DESKeySpec

open class DESKeySpec : KeySpec

kotlin.Any
↳	javax.crypto.spec.DESKeySpec

This class specifies a DES key.

Summary

Constants
static Int	`DES_KEY_LEN` The constant which defines the length of a DES key in bytes.

Public constructors
`DESKeySpec(key: ByteArray!)` Creates a DESKeySpec object using the first 8 bytes in `key` as the key material for the DES key.
`DESKeySpec(key: ByteArray!, offset: Int)` Creates a DESKeySpec object using the first 8 bytes in `key`, beginning at `offset` inclusive, as the key material for the DES key.

Public methods
open ByteArray!	`getKey()` Returns the DES key material.
open static Boolean	`isParityAdjusted(key: ByteArray!, offset: Int)` Checks if the given DES key material, starting at `offset` inclusive, is parity-adjusted.
open static Boolean	`isWeak(key: ByteArray!, offset: Int)` Checks if the given DES key material is weak or semi-weak.

static val DES_KEY_LEN: Int

The constant which defines the length of a DES key in bytes.

Value: 8

DESKeySpec(key: ByteArray!)

Creates a DESKeySpec object using the first 8 bytes in key as the key material for the DES key.

The bytes that constitute the DES key are those between key[0] and key[7] inclusive.

Parameters
`key`	ByteArray!: the buffer with the DES key material. The first 8 bytes of the buffer are copied to protect against subsequent modification.

Exceptions
`java.lang.NullPointerException`	if the given key material is `null`
`java.security.InvalidKeyException`	if the given key material is shorter than 8 bytes.

DESKeySpec(
    key: ByteArray!, 
    offset: Int)

Creates a DESKeySpec object using the first 8 bytes in key, beginning at offset inclusive, as the key material for the DES key.

The bytes that constitute the DES key are those between key[offset] and key[offset+7] inclusive.

Parameters
`key`	ByteArray!: the buffer with the DES key material. The first 8 bytes of the buffer beginning at `offset` inclusive are copied to protect against subsequent modification.
`offset`	Int: the offset in `key`, where the DES key material starts.

Exceptions
`java.lang.NullPointerException`	if the given key material is `null`
`java.security.InvalidKeyException`	if the given key material, starting at `offset` inclusive, is shorter than 8 bytes.

open fun getKey(): ByteArray!

Returns the DES key material.

Return
`ByteArray!`	the DES key material. Returns a new array each time this method is called.

open static fun isParityAdjusted(
    key: ByteArray!, 
    offset: Int
): Boolean

Checks if the given DES key material, starting at offset inclusive, is parity-adjusted.

Parameters
`key`	ByteArray!: the buffer with the DES key material.
`offset`	Int: the offset in `key`, where the DES key material starts.

Return
`Boolean`	true if the given DES key material is parity-adjusted, false otherwise.

Exceptions
`java.security.InvalidKeyException`	if the given key material is `null`, or starting at `offset` inclusive, is shorter than 8 bytes.

open static fun isWeak(
    key: ByteArray!, 
    offset: Int
): Boolean

Checks if the given DES key material is weak or semi-weak.

Parameters
`key`	ByteArray!: the buffer with the DES key material.
`offset`	Int: the offset in `key`, where the DES key material starts.

Return
`Boolean`	true if the given DES key material is weak or semi-weak, false otherwise.

Exceptions
`java.security.InvalidKeyException`	if the given key material is `null`, or starting at `offset` inclusive, is shorter than 8 bytes.