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, int show_chain);
  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         int crl_download = 0, show_chain = 0;
  92 #ifndef OPENSSL_NO_ENGINE
  93         char *engine=NULL;
  94 #endif
  95
  96         cert_ctx=X509_STORE_new();
  97         if (cert_ctx == NULL) 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                 {
 115                 if (argc >= 1)
 116                         {
 117                         if (strcmp(*argv,"-CApath") == 0)
 118                                 {
 119                                 if (argc-- < 1) goto end;
 120                                 CApath= *(++argv);
 121                                 }
 122                         else if (strcmp(*argv,"-CAfile") == 0)
 123                                 {
 124                                 if (argc-- < 1) goto end;
 125                                 CAfile= *(++argv);
 126                                 }
 127                         else if (args_verify(&argv, &argc, &badarg, bio_err,
 128                                                                         &vpm))
 129                                 {
 130                                 if (badarg)
 131                                         goto end;
 132                                 continue;
 133                                 }
 134                         else if (strcmp(*argv,"-untrusted") == 0)
 135                                 {
 136                                 if (argc-- < 1) goto end;
 137                                 untfile= *(++argv);
 138                                 }
 139                         else if (strcmp(*argv,"-trusted") == 0)
 140                                 {
 141                                 if (argc-- < 1) goto end;
 142                                 trustfile= *(++argv);
 143                                 }
 144                         else if (strcmp(*argv,"-CRLfile") == 0)
 145                                 {
 146                                 if (argc-- < 1) goto end;
 147                                 crlfile= *(++argv);
 148                                 }
 149                         else if (strcmp(*argv,"-crl_download") == 0)
 150                                 crl_download = 1;
 151                         else if (strcmp(*argv,"-show_chain") == 0)
 152                                 show_chain = 1;
 153 #ifndef OPENSSL_NO_ENGINE
 154                         else if (strcmp(*argv,"-engine") == 0)
 155                                 {
 156                                 if (--argc < 1) goto end;
 157                                 engine= *(++argv);
 158                                 }
 159 #endif
 160                         else if (strcmp(*argv,"-help") == 0)
 161                                 goto end;
 162                         else if (strcmp(*argv,"-verbose") == 0)
 163                                 v_verbose=1;
 164                         else if (argv[0][0] == '-')
 165                                 goto end;
 166                         else
 167                                 break;
 168                         argc--;
 169                         argv++;
 170                         }
 171                 else
 172                         break;
 173                 }
 174
 175 #ifndef OPENSSL_NO_ENGINE
 176         e = setup_engine(bio_err, engine, 0);
 177 #endif
 178
 179         if (vpm)
 180                 X509_STORE_set1_param(cert_ctx, vpm);
 181
 182         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
 183         if (lookup == NULL) abort();
 184         if (CAfile) {
 185                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
 186                 if(!i) {
 187                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 188                         ERR_print_errors(bio_err);
 189                         goto end;
 190                 }
 191         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
 192
 193         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
 194         if (lookup == NULL) abort();
 195         if (CApath) {
 196                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
 197                 if(!i) {
 198                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 199                         ERR_print_errors(bio_err);
 200                         goto end;
 201                 }
 202         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
 203
 204         ERR_clear_error();
 205
 206         if(untfile)
 207                 {
 208                 untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
 209                                         NULL, e, "untrusted certificates");
 210                 if(!untrusted)
 211                         goto end;
 212                 }
 213
 214         if(trustfile)
 215                 {
 216                 trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
 217                                         NULL, e, "trusted certificates");
 218                 if(!trusted)
 219                         goto end;
 220                 }
 221
 222         if(crlfile)
 223                 {
 224                 crls = load_crls(bio_err, crlfile, FORMAT_PEM,
 225                                         NULL, e, "other CRLs");
 226                 if(!crls)
 227                         goto end;
 228                 }
 229
 230         if (crl_download)
 231                 store_setup_crl_download(cert_ctx);
 232
 233         ret=0;
 234         if (argc < 1)
 235                 {
 236                 if (1 != check(cert_ctx, NULL, untrusted, trusted, crls, e, show_chain))
 237                         ret=-1;
 238                 }
 239         else
 240                 {
 241                 for (i=0; i<argc; i++)
 242                         if (1 != check(cert_ctx,argv[i], untrusted, trusted, crls, e, show_chain))
 243                                 ret=-1;
 244                 }
 245
 246 end:
 247         if (ret == 1) {
 248                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
 249 #ifndef OPENSSL_NO_ENGINE
 250                 BIO_printf(bio_err," [-engine e]");
 251 #endif
 252                 BIO_printf(bio_err," cert1 cert2 ...\n");
 253
 254                 BIO_printf(bio_err,"recognized usages:\n");
 255                 for(i = 0; i < X509_PURPOSE_get_count(); i++)
 256                         {
 257                         X509_PURPOSE *ptmp;
 258                         ptmp = X509_PURPOSE_get0(i);
 259                         BIO_printf(bio_err, "\t%-10s\t%s\n",
 260                                    X509_PURPOSE_get0_sname(ptmp),
 261                                    X509_PURPOSE_get0_name(ptmp));
 262                         }
 263
 264                 BIO_printf(bio_err,"recognized verify names:\n");
 265                 for(i = 0; i < X509_VERIFY_PARAM_get_count(); i++)
 266                         {
 267                         const X509_VERIFY_PARAM *vptmp;
 268                         vptmp = X509_VERIFY_PARAM_get0(i);
 269                         BIO_printf(bio_err, "\t%-10s\n",
 270                                         X509_VERIFY_PARAM_get0_name(vptmp));
 271                         }
 272
 273         }
 274         if (vpm) X509_VERIFY_PARAM_free(vpm);
 275         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
 276         sk_X509_pop_free(untrusted, X509_free);
 277         sk_X509_pop_free(trusted, X509_free);
 278         sk_X509_CRL_pop_free(crls, X509_CRL_free);
 279         apps_shutdown();
 280         OPENSSL_EXIT(ret < 0 ? 2 : ret);
 281         }
 282
 283 static int check(X509_STORE *ctx, char *file,
 284                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
 285                 STACK_OF(X509_CRL) *crls, ENGINE *e, int show_chain)
 286         {
 287         X509 *x=NULL;
 288         int i=0,ret=0;
 289         X509_STORE_CTX *csc;
 290         STACK_OF(X509) *chain = NULL;
 291
 292         x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
 293         if (x == NULL)
 294                 goto end;
 295         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
 296
 297         csc = X509_STORE_CTX_new();
 298         if (csc == NULL)
 299                 {
 300                 ERR_print_errors(bio_err);
 301                 goto end;
 302                 }
 303         X509_STORE_set_flags(ctx, vflags);
 304         if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
 305                 {
 306                 ERR_print_errors(bio_err);
 307                 goto end;
 308                 }
 309         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
 310         if (crls)
 311                 X509_STORE_CTX_set0_crls(csc, crls);
 312         i=X509_verify_cert(csc);
 313         if (i > 0 && show_chain)
 314                 chain = X509_STORE_CTX_get1_chain(csc);
 315         X509_STORE_CTX_free(csc);
 316
 317         ret=0;
 318 end:
 319         if (i > 0)
 320                 {
 321                 fprintf(stdout,"OK\n");
 322                 ret=1;
 323                 }
 324         else
 325                 ERR_print_errors(bio_err);
 326         if (chain)
 327                 {
 328                 printf("Chain:\n");
 329                 for (i = 0; i < sk_X509_num(chain); i++)
 330                         {
 331                         X509 *cert = sk_X509_value(chain, i);
 332                         printf("depth=%d: ", i);
 333                         X509_NAME_print_ex_fp(stdout,
 334                                 X509_get_subject_name(cert),
 335                                 0, XN_FLAG_ONELINE);
 336                         printf("\n");
 337                         }
 338                 sk_X509_pop_free(chain, X509_free);
 339                 }
 340         if (x != NULL) X509_free(x);
 341
 342         return(ret);
 343         }
 344
 345 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 346         {
 347         int cert_error = X509_STORE_CTX_get_error(ctx);
 348         X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
 349
 350         if (!ok)
 351                 {
 352                 if (current_cert)
 353                         {
 354                         X509_NAME_print_ex_fp(stdout,
 355                                 X509_get_subject_name(current_cert),
 356                                 0, XN_FLAG_ONELINE);
 357                         printf("\n");
 358                         }
 359                 printf("%serror %d at %d depth lookup:%s\n",
 360                         X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
 361                         cert_error,
 362                         X509_STORE_CTX_get_error_depth(ctx),
 363                         X509_verify_cert_error_string(cert_error));
 364                 switch(cert_error)
 365                         {
 366                         case X509_V_ERR_NO_EXPLICIT_POLICY:
 367                                 policies_print(NULL, ctx);
 368                         case X509_V_ERR_CERT_HAS_EXPIRED:
 369
 370                         /* since we are just checking the certificates, it is
 371                          * ok if they are self signed. But we should still warn
 372                          * the user.
 373                          */
 374
 375                         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 376                         /* Continue after extension errors too */
 377                         case X509_V_ERR_INVALID_CA:
 378                         case X509_V_ERR_INVALID_NON_CA:
 379                         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 380                         case X509_V_ERR_INVALID_PURPOSE:
 381                         case X509_V_ERR_CRL_HAS_EXPIRED:
 382                         case X509_V_ERR_CRL_NOT_YET_VALID:
 383                         case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
 384                         ok = 1;
 385
 386                         }
 387
 388                 return ok;
 389
 390                 }
 391         if (cert_error == X509_V_OK && ok == 2)
 392                 policies_print(NULL, ctx);
 393         if (!v_verbose)
 394                 ERR_clear_error();
 395         return(ok);
 396         }