_KEY_TYPE_MISMATCH); 150 break; 151 case -2: 152 #ifndef OPENSSL_NO_EC 153 if (k->type == EVP_PKEY_EC) { 154 X509error(ERR_R_EC_LIB); 155 break; 156 } 157 #endif 158 #ifndef OPENSSL_NO_DH 159 if (k->type == EVP_PKEY_DH) { 160 /* No idea */ 161 X509error(X509_R_CANT_CHECK_DH_KEY); 162 break; 163 } 164 #endif 165 X509error(X509_R_UNKNOWN_KEY_TYPE); 166 } 167 168 EVP_PKEY_free(xk); 169 return (ok); 170 } 171 172 /* It seems several organisations had the same idea of including a list of 173 * extensions in a certificate request. There are at least two OIDs that are 174 * used and there may be more: so the list is configurable. 175 */ 176 177 static int ext_nid_list[] = {NID_ext_req, NID_ms_ext_req, NID_undef}; 178 179 static int *ext_nids = ext_nid_list; 180 181 int 182 X509_REQ_extension_nid(int req_nid) 183 { 184 int i, nid; 185 186 for (i = 0; ; i++) { 187 nid = ext_nids[i]; 188 if (nid == NID_undef) 189 return 0; 190 else if (req_nid == nid) 191 return 1; 192 } 193 } 194 195 int * 196 X509_REQ_get_extension_nids(void) 197 { 198 return ext_nids; 199 } 200 201 void 202 X509_REQ_set_extension_nids(int *nids) 203 { 204 ext_nids = nids; 205 } 206 207 STACK_OF(X509_EXTENSION) * 208 X509_REQ_get_extensions(X509_REQ *req) 209 { 210 X509_ATTRIBUTE *attr; 211 ASN1_TYPE *ext = NULL; 212 int idx, *pnid; 213 const unsigned char *p; 214 215 if ((req == NULL) || (req->req_info == NULL) || !ext_nids) 216 return (NULL); 217 for (pnid = ext_nids; *pnid != NID_undef; pnid++) { 218 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1); 219 if (idx == -1) 220 continue; 221 attr = X509_REQ_get_attr(req, idx); 222 if (attr->single) 223 ext = attr->value.single; 224 else if (sk_ASN1_TYPE_num(attr->value.set)) 225 ext = sk_ASN1_TYPE_value(attr->value.set, 0); 226 break; 227 } 228 if (!ext || (ext->type != V_ASN1_SEQUENCE)) 229 return NULL; 230 p = ext->value.sequence->data; 231 return (STACK_OF(X509_EXTENSION) *)ASN1_item_d2i(NULL, &p, 232 ext->value.sequence->length, &X509_EXTENSIONS_it); 233 } 234 235 /* Add a STACK_OF extensions to a certificate request: allow alternative OIDs 236 * in case we want to create a non standard one. 237 */ 238 239 int 240 X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts, 241 int nid) 242 { 243 ASN1_TYPE *at = NULL; 244 X509_ATTRIBUTE *attr = NULL; 245 246 if (!(at = ASN1_TYPE_new()) || 247 !(at->value.sequence = ASN1_STRING_new())) 248 goto err; 249 250 at->type = V_ASN1_SEQUENCE; 251 /* Generate encoding of extensions */ 252 at->value.sequence->length = ASN1_item_i2d((ASN1_VALUE *)exts, 253 &at->value.sequence->data, &X509_EXTENSIONS_it); 254 if (!(attr = X509_ATTRIBUTE_new())) 255 goto err; 256 if (!(attr->value.set = sk_ASN1_TYPE_new_null())) 257 goto err; 258 if (!sk_ASN1_TYPE_push(attr->value.set, at)) 259 goto err; 260 at = NULL; 261 attr->single = 0; 262 attr->object = OBJ_nid2obj(nid); 263 if (!req->req_info->attributes) { 264 if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null())) 265 goto err; 266 } 267 if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr)) 268 goto err; 269 return 1; 270 271 err: 272 X509_ATTRIBUTE_free(attr); 273 ASN1_TYPE_free(at); 274 return 0; 275 } 276 277 /* This is the normal usage: use the "official" OID */ 278 int 279 X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts) 280 { 281 return X509_REQ_add_extensions_nid(req, exts, NID_ext_req); 282 } 283 284 /* Request attribute functions */ 285 286 int 287 X509_REQ_get_attr_count(const X509_REQ *req) 288 { 289 return X509at_get_attr_count(req->req_info->attributes); 290 } 291 292 int 293 X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos) 294 { 295 return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos); 296 } 297 298 int 299 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, const ASN1_OBJECT *obj, 300 int lastpos) 301 { 302 return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos); 303 } 304 305 X509_ATTRIBUTE * 306 X509_REQ_get_attr(const X509_REQ *req, int loc) 307 { 308 return X509at_get_attr(req->req_info->attributes, loc); 309 } 310 311 X509_ATTRIBUTE * 312 X509_REQ_delete_attr(X509_REQ *req, int loc) 313 { 314 return X509at_delete_attr(req->req_info->attributes, loc); 315 } 316 317 int 318 X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr) 319 { 320 if (X509at_add1_attr(&req->req_info->attributes, attr)) 321 return 1; 322 return 0; 323 } 324 325 int 326 X509_REQ_add1_attr_by_OBJ(X509_REQ *req, const ASN1_OBJECT *obj, int type, 327 const unsigned char *bytes, int len) 328 { 329 if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj, 330 type, bytes, len)) 331 return 1; 332 return 0; 333 } 334 335 int 336 X509_REQ_add1_attr_by_NID(X509_REQ *req, int nid, int type, 337 const unsigned char *bytes, int len) 338 { 339 if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid, 340 type, bytes, len)) 341 return 1; 342 return 0; 343 } 344 345 int 346 X509_REQ_add1_attr_by_txt(X509_REQ *req, const char *attrname, int type, 347 const unsigned char *bytes, int len) 348 { 349 if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname, 350 type, bytes, len)) 351 return 1; 352 return 0; 353 } 354 355 int 356 i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp) 357 { 358 req->req_info->enc.modified = 1; 359 return i2d_X509_REQ_INFO(req->req_info, pp); 360 } 361