Package org.hpccsystems.commons.utils

Class CryptoHelper

java.lang.Object

org.hpccsystems.commons.utils.CryptoHelper

public class CryptoHelper
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_AES_SECRETKEY_LEN
static String	DEFAULT_CIPHER_MODE
static DigestAlgorithmType	DEFAULT_DIGEST_ALGORITHM
static String	DEFAULT_SECRETKEY_ALGORITHM

Constructor Summary

Constructors

Constructor	Description
CryptoHelper()

Method Summary

Modifier and Type	Method	Description
static Cipher	createCipher(SecretKeySpec secretKey, String cipherAlgorithm, boolean encryptMode)	Creates the cipher.
static Cipher	createDefaultCipher(String secretKey, boolean encryptMode)	Creates the default cipher.
static Cipher	createDefaultCipher(SecretKeySpec secretKey, boolean encryptMode)	Creates the default cipher.
static SecretKeySpec	createSecretKey(String utf8DigestInput, DigestAlgorithmType digestAlgorithm, String secretKeyAlgorithm)	Creates the secret key.
static SecretKeySpec	createSHA512AESSecretKey(String digestInput)	Creates the SHA 512 AES secret key.
static String	decrypt(String value, String secretKey)	Decrypt.
static String	decrypt(String strToDecrypt, Cipher cipher)	Decrypt.
static String	decrypt(String utf8StrToDecrypt, SecretKeySpec secretspec)	Decrypt.
static String	encrypt(String utf8StrToEncrypt, Cipher cipher)	Encrypt.
static String	encryptSHA512AESPKCS5Pad(String utf8StrToEncrypt, String digestInput)	Encrypt SHA 512 AESPKCS 5 pad.
static String	encryptSHA512AESPKCS5Pad(String utf8StrToEncrypt, SecretKeySpec secretKey)	Encrypt SHA 512 AESPKCS 5 pad.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DIGEST_ALGORITHM

public static final DigestAlgorithmType DEFAULT_DIGEST_ALGORITHM

DEFAULT_SECRETKEY_ALGORITHM

public static final String DEFAULT_SECRETKEY_ALGORITHM

See Also:

Constant Field Values

DEFAULT_AES_SECRETKEY_LEN

public static final int DEFAULT_AES_SECRETKEY_LEN

See Also:

Constant Field Values

DEFAULT_CIPHER_MODE

public static final String DEFAULT_CIPHER_MODE

See Also:

Constant Field Values

Constructor Detail

CryptoHelper

public CryptoHelper()

Method Detail

createSHA512AESSecretKey

public static SecretKeySpec createSHA512AESSecretKey(String digestInput)

Creates the SHA 512 AES secret key.

Parameters:

digestInput - the digest input

Returns:

the secret key spec

createSecretKey

public static SecretKeySpec createSecretKey(String utf8DigestInput,
                                            DigestAlgorithmType digestAlgorithm,
                                            String secretKeyAlgorithm)

Creates the secret key.

Parameters:

utf8DigestInput - the utf 8 digest input

digestAlgorithm - DigestAlgorithmType enumeration MD2 | MD5 | SHA-1 | SHA-256 | SHA-384 | SHA-512

secretKeyAlgorithm - the secret key algorithm

Returns:

the secret key spec

encrypt

public static String encrypt(String utf8StrToEncrypt,
                             Cipher cipher)

Encrypt.

Parameters:

utf8StrToEncrypt - the utf 8 str to encrypt

cipher - the cipher

Returns:

the string

createDefaultCipher

public static Cipher createDefaultCipher(String secretKey,
                                         boolean encryptMode)
                                  throws Exception

Creates the default cipher.

Parameters:

secretKey - the secret key

encryptMode - the encrypt mode

Returns:

the cipher

Throws:

Exception - the exception

createCipher

public static Cipher createCipher(SecretKeySpec secretKey,
                                  String cipherAlgorithm,
                                  boolean encryptMode)
                           throws Exception

Creates the cipher.

Parameters:

secretKey - The key to use for encrypting/decrypting

cipherAlgorithm - AES | AES/CBC/NoPadding | AES/ECB/PKCS5PADDING | etc. There must be an available provder

encryptMode - true=encrypt, false=decrypt

Returns:

the cipher

Throws:

Exception - the exception

createDefaultCipher

public static Cipher createDefaultCipher(SecretKeySpec secretKey,
                                         boolean encryptMode)
                                  throws Exception

Creates the default cipher.

Parameters:

secretKey - the secret key

encryptMode - the encrypt mode

Returns:

the cipher

Throws:

Exception - the exception

encryptSHA512AESPKCS5Pad

public static String encryptSHA512AESPKCS5Pad(String utf8StrToEncrypt,
                                              String digestInput)

Encrypt SHA 512 AESPKCS 5 pad.

Parameters:

utf8StrToEncrypt - the utf 8 str to encrypt

digestInput - the digest input

Returns:

the string

encryptSHA512AESPKCS5Pad

public static String encryptSHA512AESPKCS5Pad(String utf8StrToEncrypt,
                                              SecretKeySpec secretKey)

Encrypt SHA 512 AESPKCS 5 pad.

Parameters:

utf8StrToEncrypt - the utf 8 str to encrypt

secretKey - the secret key

Returns:

the string

decrypt

public static String decrypt(String strToDecrypt,
                             Cipher cipher)

Decrypt.

Parameters:

strToDecrypt - the str to decrypt

cipher - the cipher

Returns:

the string

decrypt

public static String decrypt(String utf8StrToDecrypt,
                             SecretKeySpec secretspec)

Decrypt.

Parameters:

utf8StrToDecrypt - the utf 8 str to decrypt

secretspec - the secretspec

Returns:

the string

decrypt

public static String decrypt(String value,
                             String secretKey)

Decrypt.

Parameters:

value - the value

secretKey - the secret key

Returns:

the string