当我尝试使用EC公钥加密字节数组时,我收到以下异常:
java.security.InvalidKeyException:没有安装的提供程序支持此功能 键: sun.security.ec.ECPublicKeyImpl
当我呼叫Cipher.init()
时会生成此异常。下面的行显示了我在程序中所做的事情:
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);
我必须添加一个提供程序来支持此公钥吗?
答案 0 :(得分:0)
最后,我找到了这个例外的来源。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,我还有另外一个例外(它不像前一个那么重要):
java.security.InvalidKeyException: Invalid AES key length: 170 bytes
那么我现在必须使用哪种加密算法和ECDSA公钥?
答案 1 :(得分:0)
ECDSA不用于加密 而是使用RSA / Symetric密码
答案 2 :(得分:0)
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