Java Web项目如何加上License
这个有成熟的开源产品吗 有做过的吗 求助
[最优解释]
public abstract class MyRSACoder {
public static final String KEY_ALGORITHM = "RSA";
public static final String KEY_PROVIDER = "BC";
public static final String SIGNATURE_ALGORITHM = "SHA1WithRSA";
/**
* 初始化密钥对
*/
public static Map<String, Object> initKeys(String seed) throws Exception {
Map<String, Object> keyMap = new HashMap<String, Object>();
Security.addProvider(new BouncyCastleProvider());
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(KEY_ALGORITHM,KEY_PROVIDER);
keyPairGenerator.initialize(1024,new SecureRandom(seed.getBytes()));
KeyPair pair = keyPairGenerator.generateKeyPair();
RSAPublicKey rsaPublicKey = (RSAPublicKey) pair.getPublic();
RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) pair.getPrivate();
KeyFactory factory = KeyFactory.getInstance(KEY_ALGORITHM,KEY_PROVIDER);
RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(rsaPublicKey.getModulus().toString()),new BigInteger(rsaPublicKey.getPublicExponent().toString()));
RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(new BigInteger(rsaPrivateKey.getModulus().toString()),new BigInteger(rsaPrivateKey.getPrivateExponent().toString()));
PublicKey publicKey = factory.generatePublic(pubKeySpec);
PrivateKey privateKey = factory.generatePrivate(priKeySpec);
System.out.println("公钥：" + pubKeySpec.getModulus() + "----" + pubKeySpec.getPublicExponent());
System.out.println("私钥：" + priKeySpec.getModulus() + "----" + priKeySpec.getPrivateExponent());
keyMap.put("publicKey", publicKey);
keyMap.put("privateKey", privateKey);
return keyMap;
}
/**
* 私钥加密
* */
public static byte[] encryptRSA(byte[] data,PrivateKey privateKey) throws Exception {
Cipher cipher = Cipher.getInstance(KEY_ALGORITHM,KEY_PROVIDER);
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
int dataSize = cipher.getOutputSize(data.length);
int blockSize = cipher.getBlockSize();
int blockNum = 0;
if (data.length % blockSize == 0) {
blockNum = data.length / blockSize;
} else {
blockNum = data.length / blockSize + 1;
}
byte[] raw = new byte[dataSize * blockNum];
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize) {
cipher.doFinal(data, i * blockSize, blockSize, raw, i * dataSize);
} else {
cipher.doFinal(data, i * blockSize, data.length - i * blockSize, raw, i * dataSize);
}
i++;
}
return raw;
}
/**
* 生成数字签名
* */
public static String sign(byte[] encoderData,PrivateKey privateKey) throws Exception {
Signature sig = Signature.getInstance(SIGNATURE_ALGORITHM,KEY_PROVIDER);
sig.initSign(privateKey);
sig.update(encoderData);
return new String(Base64.encode(sig.sign()));
}
/**
* 校验数字签名
* */
public static boolean verify (byte[] encoderData,String sign,PublicKey publicKey) throws Exception {
Signature sig = Signature.getInstance(SIGNATURE_ALGORITHM,KEY_PROVIDER);
sig.initVerify(publicKey);
sig.update(encoderData);
return sig.verify(Base64.decode(sign));
}
ublic class MyRSACoderTest {
public static void main(String[] args) throws Exception {
Map<String, Object> keyMap = MyRSACoder.initKeys("0");
PublicKey publicKey = (PublicKey) keyMap.get("publicKey");
PrivateKey privateKey = (PrivateKey) keyMap.get("privateKey");
String str = "您好！";
byte[] encoderData = MyRSACoder.encryptRSA(str.getBytes(), privateKey);
String sign = MyRSACoder.sign(encoderData, privateKey);
boolean status = MyRSACoder.verify(encoderData, sign, publicKey);
System.out.println("原文：" + str);
System.out.println("密文：" + new String(encoderData));
System.out.println("签名：" + sign);
System.out.println("验证结果：" + status);
}
}
