lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use |
| 5 | * this file except in compliance with the License. You can obtain a copy |
| 6 | * in the file LICENSE in the source distribution or at |
| 7 | * https://www.openssl.org/source/license.html |
| 8 | */ |
| 9 | |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | #include "apps.h" |
| 14 | #include "progs.h" |
| 15 | #include <openssl/bio.h> |
| 16 | #include <openssl/err.h> |
| 17 | #include <openssl/x509.h> |
| 18 | #include <openssl/x509v3.h> |
| 19 | #include <openssl/pem.h> |
| 20 | |
| 21 | static int cb(int ok, X509_STORE_CTX *ctx); |
| 22 | static int check(X509_STORE *ctx, const char *file, |
| 23 | STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, |
| 24 | STACK_OF(X509_CRL) *crls, int show_chain); |
| 25 | static int v_verbose = 0, vflags = 0; |
| 26 | |
| 27 | typedef enum OPTION_choice { |
| 28 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, |
| 29 | OPT_ENGINE, OPT_CAPATH, OPT_CAFILE, OPT_NOCAPATH, OPT_NOCAFILE, |
| 30 | OPT_UNTRUSTED, OPT_TRUSTED, OPT_CRLFILE, OPT_CRL_DOWNLOAD, OPT_SHOW_CHAIN, |
| 31 | OPT_V_ENUM, OPT_NAMEOPT, |
| 32 | OPT_VERBOSE |
| 33 | } OPTION_CHOICE; |
| 34 | |
| 35 | const OPTIONS verify_options[] = { |
| 36 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"}, |
| 37 | {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, |
| 38 | {"help", OPT_HELP, '-', "Display this summary"}, |
| 39 | {"verbose", OPT_VERBOSE, '-', |
| 40 | "Print extra information about the operations being performed."}, |
| 41 | {"CApath", OPT_CAPATH, '/', "A directory of trusted certificates"}, |
| 42 | {"CAfile", OPT_CAFILE, '<', "A file of trusted certificates"}, |
| 43 | {"no-CAfile", OPT_NOCAFILE, '-', |
| 44 | "Do not load the default certificates file"}, |
| 45 | {"no-CApath", OPT_NOCAPATH, '-', |
| 46 | "Do not load certificates from the default certificates directory"}, |
| 47 | {"untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates"}, |
| 48 | {"trusted", OPT_TRUSTED, '<', "A file of trusted certificates"}, |
| 49 | {"CRLfile", OPT_CRLFILE, '<', |
| 50 | "File containing one or more CRL's (in PEM format) to load"}, |
| 51 | {"crl_download", OPT_CRL_DOWNLOAD, '-', |
| 52 | "Attempt to download CRL information for this certificate"}, |
| 53 | {"show_chain", OPT_SHOW_CHAIN, '-', |
| 54 | "Display information about the certificate chain"}, |
| 55 | {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"}, |
| 56 | OPT_V_OPTIONS, |
| 57 | #ifndef OPENSSL_NO_ENGINE |
| 58 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, |
| 59 | #endif |
| 60 | {NULL} |
| 61 | }; |
| 62 | |
| 63 | int verify_main(int argc, char **argv) |
| 64 | { |
| 65 | ENGINE *e = NULL; |
| 66 | STACK_OF(X509) *untrusted = NULL, *trusted = NULL; |
| 67 | STACK_OF(X509_CRL) *crls = NULL; |
| 68 | X509_STORE *store = NULL; |
| 69 | X509_VERIFY_PARAM *vpm = NULL; |
| 70 | const char *prog, *CApath = NULL, *CAfile = NULL; |
| 71 | int noCApath = 0, noCAfile = 0; |
| 72 | int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1; |
| 73 | OPTION_CHOICE o; |
| 74 | |
| 75 | if ((vpm = X509_VERIFY_PARAM_new()) == NULL) |
| 76 | goto end; |
| 77 | |
| 78 | prog = opt_init(argc, argv, verify_options); |
| 79 | while ((o = opt_next()) != OPT_EOF) { |
| 80 | switch (o) { |
| 81 | case OPT_EOF: |
| 82 | case OPT_ERR: |
| 83 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| 84 | goto end; |
| 85 | case OPT_HELP: |
| 86 | opt_help(verify_options); |
| 87 | BIO_printf(bio_err, "Recognized usages:\n"); |
| 88 | for (i = 0; i < X509_PURPOSE_get_count(); i++) { |
| 89 | X509_PURPOSE *ptmp; |
| 90 | ptmp = X509_PURPOSE_get0(i); |
| 91 | BIO_printf(bio_err, "\t%-10s\t%s\n", |
| 92 | X509_PURPOSE_get0_sname(ptmp), |
| 93 | X509_PURPOSE_get0_name(ptmp)); |
| 94 | } |
| 95 | |
| 96 | BIO_printf(bio_err, "Recognized verify names:\n"); |
| 97 | for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) { |
| 98 | const X509_VERIFY_PARAM *vptmp; |
| 99 | vptmp = X509_VERIFY_PARAM_get0(i); |
| 100 | BIO_printf(bio_err, "\t%-10s\n", |
| 101 | X509_VERIFY_PARAM_get0_name(vptmp)); |
| 102 | } |
| 103 | ret = 0; |
| 104 | goto end; |
| 105 | case OPT_V_CASES: |
| 106 | if (!opt_verify(o, vpm)) |
| 107 | goto end; |
| 108 | vpmtouched++; |
| 109 | break; |
| 110 | case OPT_CAPATH: |
| 111 | CApath = opt_arg(); |
| 112 | break; |
| 113 | case OPT_CAFILE: |
| 114 | CAfile = opt_arg(); |
| 115 | break; |
| 116 | case OPT_NOCAPATH: |
| 117 | noCApath = 1; |
| 118 | break; |
| 119 | case OPT_NOCAFILE: |
| 120 | noCAfile = 1; |
| 121 | break; |
| 122 | case OPT_UNTRUSTED: |
| 123 | /* Zero or more times */ |
| 124 | if (!load_certs(opt_arg(), &untrusted, FORMAT_PEM, NULL, |
| 125 | "untrusted certificates")) |
| 126 | goto end; |
| 127 | break; |
| 128 | case OPT_TRUSTED: |
| 129 | /* Zero or more times */ |
| 130 | noCAfile = 1; |
| 131 | noCApath = 1; |
| 132 | if (!load_certs(opt_arg(), &trusted, FORMAT_PEM, NULL, |
| 133 | "trusted certificates")) |
| 134 | goto end; |
| 135 | break; |
| 136 | case OPT_CRLFILE: |
| 137 | /* Zero or more times */ |
| 138 | if (!load_crls(opt_arg(), &crls, FORMAT_PEM, NULL, |
| 139 | "other CRLs")) |
| 140 | goto end; |
| 141 | break; |
| 142 | case OPT_CRL_DOWNLOAD: |
| 143 | crl_download = 1; |
| 144 | break; |
| 145 | case OPT_ENGINE: |
| 146 | if ((e = setup_engine(opt_arg(), 0)) == NULL) { |
| 147 | /* Failure message already displayed */ |
| 148 | goto end; |
| 149 | } |
| 150 | break; |
| 151 | case OPT_SHOW_CHAIN: |
| 152 | show_chain = 1; |
| 153 | break; |
| 154 | case OPT_NAMEOPT: |
| 155 | if (!set_nameopt(opt_arg())) |
| 156 | goto end; |
| 157 | break; |
| 158 | case OPT_VERBOSE: |
| 159 | v_verbose = 1; |
| 160 | break; |
| 161 | } |
| 162 | } |
| 163 | argc = opt_num_rest(); |
| 164 | argv = opt_rest(); |
| 165 | if (trusted != NULL && (CAfile || CApath)) { |
| 166 | BIO_printf(bio_err, |
| 167 | "%s: Cannot use -trusted with -CAfile or -CApath\n", |
| 168 | prog); |
| 169 | goto end; |
| 170 | } |
| 171 | |
| 172 | if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL) |
| 173 | goto end; |
| 174 | X509_STORE_set_verify_cb(store, cb); |
| 175 | |
| 176 | if (vpmtouched) |
| 177 | X509_STORE_set1_param(store, vpm); |
| 178 | |
| 179 | ERR_clear_error(); |
| 180 | |
| 181 | if (crl_download) |
| 182 | store_setup_crl_download(store); |
| 183 | |
| 184 | ret = 0; |
| 185 | if (argc < 1) { |
| 186 | if (check(store, NULL, untrusted, trusted, crls, show_chain) != 1) |
| 187 | ret = -1; |
| 188 | } else { |
| 189 | for (i = 0; i < argc; i++) |
| 190 | if (check(store, argv[i], untrusted, trusted, crls, |
| 191 | show_chain) != 1) |
| 192 | ret = -1; |
| 193 | } |
| 194 | |
| 195 | end: |
| 196 | X509_VERIFY_PARAM_free(vpm); |
| 197 | X509_STORE_free(store); |
| 198 | sk_X509_pop_free(untrusted, X509_free); |
| 199 | sk_X509_pop_free(trusted, X509_free); |
| 200 | sk_X509_CRL_pop_free(crls, X509_CRL_free); |
| 201 | release_engine(e); |
| 202 | return (ret < 0 ? 2 : ret); |
| 203 | } |
| 204 | |
| 205 | static int check(X509_STORE *ctx, const char *file, |
| 206 | STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, |
| 207 | STACK_OF(X509_CRL) *crls, int show_chain) |
| 208 | { |
| 209 | X509 *x = NULL; |
| 210 | int i = 0, ret = 0; |
| 211 | X509_STORE_CTX *csc; |
| 212 | STACK_OF(X509) *chain = NULL; |
| 213 | int num_untrusted; |
| 214 | |
| 215 | x = load_cert(file, FORMAT_PEM, "certificate file"); |
| 216 | if (x == NULL) |
| 217 | goto end; |
| 218 | |
| 219 | csc = X509_STORE_CTX_new(); |
| 220 | if (csc == NULL) { |
| 221 | printf("error %s: X.509 store context allocation failed\n", |
| 222 | (file == NULL) ? "stdin" : file); |
| 223 | goto end; |
| 224 | } |
| 225 | |
| 226 | X509_STORE_set_flags(ctx, vflags); |
| 227 | if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) { |
| 228 | X509_STORE_CTX_free(csc); |
| 229 | printf("error %s: X.509 store context initialization failed\n", |
| 230 | (file == NULL) ? "stdin" : file); |
| 231 | goto end; |
| 232 | } |
| 233 | if (tchain != NULL) |
| 234 | X509_STORE_CTX_set0_trusted_stack(csc, tchain); |
| 235 | if (crls != NULL) |
| 236 | X509_STORE_CTX_set0_crls(csc, crls); |
| 237 | i = X509_verify_cert(csc); |
| 238 | if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) { |
| 239 | printf("%s: OK\n", (file == NULL) ? "stdin" : file); |
| 240 | ret = 1; |
| 241 | if (show_chain) { |
| 242 | int j; |
| 243 | |
| 244 | chain = X509_STORE_CTX_get1_chain(csc); |
| 245 | num_untrusted = X509_STORE_CTX_get_num_untrusted(csc); |
| 246 | printf("Chain:\n"); |
| 247 | for (j = 0; j < sk_X509_num(chain); j++) { |
| 248 | X509 *cert = sk_X509_value(chain, j); |
| 249 | printf("depth=%d: ", j); |
| 250 | X509_NAME_print_ex_fp(stdout, |
| 251 | X509_get_subject_name(cert), |
| 252 | 0, get_nameopt()); |
| 253 | if (j < num_untrusted) |
| 254 | printf(" (untrusted)"); |
| 255 | printf("\n"); |
| 256 | } |
| 257 | sk_X509_pop_free(chain, X509_free); |
| 258 | } |
| 259 | } else { |
| 260 | printf("error %s: verification failed\n", (file == NULL) ? "stdin" : file); |
| 261 | } |
| 262 | X509_STORE_CTX_free(csc); |
| 263 | |
| 264 | end: |
| 265 | if (i <= 0) |
| 266 | ERR_print_errors(bio_err); |
| 267 | X509_free(x); |
| 268 | |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | static int cb(int ok, X509_STORE_CTX *ctx) |
| 273 | { |
| 274 | int cert_error = X509_STORE_CTX_get_error(ctx); |
| 275 | X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx); |
| 276 | |
| 277 | if (!ok) { |
| 278 | if (current_cert != NULL) { |
| 279 | X509_NAME_print_ex(bio_err, |
| 280 | X509_get_subject_name(current_cert), |
| 281 | 0, get_nameopt()); |
| 282 | BIO_printf(bio_err, "\n"); |
| 283 | } |
| 284 | BIO_printf(bio_err, "%serror %d at %d depth lookup: %s\n", |
| 285 | X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path] " : "", |
| 286 | cert_error, |
| 287 | X509_STORE_CTX_get_error_depth(ctx), |
| 288 | X509_verify_cert_error_string(cert_error)); |
| 289 | |
| 290 | /* |
| 291 | * Pretend that some errors are ok, so they don't stop further |
| 292 | * processing of the certificate chain. Setting ok = 1 does this. |
| 293 | * After X509_verify_cert() is done, we verify that there were |
| 294 | * no actual errors, even if the returned value was positive. |
| 295 | */ |
| 296 | switch (cert_error) { |
| 297 | case X509_V_ERR_NO_EXPLICIT_POLICY: |
| 298 | policies_print(ctx); |
| 299 | /* fall thru */ |
| 300 | case X509_V_ERR_CERT_HAS_EXPIRED: |
| 301 | /* Continue even if the leaf is a self signed cert */ |
| 302 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: |
| 303 | /* Continue after extension errors too */ |
| 304 | case X509_V_ERR_INVALID_CA: |
| 305 | case X509_V_ERR_INVALID_NON_CA: |
| 306 | case X509_V_ERR_PATH_LENGTH_EXCEEDED: |
| 307 | case X509_V_ERR_INVALID_PURPOSE: |
| 308 | case X509_V_ERR_CRL_HAS_EXPIRED: |
| 309 | case X509_V_ERR_CRL_NOT_YET_VALID: |
| 310 | case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION: |
| 311 | ok = 1; |
| 312 | } |
| 313 | |
| 314 | return ok; |
| 315 | |
| 316 | } |
| 317 | if (cert_error == X509_V_OK && ok == 2) |
| 318 | policies_print(ctx); |
| 319 | if (!v_verbose) |
| 320 | ERR_clear_error(); |
| 321 | return ok; |
| 322 | } |