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/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "src/core/tsi/ssl/session_cache/ssl_session_cache.h"
#include <string>
#include <unordered_set>
#include <gtest/gtest.h>
#include <grpc/grpc.h>
#include <grpc/support/log.h>
#include "test/core/util/test_config.h"
namespace grpc_core {
namespace {
class SessionTracker;
struct SessionExDataId {
SessionTracker* tracker;
long id;
};
class SessionTracker {
public:
SessionTracker() { ssl_context_ = SSL_CTX_new(TLSv1_2_method()); }
~SessionTracker() { SSL_CTX_free(ssl_context_); }
tsi::SslSessionPtr NewSession(long id) {
static int ex_data_id = SSL_SESSION_get_ex_new_index(
0, nullptr, nullptr, nullptr, DestroyExData);
GPR_ASSERT(ex_data_id != -1);
// OpenSSL and different version of BoringSSL don't agree on API
// so try both.
tsi::SslSessionPtr session = NewSessionInternal(SSL_SESSION_new);
SessionExDataId* data = new SessionExDataId{this, id};
int result = SSL_SESSION_set_ex_data(session.get(), ex_data_id, data);
EXPECT_EQ(result, 1);
alive_sessions_.insert(id);
return session;
}
bool IsAlive(long id) const {
return alive_sessions_.find(id) != alive_sessions_.end();
}
size_t AliveCount() const { return alive_sessions_.size(); }
private:
tsi::SslSessionPtr NewSessionInternal(SSL_SESSION* (*cb)()) {
return tsi::SslSessionPtr(cb());
}
tsi::SslSessionPtr NewSessionInternal(SSL_SESSION* (*cb)(const SSL_CTX*)) {
return tsi::SslSessionPtr(cb(ssl_context_));
}
static void DestroyExData(void* /*parent*/, void* ptr, CRYPTO_EX_DATA* /*ad*/,
int /*index*/, long /*argl*/, void* /*argp*/) {
SessionExDataId* data = static_cast<SessionExDataId*>(ptr);
data->tracker->alive_sessions_.erase(data->id);
delete data;
}
SSL_CTX* ssl_context_;
std::unordered_set<long> alive_sessions_;
};
TEST(SslSessionCacheTest, InitialState) {
SessionTracker tracker;
// Verify session initial state.
{
tsi::SslSessionPtr tmp_sess = tracker.NewSession(1);
EXPECT_TRUE(tracker.IsAlive(1));
EXPECT_EQ(tracker.AliveCount(), 1);
}
EXPECT_FALSE(tracker.IsAlive(1));
EXPECT_EQ(tracker.AliveCount(), 0);
}
TEST(SslSessionCacheTest, LruCache) {
SessionTracker tracker;
{
RefCountedPtr<tsi::SslSessionLRUCache> cache =
tsi::SslSessionLRUCache::Create(3);
tsi::SslSessionPtr sess2 = tracker.NewSession(2);
SSL_SESSION* sess2_ptr = sess2.get();
cache->Put("first.dropbox.com", std::move(sess2));
EXPECT_EQ(cache->Get("first.dropbox.com").get(), sess2_ptr);
EXPECT_TRUE(tracker.IsAlive(2));
EXPECT_EQ(tracker.AliveCount(), 1);
// Putting element with the same key destroys old session.
tsi::SslSessionPtr sess3 = tracker.NewSession(3);
SSL_SESSION* sess3_ptr = sess3.get();
cache->Put("first.dropbox.com", std::move(sess3));
EXPECT_FALSE(tracker.IsAlive(2));
EXPECT_EQ(cache->Get("first.dropbox.com").get(), sess3_ptr);
EXPECT_TRUE(tracker.IsAlive(3));
EXPECT_EQ(tracker.AliveCount(), 1);
// Putting three more elements discards current one.
for (long id = 4; id < 7; id++) {
EXPECT_TRUE(tracker.IsAlive(3));
std::string domain = std::to_string(id) + ".random.domain";
cache->Put(domain.c_str(), tracker.NewSession(id));
}
EXPECT_EQ(cache->Size(), 3);
EXPECT_FALSE(tracker.IsAlive(3));
EXPECT_EQ(tracker.AliveCount(), 3);
// Accessing element moves it into front of the queue.
EXPECT_TRUE(cache->Get("4.random.domain"));
EXPECT_TRUE(tracker.IsAlive(4));
EXPECT_TRUE(tracker.IsAlive(5));
EXPECT_TRUE(tracker.IsAlive(6));
// One element has to be evicted from cache->
cache->Put("7.random.domain", tracker.NewSession(7));
EXPECT_TRUE(tracker.IsAlive(4));
EXPECT_FALSE(tracker.IsAlive(5));
EXPECT_TRUE(tracker.IsAlive(6));
EXPECT_TRUE(tracker.IsAlive(7));
EXPECT_EQ(tracker.AliveCount(), 3);
}
// Cache destructor destroys all sessions.
EXPECT_EQ(tracker.AliveCount(), 0);
}
} // namespace
} // namespace grpc_core
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
grpc::testing::TestEnvironment env(&argc, argv);
grpc_init();
int ret = RUN_ALL_TESTS();
grpc_shutdown();
return ret;
}
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