crypto/openssl/apps/verify.c

   1 /* apps/verify.c */
   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 #include "apps.h"
  63 #include <openssl/bio.h>
  64 #include <openssl/err.h>
  65 #include <openssl/x509.h>
  66 #include <openssl/x509v3.h>
  67 #include <openssl/pem.h>
  68
  69 #undef PROG
  70 #define PROG    verify_main
  71
  72 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
  73 static int check(X509_STORE *ctx, char *file,
  74                  STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
  75                  STACK_OF(X509_CRL) *crls, ENGINE *e);
  76 static int v_verbose = 0, vflags = 0;
  77
  78 int MAIN(int, char **);
  79
  80 int MAIN(int argc, char **argv)
  81 {
  82     ENGINE *e = NULL;
  83     int i, ret = 1, badarg = 0;
  84     char *CApath = NULL, *CAfile = NULL;
  85     char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
  86     STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
  87     STACK_OF(X509_CRL) *crls = NULL;
  88     X509_STORE *cert_ctx = NULL;
  89     X509_LOOKUP *lookup = NULL;
  90     X509_VERIFY_PARAM *vpm = NULL;
  91 #ifndef OPENSSL_NO_ENGINE
  92     char *engine = NULL;
  93 #endif
  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     ERR_load_crypto_strings();
 101
 102     apps_startup();
 103
 104     if (bio_err == NULL)
 105         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 106             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
 107
 108     if (!load_config(bio_err, NULL))
 109         goto end;
 110
 111     argc--;
 112     argv++;
 113     for (;;) {
 114         if (argc >= 1) {
 115             if (strcmp(*argv, "-CApath") == 0) {
 116                 if (argc-- < 1)
 117                     goto end;
 118                 CApath = *(++argv);
 119             } else if (strcmp(*argv, "-CAfile") == 0) {
 120                 if (argc-- < 1)
 121                     goto end;
 122                 CAfile = *(++argv);
 123             } else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm)) {
 124                 if (badarg)
 125                     goto end;
 126                 continue;
 127             } else if (strcmp(*argv, "-untrusted") == 0) {
 128                 if (argc-- < 1)
 129                     goto end;
 130                 untfile = *(++argv);
 131             } else if (strcmp(*argv, "-trusted") == 0) {
 132                 if (argc-- < 1)
 133                     goto end;
 134                 trustfile = *(++argv);
 135             } else if (strcmp(*argv, "-CRLfile") == 0) {
 136                 if (argc-- < 1)
 137                     goto end;
 138                 crlfile = *(++argv);
 139             }
 140 #ifndef OPENSSL_NO_ENGINE
 141             else if (strcmp(*argv, "-engine") == 0) {
 142                 if (--argc < 1)
 143                     goto end;
 144                 engine = *(++argv);
 145             }
 146 #endif
 147             else if (strcmp(*argv, "-help") == 0)
 148                 goto end;
 149             else if (strcmp(*argv, "-verbose") == 0)
 150                 v_verbose = 1;
 151             else if (argv[0][0] == '-')
 152                 goto end;
 153             else
 154                 break;
 155             argc--;
 156             argv++;
 157         } else
 158             break;
 159     }
 160
 161 #ifndef OPENSSL_NO_ENGINE
 162     e = setup_engine(bio_err, engine, 0);
 163 #endif
 164
 165     if (vpm)
 166         X509_STORE_set1_param(cert_ctx, vpm);
 167
 168     lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 169     if (lookup == NULL)
 170         abort();
 171     if (CAfile) {
 172         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
 173         if (!i) {
 174             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 175             ERR_print_errors(bio_err);
 176             goto end;
 177         }
 178     } else
 179         X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
 180
 181     lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 182     if (lookup == NULL)
 183         abort();
 184     if (CApath) {
 185         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
 186         if (!i) {
 187             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 188             ERR_print_errors(bio_err);
 189             goto end;
 190         }
 191     } else
 192         X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
 193
 194     ERR_clear_error();
 195
 196     if (untfile) {
 197         untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
 198                                NULL, e, "untrusted certificates");
 199         if (!untrusted)
 200             goto end;
 201     }
 202
 203     if (trustfile) {
 204         trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
 205                              NULL, e, "trusted certificates");
 206         if (!trusted)
 207             goto end;
 208     }
 209
 210     if (crlfile) {
 211         crls = load_crls(bio_err, crlfile, FORMAT_PEM, NULL, e, "other CRLs");
 212         if (!crls)
 213             goto end;
 214     }
 215
 216     ret = 0;
 217     if (argc < 1) {
 218         if (1 != check(cert_ctx, NULL, untrusted, trusted, crls, e))
 219             ret = -1;
 220     } else {
 221         for (i = 0; i < argc; i++)
 222             if (1 != check(cert_ctx, argv[i], untrusted, trusted, crls, e))
 223                 ret = -1;
 224     }
 225
 226  end:
 227     if (ret == 1) {
 228         BIO_printf(bio_err,
 229                    "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
 230         BIO_printf(bio_err, " [-no_alt_chains] [-attime timestamp]");
 231 #ifndef OPENSSL_NO_ENGINE
 232         BIO_printf(bio_err, " [-engine e]");
 233 #endif
 234         BIO_printf(bio_err, " cert1 cert2 ...\n");
 235
 236         BIO_printf(bio_err, "recognized usages:\n");
 237         for (i = 0; i < X509_PURPOSE_get_count(); i++) {
 238             X509_PURPOSE *ptmp;
 239             ptmp = X509_PURPOSE_get0(i);
 240             BIO_printf(bio_err, "\t%-10s\t%s\n",
 241                        X509_PURPOSE_get0_sname(ptmp),
 242                        X509_PURPOSE_get0_name(ptmp));
 243         }
 244     }
 245     if (vpm)
 246         X509_VERIFY_PARAM_free(vpm);
 247     if (cert_ctx != NULL)
 248         X509_STORE_free(cert_ctx);
 249     sk_X509_pop_free(untrusted, X509_free);
 250     sk_X509_pop_free(trusted, X509_free);
 251     sk_X509_CRL_pop_free(crls, X509_CRL_free);
 252     apps_shutdown();
 253     OPENSSL_EXIT(ret < 0 ? 2 : ret);
 254 }
 255
 256 static int check(X509_STORE *ctx, char *file,
 257                  STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
 258                  STACK_OF(X509_CRL) *crls, ENGINE *e)
 259 {
 260     X509 *x = NULL;
 261     int i = 0, ret = 0;
 262     X509_STORE_CTX *csc;
 263
 264     x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
 265     if (x == NULL)
 266         goto end;
 267     fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
 268
 269     csc = X509_STORE_CTX_new();
 270     if (csc == NULL) {
 271         ERR_print_errors(bio_err);
 272         goto end;
 273     }
 274     X509_STORE_set_flags(ctx, vflags);
 275     if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
 276         ERR_print_errors(bio_err);
 277         goto end;
 278     }
 279     if (tchain)
 280         X509_STORE_CTX_trusted_stack(csc, tchain);
 281     if (crls)
 282         X509_STORE_CTX_set0_crls(csc, crls);
 283     i = X509_verify_cert(csc);
 284     X509_STORE_CTX_free(csc);
 285
 286     ret = 0;
 287  end:
 288     if (i > 0) {
 289         fprintf(stdout, "OK\n");
 290         ret = 1;
 291     } else
 292         ERR_print_errors(bio_err);
 293     if (x != NULL)
 294         X509_free(x);
 295
 296     return (ret);
 297 }
 298
 299 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 300 {
 301     int cert_error = X509_STORE_CTX_get_error(ctx);
 302     X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
 303
 304     if (!ok) {
 305         if (current_cert) {
 306             X509_NAME_print_ex_fp(stdout,
 307                                   X509_get_subject_name(current_cert),
 308                                   0, XN_FLAG_ONELINE);
 309             printf("\n");
 310         }
 311         printf("%serror %d at %d depth lookup:%s\n",
 312                X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
 313                cert_error,
 314                X509_STORE_CTX_get_error_depth(ctx),
 315                X509_verify_cert_error_string(cert_error));
 316         switch (cert_error) {
 317         case X509_V_ERR_NO_EXPLICIT_POLICY:
 318             policies_print(NULL, ctx);
 319         case X509_V_ERR_CERT_HAS_EXPIRED:
 320
 321             /*
 322              * since we are just checking the certificates, it is ok if they
 323              * are self signed. But we should still warn the user.
 324              */
 325
 326         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 327             /* Continue after extension errors too */
 328         case X509_V_ERR_INVALID_CA:
 329         case X509_V_ERR_INVALID_NON_CA:
 330         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 331         case X509_V_ERR_INVALID_PURPOSE:
 332         case X509_V_ERR_CRL_HAS_EXPIRED:
 333         case X509_V_ERR_CRL_NOT_YET_VALID:
 334         case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
 335             ok = 1;
 336
 337         }
 338
 339         return ok;
 340
 341     }
 342     if (cert_error == X509_V_OK && ok == 2)
 343         policies_print(NULL, ctx);
 344     if (!v_verbose)
 345         ERR_clear_error();
 346     return (ok);
 347 }