椭圆曲线与BouncyCastle的数字签名算法(ECDSA)实现 [英] Elliptic Curve with Digital Signature Algorithm (ECDSA) implementation on BouncyCastle
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问题描述
我试图实现ECDSA(椭圆曲线数字签名算法),但我没有找到任何使用Bouncy城堡的Java中的例子。我创建了密钥,但我真的不知道应该使用什么样的函数来创建签名并验证它。
I am trying to implement ECDSA (Elliptic Curve Digital Signature Algorithm) but I couldn't find any examples in Java which use Bouncy Castle. I created the keys, but I really don't know what kind of functions I should use to create a signature and verify it.
public static KeyPair GenerateKeys()
throws NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException
{
ECParameterSpec ecSpec = ECNamedCurveTable.getParameterSpec("B-571");
KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "BC");
g.initialize(ecSpec, new SecureRandom());
return g.generateKeyPair();
}
推荐答案
owlstead是正确的。再详细说明一下,您可以这样做:
owlstead is correct. And to elaborate a bit more, you can do this:
KeyPair pair = GenerateKeys();
Signature ecdsaSign = Signature.getInstance("SHA256withECDSA", "BC");
ecdsaSign.initSign(pair.getPrivate());
ecdsaSign.update(plaintext.getBytes("UTF-8"));
byte[] signature = ecdsaSign.sign();
并验证:
Signature ecdsaVerify = Signature.getInstance("SHA256withECDSA", "BC");
ecdsaVerify.initVerify(pair.getPublic());
ecdsaVerify.update(plaintext.getBytes("UTF-8"));
boolean result = ecdsaVerify.verify(signature);
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