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