Examples with DHPublicKey javax.crypto.interfaces.DHPublicKey used on opensource projects

Example 26 with DHPublicKey

use of javax.crypto.interfaces.DHPublicKey in project Bytecoder by mirkosertic.

the class DHCrypt method checkConstraints.

// Check constraints of the specified DH public key.
void checkConstraints(AlgorithmConstraints constraints, BigInteger peerPublicValue) throws SSLHandshakeException {
    try {
        KeyFactory kf = JsseJce.getKeyFactory("DiffieHellman");
        DHPublicKeySpec spec = new DHPublicKeySpec(peerPublicValue, modulus, base);
        DHPublicKey publicKey = (DHPublicKey) kf.generatePublic(spec);
        // check constraints of DHPublicKey
        if (!constraints.permits(EnumSet.of(CryptoPrimitive.KEY_AGREEMENT), publicKey)) {
            throw new SSLHandshakeException("DHPublicKey does not comply to algorithm constraints");
        }
    } catch (GeneralSecurityException gse) {
        throw (SSLHandshakeException) new SSLHandshakeException("Could not generate DHPublicKey").initCause(gse);
    }
}

Example 27 with DHPublicKey

use of javax.crypto.interfaces.DHPublicKey in project protools by SeanDragon.

the class ToolDH method initKey.

/**
 * 初始化甲方密钥
 *
 * @return Map 甲方密钥Map
 *
 * @throws Exception
 */
public static Map<String, Object> initKey() throws NoSuchAlgorithmException {
    // 实例化密钥对生成器
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(KEY_ALGORITHM);
    // 初始化密钥对生成器
    keyPairGenerator.initialize(KEY_SIZE);
    // 生成密钥对
    KeyPair keyPair = keyPairGenerator.generateKeyPair();
    // 甲方公钥
    DHPublicKey publicKey = (DHPublicKey) keyPair.getPublic();
    // 甲方私钥
    DHPrivateKey privateKey = (DHPrivateKey) keyPair.getPrivate();
    // 将密钥对存储在Map中
    Map<String, Object> keyMap = Maps.newHashMapWithExpectedSize(2);
    keyMap.put(PUBLIC_KEY, publicKey);
    keyMap.put(PRIVATE_KEY, privateKey);
    return keyMap;
}

Example 28 with DHPublicKey

use of javax.crypto.interfaces.DHPublicKey in project Gradle-demo by Arisono.

the class DHUtil method initKey.

/**
 * 乙方根据甲方公钥初始化并返回密钥对
 */
public static Map<String, Object> initKey(byte[] key) throws Exception {
    // 将甲方公钥从字节数组转换为publicKey
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(key);
    // 实例化密钥工厂
    KeyFactory keyFactory = KeyFactory.getInstance("DH");
    // 产生甲方公钥pubKey
    DHPublicKey dhPublicKey = (DHPublicKey) keyFactory.generatePublic(keySpec);
    // 剖析甲方公钥，得到其参数
    DHParameterSpec dhParameterSpec = dhPublicKey.getParams();
    // 实例化密钥对生成器
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("DH");
    // 用甲方公钥初始化密钥对生成器
    keyPairGenerator.initialize(dhParameterSpec);
    // 产生密钥对
    KeyPair keyPair = keyPairGenerator.generateKeyPair();
    // 得到乙方公钥
    DHPublicKey publicKey = (DHPublicKey) keyPair.getPublic();
    // 得到乙方私钥
    DHPrivateKey privateKey = (DHPrivateKey) keyPair.getPrivate();
    // 将公钥和私钥封装到Map中，方便以后使用
    Map<String, Object> keyMap = new HashMap<String, Object>();
    keyMap.put(PUBLIC_KEY, publicKey);
    keyMap.put(PRIVATE_KEY, privateKey);
    return keyMap;
}