323 lines
10 KiB
C
323 lines
10 KiB
C
/*
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* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "apps.h"
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#include "progs.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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#include <openssl/pem.h>
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static int cb(int ok, X509_STORE_CTX *ctx);
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static int check(X509_STORE *ctx, const char *file,
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STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
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STACK_OF(X509_CRL) *crls, int show_chain);
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static int v_verbose = 0, vflags = 0;
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_ENGINE, OPT_CAPATH, OPT_CAFILE, OPT_NOCAPATH, OPT_NOCAFILE,
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OPT_UNTRUSTED, OPT_TRUSTED, OPT_CRLFILE, OPT_CRL_DOWNLOAD, OPT_SHOW_CHAIN,
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OPT_V_ENUM, OPT_NAMEOPT,
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OPT_VERBOSE
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} OPTION_CHOICE;
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const OPTIONS verify_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"},
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{OPT_HELP_STR, 1, '-', "Valid options are:\n"},
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{"help", OPT_HELP, '-', "Display this summary"},
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{"verbose", OPT_VERBOSE, '-',
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"Print extra information about the operations being performed."},
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{"CApath", OPT_CAPATH, '/', "A directory of trusted certificates"},
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{"CAfile", OPT_CAFILE, '<', "A file of trusted certificates"},
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{"no-CAfile", OPT_NOCAFILE, '-',
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"Do not load the default certificates file"},
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{"no-CApath", OPT_NOCAPATH, '-',
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"Do not load certificates from the default certificates directory"},
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{"untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates"},
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{"trusted", OPT_TRUSTED, '<', "A file of trusted certificates"},
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{"CRLfile", OPT_CRLFILE, '<',
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"File containing one or more CRL's (in PEM format) to load"},
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{"crl_download", OPT_CRL_DOWNLOAD, '-',
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"Attempt to download CRL information for this certificate"},
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{"show_chain", OPT_SHOW_CHAIN, '-',
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"Display information about the certificate chain"},
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{"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
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OPT_V_OPTIONS,
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#ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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#endif
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{NULL}
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};
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int verify_main(int argc, char **argv)
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{
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ENGINE *e = NULL;
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STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
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STACK_OF(X509_CRL) *crls = NULL;
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X509_STORE *store = NULL;
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X509_VERIFY_PARAM *vpm = NULL;
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const char *prog, *CApath = NULL, *CAfile = NULL;
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int noCApath = 0, noCAfile = 0;
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int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1;
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OPTION_CHOICE o;
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if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
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goto end;
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prog = opt_init(argc, argv, verify_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(verify_options);
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BIO_printf(bio_err, "Recognized usages:\n");
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for (i = 0; i < X509_PURPOSE_get_count(); i++) {
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X509_PURPOSE *ptmp;
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ptmp = X509_PURPOSE_get0(i);
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BIO_printf(bio_err, "\t%-10s\t%s\n",
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X509_PURPOSE_get0_sname(ptmp),
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X509_PURPOSE_get0_name(ptmp));
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}
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BIO_printf(bio_err, "Recognized verify names:\n");
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for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) {
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const X509_VERIFY_PARAM *vptmp;
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vptmp = X509_VERIFY_PARAM_get0(i);
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BIO_printf(bio_err, "\t%-10s\n",
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X509_VERIFY_PARAM_get0_name(vptmp));
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}
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ret = 0;
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goto end;
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case OPT_V_CASES:
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if (!opt_verify(o, vpm))
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goto end;
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vpmtouched++;
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break;
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case OPT_CAPATH:
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CApath = opt_arg();
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break;
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case OPT_CAFILE:
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CAfile = opt_arg();
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break;
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case OPT_NOCAPATH:
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noCApath = 1;
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break;
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case OPT_NOCAFILE:
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noCAfile = 1;
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break;
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case OPT_UNTRUSTED:
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/* Zero or more times */
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if (!load_certs(opt_arg(), &untrusted, FORMAT_PEM, NULL,
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"untrusted certificates"))
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goto end;
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break;
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case OPT_TRUSTED:
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/* Zero or more times */
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noCAfile = 1;
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noCApath = 1;
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if (!load_certs(opt_arg(), &trusted, FORMAT_PEM, NULL,
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"trusted certificates"))
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goto end;
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break;
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case OPT_CRLFILE:
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/* Zero or more times */
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if (!load_crls(opt_arg(), &crls, FORMAT_PEM, NULL,
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"other CRLs"))
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goto end;
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break;
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case OPT_CRL_DOWNLOAD:
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crl_download = 1;
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break;
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case OPT_ENGINE:
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if ((e = setup_engine(opt_arg(), 0)) == NULL) {
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/* Failure message already displayed */
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goto end;
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}
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break;
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case OPT_SHOW_CHAIN:
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show_chain = 1;
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break;
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case OPT_NAMEOPT:
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if (!set_nameopt(opt_arg()))
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goto end;
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break;
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case OPT_VERBOSE:
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v_verbose = 1;
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break;
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}
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}
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argc = opt_num_rest();
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argv = opt_rest();
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if (trusted != NULL && (CAfile || CApath)) {
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BIO_printf(bio_err,
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"%s: Cannot use -trusted with -CAfile or -CApath\n",
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prog);
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goto end;
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}
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if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL)
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goto end;
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X509_STORE_set_verify_cb(store, cb);
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if (vpmtouched)
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X509_STORE_set1_param(store, vpm);
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ERR_clear_error();
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if (crl_download)
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store_setup_crl_download(store);
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ret = 0;
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if (argc < 1) {
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if (check(store, NULL, untrusted, trusted, crls, show_chain) != 1)
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ret = -1;
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} else {
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for (i = 0; i < argc; i++)
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if (check(store, argv[i], untrusted, trusted, crls,
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show_chain) != 1)
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ret = -1;
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}
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end:
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X509_VERIFY_PARAM_free(vpm);
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X509_STORE_free(store);
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sk_X509_pop_free(untrusted, X509_free);
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sk_X509_pop_free(trusted, X509_free);
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sk_X509_CRL_pop_free(crls, X509_CRL_free);
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release_engine(e);
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return (ret < 0 ? 2 : ret);
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}
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static int check(X509_STORE *ctx, const char *file,
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STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
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STACK_OF(X509_CRL) *crls, int show_chain)
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{
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X509 *x = NULL;
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int i = 0, ret = 0;
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X509_STORE_CTX *csc;
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STACK_OF(X509) *chain = NULL;
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int num_untrusted;
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x = load_cert(file, FORMAT_PEM, "certificate file");
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if (x == NULL)
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goto end;
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csc = X509_STORE_CTX_new();
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if (csc == NULL) {
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printf("error %s: X.509 store context allocation failed\n",
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(file == NULL) ? "stdin" : file);
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goto end;
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}
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X509_STORE_set_flags(ctx, vflags);
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if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
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X509_STORE_CTX_free(csc);
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printf("error %s: X.509 store context initialization failed\n",
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(file == NULL) ? "stdin" : file);
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goto end;
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}
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if (tchain != NULL)
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X509_STORE_CTX_set0_trusted_stack(csc, tchain);
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if (crls != NULL)
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X509_STORE_CTX_set0_crls(csc, crls);
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i = X509_verify_cert(csc);
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if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) {
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printf("%s: OK\n", (file == NULL) ? "stdin" : file);
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ret = 1;
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if (show_chain) {
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int j;
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chain = X509_STORE_CTX_get1_chain(csc);
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num_untrusted = X509_STORE_CTX_get_num_untrusted(csc);
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printf("Chain:\n");
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for (j = 0; j < sk_X509_num(chain); j++) {
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X509 *cert = sk_X509_value(chain, j);
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printf("depth=%d: ", j);
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X509_NAME_print_ex_fp(stdout,
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X509_get_subject_name(cert),
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0, get_nameopt());
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if (j < num_untrusted)
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printf(" (untrusted)");
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printf("\n");
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}
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sk_X509_pop_free(chain, X509_free);
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}
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} else {
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printf("error %s: verification failed\n", (file == NULL) ? "stdin" : file);
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}
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X509_STORE_CTX_free(csc);
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end:
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if (i <= 0)
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ERR_print_errors(bio_err);
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X509_free(x);
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return ret;
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}
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static int cb(int ok, X509_STORE_CTX *ctx)
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{
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int cert_error = X509_STORE_CTX_get_error(ctx);
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X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
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if (!ok) {
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if (current_cert != NULL) {
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X509_NAME_print_ex(bio_err,
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X509_get_subject_name(current_cert),
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0, get_nameopt());
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BIO_printf(bio_err, "\n");
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}
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BIO_printf(bio_err, "%serror %d at %d depth lookup: %s\n",
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X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path] " : "",
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cert_error,
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X509_STORE_CTX_get_error_depth(ctx),
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X509_verify_cert_error_string(cert_error));
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/*
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* Pretend that some errors are ok, so they don't stop further
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* processing of the certificate chain. Setting ok = 1 does this.
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* After X509_verify_cert() is done, we verify that there were
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* no actual errors, even if the returned value was positive.
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*/
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switch (cert_error) {
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case X509_V_ERR_NO_EXPLICIT_POLICY:
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policies_print(ctx);
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/* fall thru */
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case X509_V_ERR_CERT_HAS_EXPIRED:
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/* Continue even if the leaf is a self signed cert */
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case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
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/* Continue after extension errors too */
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case X509_V_ERR_INVALID_CA:
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case X509_V_ERR_INVALID_NON_CA:
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case X509_V_ERR_PATH_LENGTH_EXCEEDED:
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case X509_V_ERR_INVALID_PURPOSE:
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case X509_V_ERR_CRL_HAS_EXPIRED:
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case X509_V_ERR_CRL_NOT_YET_VALID:
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case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
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ok = 1;
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}
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return ok;
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}
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if (cert_error == X509_V_OK && ok == 2)
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policies_print(ctx);
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if (!v_verbose)
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ERR_clear_error();
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return ok;
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}
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