Module seppiko.commons.utils

Package org.seppiko.commons.utils.crypto

Class SignatureUtil

java.lang.Object

org.seppiko.commons.utils.crypto.SignatureUtil

public class SignatureUtil
extends Object

Signature Util

Author:

Leonard Woo

See Also:

• Java Security Standard Algorithm Names

Constructor Summary

Constructors

Constructor	Description
SignatureUtil()

Method Summary

Modifier and Type	Method	Description
static Signature	signature(String algorithm)	Returns a Signature object that implements the specified signature algorithm.
static Signature	signature(String algorithm, Provider provider)	Returns a Signature object that implements the specified signature algorithm.
static byte[]	signatureSign(String algorithm, PrivateKey privateKey, byte[] rawData)	Data Signature Encrypt
static byte[]	signatureSign(String algorithm, Provider provider, PrivateKey privateKey, byte[] rawData)	Data Signature Encrypt
static boolean	signatureVerify(String algorithm, Provider provider, PublicKey publicKey, byte[] rawData, byte[] signedData)	Data Signature Verification
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

Constructor Details

SignatureUtil

public SignatureUtil()

Method Details

signature

public static Signature signature(String algorithm)
                           throws NoSuchAlgorithmException,
NullPointerException

Returns a Signature object that implements the specified signature algorithm.

Parameters:

algorithm - the standard name of the algorithm requested

Returns:

the new Signature object

Throws:

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

NullPointerException - if algorithm is null.

signature

public static Signature signature(String algorithm,
 Provider provider)
                           throws NoSuchAlgorithmException,
NullPointerException,
IllegalArgumentException

Returns a Signature object that implements the specified signature algorithm.

Parameters:

algorithm - the standard name of the algorithm requested

provider - the provider

Returns:

the new Signature object

Throws:

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

NullPointerException - if algorithm is null.

IllegalArgumentException - if the provider is null.

signatureSign

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

NullPointerException - if algorithm is null.

See Also:

• Signature

signatureVerify

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

NullPointerException - if algorithm is null.

See Also:

• Signature

signatureSign

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

Data Signature Encrypt

Parameters:

algorithm - signature algorithm

provider - the provider

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.

NullPointerException - if algorithm is null.

IllegalArgumentException

See Also:

• Signature

signatureVerify

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

Data Signature Verification

Parameters:

algorithm - signature algorithm

provider - the provider

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.

NullPointerException - if algorithm is null.

IllegalArgumentException - if the provider is null.

See Also:

• Signature