Examples with EciesAeadHkdfPublicKey com.google.crypto.tink.proto.EciesAeadHkdfPublicKey used on opensource projects

Example 1 with EciesAeadHkdfPublicKey

use of com.google.crypto.tink.proto.EciesAeadHkdfPublicKey in project tink by google.

the class EciesAeadHkdfPrivateKeyManager method newKey.

/**
 * @param keyFormat {@code EciesAeadHkdfKeyFormat} proto
 * @return new {@code EciesAeadHkdfPrivateKey} proto
 */
@Override
public MessageLite newKey(MessageLite keyFormat) throws GeneralSecurityException {
    if (!(keyFormat instanceof EciesAeadHkdfKeyFormat)) {
        throw new GeneralSecurityException("expected EciesAeadHkdfKeyFormat proto");
    }
    EciesAeadHkdfKeyFormat eciesKeyFormat = (EciesAeadHkdfKeyFormat) keyFormat;
    HybridUtil.validate(eciesKeyFormat.getParams());
    EciesHkdfKemParams kemParams = eciesKeyFormat.getParams().getKemParams();
    KeyPair keyPair = EllipticCurves.generateKeyPair(HybridUtil.toCurveType(kemParams.getCurveType()));
    ECPublicKey pubKey = (ECPublicKey) keyPair.getPublic();
    ECPrivateKey privKey = (ECPrivateKey) keyPair.getPrivate();
    ECPoint w = pubKey.getW();
    // Creates EciesAeadHkdfPublicKey.
    EciesAeadHkdfPublicKey eciesPublicKey = EciesAeadHkdfPublicKey.newBuilder().setVersion(VERSION).setParams(eciesKeyFormat.getParams()).setX(ByteString.copyFrom(w.getAffineX().toByteArray())).setY(ByteString.copyFrom(w.getAffineY().toByteArray())).build();
    // Creates EciesAeadHkdfPrivateKey.
    return EciesAeadHkdfPrivateKey.newBuilder().setVersion(VERSION).setPublicKey(eciesPublicKey).setKeyValue(ByteString.copyFrom(privKey.getS().toByteArray())).build();
}

Example 2 with EciesAeadHkdfPublicKey

use of com.google.crypto.tink.proto.EciesAeadHkdfPublicKey in project tink by google.

the class EciesAeadHkdfPublicKeyManagerTest method createPrimitive.

@Test
public void createPrimitive() throws Exception {
    EciesAeadHkdfPrivateKey privateKey = createValidPrivateKey();
    HybridDecrypt hybridDecrypt = privateManager.getPrimitive(privateKey, HybridDecrypt.class);
    EciesAeadHkdfPublicKey publicKey = privateManager.getPublicKey(privateKey);
    HybridEncrypt hybridEncrypt = publicManager.getPrimitive(publicKey, HybridEncrypt.class);
    byte[] message = Random.randBytes(20);
    byte[] contextInfo = Random.randBytes(20);
    assertThat(hybridDecrypt.decrypt(hybridEncrypt.encrypt(message, contextInfo), contextInfo)).isEqualTo(message);
}

Example 3 with EciesAeadHkdfPublicKey

use of com.google.crypto.tink.proto.EciesAeadHkdfPublicKey in project tink by google.

the class EciesAeadHkdfPublicKeyManagerTest method validateKey_invalidWrongVersion_throws.

@Test
public void validateKey_invalidWrongVersion_throws() throws Exception {
    EciesAeadHkdfPrivateKey privateKey = createValidPrivateKey();
    EciesAeadHkdfPublicKey publicKey = privateManager.getPublicKey(privateKey);
    EciesAeadHkdfPublicKey invalidKey = EciesAeadHkdfPublicKey.newBuilder().setVersion(1).build();
    assertThrows(GeneralSecurityException.class, () -> publicManager.validateKey(invalidKey));
}

Example 4 with EciesAeadHkdfPublicKey

use of com.google.crypto.tink.proto.EciesAeadHkdfPublicKey in project tink by google.

the class TestUtil method generateEciesAeadHkdfPrivKey.

/**
 * @return a freshly generated {@code EciesAeadHkdfPrivateKey} constructed with specified
 *     parameters.
 */
public static EciesAeadHkdfPrivateKey generateEciesAeadHkdfPrivKey(EllipticCurveType curve, HashType hashType, EcPointFormat pointFormat, KeyTemplate demKeyTemplate, byte[] salt) throws Exception {
    ECParameterSpec ecParams;
    switch(curve) {
        case NIST_P256:
            ecParams = EllipticCurves.getNistP256Params();
            break;
        case NIST_P384:
            ecParams = EllipticCurves.getNistP384Params();
            break;
        case NIST_P521:
            ecParams = EllipticCurves.getNistP521Params();
            break;
        default:
            throw new NoSuchAlgorithmException("Curve not implemented:" + curve);
    }
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("EC");
    keyGen.initialize(ecParams);
    KeyPair keyPair = keyGen.generateKeyPair();
    ECPublicKey pubKey = (ECPublicKey) keyPair.getPublic();
    ECPrivateKey privKey = (ECPrivateKey) keyPair.getPrivate();
    ECPoint w = pubKey.getW();
    EciesAeadHkdfPublicKey eciesPubKey = createEciesAeadHkdfPubKey(curve, hashType, pointFormat, demKeyTemplate, w.getAffineX().toByteArray(), w.getAffineY().toByteArray(), salt);
    return createEciesAeadHkdfPrivKey(eciesPubKey, privKey.getS().toByteArray());
}

Example 5 with EciesAeadHkdfPublicKey

use of com.google.crypto.tink.proto.EciesAeadHkdfPublicKey in project tink by google.

the class EciesAeadHkdfPublicKeyManager method getPrimitive.

/**
 * @param recipientKey {@code EciesAeadHkdfPublicKey} proto
 */
@Override
public HybridEncrypt getPrimitive(MessageLite recipientKey) throws GeneralSecurityException {
    if (!(recipientKey instanceof EciesAeadHkdfPublicKey)) {
        throw new GeneralSecurityException("expected EciesAeadHkdfPublicKey proto");
    }
    EciesAeadHkdfPublicKey recipientKeyProto = (EciesAeadHkdfPublicKey) recipientKey;
    validate(recipientKeyProto);
    EciesAeadHkdfParams eciesParams = recipientKeyProto.getParams();
    EciesHkdfKemParams kemParams = eciesParams.getKemParams();
    ECPublicKey recipientPublicKey = EllipticCurves.getEcPublicKey(HybridUtil.toCurveType(kemParams.getCurveType()), recipientKeyProto.getX().toByteArray(), recipientKeyProto.getY().toByteArray());
    EciesAeadHkdfDemHelper demHelper = new RegistryEciesAeadHkdfDemHelper(eciesParams.getDemParams().getAeadDem());
    return new EciesAeadHkdfHybridEncrypt(recipientPublicKey, kemParams.getHkdfSalt().toByteArray(), HybridUtil.toHmacAlgo(kemParams.getHkdfHashType()), HybridUtil.toPointFormatType(eciesParams.getEcPointFormat()), demHelper);
}