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/* -*- indent-tabs-mode: nil -*- */
#include <gflags/gflags.h>
#include <glog/logging.h>
#include <gtest/gtest.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <memory>
#include <string>
#include "log/cert.h"
#include "log/cms_verifier.h"
#include "log/ct_extensions.h"
#include "util/status_test_util.h"
#include "util/testing.h"
#include "util/util.h"
using cert_trans::Cert;
using cert_trans::CmsVerifier;
using cert_trans::ScopedBIO;
using std::string;
using std::unique_ptr;
using std::vector;
using util::testing::StatusIs;
// Self-signed
static const char kCaCert[] = "ca-cert.pem";
// Issued by ca-cert.pem
static const char kLeafCert[] = "test-cert.pem";
// Issued by ca-cert.pem
static const char kIntermediateCert[] = "intermediate-cert.pem";
// A DER file containing a CMS signed message wrapping data that is not
// valid DER
static const char kCmsSignedDataTest2[] = "cms_test2.der";
// A DER file containing a CMS signed message wrapping a DER encoded
// certificate for test case 3 (valid signature, same signer as cert)
static const char kCmsSignedDataTest3[] = "cms_test3.der";
// A DER file with a CMS signed message but not signed by the same
// key as the certificate it contains in the payload
static const char kCmsSignedDataTest4[] = "cms_test4.der";
// A DER file with a CMS signed message with intermediate as signer and
// issuer of the embedded cert
static const char kCmsSignedDataTest5[] = "cms_test5.der";
// Subject name we expect in our embedded certificate CMS tests
static const char kCmsTestSubject[] =
"CN=?.example.com, C=GB, ST=Wales, "
"L=Erw Wen, O=Certificate Transparency";
namespace {
unique_ptr<Cert> ReadCertFromFile(const string& filename) {
string content;
CHECK(util::ReadTextFile(filename, &content))
<< "Could not read test data from " << filename
<< ". Wrong --test_srcdir?";
unique_ptr<Cert> cert(Cert::FromPemString(content));
CHECK(cert.get());
return cert;
}
class CmsVerifierTest : public ::testing::Test {
protected:
CmsVerifierTest()
: cert_dir_(FLAGS_test_srcdir + "/test/testdata"),
cert_dir_v2_(FLAGS_test_srcdir + "/test/testdata/v2/"),
ca_cert_(ReadCertFromFile(cert_dir_ + "/" + kCaCert)),
intermediate_cert_(
ReadCertFromFile(cert_dir_ + "/" + kIntermediateCert)),
leaf_cert_(ReadCertFromFile(cert_dir_ + "/" + kLeafCert)) {
}
const string cert_dir_;
const string cert_dir_v2_;
const unique_ptr<Cert> ca_cert_;
const unique_ptr<Cert> intermediate_cert_;
const unique_ptr<Cert> leaf_cert_;
CmsVerifier verifier_;
};
BIO* OpenTestFileBio(const string& filename) {
BIO* der_bio = BIO_new_file(filename.c_str(), "r");
CHECK_NOTNULL(der_bio);
return der_bio;
}
TEST_F(CmsVerifierTest, CmsSignTestCase2) {
// In this test the embedded data is not a certificate in DER format
// but it doesn't get unpacked and the signature is valid.
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest2));
ASSERT_NE(bio.get(), nullptr);
EXPECT_TRUE(verifier_.IsCmsSignedByCert(bio.get(), *ca_cert_).ValueOrDie());
}
TEST_F(CmsVerifierTest, CmsSignTestCase3) {
// The CMS should be signed by the CA that signed the cert
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest3));
ASSERT_NE(bio.get(), nullptr);
EXPECT_TRUE(verifier_.IsCmsSignedByCert(bio.get(), *ca_cert_).ValueOrDie());
}
TEST_F(CmsVerifierTest, CmsSignTestCase4) {
// The CMS is not signed by the CA that signed the cert it contains
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest4));
ASSERT_NE(bio.get(), nullptr);
EXPECT_FALSE(verifier_.IsCmsSignedByCert(bio.get(), *ca_cert_).ValueOrDie());
}
TEST_F(CmsVerifierTest, CmsVerifyTestCase2) {
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest2));
unique_ptr<Cert> unpacked_cert(
verifier_.UnpackCmsSignedCertificate(bio.get(), *ca_cert_));
ASSERT_FALSE(unpacked_cert.get());
}
TEST_F(CmsVerifierTest, CmsVerifyTestCase3) {
// For this test the embedded cert is signed by the CA
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest3));
unique_ptr<Cert> unpacked_cert(
verifier_.UnpackCmsSignedCertificate(bio.get(), *ca_cert_));
ASSERT_FALSE(unpacked_cert->HasBasicConstraintCATrue().ValueOrDie());
ASSERT_TRUE(
unpacked_cert->HasExtension(NID_authority_key_identifier).ValueOrDie());
// We built the embedded cert with redaction so this helps to prove
// that it was correctly unpacked
ASSERT_OK(unpacked_cert->IsValidWildcardRedaction());
ASSERT_EQ(kCmsTestSubject, unpacked_cert->PrintSubjectName());
}
TEST_F(CmsVerifierTest, CmsVerifyTestCase4) {
// For this test the embedded cert is signed by the intermediate CA
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest4));
unique_ptr<Cert> unpacked_cert(
verifier_.UnpackCmsSignedCertificate(bio.get(), *ca_cert_));
ASSERT_FALSE(unpacked_cert.get());
}
TEST_F(CmsVerifierTest, CmsVerifyTestCase5) {
// For this test the embedded cert is signed by the intermediate
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest5));
unique_ptr<Cert> unpacked_cert(
verifier_.UnpackCmsSignedCertificate(bio.get(), *intermediate_cert_));
ASSERT_TRUE(unpacked_cert.get());
ASSERT_FALSE(unpacked_cert->HasBasicConstraintCATrue().ValueOrDie());
ASSERT_TRUE(
unpacked_cert->HasExtension(NID_authority_key_identifier).ValueOrDie());
// We built the embedded cert with redaction so this helps to prove
// that it was correctly unpacked
ASSERT_OK(unpacked_cert->IsValidWildcardRedaction());
ASSERT_EQ(kCmsTestSubject, unpacked_cert->PrintSubjectName());
}
TEST_F(CmsVerifierTest, CmsVerifyTestCase7) {
// For this test the embedded cert is signed by the intermediate
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest5));
unique_ptr<Cert> unpacked_cert(
verifier_.UnpackCmsSignedCertificate(bio.get(), *leaf_cert_));
ASSERT_FALSE(unpacked_cert.get());
}
TEST_F(CmsVerifierTest, CmsVerifyTestCase8) {
// For this test the embedded cert is signed by the intermediate
ScopedBIO bio(OpenTestFileBio(cert_dir_v2_ + kCmsSignedDataTest5));
unique_ptr<Cert> unpacked_cert(
verifier_.UnpackCmsSignedCertificate(bio.get(), *ca_cert_));
ASSERT_FALSE(unpacked_cert.get());
}
} // namespace
int main(int argc, char** argv) {
cert_trans::test::InitTesting(argv[0], &argc, &argv, true);
OpenSSL_add_all_algorithms();
ERR_load_crypto_strings();
cert_trans::LoadCtExtensions();
return RUN_ALL_TESTS();
}
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