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, time_t at_time);
  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         char *checktime_string = NULL;
  87         long int timestamp;
  88         time_t t = 0;
  89         STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
  90         STACK_OF(X509_CRL) *crls = NULL;
  91         X509_STORE *cert_ctx=NULL;
  92         X509_LOOKUP *lookup=NULL;
  93         X509_VERIFY_PARAM *vpm = NULL;
  94 #ifndef OPENSSL_NO_ENGINE
  95         char *engine=NULL;
  96 #endif
  97
  98         cert_ctx=X509_STORE_new();
  99         if (cert_ctx == NULL) goto end;
 100         X509_STORE_set_verify_cb(cert_ctx,cb);
 101
 102         ERR_load_crypto_strings();
 103
 104         apps_startup();
 105
 106         if (bio_err == NULL)
 107                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 108                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 109
 110         if (!load_config(bio_err, NULL))
 111                 goto end;
 112
 113         argc--;
 114         argv++;
 115         for (;;)
 116                 {
 117                 if (argc >= 1)
 118                         {
 119                         if (strcmp(*argv,"-CApath") == 0)
 120                                 {
 121                                 if (argc-- < 1) goto end;
 122                                 CApath= *(++argv);
 123                                 }
 124                         else if (strcmp(*argv,"-CAfile") == 0)
 125                                 {
 126                                 if (argc-- < 1) goto end;
 127                                 CAfile= *(++argv);
 128                                 }
 129                         else if (args_verify(&argv, &argc, &badarg, bio_err,
 130                                                                         &vpm))
 131                                 {
 132                                 if (badarg)
 133                                         goto end;
 134                                 continue;
 135                                 }
 136                         else if (strcmp(*argv,"-untrusted") == 0)
 137                                 {
 138                                 if (argc-- < 1) goto end;
 139                                 untfile= *(++argv);
 140                                 }
 141                         else if (strcmp(*argv,"-trusted") == 0)
 142                                 {
 143                                 if (argc-- < 1) goto end;
 144                                 trustfile= *(++argv);
 145                                 }
 146                         else if (strcmp(*argv,"-CRLfile") == 0)
 147                                 {
 148                                 if (argc-- < 1) goto end;
 149                                 crlfile= *(++argv);
 150                                 }
 151                         else if (strcmp(*argv,"-attime") == 0)
 152                                 {
 153                                 if (argc-- < 1) goto end;
 154                                 checktime_string= *(++argv);
 155                                 }
 156 #ifndef OPENSSL_NO_ENGINE
 157                         else if (strcmp(*argv,"-engine") == 0)
 158                                 {
 159                                 if (--argc < 1) goto end;
 160                                 engine= *(++argv);
 161                                 }
 162 #endif
 163                         else if (strcmp(*argv,"-help") == 0)
 164                                 goto end;
 165                         else if (strcmp(*argv,"-verbose") == 0)
 166                                 v_verbose=1;
 167                         else if (argv[0][0] == '-')
 168                                 goto end;
 169                         else
 170                                 break;
 171                         argc--;
 172                         argv++;
 173                         }
 174                 else
 175                         break;
 176                 }
 177
 178 #ifndef OPENSSL_NO_ENGINE
 179         e = setup_engine(bio_err, engine, 0);
 180 #endif
 181
 182         if (vpm)
 183                 X509_STORE_set1_param(cert_ctx, vpm);
 184
 185         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
 186         if (lookup == NULL) abort();
 187         if (CAfile) {
 188                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
 189                 if(!i) {
 190                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 191                         ERR_print_errors(bio_err);
 192                         goto end;
 193                 }
 194         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
 195
 196         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
 197         if (lookup == NULL) abort();
 198         if (CApath) {
 199                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
 200                 if(!i) {
 201                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 202                         ERR_print_errors(bio_err);
 203                         goto end;
 204                 }
 205         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
 206
 207         ERR_clear_error();
 208
 209         if(untfile)
 210                 {
 211                 untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
 212                                         NULL, e, "untrusted certificates");
 213                 if(!untrusted)
 214                         goto end;
 215                 }
 216
 217         if(trustfile)
 218                 {
 219                 trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
 220                                         NULL, e, "trusted certificates");
 221                 if(!trusted)
 222                         goto end;
 223                 }
 224
 225         if(crlfile)
 226                 {
 227                 crls = load_crls(bio_err, crlfile, FORMAT_PEM,
 228                                         NULL, e, "other CRLs");
 229                 if(!crls)
 230                         goto end;
 231                 }
 232
 233         if(checktime_string)
 234                 {
 235                 /* interpret the -attime argument as seconds since Epoch */
 236                 if (sscanf(checktime_string, "%li", &timestamp) != 1)
 237                         {
 238                         BIO_printf(bio_err, "Error parsing timestamp %s\n",
 239                                            checktime_string);
 240                         ERR_print_errors(bio_err);
 241                         goto end;
 242                         }
 243                 t = (time_t) timestamp;  /* on some platforms time_t may be a float */
 244                 }
 245
 246         if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, crls, e, t);
 247         else
 248                 for (i=0; i<argc; i++)
 249                         check(cert_ctx,argv[i], untrusted, trusted, crls, e, t);
 250         ret=0;
 251 end:
 252         if (ret == 1) {
 253                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
 254                 BIO_printf(bio_err," [-attime timestamp]");
 255 #ifndef OPENSSL_NO_ENGINE
 256                 BIO_printf(bio_err," [-engine e]");
 257 #endif
 258                 BIO_printf(bio_err," cert1 cert2 ...\n");
 259                 BIO_printf(bio_err,"recognized usages:\n");
 260                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
 261                         X509_PURPOSE *ptmp;
 262                         ptmp = X509_PURPOSE_get0(i);
 263                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
 264                                                                 X509_PURPOSE_get0_name(ptmp));
 265                 }
 266         }
 267         if (vpm) X509_VERIFY_PARAM_free(vpm);
 268         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
 269         sk_X509_pop_free(untrusted, X509_free);
 270         sk_X509_pop_free(trusted, X509_free);
 271         sk_X509_CRL_pop_free(crls, X509_CRL_free);
 272         apps_shutdown();
 273         OPENSSL_EXIT(ret);
 274         }
 275
 276 static int check(X509_STORE *ctx, char *file,
 277                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
 278                 STACK_OF(X509_CRL) *crls, ENGINE *e, time_t at_time)
 279         {
 280         X509 *x=NULL;
 281         int i=0,ret=0;
 282         X509_STORE_CTX *csc;
 283
 284         x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
 285         if (x == NULL)
 286                 goto end;
 287         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
 288
 289         csc = X509_STORE_CTX_new();
 290         if (csc == NULL)
 291                 {
 292                 ERR_print_errors(bio_err);
 293                 goto end;
 294                 }
 295         X509_STORE_set_flags(ctx, vflags);
 296         if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
 297                 {
 298                 ERR_print_errors(bio_err);
 299                 goto end;
 300                 }
 301         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
 302         if (crls)
 303                 X509_STORE_CTX_set0_crls(csc, crls);
 304         if (at_time)
 305                 X509_STORE_CTX_set_time(csc, 0, at_time);
 306
 307         i=X509_verify_cert(csc);
 308         X509_STORE_CTX_free(csc);
 309
 310         ret=0;
 311 end:
 312         if (i > 0)
 313                 {
 314                 fprintf(stdout,"OK\n");
 315                 ret=1;
 316                 }
 317         else
 318                 ERR_print_errors(bio_err);
 319         if (x != NULL) X509_free(x);
 320
 321         return(ret);
 322         }
 323
 324 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 325         {
 326         int cert_error = X509_STORE_CTX_get_error(ctx);
 327         X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
 328
 329         if (!ok)
 330                 {
 331                 if (current_cert)
 332                         {
 333                         X509_NAME_print_ex_fp(stdout,
 334                                 X509_get_subject_name(current_cert),
 335                                 0, XN_FLAG_ONELINE);
 336                         printf("\n");
 337                         }
 338                 printf("%serror %d at %d depth lookup:%s\n",
 339                         X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
 340                         cert_error,
 341                         X509_STORE_CTX_get_error_depth(ctx),
 342                         X509_verify_cert_error_string(cert_error));
 343                 switch(cert_error)
 344                         {
 345                         case X509_V_ERR_NO_EXPLICIT_POLICY:
 346                                 policies_print(NULL, ctx);
 347                         case X509_V_ERR_CERT_HAS_EXPIRED:
 348
 349                         /* since we are just checking the certificates, it is
 350                          * ok if they are self signed. But we should still warn
 351                          * the user.
 352                          */
 353
 354                         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 355                         /* Continue after extension errors too */
 356                         case X509_V_ERR_INVALID_CA:
 357                         case X509_V_ERR_INVALID_NON_CA:
 358                         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 359                         case X509_V_ERR_INVALID_PURPOSE:
 360                         case X509_V_ERR_CRL_HAS_EXPIRED:
 361                         case X509_V_ERR_CRL_NOT_YET_VALID:
 362                         case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
 363                         ok = 1;
 364
 365                         }
 366
 367                 return ok;
 368
 369                 }
 370         if (cert_error == X509_V_OK && ok == 2)
 371                 policies_print(NULL, ctx);
 372         if (!v_verbose)
 373                 ERR_clear_error();
 374         return(ok);
 375         }