|  | /* | 
|  | * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. | 
|  | * | 
|  | * Licensed under the Apache License 2.0 (the "License").  You may not use | 
|  | * this file except in compliance with the License.  You can obtain a copy | 
|  | * in the file LICENSE in the source distribution or at | 
|  | * https://www.openssl.org/source/license.html | 
|  | */ | 
|  |  | 
|  | #include <stdio.h> | 
|  | #include <string.h> | 
|  | #include <ctype.h> | 
|  | #include <limits.h> | 
|  | #include <errno.h> | 
|  |  | 
|  | #include <openssl/crypto.h> | 
|  | #include <openssl/evp.h> | 
|  | #include <openssl/x509.h> | 
|  | #include <openssl/ssl.h> | 
|  | #include <openssl/err.h> | 
|  | #include <openssl/conf.h> | 
|  | #ifndef OPENSSL_NO_ENGINE | 
|  | # include <openssl/engine.h> | 
|  | #endif | 
|  | #include "testutil.h" | 
|  |  | 
|  | #include "internal/nelem.h" | 
|  |  | 
|  | #define _UC(c) ((unsigned char)(c)) | 
|  |  | 
|  | static const char *basedomain; | 
|  | static const char *CAfile; | 
|  | static const char *tlsafile; | 
|  |  | 
|  | /* | 
|  | * Forward declaration, of function that uses internal interfaces, from headers | 
|  | * included at the end of this module. | 
|  | */ | 
|  | static void store_ctx_dane_init(X509_STORE_CTX *, SSL *); | 
|  |  | 
|  | static int saved_errno; | 
|  |  | 
|  | static void save_errno(void) | 
|  | { | 
|  | saved_errno = errno; | 
|  | } | 
|  |  | 
|  | static int restore_errno(void) | 
|  | { | 
|  | int ret = errno; | 
|  | errno = saved_errno; | 
|  | return ret; | 
|  | } | 
|  |  | 
|  | static int verify_chain(SSL *ssl, STACK_OF(X509) *chain) | 
|  | { | 
|  | X509_STORE_CTX *store_ctx = NULL; | 
|  | SSL_CTX *ssl_ctx = NULL; | 
|  | X509_STORE *store = NULL; | 
|  | int ret = 0; | 
|  | int store_ctx_idx = SSL_get_ex_data_X509_STORE_CTX_idx(); | 
|  |  | 
|  | if (!TEST_ptr(store_ctx = X509_STORE_CTX_new()) | 
|  | || !TEST_ptr(ssl_ctx = SSL_get_SSL_CTX(ssl)) | 
|  | || !TEST_ptr(store = SSL_CTX_get_cert_store(ssl_ctx)) | 
|  | || !TEST_true(X509_STORE_CTX_init(store_ctx, store, NULL, chain)) | 
|  | || !TEST_true(X509_STORE_CTX_set_ex_data(store_ctx, store_ctx_idx, | 
|  | ssl))) | 
|  | goto end; | 
|  |  | 
|  | X509_STORE_CTX_set_default(store_ctx, SSL_is_server(ssl) | 
|  | ? "ssl_client" : "ssl_server"); | 
|  | X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(store_ctx), | 
|  | SSL_get0_param(ssl)); | 
|  | store_ctx_dane_init(store_ctx, ssl); | 
|  |  | 
|  | if (SSL_get_verify_callback(ssl) != NULL) | 
|  | X509_STORE_CTX_set_verify_cb(store_ctx, SSL_get_verify_callback(ssl)); | 
|  |  | 
|  | /* Mask "internal failures" (-1) from our return value. */ | 
|  | if (!TEST_int_ge(ret = X509_STORE_CTX_verify(store_ctx), 0)) | 
|  | ret = 0; | 
|  |  | 
|  | SSL_set_verify_result(ssl, X509_STORE_CTX_get_error(store_ctx)); | 
|  |  | 
|  | end: | 
|  | X509_STORE_CTX_free(store_ctx); | 
|  | return ret; | 
|  | } | 
|  |  | 
|  | static STACK_OF(X509) *load_chain(BIO *fp, int nelem) | 
|  | { | 
|  | int count; | 
|  | char *name = 0; | 
|  | char *header = 0; | 
|  | unsigned char *data = 0; | 
|  | long len; | 
|  | char *errtype = 0; /* if error: cert or pkey? */ | 
|  | STACK_OF(X509) *chain; | 
|  | typedef X509 *(*d2i_X509_t)(X509 **, const unsigned char **, long); | 
|  |  | 
|  | if (!TEST_ptr(chain = sk_X509_new_null())) | 
|  | goto err; | 
|  |  | 
|  | for (count = 0; | 
|  | count < nelem && errtype == 0 | 
|  | && PEM_read_bio(fp, &name, &header, &data, &len) == 1; | 
|  | ++count) { | 
|  | if (strcmp(name, PEM_STRING_X509) == 0 | 
|  | || strcmp(name, PEM_STRING_X509_TRUSTED) == 0 | 
|  | || strcmp(name, PEM_STRING_X509_OLD) == 0) { | 
|  | d2i_X509_t d = strcmp(name, PEM_STRING_X509_TRUSTED) != 0 | 
|  | ? d2i_X509_AUX : d2i_X509; | 
|  | X509 *cert; | 
|  | const unsigned char *p = data; | 
|  |  | 
|  | if (!TEST_ptr(cert = d(0, &p, len)) | 
|  | || !TEST_long_eq(p - data, len)) { | 
|  | TEST_info("Certificate parsing error"); | 
|  | goto err; | 
|  | } | 
|  |  | 
|  | if (!TEST_true(sk_X509_push(chain, cert))) | 
|  | goto err; | 
|  | } else { | 
|  | TEST_info("Unknown chain file object %s", name); | 
|  | goto err; | 
|  | } | 
|  |  | 
|  | OPENSSL_free(name); | 
|  | OPENSSL_free(header); | 
|  | OPENSSL_free(data); | 
|  | name = header = NULL; | 
|  | data = NULL; | 
|  | } | 
|  |  | 
|  | if (count == nelem) { | 
|  | ERR_clear_error(); | 
|  | return chain; | 
|  | } | 
|  |  | 
|  | err: | 
|  | OPENSSL_free(name); | 
|  | OPENSSL_free(header); | 
|  | OPENSSL_free(data); | 
|  | sk_X509_pop_free(chain, X509_free); | 
|  | return NULL; | 
|  | } | 
|  |  | 
|  | static char *read_to_eol(BIO *f) | 
|  | { | 
|  | static char buf[1024]; | 
|  | int n; | 
|  |  | 
|  | if (!BIO_gets(f, buf, sizeof(buf))) | 
|  | return NULL; | 
|  |  | 
|  | n = strlen(buf); | 
|  | if (buf[n - 1] != '\n') { | 
|  | if (n + 1 == sizeof(buf)) | 
|  | TEST_error("input too long"); | 
|  | else | 
|  | TEST_error("EOF before newline"); | 
|  | return NULL; | 
|  | } | 
|  |  | 
|  | /* Trim trailing whitespace */ | 
|  | while (n > 0 && isspace(_UC(buf[n - 1]))) | 
|  | buf[--n] = '\0'; | 
|  |  | 
|  | return buf; | 
|  | } | 
|  |  | 
|  | /* | 
|  | * Hex decoder that tolerates optional whitespace | 
|  | */ | 
|  | static ossl_ssize_t hexdecode(const char *in, void *result) | 
|  | { | 
|  | unsigned char **out = (unsigned char **)result; | 
|  | unsigned char *ret; | 
|  | unsigned char *cp; | 
|  | uint8_t byte; | 
|  | int nibble = 0; | 
|  |  | 
|  | if (!TEST_ptr(ret = OPENSSL_malloc(strlen(in) / 2))) | 
|  | return -1; | 
|  | cp = ret; | 
|  |  | 
|  | for (byte = 0; *in; ++in) { | 
|  | int x; | 
|  |  | 
|  | if (isspace(_UC(*in))) | 
|  | continue; | 
|  | x = OPENSSL_hexchar2int(*in); | 
|  | if (x < 0) { | 
|  | OPENSSL_free(ret); | 
|  | return 0; | 
|  | } | 
|  | byte |= (char)x; | 
|  | if ((nibble ^= 1) == 0) { | 
|  | *cp++ = byte; | 
|  | byte = 0; | 
|  | } else { | 
|  | byte <<= 4; | 
|  | } | 
|  | } | 
|  | if (nibble != 0) { | 
|  | OPENSSL_free(ret); | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | return cp - (*out = ret); | 
|  | } | 
|  |  | 
|  | static ossl_ssize_t checked_uint8(const char *in, void *out) | 
|  | { | 
|  | uint8_t *result = (uint8_t *)out; | 
|  | const char *cp = in; | 
|  | char *endp; | 
|  | long v; | 
|  | int e; | 
|  |  | 
|  | save_errno(); | 
|  | v = strtol(cp, &endp, 10); | 
|  | e = restore_errno(); | 
|  |  | 
|  | if (((v == LONG_MIN || v == LONG_MAX) && e == ERANGE) || | 
|  | endp == cp || !isspace(_UC(*endp)) || | 
|  | v != (*(uint8_t *)result = (uint8_t) v)) { | 
|  | return -1; | 
|  | } | 
|  | for (cp = endp; isspace(_UC(*cp)); ++cp) | 
|  | continue; | 
|  | return cp - in; | 
|  | } | 
|  |  | 
|  | struct tlsa_field { | 
|  | void *var; | 
|  | const char *name; | 
|  | ossl_ssize_t (*parser)(const char *, void *); | 
|  | }; | 
|  |  | 
|  | static int tlsa_import_rr(SSL *ssl, const char *rrdata) | 
|  | { | 
|  | static uint8_t usage; | 
|  | static uint8_t selector; | 
|  | static uint8_t mtype; | 
|  | static unsigned char *data = NULL; | 
|  | static struct tlsa_field tlsa_fields[] = { | 
|  | { &usage, "usage", checked_uint8 }, | 
|  | { &selector, "selector", checked_uint8 }, | 
|  | { &mtype, "mtype", checked_uint8 }, | 
|  | { &data, "data", hexdecode }, | 
|  | { NULL, } | 
|  | }; | 
|  | int ret; | 
|  | struct tlsa_field *f; | 
|  | const char *cp = rrdata; | 
|  | ossl_ssize_t len = 0; | 
|  |  | 
|  | for (f = tlsa_fields; f->var; ++f) { | 
|  | if ((len = f->parser(cp += len, f->var)) <= 0) { | 
|  | TEST_info("bad TLSA %s field in: %s", f->name, rrdata); | 
|  | return 0; | 
|  | } | 
|  | } | 
|  |  | 
|  | ret = SSL_dane_tlsa_add(ssl, usage, selector, mtype, data, len); | 
|  | OPENSSL_free(data); | 
|  | if (ret == 0) { | 
|  | TEST_info("unusable TLSA rrdata: %s", rrdata); | 
|  | return 0; | 
|  | } | 
|  | if (ret < 0) { | 
|  | TEST_info("error loading TLSA rrdata: %s", rrdata); | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | return ret; | 
|  | } | 
|  |  | 
|  | static int allws(const char *cp) | 
|  | { | 
|  | while (*cp) | 
|  | if (!isspace(_UC(*cp++))) | 
|  | return 0; | 
|  | return 1; | 
|  | } | 
|  |  | 
|  | static int test_tlsafile(SSL_CTX *ctx, const char *base_name, | 
|  | BIO *f, const char *path) | 
|  | { | 
|  | char *line; | 
|  | int testno = 0; | 
|  | int ret = 1; | 
|  | SSL *ssl; | 
|  |  | 
|  | while (ret > 0 && (line = read_to_eol(f)) != NULL) { | 
|  | STACK_OF(X509) *chain; | 
|  | int ntlsa; | 
|  | int ncert; | 
|  | int noncheck; | 
|  | int want; | 
|  | int want_depth; | 
|  | int off; | 
|  | int i; | 
|  | int ok; | 
|  | int err; | 
|  | int mdpth; | 
|  |  | 
|  | if (*line == '\0' || *line == '#') | 
|  | continue; | 
|  |  | 
|  | ++testno; | 
|  | if (sscanf(line, "%d %d %d %d %d%n", | 
|  | &ntlsa, &ncert, &noncheck, &want, &want_depth, &off) != 5 | 
|  | || !allws(line + off)) { | 
|  | TEST_error("Malformed line for test %d", testno); | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | if (!TEST_ptr(ssl = SSL_new(ctx))) | 
|  | return 0; | 
|  | SSL_set_connect_state(ssl); | 
|  | if (SSL_dane_enable(ssl, base_name) <= 0) { | 
|  | SSL_free(ssl); | 
|  | return 0; | 
|  | } | 
|  | if (noncheck) | 
|  | SSL_dane_set_flags(ssl, DANE_FLAG_NO_DANE_EE_NAMECHECKS); | 
|  |  | 
|  | for (i = 0; i < ntlsa; ++i) { | 
|  | if ((line = read_to_eol(f)) == NULL || !tlsa_import_rr(ssl, line)) { | 
|  | SSL_free(ssl); | 
|  | return 0; | 
|  | } | 
|  | } | 
|  |  | 
|  | /* Don't report old news */ | 
|  | ERR_clear_error(); | 
|  | if (!TEST_ptr(chain = load_chain(f, ncert))) { | 
|  | SSL_free(ssl); | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | ok = verify_chain(ssl, chain); | 
|  | sk_X509_pop_free(chain, X509_free); | 
|  | err = SSL_get_verify_result(ssl); | 
|  | /* | 
|  | * Peek under the hood, normally TLSA match data is hidden when | 
|  | * verification fails, we can obtain any suppressed data by setting the | 
|  | * verification result to X509_V_OK before looking. | 
|  | */ | 
|  | SSL_set_verify_result(ssl, X509_V_OK); | 
|  | mdpth = SSL_get0_dane_authority(ssl, NULL, NULL); | 
|  | /* Not needed any more, but lead by example and put the error back. */ | 
|  | SSL_set_verify_result(ssl, err); | 
|  | SSL_free(ssl); | 
|  |  | 
|  | if (!TEST_int_eq(err, want)) { | 
|  | if (want == X509_V_OK) | 
|  | TEST_info("Verification failure in test %d: %d=%s", | 
|  | testno, err, X509_verify_cert_error_string(err)); | 
|  | else | 
|  | TEST_info("Unexpected error in test %d", testno); | 
|  | ret = 0; | 
|  | continue; | 
|  | } | 
|  | if (!TEST_false(want == 0 && ok == 0)) { | 
|  | TEST_info("Verification failure in test %d: ok=0", testno); | 
|  | ret = 0; | 
|  | continue; | 
|  | } | 
|  | if (!TEST_int_eq(mdpth, want_depth)) { | 
|  | TEST_info("In test test %d", testno); | 
|  | ret = 0; | 
|  | } | 
|  | } | 
|  | ERR_clear_error(); | 
|  |  | 
|  | return ret; | 
|  | } | 
|  |  | 
|  | static int run_tlsatest(void) | 
|  | { | 
|  | SSL_CTX *ctx = NULL; | 
|  | BIO *f = NULL; | 
|  | int ret = 0; | 
|  |  | 
|  | if (!TEST_ptr(f = BIO_new_file(tlsafile, "r")) | 
|  | || !TEST_ptr(ctx = SSL_CTX_new(TLS_client_method())) | 
|  | || !TEST_int_gt(SSL_CTX_dane_enable(ctx), 0) | 
|  | || !TEST_true(SSL_CTX_load_verify_file(ctx, CAfile)) | 
|  | || !TEST_int_gt(SSL_CTX_dane_mtype_set(ctx, EVP_sha512(), 2, 1), 0) | 
|  | || !TEST_int_gt(SSL_CTX_dane_mtype_set(ctx, EVP_sha256(), 1, 2), 0) | 
|  | || !TEST_int_gt(test_tlsafile(ctx, basedomain, f, tlsafile), 0)) | 
|  | goto end; | 
|  | ret = 1; | 
|  |  | 
|  | end: | 
|  | BIO_free(f); | 
|  | SSL_CTX_free(ctx); | 
|  |  | 
|  | return ret; | 
|  | } | 
|  |  | 
|  | OPT_TEST_DECLARE_USAGE("basedomain CAfile tlsafile\n") | 
|  |  | 
|  | int setup_tests(void) | 
|  | { | 
|  | if (!test_skip_common_options()) { | 
|  | TEST_error("Error parsing test options\n"); | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | if (!TEST_ptr(basedomain = test_get_argument(0)) | 
|  | || !TEST_ptr(CAfile = test_get_argument(1)) | 
|  | || !TEST_ptr(tlsafile = test_get_argument(2))) | 
|  | return 0; | 
|  |  | 
|  | ADD_TEST(run_tlsatest); | 
|  | return 1; | 
|  | } | 
|  |  | 
|  | #include "internal/dane.h" | 
|  |  | 
|  | static void store_ctx_dane_init(X509_STORE_CTX *store_ctx, SSL *ssl) | 
|  | { | 
|  | X509_STORE_CTX_set0_dane(store_ctx, SSL_get0_dane(ssl)); | 
|  | } |