bin/openssl/verify.c

   1 /* $OpenBSD: verify.c,v 1.7 2018/02/07 05:47:55 jsing Exp $ */
   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
  63 #include "apps.h"
  64
  65 #include <openssl/bio.h>
  66 #include <openssl/err.h>
  67 #include <openssl/pem.h>
  68 #include <openssl/x509.h>
  69 #include <openssl/x509v3.h>
  70
  71 static int cb(int ok, X509_STORE_CTX * ctx);
  72 static int check(X509_STORE * ctx, char *file, STACK_OF(X509) * uchain,
  73     STACK_OF(X509) * tchain, STACK_OF(X509_CRL) * crls);
  74 static int v_verbose = 0, vflags = 0;
  75
  76 int
  77 verify_main(int argc, char **argv)
  78 {
  79         int i, ret = 1, badarg = 0;
  80         char *CApath = NULL, *CAfile = NULL;
  81         char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
  82         STACK_OF(X509) * untrusted = NULL, *trusted = NULL;
  83         STACK_OF(X509_CRL) * crls = NULL;
  84         X509_STORE *cert_ctx = NULL;
  85         X509_LOOKUP *lookup = NULL;
  86         X509_VERIFY_PARAM *vpm = NULL;
  87
  88         if (single_execution) {
  89                 if (pledge("stdio rpath", NULL) == -1) {
  90                         perror("pledge");
  91                         exit(1);
  92                 }
  93         }
  94
  95         cert_ctx = X509_STORE_new();
  96         if (cert_ctx == NULL)
  97                 goto end;
  98         X509_STORE_set_verify_cb(cert_ctx, cb);
  99
 100         argc--;
 101         argv++;
 102         for (;;) {
 103                 if (argc >= 1) {
 104                         if (strcmp(*argv, "-CApath") == 0) {
 105                                 if (argc-- < 1)
 106                                         goto end;
 107                                 CApath = *(++argv);
 108                         } else if (strcmp(*argv, "-CAfile") == 0) {
 109                                 if (argc-- < 1)
 110                                         goto end;
 111                                 CAfile = *(++argv);
 112                         } else if (args_verify(&argv, &argc, &badarg, bio_err,
 113                             &vpm)) {
 114                                 if (badarg)
 115                                         goto end;
 116                                 continue;
 117                         } else if (strcmp(*argv, "-untrusted") == 0) {
 118                                 if (argc-- < 1)
 119                                         goto end;
 120                                 untfile = *(++argv);
 121                         } else if (strcmp(*argv, "-trusted") == 0) {
 122                                 if (argc-- < 1)
 123                                         goto end;
 124                                 trustfile = *(++argv);
 125                         } else if (strcmp(*argv, "-CRLfile") == 0) {
 126                                 if (argc-- < 1)
 127                                         goto end;
 128                                 crlfile = *(++argv);
 129                         }
 130                         else if (strcmp(*argv, "-help") == 0)
 131                                 goto end;
 132                         else if (strcmp(*argv, "-verbose") == 0)
 133                                 v_verbose = 1;
 134                         else if (argv[0][0] == '-')
 135                                 goto end;
 136                         else
 137                                 break;
 138                         argc--;
 139                         argv++;
 140                 } else
 141                         break;
 142         }
 143
 144         if (vpm)
 145                 X509_STORE_set1_param(cert_ctx, vpm);
 146
 147         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 148         if (lookup == NULL)
 149                 abort();
 150         if (CAfile) {
 151                 i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
 152                 if (!i) {
 153                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 154                         ERR_print_errors(bio_err);
 155                         goto end;
 156                 }
 157         } else
 158                 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
 159
 160         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 161         if (lookup == NULL)
 162                 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
 171                 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
 172
 173         ERR_clear_error();
 174
 175         if (untfile) {
 176                 untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
 177                     NULL, "untrusted certificates");
 178                 if (!untrusted)
 179                         goto end;
 180         }
 181         if (trustfile) {
 182                 trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
 183                     NULL, "trusted certificates");
 184                 if (!trusted)
 185                         goto end;
 186         }
 187         if (crlfile) {
 188                 crls = load_crls(bio_err, crlfile, FORMAT_PEM,
 189                     NULL, "other CRLs");
 190                 if (!crls)
 191                         goto end;
 192         }
 193         ret = 0;
 194         if (argc < 1) {
 195                 if (1 != check(cert_ctx, NULL, untrusted, trusted, crls))
 196                         ret = -1;
 197         } else {
 198                 for (i = 0; i < argc; i++)
 199                         if (1 != check(cert_ctx, argv[i], untrusted, trusted,
 200                             crls))
 201                                 ret = -1;
 202         }
 203
 204  end:
 205         if (ret == 1) {
 206                 BIO_printf(bio_err, "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
 207                 BIO_printf(bio_err, " [-attime timestamp]");
 208                 BIO_printf(bio_err, " cert1 cert2 ...\n");
 209
 210                 BIO_printf(bio_err, "recognized usages:\n");
 211                 for (i = 0; i < X509_PURPOSE_get_count(); i++) {
 212                         X509_PURPOSE *ptmp;
 213                         ptmp = X509_PURPOSE_get0(i);
 214                         BIO_printf(bio_err, "\t%-10s\t%s\n",
 215                             X509_PURPOSE_get0_sname(ptmp),
 216                             X509_PURPOSE_get0_name(ptmp));
 217                 }
 218         }
 219         if (vpm)
 220                 X509_VERIFY_PARAM_free(vpm);
 221         if (cert_ctx != NULL)
 222                 X509_STORE_free(cert_ctx);
 223         sk_X509_pop_free(untrusted, X509_free);
 224         sk_X509_pop_free(trusted, X509_free);
 225         sk_X509_CRL_pop_free(crls, X509_CRL_free);
 226
 227         return (ret < 0 ? 2 : ret);
 228 }
 229
 230 static int
 231 check(X509_STORE * ctx, char *file, STACK_OF(X509) * uchain,
 232     STACK_OF(X509) * tchain, STACK_OF(X509_CRL) * crls)
 233 {
 234         X509 *x = NULL;
 235         int i = 0, ret = 0;
 236         X509_STORE_CTX *csc;
 237
 238         x = load_cert(bio_err, file, FORMAT_PEM, NULL, "certificate file");
 239         if (x == NULL)
 240                 goto end;
 241         fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
 242
 243         csc = X509_STORE_CTX_new();
 244         if (csc == NULL) {
 245                 ERR_print_errors(bio_err);
 246                 goto end;
 247         }
 248         X509_STORE_set_flags(ctx, vflags);
 249         if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
 250                 ERR_print_errors(bio_err);
 251                 goto end;
 252         }
 253         if (tchain)
 254                 X509_STORE_CTX_trusted_stack(csc, tchain);
 255         if (crls)
 256                 X509_STORE_CTX_set0_crls(csc, crls);
 257         i = X509_verify_cert(csc);
 258         X509_STORE_CTX_free(csc);
 259
 260         ret = 0;
 261
 262  end:
 263         if (i > 0) {
 264                 fprintf(stdout, "OK\n");
 265                 ret = 1;
 266         } else
 267                 ERR_print_errors(bio_err);
 268         if (x != NULL)
 269                 X509_free(x);
 270
 271         return (ret);
 272 }
 273
 274 static int
 275 cb(int ok, X509_STORE_CTX * ctx)
 276 {
 277         int cert_error = X509_STORE_CTX_get_error(ctx);
 278         X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
 279
 280         if (!ok) {
 281                 if (current_cert) {
 282                         X509_NAME_print_ex_fp(stdout,
 283                             X509_get_subject_name(current_cert),
 284                             0, XN_FLAG_ONELINE);
 285                         printf("\n");
 286                 }
 287                 printf("%serror %d at %d depth lookup:%s\n",
 288                     X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
 289                     cert_error,
 290                     X509_STORE_CTX_get_error_depth(ctx),
 291                     X509_verify_cert_error_string(cert_error));
 292                 switch (cert_error) {
 293                 case X509_V_ERR_NO_EXPLICIT_POLICY:
 294                         policies_print(NULL, ctx);
 295                 case X509_V_ERR_CERT_HAS_EXPIRED:
 296
 297                         /*
 298                          * since we are just checking the certificates, it is
 299                          * ok if they are self signed. But we should still
 300                          * warn the user.
 301                          */
 302
 303                 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 304                         /* Continue after extension errors too */
 305                 case X509_V_ERR_INVALID_CA:
 306                 case X509_V_ERR_INVALID_NON_CA:
 307                 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 308                 case X509_V_ERR_INVALID_PURPOSE:
 309                 case X509_V_ERR_CRL_HAS_EXPIRED:
 310                 case X509_V_ERR_CRL_NOT_YET_VALID:
 311                 case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
 312                         ok = 1;
 313
 314                 }
 315
 316                 return ok;
 317
 318         }
 319         if (cert_error == X509_V_OK && ok == 2)
 320                 policies_print(NULL, ctx);
 321         if (!v_verbose)
 322                 ERR_clear_error();
 323         return (ok);
 324 }