Package cryptography

Class SecuredGCMUsage

java.lang.Object

cryptography.SecuredGCMUsage

public class SecuredGCMUsage
extends java.lang.Object

This class securely performs AES encryption in GCM mode, with 256 bits key size.

Field Summary

Fields

Modifier and Type	Field	Description
static int	AES_KEY_SIZE
static java.lang.String	ALGO_TRANSFORMATION_STRING
static int	IV_SIZE
static int	TAG_BIT_LENGTH

Constructor Summary

Constructors

Constructor	Description
SecuredGCMUsage()

Method Summary

Modifier and Type	Method	Description
static byte[]	aesDecrypt(byte[] encryptedMessage, javax.crypto.SecretKey aesKey, javax.crypto.spec.GCMParameterSpec gcmParamSpec, byte[] aadData)	Attempts to decrypt the encryptedMessage with a symmetric encryption technique
static byte[]	aesEncrypt(java.lang.String message, javax.crypto.SecretKey aesKey, javax.crypto.spec.GCMParameterSpec gcmParamSpec, byte[] aadData)	Attempts to encrypt the message with a symmetric encryption technique

Methods inherited from class java.lang.Object

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

Field Detail

AES_KEY_SIZE

public static int AES_KEY_SIZE

IV_SIZE

public static int IV_SIZE

TAG_BIT_LENGTH

public static int TAG_BIT_LENGTH

ALGO_TRANSFORMATION_STRING

public static java.lang.String ALGO_TRANSFORMATION_STRING

Constructor Detail

SecuredGCMUsage

public SecuredGCMUsage()

Method Detail

aesEncrypt

public static byte[] aesEncrypt(java.lang.String message,
                                javax.crypto.SecretKey aesKey,
                                javax.crypto.spec.GCMParameterSpec gcmParamSpec,
                                byte[] aadData)

Attempts to encrypt the message with a symmetric encryption technique

Parameters:

message - the String of data you wish to encrypt

aesKey - the symmetrical encryption key to be used for the encryption

gcmParamSpec - the GCM parameter specifications used for the encryption

aadData - the extra data tag to be included within the final encryption

Returns:

a byte array of the encrypted message

aesDecrypt

public static byte[] aesDecrypt(byte[] encryptedMessage,
                                javax.crypto.SecretKey aesKey,
                                javax.crypto.spec.GCMParameterSpec gcmParamSpec,
                                byte[] aadData)

Attempts to decrypt the encryptedMessage with a symmetric encryption technique

Parameters:

encryptedMessage - the String of data you wish to encrypt

aesKey - the symmetrical encryption key to be used for the decryption

gcmParamSpec - the GCM parameter specifications used during encryption

aadData - the extra data tag to be included within the encryption

Returns:

a byte array of the decrypted message