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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// crypto::keypair tests
#include "crypto/keypair.h"
#include "crypto/test_support.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
using crypto::keypair::PrivateKey;
using crypto::keypair::PublicKey;
using crypto::test::FixedRsa2048PrivateKeyForTesting;
using crypto::test::FixedRsa4096PrivateKeyForTesting;
using crypto::test::FixedRsa2048PublicKeyForTesting;
using crypto::test::FixedRsa4096PublicKeyForTesting;
// Generate keys, roundtrip them through encoding/decoding to PrivateKeyInfo,
// and ensure the resulting key is equivalent. That gives some confidence that
// the generated key is actually a valid key because of the validation in
// FromPrivateKeyInfo().
TEST(Keypair, GenerateAndRoundtripPrivateKey) {
auto expect_roundtrip = [](const PrivateKey& key) {
auto k = PrivateKey::FromPrivateKeyInfo(key.ToPrivateKeyInfo());
ASSERT_TRUE(k);
EXPECT_EQ(key.ToPrivateKeyInfo(), k->ToPrivateKeyInfo());
EXPECT_EQ(key.IsRsa(), k->IsRsa());
EXPECT_EQ(key.IsEc(), k->IsEc());
};
expect_roundtrip(PrivateKey::GenerateRsa2048());
expect_roundtrip(PrivateKey::GenerateRsa4096());
expect_roundtrip(PrivateKey::GenerateEcP256());
}
// Export a public key from each private key and ensure it matches the expected
// public key.
TEST(Keypair, ExportPublicKey) {
auto expect_export = [](const PrivateKey& priv, const PublicKey& pub) {
EXPECT_EQ(priv.ToSubjectPublicKeyInfo(), pub.ToSubjectPublicKeyInfo());
};
expect_export(FixedRsa2048PrivateKeyForTesting(),
FixedRsa2048PublicKeyForTesting());
expect_export(FixedRsa4096PrivateKeyForTesting(),
FixedRsa4096PublicKeyForTesting());
}
TEST(Keypair, ImportWithTrailingJunkFails) {
auto priv = FixedRsa2048PrivateKeyForTesting().ToPrivateKeyInfo();
auto pub = FixedRsa2048PublicKeyForTesting().ToSubjectPublicKeyInfo();
EXPECT_TRUE(PrivateKey::FromPrivateKeyInfo(priv));
priv.push_back(0);
EXPECT_FALSE(PrivateKey::FromPrivateKeyInfo(priv));
EXPECT_TRUE(PublicKey::FromSubjectPublicKeyInfo(pub));
pub.push_back(0);
EXPECT_FALSE(PublicKey::FromSubjectPublicKeyInfo(pub));
}
} // namespace
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