1 /* $OpenBSD: x_x509.c,v 1.30 2021/12/25 13:17:48 jsing 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 #include "x509_lcl.h" 69 70 static const ASN1_AUX X509_CINF_aux = { 71 .flags = ASN1_AFLG_ENCODING, 72 .enc_offset = offsetof(X509_CINF, enc), 73 }; 74 static const ASN1_TEMPLATE X509_CINF_seq_tt[] = { 75 { 76 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL, 77 .offset = offsetof(X509_CINF, version), 78 .field_name = "version", 79 .item = &ASN1_INTEGER_it, 80 }, 81 { 82 .offset = offsetof(X509_CINF, serialNumber), 83 .field_name = "serialNumber", 84 .item = &ASN1_INTEGER_it, 85 }, 86 { 87 .offset = offsetof(X509_CINF, signature), 88 .field_name = "signature", 89 .item = &X509_ALGOR_it, 90 }, 91 { 92 .offset = offsetof(X509_CINF, issuer), 93 .field_name = "issuer", 94 .item = &X509_NAME_it, 95 }, 96 { 97 .offset = offsetof(X509_CINF, validity), 98 .field_name = "validity", 99 .item = &X509_VAL_it, 100 }, 101 { 102 .offset = offsetof(X509_CINF, subject), 103 .field_name = "subject", 104 .item = &X509_NAME_it, 105 }, 106 { 107 .offset = offsetof(X509_CINF, key), 108 .field_name = "key", 109 .item = &X509_PUBKEY_it, 110 }, 111 { 112 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL, 113 .tag = 1, 114 .offset = offsetof(X509_CINF, issuerUID), 115 .field_name = "issuerUID", 116 .item = &ASN1_BIT_STRING_it, 117 }, 118 { 119 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL, 120 .tag = 2, 121 .offset = offsetof(X509_CINF, subjectUID), 122 .field_name = "subjectUID", 123 .item = &ASN1_BIT_STRING_it, 124 }, 125 { 126 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_SEQUENCE_OF | 127 ASN1_TFLG_OPTIONAL, 128 .tag = 3, 129 .offset = offsetof(X509_CINF, extensions), 130 .field_name = "extensions", 131 .item = &X509_EXTENSION_it, 132 }, 133 }; 134 135 const ASN1_ITEM X509_CINF_it = { 136 .itype = ASN1_ITYPE_SEQUENCE, 137 .utype = V_ASN1_SEQUENCE, 138 .templates = X509_CINF_seq_tt, 139 .tcount = sizeof(X509_CINF_seq_tt) / sizeof(ASN1_TEMPLATE), 140 .funcs = &X509_CINF_aux, 141 .size = sizeof(X509_CINF), 142 .sname = "X509_CINF", 143 }; 144 145 146 X509_CINF * 147 d2i_X509_CINF(X509_CINF **a, const unsigned char **in, long len) 148 { 149 return (X509_CINF *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 150 &X509_CINF_it); 151 } 152 153 int 154 i2d_X509_CINF(X509_CINF *a, unsigned char **out) 155 { 156 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_CINF_it); 157 } 158 159 X509_CINF * 160 X509_CINF_new(void) 161 { 162 return (X509_CINF *)ASN1_item_new(&X509_CINF_it); 163 } 164 165 void 166 X509_CINF_free(X509_CINF *a) 167 { 168 ASN1_item_free((ASN1_VALUE *)a, &X509_CINF_it); 169 } 170 /* X509 top level structure needs a bit of customisation */ 171 172 extern void policy_cache_free(X509_POLICY_CACHE *cache); 173 174 static int 175 x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 176 { 177 X509 *ret = (X509 *)*pval; 178 179 switch (operation) { 180 181 case ASN1_OP_NEW_POST: 182 ret->valid = 0; 183 ret->name = NULL; 184 ret->ex_flags = 0; 185 ret->ex_pathlen = -1; 186 ret->skid = NULL; 187 ret->akid = NULL; 188 ret->aux = NULL; 189 ret->crldp = NULL; 190 #ifndef OPENSSL_NO_RFC3779 191 ret->rfc3779_addr = NULL; 192 ret->rfc3779_asid = NULL; 193 #endif 194 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data); 195 break; 196 197 case ASN1_OP_D2I_POST: 198 free(ret->name); 199 ret->name = X509_NAME_oneline(ret->cert_info->subject, NULL, 0); 200 break; 201 202 case ASN1_OP_FREE_POST: 203 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data); 204 X509_CERT_AUX_free(ret->aux); 205 ASN1_OCTET_STRING_free(ret->skid); 206 AUTHORITY_KEYID_free(ret->akid); 207 CRL_DIST_POINTS_free(ret->crldp); 208 policy_cache_free(ret->policy_cache); 209 GENERAL_NAMES_free(ret->altname); 210 NAME_CONSTRAINTS_free(ret->nc); 211 #ifndef OPENSSL_NO_RFC3779 212 sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free); 213 ASIdentifiers_free(ret->rfc3779_asid); 214 #endif 215 free(ret->name); 216 ret->name = NULL; 217 break; 218 } 219 220 return 1; 221 } 222 223 static const ASN1_AUX X509_aux = { 224 .app_data = NULL, 225 .flags = ASN1_AFLG_REFCOUNT, 226 .ref_offset = offsetof(X509, references), 227 .ref_lock = CRYPTO_LOCK_X509, 228 .asn1_cb = x509_cb, 229 }; 230 static const ASN1_TEMPLATE X509_seq_tt[] = { 231 { 232 .offset = offsetof(X509, cert_info), 233 .field_name = "cert_info", 234 .item = &X509_CINF_it, 235 }, 236 { 237 .offset = offsetof(X509, sig_alg), 238 .field_name = "sig_alg", 239 .item = &X509_ALGOR_it, 240 }, 241 { 242 .offset = offsetof(X509, signature), 243 .field_name = "signature", 244 .item = &ASN1_BIT_STRING_it, 245 }, 246 }; 247 248 const ASN1_ITEM X509_it = { 249 .itype = ASN1_ITYPE_SEQUENCE, 250 .utype = V_ASN1_SEQUENCE, 251 .templates = X509_seq_tt, 252 .tcount = sizeof(X509_seq_tt) / sizeof(ASN1_TEMPLATE), 253 .funcs = &X509_aux, 254 .size = sizeof(X509), 255 .sname = "X509", 256 }; 257 258 259 X509 * 260 d2i_X509(X509 **a, const unsigned char **in, long len) 261 { 262 return (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 263 &X509_it); 264 } 265 266 int 267 i2d_X509(X509 *a, unsigned char **out) 268 { 269 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_it); 270 } 271 272 X509 * 273 X509_new(void) 274 { 275 return (X509 *)ASN1_item_new(&X509_it); 276 } 277 278 void 279 X509_free(X509 *a) 280 { 281 ASN1_item_free((ASN1_VALUE *)a, &X509_it); 282 } 283 284 X509 * 285 X509_dup(X509 *x) 286 { 287 return ASN1_item_dup(&X509_it, x); 288 } 289 290 int 291 X509_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 292 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 293 { 294 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509, argl, argp, 295 new_func, dup_func, free_func); 296 } 297 298 int 299 X509_set_ex_data(X509 *r, int idx, void *arg) 300 { 301 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg)); 302 } 303 304 void * 305 X509_get_ex_data(X509 *r, int idx) 306 { 307 return (CRYPTO_get_ex_data(&r->ex_data, idx)); 308 } 309 310 /* X509_AUX ASN1 routines. X509_AUX is the name given to 311 * a certificate with extra info tagged on the end. Since these 312 * functions set how a certificate is trusted they should only 313 * be used when the certificate comes from a reliable source 314 * such as local storage. 315 * 316 */ 317 318 X509 * 319 d2i_X509_AUX(X509 **a, const unsigned char **pp, long length) 320 { 321 const unsigned char *q; 322 X509 *ret; 323 324 /* Save start position */ 325 q = *pp; 326 ret = d2i_X509(NULL, pp, length); 327 /* If certificate unreadable then forget it */ 328 if (!ret) 329 return NULL; 330 /* update length */ 331 length -= *pp - q; 332 if (length > 0) { 333 if (!d2i_X509_CERT_AUX(&ret->aux, pp, length)) 334 goto err; 335 } 336 if (a != NULL) { 337 X509_free(*a); 338 *a = ret; 339 } 340 return ret; 341 342 err: 343 X509_free(ret); 344 return NULL; 345 } 346 347 int 348 i2d_X509_AUX(X509 *a, unsigned char **pp) 349 { 350 int length; 351 352 length = i2d_X509(a, pp); 353 if (a) 354 length += i2d_X509_CERT_AUX(a->aux, pp); 355 return length; 356 } 357 358 int 359 i2d_re_X509_tbs(X509 *x, unsigned char **pp) 360 { 361 x->cert_info->enc.modified = 1; 362 return i2d_X509_CINF(x->cert_info, pp); 363 } 364 365 void 366 X509_get0_signature(const ASN1_BIT_STRING **psig, const X509_ALGOR **palg, 367 const X509 *x) 368 { 369 if (psig != NULL) 370 *psig = x->signature; 371 if (palg != NULL) 372 *palg = x->sig_alg; 373 } 374 375 int 376 X509_get_signature_nid(const X509 *x) 377 { 378 return OBJ_obj2nid(x->sig_alg->algorithm); 379 } 380