1 /* $OpenBSD: x509_req.c,v 1.27 2021/12/12 21:30:14 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 "evp_locl.h" 74 #include "x509_lcl.h" 75 76 X509_REQ * 77 X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md) 78 { 79 X509_REQ *ret; 80 X509_REQ_INFO *ri; 81 int i; 82 EVP_PKEY *pktmp; 83 84 ret = X509_REQ_new(); 85 if (ret == NULL) { 86 X509error(ERR_R_MALLOC_FAILURE); 87 goto err; 88 } 89 90 ri = ret->req_info; 91 92 if ((ri->version = ASN1_INTEGER_new()) == NULL) 93 goto err; 94 if (ASN1_INTEGER_set(ri->version, 0) == 0) 95 goto err; 96 97 if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x))) 98 goto err; 99 100 if ((pktmp = X509_get_pubkey(x)) == NULL) 101 goto err; 102 103 i = X509_REQ_set_pubkey(ret, pktmp); 104 EVP_PKEY_free(pktmp); 105 if (!i) 106 goto err; 107 108 if (pkey != NULL) { 109 if (!X509_REQ_sign(ret, pkey, md)) 110 goto err; 111 } 112 return (ret); 113 114 err: 115 X509_REQ_free(ret); 116 return (NULL); 117 } 118 119 EVP_PKEY * 120 X509_REQ_get_pubkey(X509_REQ *req) 121 { 122 if ((req == NULL) || (req->req_info == NULL)) 123 return (NULL); 124 return (X509_PUBKEY_get(req->req_info->pubkey)); 125 } 126 127 EVP_PKEY * 128 X509_REQ_get0_pubkey(X509_REQ *req) 129 { 130 if (req == NULL || req->req_info == NULL) 131 return NULL; 132 return X509_PUBKEY_get0(req->req_info->pubkey); 133 } 134 135 int 136 X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k) 137 { 138 EVP_PKEY *xk = NULL; 139 int ok = 0; 140 141 xk = X509_REQ_get_pubkey(x); 142 switch (EVP_PKEY_cmp(xk, k)) { 143 case 1: 144 ok = 1; 145 break; 146 case 0: 147 X509error(X509_R_KEY_VALUES_MISMATCH); 148 break; 149 case -1: 150 X509error(X509_R_KEY_TYPE_MISMATCH); 151 break; 152 case -2: 153 #ifndef OPENSSL_NO_EC 154 if (k->type == EVP_PKEY_EC) { 155 X509error(ERR_R_EC_LIB); 156 break; 157 } 158 #endif 159 #ifndef OPENSSL_NO_DH 160 if (k->type == EVP_PKEY_DH) { 161 /* No idea */ 162 X509error(X509_R_CANT_CHECK_DH_KEY); 163 break; 164 } 165 #endif 166 X509error(X509_R_UNKNOWN_KEY_TYPE); 167 } 168 169 EVP_PKEY_free(xk); 170 return (ok); 171 } 172 173 /* It seems several organisations had the same idea of including a list of 174 * extensions in a certificate request. There are at least two OIDs that are 175 * used and there may be more: so the list is configurable. 176 */ 177 178 static int ext_nid_list[] = {NID_ext_req, NID_ms_ext_req, NID_undef}; 179 180 static int *ext_nids = ext_nid_list; 181 182 int 183 X509_REQ_extension_nid(int req_nid) 184 { 185 int i, nid; 186 187 for (i = 0; ; i++) { 188 nid = ext_nids[i]; 189 if (nid == NID_undef) 190 return 0; 191 else if (req_nid == nid) 192 return 1; 193 } 194 } 195 196 int * 197 X509_REQ_get_extension_nids(void) 198 { 199 return ext_nids; 200 } 201 202 void 203 X509_REQ_set_extension_nids(int *nids) 204 { 205 ext_nids = nids; 206 } 207 208 STACK_OF(X509_EXTENSION) * 209 X509_REQ_get_extensions(X509_REQ *req) 210 { 211 X509_ATTRIBUTE *attr; 212 ASN1_TYPE *ext = NULL; 213 int idx, *pnid; 214 const unsigned char *p; 215 216 if (req == NULL || req->req_info == NULL || ext_nids == NULL) 217 return NULL; 218 for (pnid = ext_nids; *pnid != NID_undef; pnid++) { 219 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1); 220 if (idx == -1) 221 continue; 222 attr = X509_REQ_get_attr(req, idx); 223 ext = X509_ATTRIBUTE_get0_type(attr, 0); 224 break; 225 } 226 if (ext == NULL || ext->type != V_ASN1_SEQUENCE) 227 return NULL; 228 p = ext->value.sequence->data; 229 return d2i_X509_EXTENSIONS(NULL, &p, ext->value.sequence->length); 230 } 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 unsigned char *ext = NULL; 242 int extlen; 243 int rv; 244 245 extlen = i2d_X509_EXTENSIONS(exts, &ext); 246 if (extlen <= 0) 247 return 0; 248 249 rv = X509_REQ_add1_attr_by_NID(req, nid, V_ASN1_SEQUENCE, ext, extlen); 250 free(ext); 251 252 return rv; 253 } 254 255 /* This is the normal usage: use the "official" OID */ 256 int 257 X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts) 258 { 259 return X509_REQ_add_extensions_nid(req, exts, NID_ext_req); 260 } 261 262 /* Request attribute functions */ 263 264 int 265 X509_REQ_get_attr_count(const X509_REQ *req) 266 { 267 return X509at_get_attr_count(req->req_info->attributes); 268 } 269 270 int 271 X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos) 272 { 273 return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos); 274 } 275 276 int 277 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, const ASN1_OBJECT *obj, 278 int lastpos) 279 { 280 return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos); 281 } 282 283 X509_ATTRIBUTE * 284 X509_REQ_get_attr(const X509_REQ *req, int loc) 285 { 286 return X509at_get_attr(req->req_info->attributes, loc); 287 } 288 289 X509_ATTRIBUTE * 290 X509_REQ_delete_attr(X509_REQ *req, int loc) 291 { 292 return X509at_delete_attr(req->req_info->attributes, loc); 293 } 294 295 int 296 X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr) 297 { 298 if (X509at_add1_attr(&req->req_info->attributes, attr)) 299 return 1; 300 return 0; 301 } 302 303 int 304 X509_REQ_add1_attr_by_OBJ(X509_REQ *req, const ASN1_OBJECT *obj, int type, 305 const unsigned char *bytes, int len) 306 { 307 if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj, 308 type, bytes, len)) 309 return 1; 310 return 0; 311 } 312 313 int 314 X509_REQ_add1_attr_by_NID(X509_REQ *req, int nid, int type, 315 const unsigned char *bytes, int len) 316 { 317 if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid, 318 type, bytes, len)) 319 return 1; 320 return 0; 321 } 322 323 int 324 X509_REQ_add1_attr_by_txt(X509_REQ *req, const char *attrname, int type, 325 const unsigned char *bytes, int len) 326 { 327 if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname, 328 type, bytes, len)) 329 return 1; 330 return 0; 331 } 332 333 int 334 i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp) 335 { 336 req->req_info->enc.modified = 1; 337 return i2d_X509_REQ_INFO(req->req_info, pp); 338 } 339