Main step of GOST 28147-89: Difference between revisions
Added Kotlin
(Updated D entry) |
(Added Kotlin) |
||
Line 364:
<pre>
[1f][88][cf][07][21][04][3b][04]
</pre>
=={{header|Kotlin}}==
{{trans|Go}}
<lang scala>// version 1.1.4-3
fun Byte.toUInt() = java.lang.Byte.toUnsignedInt(this)
fun Byte.toULong() = java.lang.Byte.toUnsignedLong(this)
fun Int.toULong() = java.lang.Integer.toUnsignedLong(this)
val s = arrayOf(
byteArrayOf( 4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3),
byteArrayOf(14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9),
byteArrayOf( 5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11),
byteArrayOf( 7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3),
byteArrayOf( 6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2),
byteArrayOf( 4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14),
byteArrayOf(13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12),
byteArrayOf( 1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12)
)
class Gost(val sBox: Array<ByteArray>) {
val k87 = ByteArray(256)
val k65 = ByteArray(256)
val k43 = ByteArray(256)
val k21 = ByteArray(256)
val enc = ByteArray(8)
init {
for (i in 0 until 256) {
val j = i ushr 4
val k = i and 15
k87[i] = ((sBox[7][j].toUInt() shl 4) or sBox[6][k].toUInt()).toByte()
k65[i] = ((sBox[5][j].toUInt() shl 4) or sBox[4][k].toUInt()).toByte()
k43[i] = ((sBox[3][j].toUInt() shl 4) or sBox[2][k].toUInt()).toByte()
k21[i] = ((sBox[1][j].toUInt() shl 4) or sBox[0][k].toUInt()).toByte()
}
}
fun f(x: Int): Int {
val y = (k87[(x ushr 24) and 255].toULong() shl 24) or
(k65[(x ushr 16) and 255].toULong() shl 16) or
(k43[(x ushr 8) and 255].toULong() shl 8) or
(k21[ x and 255].toULong())
return ((y shl 11) or (y ushr 21)).toInt()
}
fun u32(ba: ByteArray): Int =
(ba[0].toULong() or
(ba[1].toULong() shl 8) or
(ba[2].toULong() shl 16) or
(ba[3].toULong() shl 24)).toInt()
fun b4(u: Int) {
enc[0] = u.toByte()
enc[1] = (u ushr 8).toByte()
enc[2] = (u ushr 16).toByte()
enc[3] = (u ushr 24).toByte()
}
fun mainStep(input: ByteArray, key: ByteArray) {
val key32 = u32(key)
val input1 = u32(input.sliceArray(0..3))
val input2 = u32(input.sliceArray(4..7))
val temp = (key32.toULong() + input1.toULong()).toInt()
b4(f(temp) xor input2)
for (i in 0..3) enc[4 + i] = input[i]
}
}
fun main(args: Array<String>) {
val input = byteArrayOf(0x21, 0x04, 0x3B, 0x04, 0x30, 0x04, 0x32, 0x04)
val key = byteArrayOf(0xF9.toByte(), 0x04, 0xC1.toByte(), 0xE2.toByte())
val g = Gost(s)
g.mainStep(input, key)
for (b in g.enc) print("[%02X]".format(b))
println()
}</lang>
{{out}}
<pre>
[1F][88][CF][07][21][04][3B][04]
</pre>
| |||