Process incoming NewSessionTicket messages on the client side
[openssl.git] / apps / verify.c
index 00242fb5ebe21e079cf09e98dbabdccac5d4f604..bd8349a508f16a68d33d1fb1cba910c4fa1951ab 100644 (file)
@@ -1,59 +1,10 @@
-/* apps/verify.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
  *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- * 
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * 
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
  */
 
 #include <stdio.h>
 #include <openssl/x509v3.h>
 #include <openssl/pem.h>
 
-#undef PROG
-#define PROG   verify_main
-
-static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
-static int check(X509_STORE *ctx, char *file,
-               STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
-               STACK_OF(X509_CRL) *crls, ENGINE *e);
-static int v_verbose=0, vflags = 0;
-
-int MAIN(int, char **);
-
-int MAIN(int argc, char **argv)
-       {
-       ENGINE *e = NULL;
-       int i,ret=1, badarg = 0;
-       char *CApath=NULL,*CAfile=NULL;
-       char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
-       STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
-       STACK_OF(X509_CRL) *crls = NULL;
-       X509_STORE *cert_ctx=NULL;
-       X509_LOOKUP *lookup=NULL;
-       X509_VERIFY_PARAM *vpm = NULL;
-#ifndef OPENSSL_NO_ENGINE
-       char *engine=NULL;
-#endif
-
-       cert_ctx=X509_STORE_new();
-       if (cert_ctx == NULL) goto end;
-       X509_STORE_set_verify_cb(cert_ctx,cb);
-
-       ERR_load_crypto_strings();
-
-       apps_startup();
-
-       if (bio_err == NULL)
-               if ((bio_err=BIO_new(BIO_s_file())) != NULL)
-                       BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
-
-       if (!load_config(bio_err, NULL))
-               goto end;
-
-       argc--;
-       argv++;
-       for (;;)
-               {
-               if (argc >= 1)
-                       {
-                       if (strcmp(*argv,"-CApath") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               CApath= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-CAfile") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               CAfile= *(++argv);
-                               }
-                       else if (args_verify(&argv, &argc, &badarg, bio_err,
-                                                                       &vpm))
-                               {
-                               if (badarg)
-                                       goto end;
-                               continue;
-                               }
-                       else if (strcmp(*argv,"-untrusted") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               untfile= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-trusted") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               trustfile= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-CRLfile") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               crlfile= *(++argv);
-                               }
+static int cb(int ok, X509_STORE_CTX *ctx);
+static int check(X509_STORE *ctx, const char *file,
+                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
+                 STACK_OF(X509_CRL) *crls, int show_chain);
+static int v_verbose = 0, vflags = 0;
+
+typedef enum OPTION_choice {
+    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+    OPT_ENGINE, OPT_CAPATH, OPT_CAFILE, OPT_NOCAPATH, OPT_NOCAFILE,
+    OPT_UNTRUSTED, OPT_TRUSTED, OPT_CRLFILE, OPT_CRL_DOWNLOAD, OPT_SHOW_CHAIN,
+    OPT_V_ENUM,
+    OPT_VERBOSE
+} OPTION_CHOICE;
+
+const OPTIONS verify_options[] = {
+    {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"},
+    {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
+    {"help", OPT_HELP, '-', "Display this summary"},
+    {"verbose", OPT_VERBOSE, '-',
+        "Print extra information about the operations being performed."},
+    {"CApath", OPT_CAPATH, '/', "A directory of trusted certificates"},
+    {"CAfile", OPT_CAFILE, '<', "A file of trusted certificates"},
+    {"no-CAfile", OPT_NOCAFILE, '-',
+     "Do not load the default certificates file"},
+    {"no-CApath", OPT_NOCAPATH, '-',
+     "Do not load certificates from the default certificates directory"},
+    {"untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates"},
+    {"trusted", OPT_TRUSTED, '<', "A file of trusted certificates"},
+    {"CRLfile", OPT_CRLFILE, '<',
+        "File containing one or more CRL's (in PEM format) to load"},
+    {"crl_download", OPT_CRL_DOWNLOAD, '-',
+        "Attempt to download CRL information for this certificate"},
+    {"show_chain", OPT_SHOW_CHAIN, '-',
+        "Display information about the certificate chain"},
+    OPT_V_OPTIONS,
 #ifndef OPENSSL_NO_ENGINE
-                       else if (strcmp(*argv,"-engine") == 0)
-                               {
-                               if (--argc < 1) goto end;
-                               engine= *(++argv);
-                               }
+    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 #endif
-                       else if (strcmp(*argv,"-help") == 0)
-                               goto end;
-                       else if (strcmp(*argv,"-verbose") == 0)
-                               v_verbose=1;
-                       else if (argv[0][0] == '-')
-                               goto end;
-                       else
-                               break;
-                       argc--;
-                       argv++;
-                       }
-               else
-                       break;
-               }
-
-#ifndef OPENSSL_NO_ENGINE
-        e = setup_engine(bio_err, engine, 0);
-#endif
-
-       if (vpm)
-               X509_STORE_set1_param(cert_ctx, vpm);
-
-       lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
-       if (lookup == NULL) abort();
-       if (CAfile) {
-               i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
-               if(!i) {
-                       BIO_printf(bio_err, "Error loading file %s\n", CAfile);
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
-               
-       lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
-       if (lookup == NULL) abort();
-       if (CApath) {
-               i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
-               if(!i) {
-                       BIO_printf(bio_err, "Error loading directory %s\n", CApath);
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
-
-       ERR_clear_error();
-
-       if(untfile)
-               {
-               untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
-                                       NULL, e, "untrusted certificates");
-               if(!untrusted)
-                       goto end;
-               }
-
-       if(trustfile)
-               {
-               trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
-                                       NULL, e, "trusted certificates");
-               if(!trusted)
-                       goto end;
-               }
-
-       if(crlfile)
-               {
-               crls = load_crls(bio_err, crlfile, FORMAT_PEM,
-                                       NULL, e, "other CRLs");
-               if(!crls)
-                       goto end;
-               }
-
-       if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, crls, e);
-       else
-               for (i=0; i<argc; i++)
-                       check(cert_ctx,argv[i], untrusted, trusted, crls, e);
-       ret=0;
-end:
-       if (ret == 1) {
-               BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
-#ifndef OPENSSL_NO_ENGINE
-               BIO_printf(bio_err," [-engine e]");
-#endif
-               BIO_printf(bio_err," cert1 cert2 ...\n");
-
-               BIO_printf(bio_err,"recognized usages:\n");
-               for(i = 0; i < X509_PURPOSE_get_count(); i++)
-                       {
-                       X509_PURPOSE *ptmp;
-                       ptmp = X509_PURPOSE_get0(i);
-                       BIO_printf(bio_err, "\t%-10s\t%s\n",
-                                       X509_PURPOSE_get0_sname(ptmp),
-                                       X509_PURPOSE_get0_name(ptmp));
-                       }
-
-               BIO_printf(bio_err,"recognized verify names:\n");
-               for(i = 0; i < X509_VERIFY_PARAM_get_count(); i++)
-                       {
-                       const X509_VERIFY_PARAM *vptmp;
-                       vptmp = X509_VERIFY_PARAM_get0(i);
-                       BIO_printf(bio_err, "\t%-10s\n",
-                                       X509_VERIFY_PARAM_get0_name(vptmp));
-                       }
-
-       }
-       if (vpm) X509_VERIFY_PARAM_free(vpm);
-       if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
-       sk_X509_pop_free(untrusted, X509_free);
-       sk_X509_pop_free(trusted, X509_free);
-       sk_X509_CRL_pop_free(crls, X509_CRL_free);
-       apps_shutdown();
-       OPENSSL_EXIT(ret);
-       }
-
-static int check(X509_STORE *ctx, char *file,
-               STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
-               STACK_OF(X509_CRL) *crls, ENGINE *e)
-       {
-       X509 *x=NULL;
-       int i=0,ret=0;
-       X509_STORE_CTX *csc;
-
-       x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
-       if (x == NULL)
-               goto end;
-       fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
-
-       csc = X509_STORE_CTX_new();
-       if (csc == NULL)
-               {
-               ERR_print_errors(bio_err);
-               goto end;
-               }
-       X509_STORE_set_flags(ctx, vflags);
-       if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
-               {
-               ERR_print_errors(bio_err);
-               goto end;
-               }
-       if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
-       if (crls)
-               X509_STORE_CTX_set0_crls(csc, crls);
-       i=X509_verify_cert(csc);
-       X509_STORE_CTX_free(csc);
-
-       ret=0;
-end:
-       if (i > 0)
-               {
-               fprintf(stdout,"OK\n");
-               ret=1;
-               }
-       else
-               ERR_print_errors(bio_err);
-       if (x != NULL) X509_free(x);
-
-       return(ret);
-       }
-
-static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
-       {
-       int cert_error = X509_STORE_CTX_get_error(ctx);
-       X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
-
-       if (!ok)
-               {
-               if (current_cert)
-                       {
-                       X509_NAME_print_ex_fp(stdout,
-                               X509_get_subject_name(current_cert),
-                               0, XN_FLAG_ONELINE);
-                       printf("\n");
-                       }
-               printf("%serror %d at %d depth lookup:%s\n",
-                       X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
-                       cert_error,
-                       X509_STORE_CTX_get_error_depth(ctx),
-                       X509_verify_cert_error_string(cert_error));
-               switch(cert_error)
-                       {
-                       case X509_V_ERR_NO_EXPLICIT_POLICY:
-                               policies_print(NULL, ctx);
-                       case X509_V_ERR_CERT_HAS_EXPIRED:
-
-                       /* since we are just checking the certificates, it is
-                        * ok if they are self signed. But we should still warn
-                        * the user.
-                        */
-
-                       case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
-                       /* Continue after extension errors too */
-                       case X509_V_ERR_INVALID_CA:
-                       case X509_V_ERR_INVALID_NON_CA:
-                       case X509_V_ERR_PATH_LENGTH_EXCEEDED:
-                       case X509_V_ERR_INVALID_PURPOSE:
-                       case X509_V_ERR_CRL_HAS_EXPIRED:
-                       case X509_V_ERR_CRL_NOT_YET_VALID:
-                       case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
-                       ok = 1;
-
-                       case X509_V_ERR_KEYUSAGE_NO_CERTSIGN:
-                       ok = 1;
-
-                       }
-
-               return ok;
-
-               }
-       if (cert_error == X509_V_OK && ok == 2)
-               policies_print(NULL, ctx);
-       if (!v_verbose)
-               ERR_clear_error();
-       return(ok);
-       }
+    {NULL}
+};
+
+int verify_main(int argc, char **argv)
+{
+    ENGINE *e = NULL;
+    STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
+    STACK_OF(X509_CRL) *crls = NULL;
+    X509_STORE *store = NULL;
+    X509_VERIFY_PARAM *vpm = NULL;
+    const char *prog, *CApath = NULL, *CAfile = NULL;
+    int noCApath = 0, noCAfile = 0;
+    int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1;
+    OPTION_CHOICE o;
+
+    if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
+        goto end;
+
+    prog = opt_init(argc, argv, verify_options);
+    while ((o = opt_next()) != OPT_EOF) {
+        switch (o) {
+        case OPT_EOF:
+        case OPT_ERR:
+            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
+            goto end;
+        case OPT_HELP:
+            opt_help(verify_options);
+            BIO_printf(bio_err, "Recognized usages:\n");
+            for (i = 0; i < X509_PURPOSE_get_count(); i++) {
+                X509_PURPOSE *ptmp;
+                ptmp = X509_PURPOSE_get0(i);
+                BIO_printf(bio_err, "\t%-10s\t%s\n",
+                        X509_PURPOSE_get0_sname(ptmp),
+                        X509_PURPOSE_get0_name(ptmp));
+            }
+
+            BIO_printf(bio_err, "Recognized verify names:\n");
+            for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) {
+                const X509_VERIFY_PARAM *vptmp;
+                vptmp = X509_VERIFY_PARAM_get0(i);
+                BIO_printf(bio_err, "\t%-10s\n",
+                        X509_VERIFY_PARAM_get0_name(vptmp));
+            }
+            ret = 0;
+            goto end;
+        case OPT_V_CASES:
+            if (!opt_verify(o, vpm))
+                goto end;
+            vpmtouched++;
+            break;
+        case OPT_CAPATH:
+            CApath = opt_arg();
+            break;
+        case OPT_CAFILE:
+            CAfile = opt_arg();
+            break;
+        case OPT_NOCAPATH:
+            noCApath = 1;
+            break;
+        case OPT_NOCAFILE:
+            noCAfile = 1;
+            break;
+        case OPT_UNTRUSTED:
+            /* Zero or more times */
+            if (!load_certs(opt_arg(), &untrusted, FORMAT_PEM, NULL,
+                            "untrusted certificates"))
+                goto end;
+            break;
+        case OPT_TRUSTED:
+            /* Zero or more times */
+            noCAfile = 1;
+            noCApath = 1;
+            if (!load_certs(opt_arg(), &trusted, FORMAT_PEM, NULL,
+                            "trusted certificates"))
+                goto end;
+            break;
+        case OPT_CRLFILE:
+            /* Zero or more times */
+            if (!load_crls(opt_arg(), &crls, FORMAT_PEM, NULL,
+                           "other CRLs"))
+                goto end;
+            break;
+        case OPT_CRL_DOWNLOAD:
+            crl_download = 1;
+            break;
+        case OPT_ENGINE:
+            if ((e = setup_engine(opt_arg(), 0)) == NULL) {
+                /* Failure message already displayed */
+                goto end;
+            }
+            break;
+        case OPT_SHOW_CHAIN:
+            show_chain = 1;
+            break;
+        case OPT_VERBOSE:
+            v_verbose = 1;
+            break;
+        }
+    }
+    argc = opt_num_rest();
+    argv = opt_rest();
+    if (trusted != NULL && (CAfile || CApath)) {
+        BIO_printf(bio_err,
+                   "%s: Cannot use -trusted with -CAfile or -CApath\n",
+                   prog);
+        goto end;
+    }
+
+    if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL)
+        goto end;
+    X509_STORE_set_verify_cb(store, cb);
+
+    if (vpmtouched)
+        X509_STORE_set1_param(store, vpm);
+
+    ERR_clear_error();
+
+    if (crl_download)
+        store_setup_crl_download(store);
+
+    ret = 0;
+    if (argc < 1) {
+        if (check(store, NULL, untrusted, trusted, crls, show_chain) != 1)
+            ret = -1;
+    } else {
+        for (i = 0; i < argc; i++)
+            if (check(store, argv[i], untrusted, trusted, crls,
+                      show_chain) != 1)
+                ret = -1;
+    }
+
+ end:
+    X509_VERIFY_PARAM_free(vpm);
+    X509_STORE_free(store);
+    sk_X509_pop_free(untrusted, X509_free);
+    sk_X509_pop_free(trusted, X509_free);
+    sk_X509_CRL_pop_free(crls, X509_CRL_free);
+    release_engine(e);
+    return (ret < 0 ? 2 : ret);
+}
+
+static int check(X509_STORE *ctx, const char *file,
+                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
+                 STACK_OF(X509_CRL) *crls, int show_chain)
+{
+    X509 *x = NULL;
+    int i = 0, ret = 0;
+    X509_STORE_CTX *csc;
+    STACK_OF(X509) *chain = NULL;
+    int num_untrusted;
+
+    x = load_cert(file, FORMAT_PEM, "certificate file");
+    if (x == NULL)
+        goto end;
+
+    csc = X509_STORE_CTX_new();
+    if (csc == NULL) {
+        printf("error %s: X.509 store context allocation failed\n",
+               (file == NULL) ? "stdin" : file);
+        goto end;
+    }
+
+    X509_STORE_set_flags(ctx, vflags);
+    if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
+        printf("error %s: X.509 store context initialization failed\n",
+               (file == NULL) ? "stdin" : file);
+        goto end;
+    }
+    if (tchain)
+        X509_STORE_CTX_set0_trusted_stack(csc, tchain);
+    if (crls)
+        X509_STORE_CTX_set0_crls(csc, crls);
+    i = X509_verify_cert(csc);
+    if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) {
+        printf("%s: OK\n", (file == NULL) ? "stdin" : file);
+        ret = 1;
+        if (show_chain) {
+            int j;
+
+            chain = X509_STORE_CTX_get1_chain(csc);
+            num_untrusted = X509_STORE_CTX_get_num_untrusted(csc);
+            printf("Chain:\n");
+            for (j = 0; j < sk_X509_num(chain); j++) {
+                X509 *cert = sk_X509_value(chain, j);
+                printf("depth=%d: ", j);
+                X509_NAME_print_ex_fp(stdout,
+                                      X509_get_subject_name(cert),
+                                      0, XN_FLAG_ONELINE);
+                if (j < num_untrusted)
+                    printf(" (untrusted)");
+                printf("\n");
+            }
+            sk_X509_pop_free(chain, X509_free);
+        }
+    } else {
+        printf("error %s: verification failed\n", (file == NULL) ? "stdin" : file);
+    }
+    X509_STORE_CTX_free(csc);
+
+ end:
+    if (i <= 0)
+        ERR_print_errors(bio_err);
+    X509_free(x);
+
+    return ret;
+}
+
+static int cb(int ok, X509_STORE_CTX *ctx)
+{
+    int cert_error = X509_STORE_CTX_get_error(ctx);
+    X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
+
+    if (!ok) {
+        if (current_cert) {
+            X509_NAME_print_ex(bio_err,
+                            X509_get_subject_name(current_cert),
+                            0, XN_FLAG_ONELINE);
+            BIO_printf(bio_err, "\n");
+        }
+        BIO_printf(bio_err, "%serror %d at %d depth lookup: %s\n",
+               X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path] " : "",
+               cert_error,
+               X509_STORE_CTX_get_error_depth(ctx),
+               X509_verify_cert_error_string(cert_error));
+        switch (cert_error) {
+        case X509_V_ERR_NO_EXPLICIT_POLICY:
+            policies_print(ctx);
+        case X509_V_ERR_CERT_HAS_EXPIRED:
+
+            /*
+             * since we are just checking the certificates, it is ok if they
+             * are self signed. But we should still warn the user.
+             */
+        case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
+            /* Continue after extension errors too */
+        case X509_V_ERR_INVALID_CA:
+        case X509_V_ERR_INVALID_NON_CA:
+        case X509_V_ERR_PATH_LENGTH_EXCEEDED:
+        case X509_V_ERR_INVALID_PURPOSE:
+        case X509_V_ERR_CRL_HAS_EXPIRED:
+        case X509_V_ERR_CRL_NOT_YET_VALID:
+        case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
+            ok = 1;
+        }
+
+        return ok;
+
+    }
+    if (cert_error == X509_V_OK && ok == 2)
+        policies_print(ctx);
+    if (!v_verbose)
+        ERR_clear_error();
+    return (ok);
+}