1 /* 2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 <openssl/bio.h> 15 #include <openssl/err.h> 16 #include <openssl/x509.h> 17 #include <openssl/x509v3.h> 18 #include <openssl/pem.h> 19 20 static int cb(int ok, X509_STORE_CTX *ctx); 21 static int check(X509_STORE *ctx, const char *file, 22 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, 23 STACK_OF(X509_CRL) *crls, int show_chain); 24 static int v_verbose = 0, vflags = 0; 25 26 typedef enum OPTION_choice { 27 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, 28 OPT_ENGINE, OPT_CAPATH, OPT_CAFILE, OPT_NOCAPATH, OPT_NOCAFILE, 29 OPT_UNTRUSTED, OPT_TRUSTED, OPT_CRLFILE, OPT_CRL_DOWNLOAD, OPT_SHOW_CHAIN, 30 OPT_V_ENUM, 31 OPT_VERBOSE 32 } OPTION_CHOICE; 33 34 OPTIONS verify_options[] = { 35 {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"}, 36 {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, 37 {"help", OPT_HELP, '-', "Display this summary"}, 38 {"verbose", OPT_VERBOSE, '-', 39 "Print extra information about the operations being performed."}, 40 {"CApath", OPT_CAPATH, '/', "A directory of trusted certificates"}, 41 {"CAfile", OPT_CAFILE, '<', "A file of trusted certificates"}, 42 {"no-CAfile", OPT_NOCAFILE, '-', 43 "Do not load the default certificates file"}, 44 {"no-CApath", OPT_NOCAPATH, '-', 45 "Do not load certificates from the default certificates directory"}, 46 {"untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates"}, 47 {"trusted", OPT_TRUSTED, '<', "A file of trusted certificates"}, 48 {"CRLfile", OPT_CRLFILE, '<', 49 "File containing one or more CRL's (in PEM format) to load"}, 50 {"crl_download", OPT_CRL_DOWNLOAD, '-', 51 "Attempt to download CRL information for this certificate"}, 52 {"show_chain", OPT_SHOW_CHAIN, '-', 53 "Display information about the certificate chain"}, 54 OPT_V_OPTIONS, 55 #ifndef OPENSSL_NO_ENGINE 56 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, 57 #endif 58 {NULL} 59 }; 60 61 int verify_main(int argc, char **argv) 62 { 63 ENGINE *e = NULL; 64 STACK_OF(X509) *untrusted = NULL, *trusted = NULL; 65 STACK_OF(X509_CRL) *crls = NULL; 66 X509_STORE *store = NULL; 67 X509_VERIFY_PARAM *vpm = NULL; 68 const char *prog, *CApath = NULL, *CAfile = NULL; 69 int noCApath = 0, noCAfile = 0; 70 int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1; 71 OPTION_CHOICE o; 72 73 if ((vpm = X509_VERIFY_PARAM_new()) == NULL) 74 goto end; 75 76 prog = opt_init(argc, argv, verify_options); 77 while ((o = opt_next()) != OPT_EOF) { 78 switch (o) { 79 case OPT_EOF: 80 case OPT_ERR: 81 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 82 goto end; 83 case OPT_HELP: 84 opt_help(verify_options); 85 BIO_printf(bio_err, "Recognized usages:\n"); 86 for (i = 0; i < X509_PURPOSE_get_count(); i++) { 87 X509_PURPOSE *ptmp; 88 ptmp = X509_PURPOSE_get0(i); 89 BIO_printf(bio_err, "\t%-10s\t%s\n", 90 X509_PURPOSE_get0_sname(ptmp), 91 X509_PURPOSE_get0_name(ptmp)); 92 } 93 94 BIO_printf(bio_err, "Recognized verify names:\n"); 95 for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) { 96 const X509_VERIFY_PARAM *vptmp; 97 vptmp = X509_VERIFY_PARAM_get0(i); 98 BIO_printf(bio_err, "\t%-10s\n", 99 X509_VERIFY_PARAM_get0_name(vptmp)); 100 } 101 ret = 0; 102 goto end; 103 case OPT_V_CASES: 104 if (!opt_verify(o, vpm)) 105 goto end; 106 vpmtouched++; 107 break; 108 case OPT_CAPATH: 109 CApath = opt_arg(); 110 break; 111 case OPT_CAFILE: 112 CAfile = opt_arg(); 113 break; 114 case OPT_NOCAPATH: 115 noCApath = 1; 116 break; 117 case OPT_NOCAFILE: 118 noCAfile = 1; 119 break; 120 case OPT_UNTRUSTED: 121 /* Zero or more times */ 122 if (!load_certs(opt_arg(), &untrusted, FORMAT_PEM, NULL, 123 "untrusted certificates")) 124 goto end; 125 break; 126 case OPT_TRUSTED: 127 /* Zero or more times */ 128 noCAfile = 1; 129 noCApath = 1; 130 if (!load_certs(opt_arg(), &trusted, FORMAT_PEM, NULL, 131 "trusted certificates")) 132 goto end; 133 break; 134 case OPT_CRLFILE: 135 /* Zero or more times */ 136 if (!load_crls(opt_arg(), &crls, FORMAT_PEM, NULL, 137 "other CRLs")) 138 goto end; 139 break; 140 case OPT_CRL_DOWNLOAD: 141 crl_download = 1; 142 break; 143 case OPT_ENGINE: 144 if ((e = setup_engine(opt_arg(), 0)) == NULL) { 145 /* Failure message already displayed */ 146 goto end; 147 } 148 break; 149 case OPT_SHOW_CHAIN: 150 show_chain = 1; 151 break; 152 case OPT_VERBOSE: 153 v_verbose = 1; 154 break; 155 } 156 } 157 argc = opt_num_rest(); 158 argv = opt_rest(); 159 if (trusted != NULL && (CAfile || CApath)) { 160 BIO_printf(bio_err, 161 "%s: Cannot use -trusted with -CAfile or -CApath\n", 162 prog); 163 goto end; 164 } 165 166 if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL) 167 goto end; 168 X509_STORE_set_verify_cb(store, cb); 169 170 if (vpmtouched) 171 X509_STORE_set1_param(store, vpm); 172 173 ERR_clear_error(); 174 175 if (crl_download) 176 store_setup_crl_download(store); 177 178 ret = 0; 179 if (argc < 1) { 180 if (check(store, NULL, untrusted, trusted, crls, show_chain) != 1) 181 ret = -1; 182 } else { 183 for (i = 0; i < argc; i++) 184 if (check(store, argv[i], untrusted, trusted, crls, 185 show_chain) != 1) 186 ret = -1; 187 } 188 189 end: 190 X509_VERIFY_PARAM_free(vpm); 191 X509_STORE_free(store); 192 sk_X509_pop_free(untrusted, X509_free); 193 sk_X509_pop_free(trusted, X509_free); 194 sk_X509_CRL_pop_free(crls, X509_CRL_free); 195 release_engine(e); 196 return (ret < 0 ? 2 : ret); 197 } 198 199 static int check(X509_STORE *ctx, const char *file, 200 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, 201 STACK_OF(X509_CRL) *crls, int show_chain) 202 { 203 X509 *x = NULL; 204 int i = 0, ret = 0; 205 X509_STORE_CTX *csc; 206 STACK_OF(X509) *chain = NULL; 207 int num_untrusted; 208 209 x = load_cert(file, FORMAT_PEM, "certificate file"); 210 if (x == NULL) 211 goto end; 212 213 csc = X509_STORE_CTX_new(); 214 if (csc == NULL) { 215 printf("error %s: X.509 store context allocation failed\n", 216 (file == NULL) ? "stdin" : file); 217 goto end; 218 } 219 220 X509_STORE_set_flags(ctx, vflags); 221 if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) { 222 printf("error %s: X.509 store context initialization failed\n", 223 (file == NULL) ? "stdin" : file); 224 goto end; 225 } 226 if (tchain) 227 X509_STORE_CTX_set0_trusted_stack(csc, tchain); 228 if (crls) 229 X509_STORE_CTX_set0_crls(csc, crls); 230 i = X509_verify_cert(csc); 231 if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) { 232 printf("%s: OK\n", (file == NULL) ? "stdin" : file); 233 ret = 1; 234 if (show_chain) { 235 int j; 236 237 chain = X509_STORE_CTX_get1_chain(csc); 238 num_untrusted = X509_STORE_CTX_get_num_untrusted(csc); 239 printf("Chain:\n"); 240 for (j = 0; j < sk_X509_num(chain); j++) { 241 X509 *cert = sk_X509_value(chain, j); 242 printf("depth=%d: ", j); 243 X509_NAME_print_ex_fp(stdout, 244 X509_get_subject_name(cert), 245 0, XN_FLAG_ONELINE); 246 if (j < num_untrusted) 247 printf(" (untrusted)"); 248 printf("\n"); 249 } 250 sk_X509_pop_free(chain, X509_free); 251 } 252 } else { 253 printf("error %s: verification failed\n", (file == NULL) ? "stdin" : file); 254 } 255 X509_STORE_CTX_free(csc); 256 257 end: 258 if (i <= 0) 259 ERR_print_errors(bio_err); 260 X509_free(x); 261 262 return ret; 263 } 264 265 static int cb(int ok, X509_STORE_CTX *ctx) 266 { 267 int cert_error = X509_STORE_CTX_get_error(ctx); 268 X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx); 269 270 if (!ok) { 271 if (current_cert) { 272 X509_NAME_print_ex(bio_err, 273 X509_get_subject_name(current_cert), 274 0, XN_FLAG_ONELINE); 275 BIO_printf(bio_err, "\n"); 276 } 277 BIO_printf(bio_err, "%serror %d at %d depth lookup: %s\n", 278 X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path] " : "", 279 cert_error, 280 X509_STORE_CTX_get_error_depth(ctx), 281 X509_verify_cert_error_string(cert_error)); 282 switch (cert_error) { 283 case X509_V_ERR_NO_EXPLICIT_POLICY: 284 policies_print(ctx); 285 /* fall thru */ 286 case X509_V_ERR_CERT_HAS_EXPIRED: 287 288 /* 289 * since we are just checking the certificates, it is ok if they 290 * are self signed. But we should still warn the user. 291 */ 292 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 293 /* Continue after extension errors too */ 294 case X509_V_ERR_INVALID_CA: 295 case X509_V_ERR_INVALID_NON_CA: 296 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 297 case X509_V_ERR_INVALID_PURPOSE: 298 case X509_V_ERR_CRL_HAS_EXPIRED: 299 case X509_V_ERR_CRL_NOT_YET_VALID: 300 case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION: 301 ok = 1; 302 } 303 304 return ok; 305 306 } 307 if (cert_error == X509_V_OK && ok == 2) 308 policies_print(ctx); 309 if (!v_verbose) 310 ERR_clear_error(); 311 return (ok); 312 } 313