1 /* 2 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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 <string.h> 12 #include <ctype.h> 13 #include <limits.h> 14 #include <errno.h> 15 16 #include <openssl/crypto.h> 17 #include <openssl/evp.h> 18 #include <openssl/x509.h> 19 #include <openssl/ssl.h> 20 #include <openssl/err.h> 21 #include <openssl/conf.h> 22 #ifndef OPENSSL_NO_ENGINE 23 #include <openssl/engine.h> 24 #endif 25 #include "testutil.h" 26 27 #include "internal/nelem.h" 28 29 #define _UC(c) ((unsigned char)(c)) 30 31 static const char *basedomain; 32 static const char *CAfile; 33 static const char *tlsafile; 34 35 /* 36 * Forward declaration, of function that uses internal interfaces, from headers 37 * included at the end of this module. 38 */ 39 static void store_ctx_dane_init(X509_STORE_CTX *, SSL *); 40 41 static int saved_errno; 42 43 static void save_errno(void) 44 { 45 saved_errno = errno; 46 } 47 48 static int restore_errno(void) 49 { 50 int ret = errno; 51 errno = saved_errno; 52 return ret; 53 } 54 55 static int verify_chain(SSL *ssl, STACK_OF(X509) *chain) 56 { 57 X509_STORE_CTX *store_ctx = NULL; 58 SSL_CTX *ssl_ctx = NULL; 59 X509_STORE *store = NULL; 60 int ret = 0; 61 int store_ctx_idx = SSL_get_ex_data_X509_STORE_CTX_idx(); 62 63 if (!TEST_ptr(store_ctx = X509_STORE_CTX_new()) 64 || !TEST_ptr(ssl_ctx = SSL_get_SSL_CTX(ssl)) 65 || !TEST_ptr(store = SSL_CTX_get_cert_store(ssl_ctx)) 66 || !TEST_true(X509_STORE_CTX_init(store_ctx, store, NULL, chain)) 67 || !TEST_true(X509_STORE_CTX_set_ex_data(store_ctx, store_ctx_idx, 68 ssl))) 69 goto end; 70 71 X509_STORE_CTX_set_default(store_ctx, SSL_is_server(ssl) ? "ssl_client" : "ssl_server"); 72 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(store_ctx), 73 SSL_get0_param(ssl)); 74 store_ctx_dane_init(store_ctx, ssl); 75 76 if (SSL_get_verify_callback(ssl) != NULL) 77 X509_STORE_CTX_set_verify_cb(store_ctx, SSL_get_verify_callback(ssl)); 78 79 /* Mask "internal failures" (-1) from our return value. */ 80 if (!TEST_int_ge(ret = X509_STORE_CTX_verify(store_ctx), 0)) 81 ret = 0; 82 83 SSL_set_verify_result(ssl, X509_STORE_CTX_get_error(store_ctx)); 84 85 end: 86 X509_STORE_CTX_free(store_ctx); 87 return ret; 88 } 89 90 static STACK_OF(X509) *load_chain(BIO *fp, int nelem) 91 { 92 int count; 93 char *name = 0; 94 char *header = 0; 95 unsigned char *data = 0; 96 long len; 97 char *errtype = 0; /* if error: cert or pkey? */ 98 STACK_OF(X509) *chain; 99 typedef X509 *(*d2i_X509_t)(X509 **, const unsigned char **, long); 100 101 if (!TEST_ptr(chain = sk_X509_new_null())) 102 goto err; 103 104 for (count = 0; 105 count < nelem && errtype == 0 106 && PEM_read_bio(fp, &name, &header, &data, &len) == 1; 107 ++count) { 108 if (strcmp(name, PEM_STRING_X509) == 0 109 || strcmp(name, PEM_STRING_X509_TRUSTED) == 0 110 || strcmp(name, PEM_STRING_X509_OLD) == 0) { 111 d2i_X509_t d = strcmp(name, PEM_STRING_X509_TRUSTED) != 0 112 ? d2i_X509_AUX 113 : d2i_X509; 114 X509 *cert; 115 const unsigned char *p = data; 116 117 if (!TEST_ptr(cert = d(0, &p, len)) 118 || !TEST_long_eq(p - data, len)) { 119 TEST_info("Certificate parsing error"); 120 goto err; 121 } 122 123 if (!TEST_true(sk_X509_push(chain, cert))) 124 goto err; 125 } else { 126 TEST_info("Unknown chain file object %s", name); 127 goto err; 128 } 129 130 OPENSSL_free(name); 131 OPENSSL_free(header); 132 OPENSSL_free(data); 133 name = header = NULL; 134 data = NULL; 135 } 136 137 if (count == nelem) { 138 ERR_clear_error(); 139 return chain; 140 } 141 142 err: 143 OPENSSL_free(name); 144 OPENSSL_free(header); 145 OPENSSL_free(data); 146 OSSL_STACK_OF_X509_free(chain); 147 return NULL; 148 } 149 150 static char *read_to_eol(BIO *f) 151 { 152 static char buf[4096]; 153 int n; 154 155 if (BIO_gets(f, buf, sizeof(buf)) <= 0) 156 return NULL; 157 158 n = strlen(buf); 159 if (buf[n - 1] != '\n') { 160 if (n + 1 == sizeof(buf)) 161 TEST_error("input too long"); 162 else 163 TEST_error("EOF before newline"); 164 return NULL; 165 } 166 167 /* Trim trailing whitespace */ 168 while (n > 0 && isspace(_UC(buf[n - 1]))) 169 buf[--n] = '\0'; 170 171 return buf; 172 } 173 174 /* 175 * Hex decoder that tolerates optional whitespace 176 */ 177 static ossl_ssize_t hexdecode(const char *in, void *result) 178 { 179 unsigned char **out = (unsigned char **)result; 180 unsigned char *ret; 181 unsigned char *cp; 182 uint8_t byte; 183 int nibble = 0; 184 185 if (!TEST_ptr(ret = OPENSSL_malloc(strlen(in) / 2))) 186 return -1; 187 cp = ret; 188 189 for (byte = 0; *in; ++in) { 190 int x; 191 192 if (isspace(_UC(*in))) 193 continue; 194 x = OPENSSL_hexchar2int(*in); 195 if (x < 0) { 196 OPENSSL_free(ret); 197 return 0; 198 } 199 byte |= (char)x; 200 if ((nibble ^= 1) == 0) { 201 *cp++ = byte; 202 byte = 0; 203 } else { 204 byte <<= 4; 205 } 206 } 207 if (nibble != 0) { 208 OPENSSL_free(ret); 209 return 0; 210 } 211 212 return cp - (*out = ret); 213 } 214 215 static ossl_ssize_t checked_uint8(const char *in, void *out) 216 { 217 uint8_t *result = (uint8_t *)out; 218 const char *cp = in; 219 char *endp; 220 long v; 221 int e; 222 223 save_errno(); 224 v = strtol(cp, &endp, 10); 225 e = restore_errno(); 226 227 if (((v == LONG_MIN || v == LONG_MAX) && e == ERANGE) || endp == cp || !isspace(_UC(*endp)) || v != (*(uint8_t *)result = (uint8_t)v)) { 228 return -1; 229 } 230 for (cp = endp; isspace(_UC(*cp)); ++cp) 231 continue; 232 return cp - in; 233 } 234 235 struct tlsa_field { 236 void *var; 237 const char *name; 238 ossl_ssize_t (*parser)(const char *, void *); 239 }; 240 241 static int tlsa_import_rr(SSL *ssl, const char *rrdata) 242 { 243 static uint8_t usage; 244 static uint8_t selector; 245 static uint8_t mtype; 246 static unsigned char *data = NULL; 247 static struct tlsa_field tlsa_fields[] = { 248 { &usage, "usage", checked_uint8 }, 249 { &selector, "selector", checked_uint8 }, 250 { &mtype, "mtype", checked_uint8 }, 251 { &data, "data", hexdecode }, 252 { 253 NULL, 254 } 255 }; 256 int ret; 257 struct tlsa_field *f; 258 const char *cp = rrdata; 259 ossl_ssize_t len = 0; 260 261 for (f = tlsa_fields; f->var; ++f) { 262 if ((len = f->parser(cp += len, f->var)) <= 0) { 263 TEST_info("bad TLSA %s field in: %s", f->name, rrdata); 264 return 0; 265 } 266 } 267 268 ret = SSL_dane_tlsa_add(ssl, usage, selector, mtype, data, len); 269 OPENSSL_free(data); 270 if (ret == 0) { 271 TEST_info("unusable TLSA rrdata: %s", rrdata); 272 return 0; 273 } 274 if (ret < 0) { 275 TEST_info("error loading TLSA rrdata: %s", rrdata); 276 return 0; 277 } 278 279 return ret; 280 } 281 282 static int allws(const char *cp) 283 { 284 while (*cp) 285 if (!isspace(_UC(*cp++))) 286 return 0; 287 return 1; 288 } 289 290 static int test_tlsafile(SSL_CTX *ctx, const char *base_name, 291 BIO *f, const char *path) 292 { 293 char *line; 294 int testno = 0; 295 int ret = 1; 296 SSL *ssl; 297 298 while (ret > 0 && (line = read_to_eol(f)) != NULL) { 299 STACK_OF(X509) *chain; 300 int ntlsa; 301 int ncert; 302 int noncheck; 303 int want; 304 int want_depth; 305 int off; 306 int i; 307 int ok; 308 int err; 309 int mdpth; 310 311 if (*line == '\0' || *line == '#') 312 continue; 313 314 ++testno; 315 if (sscanf(line, "%d %d %d %d %d%n", 316 &ntlsa, &ncert, &noncheck, &want, &want_depth, &off) 317 != 5 318 || !allws(line + off)) { 319 TEST_error("Malformed line for test %d", testno); 320 return 0; 321 } 322 323 if (!TEST_ptr(ssl = SSL_new(ctx))) 324 return 0; 325 SSL_set_connect_state(ssl); 326 if (SSL_dane_enable(ssl, base_name) <= 0) { 327 SSL_free(ssl); 328 return 0; 329 } 330 if (noncheck) 331 SSL_dane_set_flags(ssl, DANE_FLAG_NO_DANE_EE_NAMECHECKS); 332 333 for (i = 0; i < ntlsa; ++i) { 334 if ((line = read_to_eol(f)) == NULL || !tlsa_import_rr(ssl, line)) { 335 SSL_free(ssl); 336 return 0; 337 } 338 } 339 340 /* Don't report old news */ 341 ERR_clear_error(); 342 if (!TEST_ptr(chain = load_chain(f, ncert))) { 343 SSL_free(ssl); 344 return 0; 345 } 346 347 ok = verify_chain(ssl, chain); 348 OSSL_STACK_OF_X509_free(chain); 349 err = SSL_get_verify_result(ssl); 350 /* 351 * Peek under the hood, normally TLSA match data is hidden when 352 * verification fails, we can obtain any suppressed data by setting the 353 * verification result to X509_V_OK before looking. 354 */ 355 SSL_set_verify_result(ssl, X509_V_OK); 356 mdpth = SSL_get0_dane_authority(ssl, NULL, NULL); 357 /* Not needed any more, but lead by example and put the error back. */ 358 SSL_set_verify_result(ssl, err); 359 SSL_free(ssl); 360 361 if (!TEST_int_eq(err, want)) { 362 if (want == X509_V_OK) 363 TEST_info("Verification failure in test %d: %d=%s", 364 testno, err, X509_verify_cert_error_string(err)); 365 else 366 TEST_info("Unexpected error in test %d", testno); 367 ret = 0; 368 continue; 369 } 370 if (!TEST_false(want == 0 && ok == 0)) { 371 TEST_info("Verification failure in test %d: ok=0", testno); 372 ret = 0; 373 continue; 374 } 375 if (!TEST_int_eq(mdpth, want_depth)) { 376 TEST_info("In test test %d", testno); 377 ret = 0; 378 } 379 } 380 ERR_clear_error(); 381 382 return ret; 383 } 384 385 static int run_tlsatest(void) 386 { 387 SSL_CTX *ctx = NULL; 388 BIO *f = NULL; 389 int ret = 0; 390 391 if (!TEST_ptr(f = BIO_new_file(tlsafile, "r")) 392 || !TEST_ptr(ctx = SSL_CTX_new(TLS_client_method())) 393 || !TEST_int_gt(SSL_CTX_dane_enable(ctx), 0) 394 || !TEST_true(SSL_CTX_load_verify_file(ctx, CAfile)) 395 || !TEST_int_gt(SSL_CTX_dane_mtype_set(ctx, EVP_sha512(), 2, 1), 0) 396 || !TEST_int_gt(SSL_CTX_dane_mtype_set(ctx, EVP_sha256(), 1, 2), 0) 397 || !TEST_int_gt(test_tlsafile(ctx, basedomain, f, tlsafile), 0)) 398 goto end; 399 ret = 1; 400 401 end: 402 BIO_free(f); 403 SSL_CTX_free(ctx); 404 405 return ret; 406 } 407 408 OPT_TEST_DECLARE_USAGE("basedomain CAfile tlsafile\n") 409 410 int setup_tests(void) 411 { 412 if (!test_skip_common_options()) { 413 TEST_error("Error parsing test options\n"); 414 return 0; 415 } 416 417 if (!TEST_ptr(basedomain = test_get_argument(0)) 418 || !TEST_ptr(CAfile = test_get_argument(1)) 419 || !TEST_ptr(tlsafile = test_get_argument(2))) 420 return 0; 421 422 ADD_TEST(run_tlsatest); 423 return 1; 424 } 425 426 #include "internal/dane.h" 427 428 static void store_ctx_dane_init(X509_STORE_CTX *store_ctx, SSL *ssl) 429 { 430 X509_STORE_CTX_set0_dane(store_ctx, SSL_get0_dane(ssl)); 431 } 432
Indexes created Sat Feb 28 05:31:39 UTC 2026