加密常用加解密工具类（md5、sha、des、aes、rsa）

常用加解密工具类MD5、 S HA、 DES、 AES、 RS A

加解密工具类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 RS A

完整代码见 https://git.os china.net/bayern.c om/S ecureUtils.git同时提供ant打包脚本。

Cipher cipher=Cipher.getInstanc e(ALGORIT HM);cipher.init(Cipher.ENCRYPT_MODE,md5Key);return c ipher.doFinal(data);

@Overridepublic byte[]decrypt(byte[]data) throws Exc eptionif(s ecretKey==null | | .equals(s ecretKey))throw new Exc eption( scretKey need to exists

SecretKey md5Key=getKey(secretKey);

Cipher cipher=Cipher.getInstanc e(ALGORIT HM);cipher.init(Cipher.DECRYPT_MODE,md5Key);return c ipher.doFinal(data);

PrivateKey rsaPrivateKey=getRS APrivateKey();

Cipher cipher=Cipher.getInstanc e(ALGORIT HM);cipher.init(Cipher.ENCRYPT_MODE, rsaPrivateKey);return c ipher.doFinal(data);

@Overridepublic byte[]decrypt(byte[]data) throws Exc eption

PrivateKey rsaPrivateKey=getRS APrivateKey();

Cipher cipher=Cipher.getInstanc e(ALGORIT HM);cipher.init(Cipher.DECRYPT_MODE, rsaPrivateKey);return c ipher.update(data);

*使用私钥对数据进行签名

*@param data

*@r eturn

*@throw s Exc eptionpublic String sign(byte[]data) throws Exc eption

PrivateKey rsaPrivateKey=getRS APrivateKey();

Signature signature=Signature.getInstanc e(SIGN_ALGORIT HM);s ignature.initS ign(rs aPrivateKey);s ignature.update(data);return enc oder(s ignature.s ign());

RSA非对称加密。公钥加密公钥解密公钥校验签名

@Overridepublic byte[] encrypt(byte[]data) throws Exc eptionif(public Key==null | | .equals(public Key))throw new Exc eption(publicKey is need exists

PublicKey rsaPublicKey=getRSAPublic Key(public Key);

Cipher cipher=Cipher.getInstanc e(ALGORIT HM);cipher.init(Cipher.ENCRYPT_MODE, rsaPublicKey);return c ipher.doFinal(data);

@Overridepublic byte[]decrypt(byte[]data) throws Exc eptionif(public Key==null | | .equals(public Key))throw new Exc eption(publicKey is need exists

PublicKey rsaPublicKey=getRSAPublic Key(public Key);

Cipher cipher=Cipher.getInstanc e(ALGORIT HM);cipher.init(Cipher.DECRYPT_MODE, rsaPublicKey);return c ipher.doFinal(data);

*使用公钥校验签名

*@param data

*@param sign

*@r eturn

*@throw s Exc eptionpublic boolean verifySign(byte[]data,String sign) throws Exceptionif(public Key==null | | .equals(public Key))throw new Exc eption(publicKey is need exists

PublicKey rsaPublicKey=getRSAPublic Key(public Key);

Signature signature=Signature.getInstanc e(SIGN_ALGORIT HM);s ignature.initVerify(rs aPublic Key);s ignature.update(data);return s ignature.verify(dec oder(s ign));

}