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你说是sun公司对她研究的透还是微软?针对自己工具开发的.net网页编程性能上肯定会站上风的。
ECC
ECC-EllipticCurvesCryptography,椭圆曲线暗码编码学,是今朝已知的公钥体系体例中,对每比特所供应加密强度最高的一种体系体例。在软件注册回护方面起到很年夜的感化,一样平常的序列号一般由该算法发生。
当我入手下手收拾《Java加密手艺(二)》的时分,我就已在入手下手研讨ECC了,可是关于Java完成ECC算法的材料其实是太少了,不管是国际仍是外洋的材料,不管是官方仍是非官方的注释,终极只要一种谜底——ECC算法在jdk1.5后到场撑持,今朝仅仅只能完成密钥的天生与剖析。
只管云云,我依旧供应响应的Java完成代码,以供人人参考。
经由过程java代码完成以下:Coder类见Java加密手艺(一)
Java代码
import java.math.BigInteger;
import java.security.Key;
import java.security.KeyFactory;
import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECFieldF2m;
import java.security.spec.ECParameterSpec;
import java.security.spec.ECPoint;
import java.security.spec.ECPrivateKeySpec;
import java.security.spec.ECPublicKeySpec;
import java.security.spec.EllipticCurve;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;
import javax.crypto.Cipher;
import javax.crypto.NullCipher;
import sun.security.ec.ECKeyFactory;
import sun.security.ec.ECPrivateKeyImpl;
import sun.security.ec.ECPublicKeyImpl;
/**
* ECC平安编码组件
*
* @author 梁栋
* @version 1.0
* @since 1.0
*/
public abstract class ECCCoder extends Coder {
public static final String ALGORITHM = "EC";
private static final String PUBLIC_KEY = "ECCPublicKey";
private static final String PRIVATE_KEY = "ECCPrivateKey";
/**
* 解密<br>
* 用私钥解密
*
* @param data
* @param key
* @return
* @throws Exception
*/
public static byte[] decrypt(byte[] data, String key) throws Exception {
// 对密钥解密
byte[] keyBytes = decryptBASE64(key);
// 获得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
ECPrivateKey priKey = (ECPrivateKey) keyFactory
.generatePrivate(pkcs8KeySpec);
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(priKey.getS(),
priKey.getParams());
// 对数据解密
// TODO Chipher不撑持EC算法 未能完成
Cipher cipher = new NullCipher();
// Cipher.getInstance(ALGORITHM, keyFactory.getProvider());
cipher.init(Cipher.DECRYPT_MODE, priKey, ecPrivateKeySpec.getParams());
return cipher.doFinal(data);
}
/**
* 加密<br>
* 用公钥加密
*
* @param data
* @param privateKey
* @return
* @throws Exception
*/
public static byte[] encrypt(byte[] data, String privateKey)
throws Exception {
// 对公钥解密
byte[] keyBytes = decryptBASE64(privateKey);
// 获得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
ECPublicKey pubKey = (ECPublicKey) keyFactory
.generatePublic(x509KeySpec);
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(pubKey.getW(),
pubKey.getParams());
// 对数据加密
// TODO Chipher不撑持EC算法 未能完成
Cipher cipher = new NullCipher();
// Cipher.getInstance(ALGORITHM, keyFactory.getProvider());
cipher.init(Cipher.ENCRYPT_MODE, pubKey, ecPublicKeySpec.getParams());
return cipher.doFinal(data);
}
/**
* 获得私钥
*
* @param keyMap
* @return
* @throws Exception
*/
public static String getPrivateKey(Map<String, Object> keyMap)
throws Exception {
Key key = (Key) keyMap.get(PRIVATE_KEY);
return encryptBASE64(key.getEncoded());
}
/**
* 获得公钥
*
* @param keyMap
* @return
* @throws Exception
*/
public static String getPublicKey(Map<String, Object> keyMap)
throws Exception {
Key key = (Key) keyMap.get(PUBLIC_KEY);
return encryptBASE64(key.getEncoded());
}
/**
* 初始化密钥
*
* @return
* @throws Exception
*/
public static Map<String, Object> initKey() throws Exception {
BigInteger x1 = new BigInteger(
"2fe13c0537bbc11acaa07d793de4e6d5e5c94eee8", 16);
BigInteger x2 = new BigInteger(
"289070fb05d38ff58321f2e800536d538ccdaa3d9", 16);
ECPoint g = new ECPoint(x1, x2);
// the order of generator
BigInteger n = new BigInteger(
"5846006549323611672814741753598448348329118574063", 10);
// the cofactor
int h = 2;
int m = 163;
int[] ks = { 7, 6, 3 };
ECFieldF2m ecField = new ECFieldF2m(m, ks);
// y^2+xy=x^3+x^2+1
BigInteger a = new BigInteger("1", 2);
BigInteger b = new BigInteger("1", 2);
EllipticCurve ellipticCurve = new EllipticCurve(ecField, a, b);
ECParameterSpec ecParameterSpec = new ECParameterSpec(ellipticCurve, g,
n, h);
// 公钥
ECPublicKey publicKey = new ECPublicKeyImpl(g, ecParameterSpec);
BigInteger s = new BigInteger(
"1234006549323611672814741753598448348329118574063", 10);
// 私钥
ECPrivateKey privateKey = new ECPrivateKeyImpl(s, ecParameterSpec);
Map<String, Object> keyMap = new HashMap<String, Object>(2);
keyMap.put(PUBLIC_KEY, publicKey);
keyMap.put(PRIVATE_KEY, privateKey);
return keyMap;
}
}
<p>
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