com.goldencode.p2j.util

Class CryptoUtils

java.lang.Object

com.goldencode.p2j.util.CryptoUtils

public class CryptoUtils
extends java.lang.Object

Provides helper classes for the 4GL cryptography

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CryptoUtils.CipherEngine The supported symmetric ciphers
static class	CryptoUtils.CipherMode The supported symmetric ciphers' modes
static class	CryptoUtils.CipherParams Symmetric cipher parameters

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Set<java.lang.String>	CIPHERS Supported symmetric ciphers' list as Set Please note that ImmutableSet.of() "preserves order" so the names will be iterated in the order they are specified below
static java.util.Map<java.lang.String,java.util.function.Supplier<org.bouncycastle.crypto.Digest>>	DIGESTS Supported PBE hash algorithms

Constructor Summary

Constructors

Constructor and Description
CryptoUtils()

Method Summary

Modifier and Type	Method and Description
static byte[]	generatePbeKey(byte[] password, byte[] salt, java.lang.String digestName, int rounds) Generates a password-based encryption key, based on the PKCS#5/RFC 2898 standard
static void	main(java.lang.String... args) Test encryption/decryption with supported algorithms
private static boolean	test(java.util.Random rnd, byte[] plainBytes, CryptoUtils.CipherParams cp) Test encryption/decryption for a particular cipher
private static void	testAll(java.lang.String plain) Test encryption/decryption for all supported ciphers

Methods inherited from class java.lang.Object

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

Field Detail

CIPHERS

public static final java.util.Set<java.lang.String> CIPHERS

Supported symmetric ciphers' list as Set Please note that ImmutableSet.of() "preserves order" so the names will be iterated in the order they are specified below

DIGESTS

public static final java.util.Map<java.lang.String,java.util.function.Supplier<org.bouncycastle.crypto.Digest>> DIGESTS

Supported PBE hash algorithms

Constructor Detail

CryptoUtils

public CryptoUtils()

Method Detail

generatePbeKey

public static byte[] generatePbeKey(byte[] password,
                                    byte[] salt,
                                    java.lang.String digestName,
                                    int rounds)
                             throws java.security.NoSuchAlgorithmException

Generates a password-based encryption key, based on the PKCS#5/RFC 2898 standard

Parameters:

password - password

salt - optional salt

digestName - a name of the hash algorithm

rounds - a number of rounds

Returns:

a 16-byte password-based encryption key, based on the PKCS#5/RFC 2898

Throws:

java.security.NoSuchAlgorithmException

main

public static void main(java.lang.String... args)
                 throws java.lang.Exception

Test encryption/decryption with supported algorithms

Parameters:

args - command line args

Throws:

java.lang.Exception

testAll

private static void testAll(java.lang.String plain)
                     throws java.lang.Exception

Test encryption/decryption for all supported ciphers

Parameters:

plain - string to be encrypted

Throws:

java.lang.Exception

test

private static boolean test(java.util.Random rnd,
                            byte[] plainBytes,
                            CryptoUtils.CipherParams cp)
                     throws java.security.NoSuchAlgorithmException,
                            java.security.NoSuchProviderException,
                            javax.crypto.NoSuchPaddingException,
                            java.security.InvalidKeyException,
                            java.security.InvalidAlgorithmParameterException,
                            javax.crypto.IllegalBlockSizeException,
                            javax.crypto.BadPaddingException

Test encryption/decryption for a particular cipher

Parameters:

rnd - Random generator

plainBytes - bytes to be encrypted

cp - cipher parameters

Returns:

true if operation succeeded or false otherwise

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

javax.crypto.NoSuchPaddingException

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

javax.crypto.IllegalBlockSizeException

javax.crypto.BadPaddingException