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,
  74                  STACK_OF(X509) *tchain, int purpose, ENGINE *e);
  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, badarg = 0;
  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     X509_VERIFY_PARAM *vpm = NULL;
  91 #ifndef OPENSSL_NO_ENGINE
  92     char *engine = NULL;
  93 #endif
  94
  95     cert_ctx = X509_STORE_new();
  96     if (cert_ctx == NULL)
  97         goto end;
  98     X509_STORE_set_verify_cb_func(cert_ctx, cb);
  99
 100     ERR_load_crypto_strings();
 101
 102     apps_startup();
 103
 104     if (bio_err == NULL)
 105         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 106             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
 107
 108     if (!load_config(bio_err, NULL))
 109         goto end;
 110
 111     argc--;
 112     argv++;
 113     for (;;) {
 114         if (argc >= 1) {
 115             if (strcmp(*argv, "-CApath") == 0) {
 116                 if (argc-- < 1)
 117                     goto end;
 118                 CApath = *(++argv);
 119             } else if (strcmp(*argv, "-CAfile") == 0) {
 120                 if (argc-- < 1)
 121                     goto end;
 122                 CAfile = *(++argv);
 123             } else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm)) {
 124                 if (badarg)
 125                     goto end;
 126                 continue;
 127             } else if (strcmp(*argv, "-untrusted") == 0) {
 128                 if (argc-- < 1)
 129                     goto end;
 130                 untfile = *(++argv);
 131             } else if (strcmp(*argv, "-trusted") == 0) {
 132                 if (argc-- < 1)
 133                     goto end;
 134                 trustfile = *(++argv);
 135             }
 136 #ifndef OPENSSL_NO_ENGINE
 137             else if (strcmp(*argv, "-engine") == 0) {
 138                 if (--argc < 1)
 139                     goto end;
 140                 engine = *(++argv);
 141             }
 142 #endif
 143             else if (strcmp(*argv, "-help") == 0)
 144                 goto end;
 145             else if (strcmp(*argv, "-verbose") == 0)
 146                 v_verbose = 1;
 147             else if (argv[0][0] == '-')
 148                 goto end;
 149             else
 150                 break;
 151             argc--;
 152             argv++;
 153         } else
 154             break;
 155     }
 156
 157 #ifndef OPENSSL_NO_ENGINE
 158     e = setup_engine(bio_err, engine, 0);
 159 #endif
 160
 161     if (vpm)
 162         X509_STORE_set1_param(cert_ctx, vpm);
 163
 164     lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 165     if (lookup == NULL)
 166         abort();
 167     if (CAfile) {
 168         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
 169         if (!i) {
 170             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 171             ERR_print_errors(bio_err);
 172             goto end;
 173         }
 174     } else
 175         X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
 176
 177     lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 178     if (lookup == NULL)
 179         abort();
 180     if (CApath) {
 181         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
 182         if (!i) {
 183             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 184             ERR_print_errors(bio_err);
 185             goto end;
 186         }
 187     } else
 188         X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
 189
 190     ERR_clear_error();
 191
 192     if (untfile) {
 193         if (!(untrusted = load_untrusted(untfile))) {
 194             BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
 195             ERR_print_errors(bio_err);
 196             goto end;
 197         }
 198     }
 199
 200     if (trustfile) {
 201         if (!(trusted = load_untrusted(trustfile))) {
 202             BIO_printf(bio_err, "Error loading untrusted file %s\n",
 203                        trustfile);
 204             ERR_print_errors(bio_err);
 205             goto end;
 206         }
 207     }
 208
 209     if (argc < 1)
 210         check(cert_ctx, NULL, untrusted, trusted, purpose, e);
 211     else
 212         for (i = 0; i < argc; i++)
 213             check(cert_ctx, argv[i], untrusted, trusted, purpose, e);
 214     ret = 0;
 215  end:
 216     if (ret == 1) {
 217         BIO_printf(bio_err,
 218                    "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
 219 #ifndef OPENSSL_NO_ENGINE
 220         BIO_printf(bio_err, " [-engine e]");
 221 #endif
 222         BIO_printf(bio_err, " cert1 cert2 ...\n");
 223         BIO_printf(bio_err, "recognized usages:\n");
 224         for (i = 0; i < X509_PURPOSE_get_count(); i++) {
 225             X509_PURPOSE *ptmp;
 226             ptmp = X509_PURPOSE_get0(i);
 227             BIO_printf(bio_err, "\t%-10s\t%s\n",
 228                        X509_PURPOSE_get0_sname(ptmp),
 229                        X509_PURPOSE_get0_name(ptmp));
 230         }
 231     }
 232     if (vpm)
 233         X509_VERIFY_PARAM_free(vpm);
 234     if (cert_ctx != NULL)
 235         X509_STORE_free(cert_ctx);
 236     sk_X509_pop_free(untrusted, X509_free);
 237     sk_X509_pop_free(trusted, X509_free);
 238     apps_shutdown();
 239     OPENSSL_EXIT(ret);
 240 }
 241
 242 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
 243                  STACK_OF(X509) *tchain, int purpose, ENGINE *e)
 244 {
 245     X509 *x = NULL;
 246     int i = 0, ret = 0;
 247     X509_STORE_CTX *csc;
 248
 249     x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
 250     if (x == NULL)
 251         goto end;
 252     fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
 253
 254     csc = X509_STORE_CTX_new();
 255     if (csc == NULL) {
 256         ERR_print_errors(bio_err);
 257         goto end;
 258     }
 259     X509_STORE_set_flags(ctx, vflags);
 260     if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
 261         ERR_print_errors(bio_err);
 262         goto end;
 263     }
 264     if (tchain)
 265         X509_STORE_CTX_trusted_stack(csc, tchain);
 266     if (purpose >= 0)
 267         X509_STORE_CTX_set_purpose(csc, purpose);
 268     i = X509_verify_cert(csc);
 269     X509_STORE_CTX_free(csc);
 270
 271     ret = 0;
 272  end:
 273     if (i > 0) {
 274         fprintf(stdout, "OK\n");
 275         ret = 1;
 276     } else
 277         ERR_print_errors(bio_err);
 278     if (x != NULL)
 279         X509_free(x);
 280
 281     return (ret);
 282 }
 283
 284 static STACK_OF(X509) *load_untrusted(char *certfile)
 285 {
 286     STACK_OF(X509_INFO) *sk = NULL;
 287     STACK_OF(X509) *stack = NULL, *ret = NULL;
 288     BIO *in = NULL;
 289     X509_INFO *xi;
 290
 291     if (!(stack = sk_X509_new_null())) {
 292         BIO_printf(bio_err, "memory allocation failure\n");
 293         goto end;
 294     }
 295
 296     if (!(in = BIO_new_file(certfile, "r"))) {
 297         BIO_printf(bio_err, "error opening the file, %s\n", certfile);
 298         goto end;
 299     }
 300
 301     /* This loads from a file, a stack of x509/crl/pkey sets */
 302     if (!(sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL))) {
 303         BIO_printf(bio_err, "error reading the file, %s\n", certfile);
 304         goto end;
 305     }
 306
 307     /* scan over it and pull out the certs */
 308     while (sk_X509_INFO_num(sk)) {
 309         xi = sk_X509_INFO_shift(sk);
 310         if (xi->x509 != NULL) {
 311             sk_X509_push(stack, xi->x509);
 312             xi->x509 = NULL;
 313         }
 314         X509_INFO_free(xi);
 315     }
 316     if (!sk_X509_num(stack)) {
 317         BIO_printf(bio_err, "no certificates in file, %s\n", certfile);
 318         sk_X509_free(stack);
 319         goto end;
 320     }
 321     ret = stack;
 322  end:
 323     BIO_free(in);
 324     sk_X509_INFO_free(sk);
 325     return (ret);
 326 }
 327
 328 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
 329 {
 330     char buf[256];
 331
 332     if (!ok) {
 333         if (ctx->current_cert) {
 334             X509_NAME_oneline(X509_get_subject_name(ctx->current_cert), buf,
 335                               sizeof buf);
 336             printf("%s\n", buf);
 337         }
 338         printf("error %d at %d depth lookup:%s\n", ctx->error,
 339                ctx->error_depth, X509_verify_cert_error_string(ctx->error));
 340         if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED)
 341             ok = 1;
 342         /*
 343          * since we are just checking the certificates, it is ok if they are
 344          * self signed. But we should still warn the user.
 345          */
 346         if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
 347             ok = 1;
 348         /* Continue after extension errors too */
 349         if (ctx->error == X509_V_ERR_INVALID_CA)
 350             ok = 1;
 351         if (ctx->error == X509_V_ERR_INVALID_NON_CA)
 352             ok = 1;
 353         if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED)
 354             ok = 1;
 355         if (ctx->error == X509_V_ERR_INVALID_PURPOSE)
 356             ok = 1;
 357         if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
 358             ok = 1;
 359         if (ctx->error == X509_V_ERR_CRL_HAS_EXPIRED)
 360             ok = 1;
 361         if (ctx->error == X509_V_ERR_CRL_NOT_YET_VALID)
 362             ok = 1;
 363         if (ctx->error == X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION)
 364             ok = 1;
 365
 366         if (ctx->error == X509_V_ERR_NO_EXPLICIT_POLICY)
 367             policies_print(NULL, ctx);
 368         return ok;
 369
 370     }
 371     if ((ctx->error == X509_V_OK) && (ok == 2))
 372         policies_print(NULL, ctx);
 373     if (!v_verbose)
 374         ERR_clear_error();
 375     return (ok);
 376 }