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