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/*
* Copyright 2015 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/rtc_certificate.h"
#include <time.h>
#include <cstdint>
#include <memory>
#include <utility>
#include "api/scoped_refptr.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_conversions.h"
#include "rtc_base/ssl_identity.h"
#include "rtc_base/time_utils.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
const char* kTestCertCommonName = "RTCCertificateTest's certificate";
} // namespace
class RTCCertificateTest : public ::testing::Test {
protected:
scoped_refptr<RTCCertificate> GenerateECDSA() {
std::unique_ptr<SSLIdentity> identity(
SSLIdentity::Create(kTestCertCommonName, KeyParams::ECDSA()));
RTC_CHECK(identity);
return RTCCertificate::Create(std::move(identity));
}
// Timestamp note:
// All timestamps in this unittest are expressed in number of seconds since
// epoch, 1970-01-01T00:00:00Z (UTC). The RTCCertificate interface uses ms,
// but only seconds-precision is supported by SSLCertificate. To make the
// tests clearer we convert everything to seconds since the precision matters
// when generating certificates or comparing timestamps.
// As a result, ExpiresSeconds and HasExpiredSeconds are used instead of
// RTCCertificate::Expires and ::HasExpired for ms -> s conversion.
uint64_t NowSeconds() const { return TimeNanos() / kNumNanosecsPerSec; }
uint64_t ExpiresSeconds(const scoped_refptr<RTCCertificate>& cert) const {
uint64_t exp_ms = cert->Expires();
uint64_t exp_s = exp_ms / kNumMillisecsPerSec;
// Make sure this did not result in loss of precision.
RTC_CHECK_EQ(exp_s * kNumMillisecsPerSec, exp_ms);
return exp_s;
}
bool HasExpiredSeconds(const scoped_refptr<RTCCertificate>& cert,
uint64_t now_s) const {
return cert->HasExpired(now_s * kNumMillisecsPerSec);
}
// An RTC_CHECK ensures that `expires_s` this is in valid range of time_t as
// is required by SSLIdentityParams. On some 32-bit systems time_t is limited
// to < 2^31. On such systems this will fail for expiration times of year 2038
// or later.
scoped_refptr<RTCCertificate> GenerateCertificateWithExpires(
uint64_t expires_s) const {
RTC_CHECK(IsValueInRangeForNumericType<time_t>(expires_s));
SSLIdentityParams params;
params.common_name = kTestCertCommonName;
params.not_before = 0;
params.not_after = static_cast<time_t>(expires_s);
// Certificate type does not matter for our purposes, using ECDSA because it
// is fast to generate.
params.key_params = KeyParams::ECDSA();
std::unique_ptr<SSLIdentity> identity(SSLIdentity::CreateForTest(params));
return RTCCertificate::Create(std::move(identity));
}
};
TEST_F(RTCCertificateTest, NewCertificateNotExpired) {
// Generate a real certificate without specifying the expiration time.
// Certificate type doesn't matter, using ECDSA because it's fast to generate.
scoped_refptr<RTCCertificate> certificate = GenerateECDSA();
uint64_t now = NowSeconds();
EXPECT_FALSE(HasExpiredSeconds(certificate, now));
// Even without specifying the expiration time we would expect it to be valid
// for at least half an hour.
EXPECT_FALSE(HasExpiredSeconds(certificate, now + 30 * 60));
}
TEST_F(RTCCertificateTest, UsesExpiresAskedFor) {
uint64_t now = NowSeconds();
scoped_refptr<RTCCertificate> certificate =
GenerateCertificateWithExpires(now);
EXPECT_EQ(now, ExpiresSeconds(certificate));
}
TEST_F(RTCCertificateTest, ExpiresInOneSecond) {
// Generate a certificate that expires in 1s.
uint64_t now = NowSeconds();
scoped_refptr<RTCCertificate> certificate =
GenerateCertificateWithExpires(now + 1);
// Now it should not have expired.
EXPECT_FALSE(HasExpiredSeconds(certificate, now));
// In 2s it should have expired.
EXPECT_TRUE(HasExpiredSeconds(certificate, now + 2));
}
TEST_F(RTCCertificateTest, DifferentCertificatesNotEqual) {
scoped_refptr<RTCCertificate> a = GenerateECDSA();
scoped_refptr<RTCCertificate> b = GenerateECDSA();
EXPECT_TRUE(*a != *b);
}
TEST_F(RTCCertificateTest, CloneWithPEMSerialization) {
scoped_refptr<RTCCertificate> orig = GenerateECDSA();
// To PEM.
RTCCertificatePEM orig_pem = orig->ToPEM();
// Clone from PEM.
scoped_refptr<RTCCertificate> clone = RTCCertificate::FromPEM(orig_pem);
EXPECT_TRUE(clone);
EXPECT_TRUE(*orig == *clone);
EXPECT_EQ(orig->Expires(), clone->Expires());
}
TEST_F(RTCCertificateTest, FromPEMWithInvalidPEM) {
RTCCertificatePEM pem("not a valid PEM", "not a valid PEM");
scoped_refptr<RTCCertificate> certificate = RTCCertificate::FromPEM(pem);
EXPECT_FALSE(certificate);
}
} // namespace webrtc
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