/**
* 这个方法用于生成密钥,如果已经有密钥了就不需要在调用方法生成了
*
* @return
* @throws Exception
*/
public static Map<String, String> initKey() throws Exception {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
keyPairGen.initialize(KEY_SIZE);
KeyPair keyPair = keyPairGen.generateKeyPair();
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
Map<String, String> keyMap = new HashMap<String, String>();
keyMap.put(PRIVATE_KEY, Base64.encodeBase64String(privateKey.getEncoded()));
keyMap.put(PUBLIC_KEY, Base64.encodeBase64String(publicKey.getEncoded()));
return keyMap;
}
protected static void test() throws Exception {
final HashMap<String, Object> map = RSAUtils.generateKeys();
final RSAPublicKey publicKey = (RSAPublicKey) map.get("public");
final RSAPrivateKey privateKey = (RSAPrivateKey) map.get("private");
final String modulus = publicKey.getModulus().toString();
final String public_exponent = publicKey.getPublicExponent().toString();
final String private_exponent = privateKey.getPrivateExponent().toString();
final RSAPublicKey pubKey = RSAUtils.getPublicKey(modulus, public_exponent);
final RSAPrivateKey priKey = RSAUtils.getPrivateKey(modulus, private_exponent);
final String pubStr = new String(Base64.encodeBase64(pubKey.getEncoded()));
System.err.println("Encoded 1: " + pubStr);
final RSAPublicKey pk2 = RSAUtils.getPublicKey(pubStr);
System.err.println("Encoded 2: " + new String(Base64.encodeBase64(pk2.getEncoded())));
final String priStr = new String(Base64.encodeBase64(priKey.getEncoded()));
System.err.println("Encoded 1: " + priStr);
final RSAPrivateKey pi2 = RSAUtils.getPrivateKey(priStr);
System.err.println("Encoded 2: " + new String(Base64.encodeBase64(pi2.getEncoded())));
System.err.println("modulus: " + modulus);
System.err.println("public_exponent: " + public_exponent);
System.err.println("private_exponent: " + private_exponent);
String ming = "123456789";
for (int i = 0; i < 1; i++) {
ming += "123456789";
}
final String mi = RSAUtils.encryptByPublicKey(ming, pubKey);
System.err.println("mi: " + mi);
ming = RSAUtils.decryptByPrivateKey(mi, priKey);
System.err.println("ming: " + ming);
final DynamicPasswordCipher cipher = new DynamicPasswordCipher();
System.err.println("cipher: " + cipher.decrypt(cipher.encrypt(ming)));
}
/**
* 生成密钥对�?�注意这里是生成密钥对KeyPair，再由密钥对获取公私�?
*
* @return
*/
public static Map<String, byte[]> generateKeyBytes() {
try {
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(KEY_ALGORITHM);
keyPairGenerator.initialize(KEY_SIZE);
KeyPair keyPair = keyPairGenerator.generateKeyPair();
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
Map<String, byte[]> keyMap = new HashMap<String, byte[]>();
keyMap.put(PUBLIC_KEY, publicKey.getEncoded());
keyMap.put(PRIVATE_KEY, privateKey.getEncoded());
return keyMap;
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
