1 /* $OpenBSD: x_x509.c,v 1.28 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/asn1t.h> 64 #include <openssl/evp.h> 65 #include <openssl/x509.h> 66 #include <openssl/x509v3.h> 67 68 static const ASN1_AUX X509_CINF_aux = { 69 .flags = ASN1_AFLG_ENCODING, 70 .enc_offset = offsetof(X509_CINF, enc), 71 }; 72 static const ASN1_TEMPLATE X509_CINF_seq_tt[] = { 73 { 74 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 75 .offset = offsetof(X509_CINF, version), 76 .field_name = "version", 77 .item = &ASN1_INTEGER_it, 78 }, 79 { 80 .offset = offsetof(X509_CINF, serialNumber), 81 .field_name = "serialNumber", 82 .item = &ASN1_INTEGER_it, 83 }, 84 { 85 .offset = offsetof(X509_CINF, signature), 86 .field_name = "signature", 87 .item = &X509_ALGOR_it, 88 }, 89 { 90 .offset = offsetof(X509_CINF, issuer), 91 .field_name = "issuer", 92 .item = &X509_NAME_it, 93 }, 94 { 95 .offset = offsetof(X509_CINF, validity), 96 .field_name = "validity", 97 .item = &X509_VAL_it, 98 }, 99 { 100 .offset = offsetof(X509_CINF, subject), 101 .field_name = "subject", 102 .item = &X509_NAME_it, 103 }, 104 { 105 .offset = offsetof(X509_CINF, key), 106 .field_name = "key", 107 .item = &X509_PUBKEY_it, 108 }, 109 { 110 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL, 111 .tag = 1, 112 .offset = offsetof(X509_CINF, issuerUID), 113 .field_name = "issuerUID", 114 .item = &ASN1_BIT_STRING_it, 115 }, 116 { 117 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL, 118 .tag = 2, 119 .offset = offsetof(X509_CINF, subjectUID), 120 .field_name = "subjectUID", 121 .item = &ASN1_BIT_STRING_it, 122 }, 123 { 124 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_SEQUENCE_OF | 125 ASN1_TFLG_OPTIONAL, 126 .tag = 3, 127 .offset = offsetof(X509_CINF, extensions), 128 .field_name = "extensions", 129 .item = &X509_EXTENSION_it, 130 }, 131 }; 132 133 const ASN1_ITEM X509_CINF_it = { 134 .itype = ASN1_ITYPE_SEQUENCE, 135 .utype = V_ASN1_SEQUENCE, 136 .templates = X509_CINF_seq_tt, 137 .tcount = sizeof(X509_CINF_seq_tt) / sizeof(ASN1_TEMPLATE), 138 .funcs = &X509_CINF_aux, 139 .size = sizeof(X509_CINF), 140 .sname = "X509_CINF", 141 }; 142 143 144 X509_CINF * 145 d2i_X509_CINF(X509_CINF **a, const unsigned char **in, long len) 146 { 147 return (X509_CINF *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 148 &X509_CINF_it); 149 } 150 151 int 152 i2d_X509_CINF(X509_CINF *a, unsigned char **out) 153 { 154 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_CINF_it); 155 } 156 157 X509_CINF * 158 X509_CINF_new(void) 159 { 160 return (X509_CINF *)ASN1_item_new(&X509_CINF_it); 161 } 162 163 void 164 X509_CINF_free(X509_CINF *a) 165 { 166 ASN1_item_free((ASN1_VALUE *)a, &X509_CINF_it); 167 } 168 /* X509 top level structure needs a bit of customisation */ 169 170 extern void policy_cache_free(X509_POLICY_CACHE *cache); 171 172 static int 173 x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 174 { 175 X509 *ret = (X509 *)*pval; 176 177 switch (operation) { 178 179 case ASN1_OP_NEW_POST: 180 ret->valid = 0; 181 ret->name = NULL; 182 ret->ex_flags = 0; 183 ret->ex_pathlen = -1; 184 ret->skid = NULL; 185 ret->akid = NULL; 186 ret->aux = NULL; 187 ret->crldp = NULL; 188 #ifndef OPENSSL_NO_RFC3779 189 ret->rfc3779_addr = NULL; 190 ret->rfc3779_asid = NULL; 191 #endif 192 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data); 193 break; 194 195 case ASN1_OP_D2I_POST: 196 free(ret->name); 197 ret->name = X509_NAME_oneline(ret->cert_info->subject, NULL, 0); 198 break; 199 200 case ASN1_OP_FREE_POST: 201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data); 202 X509_CERT_AUX_free(ret->aux); 203 ASN1_OCTET_STRING_free(ret->skid); 204 AUTHORITY_KEYID_free(ret->akid); 205 CRL_DIST_POINTS_free(ret->crldp); 206 policy_cache_free(ret->policy_cache); 207 GENERAL_NAMES_free(ret->altname); 208 NAME_CONSTRAINTS_free(ret->nc); 209 #ifndef OPENSSL_NO_RFC3779 210 sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free); 211 ASIdentifiers_free(ret->rfc3779_asid); 212 #endif 213 free(ret->name); 214 ret->name = NULL; 215 break; 216 } 217 218 return 1; 219 } 220 221 static const ASN1_AUX X509_aux = { 222 .app_data = NULL, 223 .flags = ASN1_AFLG_REFCOUNT, 224 .ref_offset = offsetof(X509, references), 225 .ref_lock = CRYPTO_LOCK_X509, 226 .asn1_cb = x509_cb, 227 }; 228 static const ASN1_TEMPLATE X509_seq_tt[] = { 229 { 230 .offset = offsetof(X509, cert_info), 231 .field_name = "cert_info", 232 .item = &X509_CINF_it, 233 }, 234 { 235 .offset = offsetof(X509, sig_alg), 236 .field_name = "sig_alg", 237 .item = &X509_ALGOR_it, 238 }, 239 { 240 .offset = offsetof(X509, signature), 241 .field_name = "signature", 242 .item = &ASN1_BIT_STRING_it, 243 }, 244 }; 245 246 const ASN1_ITEM X509_it = { 247 .itype = ASN1_ITYPE_SEQUENCE, 248 .utype = V_ASN1_SEQUENCE, 249 .templates = X509_seq_tt, 250 .tcount = sizeof(X509_seq_tt) / sizeof(ASN1_TEMPLATE), 251 .funcs = &X509_aux, 252 .size = sizeof(X509), 253 .sname = "X509", 254 }; 255 256 257 X509 * 258 d2i_X509(X509 **a, const unsigned char **in, long len) 259 { 260 return (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 261 &X509_it); 262 } 263 264 int 265 i2d_X509(X509 *a, unsigned char **out) 266 { 267 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_it); 268 } 269 270 X509 * 271 X509_new(void) 272 { 273 return (X509 *)ASN1_item_new(&X509_it); 274 } 275 276 void 277 X509_free(X509 *a) 278 { 279 ASN1_item_free((ASN1_VALUE *)a, &X509_it); 280 } 281 282 X509 * 283 X509_dup(X509 *x) 284 { 285 return ASN1_item_dup(&X509_it, x); 286 } 287 288 int 289 X509_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 290 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 291 { 292 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509, argl, argp, 293 new_func, dup_func, free_func); 294 } 295 296 int 297 X509_set_ex_data(X509 *r, int idx, void *arg) 298 { 299 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg)); 300 } 301 302 void * 303 X509_get_ex_data(X509 *r, int idx) 304 { 305 return (CRYPTO_get_ex_data(&r->ex_data, idx)); 306 } 307 308 /* X509_AUX ASN1 routines. X509_AUX is the name given to 309 * a certificate with extra info tagged on the end. Since these 310 * functions set how a certificate is trusted they should only 311 * be used when the certificate comes from a reliable source 312 * such as local storage. 313 * 314 */ 315 316 X509 * 317 d2i_X509_AUX(X509 **a, const unsigned char **pp, long length) 318 { 319 const unsigned char *q; 320 X509 *ret; 321 322 /* Save start position */ 323 q = *pp; 324 ret = d2i_X509(NULL, pp, length); 325 /* If certificate unreadable then forget it */ 326 if (!ret) 327 return NULL; 328 /* update length */ 329 length -= *pp - q; 330 if (length > 0) { 331 if (!d2i_X509_CERT_AUX(&ret->aux, pp, length)) 332 goto err; 333 } 334 if (a != NULL) { 335 X509_free(*a); 336 *a = ret; 337 } 338 return ret; 339 340 err: 341 X509_free(ret); 342 return NULL; 343 } 344 345 int 346 i2d_X509_AUX(X509 *a, unsigned char **pp) 347 { 348 int length; 349 350 length = i2d_X509(a, pp); 351 if (a) 352 length += i2d_X509_CERT_AUX(a->aux, pp); 353 return length; 354 } 355 356 int 357 i2d_re_X509_tbs(X509 *x, unsigned char **pp) 358 { 359 x->cert_info->enc.modified = 1; 360 return i2d_X509_CINF(x->cert_info, pp); 361 } 362 363 void 364 X509_get0_signature(const ASN1_BIT_STRING **psig, const X509_ALGOR **palg, 365 const X509 *x) 366 { 367 if (psig != NULL) 368 *psig = x->signature; 369 if (palg != NULL) 370 *palg = x->sig_alg; 371 } 372 373 int 374 X509_get_signature_nid(const X509 *x) 375 { 376 return OBJ_obj2nid(x->sig_alg->algorithm); 377 } 378