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explanation009:
贴了一堆外星文上来。。一点注释也没!!!
web service build.xml -
kulinglei:
谢了,我收藏了
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Sunshine168:
比较集中,先收藏着!也许将来有用。。。。
sql 2000最多可建多少个数据库
关键字: ecc, 椭圆曲线加密, 非对称加密
ECC
ECC-Elliptic Curves Cryptography,椭圆曲线密码编码学,是目前已知的公钥体制中,对每比特所提供加密强度最高的一种体制。在软件注册保护方面起到很大的作用,一般的序列号通常由该算法产生。
当我开始整理《Java加密技术(二)》的时候,我就已经在开始研究ECC了,但是关于Java实现ECC算法的资料实在是太少了,无论是国内还是国外的资料,无论是官方还是非官方的解释,最终只有一种答案——ECC算法在jdk1.5后加入支持,目前仅仅只能完成密钥的生成与解析,对于通过密钥对数据进行处理的java实现仅在javacard项目中使用。 这已经是另一个领域了,完全跳出了J2SE的范畴,我就不再继续追根溯源了。
尽管如此,我照旧提供相应的Java实现代码,以供大家参考。
通过java代码实现如下:Coder类见 java加密技术(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 sun.security.ec.ECKeyFactory;
import sun.security.ec.ECPrivateKeyImpl;
import sun.security.ec.ECPublicKeyImpl;
/**
* ECC安全编码组件
*
* @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);
// 取得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
ECPrivateKey priKey = (ECPrivateKey) privateKey;
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(priKey.getS(),
priKey.getParams());
// 对数据解密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = 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);
// 取得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key publicKey = keyFactory.generatePublic(x509KeySpec);
ECPublicKey pubKey = (ECPublicKey) publicKey;
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(pubKey.getW(),
pubKey.getParams());
// 对数据加密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = Cipher.getInstance(ALGORITHM, keyFactory.getProvider());
cipher.init(Cipher.ENCRYPT_MODE, pubKey, ecPublicKeySpec.getParams());
return cipher.doFinal(data);
}
/**
* 取得私钥
*
* @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());
}
/**
* 取得公钥
*
* @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;
}
}
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 sun.security.ec.ECKeyFactory;
import sun.security.ec.ECPrivateKeyImpl;
import sun.security.ec.ECPublicKeyImpl;
/**
* ECC安全编码组件
*
* @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);
// 取得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
ECPrivateKey priKey = (ECPrivateKey) privateKey;
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(priKey.getS(),
priKey.getParams());
// 对数据解密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = 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);
// 取得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key publicKey = keyFactory.generatePublic(x509KeySpec);
ECPublicKey pubKey = (ECPublicKey) publicKey;
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(pubKey.getW(),
pubKey.getParams());
// 对数据加密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = Cipher.getInstance(ALGORITHM, keyFactory.getProvider());
cipher.init(Cipher.ENCRYPT_MODE, pubKey, ecPublicKeySpec.getParams());
return cipher.doFinal(data);
}
/**
* 取得私钥
*
* @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());
}
/**
* 取得公钥
*
* @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;
}
}
请注意上述代码中的TODO内容,再次提醒注意,Chipher不支持EC算法 ,以上代码仅供参考。Chipher、Signature、KeyPairGenerator、KeyAgreement、SecretKey均不支持EC算法。
照旧提供一个测试类:
Java代码
import static org.junit.Assert.*;
import java.math.BigInteger;
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.util.Map;
import org.junit.Test;
/**
*
* @author 梁栋
* @version 1.0
* @since 1.0
*/
public class ECCCoderTest {
@Test
public void test() throws Exception {
String inputStr = "abc";
byte[] data = inputStr.getBytes();
Map<String, Object> keyMap = ECCCoder.initKey();
String publicKey = ECCCoder.getPublicKey(keyMap);
String privateKey = ECCCoder.getPrivateKey(keyMap);
System.err.println("公钥: \n" + publicKey);
System.err.println("私钥: \n" + privateKey);
byte[] encodedData = ECCCoder.encrypt(data, publicKey);
byte[] decodedData = ECCCoder.decrypt(encodedData, privateKey);
String outputStr = new String(decodedData);
System.err.println("加密前: " + inputStr + "\n\r" + "解密后: " + outputStr);
assertEquals(inputStr, outputStr);
}
}
import static org.junit.Assert.*;
import java.math.BigInteger;
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.util.Map;
import org.junit.Test;
/**
*
* @author 梁栋
* @version 1.0
* @since 1.0
*/
public class ECCCoderTest {
@Test
public void test() throws Exception {
String inputStr = "abc";
byte[] data = inputStr.getBytes();
Map<String, Object> keyMap = ECCCoder.initKey();
String publicKey = ECCCoder.getPublicKey(keyMap);
String privateKey = ECCCoder.getPrivateKey(keyMap);
System.err.println("公钥: \n" + publicKey);
System.err.println("私钥: \n" + privateKey);
byte[] encodedData = ECCCoder.encrypt(data, publicKey);
byte[] decodedData = ECCCoder.decrypt(encodedData, privateKey);
String outputStr = new String(decodedData);
System.err.println("加密前: " + inputStr + "\n\r" + "解密后: " + outputStr);
assertEquals(inputStr, outputStr);
}
}
ECC
ECC-Elliptic Curves Cryptography,椭圆曲线密码编码学,是目前已知的公钥体制中,对每比特所提供加密强度最高的一种体制。在软件注册保护方面起到很大的作用,一般的序列号通常由该算法产生。
当我开始整理《Java加密技术(二)》的时候,我就已经在开始研究ECC了,但是关于Java实现ECC算法的资料实在是太少了,无论是国内还是国外的资料,无论是官方还是非官方的解释,最终只有一种答案——ECC算法在jdk1.5后加入支持,目前仅仅只能完成密钥的生成与解析,对于通过密钥对数据进行处理的java实现仅在javacard项目中使用。 这已经是另一个领域了,完全跳出了J2SE的范畴,我就不再继续追根溯源了。
尽管如此,我照旧提供相应的Java实现代码,以供大家参考。
通过java代码实现如下:Coder类见 java加密技术(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 sun.security.ec.ECKeyFactory;
import sun.security.ec.ECPrivateKeyImpl;
import sun.security.ec.ECPublicKeyImpl;
/**
* ECC安全编码组件
*
* @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);
// 取得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
ECPrivateKey priKey = (ECPrivateKey) privateKey;
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(priKey.getS(),
priKey.getParams());
// 对数据解密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = 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);
// 取得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key publicKey = keyFactory.generatePublic(x509KeySpec);
ECPublicKey pubKey = (ECPublicKey) publicKey;
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(pubKey.getW(),
pubKey.getParams());
// 对数据加密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = Cipher.getInstance(ALGORITHM, keyFactory.getProvider());
cipher.init(Cipher.ENCRYPT_MODE, pubKey, ecPublicKeySpec.getParams());
return cipher.doFinal(data);
}
/**
* 取得私钥
*
* @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());
}
/**
* 取得公钥
*
* @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;
}
}
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 sun.security.ec.ECKeyFactory;
import sun.security.ec.ECPrivateKeyImpl;
import sun.security.ec.ECPublicKeyImpl;
/**
* ECC安全编码组件
*
* @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);
// 取得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
ECPrivateKey priKey = (ECPrivateKey) privateKey;
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(priKey.getS(),
priKey.getParams());
// 对数据解密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = 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);
// 取得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = ECKeyFactory.INSTANCE;
Key publicKey = keyFactory.generatePublic(x509KeySpec);
ECPublicKey pubKey = (ECPublicKey) publicKey;
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(pubKey.getW(),
pubKey.getParams());
// 对数据加密
// TODO Chipher不支持EC算法 未能实现
Cipher cipher = Cipher.getInstance(ALGORITHM, keyFactory.getProvider());
cipher.init(Cipher.ENCRYPT_MODE, pubKey, ecPublicKeySpec.getParams());
return cipher.doFinal(data);
}
/**
* 取得私钥
*
* @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());
}
/**
* 取得公钥
*
* @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;
}
}
请注意上述代码中的TODO内容,再次提醒注意,Chipher不支持EC算法 ,以上代码仅供参考。Chipher、Signature、KeyPairGenerator、KeyAgreement、SecretKey均不支持EC算法。
照旧提供一个测试类:
Java代码
import static org.junit.Assert.*;
import java.math.BigInteger;
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.util.Map;
import org.junit.Test;
/**
*
* @author 梁栋
* @version 1.0
* @since 1.0
*/
public class ECCCoderTest {
@Test
public void test() throws Exception {
String inputStr = "abc";
byte[] data = inputStr.getBytes();
Map<String, Object> keyMap = ECCCoder.initKey();
String publicKey = ECCCoder.getPublicKey(keyMap);
String privateKey = ECCCoder.getPrivateKey(keyMap);
System.err.println("公钥: \n" + publicKey);
System.err.println("私钥: \n" + privateKey);
byte[] encodedData = ECCCoder.encrypt(data, publicKey);
byte[] decodedData = ECCCoder.decrypt(encodedData, privateKey);
String outputStr = new String(decodedData);
System.err.println("加密前: " + inputStr + "\n\r" + "解密后: " + outputStr);
assertEquals(inputStr, outputStr);
}
}
import static org.junit.Assert.*;
import java.math.BigInteger;
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.util.Map;
import org.junit.Test;
/**
*
* @author 梁栋
* @version 1.0
* @since 1.0
*/
public class ECCCoderTest {
@Test
public void test() throws Exception {
String inputStr = "abc";
byte[] data = inputStr.getBytes();
Map<String, Object> keyMap = ECCCoder.initKey();
String publicKey = ECCCoder.getPublicKey(keyMap);
String privateKey = ECCCoder.getPrivateKey(keyMap);
System.err.println("公钥: \n" + publicKey);
System.err.println("私钥: \n" + privateKey);
byte[] encodedData = ECCCoder.encrypt(data, publicKey);
byte[] decodedData = ECCCoder.decrypt(encodedData, privateKey);
String outputStr = new String(decodedData);
System.err.println("加密前: " + inputStr + "\n\r" + "解密后: " + outputStr);
assertEquals(inputStr, outputStr);
}
}
发表评论
-
JAVA加密算法6
2009-05-11 12:09 1376关键字: dsa, 公钥, 私钥, 数字签名, 非对称加密 ... -
JAVA加密算法5
2009-05-11 12:08 1725关键字: dh, 公钥, 私钥, 非对称加密, 密钥一致协议 ... -
JAVA加密算法4
2009-05-11 12:08 2631关键字: rsa, 公钥, 私钥, 非对称加密 接下 ... -
JAVA加密算法3
2009-05-11 12:07 1801除了DES,我们还知道有DESede(TripleDES,就是 ... -
JAVA加密算法2
2009-05-11 12:06 1788接下来我们介绍对称加密算法,最常用的莫过于DES数据加密算法。 ... -
JAVA加密算法1
2009-05-11 12:05 2404如基本的单向加密算法: BASE64 MD5(Messa ... -
DES加密算法源码
2008-12-04 17:46 3927public class DES { // 声明 ... -
MD5摘要算法源码
2008-12-04 17:44 1098public class MD5 { pri ... -
SHA-1摘要算法源码
2008-12-04 17:44 1644public class SHA1 { private ... -
一个非常简单的私有加密算法
2008-12-04 17:43 1513public class ZYGEncrypt { ... -
Base64 加密算法源码
2008-12-04 17:42 1090[code="java"public cl ... -
JS(MD5和SHA1两种加密方式 )
2008-12-04 17:41 15362SHA1算法原理 1 SHA1算法 ...
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