InvalidKeyException 使用 ECPublicKey

Question

当我尝试使用 EC public 密钥加密字节数组时出现以下异常：

java.security.InvalidKeyException: No installed provider supports this key:
sun.security.ec.ECPublicKeyImpl

当我调用 Cipher.init() 时会生成此异常。下面几行显示了我在我的程序中做了什么：

ECPublicKey publicKey ;
ECPrivateKey privateKey;

//Generating key paire (public and private keys) 
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("EC", "SunEC");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");

    keyGen.initialize(571, random);
    KeyPair pair = keyGen.generateKeyPair();
    privateKey = (ECPrivateKey) pair.getPrivate();
    publicKey = (ECPublicKey) pair.getPublic();

// get an AES cipher object with CTR encription mode 
   Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding");

// encrypt the sharedSecret using the public key
   cipher.init(Cipher.ENCRYPT_MODE, publicKey);**
   byte[] result = cipher.doFinal(data);

我必须添加提供商才能支持此 public 密钥吗？？

Answer 1

终于找到了这个异常的根源。问题是密码的初始化：

//This is the wrong initialization
Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding");

//This is the right initialization
Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding","SunJCE");

但是现在，我有另一个例外（它不如前一个重要）：

java.security.InvalidKeyException: Invalid AES key length: 170 bytes

那么我现在必须使用什么作为 ECDSA public 密钥的加密算法？

InvalidKeyException 使用 ECPublicKey

InvalidKeyException using ECPublicKey

java

encryption

cryptography