[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <stdlib.h>
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| 12 | #include <string.h>
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| 13 | #include "apps.h"
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| 14 | #include <openssl/bio.h>
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| 15 | #include <openssl/err.h>
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| 16 | #include <openssl/x509.h>
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| 17 | #include <openssl/x509v3.h>
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| 18 | #include <openssl/pem.h>
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| 19 |
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| 20 | static int cb(int ok, X509_STORE_CTX *ctx);
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| 21 | static int check(X509_STORE *ctx, const char *file,
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| 22 | STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
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| 23 | STACK_OF(X509_CRL) *crls, int show_chain);
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| 24 | static int v_verbose = 0, vflags = 0;
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| 25 |
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| 26 | typedef enum OPTION_choice {
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| 27 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 28 | OPT_ENGINE, OPT_CAPATH, OPT_CAFILE, OPT_NOCAPATH, OPT_NOCAFILE,
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| 29 | OPT_UNTRUSTED, OPT_TRUSTED, OPT_CRLFILE, OPT_CRL_DOWNLOAD, OPT_SHOW_CHAIN,
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| 30 | OPT_V_ENUM,
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| 31 | OPT_VERBOSE
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| 32 | } OPTION_CHOICE;
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| 33 |
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| 34 | OPTIONS verify_options[] = {
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| 35 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"},
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| 36 | {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
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| 37 | {"help", OPT_HELP, '-', "Display this summary"},
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| 38 | {"verbose", OPT_VERBOSE, '-',
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| 39 | "Print extra information about the operations being performed."},
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| 40 | {"CApath", OPT_CAPATH, '/', "A directory of trusted certificates"},
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| 41 | {"CAfile", OPT_CAFILE, '<', "A file of trusted certificates"},
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| 42 | {"no-CAfile", OPT_NOCAFILE, '-',
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| 43 | "Do not load the default certificates file"},
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| 44 | {"no-CApath", OPT_NOCAPATH, '-',
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| 45 | "Do not load certificates from the default certificates directory"},
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| 46 | {"untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates"},
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| 47 | {"trusted", OPT_TRUSTED, '<', "A file of trusted certificates"},
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| 48 | {"CRLfile", OPT_CRLFILE, '<',
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| 49 | "File containing one or more CRL's (in PEM format) to load"},
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| 50 | {"crl_download", OPT_CRL_DOWNLOAD, '-',
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| 51 | "Attempt to download CRL information for this certificate"},
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| 52 | {"show_chain", OPT_SHOW_CHAIN, '-',
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| 53 | "Display information about the certificate chain"},
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| 54 | OPT_V_OPTIONS,
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| 55 | #ifndef OPENSSL_NO_ENGINE
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| 56 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 57 | #endif
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| 58 | {NULL}
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| 59 | };
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| 60 |
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| 61 | int verify_main(int argc, char **argv)
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| 62 | {
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| 63 | ENGINE *e = NULL;
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| 64 | STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
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| 65 | STACK_OF(X509_CRL) *crls = NULL;
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| 66 | X509_STORE *store = NULL;
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| 67 | X509_VERIFY_PARAM *vpm = NULL;
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| 68 | const char *prog, *CApath = NULL, *CAfile = NULL;
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| 69 | int noCApath = 0, noCAfile = 0;
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| 70 | int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1;
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| 71 | OPTION_CHOICE o;
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| 72 |
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| 73 | if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
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| 74 | goto end;
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| 75 |
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| 76 | prog = opt_init(argc, argv, verify_options);
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| 77 | while ((o = opt_next()) != OPT_EOF) {
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| 78 | switch (o) {
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| 79 | case OPT_EOF:
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| 80 | case OPT_ERR:
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| 81 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 82 | goto end;
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| 83 | case OPT_HELP:
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| 84 | opt_help(verify_options);
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| 85 | BIO_printf(bio_err, "Recognized usages:\n");
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| 86 | for (i = 0; i < X509_PURPOSE_get_count(); i++) {
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| 87 | X509_PURPOSE *ptmp;
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| 88 | ptmp = X509_PURPOSE_get0(i);
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| 89 | BIO_printf(bio_err, "\t%-10s\t%s\n",
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| 90 | X509_PURPOSE_get0_sname(ptmp),
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| 91 | X509_PURPOSE_get0_name(ptmp));
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| 92 | }
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| 93 |
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| 94 | BIO_printf(bio_err, "Recognized verify names:\n");
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| 95 | for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) {
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| 96 | const X509_VERIFY_PARAM *vptmp;
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| 97 | vptmp = X509_VERIFY_PARAM_get0(i);
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| 98 | BIO_printf(bio_err, "\t%-10s\n",
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| 99 | X509_VERIFY_PARAM_get0_name(vptmp));
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| 100 | }
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| 101 | ret = 0;
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| 102 | goto end;
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| 103 | case OPT_V_CASES:
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| 104 | if (!opt_verify(o, vpm))
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| 105 | goto end;
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| 106 | vpmtouched++;
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| 107 | break;
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| 108 | case OPT_CAPATH:
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| 109 | CApath = opt_arg();
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| 110 | break;
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| 111 | case OPT_CAFILE:
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| 112 | CAfile = opt_arg();
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| 113 | break;
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| 114 | case OPT_NOCAPATH:
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| 115 | noCApath = 1;
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| 116 | break;
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| 117 | case OPT_NOCAFILE:
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| 118 | noCAfile = 1;
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| 119 | break;
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| 120 | case OPT_UNTRUSTED:
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| 121 | /* Zero or more times */
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| 122 | if (!load_certs(opt_arg(), &untrusted, FORMAT_PEM, NULL,
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| 123 | "untrusted certificates"))
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| 124 | goto end;
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| 125 | break;
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| 126 | case OPT_TRUSTED:
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| 127 | /* Zero or more times */
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| 128 | noCAfile = 1;
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| 129 | noCApath = 1;
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| 130 | if (!load_certs(opt_arg(), &trusted, FORMAT_PEM, NULL,
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| 131 | "trusted certificates"))
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| 132 | goto end;
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| 133 | break;
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| 134 | case OPT_CRLFILE:
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| 135 | /* Zero or more times */
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| 136 | if (!load_crls(opt_arg(), &crls, FORMAT_PEM, NULL,
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| 137 | "other CRLs"))
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| 138 | goto end;
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| 139 | break;
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| 140 | case OPT_CRL_DOWNLOAD:
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| 141 | crl_download = 1;
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| 142 | break;
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| 143 | case OPT_ENGINE:
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| 144 | if ((e = setup_engine(opt_arg(), 0)) == NULL) {
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| 145 | /* Failure message already displayed */
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| 146 | goto end;
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| 147 | }
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| 148 | break;
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| 149 | case OPT_SHOW_CHAIN:
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| 150 | show_chain = 1;
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| 151 | break;
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| 152 | case OPT_VERBOSE:
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| 153 | v_verbose = 1;
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| 154 | break;
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| 155 | }
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| 156 | }
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| 157 | argc = opt_num_rest();
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| 158 | argv = opt_rest();
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| 159 | if (trusted != NULL && (CAfile || CApath)) {
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| 160 | BIO_printf(bio_err,
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| 161 | "%s: Cannot use -trusted with -CAfile or -CApath\n",
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| 162 | prog);
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| 163 | goto end;
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| 164 | }
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| 165 |
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| 166 | if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL)
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| 167 | goto end;
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| 168 | X509_STORE_set_verify_cb(store, cb);
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| 169 |
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| 170 | if (vpmtouched)
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| 171 | X509_STORE_set1_param(store, vpm);
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| 172 |
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| 173 | ERR_clear_error();
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| 174 |
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| 175 | if (crl_download)
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| 176 | store_setup_crl_download(store);
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| 177 |
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| 178 | ret = 0;
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| 179 | if (argc < 1) {
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| 180 | if (check(store, NULL, untrusted, trusted, crls, show_chain) != 1)
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| 181 | ret = -1;
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| 182 | } else {
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| 183 | for (i = 0; i < argc; i++)
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| 184 | if (check(store, argv[i], untrusted, trusted, crls,
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| 185 | show_chain) != 1)
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| 186 | ret = -1;
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| 187 | }
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| 188 |
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| 189 | end:
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| 190 | X509_VERIFY_PARAM_free(vpm);
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| 191 | X509_STORE_free(store);
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| 192 | sk_X509_pop_free(untrusted, X509_free);
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| 193 | sk_X509_pop_free(trusted, X509_free);
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| 194 | sk_X509_CRL_pop_free(crls, X509_CRL_free);
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| 195 | release_engine(e);
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| 196 | return (ret < 0 ? 2 : ret);
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| 197 | }
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| 198 |
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| 199 | static int check(X509_STORE *ctx, const char *file,
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| 200 | STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
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| 201 | STACK_OF(X509_CRL) *crls, int show_chain)
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| 202 | {
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| 203 | X509 *x = NULL;
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| 204 | int i = 0, ret = 0;
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| 205 | X509_STORE_CTX *csc;
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| 206 | STACK_OF(X509) *chain = NULL;
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| 207 | int num_untrusted;
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| 208 |
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| 209 | x = load_cert(file, FORMAT_PEM, "certificate file");
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| 210 | if (x == NULL)
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| 211 | goto end;
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| 212 |
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| 213 | csc = X509_STORE_CTX_new();
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| 214 | if (csc == NULL) {
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| 215 | printf("error %s: X.509 store context allocation failed\n",
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| 216 | (file == NULL) ? "stdin" : file);
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| 217 | goto end;
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| 218 | }
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| 219 |
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| 220 | X509_STORE_set_flags(ctx, vflags);
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| 221 | if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
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| 222 | printf("error %s: X.509 store context initialization failed\n",
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| 223 | (file == NULL) ? "stdin" : file);
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| 224 | goto end;
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| 225 | }
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| 226 | if (tchain)
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| 227 | X509_STORE_CTX_set0_trusted_stack(csc, tchain);
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| 228 | if (crls)
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| 229 | X509_STORE_CTX_set0_crls(csc, crls);
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| 230 | i = X509_verify_cert(csc);
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| 231 | if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) {
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| 232 | printf("%s: OK\n", (file == NULL) ? "stdin" : file);
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| 233 | ret = 1;
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| 234 | if (show_chain) {
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| 235 | int j;
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| 236 |
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| 237 | chain = X509_STORE_CTX_get1_chain(csc);
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| 238 | num_untrusted = X509_STORE_CTX_get_num_untrusted(csc);
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| 239 | printf("Chain:\n");
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| 240 | for (j = 0; j < sk_X509_num(chain); j++) {
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| 241 | X509 *cert = sk_X509_value(chain, j);
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| 242 | printf("depth=%d: ", j);
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| 243 | X509_NAME_print_ex_fp(stdout,
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| 244 | X509_get_subject_name(cert),
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| 245 | 0, XN_FLAG_ONELINE);
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| 246 | if (j < num_untrusted)
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| 247 | printf(" (untrusted)");
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| 248 | printf("\n");
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| 249 | }
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| 250 | sk_X509_pop_free(chain, X509_free);
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| 251 | }
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| 252 | } else {
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| 253 | printf("error %s: verification failed\n", (file == NULL) ? "stdin" : file);
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| 254 | }
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| 255 | X509_STORE_CTX_free(csc);
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| 256 |
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| 257 | end:
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| 258 | if (i <= 0)
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| 259 | ERR_print_errors(bio_err);
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| 260 | X509_free(x);
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| 261 |
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| 262 | return ret;
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| 263 | }
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| 264 |
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| 265 | static int cb(int ok, X509_STORE_CTX *ctx)
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| 266 | {
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| 267 | int cert_error = X509_STORE_CTX_get_error(ctx);
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| 268 | X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
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| 269 |
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| 270 | if (!ok) {
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| 271 | if (current_cert) {
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| 272 | X509_NAME_print_ex(bio_err,
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| 273 | X509_get_subject_name(current_cert),
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| 274 | 0, XN_FLAG_ONELINE);
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| 275 | BIO_printf(bio_err, "\n");
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| 276 | }
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| 277 | BIO_printf(bio_err, "%serror %d at %d depth lookup: %s\n",
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| 278 | X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path] " : "",
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| 279 | cert_error,
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| 280 | X509_STORE_CTX_get_error_depth(ctx),
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| 281 | X509_verify_cert_error_string(cert_error));
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| 282 | switch (cert_error) {
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| 283 | case X509_V_ERR_NO_EXPLICIT_POLICY:
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| 284 | policies_print(ctx);
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| 285 | case X509_V_ERR_CERT_HAS_EXPIRED:
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| 286 |
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| 287 | /*
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| 288 | * since we are just checking the certificates, it is ok if they
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| 289 | * are self signed. But we should still warn the user.
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| 290 | */
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| 291 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
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| 292 | /* Continue after extension errors too */
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| 293 | case X509_V_ERR_INVALID_CA:
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| 294 | case X509_V_ERR_INVALID_NON_CA:
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| 295 | case X509_V_ERR_PATH_LENGTH_EXCEEDED:
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| 296 | case X509_V_ERR_INVALID_PURPOSE:
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| 297 | case X509_V_ERR_CRL_HAS_EXPIRED:
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| 298 | case X509_V_ERR_CRL_NOT_YET_VALID:
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| 299 | case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
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| 300 | ok = 1;
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| 301 | }
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| 302 |
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| 303 | return ok;
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| 304 |
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| 305 | }
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| 306 | if (cert_error == X509_V_OK && ok == 2)
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| 307 | policies_print(ctx);
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| 308 | if (!v_verbose)
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| 309 | ERR_clear_error();
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| 310 | return (ok);
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| 311 | }
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