org.bouncycastle.crypto.params

Class DESParameters

public class DESParameters extends KeyParameter

Field Summary
static intDES_KEY_LENGTH
Constructor Summary
DESParameters(byte[] key)
Method Summary
static booleanisWeakKey(byte[] key, int offset)
DES has 16 weak keys.
static voidsetOddParity(byte[] bytes)
DES Keys use the LSB as the odd parity bit.

Field Detail

DES_KEY_LENGTH

public static final int DES_KEY_LENGTH

Constructor Detail

DESParameters

public DESParameters(byte[] key)

Method Detail

isWeakKey

public static boolean isWeakKey(byte[] key, int offset)
DES has 16 weak keys. This method will check if the given DES key material is weak or semi-weak. Key material that is too short is regarded as weak.

See "Applied Cryptography" by Bruce Schneier for more information.

Returns: true if the given DES key material is weak or semi-weak, false otherwise.

setOddParity

public static void setOddParity(byte[] bytes)
DES Keys use the LSB as the odd parity bit. This can be used to check for corrupt keys.

Parameters: bytes the byte array to set the parity on.