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7571292eac
boringssl/ssl/test/bssl_shim.cc
Adam Langley 7571292eac Extended master secret support. 
This change implements support for the extended master secret. See
https://tools.ietf.org/html/draft-ietf-tls-session-hash-01
https://secure-resumption.com/

Change-Id: Ifc7327763149ab0894b4f1d48cdc35e0f1093b93
Reviewed-on: https://boringssl-review.googlesource.com/1930
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
2014-10-24 21:19:44 +00:00

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17 KiB
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/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <openssl/base.h>
#if !defined(OPENSSL_WINDOWS)
#include <arpa/inet.h>
#include <netinet/in.h>
#include <signal.h>
#include <sys/socket.h>
#include <unistd.h>
#endif
#include <sys/types.h>
#include <openssl/bio.h>
#include <openssl/bytestring.h>
#include <openssl/ssl.h>
#include "async_bio.h"
#include "packeted_bio.h"
#include "test_config.h"
static int usage(const char *program) {
fprintf(stderr, "Usage: %s [flags...]\n",
program);
return 1;
}
static int g_ex_data_index = 0;
static void SetConfigPtr(SSL *ssl, const TestConfig *config) {
SSL_set_ex_data(ssl, g_ex_data_index, (void *)config);
}
static const TestConfig *GetConfigPtr(SSL *ssl) {
return (const TestConfig *)SSL_get_ex_data(ssl, g_ex_data_index);
}
static EVP_PKEY *LoadPrivateKey(const std::string &file) {
BIO *bio = BIO_new(BIO_s_file());
if (bio == NULL) {
return NULL;
}
if (!BIO_read_filename(bio, file.c_str())) {
BIO_free(bio);
return NULL;
}
EVP_PKEY *pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL);
BIO_free(bio);
return pkey;
}
static int early_callback_called = 0;
static int select_certificate_callback(const struct ssl_early_callback_ctx *ctx) {
early_callback_called = 1;
const TestConfig *config = GetConfigPtr(ctx->ssl);
if (config->expected_server_name.empty()) {
return 1;
}
const uint8_t *extension_data;
size_t extension_len;
CBS extension, server_name_list, host_name;
uint8_t name_type;
if (!SSL_early_callback_ctx_extension_get(ctx, TLSEXT_TYPE_server_name,
&extension_data,
&extension_len)) {
fprintf(stderr, "Could not find server_name extension.\n");
return -1;
}
CBS_init(&extension, extension_data, extension_len);
if (!CBS_get_u16_length_prefixed(&extension, &server_name_list) ||
CBS_len(&extension) != 0 ||
!CBS_get_u8(&server_name_list, &name_type) ||
name_type != TLSEXT_NAMETYPE_host_name ||
!CBS_get_u16_length_prefixed(&server_name_list, &host_name) ||
CBS_len(&server_name_list) != 0) {
fprintf(stderr, "Could not decode server_name extension.\n");
return -1;
}
if (!CBS_mem_equal(&host_name,
(const uint8_t*)config->expected_server_name.data(),
config->expected_server_name.size())) {
fprintf(stderr, "Server name mismatch.\n");
}
return 1;
}
static int skip_verify(int preverify_ok, X509_STORE_CTX *store_ctx) {
return 1;
}
static int next_protos_advertised_callback(SSL *ssl,
const uint8_t **out,
unsigned int *out_len,
void *arg) {
const TestConfig *config = GetConfigPtr(ssl);
if (config->advertise_npn.empty())
return SSL_TLSEXT_ERR_NOACK;
*out = (const uint8_t*)config->advertise_npn.data();
*out_len = config->advertise_npn.size();
return SSL_TLSEXT_ERR_OK;
}
static int next_proto_select_callback(SSL* ssl,
uint8_t** out,
uint8_t* outlen,
const uint8_t* in,
unsigned inlen,
void* arg) {
const TestConfig *config = GetConfigPtr(ssl);
if (config->select_next_proto.empty())
return SSL_TLSEXT_ERR_NOACK;
*out = (uint8_t*)config->select_next_proto.data();
*outlen = config->select_next_proto.size();
return SSL_TLSEXT_ERR_OK;
}
static int alpn_select_callback(SSL* ssl,
const uint8_t** out,
uint8_t* outlen,
const uint8_t* in,
unsigned inlen,
void* arg) {
const TestConfig *config = GetConfigPtr(ssl);
if (config->select_alpn.empty())
return SSL_TLSEXT_ERR_NOACK;
if (!config->expected_advertised_alpn.empty() &&
(config->expected_advertised_alpn.size() != inlen ||
memcmp(config->expected_advertised_alpn.data(),
in, inlen) != 0)) {
fprintf(stderr, "bad ALPN select callback inputs\n");
exit(1);
}
*out = (const uint8_t*)config->select_alpn.data();
*outlen = config->select_alpn.size();
return SSL_TLSEXT_ERR_OK;
}
static int cookie_generate_callback(SSL *ssl, uint8_t *cookie, size_t *cookie_len) {
*cookie_len = 32;
memset(cookie, 42, *cookie_len);
return 1;
}
static int cookie_verify_callback(SSL *ssl, const uint8_t *cookie, size_t cookie_len) {
if (cookie_len != 32) {
fprintf(stderr, "Cookie length mismatch.\n");
return 0;
}
for (size_t i = 0; i < cookie_len; i++) {
if (cookie[i] != 42) {
fprintf(stderr, "Cookie mismatch.\n");
return 0;
}
}
return 1;
}
static SSL_CTX *setup_ctx(const TestConfig *config) {
SSL_CTX *ssl_ctx = NULL;
DH *dh = NULL;
const SSL_METHOD *method;
if (config->is_dtls) {
// TODO(davidben): Get DTLS 1.2 working and test the version negotiation
// codepath. This doesn't currently work because
// - Session resumption is broken: https://crbug.com/403378
// - DTLS hasn't been updated for EVP_AEAD.
if (config->is_server) {
method = DTLSv1_server_method();
} else {
method = DTLSv1_client_method();
}
} else {
if (config->is_server) {
method = SSLv23_server_method();
} else {
method = SSLv23_client_method();
}
}
ssl_ctx = SSL_CTX_new(method);
if (ssl_ctx == NULL) {
goto err;
}
if (config->is_dtls) {
// DTLS needs read-ahead to function on a datagram BIO.
//
// TODO(davidben): this should not be necessary. DTLS code should only
// expect a datagram BIO.
SSL_CTX_set_read_ahead(ssl_ctx, 1);
}
if (!SSL_CTX_set_ecdh_auto(ssl_ctx, 1)) {
goto err;
}
if (!SSL_CTX_set_cipher_list(ssl_ctx, "ALL")) {
goto err;
}
dh = DH_get_2048_256(NULL);
if (!SSL_CTX_set_tmp_dh(ssl_ctx, dh)) {
goto err;
}
SSL_CTX_set_session_cache_mode(ssl_ctx, SSL_SESS_CACHE_BOTH);
ssl_ctx->select_certificate_cb = select_certificate_callback;
SSL_CTX_set_next_protos_advertised_cb(
ssl_ctx, next_protos_advertised_callback, NULL);
if (!config->select_next_proto.empty()) {
SSL_CTX_set_next_proto_select_cb(ssl_ctx, next_proto_select_callback, NULL);
}
if (!config->select_alpn.empty()) {
SSL_CTX_set_alpn_select_cb(ssl_ctx, alpn_select_callback, NULL);
}
SSL_CTX_set_cookie_generate_cb(ssl_ctx, cookie_generate_callback);
SSL_CTX_set_cookie_verify_cb(ssl_ctx, cookie_verify_callback);
ssl_ctx->tlsext_channel_id_enabled_new = 1;
DH_free(dh);
return ssl_ctx;
err:
if (dh != NULL) {
DH_free(dh);
}
if (ssl_ctx != NULL) {
SSL_CTX_free(ssl_ctx);
}
return NULL;
}
static int retry_async(SSL *ssl, int ret, BIO *bio) {
// No error; don't retry.
if (ret >= 0) {
return 0;
}
// See if we needed to read or write more. If so, allow one byte through on
// the appropriate end to maximally stress the state machine.
int err = SSL_get_error(ssl, ret);
if (err == SSL_ERROR_WANT_READ) {
async_bio_allow_read(bio, 1);
return 1;
} else if (err == SSL_ERROR_WANT_WRITE) {
async_bio_allow_write(bio, 1);
return 1;
}
return 0;
}
static int do_exchange(SSL_SESSION **out_session,
SSL_CTX *ssl_ctx,
const TestConfig *config,
bool is_resume,
int fd,
SSL_SESSION *session) {
early_callback_called = 0;
SSL *ssl = SSL_new(ssl_ctx);
if (ssl == NULL) {
BIO_print_errors_fp(stdout);
return 1;
}
SetConfigPtr(ssl, config);
if (config->fallback_scsv) {
if (!SSL_enable_fallback_scsv(ssl)) {
BIO_print_errors_fp(stdout);
return 1;
}
}
if (!config->key_file.empty()) {
if (!SSL_use_PrivateKey_file(ssl, config->key_file.c_str(),
SSL_FILETYPE_PEM)) {
BIO_print_errors_fp(stdout);
return 1;
}
}
if (!config->cert_file.empty()) {
if (!SSL_use_certificate_file(ssl, config->cert_file.c_str(),
SSL_FILETYPE_PEM)) {
BIO_print_errors_fp(stdout);
return 1;
}
}
if (config->require_any_client_certificate) {
SSL_set_verify(ssl, SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
skip_verify);
}
if (config->false_start) {
SSL_set_mode(ssl, SSL_MODE_HANDSHAKE_CUTTHROUGH);
}
if (config->cbc_record_splitting) {
SSL_set_mode(ssl, SSL_MODE_CBC_RECORD_SPLITTING);
}
if (config->partial_write) {
SSL_set_mode(ssl, SSL_MODE_ENABLE_PARTIAL_WRITE);
}
if (config->no_tls12) {
SSL_set_options(ssl, SSL_OP_NO_TLSv1_2);
}
if (config->no_tls11) {
SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
}
if (config->no_tls1) {
SSL_set_options(ssl, SSL_OP_NO_TLSv1);
}
if (config->no_ssl3) {
SSL_set_options(ssl, SSL_OP_NO_SSLv3);
}
if (config->cookie_exchange) {
SSL_set_options(ssl, SSL_OP_COOKIE_EXCHANGE);
}
if (config->tls_d5_bug) {
SSL_set_options(ssl, SSL_OP_TLS_D5_BUG);
}
if (!config->expected_channel_id.empty()) {
SSL_enable_tls_channel_id(ssl);
}
if (!config->send_channel_id.empty()) {
EVP_PKEY *pkey = LoadPrivateKey(config->send_channel_id);
if (pkey == NULL) {
BIO_print_errors_fp(stdout);
return 1;
}
SSL_enable_tls_channel_id(ssl);
if (!SSL_set1_tls_channel_id(ssl, pkey)) {
EVP_PKEY_free(pkey);
BIO_print_errors_fp(stdout);
return 1;
}
EVP_PKEY_free(pkey);
}
if (!config->host_name.empty()) {
SSL_set_tlsext_host_name(ssl, config->host_name.c_str());
}
if (!config->advertise_alpn.empty()) {
SSL_set_alpn_protos(ssl, (const uint8_t *)config->advertise_alpn.data(),
config->advertise_alpn.size());
}
BIO *bio = BIO_new_fd(fd, 1 /* take ownership */);
if (bio == NULL) {
BIO_print_errors_fp(stdout);
return 1;
}
if (config->is_dtls) {
BIO *packeted = packeted_bio_create();
BIO_push(packeted, bio);
bio = packeted;
}
if (config->async) {
BIO *async =
config->is_dtls ? async_bio_create_datagram() : async_bio_create();
BIO_push(async, bio);
bio = async;
}
SSL_set_bio(ssl, bio, bio);
if (session != NULL) {
if (SSL_set_session(ssl, session) != 1) {
fprintf(stderr, "failed to set session\n");
return 2;
}
}
int ret;
do {
if (config->is_server) {
ret = SSL_accept(ssl);
} else {
ret = SSL_connect(ssl);
}
} while (config->async && retry_async(ssl, ret, bio));
if (ret != 1) {
SSL_free(ssl);
BIO_print_errors_fp(stdout);
return 2;
}
if (is_resume && (SSL_session_reused(ssl) == config->expect_session_miss)) {
fprintf(stderr, "session was%s reused\n",
SSL_session_reused(ssl) ? "" : " not");
return 2;
}
if (!config->expected_server_name.empty()) {
const char *server_name =
SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (server_name != config->expected_server_name) {
fprintf(stderr, "servername mismatch (got %s; want %s)\n",
server_name, config->expected_server_name.c_str());
return 2;
}
if (!early_callback_called) {
fprintf(stderr, "early callback not called\n");
return 2;
}
}
if (!config->expected_certificate_types.empty()) {
uint8_t *certificate_types;
int num_certificate_types =
SSL_get0_certificate_types(ssl, &certificate_types);
if (num_certificate_types !=
(int)config->expected_certificate_types.size() ||
memcmp(certificate_types,
config->expected_certificate_types.data(),
num_certificate_types) != 0) {
fprintf(stderr, "certificate types mismatch\n");
return 2;
}
}
if (!config->expected_next_proto.empty()) {
const uint8_t *next_proto;
unsigned next_proto_len;
SSL_get0_next_proto_negotiated(ssl, &next_proto, &next_proto_len);
if (next_proto_len != config->expected_next_proto.size() ||
memcmp(next_proto, config->expected_next_proto.data(),
next_proto_len) != 0) {
fprintf(stderr, "negotiated next proto mismatch\n");
return 2;
}
}
if (!config->expected_alpn.empty()) {
const uint8_t *alpn_proto;
unsigned alpn_proto_len;
SSL_get0_alpn_selected(ssl, &alpn_proto, &alpn_proto_len);
if (alpn_proto_len != config->expected_alpn.size() ||
memcmp(alpn_proto, config->expected_alpn.data(),
alpn_proto_len) != 0) {
fprintf(stderr, "negotiated alpn proto mismatch\n");
return 2;
}
}
if (!config->expected_channel_id.empty()) {
uint8_t channel_id[64];
if (!SSL_get_tls_channel_id(ssl, channel_id, sizeof(channel_id))) {
fprintf(stderr, "no channel id negotiated\n");
return 2;
}
if (config->expected_channel_id.size() != 64 ||
memcmp(config->expected_channel_id.data(),
channel_id, 64) != 0) {
fprintf(stderr, "channel id mismatch\n");
return 2;
}
}
if (config->expect_extended_master_secret) {
if (!ssl->session->extended_master_secret) {
fprintf(stderr, "No EMS for session when expected");
return 2;
}
}
if (config->write_different_record_sizes) {
if (config->is_dtls) {
fprintf(stderr, "write_different_record_sizes not supported for DTLS\n");
return 6;
}
// This mode writes a number of different record sizes in an attempt to
// trip up the CBC record splitting code.
uint8_t buf[32769];
memset(buf, 0x42, sizeof(buf));
static const size_t kRecordSizes[] = {
0, 1, 255, 256, 257, 16383, 16384, 16385, 32767, 32768, 32769};
for (size_t i = 0; i < sizeof(kRecordSizes) / sizeof(kRecordSizes[0]);
i++) {
int w;
const size_t len = kRecordSizes[i];
size_t off = 0;
if (len > sizeof(buf)) {
fprintf(stderr, "Bad kRecordSizes value.\n");
return 5;
}
do {
w = SSL_write(ssl, buf + off, len - off);
if (w > 0) {
off += (size_t) w;
}
} while ((config->async && retry_async(ssl, w, bio)) ||
(w > 0 && off < len));
if (w < 0 || off != len) {
SSL_free(ssl);
BIO_print_errors_fp(stdout);
return 4;
}
}
} else {
if (config->shim_writes_first) {
int w;
do {
w = SSL_write(ssl, "hello", 5);
} while (config->async && retry_async(ssl, w, bio));
}
for (;;) {
uint8_t buf[512];
int n;
do {
n = SSL_read(ssl, buf, sizeof(buf));
} while (config->async && retry_async(ssl, n, bio));
if (n < 0) {
SSL_free(ssl);
BIO_print_errors_fp(stdout);
return 3;
} else if (n == 0) {
break;
} else {
for (int i = 0; i < n; i++) {
buf[i] ^= 0xff;
}
int w;
do {
w = SSL_write(ssl, buf, n);
} while (config->async && retry_async(ssl, w, bio));
if (w != n) {
SSL_free(ssl);
BIO_print_errors_fp(stdout);
return 4;
}
}
}
}
if (out_session) {
*out_session = SSL_get1_session(ssl);
}
SSL_shutdown(ssl);
SSL_free(ssl);
return 0;
}
int main(int argc, char **argv) {
#if !defined(OPENSSL_WINDOWS)
signal(SIGPIPE, SIG_IGN);
#endif
if (!SSL_library_init()) {
return 1;
}
g_ex_data_index = SSL_get_ex_new_index(0, NULL, NULL, NULL, NULL);
TestConfig config;
if (!ParseConfig(argc - 1, argv + 1, &config)) {
return usage(argv[0]);
}
SSL_CTX *ssl_ctx = setup_ctx(&config);
if (ssl_ctx == NULL) {
BIO_print_errors_fp(stdout);
return 1;
}
SSL_SESSION *session = NULL;
int ret = do_exchange(&session,
ssl_ctx, &config,
false /* is_resume */,
3 /* fd */, NULL /* session */);
if (ret != 0) {
goto out;
}
if (config.resume) {
ret = do_exchange(NULL,
ssl_ctx, &config,
true /* is_resume */,
4 /* fd */,
config.is_server ? NULL : session);
if (ret != 0) {
goto out;
}
}
ret = 0;
out:
SSL_SESSION_free(session);
SSL_CTX_free(ssl_ctx);
return ret;
}
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