Examples with DeterministicAead com.google.crypto.tink.DeterministicAead used on opensource projects

Example 11 with DeterministicAead

use of com.google.crypto.tink.DeterministicAead in project tink by google.

the class AesSivTest method testModifiedAssociatedData.

private static void testModifiedAssociatedData(int keySize) throws GeneralSecurityException {
    byte[] key = Random.randBytes(keySize);
    DeterministicAead crypter = new AesSiv(key);
    byte[] plaintext = Random.randBytes(10);
    byte[] aad = Random.randBytes(10);
    byte[] ciphertext = crypter.encryptDeterministically(plaintext, aad);
    // Flipping bits of aad.
    for (int b = 0; b < aad.length; b++) {
        for (int bit = 0; bit < 8; bit++) {
            byte[] modified = Arrays.copyOf(aad, aad.length);
            modified[b] ^= (byte) (1 << bit);
            try {
                byte[] unused = crypter.decryptDeterministically(ciphertext, modified);
                fail("Decrypting modified aad should fail");
            } catch (AEADBadTagException ex) {
            // This is expected.
            }
        }
    }
}

Example 12 with DeterministicAead

use of com.google.crypto.tink.DeterministicAead in project tink by google.

the class DeterministicAeadFactoryTest method testEncrytDecrypt.

@Test
public void testEncrytDecrypt() throws Exception {
    KeysetHandle keysetHandle = KeysetHandle.generateNew(DeterministicAeadKeyTemplates.AES256_SIV);
    DeterministicAead aead = DeterministicAeadFactory.getPrimitive(keysetHandle);
    byte[] plaintext = Random.randBytes(20);
    byte[] associatedData = Random.randBytes(20);
    byte[] ciphertext = aead.encryptDeterministically(plaintext, associatedData);
    byte[] ciphertext2 = aead.encryptDeterministically(plaintext, associatedData);
    byte[] decrypted = aead.decryptDeterministically(ciphertext, associatedData);
    byte[] decrypted2 = aead.decryptDeterministically(ciphertext2, associatedData);
    assertArrayEquals(ciphertext, ciphertext2);
    assertArrayEquals(plaintext, decrypted);
    assertArrayEquals(plaintext, decrypted2);
}

Example 13 with DeterministicAead

use of com.google.crypto.tink.DeterministicAead in project tink by google.

the class DeterministicAeadFactoryTest method testSmallPlaintextWithRawKey.

private static void testSmallPlaintextWithRawKey(int keySize) throws Exception {
    Key primary = TestUtil.createKey(TestUtil.createAesSivKeyData(keySize), 42, KeyStatusType.ENABLED, OutputPrefixType.RAW);
    KeysetHandle keysetHandle = TestUtil.createKeysetHandle(TestUtil.createKeyset(primary));
    DeterministicAead daead = DeterministicAeadFactory.getPrimitive(keysetHandle);
    byte[] plaintext = Random.randBytes(1);
    byte[] associatedData = Random.randBytes(20);
    byte[] ciphertext = daead.encryptDeterministically(plaintext, associatedData);
    assertArrayEquals(plaintext, daead.decryptDeterministically(ciphertext, associatedData));
    assertEquals(CryptoFormat.RAW_PREFIX_SIZE + plaintext.length + 16, ciphertext.length);
}