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, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose, ENGINE *e);
  74 static STACK_OF(X509) *load_untrusted(char *file);
  75 static int v_verbose=0, vflags = 0;
  76
  77 int MAIN(int, char **);
  78
  79 int MAIN(int argc, char **argv)
  80         {
  81         ENGINE *e = NULL;
  82         int i,ret=1;
  83         int purpose = -1;
  84         char *CApath=NULL,*CAfile=NULL;
  85         char *untfile = NULL, *trustfile = NULL;
  86         STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
  87         X509_STORE *cert_ctx=NULL;
  88         X509_LOOKUP *lookup=NULL;
  89         char *engine=NULL;
  90
  91         cert_ctx=X509_STORE_new();
  92         if (cert_ctx == NULL) goto end;
  93         X509_STORE_set_verify_cb_func(cert_ctx,cb);
  94
  95         ERR_load_crypto_strings();
  96
  97         apps_startup();
  98
  99         if (bio_err == NULL)
 100                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 101                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 102
 103         if (!load_config(bio_err, NULL))
 104                 goto end;
 105
 106         argc--;
 107         argv++;
 108         for (;;)
 109                 {
 110                 if (argc >= 1)
 111                         {
 112                         if (strcmp(*argv,"-CApath") == 0)
 113                                 {
 114                                 if (argc-- < 1) goto end;
 115                                 CApath= *(++argv);
 116                                 }
 117                         else if (strcmp(*argv,"-CAfile") == 0)
 118                                 {
 119                                 if (argc-- < 1) goto end;
 120                                 CAfile= *(++argv);
 121                                 }
 122                         else if (strcmp(*argv,"-purpose") == 0)
 123                                 {
 124                                 X509_PURPOSE *xptmp;
 125                                 if (argc-- < 1) goto end;
 126                                 i = X509_PURPOSE_get_by_sname(*(++argv));
 127                                 if(i < 0)
 128                                         {
 129                                         BIO_printf(bio_err, "unrecognized purpose\n");
 130                                         goto end;
 131                                         }
 132                                 xptmp = X509_PURPOSE_get0(i);
 133                                 purpose = X509_PURPOSE_get_id(xptmp);
 134                                 }
 135                         else if (strcmp(*argv,"-untrusted") == 0)
 136                                 {
 137                                 if (argc-- < 1) goto end;
 138                                 untfile= *(++argv);
 139                                 }
 140                         else if (strcmp(*argv,"-trusted") == 0)
 141                                 {
 142                                 if (argc-- < 1) goto end;
 143                                 trustfile= *(++argv);
 144                                 }
 145                         else if (strcmp(*argv,"-engine") == 0)
 146                                 {
 147                                 if (--argc < 1) goto end;
 148                                 engine= *(++argv);
 149                                 }
 150                         else if (strcmp(*argv,"-help") == 0)
 151                                 goto end;
 152                         else if (strcmp(*argv,"-ignore_critical") == 0)
 153                                 vflags |= X509_V_FLAG_IGNORE_CRITICAL;
 154                         else if (strcmp(*argv,"-issuer_checks") == 0)
 155                                 vflags |= X509_V_FLAG_CB_ISSUER_CHECK;
 156                         else if (strcmp(*argv,"-crl_check") == 0)
 157                                 vflags |= X509_V_FLAG_CRL_CHECK;
 158                         else if (strcmp(*argv,"-crl_check_all") == 0)
 159                                 vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
 160                         else if (strcmp(*argv,"-verbose") == 0)
 161                                 v_verbose=1;
 162                         else if (argv[0][0] == '-')
 163                                 goto end;
 164                         else
 165                                 break;
 166                         argc--;
 167                         argv++;
 168                         }
 169                 else
 170                         break;
 171                 }
 172
 173         e = setup_engine(bio_err, engine, 0);
 174
 175         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
 176         if (lookup == NULL) abort();
 177         if (CAfile) {
 178                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
 179                 if(!i) {
 180                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 181                         ERR_print_errors(bio_err);
 182                         goto end;
 183                 }
 184         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
 185
 186         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
 187         if (lookup == NULL) abort();
 188         if (CApath) {
 189                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
 190                 if(!i) {
 191                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 192                         ERR_print_errors(bio_err);
 193                         goto end;
 194                 }
 195         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
 196
 197         ERR_clear_error();
 198
 199         if(untfile) {
 200                 if(!(untrusted = load_untrusted(untfile))) {
 201                         BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
 202                         ERR_print_errors(bio_err);
 203                         goto end;
 204                 }
 205         }
 206
 207         if(trustfile) {
 208                 if(!(trusted = load_untrusted(trustfile))) {
 209                         BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
 210                         ERR_print_errors(bio_err);
 211                         goto end;
 212                 }
 213         }
 214
 215         if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose, e);
 216         else
 217                 for (i=0; i<argc; i++)
 218                         check(cert_ctx,argv[i], untrusted, trusted, purpose, e);
 219         ret=0;
 220 end:
 221         if (ret == 1) {
 222                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check] [-engine e] cert1 cert2 ...\n");
 223                 BIO_printf(bio_err,"recognized usages:\n");
 224                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
 225                         X509_PURPOSE *ptmp;
 226                         ptmp = X509_PURPOSE_get0(i);
 227                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
 228                                                                 X509_PURPOSE_get0_name(ptmp));
 229                 }
 230         }
 231         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
 232         sk_X509_pop_free(untrusted, X509_free);
 233         sk_X509_pop_free(trusted, X509_free);
 234         apps_shutdown();
 235         EXIT(ret);
 236         }
 237
 238 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose, ENGINE *e)
 239         {
 240         X509 *x=NULL;
 241         int i=0,ret=0;
 242         X509_STORE_CTX *csc;
 243
 244         x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
 245         if (x == NULL)
 246                 goto end;
 247         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
 248
 249         csc = X509_STORE_CTX_new();
 250         if (csc == NULL)
 251                 {
 252                 ERR_print_errors(bio_err);
 253                 goto end;
 254                 }
 255         X509_STORE_set_flags(ctx, vflags);
 256         if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
 257                 {
 258                 ERR_print_errors(bio_err);
 259                 goto end;
 260                 }
 261         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
 262         if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
 263         i=X509_verify_cert(csc);
 264         X509_STORE_CTX_free(csc);
 265
 266         ret=0;
 267 end:
 268         if (i)
 269                 {
 270                 fprintf(stdout,"OK\n");
 271                 ret=1;
 272                 }
 273         else
 274                 ERR_print_errors(bio_err);
 275         if (x != NULL) X509_free(x);
 276
 277         return(ret);
 278         }
 279
 280 static STACK_OF(X509) *load_untrusted(char *certfile)
 281 {
 282         STACK_OF(X509_INFO) *sk=NULL;
 283         STACK_OF(X509) *stack=NULL, *ret=NULL;
 284         BIO *in=NULL;
 285         X509_INFO *xi;
 286
 287         if(!(stack = sk_X509_new_null())) {
 288                 BIO_printf(bio_err,"memory allocation failure\n");
 289                 goto end;
 290         }
 291
 292         if(!(in=BIO_new_file(certfile, "r"))) {
 293                 BIO_printf(bio_err,"error opening the file, %s\n",certfile);
 294                 goto end;
 295         }
 296
 297         /* This loads from a file, a stack of x509/crl/pkey sets */
 298         if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
 299                 BIO_printf(bio_err,"error reading the file, %s\n",certfile);
 300                 goto end;
 301         }
 302
 303         /* scan over it and pull out the certs */
 304         while (sk_X509_INFO_num(sk))
 305                 {
 306                 xi=sk_X509_INFO_shift(sk);
 307                 if (xi->x509 != NULL)
 308                         {
 309                         sk_X509_push(stack,xi->x509);
 310                         xi->x509=NULL;
 311                         }
 312                 X509_INFO_free(xi);
 313                 }
 314         if(!sk_X509_num(stack)) {
 315                 BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
 316                 sk_X509_free(stack);
 317                 goto end;
 318         }
 319         ret=stack;
 320 end:
 321         BIO_free(in);
 322         sk_X509_INFO_free(sk);
 323         return(ret);
 324         }
 325
 326 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 327         {
 328         char buf[256];
 329
 330         if (!ok)
 331                 {
 332                 X509_NAME_oneline(
 333                                 X509_get_subject_name(ctx->current_cert),buf,256);
 334                 printf("%s\n",buf);
 335                 printf("error %d at %d depth lookup:%s\n",ctx->error,
 336                         ctx->error_depth,
 337                         X509_verify_cert_error_string(ctx->error));
 338                 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
 339                 /* since we are just checking the certificates, it is
 340                  * ok if they are self signed. But we should still warn
 341                  * the user.
 342                  */
 343                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
 344                 /* Continue after extension errors too */
 345                 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
 346                 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
 347                 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
 348                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
 349                 if (ctx->error == X509_V_ERR_CRL_HAS_EXPIRED) ok=1;
 350                 if (ctx->error == X509_V_ERR_CRL_NOT_YET_VALID) ok=1;
 351                 if (ctx->error == X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION) ok=1;
 352                 }
 353         if (!v_verbose)
 354                 ERR_clear_error();
 355         return(ok);
 356         }
 357