A local copy of OpenSSL from GitHub
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/*
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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
*/
#if !defined(__STDC_FORMAT_MACROS)
#define __STDC_FORMAT_MACROS
#endif
#include "packeted_bio.h"
#include <openssl/e_os2.h>
#if !defined(OPENSSL_SYS_WINDOWS)
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <signal.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <unistd.h>
#else
#include <io.h>
OPENSSL_MSVC_PRAGMA(warning(push, 3))
#include <winsock2.h>
#include <ws2tcpip.h>
OPENSSL_MSVC_PRAGMA(warning(pop))
OPENSSL_MSVC_PRAGMA(comment(lib, "Ws2_32.lib"))
#endif
#include <assert.h>
#include <inttypes.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/buffer.h>
#include <openssl/bn.h>
#include <openssl/crypto.h>
#include <openssl/dh.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/objects.h>
#include <openssl/rand.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>
#include <memory>
#include <string>
#include <vector>
#include "async_bio.h"
#include "test_config.h"
namespace bssl {
#if !defined(OPENSSL_SYS_WINDOWS)
static int closesocket(int sock) {
return close(sock);
}
static void PrintSocketError(const char *func) {
perror(func);
}
#else
static void PrintSocketError(const char *func) {
fprintf(stderr, "%s: %d\n", func, WSAGetLastError());
}
#endif
static int Usage(const char *program) {
fprintf(stderr, "Usage: %s [flags...]\n", program);
return 1;
}
struct TestState {
// async_bio is async BIO which pauses reads and writes.
BIO *async_bio = nullptr;
// packeted_bio is the packeted BIO which simulates read timeouts.
BIO *packeted_bio = nullptr;
bool cert_ready = false;
bool handshake_done = false;
// private_key is the underlying private key used when testing custom keys.
bssl::UniquePtr<EVP_PKEY> private_key;
bool got_new_session = false;
bssl::UniquePtr<SSL_SESSION> new_session;
bool ticket_decrypt_done = false;
bool alpn_select_done = false;
};
static void TestStateExFree(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int index, long argl, void *argp) {
delete ((TestState *)ptr);
}
static int g_config_index = 0;
static int g_state_index = 0;
static bool SetTestConfig(SSL *ssl, const TestConfig *config) {
return SSL_set_ex_data(ssl, g_config_index, (void *)config) == 1;
}
static const TestConfig *GetTestConfig(const SSL *ssl) {
return (const TestConfig *)SSL_get_ex_data(ssl, g_config_index);
}
static bool SetTestState(SSL *ssl, std::unique_ptr<TestState> state) {
// |SSL_set_ex_data| takes ownership of |state| only on success.
if (SSL_set_ex_data(ssl, g_state_index, state.get()) == 1) {
state.release();
return true;
}
return false;
}
static TestState *GetTestState(const SSL *ssl) {
return (TestState *)SSL_get_ex_data(ssl, g_state_index);
}
static bssl::UniquePtr<X509> LoadCertificate(const std::string &file) {
bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_file()));
if (!bio || !BIO_read_filename(bio.get(), file.c_str())) {
return nullptr;
}
return bssl::UniquePtr<X509>(PEM_read_bio_X509(bio.get(), NULL, NULL, NULL));
}
static bssl::UniquePtr<EVP_PKEY> LoadPrivateKey(const std::string &file) {
bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_file()));
if (!bio || !BIO_read_filename(bio.get(), file.c_str())) {
return nullptr;
}
return bssl::UniquePtr<EVP_PKEY>(
PEM_read_bio_PrivateKey(bio.get(), NULL, NULL, NULL));
}
template<typename T>
struct Free {
void operator()(T *buf) {
free(buf);
}
};
static bool GetCertificate(SSL *ssl, bssl::UniquePtr<X509> *out_x509,
bssl::UniquePtr<EVP_PKEY> *out_pkey) {
const TestConfig *config = GetTestConfig(ssl);
if (!config->key_file.empty()) {
*out_pkey = LoadPrivateKey(config->key_file.c_str());
if (!*out_pkey) {
return false;
}
}
if (!config->cert_file.empty()) {
*out_x509 = LoadCertificate(config->cert_file.c_str());
if (!*out_x509) {
return false;
}
}
return true;
}
static bool InstallCertificate(SSL *ssl) {
bssl::UniquePtr<X509> x509;
bssl::UniquePtr<EVP_PKEY> pkey;
if (!GetCertificate(ssl, &x509, &pkey)) {
return false;
}
if (pkey && !SSL_use_PrivateKey(ssl, pkey.get())) {
return false;
}
if (x509 && !SSL_use_certificate(ssl, x509.get())) {
return false;
}
return true;
}
static int ClientCertCallback(SSL *ssl, X509 **out_x509, EVP_PKEY **out_pkey) {
if (GetTestConfig(ssl)->async && !GetTestState(ssl)->cert_ready) {
return -1;
}
bssl::UniquePtr<X509> x509;
bssl::UniquePtr<EVP_PKEY> pkey;
if (!GetCertificate(ssl, &x509, &pkey)) {
return -1;
}
// Return zero for no certificate.
if (!x509) {
return 0;
}
// Asynchronous private keys are not supported with client_cert_cb.
*out_x509 = x509.release();
*out_pkey = pkey.release();
return 1;
}
static int VerifySucceed(X509_STORE_CTX *store_ctx, void *arg) {
return 1;
}
static int VerifyFail(X509_STORE_CTX *store_ctx, void *arg) {
X509_STORE_CTX_set_error(store_ctx, X509_V_ERR_APPLICATION_VERIFICATION);
return 0;
}
static int NextProtosAdvertisedCallback(SSL *ssl, const uint8_t **out,
unsigned int *out_len, void *arg) {
const TestConfig *config = GetTestConfig(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 NextProtoSelectCallback(SSL* ssl, uint8_t** out, uint8_t* outlen,
const uint8_t* in, unsigned inlen, void* arg) {
const TestConfig *config = GetTestConfig(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 AlpnSelectCallback(SSL* ssl, const uint8_t** out, uint8_t* outlen,
const uint8_t* in, unsigned inlen, void* arg) {
if (GetTestState(ssl)->alpn_select_done) {
fprintf(stderr, "AlpnSelectCallback called after completion.\n");
exit(1);
}
GetTestState(ssl)->alpn_select_done = true;
const TestConfig *config = GetTestConfig(ssl);
if (config->decline_alpn) {
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 unsigned PskClientCallback(SSL *ssl, const char *hint,
char *out_identity,
unsigned max_identity_len,
uint8_t *out_psk, unsigned max_psk_len) {
const TestConfig *config = GetTestConfig(ssl);
if (config->psk_identity.empty()) {
if (hint != nullptr) {
fprintf(stderr, "Server PSK hint was non-null.\n");
return 0;
}
} else if (hint == nullptr ||
strcmp(hint, config->psk_identity.c_str()) != 0) {
fprintf(stderr, "Server PSK hint did not match.\n");
return 0;
}
// Account for the trailing '\0' for the identity.
if (config->psk_identity.size() >= max_identity_len ||
config->psk.size() > max_psk_len) {
fprintf(stderr, "PSK buffers too small\n");
return 0;
}
BUF_strlcpy(out_identity, config->psk_identity.c_str(),
max_identity_len);
memcpy(out_psk, config->psk.data(), config->psk.size());
return config->psk.size();
}
static unsigned PskServerCallback(SSL *ssl, const char *identity,
uint8_t *out_psk, unsigned max_psk_len) {
const TestConfig *config = GetTestConfig(ssl);
if (strcmp(identity, config->psk_identity.c_str()) != 0) {
fprintf(stderr, "Client PSK identity did not match.\n");
return 0;
}
if (config->psk.size() > max_psk_len) {
fprintf(stderr, "PSK buffers too small\n");
return 0;
}
memcpy(out_psk, config->psk.data(), config->psk.size());
return config->psk.size();
}
static int CertCallback(SSL *ssl, void *arg) {
const TestConfig *config = GetTestConfig(ssl);
// Check the CertificateRequest metadata is as expected.
//
// TODO(davidben): Test |SSL_get_client_CA_list|.
if (!SSL_is_server(ssl) &&
!config->expected_certificate_types.empty()) {
const uint8_t *certificate_types;
size_t certificate_types_len =
SSL_get0_certificate_types(ssl, &certificate_types);
if (certificate_types_len != config->expected_certificate_types.size() ||
memcmp(certificate_types,
config->expected_certificate_types.data(),
certificate_types_len) != 0) {
fprintf(stderr, "certificate types mismatch\n");
return 0;
}
}
// The certificate will be installed via other means.
if (!config->async ||
config->use_old_client_cert_callback) {
return 1;
}
if (!GetTestState(ssl)->cert_ready) {
return -1;
}
if (!InstallCertificate(ssl)) {
return 0;
}
return 1;
}
static void InfoCallback(const SSL *ssl, int type, int val) {
if (type == SSL_CB_HANDSHAKE_DONE) {
if (GetTestConfig(ssl)->handshake_never_done) {
fprintf(stderr, "Handshake unexpectedly completed.\n");
// Abort before any expected error code is printed, to ensure the overall
// test fails.
abort();
}
GetTestState(ssl)->handshake_done = true;
// Callbacks may be called again on a new handshake.
GetTestState(ssl)->ticket_decrypt_done = false;
GetTestState(ssl)->alpn_select_done = false;
}
}
static int NewSessionCallback(SSL *ssl, SSL_SESSION *session) {
GetTestState(ssl)->got_new_session = true;
GetTestState(ssl)->new_session.reset(session);
return 1;
}
static int TicketKeyCallback(SSL *ssl, uint8_t *key_name, uint8_t *iv,
EVP_CIPHER_CTX *ctx, HMAC_CTX *hmac_ctx,
int encrypt) {
if (!encrypt) {
if (GetTestState(ssl)->ticket_decrypt_done) {
fprintf(stderr, "TicketKeyCallback called after completion.\n");
return -1;
}
GetTestState(ssl)->ticket_decrypt_done = true;
}
// This is just test code, so use the all-zeros key.
static const uint8_t kZeros[16] = {0};
if (encrypt) {
memcpy(key_name, kZeros, sizeof(kZeros));
RAND_bytes(iv, 16);
} else if (memcmp(key_name, kZeros, 16) != 0) {
return 0;
}
if (!HMAC_Init_ex(hmac_ctx, kZeros, sizeof(kZeros), EVP_sha256(), NULL) ||
!EVP_CipherInit_ex(ctx, EVP_aes_128_cbc(), NULL, kZeros, iv, encrypt)) {
return -1;
}
if (!encrypt) {
return GetTestConfig(ssl)->renew_ticket ? 2 : 1;
}
return 1;
}
// kCustomExtensionValue is the extension value that the custom extension
// callbacks will add.
static const uint16_t kCustomExtensionValue = 1234;
static void *const kCustomExtensionAddArg =
reinterpret_cast<void *>(kCustomExtensionValue);
static void *const kCustomExtensionParseArg =
reinterpret_cast<void *>(kCustomExtensionValue + 1);
static const char kCustomExtensionContents[] = "custom extension";
static int CustomExtensionAddCallback(SSL *ssl, unsigned extension_value,
const uint8_t **out, size_t *out_len,
int *out_alert_value, void *add_arg) {
if (extension_value != kCustomExtensionValue ||
add_arg != kCustomExtensionAddArg) {
abort();
}
if (GetTestConfig(ssl)->custom_extension_skip) {
return 0;
}
if (GetTestConfig(ssl)->custom_extension_fail_add) {
return -1;
}
*out = reinterpret_cast<const uint8_t*>(kCustomExtensionContents);
*out_len = sizeof(kCustomExtensionContents) - 1;
return 1;
}
static void CustomExtensionFreeCallback(SSL *ssl, unsigned extension_value,
const uint8_t *out, void *add_arg) {
if (extension_value != kCustomExtensionValue ||
add_arg != kCustomExtensionAddArg ||
out != reinterpret_cast<const uint8_t *>(kCustomExtensionContents)) {
abort();
}
}
static int CustomExtensionParseCallback(SSL *ssl, unsigned extension_value,
const uint8_t *contents,
size_t contents_len,
int *out_alert_value, void *parse_arg) {
if (extension_value != kCustomExtensionValue ||
parse_arg != kCustomExtensionParseArg) {
abort();
}
if (contents_len != sizeof(kCustomExtensionContents) - 1 ||
memcmp(contents, kCustomExtensionContents, contents_len) != 0) {
*out_alert_value = SSL_AD_DECODE_ERROR;
return 0;
}
return 1;
}
static int ServerNameCallback(SSL *ssl, int *out_alert, void *arg) {
// SNI must be accessible from the SNI callback.
const TestConfig *config = GetTestConfig(ssl);
const char *server_name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (server_name == nullptr ||
std::string(server_name) != config->expected_server_name) {
fprintf(stderr, "servername mismatch (got %s; want %s)\n", server_name,
config->expected_server_name.c_str());
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
return SSL_TLSEXT_ERR_OK;
}
// Connect returns a new socket connected to localhost on |port| or -1 on
// error.
static int Connect(uint16_t port) {
int sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
PrintSocketError("socket");
return -1;
}
int nodelay = 1;
if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
reinterpret_cast<const char*>(&nodelay), sizeof(nodelay)) != 0) {
PrintSocketError("setsockopt");
closesocket(sock);
return -1;
}
sockaddr_in sin;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
if (!inet_pton(AF_INET, "127.0.0.1", &sin.sin_addr)) {
PrintSocketError("inet_pton");
closesocket(sock);
return -1;
}
if (connect(sock, reinterpret_cast<const sockaddr*>(&sin),
sizeof(sin)) != 0) {
PrintSocketError("connect");
closesocket(sock);
return -1;
}
return sock;
}
class SocketCloser {
public:
explicit SocketCloser(int sock) : sock_(sock) {}
~SocketCloser() {
// Half-close and drain the socket before releasing it. This seems to be
// necessary for graceful shutdown on Windows. It will also avoid write
// failures in the test runner.
#if defined(OPENSSL_SYS_WINDOWS)
shutdown(sock_, SD_SEND);
#else
shutdown(sock_, SHUT_WR);
#endif
while (true) {
char buf[1024];
if (recv(sock_, buf, sizeof(buf), 0) <= 0) {
break;
}
}
closesocket(sock_);
}
private:
const int sock_;
};
static bssl::UniquePtr<SSL_CTX> SetupCtx(const TestConfig *config) {
const char sess_id_ctx[] = "ossl_shim";
bssl::UniquePtr<SSL_CTX> ssl_ctx(SSL_CTX_new(
config->is_dtls ? DTLS_method() : TLS_method()));
if (!ssl_ctx) {
return nullptr;
}
SSL_CTX_set_security_level(ssl_ctx.get(), 0);
#if 0
/* Disabled for now until we have some TLS1.3 support */
// Enable TLS 1.3 for tests.
if (!config->is_dtls &&
!SSL_CTX_set_max_proto_version(ssl_ctx.get(), TLS1_3_VERSION)) {
return nullptr;
}
#else
/* Ensure we don't negotiate TLSv1.3 until we can handle it */
if (!config->is_dtls &&
!SSL_CTX_set_max_proto_version(ssl_ctx.get(), TLS1_2_VERSION)) {
return nullptr;
}
#endif
std::string cipher_list = "ALL";
if (!config->cipher.empty()) {
cipher_list = config->cipher;
SSL_CTX_set_options(ssl_ctx.get(), SSL_OP_CIPHER_SERVER_PREFERENCE);
}
if (!SSL_CTX_set_cipher_list(ssl_ctx.get(), cipher_list.c_str())) {
return nullptr;
}
DH *tmpdh;
if (config->use_sparse_dh_prime) {
BIGNUM *p, *g;
p = BN_new();
g = BN_new();
tmpdh = DH_new();
if (p == NULL || g == NULL || tmpdh == NULL) {
BN_free(p);
BN_free(g);
DH_free(tmpdh);
return nullptr;
}
// This prime number is 2^1024 + 643 – a value just above a power of two.
// Because of its form, values modulo it are essentially certain to be one
// byte shorter. This is used to test padding of these values.
if (BN_hex2bn(
&p,
"1000000000000000000000000000000000000000000000000000000000000000"
"0000000000000000000000000000000000000000000000000000000000000000"
"0000000000000000000000000000000000000000000000000000000000000000"
"0000000000000000000000000000000000000000000000000000000000000028"
"3") == 0 ||
!BN_set_word(g, 2)) {
BN_free(p);
BN_free(g);
DH_free(tmpdh);
return nullptr;
}
DH_set0_pqg(tmpdh, p, NULL, g);
} else {
tmpdh = DH_get_2048_256();
}
bssl::UniquePtr<DH> dh(tmpdh);
if (!dh || !SSL_CTX_set_tmp_dh(ssl_ctx.get(), dh.get())) {
return nullptr;
}
SSL_CTX_set_session_cache_mode(ssl_ctx.get(), SSL_SESS_CACHE_BOTH);
if (config->use_old_client_cert_callback) {
SSL_CTX_set_client_cert_cb(ssl_ctx.get(), ClientCertCallback);
}
SSL_CTX_set_npn_advertised_cb(
ssl_ctx.get(), NextProtosAdvertisedCallback, NULL);
if (!config->select_next_proto.empty()) {
SSL_CTX_set_next_proto_select_cb(ssl_ctx.get(), NextProtoSelectCallback,
NULL);
}
if (!config->select_alpn.empty() || config->decline_alpn) {
SSL_CTX_set_alpn_select_cb(ssl_ctx.get(), AlpnSelectCallback, NULL);
}
SSL_CTX_set_info_callback(ssl_ctx.get(), InfoCallback);
SSL_CTX_sess_set_new_cb(ssl_ctx.get(), NewSessionCallback);
if (config->use_ticket_callback) {
SSL_CTX_set_tlsext_ticket_key_cb(ssl_ctx.get(), TicketKeyCallback);
}
if (config->enable_client_custom_extension &&
!SSL_CTX_add_client_custom_ext(
ssl_ctx.get(), kCustomExtensionValue, CustomExtensionAddCallback,
CustomExtensionFreeCallback, kCustomExtensionAddArg,
CustomExtensionParseCallback, kCustomExtensionParseArg)) {
return nullptr;
}
if (config->enable_server_custom_extension &&
!SSL_CTX_add_server_custom_ext(
ssl_ctx.get(), kCustomExtensionValue, CustomExtensionAddCallback,
CustomExtensionFreeCallback, kCustomExtensionAddArg,
CustomExtensionParseCallback, kCustomExtensionParseArg)) {
return nullptr;
}
if (config->verify_fail) {
SSL_CTX_set_cert_verify_callback(ssl_ctx.get(), VerifyFail, NULL);
} else {
SSL_CTX_set_cert_verify_callback(ssl_ctx.get(), VerifySucceed, NULL);
}
if (config->use_null_client_ca_list) {
SSL_CTX_set_client_CA_list(ssl_ctx.get(), nullptr);
}
if (!SSL_CTX_set_session_id_context(ssl_ctx.get(),
(const unsigned char *)sess_id_ctx,
sizeof(sess_id_ctx) - 1))
return nullptr;
if (!config->expected_server_name.empty()) {
SSL_CTX_set_tlsext_servername_callback(ssl_ctx.get(), ServerNameCallback);
}
return ssl_ctx;
}
// RetryAsync is called after a failed operation on |ssl| with return code
// |ret|. If the operation should be retried, it simulates one asynchronous
// event and returns true. Otherwise it returns false.
static bool RetryAsync(SSL *ssl, int ret) {
// No error; don't retry.
if (ret >= 0) {
return false;
}
TestState *test_state = GetTestState(ssl);
assert(GetTestConfig(ssl)->async);
if (test_state->packeted_bio != nullptr &&
PacketedBioAdvanceClock(test_state->packeted_bio)) {
// The DTLS retransmit logic silently ignores write failures. So the test
// may progress, allow writes through synchronously.
AsyncBioEnforceWriteQuota(test_state->async_bio, false);
int timeout_ret = DTLSv1_handle_timeout(ssl);
AsyncBioEnforceWriteQuota(test_state->async_bio, true);
if (timeout_ret < 0) {
fprintf(stderr, "Error retransmitting.\n");
return false;
}
return true;
}
// 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.
switch (SSL_get_error(ssl, ret)) {
case SSL_ERROR_WANT_READ:
AsyncBioAllowRead(test_state->async_bio, 1);
return true;
case SSL_ERROR_WANT_WRITE:
AsyncBioAllowWrite(test_state->async_bio, 1);
return true;
case SSL_ERROR_WANT_X509_LOOKUP:
test_state->cert_ready = true;
return true;
default:
return false;
}
}
// DoRead reads from |ssl|, resolving any asynchronous operations. It returns
// the result value of the final |SSL_read| call.
static int DoRead(SSL *ssl, uint8_t *out, size_t max_out) {
const TestConfig *config = GetTestConfig(ssl);
TestState *test_state = GetTestState(ssl);
int ret;
do {
if (config->async) {
// The DTLS retransmit logic silently ignores write failures. So the test
// may progress, allow writes through synchronously. |SSL_read| may
// trigger a retransmit, so disconnect the write quota.
AsyncBioEnforceWriteQuota(test_state->async_bio, false);
}
ret = config->peek_then_read ? SSL_peek(ssl, out, max_out)
: SSL_read(ssl, out, max_out);
if (config->async) {
AsyncBioEnforceWriteQuota(test_state->async_bio, true);
}
} while (config->async && RetryAsync(ssl, ret));
if (config->peek_then_read && ret > 0) {
std::unique_ptr<uint8_t[]> buf(new uint8_t[static_cast<size_t>(ret)]);
// SSL_peek should synchronously return the same data.
int ret2 = SSL_peek(ssl, buf.get(), ret);
if (ret2 != ret ||
memcmp(buf.get(), out, ret) != 0) {
fprintf(stderr, "First and second SSL_peek did not match.\n");
return -1;
}
// SSL_read should synchronously return the same data and consume it.
ret2 = SSL_read(ssl, buf.get(), ret);
if (ret2 != ret ||
memcmp(buf.get(), out, ret) != 0) {
fprintf(stderr, "SSL_peek and SSL_read did not match.\n");
return -1;
}
}
return ret;
}
// WriteAll writes |in_len| bytes from |in| to |ssl|, resolving any asynchronous
// operations. It returns the result of the final |SSL_write| call.
static int WriteAll(SSL *ssl, const uint8_t *in, size_t in_len) {
const TestConfig *config = GetTestConfig(ssl);
int ret;
do {
ret = SSL_write(ssl, in, in_len);
if (ret > 0) {
in += ret;
in_len -= ret;
}
} while ((config->async && RetryAsync(ssl, ret)) || (ret > 0 && in_len > 0));
return ret;
}
// DoShutdown calls |SSL_shutdown|, resolving any asynchronous operations. It
// returns the result of the final |SSL_shutdown| call.
static int DoShutdown(SSL *ssl) {
const TestConfig *config = GetTestConfig(ssl);
int ret;
do {
ret = SSL_shutdown(ssl);
} while (config->async && RetryAsync(ssl, ret));
return ret;
}
static uint16_t GetProtocolVersion(const SSL *ssl) {
uint16_t version = SSL_version(ssl);
if (!SSL_is_dtls(ssl)) {
return version;
}
return 0x0201 + ~version;
}
// CheckHandshakeProperties checks, immediately after |ssl| completes its
// initial handshake (or False Starts), whether all the properties are
// consistent with the test configuration and invariants.
static bool CheckHandshakeProperties(SSL *ssl, bool is_resume) {
const TestConfig *config = GetTestConfig(ssl);
if (SSL_get_current_cipher(ssl) == nullptr) {
fprintf(stderr, "null cipher after handshake\n");
return false;
}
if (is_resume &&
(!!SSL_session_reused(ssl) == config->expect_session_miss)) {
fprintf(stderr, "session was%s reused\n",
SSL_session_reused(ssl) ? "" : " not");
return false;
}
if (!GetTestState(ssl)->handshake_done) {
fprintf(stderr, "handshake was not completed\n");
return false;
}
if (!config->is_server) {
bool expect_new_session =
!config->expect_no_session &&
(!SSL_session_reused(ssl) || config->expect_ticket_renewal) &&
// Session tickets are sent post-handshake in TLS 1.3.
GetProtocolVersion(ssl) < TLS1_3_VERSION;
if (expect_new_session != GetTestState(ssl)->got_new_session) {
fprintf(stderr,
"new session was%s cached, but we expected the opposite\n",
GetTestState(ssl)->got_new_session ? "" : " not");
return false;
}
}
if (!config->expected_server_name.empty()) {
const char *server_name =
SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (server_name == nullptr ||
std::string(server_name) != config->expected_server_name) {
fprintf(stderr, "servername mismatch (got %s; want %s)\n",
server_name, config->expected_server_name.c_str());
return false;
}
}
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 false;
}
}
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 false;
}
}
if (config->expect_extended_master_secret) {
if (!SSL_get_extms_support(ssl)) {
fprintf(stderr, "No EMS for connection when expected");
return false;
}
}
if (config->expect_verify_result) {
int expected_verify_result = config->verify_fail ?
X509_V_ERR_APPLICATION_VERIFICATION :
X509_V_OK;
if (SSL_get_verify_result(ssl) != expected_verify_result) {
fprintf(stderr, "Wrong certificate verification result\n");
return false;
}
}
if (!config->psk.empty()) {
if (SSL_get_peer_cert_chain(ssl) != nullptr) {
fprintf(stderr, "Received peer certificate on a PSK cipher.\n");
return false;
}
} else if (!config->is_server || config->require_any_client_certificate) {
if (SSL_get_peer_certificate(ssl) == nullptr) {
fprintf(stderr, "Received no peer certificate but expected one.\n");
return false;
}
}
return true;
}
// DoExchange runs a test SSL exchange against the peer. On success, it returns
// true and sets |*out_session| to the negotiated SSL session. If the test is a
// resumption attempt, |is_resume| is true and |session| is the session from the
// previous exchange.
static bool DoExchange(bssl::UniquePtr<SSL_SESSION> *out_session,
SSL_CTX *ssl_ctx, const TestConfig *config,
bool is_resume, SSL_SESSION *session) {
bssl::UniquePtr<SSL> ssl(SSL_new(ssl_ctx));
if (!ssl) {
return false;
}
if (!SetTestConfig(ssl.get(), config) ||
!SetTestState(ssl.get(), std::unique_ptr<TestState>(new TestState))) {
return false;
}
if (config->fallback_scsv &&
!SSL_set_mode(ssl.get(), SSL_MODE_SEND_FALLBACK_SCSV)) {
return false;
}
// Install the certificate synchronously if nothing else will handle it.
if (!config->use_old_client_cert_callback &&
!config->async &&
!InstallCertificate(ssl.get())) {
return false;
}
SSL_set_cert_cb(ssl.get(), CertCallback, nullptr);
if (config->require_any_client_certificate) {
SSL_set_verify(ssl.get(), SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
NULL);
}
if (config->verify_peer) {
SSL_set_verify(ssl.get(), SSL_VERIFY_PEER, NULL);
}
if (config->partial_write) {
SSL_set_mode(ssl.get(), SSL_MODE_ENABLE_PARTIAL_WRITE);
}
if (config->no_tls13) {
SSL_set_options(ssl.get(), SSL_OP_NO_TLSv1_3);
}
if (config->no_tls12) {
SSL_set_options(ssl.get(), SSL_OP_NO_TLSv1_2);
}
if (config->no_tls11) {
SSL_set_options(ssl.get(), SSL_OP_NO_TLSv1_1);
}
if (config->no_tls1) {
SSL_set_options(ssl.get(), SSL_OP_NO_TLSv1);
}
if (config->no_ssl3) {
SSL_set_options(ssl.get(), SSL_OP_NO_SSLv3);
}
if (!config->host_name.empty() &&
!SSL_set_tlsext_host_name(ssl.get(), config->host_name.c_str())) {
return false;
}
if (!config->advertise_alpn.empty() &&
SSL_set_alpn_protos(ssl.get(),
(const uint8_t *)config->advertise_alpn.data(),
config->advertise_alpn.size()) != 0) {
return false;
}
if (!config->psk.empty()) {
SSL_set_psk_client_callback(ssl.get(), PskClientCallback);
SSL_set_psk_server_callback(ssl.get(), PskServerCallback);
}
if (!config->psk_identity.empty() &&
!SSL_use_psk_identity_hint(ssl.get(), config->psk_identity.c_str())) {
return false;
}
if (!config->srtp_profiles.empty() &&
SSL_set_tlsext_use_srtp(ssl.get(), config->srtp_profiles.c_str())) {
return false;
}
if (config->min_version != 0 &&
!SSL_set_min_proto_version(ssl.get(), (uint16_t)config->min_version)) {
return false;
}
if (config->max_version != 0 &&
!SSL_set_max_proto_version(ssl.get(), (uint16_t)config->max_version)) {
return false;
}
if (config->mtu != 0) {
SSL_set_options(ssl.get(), SSL_OP_NO_QUERY_MTU);
SSL_set_mtu(ssl.get(), config->mtu);
}
if (config->renegotiate_freely) {
// This is always on for OpenSSL.
}
if (!config->check_close_notify) {
SSL_set_quiet_shutdown(ssl.get(), 1);
}
if (config->p384_only) {
int nid = NID_secp384r1;
if (!SSL_set1_curves(ssl.get(), &nid, 1)) {
return false;
}
}
if (config->enable_all_curves) {
static const int kAllCurves[] = {
NID_X25519, NID_X9_62_prime256v1, NID_X448, NID_secp521r1, NID_secp384r1
};
if (!SSL_set1_curves(ssl.get(), kAllCurves,
OPENSSL_ARRAY_SIZE(kAllCurves))) {
return false;
}
}
if (config->max_cert_list > 0) {
SSL_set_max_cert_list(ssl.get(), config->max_cert_list);
}
if (!config->async) {
SSL_set_mode(ssl.get(), SSL_MODE_AUTO_RETRY);
}
int sock = Connect(config->port);
if (sock == -1) {
return false;
}
SocketCloser closer(sock);
bssl::UniquePtr<BIO> bio(BIO_new_socket(sock, BIO_NOCLOSE));
if (!bio) {
return false;
}
if (config->is_dtls) {
bssl::UniquePtr<BIO> packeted = PacketedBioCreate(!config->async);
if (!packeted) {
return false;
}
GetTestState(ssl.get())->packeted_bio = packeted.get();
BIO_push(packeted.get(), bio.release());
bio = std::move(packeted);
}
if (config->async) {
bssl::UniquePtr<BIO> async_scoped =
config->is_dtls ? AsyncBioCreateDatagram() : AsyncBioCreate();
if (!async_scoped) {
return false;
}
BIO_push(async_scoped.get(), bio.release());
GetTestState(ssl.get())->async_bio = async_scoped.get();
bio = std::move(async_scoped);
}
SSL_set_bio(ssl.get(), bio.get(), bio.get());
bio.release(); // SSL_set_bio takes ownership.
if (session != NULL) {
if (!config->is_server) {
if (SSL_set_session(ssl.get(), session) != 1) {
return false;
}
}
}
#if 0
// KNOWN BUG: OpenSSL's SSL_get_current_cipher behaves incorrectly when
// offering resumption.
if (SSL_get_current_cipher(ssl.get()) != nullptr) {
fprintf(stderr, "non-null cipher before handshake\n");
return false;
}
#endif
int ret;
if (config->implicit_handshake) {
if (config->is_server) {
SSL_set_accept_state(ssl.get());
} else {
SSL_set_connect_state(ssl.get());
}
} else {
do {
if (config->is_server) {
ret = SSL_accept(ssl.get());
} else {
ret = SSL_connect(ssl.get());
}
} while (config->async && RetryAsync(ssl.get(), ret));
if (ret != 1 ||
!CheckHandshakeProperties(ssl.get(), is_resume)) {
return false;
}
// Reset the state to assert later that the callback isn't called in
// renegotiations.
GetTestState(ssl.get())->got_new_session = false;
}
if (config->export_keying_material > 0) {
std::vector<uint8_t> result(
static_cast<size_t>(config->export_keying_material));
if (SSL_export_keying_material(
ssl.get(), result.data(), result.size(),
config->export_label.data(), config->export_label.size(),
reinterpret_cast<const uint8_t*>(config->export_context.data()),
config->export_context.size(), config->use_export_context) != 1) {
fprintf(stderr, "failed to export keying material\n");
return false;
}
if (WriteAll(ssl.get(), result.data(), result.size()) < 0) {
return false;
}
}
if (config->write_different_record_sizes) {
if (config->is_dtls) {
fprintf(stderr, "write_different_record_sizes not supported for DTLS\n");
return false;
}
// This mode writes a number of different record sizes in an attempt to
// trip up the CBC record splitting code.
static const size_t kBufLen = 32769;
std::unique_ptr<uint8_t[]> buf(new uint8_t[kBufLen]);
memset(buf.get(), 0x42, kBufLen);
static const size_t kRecordSizes[] = {
0, 1, 255, 256, 257, 16383, 16384, 16385, 32767, 32768, 32769};
for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kRecordSizes); i++) {
const size_t len = kRecordSizes[i];
if (len > kBufLen) {
fprintf(stderr, "Bad kRecordSizes value.\n");
return false;
}
if (WriteAll(ssl.get(), buf.get(), len) < 0) {
return false;
}
}
} else {
if (config->shim_writes_first) {
if (WriteAll(ssl.get(), reinterpret_cast<const uint8_t *>("hello"),
5) < 0) {
return false;
}
}
if (!config->shim_shuts_down) {
for (;;) {
static const size_t kBufLen = 16384;
std::unique_ptr<uint8_t[]> buf(new uint8_t[kBufLen]);
// Read only 512 bytes at a time in TLS to ensure records may be
// returned in multiple reads.
int n = DoRead(ssl.get(), buf.get(), config->is_dtls ? kBufLen : 512);
int err = SSL_get_error(ssl.get(), n);
if (err == SSL_ERROR_ZERO_RETURN ||
(n == 0 && err == SSL_ERROR_SYSCALL)) {
if (n != 0) {
fprintf(stderr, "Invalid SSL_get_error output\n");
return false;
}
// Stop on either clean or unclean shutdown.
break;
} else if (err != SSL_ERROR_NONE) {
if (n > 0) {
fprintf(stderr, "Invalid SSL_get_error output\n");
return false;
}
return false;
}
// Successfully read data.
if (n <= 0) {
fprintf(stderr, "Invalid SSL_get_error output\n");
return false;
}
// After a successful read, with or without False Start, the handshake
// must be complete.
if (!GetTestState(ssl.get())->handshake_done) {
fprintf(stderr, "handshake was not completed after SSL_read\n");
return false;
}
for (int i = 0; i < n; i++) {
buf[i] ^= 0xff;
}
if (WriteAll(ssl.get(), buf.get(), n) < 0) {
return false;
}
}
}
}
if (!config->is_server &&
!config->implicit_handshake &&
// Session tickets are sent post-handshake in TLS 1.3.
GetProtocolVersion(ssl.get()) < TLS1_3_VERSION &&
GetTestState(ssl.get())->got_new_session) {
fprintf(stderr, "new session was established after the handshake\n");
return false;
}
if (GetProtocolVersion(ssl.get()) >= TLS1_3_VERSION && !config->is_server) {
bool expect_new_session =
!config->expect_no_session && !config->shim_shuts_down;
if (expect_new_session != GetTestState(ssl.get())->got_new_session) {
fprintf(stderr,
"new session was%s cached, but we expected the opposite\n",
GetTestState(ssl.get())->got_new_session ? "" : " not");
return false;
}
}
if (out_session) {
*out_session = std::move(GetTestState(ssl.get())->new_session);
}
ret = DoShutdown(ssl.get());
if (config->shim_shuts_down && config->check_close_notify) {
// We initiate shutdown, so |SSL_shutdown| will return in two stages. First
// it returns zero when our close_notify is sent, then one when the peer's
// is received.
if (ret != 0) {
fprintf(stderr, "Unexpected SSL_shutdown result: %d != 0\n", ret);
return false;
}
ret = DoShutdown(ssl.get());
}
if (ret != 1) {
fprintf(stderr, "Unexpected SSL_shutdown result: %d != 1\n", ret);
return false;
}
if (SSL_total_renegotiations(ssl.get()) !=
config->expect_total_renegotiations) {
fprintf(stderr, "Expected %d renegotiations, got %ld\n",
config->expect_total_renegotiations,
SSL_total_renegotiations(ssl.get()));
return false;
}
return true;
}
class StderrDelimiter {
public:
~StderrDelimiter() { fprintf(stderr, "--- DONE ---\n"); }
};
static int Main(int argc, char **argv) {
// To distinguish ASan's output from ours, add a trailing message to stderr.
// Anything following this line will be considered an error.
StderrDelimiter delimiter;
#if defined(OPENSSL_SYS_WINDOWS)
/* Initialize Winsock. */
WORD wsa_version = MAKEWORD(2, 2);
WSADATA wsa_data;
int wsa_err = WSAStartup(wsa_version, &wsa_data);
if (wsa_err != 0) {
fprintf(stderr, "WSAStartup failed: %d\n", wsa_err);
return 1;
}
if (wsa_data.wVersion != wsa_version) {
fprintf(stderr, "Didn't get expected version: %x\n", wsa_data.wVersion);
return 1;
}
#else
signal(SIGPIPE, SIG_IGN);
#endif
OPENSSL_init_crypto(0, NULL);
OPENSSL_init_ssl(0, NULL);
g_config_index = SSL_get_ex_new_index(0, NULL, NULL, NULL, NULL);
g_state_index = SSL_get_ex_new_index(0, NULL, NULL, NULL, TestStateExFree);
if (g_config_index < 0 || g_state_index < 0) {
return 1;
}
TestConfig config;
if (!ParseConfig(argc - 1, argv + 1, &config)) {
return Usage(argv[0]);
}
bssl::UniquePtr<SSL_CTX> ssl_ctx = SetupCtx(&config);
if (!ssl_ctx) {
ERR_print_errors_fp(stderr);
return 1;
}
bssl::UniquePtr<SSL_SESSION> session;
for (int i = 0; i < config.resume_count + 1; i++) {
bool is_resume = i > 0;
if (is_resume && !config.is_server && !session) {
fprintf(stderr, "No session to offer.\n");
return 1;
}
bssl::UniquePtr<SSL_SESSION> offer_session = std::move(session);
if (!DoExchange(&session, ssl_ctx.get(), &config, is_resume,
offer_session.get())) {
fprintf(stderr, "Connection %d failed.\n", i + 1);
ERR_print_errors_fp(stderr);
return 1;
}
}
return 0;
}
} // namespace bssl
int main(int argc, char **argv) {
return bssl::Main(argc, argv);
}