124 lines
3.7 KiB
Kotlin
124 lines
3.7 KiB
Kotlin
package com.infendro.hash.blake
|
|
|
|
import com.infendro.bytearray.toUByteArray
|
|
import com.infendro.bytearray.toUIntArray
|
|
import com.infendro.hash.HashFunction
|
|
|
|
object `Blake-224` : HashFunction() {
|
|
override val bytes: Int
|
|
get() = 28
|
|
|
|
override val block: Int
|
|
get() = 64
|
|
|
|
private val initial = uintArrayOf(
|
|
0xc1059ed8U, 0x367cd507U,
|
|
0x3070dd17U, 0xf70e5939U,
|
|
0xffc00b31U, 0x68581511U,
|
|
0x64f98fa7U, 0xbefa4fa4U,
|
|
)
|
|
|
|
private val c = uintArrayOf(
|
|
0x243f6a88U, 0x85a308d3U,
|
|
0x13198a2eU, 0x03707344U,
|
|
0xa4093822U, 0x299f31d0U,
|
|
0x082efa98U, 0xec4e6c89U,
|
|
0x452821e6U, 0x38d01377U,
|
|
0xbe5466cfU, 0x34e90c6cU,
|
|
0xc0ac29b7U, 0xc97c50ddU,
|
|
0x3f84d5b5U, 0xb5470917U,
|
|
)
|
|
|
|
private val sigma = arrayOf(
|
|
intArrayOf(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15),
|
|
intArrayOf(14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3),
|
|
intArrayOf(11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4),
|
|
intArrayOf(7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8),
|
|
intArrayOf(9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13),
|
|
intArrayOf(2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9),
|
|
intArrayOf(12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11),
|
|
intArrayOf(13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10),
|
|
intArrayOf(6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5),
|
|
intArrayOf(10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0),
|
|
)
|
|
|
|
override fun hash(value: UByteArray): UByteArray {
|
|
val l = value.size.toULong() * 8UL
|
|
val h = initial.copyOf()
|
|
var t = 0U
|
|
|
|
val blocks = pad(value)
|
|
.chunked(64) { it.toUByteArray() }
|
|
for (block in blocks) {
|
|
t += minOf(l - t, 512UL).toUInt()
|
|
compress(h, block, t)
|
|
}
|
|
|
|
return h.sliceArray(0..6).toUByteArray()
|
|
}
|
|
|
|
private fun pad(
|
|
value: UByteArray,
|
|
): UByteArray {
|
|
val l = value.size.toULong() * 8UL
|
|
return buildList {
|
|
addAll(value)
|
|
add(0x80U)
|
|
while (size % 64 != 56) {
|
|
add(0x00U)
|
|
}
|
|
addAll(l.toUByteArray())
|
|
}.toUByteArray()
|
|
}
|
|
|
|
private fun compress(
|
|
h: UIntArray,
|
|
block: UByteArray,
|
|
t: UInt,
|
|
) {
|
|
val m = block.toUIntArray()
|
|
val v = UIntArray(16)
|
|
for (i in 0..<8) v[i] = h[i]
|
|
for (i in 0..<4) v[i + 8] = c[i]
|
|
for (i in 0..<2) v[i + 12] = c[i + 4] xor t
|
|
for (i in 0..<2) v[i + 14] = c[i + 6]
|
|
|
|
repeat(14) { r ->
|
|
val s = sigma[r % 10]
|
|
|
|
g(v, 0, 4, 8, 12, m[s[0]] xor c[s[1]], m[s[1]] xor c[s[0]])
|
|
g(v, 1, 5, 9, 13, m[s[2]] xor c[s[3]], m[s[3]] xor c[s[2]])
|
|
g(v, 2, 6, 10, 14, m[s[4]] xor c[s[5]], m[s[5]] xor c[s[4]])
|
|
g(v, 3, 7, 11, 15, m[s[6]] xor c[s[7]], m[s[7]] xor c[s[6]])
|
|
|
|
g(v, 0, 5, 10, 15, m[s[8]] xor c[s[9]], m[s[9]] xor c[s[8]])
|
|
g(v, 1, 6, 11, 12, m[s[10]] xor c[s[11]], m[s[11]] xor c[s[10]])
|
|
g(v, 2, 7, 8, 13, m[s[12]] xor c[s[13]], m[s[13]] xor c[s[12]])
|
|
g(v, 3, 4, 9, 14, m[s[14]] xor c[s[15]], m[s[15]] xor c[s[14]])
|
|
}
|
|
|
|
for (i in 0..7) {
|
|
h[i] = h[i] xor v[i] xor v[i + 8]
|
|
}
|
|
}
|
|
|
|
private fun g(
|
|
v: UIntArray,
|
|
a: Int,
|
|
b: Int,
|
|
c: Int,
|
|
d: Int,
|
|
x: UInt,
|
|
y: UInt,
|
|
) {
|
|
v[a] += v[b] + x
|
|
v[d] = (v[d] xor v[a]).rotateRight(16)
|
|
v[c] += v[d]
|
|
v[b] = (v[b] xor v[c]).rotateRight(12)
|
|
v[a] += v[b] + y
|
|
v[d] = (v[d] xor v[a]).rotateRight(8)
|
|
v[c] += v[d]
|
|
v[b] = (v[b] xor v[c]).rotateRight(7)
|
|
}
|
|
}
|