crypto/libressl/crypto/x509/x509_req.c

   1 /* $OpenBSD: x509_req.c,v 1.29 2022/08/18 16:26:33 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         if ((xk = X509_REQ_get0_pubkey(x)) == NULL)
 142                 return 0;
 143
 144         switch (EVP_PKEY_cmp(xk, k)) {
 145         case 1:
 146                 ok = 1;
 147                 break;
 148         case 0:
 149                 X509error(X509_R_KEY_VALUES_MISMATCH);
 150                 break;
 151         case -1:
 152                 X509error(X509_R_KEY_TYPE_MISMATCH);
 153                 break;
 154         case -2:
 155 #ifndef OPENSSL_NO_EC
 156                 if (k->type == EVP_PKEY_EC) {
 157                         X509error(ERR_R_EC_LIB);
 158                         break;
 159                 }
 160 #endif
 161 #ifndef OPENSSL_NO_DH
 162                 if (k->type == EVP_PKEY_DH) {
 163                         /* No idea */
 164                         X509error(X509_R_CANT_CHECK_DH_KEY);
 165                         break;
 166                 }
 167 #endif
 168                 X509error(X509_R_UNKNOWN_KEY_TYPE);
 169         }
 170
 171         return (ok);
 172 }
 173
 174 /* It seems several organisations had the same idea of including a list of
 175  * extensions in a certificate request. There are at least two OIDs that are
 176  * used and there may be more: so the list is configurable.
 177  */
 178
 179 static int ext_nid_list[] = {NID_ext_req, NID_ms_ext_req, NID_undef};
 180
 181 static int *ext_nids = ext_nid_list;
 182
 183 int
 184 X509_REQ_extension_nid(int req_nid)
 185 {
 186         int i, nid;
 187
 188         for (i = 0; ; i++) {
 189                 nid = ext_nids[i];
 190                 if (nid == NID_undef)
 191                         return 0;
 192                 else if (req_nid == nid)
 193                         return 1;
 194         }
 195 }
 196
 197 int *
 198 X509_REQ_get_extension_nids(void)
 199 {
 200         return ext_nids;
 201 }
 202
 203 void
 204 X509_REQ_set_extension_nids(int *nids)
 205 {
 206         ext_nids = nids;
 207 }
 208
 209 STACK_OF(X509_EXTENSION) *
 210 X509_REQ_get_extensions(X509_REQ *req)
 211 {
 212         X509_ATTRIBUTE *attr;
 213         ASN1_TYPE *ext = NULL;
 214         int idx, *pnid;
 215         const unsigned char *p;
 216
 217         if (req == NULL || req->req_info == NULL || ext_nids == NULL)
 218                 return NULL;
 219         for (pnid = ext_nids; *pnid != NID_undef; pnid++) {
 220                 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
 221                 if (idx == -1)
 222                         continue;
 223                 attr = X509_REQ_get_attr(req, idx);
 224                 ext = X509_ATTRIBUTE_get0_type(attr, 0);
 225                 break;
 226         }
 227         if (ext == NULL)
 228                 return sk_X509_EXTENSION_new_null();
 229         if (ext->type != V_ASN1_SEQUENCE)
 230                 return NULL;
 231         p = ext->value.sequence->data;
 232         return d2i_X509_EXTENSIONS(NULL, &p, ext->value.sequence->length);
 233 }
 234
 235 /*
 236  * Add a STACK_OF extensions to a certificate request: allow alternative OIDs
 237  * in case we want to create a non-standard one.
 238  */
 239
 240 int
 241 X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,
 242     int nid)
 243 {
 244         unsigned char *ext = NULL;
 245         int extlen;
 246         int rv;
 247
 248         extlen = i2d_X509_EXTENSIONS(exts, &ext);
 249         if (extlen <= 0)
 250                 return 0;
 251
 252         rv = X509_REQ_add1_attr_by_NID(req, nid, V_ASN1_SEQUENCE, ext, extlen);
 253         free(ext);
 254
 255         return rv;
 256 }
 257
 258 /* This is the normal usage: use the "official" OID */
 259 int
 260 X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)
 261 {
 262         return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
 263 }
 264
 265 /* Request attribute functions */
 266
 267 int
 268 X509_REQ_get_attr_count(const X509_REQ *req)
 269 {
 270         return X509at_get_attr_count(req->req_info->attributes);
 271 }
 272
 273 int
 274 X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos)
 275 {
 276         return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos);
 277 }
 278
 279 int
 280 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, const ASN1_OBJECT *obj,
 281     int lastpos)
 282 {
 283         return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);
 284 }
 285
 286 X509_ATTRIBUTE *
 287 X509_REQ_get_attr(const X509_REQ *req, int loc)
 288 {
 289         return X509at_get_attr(req->req_info->attributes, loc);
 290 }
 291
 292 X509_ATTRIBUTE *
 293 X509_REQ_delete_attr(X509_REQ *req, int loc)
 294 {
 295         return X509at_delete_attr(req->req_info->attributes, loc);
 296 }
 297
 298 int
 299 X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
 300 {
 301         if (X509at_add1_attr(&req->req_info->attributes, attr))
 302                 return 1;
 303         return 0;
 304 }
 305
 306 int
 307 X509_REQ_add1_attr_by_OBJ(X509_REQ *req, const ASN1_OBJECT *obj, int type,
 308     const unsigned char *bytes, int len)
 309 {
 310         if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,
 311             type, bytes, len))
 312                 return 1;
 313         return 0;
 314 }
 315
 316 int
 317 X509_REQ_add1_attr_by_NID(X509_REQ *req, int nid, int type,
 318     const unsigned char *bytes, int len)
 319 {
 320         if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid,
 321             type, bytes, len))
 322                 return 1;
 323         return 0;
 324 }
 325
 326 int
 327 X509_REQ_add1_attr_by_txt(X509_REQ *req, const char *attrname, int type,
 328     const unsigned char *bytes, int len)
 329 {
 330         if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,
 331             type, bytes, len))
 332                 return 1;
 333         return 0;
 334 }
 335
 336 int
 337 i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp)
 338 {
 339         req->req_info->enc.modified = 1;
 340         return i2d_X509_REQ_INFO(req->req_info, pp);
 341 }