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Merge "Keymint: Test that corrupting the signature for HMAC verification fails" am: 924613950c am: 309c32adb7 am: a7ee9f53ed

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Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1915101

Change-Id: Ia7c7155bbee6e7f4cd602415c785bb201a9d7937
This commit is contained in:
Eran Messeri 2021-12-13 16:51:40 +00:00 committed by Automerger Merge Worker
commit 4a9da1da1a
1 changed files with 52 additions and 0 deletions
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52
security/keymint/aidl/vts/functional/KeyMintTest.cpp
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@ -3151,6 +3151,58 @@ TEST_P(VerificationOperationsTest, HmacSigningKeyCannotVerify) {
CheckedDeleteKey(&verification_key);
}
/*
* VerificationOperationsTest.HmacVerificationFailsForCorruptSignature
*
* Verifies HMAC signature verification should fails if message or signature is corrupted.
*/
TEST_P(VerificationOperationsTest, HmacVerificationFailsForCorruptSignature) {
string key_material = "HelloThisIsAKey";
vector<uint8_t> signing_key, verification_key;
vector<KeyCharacteristics> signing_key_chars, verification_key_chars;
EXPECT_EQ(ErrorCode::OK,
ImportKey(AuthorizationSetBuilder()
.Authorization(TAG_NO_AUTH_REQUIRED)
.Authorization(TAG_ALGORITHM, Algorithm::HMAC)
.Authorization(TAG_PURPOSE, KeyPurpose::SIGN)
.Digest(Digest::SHA_2_256)
.Authorization(TAG_MIN_MAC_LENGTH, 160),
KeyFormat::RAW, key_material, &signing_key, &signing_key_chars));
EXPECT_EQ(ErrorCode::OK,
ImportKey(AuthorizationSetBuilder()
.Authorization(TAG_NO_AUTH_REQUIRED)
.Authorization(TAG_ALGORITHM, Algorithm::HMAC)
.Authorization(TAG_PURPOSE, KeyPurpose::VERIFY)
.Digest(Digest::SHA_2_256)
.Authorization(TAG_MIN_MAC_LENGTH, 160),
KeyFormat::RAW, key_material, &verification_key, &verification_key_chars));
string message = "This is a message.";
string signature = SignMessage(
signing_key, message,
AuthorizationSetBuilder().Digest(Digest::SHA_2_256).Authorization(TAG_MAC_LENGTH, 160));
AuthorizationSet begin_out_params;
ASSERT_EQ(ErrorCode::OK,
Begin(KeyPurpose::VERIFY, verification_key,
AuthorizationSetBuilder().Digest(Digest::SHA_2_256), &begin_out_params));
string corruptMessage = "This is b message."; // Corrupted message
string output;
EXPECT_EQ(ErrorCode::VERIFICATION_FAILED, Finish(corruptMessage, signature, &output));
ASSERT_EQ(ErrorCode::OK,
Begin(KeyPurpose::VERIFY, verification_key,
AuthorizationSetBuilder().Digest(Digest::SHA_2_256), &begin_out_params));
signature[0] += 1; // Corrupt a signature
EXPECT_EQ(ErrorCode::VERIFICATION_FAILED, Finish(message, signature, &output));
CheckedDeleteKey(&signing_key);
CheckedDeleteKey(&verification_key);
}
INSTANTIATE_KEYMINT_AIDL_TEST(VerificationOperationsTest);
typedef KeyMintAidlTestBase ExportKeyTest;