crypto/x509/x509_req.c

   1 /* crypto/x509/x509_req.c */
   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 #include "cryptlib.h"
  61 #include <openssl/bn.h>
  62 #include <openssl/evp.h>
  63 #include <openssl/asn1.h>
  64 #include <openssl/x509.h>
  65 #include <openssl/objects.h>
  66 #include <openssl/buffer.h>
  67 #include <openssl/pem.h>
  68
  69 X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
  70 {
  71     X509_REQ *ret;
  72     X509_REQ_INFO *ri;
  73     int i;
  74     EVP_PKEY *pktmp;
  75
  76     ret = X509_REQ_new();
  77     if (ret == NULL) {
  78         X509err(X509_F_X509_TO_X509_REQ, ERR_R_MALLOC_FAILURE);
  79         goto err;
  80     }
  81
  82     ri = ret->req_info;
  83
  84     ri->version->length = 1;
  85     ri->version->data = (unsigned char *)OPENSSL_malloc(1);
  86     if (ri->version->data == NULL)
  87         goto err;
  88     ri->version->data[0] = 0;   /* version == 0 */
  89
  90     if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x)))
  91         goto err;
  92
  93     pktmp = X509_get_pubkey(x);
  94     i = X509_REQ_set_pubkey(ret, pktmp);
  95     EVP_PKEY_free(pktmp);
  96     if (!i)
  97         goto err;
  98
  99     if (pkey != NULL) {
 100         if (!X509_REQ_sign(ret, pkey, md))
 101             goto err;
 102     }
 103     return (ret);
 104  err:
 105     X509_REQ_free(ret);
 106     return (NULL);
 107 }
 108
 109 EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)
 110 {
 111     if ((req == NULL) || (req->req_info == NULL))
 112         return (NULL);
 113     return (X509_PUBKEY_get(req->req_info->pubkey));
 114 }
 115
 116 int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k)
 117 {
 118     EVP_PKEY *xk = NULL;
 119     int ok = 0;
 120
 121     xk = X509_REQ_get_pubkey(x);
 122     switch (EVP_PKEY_cmp(xk, k)) {
 123     case 1:
 124         ok = 1;
 125         break;
 126     case 0:
 127         X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY,
 128                 X509_R_KEY_VALUES_MISMATCH);
 129         break;
 130     case -1:
 131         X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH);
 132         break;
 133     case -2:
 134 #ifndef OPENSSL_NO_EC
 135         if (k->type == EVP_PKEY_EC) {
 136             X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);
 137             break;
 138         }
 139 #endif
 140 #ifndef OPENSSL_NO_DH
 141         if (k->type == EVP_PKEY_DH) {
 142             /* No idea */
 143             X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY,
 144                     X509_R_CANT_CHECK_DH_KEY);
 145             break;
 146         }
 147 #endif
 148         X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE);
 149     }
 150
 151     EVP_PKEY_free(xk);
 152     return (ok);
 153 }
 154
 155 /*
 156  * It seems several organisations had the same idea of including a list of
 157  * extensions in a certificate request. There are at least two OIDs that are
 158  * used and there may be more: so the list is configurable.
 159  */
 160
 161 static int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef };
 162
 163 static int *ext_nids = ext_nid_list;
 164
 165 int X509_REQ_extension_nid(int req_nid)
 166 {
 167     int i, nid;
 168     for (i = 0;; i++) {
 169         nid = ext_nids[i];
 170         if (nid == NID_undef)
 171             return 0;
 172         else if (req_nid == nid)
 173             return 1;
 174     }
 175 }
 176
 177 int *X509_REQ_get_extension_nids(void)
 178 {
 179     return ext_nids;
 180 }
 181
 182 void X509_REQ_set_extension_nids(int *nids)
 183 {
 184     ext_nids = nids;
 185 }
 186
 187 STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
 188 {
 189     X509_ATTRIBUTE *attr;
 190     ASN1_TYPE *ext = NULL;
 191     int idx, *pnid;
 192     const unsigned char *p;
 193
 194     if ((req == NULL) || (req->req_info == NULL) || !ext_nids)
 195         return (NULL);
 196     for (pnid = ext_nids; *pnid != NID_undef; pnid++) {
 197         idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
 198         if (idx == -1)
 199             continue;
 200         attr = X509_REQ_get_attr(req, idx);
 201         if (attr->single)
 202             ext = attr->value.single;
 203         else if (sk_ASN1_TYPE_num(attr->value.set))
 204             ext = sk_ASN1_TYPE_value(attr->value.set, 0);
 205         break;
 206     }
 207     if (!ext || (ext->type != V_ASN1_SEQUENCE))
 208         return NULL;
 209     p = ext->value.sequence->data;
 210     return d2i_ASN1_SET_OF_X509_EXTENSION(NULL, &p,
 211                                           ext->value.sequence->length,
 212                                           d2i_X509_EXTENSION,
 213                                           X509_EXTENSION_free,
 214                                           V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
 215 }
 216
 217 /*
 218  * Add a STACK_OF extensions to a certificate request: allow alternative OIDs
 219  * in case we want to create a non standard one.
 220  */
 221
 222 int X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,
 223                                 int nid)
 224 {
 225     unsigned char *p = NULL, *q;
 226     long len;
 227     ASN1_TYPE *at = NULL;
 228     X509_ATTRIBUTE *attr = NULL;
 229     if (!(at = ASN1_TYPE_new()) || !(at->value.sequence = ASN1_STRING_new()))
 230         goto err;
 231
 232     at->type = V_ASN1_SEQUENCE;
 233     /* Generate encoding of extensions */
 234     len = i2d_ASN1_SET_OF_X509_EXTENSION(exts, NULL, i2d_X509_EXTENSION,
 235                                          V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
 236                                          IS_SEQUENCE);
 237     if (!(p = OPENSSL_malloc(len)))
 238         goto err;
 239     q = p;
 240     i2d_ASN1_SET_OF_X509_EXTENSION(exts, &q, i2d_X509_EXTENSION,
 241                                    V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
 242                                    IS_SEQUENCE);
 243     at->value.sequence->data = p;
 244     p = NULL;
 245     at->value.sequence->length = len;
 246     if (!(attr = X509_ATTRIBUTE_new()))
 247         goto err;
 248     if (!(attr->value.set = sk_ASN1_TYPE_new_null()))
 249         goto err;
 250     if (!sk_ASN1_TYPE_push(attr->value.set, at))
 251         goto err;
 252     at = NULL;
 253     attr->single = 0;
 254     attr->object = OBJ_nid2obj(nid);
 255     if (!req->req_info->attributes) {
 256         if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null()))
 257             goto err;
 258     }
 259     if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr))
 260         goto err;
 261     return 1;
 262  err:
 263     if (p)
 264         OPENSSL_free(p);
 265     X509_ATTRIBUTE_free(attr);
 266     ASN1_TYPE_free(at);
 267     return 0;
 268 }
 269
 270 /* This is the normal usage: use the "official" OID */
 271 int X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)
 272 {
 273     return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
 274 }
 275
 276 /* Request attribute functions */
 277
 278 int X509_REQ_get_attr_count(const X509_REQ *req)
 279 {
 280     return X509at_get_attr_count(req->req_info->attributes);
 281 }
 282
 283 int 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 X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj,
 289                              int lastpos)
 290 {
 291     return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);
 292 }
 293
 294 X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
 295 {
 296     return X509at_get_attr(req->req_info->attributes, loc);
 297 }
 298
 299 X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
 300 {
 301     return X509at_delete_attr(req->req_info->attributes, loc);
 302 }
 303
 304 int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
 305 {
 306     if (X509at_add1_attr(&req->req_info->attributes, attr))
 307         return 1;
 308     return 0;
 309 }
 310
 311 int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
 312                               const ASN1_OBJECT *obj, int type,
 313                               const unsigned char *bytes, int len)
 314 {
 315     if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,
 316                                 type, bytes, len))
 317         return 1;
 318     return 0;
 319 }
 320
 321 int X509_REQ_add1_attr_by_NID(X509_REQ *req,
 322                               int nid, int type,
 323                               const unsigned char *bytes, int len)
 324 {
 325     if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid,
 326                                 type, bytes, len))
 327         return 1;
 328     return 0;
 329 }
 330
 331 int X509_REQ_add1_attr_by_txt(X509_REQ *req,
 332                               const char *attrname, int type,
 333                               const unsigned char *bytes, int len)
 334 {
 335     if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,
 336                                 type, bytes, len))
 337         return 1;
 338     return 0;
 339 }