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#include "mutual_tls.hpp"
#include "sessions.hpp"
#include <openssl/asn1.h>
#include <openssl/ec.h>
#include <openssl/evp.h>
#include <openssl/obj_mac.h>
#include <openssl/types.h>
#include <openssl/x509.h>
#include <openssl/x509_vfy.h>
#include <openssl/x509v3.h>
#include <boost/asio/ip/address.hpp>
#include <boost/asio/ssl/verify_context.hpp>
#include <array>
#include <memory>
#include <gmock/gmock.h>
#include <gtest/gtest.h> // IWYU pragma: keep
using ::testing::IsNull;
using ::testing::NotNull;
namespace
{
class OSSLX509
{
X509* ptr = X509_new();
public:
OSSLX509& operator=(const OSSLX509&) = delete;
OSSLX509& operator=(OSSLX509&&) = delete;
OSSLX509(const OSSLX509&) = delete;
OSSLX509(OSSLX509&&) = delete;
OSSLX509() = default;
void setSubjectName()
{
X509_NAME* name = X509_get_subject_name(ptr);
std::array<unsigned char, 5> user = {'u', 's', 'e', 'r', '\0'};
X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, user.data(), -1,
-1, 0);
}
void sign()
{
// Generate test key
EVP_PKEY* pkey = nullptr;
EVP_PKEY_CTX* pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, nullptr);
ASSERT_EQ(EVP_PKEY_keygen_init(pctx), 1);
ASSERT_EQ(
EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, NID_X9_62_prime256v1),
1);
ASSERT_EQ(EVP_PKEY_keygen(pctx, &pkey), 1);
EVP_PKEY_CTX_free(pctx);
// Sign cert with key
ASSERT_EQ(X509_set_pubkey(ptr, pkey), 1);
ASSERT_GT(X509_sign(ptr, pkey, EVP_sha256()), 0);
EVP_PKEY_free(pkey);
}
X509* get()
{
return ptr;
}
~OSSLX509()
{
X509_free(ptr);
}
};
class OSSLX509StoreCTX
{
X509_STORE_CTX* ptr = X509_STORE_CTX_new();
public:
OSSLX509StoreCTX& operator=(const OSSLX509StoreCTX&) = delete;
OSSLX509StoreCTX& operator=(OSSLX509StoreCTX&&) = delete;
OSSLX509StoreCTX(const OSSLX509StoreCTX&) = delete;
OSSLX509StoreCTX(OSSLX509StoreCTX&&) = delete;
OSSLX509StoreCTX() = default;
X509_STORE_CTX* get()
{
return ptr;
}
~OSSLX509StoreCTX()
{
X509_STORE_CTX_free(ptr);
}
};
TEST(MutualTLS, GoodCert)
{
OSSLX509 x509;
x509.setSubjectName();
X509_EXTENSION* ex = X509V3_EXT_conf_nid(nullptr, nullptr, NID_key_usage,
"digitalSignature, keyAgreement");
ASSERT_THAT(ex, NotNull());
ASSERT_EQ(X509_add_ext(x509.get(), ex, -1), 1);
X509_EXTENSION_free(ex);
ex = X509V3_EXT_conf_nid(nullptr, nullptr, NID_ext_key_usage, "clientAuth");
ASSERT_THAT(ex, NotNull());
ASSERT_EQ(X509_add_ext(x509.get(), ex, -1), 1);
X509_EXTENSION_free(ex);
x509.sign();
OSSLX509StoreCTX x509Store;
X509_STORE_CTX_set_current_cert(x509Store.get(), x509.get());
boost::asio::ip::address ip;
boost::asio::ssl::verify_context ctx(x509Store.get());
std::shared_ptr<persistent_data::UserSession> session = verifyMtlsUser(ip,
ctx);
ASSERT_THAT(session, NotNull());
EXPECT_THAT(session->username, "user");
}
TEST(MutualTLS, MissingKeyUsage)
{
for (const char* usageString :
{"digitalSignature", "keyAgreement", "digitalSignature, keyAgreement"})
{
OSSLX509 x509;
x509.setSubjectName();
X509_EXTENSION* ex = X509V3_EXT_conf_nid(nullptr, nullptr,
NID_key_usage, usageString);
ASSERT_THAT(ex, NotNull());
ASSERT_EQ(X509_add_ext(x509.get(), ex, -1), 1);
X509_EXTENSION_free(ex);
ex = X509V3_EXT_conf_nid(nullptr, nullptr, NID_ext_key_usage,
"clientAuth");
ASSERT_THAT(ex, NotNull());
ASSERT_EQ(X509_add_ext(x509.get(), ex, -1), 1);
X509_EXTENSION_free(ex);
x509.sign();
OSSLX509StoreCTX x509Store;
X509_STORE_CTX_set_current_cert(x509Store.get(), x509.get());
boost::asio::ip::address ip;
boost::asio::ssl::verify_context ctx(x509Store.get());
std::shared_ptr<persistent_data::UserSession> session =
verifyMtlsUser(ip, ctx);
ASSERT_THAT(session, NotNull());
}
}
TEST(MutualTLS, MissingCert)
{
OSSLX509StoreCTX x509Store;
boost::asio::ip::address ip;
boost::asio::ssl::verify_context ctx(x509Store.get());
std::shared_ptr<persistent_data::UserSession> session = verifyMtlsUser(ip,
ctx);
ASSERT_THAT(session, IsNull());
}
} // namespace
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