Module seppiko.commons.utils

Package org.seppiko.commons.utils

Class CryptoUtil

java.lang.Object

org.seppiko.commons.utils.CryptoUtil

public class CryptoUtil
extends Object

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

Author:

Leonard Woo

Field Summary

Fields

Modifier and Type	Field	Description
static Provider	NONPROVIDER	non provider

Constructor Summary

Constructors

Constructor	Description
CryptoUtil()

Method Summary

Modifier and Type	Method	Description
static byte[]	cipher(String algorithm, String providerName, int opmode, Key key, AlgorithmParameterSpec params, byte[] data)	Cipher util
static byte[]	cipher(String algorithm, Provider provider, int opmode, Key key, AlgorithmParameterSpec params, byte[] data)	Cipher util
static KeyPair	keyPairGenerator(String algorithm, int keysize)	Asymmetric cryptography key pair generator
static byte[]	mac(byte[] data, byte[] salt, String algorithm, String keyAlgorithm)	Mac util
static byte[]	md(String algorithm, byte[] data)	Message Digest util
static byte[]	secretKeyFactory(String algorithm, KeySpec keySpec)	Secret Key Factory util
static byte[]	signatureSign(String algorithm, PrivateKey privateKey, byte[] rawData)	Data Signature Encrypt
static boolean	signatureVerify(String algorithm, 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

Field Details

NONPROVIDER

public static final Provider NONPROVIDER

non provider

Constructor Details

CryptoUtil

public CryptoUtil()

Method Details

cipher

public static byte[] cipher(String algorithm,
 Provider provider,
 int opmode,
 Key key,
 AlgorithmParameterSpec params,
 byte[] data)
                     throws NoSuchPaddingException,
NoSuchAlgorithmException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException

Cipher util

Parameters:

algorithm - cipher algorithm

provider - cipher provider, if you do not need this set null or CryptoUtil.NONPROVIDER see Security.getProvider(providerName)

opmode - cipher mode

key - crypto key

params - Algorithm Parameter Spec, if you do not need this set null

data - raw data

Returns:

data

Throws:

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

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

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).

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).

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.

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.

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(String algorithm,
 String providerName,
 int opmode,
 Key key,
 AlgorithmParameterSpec params,
 byte[] data)
                     throws InvalidAlgorithmParameterException,
NoSuchPaddingException,
IllegalBlockSizeException,
NoSuchAlgorithmException,
BadPaddingException,
InvalidKeyException

Cipher util

Parameters:

algorithm - cipher algorithm

providerName - cipher provider name, if you do not need this set null or ""

opmode - cipher mode

key - crypto key

params - Algorithm Parameter Spec, if you do not need this set null

data - raw data

Returns:

data

Throws:

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

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

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).

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).

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.

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.

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(String algorithm,
 byte[] data)
                 throws NoSuchAlgorithmException

Message Digest util

Parameters:

algorithm - Message Digest Algorithm

data - raw data

Returns:

data hash

Throws:

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

See Also:

MessageDigest

mac

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

Mac util

Parameters:

data - raw data

salt - mac hash salt

algorithm - mac hash algorithm

keyAlgorithm - mac hash key algorithm

Returns:

data hash

Throws:

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

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

See Also:

Mac

secretKeyFactory

public static byte[] secretKeyFactory(String algorithm,
 KeySpec keySpec)
                               throws NoSuchAlgorithmException,
InvalidKeySpecException

Secret Key Factory util

Parameters:

algorithm - Secret Key Factory algorithm

keySpec - KeySpec impl e.g. PBEKeySpec

Returns:

KeySpec data result

Throws:

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

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

See Also:

SecretKeyFactory

keyPairGenerator

public static KeyPair keyPairGenerator(String algorithm,
 int keysize)
                                throws NoSuchAlgorithmException

Asymmetric cryptography key pair generator

Parameters:

algorithm - Asymmetric cryptography key algorithm

keysize - key size

Returns:

key pair

Throws:

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

See Also:

KeyPairGenerator

signatureSign

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

Data Signature Encrypt

Parameters:

algorithm - signature algorithm

privateKey - signature private key

rawData - data

Returns:

signed data

Throws:

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

InvalidKeyException - if the key is invalid

SignatureException - if this signature object is not initialized properly

See Also:

Signature

signatureVerify

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

Data Signature Verification

Parameters:

algorithm - signature algorithm

publicKey - signature private key

rawData - data

signedData - signed data

Returns:

true is verified

Throws:

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

InvalidKeyException - if the key is invalid

SignatureException - if this signature object is not initialized properly

See Also:

Signature