1 /* 2 * Copyright 2015-2021 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 <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 X509 *cert = NULL; 61 int ret = 0; 62 int store_ctx_idx = SSL_get_ex_data_X509_STORE_CTX_idx(); 63 64 if (!TEST_ptr(store_ctx = X509_STORE_CTX_new()) 65 || !TEST_ptr(ssl_ctx = SSL_get_SSL_CTX(ssl)) 66 || !TEST_ptr(store = SSL_CTX_get_cert_store(ssl_ctx)) 67 || !TEST_ptr(cert = sk_X509_value(chain, 0)) 68 || !TEST_true(X509_STORE_CTX_init(store_ctx, store, cert, chain)) 69 || !TEST_true(X509_STORE_CTX_set_ex_data(store_ctx, store_ctx_idx, 70 ssl))) 71 goto end; 72 73 X509_STORE_CTX_set_default(store_ctx, 74 SSL_is_server(ssl) ? "ssl_client" : "ssl_server"); 75 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(store_ctx), 76 SSL_get0_param(ssl)); 77 store_ctx_dane_init(store_ctx, ssl); 78 79 if (SSL_get_verify_callback(ssl) != NULL) 80 X509_STORE_CTX_set_verify_cb(store_ctx, SSL_get_verify_callback(ssl)); 81 82 /* Mask "internal failures" (-1) from our return value. */ 83 if (!TEST_int_ge(ret = X509_verify_cert(store_ctx), 0)) 84 ret = 0; 85 86 SSL_set_verify_result(ssl, X509_STORE_CTX_get_error(store_ctx)); 87 X509_STORE_CTX_cleanup(store_ctx); 88 89 end: 90 X509_STORE_CTX_free(store_ctx); 91 return ret; 92 } 93 94 static STACK_OF(X509) *load_chain(BIO *fp, int nelem) 95 { 96 int count; 97 char *name = 0; 98 char *header = 0; 99 unsigned char *data = 0; 100 long len; 101 char *errtype = 0; /* if error: cert or pkey? */ 102 STACK_OF(X509) *chain; 103 typedef X509 *(*d2i_X509_t)(X509 **, const unsigned char **, long); 104 105 if (!TEST_ptr(chain = sk_X509_new_null())) 106 goto err; 107 108 for (count = 0; 109 count < nelem && errtype == 0 110 && PEM_read_bio(fp, &name, &header, &data, &len) == 1; 111 ++count) { 112 if (strcmp(name, PEM_STRING_X509) == 0 113 || strcmp(name, PEM_STRING_X509_TRUSTED) == 0 114 || strcmp(name, PEM_STRING_X509_OLD) == 0) { 115 d2i_X509_t d = strcmp(name, PEM_STRING_X509_TRUSTED) != 0 116 ? d2i_X509_AUX : d2i_X509; 117 X509 *cert; 118 const unsigned char *p = data; 119 120 if (!TEST_ptr(cert = d(0, &p, len)) 121 || !TEST_long_eq(p - data, len)) { 122 TEST_info("Certificate parsing error"); 123 goto err; 124 } 125 126 if (!TEST_true(sk_X509_push(chain, cert))) 127 goto err; 128 } else { 129 TEST_info("Unknown chain file object %s", name); 130 goto err; 131 } 132 133 OPENSSL_free(name); 134 OPENSSL_free(header); 135 OPENSSL_free(data); 136 name = header = NULL; 137 data = NULL; 138 } 139 140 if (count == nelem) { 141 ERR_clear_error(); 142 return chain; 143 } 144 145 err: 146 OPENSSL_free(name); 147 OPENSSL_free(header); 148 OPENSSL_free(data); 149 sk_X509_pop_free(chain, X509_free); 150 return NULL; 151 } 152 153 static char *read_to_eol(BIO *f) 154 { 155 static char buf[4096]; 156 int n; 157 158 if (!BIO_gets(f, buf, sizeof(buf))) 159 return NULL; 160 161 n = strlen(buf); 162 if (buf[n - 1] != '\n') { 163 if (n + 1 == sizeof(buf)) 164 TEST_error("input too long"); 165 else 166 TEST_error("EOF before newline"); 167 return NULL; 168 } 169 170 /* Trim trailing whitespace */ 171 while (n > 0 && isspace(_UC(buf[n - 1]))) 172 buf[--n] = '\0'; 173 174 return buf; 175 } 176 177 /* 178 * Hex decoder that tolerates optional whitespace 179 */ 180 static ossl_ssize_t hexdecode(const char *in, void *result) 181 { 182 unsigned char **out = (unsigned char **)result; 183 unsigned char *ret; 184 unsigned char *cp; 185 uint8_t byte; 186 int nibble = 0; 187 188 if (!TEST_ptr(ret = OPENSSL_malloc(strlen(in) / 2))) 189 return -1; 190 cp = ret; 191 192 for (byte = 0; *in; ++in) { 193 int x; 194 195 if (isspace(_UC(*in))) 196 continue; 197 x = OPENSSL_hexchar2int(*in); 198 if (x < 0) { 199 OPENSSL_free(ret); 200 return 0; 201 } 202 byte |= (char)x; 203 if ((nibble ^= 1) == 0) { 204 *cp++ = byte; 205 byte = 0; 206 } else { 207 byte <<= 4; 208 } 209 } 210 if (nibble != 0) { 211 OPENSSL_free(ret); 212 return 0; 213 } 214 215 return cp - (*out = ret); 216 } 217 218 static ossl_ssize_t checked_uint8(const char *in, void *out) 219 { 220 uint8_t *result = (uint8_t *)out; 221 const char *cp = in; 222 char *endp; 223 long v; 224 int e; 225 226 save_errno(); 227 v = strtol(cp, &endp, 10); 228 e = restore_errno(); 229 230 if (((v == LONG_MIN || v == LONG_MAX) && e == ERANGE) || 231 endp == cp || !isspace(_UC(*endp)) || 232 v != (*(uint8_t *)result = (uint8_t) v)) { 233 return -1; 234 } 235 for (cp = endp; isspace(_UC(*cp)); ++cp) 236 continue; 237 return cp - in; 238 } 239 240 struct tlsa_field { 241 void *var; 242 const char *name; 243 ossl_ssize_t (*parser)(const char *, void *); 244 }; 245 246 static int tlsa_import_rr(SSL *ssl, const char *rrdata) 247 { 248 static uint8_t usage; 249 static uint8_t selector; 250 static uint8_t mtype; 251 static unsigned char *data = NULL; 252 static struct tlsa_field tlsa_fields[] = { 253 { &usage, "usage", checked_uint8 }, 254 { &selector, "selector", checked_uint8 }, 255 { &mtype, "mtype", checked_uint8 }, 256 { &data, "data", hexdecode }, 257 { NULL, } 258 }; 259 int ret; 260 struct tlsa_field *f; 261 const char *cp = rrdata; 262 ossl_ssize_t len = 0; 263 264 for (f = tlsa_fields; f->var; ++f) { 265 if ((len = f->parser(cp += len, f->var)) <= 0) { 266 TEST_info("bad TLSA %s field in: %s", f->name, rrdata); 267 return 0; 268 } 269 } 270 271 ret = SSL_dane_tlsa_add(ssl, usage, selector, mtype, data, len); 272 OPENSSL_free(data); 273 if (ret == 0) { 274 TEST_info("unusable TLSA rrdata: %s", rrdata); 275 return 0; 276 } 277 if (ret < 0) { 278 TEST_info("error loading TLSA rrdata: %s", rrdata); 279 return 0; 280 } 281 282 return ret; 283 } 284 285 static int allws(const char *cp) 286 { 287 while (*cp) 288 if (!isspace(_UC(*cp++))) 289 return 0; 290 return 1; 291 } 292 293 static int test_tlsafile(SSL_CTX *ctx, const char *base_name, 294 BIO *f, const char *path) 295 { 296 char *line; 297 int testno = 0; 298 int ret = 1; 299 SSL *ssl; 300 301 while (ret > 0 && (line = read_to_eol(f)) != NULL) { 302 STACK_OF(X509) *chain; 303 int ntlsa; 304 int ncert; 305 int noncheck; 306 int want; 307 int want_depth; 308 int off; 309 int i; 310 int ok; 311 int err; 312 int mdpth; 313 314 if (*line == '\0' || *line == '#') 315 continue; 316 317 ++testno; 318 if (sscanf(line, "%d %d %d %d %d%n", 319 &ntlsa, &ncert, &noncheck, &want, &want_depth, &off) != 5 320 || !allws(line + off)) { 321 TEST_error("Malformed line for test %d", testno); 322 return 0; 323 } 324 325 if (!TEST_ptr(ssl = SSL_new(ctx))) 326 return 0; 327 SSL_set_connect_state(ssl); 328 if (SSL_dane_enable(ssl, base_name) <= 0) { 329 SSL_free(ssl); 330 return 0; 331 } 332 if (noncheck) 333 SSL_dane_set_flags(ssl, DANE_FLAG_NO_DANE_EE_NAMECHECKS); 334 335 for (i = 0; i < ntlsa; ++i) { 336 if ((line = read_to_eol(f)) == NULL || !tlsa_import_rr(ssl, line)) { 337 SSL_free(ssl); 338 return 0; 339 } 340 } 341 342 /* Don't report old news */ 343 ERR_clear_error(); 344 if (!TEST_ptr(chain = load_chain(f, ncert))) { 345 SSL_free(ssl); 346 return 0; 347 } 348 349 ok = verify_chain(ssl, chain); 350 sk_X509_pop_free(chain, X509_free); 351 err = SSL_get_verify_result(ssl); 352 /* 353 * Peek under the hood, normally TLSA match data is hidden when 354 * verification fails, we can obtain any suppressed data by setting the 355 * verification result to X509_V_OK before looking. 356 */ 357 SSL_set_verify_result(ssl, X509_V_OK); 358 mdpth = SSL_get0_dane_authority(ssl, NULL, NULL); 359 /* Not needed any more, but lead by example and put the error back. */ 360 SSL_set_verify_result(ssl, err); 361 SSL_free(ssl); 362 363 if (!TEST_int_eq(err, want)) { 364 if (want == X509_V_OK) 365 TEST_info("Verification failure in test %d: %d=%s", 366 testno, err, X509_verify_cert_error_string(err)); 367 else 368 TEST_info("Unexpected error in test %d", testno); 369 ret = 0; 370 continue; 371 } 372 if (!TEST_false(want == 0 && ok == 0)) { 373 TEST_info("Verification failure in test %d: ok=0", testno); 374 ret = 0; 375 continue; 376 } 377 if (!TEST_int_eq(mdpth, want_depth)) { 378 TEST_info("In test test %d", testno); 379 ret = 0; 380 } 381 } 382 ERR_clear_error(); 383 384 return ret; 385 } 386 387 static int run_tlsatest(void) 388 { 389 SSL_CTX *ctx = NULL; 390 BIO *f = NULL; 391 int ret = 0; 392 393 if (!TEST_ptr(f = BIO_new_file(tlsafile, "r")) 394 || !TEST_ptr(ctx = SSL_CTX_new(TLS_client_method())) 395 || !TEST_int_gt(SSL_CTX_dane_enable(ctx), 0) 396 || !TEST_true(SSL_CTX_load_verify_locations(ctx, CAfile, NULL)) 397 || !TEST_int_gt(SSL_CTX_dane_mtype_set(ctx, EVP_sha512(), 2, 1), 398 0) 399 || !TEST_int_gt(SSL_CTX_dane_mtype_set(ctx, EVP_sha256(), 1, 2), 400 0) 401 || !TEST_int_gt(test_tlsafile(ctx, basedomain, f, tlsafile), 0)) 402 goto end; 403 ret = 1; 404 405 end: 406 BIO_free(f); 407 SSL_CTX_free(ctx); 408 409 return ret; 410 } 411 412 int setup_tests(void) 413 { 414 if (!TEST_ptr(basedomain = test_get_argument(0)) 415 || !TEST_ptr(CAfile = test_get_argument(1)) 416 || !TEST_ptr(tlsafile = test_get_argument(2))) { 417 TEST_error("Usage error: danetest basedomain CAfile tlsafile"); 418 return 0; 419 } 420 421 ADD_TEST(run_tlsatest); 422 return 1; 423 } 424 425 #include "internal/dane.h" 426 427 static void store_ctx_dane_init(X509_STORE_CTX *store_ctx, SSL *ssl) 428 { 429 X509_STORE_CTX_set0_dane(store_ctx, SSL_get0_dane(ssl)); 430 } 431
Indexes created Sat Feb 28 05:31:39 UTC 2026