Package org.seppiko.commons.utils

Class CryptoUtil

java.lang.Object

org.seppiko.commons.utils.CryptoUtil

public class CryptoUtil
extends java.lang.Object

Crypto util https://docs.oracle.com/en/java/javase/11/docs/specs/security/standard-names.html

Author:

Leonard Woo

Constructor Summary

Constructors

Constructor	Description
CryptoUtil()

Method Summary

Modifier and Type	Method	Description
static byte[]	cipher(java.lang.String algorithm, java.lang.String keyAlgorithm, byte[] data, byte[] key, int opmode)	Cipher util
static byte[]	cipher(java.lang.String algorithm, java.lang.String keyAlgorithm, byte[] data, byte[] key, int opmode, java.security.spec.AlgorithmParameterSpec params)	Cipher util
static java.security.KeyPair	keyPairGenerator(java.lang.String algorithm, int keysize)	Asymmetric cryptography key pair generator
static byte[]	mac(byte[] data, byte[] salt, java.lang.String algorithm, java.lang.String keyAlgorithm)	Mac util
static byte[]	md(java.lang.String algorithm, byte[] data)	Message Digest util
static byte[]	secretKeyFactory(java.lang.String algorithm, java.security.spec.KeySpec keySpec)	Secret Key Factory util
static byte[]	signatureSign(java.lang.String algorithm, java.security.PrivateKey privateKey, byte[] rawData)	Data Signature
static boolean	signatureVerify(java.lang.String algorithm, java.security.PublicKey publicKey, byte[] rawData, byte[] signedData)	Data Signature Verification

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CryptoUtil

public CryptoUtil()

Method Details

cipher

public static byte[] cipher(java.lang.String algorithm,
java.lang.String keyAlgorithm,
byte[] data,
byte[] key,
int opmode,
java.security.spec.AlgorithmParameterSpec params)
                     throws javax.crypto.NoSuchPaddingException,
java.security.NoSuchAlgorithmException,
java.security.InvalidAlgorithmParameterException,
java.security.InvalidKeyException,
javax.crypto.IllegalBlockSizeException,
javax.crypto.BadPaddingException

Cipher util

Parameters:

algorithm - Cipher algorithm

keyAlgorithm - Secret key algorithm

data - raw data

key - crypto key

opmode - cipher mode

params - Algorithm Parameter Spec

Returns:

data

Throws:

javax.crypto.NoSuchPaddingException - if transformation contains a padding scheme that is not available.

java.security.NoSuchAlgorithmException - if transformation is null, empty, in an invalid format, or if no Provider supports a CipherSpi implementation for the specified algorithm.

java.security.InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this cipher, or this cipher requires algorithm parameters and params is null, or the given algorithm parameters imply a cryptographic strength that would exceed the legal limits (as determined from the configured jurisdiction policy files).

java.security.InvalidKeyException - if the given key is inappropriate for initializing this cipher, or its keysize exceeds the maximum allowable keysize (as determined from the configured jurisdiction policy files).

javax.crypto.IllegalBlockSizeException - if this cipher is a block cipher, no padding has been requested (only in encryption mode), and the total input length of the data processed by this cipher is not a multiple of block size; or if this encryption algorithm is unable to process the input data provided.

javax.crypto.BadPaddingException - if this cipher is in decryption mode, and (un)padding has been requested, but the decrypted data is not bounded by the appropriate padding bytes.

javax.crypto.AEADBadTagException - – if this cipher is decrypting in an AEAD mode (such as GCM/CCM), and the received authentication tag does not match the calculated value.

See Also:

Cipher

cipher

public static byte[] cipher(java.lang.String algorithm,
java.lang.String keyAlgorithm,
byte[] data,
byte[] key,
int opmode)
                     throws javax.crypto.NoSuchPaddingException,
java.security.NoSuchAlgorithmException,
java.security.InvalidAlgorithmParameterException,
java.security.InvalidKeyException,
javax.crypto.IllegalBlockSizeException,
javax.crypto.BadPaddingException

Cipher util

Parameters:

algorithm - Cipher algorithm

keyAlgorithm - Secret key algorithm

data - raw data

key - crypto key

opmode - cipher mode

Returns:

data

Throws:

javax.crypto.NoSuchPaddingException - if transformation contains a padding scheme that is not available.

java.security.NoSuchAlgorithmException - if transformation is null, empty, in an invalid format, or if no Provider supports a CipherSpi implementation for the specified algorithm.

java.security.InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this cipher, or this cipher requires algorithm parameters and params is null, or the given algorithm parameters imply a cryptographic strength that would exceed the legal limits (as determined from the configured jurisdiction policy files).

java.security.InvalidKeyException - if the given key is inappropriate for initializing this cipher, or its keysize exceeds the maximum allowable keysize (as determined from the configured jurisdiction policy files).

javax.crypto.IllegalBlockSizeException - if this cipher is a block cipher, no padding has been requested (only in encryption mode), and the total input length of the data processed by this cipher is not a multiple of block size; or if this encryption algorithm is unable to process the input data provided.

javax.crypto.BadPaddingException - if this cipher is in decryption mode, and (un)padding has been requested, but the decrypted data is not bounded by the appropriate padding bytes.

javax.crypto.AEADBadTagException - – if this cipher is decrypting in an AEAD mode (such as GCM/CCM), and the received authentication tag does not match the calculated value.

See Also:

Cipher

md

public static byte[] md(java.lang.String algorithm,
byte[] data)
                 throws java.security.NoSuchAlgorithmException

Message Digest util

Parameters:

algorithm - Message Digest Algorithm

data - raw data

Returns:

data hash

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a MessageDigestSpi implementation for the specified algorithm.

See Also:

MessageDigest

mac

public static byte[] mac(byte[] data,
byte[] salt,
java.lang.String algorithm,
java.lang.String keyAlgorithm)
                  throws java.security.NoSuchAlgorithmException,
java.security.InvalidKeyException

Mac util

Parameters:

data - raw data

salt - mac hash salt

algorithm - mac hash algorithm

keyAlgorithm - mac hash key algorithm

Returns:

data hash

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a MacSpi implementation for the specified algorithm.

java.security.InvalidKeyException - if the given key is inappropriate for initializing this MAC.

See Also:

Mac

secretKeyFactory

public static byte[] secretKeyFactory(java.lang.String algorithm,
java.security.spec.KeySpec keySpec)
                               throws java.security.NoSuchAlgorithmException,
java.security.spec.InvalidKeySpecException

Secret Key Factory util

Parameters:

algorithm - Secret Key Factory algorithm

keySpec - KeySpec impl e.g. PBEKeySpec

Returns:

KeySpec data result

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a SecretKeyFactorySpi implementation for the specified algorithm.

java.security.spec.InvalidKeySpecException - if the given key specification is inappropriate for this secret-key factory to produce a secret key.

See Also:

SecretKeyFactory

keyPairGenerator

public static java.security.KeyPair keyPairGenerator(java.lang.String algorithm,
int keysize)
                                              throws java.security.NoSuchAlgorithmException

Asymmetric cryptography key pair generator

Parameters:

algorithm - Asymmetric cryptography key algorithm

keysize - key size

Returns:

key pair

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a KeyPairGeneratorSpi implementation for the specified algorithm.

signatureSign

public static byte[] signatureSign(java.lang.String algorithm,
java.security.PrivateKey privateKey,
byte[] rawData)
                            throws java.security.NoSuchAlgorithmException,
java.security.InvalidKeyException,
java.security.SignatureException

Data Signature

Parameters:

algorithm - signature algorithm

privateKey - signature private key

rawData - data

Returns:

signed data

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a Signature implementation for the specified algorithm

java.security.InvalidKeyException - if the key is invalid

java.security.SignatureException - if this signature object is not initialized properly

signatureVerify

public static boolean signatureVerify(java.lang.String algorithm,
java.security.PublicKey publicKey,
byte[] rawData,
byte[] signedData)
                               throws java.security.NoSuchAlgorithmException,
java.security.InvalidKeyException,
java.security.SignatureException

Data Signature Verification

Parameters:

algorithm - signature algorithm

publicKey - signature private key

rawData - data

signedData - signed data

Returns:

true is verified

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a Signature implementation for the specified algorithm

java.security.InvalidKeyException - if the key is invalid

java.security.SignatureException - if this signature object is not initialized properly