1 /* $OpenBSD: verify.c,v 1.5 2015/10/10 22:28:51 doug 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 #include <stdlib.h> 61 #include <string.h> 62 63 #include "apps.h" 64 65 #include <openssl/bio.h> 66 #include <openssl/err.h> 67 #include <openssl/pem.h> 68 #include <openssl/x509.h> 69 #include <openssl/x509v3.h> 70 71 static int cb(int ok, X509_STORE_CTX * ctx); 72 static int check(X509_STORE * ctx, char *file, STACK_OF(X509) * uchain, 73 STACK_OF(X509) * tchain, STACK_OF(X509_CRL) * crls); 74 static int v_verbose = 0, vflags = 0; 75 76 int 77 verify_main(int argc, char **argv) 78 { 79 int i, ret = 1, badarg = 0; 80 char *CApath = NULL, *CAfile = NULL; 81 char *untfile = NULL, *trustfile = NULL, *crlfile = NULL; 82 STACK_OF(X509) * untrusted = NULL, *trusted = NULL; 83 STACK_OF(X509_CRL) * crls = NULL; 84 X509_STORE *cert_ctx = NULL; 85 X509_LOOKUP *lookup = NULL; 86 X509_VERIFY_PARAM *vpm = NULL; 87 88 if (single_execution) { 89 if (pledge("stdio rpath", NULL) == -1) { 90 perror("pledge"); 91 exit(1); 92 } 93 } 94 95 cert_ctx = X509_STORE_new(); 96 if (cert_ctx == NULL) 97 goto end; 98 X509_STORE_set_verify_cb(cert_ctx, cb); 99 100 argc--; 101 argv++; 102 for (;;) { 103 if (argc >= 1) { 104 if (strcmp(*argv, "-CApath") == 0) { 105 if (argc-- < 1) 106 goto end; 107 CApath = *(++argv); 108 } else if (strcmp(*argv, "-CAfile") == 0) { 109 if (argc-- < 1) 110 goto end; 111 CAfile = *(++argv); 112 } else if (args_verify(&argv, &argc, &badarg, bio_err, 113 &vpm)) { 114 if (badarg) 115 goto end; 116 continue; 117 } else if (strcmp(*argv, "-untrusted") == 0) { 118 if (argc-- < 1) 119 goto end; 120 untfile = *(++argv); 121 } else if (strcmp(*argv, "-trusted") == 0) { 122 if (argc-- < 1) 123 goto end; 124 trustfile = *(++argv); 125 } else if (strcmp(*argv, "-CRLfile") == 0) { 126 if (argc-- < 1) 127 goto end; 128 crlfile = *(++argv); 129 } 130 else if (strcmp(*argv, "-help") == 0) 131 goto end; 132 else if (strcmp(*argv, "-verbose") == 0) 133 v_verbose = 1; 134 else if (argv[0][0] == '-') 135 goto end; 136 else 137 break; 138 argc--; 139 argv++; 140 } else 141 break; 142 } 143 144 if (vpm) 145 X509_STORE_set1_param(cert_ctx, vpm); 146 147 lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file()); 148 if (lookup == NULL) 149 abort(); 150 if (CAfile) { 151 i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM); 152 if (!i) { 153 BIO_printf(bio_err, "Error loading file %s\n", CAfile); 154 ERR_print_errors(bio_err); 155 goto end; 156 } 157 } else 158 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT); 159 160 lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir()); 161 if (lookup == NULL) 162 abort(); 163 if (CApath) { 164 i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM); 165 if (!i) { 166 BIO_printf(bio_err, "Error loading directory %s\n", CApath); 167 ERR_print_errors(bio_err); 168 goto end; 169 } 170 } else 171 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT); 172 173 ERR_clear_error(); 174 175 if (untfile) { 176 untrusted = load_certs(bio_err, untfile, FORMAT_PEM, 177 NULL, "untrusted certificates"); 178 if (!untrusted) 179 goto end; 180 } 181 if (trustfile) { 182 trusted = load_certs(bio_err, trustfile, FORMAT_PEM, 183 NULL, "trusted certificates"); 184 if (!trusted) 185 goto end; 186 } 187 if (crlfile) { 188 crls = load_crls(bio_err, crlfile, FORMAT_PEM, 189 NULL, "other CRLs"); 190 if (!crls) 191 goto end; 192 } 193 ret = 0; 194 if (argc < 1) { 195 if (1 != check(cert_ctx, NULL, untrusted, trusted, crls)) 196 ret = -1; 197 } else { 198 for (i = 0; i < argc; i++) 199 if (1 != check(cert_ctx, argv[i], untrusted, trusted, 200 crls)) 201 ret = -1; 202 } 203 204 end: 205 if (ret == 1) { 206 BIO_printf(bio_err, "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]"); 207 BIO_printf(bio_err, " [-attime timestamp]"); 208 BIO_printf(bio_err, " cert1 cert2 ...\n"); 209 210 BIO_printf(bio_err, "recognized usages:\n"); 211 for (i = 0; i < X509_PURPOSE_get_count(); i++) { 212 X509_PURPOSE *ptmp; 213 ptmp = X509_PURPOSE_get0(i); 214 BIO_printf(bio_err, "\t%-10s\t%s\n", 215 X509_PURPOSE_get0_sname(ptmp), 216 X509_PURPOSE_get0_name(ptmp)); 217 } 218 } 219 if (vpm) 220 X509_VERIFY_PARAM_free(vpm); 221 if (cert_ctx != NULL) 222 X509_STORE_free(cert_ctx); 223 sk_X509_pop_free(untrusted, X509_free); 224 sk_X509_pop_free(trusted, X509_free); 225 sk_X509_CRL_pop_free(crls, X509_CRL_free); 226 227 return (ret < 0 ? 2 : ret); 228 } 229 230 static int 231 check(X509_STORE * ctx, char *file, STACK_OF(X509) * uchain, 232 STACK_OF(X509) * tchain, STACK_OF(X509_CRL) * crls) 233 { 234 X509 *x = NULL; 235 int i = 0, ret = 0; 236 X509_STORE_CTX *csc; 237 238 x = load_cert(bio_err, file, FORMAT_PEM, NULL, "certificate file"); 239 if (x == NULL) 240 goto end; 241 fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file); 242 243 csc = X509_STORE_CTX_new(); 244 if (csc == NULL) { 245 ERR_print_errors(bio_err); 246 goto end; 247 } 248 X509_STORE_set_flags(ctx, vflags); 249 if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) { 250 ERR_print_errors(bio_err); 251 goto end; 252 } 253 if (tchain) 254 X509_STORE_CTX_trusted_stack(csc, tchain); 255 if (crls) 256 X509_STORE_CTX_set0_crls(csc, crls); 257 i = X509_verify_cert(csc); 258 X509_STORE_CTX_free(csc); 259 260 ret = 0; 261 262 end: 263 if (i > 0) { 264 fprintf(stdout, "OK\n"); 265 ret = 1; 266 } else 267 ERR_print_errors(bio_err); 268 if (x != NULL) 269 X509_free(x); 270 271 return (ret); 272 } 273 274 static int 275 cb(int ok, X509_STORE_CTX * ctx) 276 { 277 int cert_error = X509_STORE_CTX_get_error(ctx); 278 X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx); 279 280 if (!ok) { 281 if (current_cert) { 282 X509_NAME_print_ex_fp(stdout, 283 X509_get_subject_name(current_cert), 284 0, XN_FLAG_ONELINE); 285 printf("\n"); 286 } 287 printf("%serror %d at %d depth lookup:%s\n", 288 X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "", 289 cert_error, 290 X509_STORE_CTX_get_error_depth(ctx), 291 X509_verify_cert_error_string(cert_error)); 292 switch (cert_error) { 293 case X509_V_ERR_NO_EXPLICIT_POLICY: 294 policies_print(NULL, ctx); 295 case X509_V_ERR_CERT_HAS_EXPIRED: 296 297 /* 298 * since we are just checking the certificates, it is 299 * ok if they are self signed. But we should still 300 * warn the user. 301 */ 302 303 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 304 /* Continue after extension errors too */ 305 case X509_V_ERR_INVALID_CA: 306 case X509_V_ERR_INVALID_NON_CA: 307 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 308 case X509_V_ERR_INVALID_PURPOSE: 309 case X509_V_ERR_CRL_HAS_EXPIRED: 310 case X509_V_ERR_CRL_NOT_YET_VALID: 311 case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION: 312 ok = 1; 313 314 } 315 316 return ok; 317 318 } 319 if (cert_error == X509_V_OK && ok == 2) 320 policies_print(NULL, ctx); 321 if (!v_verbose) 322 ERR_clear_error(); 323 return (ok); 324 } 325