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 #include <openssl/engine.h>
  69
  70 #undef PROG
  71 #define PROG    verify_main
  72
  73 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
  74 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose);
  75 static STACK_OF(X509) *load_untrusted(char *file);
  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;
  84         int purpose = -1;
  85         char *CApath=NULL,*CAfile=NULL;
  86         char *untfile = NULL, *trustfile = NULL;
  87         STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
  88         X509_STORE *cert_ctx=NULL;
  89         X509_LOOKUP *lookup=NULL;
  90         char *engine=NULL;
  91
  92         cert_ctx=X509_STORE_new();
  93         if (cert_ctx == NULL) goto end;
  94         X509_STORE_set_verify_cb_func(cert_ctx,cb);
  95
  96         ERR_load_crypto_strings();
  97
  98         apps_startup();
  99
 100         if (bio_err == NULL)
 101                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 102                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 103
 104         argc--;
 105         argv++;
 106         for (;;)
 107                 {
 108                 if (argc >= 1)
 109                         {
 110                         if (strcmp(*argv,"-CApath") == 0)
 111                                 {
 112                                 if (argc-- < 1) goto end;
 113                                 CApath= *(++argv);
 114                                 }
 115                         else if (strcmp(*argv,"-CAfile") == 0)
 116                                 {
 117                                 if (argc-- < 1) goto end;
 118                                 CAfile= *(++argv);
 119                                 }
 120                         else if (strcmp(*argv,"-purpose") == 0)
 121                                 {
 122                                 X509_PURPOSE *xptmp;
 123                                 if (argc-- < 1) goto end;
 124                                 i = X509_PURPOSE_get_by_sname(*(++argv));
 125                                 if(i < 0)
 126                                         {
 127                                         BIO_printf(bio_err, "unrecognized purpose\n");
 128                                         goto end;
 129                                         }
 130                                 xptmp = X509_PURPOSE_get0(i);
 131                                 purpose = X509_PURPOSE_get_id(xptmp);
 132                                 }
 133                         else if (strcmp(*argv,"-untrusted") == 0)
 134                                 {
 135                                 if (argc-- < 1) goto end;
 136                                 untfile= *(++argv);
 137                                 }
 138                         else if (strcmp(*argv,"-trusted") == 0)
 139                                 {
 140                                 if (argc-- < 1) goto end;
 141                                 trustfile= *(++argv);
 142                                 }
 143                         else if (strcmp(*argv,"-engine") == 0)
 144                                 {
 145                                 if (--argc < 1) goto end;
 146                                 engine= *(++argv);
 147                                 }
 148                         else if (strcmp(*argv,"-help") == 0)
 149                                 goto end;
 150                         else if (strcmp(*argv,"-issuer_checks") == 0)
 151                                 vflags |= X509_V_FLAG_CB_ISSUER_CHECK;
 152                         else if (strcmp(*argv,"-crl_check") == 0)
 153                                 vflags |= X509_V_FLAG_CRL_CHECK;
 154                         else if (strcmp(*argv,"-crl_check_all") == 0)
 155                                 vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
 156                         else if (strcmp(*argv,"-verbose") == 0)
 157                                 v_verbose=1;
 158                         else if (argv[0][0] == '-')
 159                                 goto end;
 160                         else
 161                                 break;
 162                         argc--;
 163                         argv++;
 164                         }
 165                 else
 166                         break;
 167                 }
 168
 169         if (engine != NULL)
 170                 {
 171                 if((e = ENGINE_by_id(engine)) == NULL)
 172                         {
 173                         BIO_printf(bio_err,"invalid engine \"%s\"\n",
 174                                 engine);
 175                         goto end;
 176                         }
 177                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
 178                         {
 179                         BIO_printf(bio_err,"can't use that engine\n");
 180                         goto end;
 181                         }
 182                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine);
 183                 /* Free our "structural" reference. */
 184                 ENGINE_free(e);
 185                 }
 186
 187         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
 188         if (lookup == NULL) abort();
 189         if (CAfile) {
 190                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
 191                 if(!i) {
 192                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 193                         ERR_print_errors(bio_err);
 194                         goto end;
 195                 }
 196         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
 197
 198         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
 199         if (lookup == NULL) abort();
 200         if (CApath) {
 201                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
 202                 if(!i) {
 203                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 204                         ERR_print_errors(bio_err);
 205                         goto end;
 206                 }
 207         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
 208
 209         ERR_clear_error();
 210
 211         if(untfile) {
 212                 if(!(untrusted = load_untrusted(untfile))) {
 213                         BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
 214                         ERR_print_errors(bio_err);
 215                         goto end;
 216                 }
 217         }
 218
 219         if(trustfile) {
 220                 if(!(trusted = load_untrusted(trustfile))) {
 221                         BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
 222                         ERR_print_errors(bio_err);
 223                         goto end;
 224                 }
 225         }
 226
 227         if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose);
 228         else
 229                 for (i=0; i<argc; i++)
 230                         check(cert_ctx,argv[i], untrusted, trusted, purpose);
 231         ret=0;
 232 end:
 233         if (ret == 1) {
 234                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check] [-engine e] cert1 cert2 ...\n");
 235                 BIO_printf(bio_err,"recognized usages:\n");
 236                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
 237                         X509_PURPOSE *ptmp;
 238                         ptmp = X509_PURPOSE_get0(i);
 239                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
 240                                                                 X509_PURPOSE_get0_name(ptmp));
 241                 }
 242         }
 243         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
 244         sk_X509_pop_free(untrusted, X509_free);
 245         sk_X509_pop_free(trusted, X509_free);
 246         EXIT(ret);
 247         }
 248
 249 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose)
 250         {
 251         X509 *x=NULL;
 252         BIO *in=NULL;
 253         int i=0,ret=0;
 254         X509_STORE_CTX *csc;
 255
 256         in=BIO_new(BIO_s_file());
 257         if (in == NULL)
 258                 {
 259                 ERR_print_errors(bio_err);
 260                 goto end;
 261                 }
 262
 263         if (file == NULL)
 264                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 265         else
 266                 {
 267                 if (BIO_read_filename(in,file) <= 0)
 268                         {
 269                         perror(file);
 270                         goto end;
 271                         }
 272                 }
 273
 274         x=PEM_read_bio_X509(in,NULL,NULL,NULL);
 275         if (x == NULL)
 276                 {
 277                 fprintf(stdout,"%s: unable to load certificate file\n",
 278                         (file == NULL)?"stdin":file);
 279                 ERR_print_errors(bio_err);
 280                 goto end;
 281                 }
 282         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
 283
 284         csc = X509_STORE_CTX_new();
 285         if (csc == NULL)
 286                 {
 287                 ERR_print_errors(bio_err);
 288                 goto end;
 289                 }
 290         X509_STORE_CTX_init(csc,ctx,x,uchain);
 291         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
 292         if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
 293         X509_STORE_CTX_set_flags(csc, vflags);
 294         i=X509_verify_cert(csc);
 295         X509_STORE_CTX_free(csc);
 296
 297         ret=0;
 298 end:
 299         if (i)
 300                 {
 301                 fprintf(stdout,"OK\n");
 302                 ret=1;
 303                 }
 304         else
 305                 ERR_print_errors(bio_err);
 306         if (x != NULL) X509_free(x);
 307         if (in != NULL) BIO_free(in);
 308
 309         return(ret);
 310         }
 311
 312 static STACK_OF(X509) *load_untrusted(char *certfile)
 313 {
 314         STACK_OF(X509_INFO) *sk=NULL;
 315         STACK_OF(X509) *stack=NULL, *ret=NULL;
 316         BIO *in=NULL;
 317         X509_INFO *xi;
 318
 319         if(!(stack = sk_X509_new_null())) {
 320                 BIO_printf(bio_err,"memory allocation failure\n");
 321                 goto end;
 322         }
 323
 324         if(!(in=BIO_new_file(certfile, "r"))) {
 325                 BIO_printf(bio_err,"error opening the file, %s\n",certfile);
 326                 goto end;
 327         }
 328
 329         /* This loads from a file, a stack of x509/crl/pkey sets */
 330         if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
 331                 BIO_printf(bio_err,"error reading the file, %s\n",certfile);
 332                 goto end;
 333         }
 334
 335         /* scan over it and pull out the certs */
 336         while (sk_X509_INFO_num(sk))
 337                 {
 338                 xi=sk_X509_INFO_shift(sk);
 339                 if (xi->x509 != NULL)
 340                         {
 341                         sk_X509_push(stack,xi->x509);
 342                         xi->x509=NULL;
 343                         }
 344                 X509_INFO_free(xi);
 345                 }
 346         if(!sk_X509_num(stack)) {
 347                 BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
 348                 sk_X509_free(stack);
 349                 goto end;
 350         }
 351         ret=stack;
 352 end:
 353         BIO_free(in);
 354         sk_X509_INFO_free(sk);
 355         return(ret);
 356         }
 357
 358 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 359         {
 360         char buf[256];
 361
 362         if (!ok)
 363                 {
 364                 X509_NAME_oneline(
 365                                 X509_get_subject_name(ctx->current_cert),buf,256);
 366                 printf("%s\n",buf);
 367                 printf("error %d at %d depth lookup:%s\n",ctx->error,
 368                         ctx->error_depth,
 369                         X509_verify_cert_error_string(ctx->error));
 370                 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
 371                 /* since we are just checking the certificates, it is
 372                  * ok if they are self signed. But we should still warn
 373                  * the user.
 374                  */
 375                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
 376                 /* Continue after extension errors too */
 377                 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
 378                 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
 379                 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
 380                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
 381                 if (ctx->error == X509_V_ERR_CRL_HAS_EXPIRED) ok=1;
 382                 if (ctx->error == X509_V_ERR_CRL_NOT_YET_VALID) ok=1;
 383                 }
 384         if (!v_verbose)
 385                 ERR_clear_error();
 386         return(ok);
 387         }
 388