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)*other, int purpose);
  74 static STACK_OF(X509) *load_untrusted(char *file);
  75 static int v_verbose=0;
  76
  77 int MAIN(int, char **);
  78
  79 int MAIN(int argc, char **argv)
  80         {
  81         int i,ret=1;
  82         int purpose = -1;
  83         char *CApath=NULL,*CAfile=NULL;
  84         char *untfile = NULL;
  85         STACK_OF(X509) *untrusted = NULL;
  86         X509_STORE *cert_ctx=NULL;
  87         X509_LOOKUP *lookup=NULL;
  88
  89         cert_ctx=X509_STORE_new();
  90         if (cert_ctx == NULL) goto end;
  91         X509_STORE_set_verify_cb_func(cert_ctx,cb);
  92
  93         ERR_load_crypto_strings();
  94
  95         apps_startup();
  96
  97         if (bio_err == NULL)
  98                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
  99                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 100
 101         argc--;
 102         argv++;
 103         for (;;)
 104                 {
 105                 if (argc >= 1)
 106                         {
 107                         if (strcmp(*argv,"-CApath") == 0)
 108                                 {
 109                                 if (argc-- < 1) goto end;
 110                                 CApath= *(++argv);
 111                                 }
 112                         else if (strcmp(*argv,"-CAfile") == 0)
 113                                 {
 114                                 if (argc-- < 1) goto end;
 115                                 CAfile= *(++argv);
 116                                 }
 117                         else if (strcmp(*argv,"-purpose") == 0)
 118                                 {
 119                                 X509_PURPOSE *xptmp;
 120                                 if (argc-- < 1) goto end;
 121                                 i = X509_PURPOSE_get_by_sname(*(++argv));
 122                                 if(i < 0)
 123                                         {
 124                                         BIO_printf(bio_err, "unrecognized purpose\n");
 125                                         goto end;
 126                                         }
 127                                 xptmp = X509_PURPOSE_iget(i);
 128                                 purpose = X509_PURPOSE_get_id(xptmp);
 129                                 }
 130                         else if (strcmp(*argv,"-untrusted") == 0)
 131                                 {
 132                                 if (argc-- < 1) goto end;
 133                                 untfile= *(++argv);
 134                                 }
 135                         else if (strcmp(*argv,"-help") == 0)
 136                                 goto end;
 137                         else if (strcmp(*argv,"-verbose") == 0)
 138                                 v_verbose=1;
 139                         else if (argv[0][0] == '-')
 140                                 goto end;
 141                         else
 142                                 break;
 143                         argc--;
 144                         argv++;
 145                         }
 146                 else
 147                         break;
 148                 }
 149
 150         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
 151         if (lookup == NULL) abort();
 152         if (CAfile) {
 153                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
 154                 if(!i) {
 155                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 156                         ERR_print_errors(bio_err);
 157                         goto end;
 158                 }
 159         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
 160
 161         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
 162         if (lookup == NULL) abort();
 163         if (CApath) {
 164                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
 165                 if(!i) {
 166                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 167                         ERR_print_errors(bio_err);
 168                         goto end;
 169                 }
 170         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
 171
 172         ERR_clear_error();
 173
 174         if(untfile) {
 175                 if(!(untrusted = load_untrusted(untfile))) {
 176                         BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
 177                         ERR_print_errors(bio_err);
 178                         goto end;
 179                 }
 180         }
 181
 182         if (argc < 1) check(cert_ctx, NULL, untrusted, purpose);
 183         else
 184                 for (i=0; i<argc; i++)
 185                         check(cert_ctx,argv[i], untrusted, purpose);
 186         ret=0;
 187 end:
 188         if (ret == 1) {
 189                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] cert1 cert2 ...\n");
 190                 BIO_printf(bio_err,"recognized usages:\n");
 191                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
 192                         X509_PURPOSE *ptmp;
 193                         ptmp = X509_PURPOSE_iget(i);
 194                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_iget_sname(ptmp),
 195                                                                 X509_PURPOSE_iget_name(ptmp));
 196                 }
 197         }
 198         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
 199         sk_X509_pop_free(untrusted, X509_free);
 200         EXIT(ret);
 201         }
 202
 203 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, int purpose)
 204         {
 205         X509 *x=NULL;
 206         BIO *in=NULL;
 207         int i=0,ret=0;
 208         X509_STORE_CTX *csc;
 209
 210         in=BIO_new(BIO_s_file());
 211         if (in == NULL)
 212                 {
 213                 ERR_print_errors(bio_err);
 214                 goto end;
 215                 }
 216
 217         if (file == NULL)
 218                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 219         else
 220                 {
 221                 if (BIO_read_filename(in,file) <= 0)
 222                         {
 223                         perror(file);
 224                         goto end;
 225                         }
 226                 }
 227
 228         x=PEM_read_bio_X509(in,NULL,NULL,NULL);
 229         if (x == NULL)
 230                 {
 231                 fprintf(stdout,"%s: unable to load certificate file\n",
 232                         (file == NULL)?"stdin":file);
 233                 ERR_print_errors(bio_err);
 234                 goto end;
 235                 }
 236         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
 237
 238         csc = X509_STORE_CTX_new();
 239         if (csc == NULL)
 240                 {
 241                 ERR_print_errors(bio_err);
 242                 goto end;
 243                 }
 244         X509_STORE_CTX_init(csc,ctx,x,uchain);
 245         if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
 246         i=X509_verify_cert(csc);
 247         X509_STORE_CTX_free(csc);
 248
 249         ret=0;
 250 end:
 251         if (i)
 252                 {
 253                 fprintf(stdout,"OK\n");
 254                 ret=1;
 255                 }
 256         else
 257                 ERR_print_errors(bio_err);
 258         if (x != NULL) X509_free(x);
 259         if (in != NULL) BIO_free(in);
 260
 261         return(ret);
 262         }
 263
 264 static STACK_OF(X509) *load_untrusted(char *certfile)
 265 {
 266         STACK_OF(X509_INFO) *sk=NULL;
 267         STACK_OF(X509) *stack=NULL, *ret=NULL;
 268         BIO *in=NULL;
 269         X509_INFO *xi;
 270
 271         if(!(stack = sk_X509_new_null())) {
 272                 BIO_printf(bio_err,"memory allocation failure\n");
 273                 goto end;
 274         }
 275
 276         if(!(in=BIO_new_file(certfile, "r"))) {
 277                 BIO_printf(bio_err,"error opening the file, %s\n",certfile);
 278                 goto end;
 279         }
 280
 281         /* This loads from a file, a stack of x509/crl/pkey sets */
 282         if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
 283                 BIO_printf(bio_err,"error reading the file, %s\n",certfile);
 284                 goto end;
 285         }
 286
 287         /* scan over it and pull out the certs */
 288         while (sk_X509_INFO_num(sk))
 289                 {
 290                 xi=sk_X509_INFO_shift(sk);
 291                 if (xi->x509 != NULL)
 292                         {
 293                         sk_X509_push(stack,xi->x509);
 294                         xi->x509=NULL;
 295                         }
 296                 X509_INFO_free(xi);
 297                 }
 298         if(!sk_X509_num(stack)) {
 299                 BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
 300                 sk_X509_free(stack);
 301                 goto end;
 302         }
 303         ret=stack;
 304 end:
 305         BIO_free(in);
 306         sk_X509_INFO_free(sk);
 307         return(ret);
 308         }
 309
 310 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 311         {
 312         char buf[256];
 313
 314         if (!ok)
 315                 {
 316                 X509_NAME_oneline(
 317                                 X509_get_subject_name(ctx->current_cert),buf,256);
 318                 printf("%s\n",buf);
 319                 printf("error %d at %d depth lookup:%s\n",ctx->error,
 320                         ctx->error_depth,
 321                         X509_verify_cert_error_string(ctx->error));
 322                 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
 323                 /* since we are just checking the certificates, it is
 324                  * ok if they are self signed. But we should still warn
 325                  * the user.
 326                  */
 327                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
 328                 /* Continue after extension errors too */
 329                 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
 330                 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
 331                 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
 332                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
 333                 }
 334         if (!v_verbose)
 335                 ERR_clear_error();
 336         return(ok);
 337         }
 338