解密工具类,实现了常用的加解密类。包括单向加密:MD5、SHA;对称加密:DES、AES;非对称加密:RSA
完整代码见:https://git.oschina.net/bayern.com/SecureUtils.git 同时提供ant打包脚本。
MD5 单向加密:
/**
* 返回MD5单向加密后的十六进制字符串
* @param data
* @return
* @throws Exception
*/
public String getEncryptForHex(byte[] data) throws Exception {
byte[] digestData = encrypt(data);
StringBuffer hex = new StringBuffer();
for (int i = 0; i < digestData.length; i++) {
int h = ((int) digestData[i]) & 0XFF;
if (h < 16) {
hex.append("0");
}
hex.append(Integer.toHexString(h));
}
return hex.toString();
}DES 对称加密类:
@Override
public byte[] encrypt(byte[] data) throws Exception {
if (secretKey == null || "".equals(secretKey)) {
throw new Exception("scretKey need to exists");
}
SecretKey md5Key = getKey(secretKey);
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, md5Key);
return cipher.doFinal(data);
}
@Override
public byte[] decrypt(byte[] data) throws Exception {
if (secretKey == null || "".equals(secretKey)) {
throw new Exception("scretKey need to exists");
}
SecretKey md5Key = getKey(secretKey);
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, md5Key);
return cipher.doFinal(data);
}RSA 非对称加密。私钥加密 & 私钥解密 & 私钥签名
@Override
public byte[] encrypt(byte[] data) throws Exception {
PrivateKey rsaPrivateKey = getRSAPrivateKey();
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, rsaPrivateKey);
return cipher.doFinal(data);
}
@Override
public byte[] decrypt(byte[] data) throws Exception {
PrivateKey rsaPrivateKey = getRSAPrivateKey();
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, rsaPrivateKey);
return cipher.update(data);
}
/**
* 使用私钥 对数据进行签名
*
* @param data
* @return
* @throws Exception
*/
public String sign(byte[] data) throws Exception {
PrivateKey rsaPrivateKey = getRSAPrivateKey();
Signature signature = Signature.getInstance(SIGN_ALGORITHM);
signature.initSign(rsaPrivateKey);
signature.update(data);
return encoder(signature.sign());
}RSA 非对称加密。公钥加密 & 公钥解密 & 公钥校验签名
@Override
public byte[] encrypt(byte[] data) throws Exception {
if (publicKey == null || "".equals(publicKey)) {
throw new Exception("publicKey is need exists");
}
PublicKey rsaPublicKey = getRSAPublicKey(publicKey);
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, rsaPublicKey);
return cipher.doFinal(data);
}
@Override
public byte[] decrypt(byte[] data) throws Exception {
if (publicKey == null || "".equals(publicKey)) {
throw new Exception("publicKey is need exists");
}
PublicKey rsaPublicKey = getRSAPublicKey(publicKey);
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, rsaPublicKey);
return cipher.doFinal(data);
}
/**
* 使用公钥校验签名
* @param data
* @param sign
* @return
* @throws Exception
*/
public boolean verifySign(byte[] data, String sign) throws Exception {
if (publicKey == null || "".equals(publicKey)) {
throw new Exception("publicKey is need exists");
}
PublicKey rsaPublicKey = getRSAPublicKey(publicKey);
Signature signature = Signature.getInstance(SIGN_ALGORITHM);
signature.initVerify(rsaPublicKey);
signature.update(data);
return signature.verify(decoder(sign));
}未经允许请勿转载:程序喵 » Java加解密工具类(MD5、SHA、DES、AES、RSA)
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