1 /* 2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 #include "apps.h" 14 #include "progs.h" 15 #include <openssl/bio.h> 16 #include <openssl/err.h> 17 #include <openssl/x509.h> 18 #include <openssl/x509v3.h> 19 #include <openssl/pem.h> 20 21 static int cb(int ok, X509_STORE_CTX *ctx); 22 static int check(X509_STORE *ctx, const char *file, 23 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, 24 STACK_OF(X509_CRL) *crls, int show_chain, 25 STACK_OF(OPENSSL_STRING) *opts); 26 static int v_verbose = 0, vflags = 0; 27 28 typedef enum OPTION_choice { 29 OPT_COMMON, 30 OPT_ENGINE, 31 OPT_CAPATH, 32 OPT_CAFILE, 33 OPT_CASTORE, 34 OPT_NOCAPATH, 35 OPT_NOCAFILE, 36 OPT_NOCASTORE, 37 OPT_UNTRUSTED, 38 OPT_TRUSTED, 39 OPT_CRLFILE, 40 OPT_CRL_DOWNLOAD, 41 OPT_SHOW_CHAIN, 42 OPT_V_ENUM, 43 OPT_NAMEOPT, 44 OPT_VFYOPT, 45 OPT_VERBOSE, 46 OPT_PROV_ENUM 47 } OPTION_CHOICE; 48 49 const OPTIONS verify_options[] = { 50 { OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert...]\n" }, 51 52 OPT_SECTION("General"), 53 { "help", OPT_HELP, '-', "Display this summary" }, 54 #ifndef OPENSSL_NO_ENGINE 55 { "engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device" }, 56 #endif 57 { "verbose", OPT_VERBOSE, '-', 58 "Print extra information about the operations being performed." }, 59 { "nameopt", OPT_NAMEOPT, 's', "Certificate subject/issuer name printing options" }, 60 61 OPT_SECTION("Certificate chain"), 62 { "trusted", OPT_TRUSTED, '<', "A file of trusted certificates" }, 63 { "CAfile", OPT_CAFILE, '<', "A file of trusted certificates" }, 64 { "CApath", OPT_CAPATH, '/', "A directory of files with trusted certificates" }, 65 { "CAstore", OPT_CASTORE, ':', "URI to a store of trusted certificates" }, 66 { "no-CAfile", OPT_NOCAFILE, '-', 67 "Do not load the default trusted certificates file" }, 68 { "no-CApath", OPT_NOCAPATH, '-', 69 "Do not load trusted certificates from the default directory" }, 70 { "no-CAstore", OPT_NOCASTORE, '-', 71 "Do not load trusted certificates from the default certificates store" }, 72 { "untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates" }, 73 { "CRLfile", OPT_CRLFILE, '<', 74 "File containing one or more CRL's (in PEM format) to load" }, 75 { "crl_download", OPT_CRL_DOWNLOAD, '-', 76 "Try downloading CRL information for certificates via their CDP entries" }, 77 { "show_chain", OPT_SHOW_CHAIN, '-', 78 "Display information about the certificate chain" }, 79 80 OPT_V_OPTIONS, 81 { "vfyopt", OPT_VFYOPT, 's', "Verification parameter in n:v form" }, 82 83 OPT_PROV_OPTIONS, 84 85 OPT_PARAMETERS(), 86 { "cert", 0, 0, "Certificate(s) to verify (optional; stdin used otherwise)" }, 87 { NULL } 88 }; 89 90 int verify_main(int argc, char **argv) 91 { 92 ENGINE *e = NULL; 93 STACK_OF(X509) *untrusted = NULL, *trusted = NULL; 94 STACK_OF(X509_CRL) *crls = NULL; 95 STACK_OF(OPENSSL_STRING) *vfyopts = NULL; 96 X509_STORE *store = NULL; 97 X509_VERIFY_PARAM *vpm = NULL; 98 const char *prog, *CApath = NULL, *CAfile = NULL, *CAstore = NULL; 99 int noCApath = 0, noCAfile = 0, noCAstore = 0; 100 int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1; 101 OPTION_CHOICE o; 102 103 if ((vpm = X509_VERIFY_PARAM_new()) == NULL) 104 goto end; 105 106 prog = opt_init(argc, argv, verify_options); 107 while ((o = opt_next()) != OPT_EOF) { 108 switch (o) { 109 case OPT_EOF: 110 case OPT_ERR: 111 opthelp: 112 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 113 goto end; 114 case OPT_HELP: 115 opt_help(verify_options); 116 BIO_printf(bio_err, "\nRecognized certificate chain purposes:\n"); 117 for (i = 0; i < X509_PURPOSE_get_count(); i++) { 118 X509_PURPOSE *ptmp = X509_PURPOSE_get0(i); 119 120 BIO_printf(bio_err, " %-15s %s\n", 121 X509_PURPOSE_get0_sname(ptmp), 122 X509_PURPOSE_get0_name(ptmp)); 123 } 124 125 BIO_printf(bio_err, "Recognized certificate policy names:\n"); 126 for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) { 127 const X509_VERIFY_PARAM *vptmp = X509_VERIFY_PARAM_get0(i); 128 129 BIO_printf(bio_err, " %s\n", 130 X509_VERIFY_PARAM_get0_name(vptmp)); 131 } 132 ret = 0; 133 goto end; 134 case OPT_V_CASES: 135 if (!opt_verify(o, vpm)) 136 goto end; 137 vpmtouched++; 138 break; 139 case OPT_CAPATH: 140 CApath = opt_arg(); 141 break; 142 case OPT_CAFILE: 143 CAfile = opt_arg(); 144 break; 145 case OPT_CASTORE: 146 CAstore = opt_arg(); 147 break; 148 case OPT_NOCAPATH: 149 noCApath = 1; 150 break; 151 case OPT_NOCAFILE: 152 noCAfile = 1; 153 break; 154 case OPT_NOCASTORE: 155 noCAstore = 1; 156 break; 157 case OPT_UNTRUSTED: 158 /* Zero or more times */ 159 if (!load_certs(opt_arg(), 0, &untrusted, NULL, 160 "untrusted certificates")) 161 goto end; 162 break; 163 case OPT_TRUSTED: 164 /* Zero or more times */ 165 noCAfile = 1; 166 noCApath = 1; 167 noCAstore = 1; 168 if (!load_certs(opt_arg(), 0, &trusted, NULL, "trusted certificates")) 169 goto end; 170 break; 171 case OPT_CRLFILE: 172 /* Zero or more times */ 173 if (!load_crls(opt_arg(), &crls, NULL, "other CRLs")) 174 goto end; 175 break; 176 case OPT_CRL_DOWNLOAD: 177 crl_download = 1; 178 break; 179 case OPT_ENGINE: 180 if ((e = setup_engine(opt_arg(), 0)) == NULL) { 181 /* Failure message already displayed */ 182 goto end; 183 } 184 break; 185 case OPT_SHOW_CHAIN: 186 show_chain = 1; 187 break; 188 case OPT_NAMEOPT: 189 if (!set_nameopt(opt_arg())) 190 goto end; 191 break; 192 case OPT_VFYOPT: 193 if (!vfyopts) 194 vfyopts = sk_OPENSSL_STRING_new_null(); 195 if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg())) 196 goto opthelp; 197 break; 198 case OPT_VERBOSE: 199 v_verbose = 1; 200 break; 201 case OPT_PROV_CASES: 202 if (!opt_provider(o)) 203 goto end; 204 break; 205 } 206 } 207 208 /* Extra arguments are certificates to verify. */ 209 argc = opt_num_rest(); 210 argv = opt_rest(); 211 212 if (trusted != NULL 213 && (CAfile != NULL || CApath != NULL || CAstore != NULL)) { 214 BIO_printf(bio_err, 215 "%s: Cannot use -trusted with -CAfile, -CApath or -CAstore\n", 216 prog); 217 goto end; 218 } 219 220 if ((store = setup_verify(CAfile, noCAfile, CApath, noCApath, 221 CAstore, noCAstore)) 222 == NULL) 223 goto end; 224 X509_STORE_set_verify_cb(store, cb); 225 226 if (vpmtouched) 227 X509_STORE_set1_param(store, vpm); 228 229 ERR_clear_error(); 230 231 if (crl_download) 232 store_setup_crl_download(store); 233 234 ret = 0; 235 if (argc < 1) { 236 if (check(store, NULL, untrusted, trusted, crls, show_chain, 237 vfyopts) 238 != 1) 239 ret = -1; 240 } else { 241 for (i = 0; i < argc; i++) 242 if (check(store, argv[i], untrusted, trusted, crls, show_chain, 243 vfyopts) 244 != 1) 245 ret = -1; 246 } 247 248 end: 249 X509_VERIFY_PARAM_free(vpm); 250 X509_STORE_free(store); 251 OSSL_STACK_OF_X509_free(untrusted); 252 OSSL_STACK_OF_X509_free(trusted); 253 sk_X509_CRL_pop_free(crls, X509_CRL_free); 254 sk_OPENSSL_STRING_free(vfyopts); 255 release_engine(e); 256 return (ret < 0 ? 2 : ret); 257 } 258 259 static int check(X509_STORE *ctx, const char *file, 260 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, 261 STACK_OF(X509_CRL) *crls, int show_chain, 262 STACK_OF(OPENSSL_STRING) *opts) 263 { 264 X509 *x = NULL; 265 int i = 0, ret = 0; 266 X509_STORE_CTX *csc; 267 STACK_OF(X509) *chain = NULL; 268 int num_untrusted; 269 270 x = load_cert(file, FORMAT_UNDEF, "certificate file"); 271 if (x == NULL) 272 goto end; 273 274 if (opts != NULL) { 275 for (i = 0; i < sk_OPENSSL_STRING_num(opts); i++) { 276 char *opt = sk_OPENSSL_STRING_value(opts, i); 277 if (x509_ctrl_string(x, opt) <= 0) { 278 BIO_printf(bio_err, "parameter error \"%s\"\n", opt); 279 ERR_print_errors(bio_err); 280 X509_free(x); 281 return 0; 282 } 283 } 284 } 285 286 csc = X509_STORE_CTX_new(); 287 if (csc == NULL) { 288 BIO_printf(bio_err, "error %s: X.509 store context allocation failed\n", 289 (file == NULL) ? "stdin" : file); 290 goto end; 291 } 292 293 X509_STORE_set_flags(ctx, vflags); 294 if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) { 295 X509_STORE_CTX_free(csc); 296 BIO_printf(bio_err, 297 "error %s: X.509 store context initialization failed\n", 298 (file == NULL) ? "stdin" : file); 299 goto end; 300 } 301 if (tchain != NULL) 302 X509_STORE_CTX_set0_trusted_stack(csc, tchain); 303 if (crls != NULL) 304 X509_STORE_CTX_set0_crls(csc, crls); 305 i = X509_verify_cert(csc); 306 if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) { 307 BIO_printf(bio_out, "%s: OK\n", (file == NULL) ? "stdin" : file); 308 ret = 1; 309 if (show_chain) { 310 int j; 311 312 chain = X509_STORE_CTX_get1_chain(csc); 313 num_untrusted = X509_STORE_CTX_get_num_untrusted(csc); 314 BIO_printf(bio_out, "Chain:\n"); 315 for (j = 0; j < sk_X509_num(chain); j++) { 316 X509 *cert = sk_X509_value(chain, j); 317 BIO_printf(bio_out, "depth=%d: ", j); 318 X509_NAME_print_ex_fp(stdout, 319 X509_get_subject_name(cert), 320 0, get_nameopt()); 321 if (j < num_untrusted) 322 BIO_printf(bio_out, " (untrusted)"); 323 BIO_printf(bio_out, "\n"); 324 } 325 OSSL_STACK_OF_X509_free(chain); 326 } 327 } else { 328 BIO_printf(bio_err, 329 "error %s: verification failed\n", 330 (file == NULL) ? "stdin" : file); 331 } 332 X509_STORE_CTX_free(csc); 333 334 end: 335 if (i <= 0) 336 ERR_print_errors(bio_err); 337 X509_free(x); 338 339 return ret; 340 } 341 342 static int cb(int ok, X509_STORE_CTX *ctx) 343 { 344 int cert_error = X509_STORE_CTX_get_error(ctx); 345 X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx); 346 347 if (!ok) { 348 if (current_cert != NULL) { 349 X509_NAME_print_ex(bio_err, 350 X509_get_subject_name(current_cert), 351 0, get_nameopt()); 352 BIO_printf(bio_err, "\n"); 353 } 354 BIO_printf(bio_err, "%serror %d at %d depth lookup: %s\n", 355 X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path] " : "", 356 cert_error, 357 X509_STORE_CTX_get_error_depth(ctx), 358 X509_verify_cert_error_string(cert_error)); 359 360 /* 361 * Pretend that some errors are ok, so they don't stop further 362 * processing of the certificate chain. Setting ok = 1 does this. 363 * After X509_verify_cert() is done, we verify that there were 364 * no actual errors, even if the returned value was positive. 365 */ 366 switch (cert_error) { 367 case X509_V_ERR_NO_EXPLICIT_POLICY: 368 policies_print(ctx); 369 /* fall through */ 370 case X509_V_ERR_CERT_HAS_EXPIRED: 371 /* Continue even if the leaf is a self-signed cert */ 372 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 373 /* Continue after extension errors too */ 374 case X509_V_ERR_INVALID_CA: 375 case X509_V_ERR_INVALID_NON_CA: 376 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 377 case X509_V_ERR_CRL_HAS_EXPIRED: 378 case X509_V_ERR_CRL_NOT_YET_VALID: 379 case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION: 380 /* errors due to strict conformance checking (-x509_strict) */ 381 case X509_V_ERR_INVALID_PURPOSE: 382 case X509_V_ERR_PATHLEN_INVALID_FOR_NON_CA: 383 case X509_V_ERR_PATHLEN_WITHOUT_KU_KEY_CERT_SIGN: 384 case X509_V_ERR_CA_BCONS_NOT_CRITICAL: 385 case X509_V_ERR_CA_CERT_MISSING_KEY_USAGE: 386 case X509_V_ERR_KU_KEY_CERT_SIGN_INVALID_FOR_NON_CA: 387 case X509_V_ERR_ISSUER_NAME_EMPTY: 388 case X509_V_ERR_SUBJECT_NAME_EMPTY: 389 case X509_V_ERR_EMPTY_SUBJECT_SAN_NOT_CRITICAL: 390 case X509_V_ERR_EMPTY_SUBJECT_ALT_NAME: 391 case X509_V_ERR_SIGNATURE_ALGORITHM_INCONSISTENCY: 392 case X509_V_ERR_AUTHORITY_KEY_IDENTIFIER_CRITICAL: 393 case X509_V_ERR_SUBJECT_KEY_IDENTIFIER_CRITICAL: 394 case X509_V_ERR_MISSING_AUTHORITY_KEY_IDENTIFIER: 395 case X509_V_ERR_MISSING_SUBJECT_KEY_IDENTIFIER: 396 case X509_V_ERR_EXTENSIONS_REQUIRE_VERSION_3: 397 ok = 1; 398 } 399 return ok; 400 } 401 if (cert_error == X509_V_OK && ok == 2) 402 policies_print(ctx); 403 if (!v_verbose) 404 ERR_clear_error(); 405 return ok; 406 } 407
Indexes created Sat Feb 28 05:31:39 UTC 2026