我想使用Edwards曲线" Curve41417" (safecurves)用于生成密钥对。
现在我已将其转换为Weierstrass格式并尝试以下源代码:
public class Test {
public static void main(String[] args) {
try {
KeyPairGenerator keyGen = null;
keyGen = KeyPairGenerator.getInstance("ECDSA", "LunaProvider");
// Create a secure random number generator using the SHA1PRNG algorithm
SecureRandom secureRandomGenerator = SecureRandom.getInstance("SHA1PRNG");
//generator with the given parameter set and source of randomness
keyGen.initialize(curve41417InHex(),secureRandomGenerator);
//keyGen.initialize(ecSpec);
KeyPair keyPair = keyGen.generateKeyPair();
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchProviderException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch (InvalidAlgorithmParameterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static ECParameterSpec curve41417InHex(){
ECPoint point = new ECPoint(
// gx
new BigInteger("36AF93BFF765C2150A948827D97CF68F5F83E0D0C7411AE313A89ABF50224BBAE8C2F76271040290884CF5629DAB279D49AB0F98",16),
// gy
new BigInteger("1952C13B138703B04EA0D313944A8B1E9AE7882380AD83907F12F2A937C2503ADA9E6BF01CA1F76FDF9032C79F130EB2BEA4C102",16));
final ECParameterSpec curve41417 = new ECParameterSpec(
new EllipticCurve(
// field the finite field that this elliptic curve is over.
new ECFieldFp(new BigInteger("3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF",16)),
// a : the first coefficient of this elliptic curve.
new BigInteger("3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBD324",16),
// b : the second coefficient of this elliptic curve.
new BigInteger("3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC3EC75",16)
),
point,
// Order n
new BigInteger("7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEB3CC92414CF706022B36F1C0338AD63CF181B0E71A5E106AF79",16),
// Cofactor
8);
return curve41417;
}
}
上一个源代码的输出为:密钥生成期间的异常 - 不支持的曲线:java.security.spec.ECParameterSpec@43814d18
我相信我在从蒙哥马利到Weierstrass等式的转换中做错了,或者我没有使用适当的类来提供自定义EC参数。
有人已成功使用自定义EC参数进行密钥对生成吗?也许对于另一个蒙哥马利或爱德华兹曲线?