Infendro/hash.kt
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implement optimizations

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Infendro
2026-01-15 22:06:28 +01:00
parent ab036f4f9f
commit d40df04e2e
26 changed files with 463 additions and 855 deletions
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75
src/commonMain/kotlin/com/infendro/hash/blake/Blake-512.kt
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@@ -1,8 +1,10 @@
package com.infendro.hash.blake
import com.infendro.bytearray.toUByteArray
import com.infendro.bytearray.toULongArray
import com.infendro.bytes.bytearray.copyInto
import com.infendro.bytes.longarray.copyInto
import com.infendro.bytes.ulong.copyInto
import com.infendro.hash.HashFunction
import com.infendro.hash.util.ceilPow2
object `Blake-512` : HashFunction {
override val bytes: Int
@@ -16,7 +18,7 @@ object `Blake-512` : HashFunction {
0x3c6ef372fe94f82bUL, 0xa54ff53a5f1d36f1UL,
0x510e527fade682d1UL, 0x9b05688c2b3e6c1fUL,
0x1f83d9abfb41bd6bUL, 0x5be0cd19137e2179UL,
)
).asLongArray()
private val c = ulongArrayOf(
0x243f6a8885a308d3UL, 0x13198a2e03707344UL,
@@ -27,7 +29,7 @@ object `Blake-512` : HashFunction {
0x2ffd72dbd01adfb7UL, 0xb8e1afed6a267e96UL,
0xba7c9045f12c7f99UL, 0x24a19947b3916cf7UL,
0x0801f2e2858efc16UL, 0x636920d871574e69UL,
)
).asLongArray()
private val sigma = arrayOf(
intArrayOf(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15),
@@ -42,47 +44,38 @@ object `Blake-512` : HashFunction {
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
override fun hashInto(value: ByteArray, destination: ByteArray) {
val length = value.size.toULong() * 8UL
val input = pad(value)
val h = initial.copyOf()
val m = LongArray(16)
val v = LongArray(16)
var t = 0UL
val blocks = pad(value)
.chunked(128) { it.toUByteArray() }
for (block in blocks) {
t += minOf(l - t, 1024UL)
compress(h, block, t)
for (i in input.indices step block) {
t += minOf(length - t, 1024UL)
compress(h, input, i, m, v, t)
}
return h.toUByteArray()
h.copyInto(destination)
}
private fun pad(
value: UByteArray,
): UByteArray {
val l = value.size.toULong() * 8UL
return buildList {
addAll(value)
add(0x80U)
while (size % 128 != 111) {
add(0x00U)
}
add(0x01U)
repeat(8) { add(0x00U) }
addAll(l.toUByteArray())
}.toUByteArray()
private fun pad(value: ByteArray): ByteArray {
val length = value.size.toULong() * 8UL
val size = ceilPow2(value.size + 18, block)
val result = ByteArray(size)
value.copyInto(result)
result[value.size] = 0x80U.toByte()
result[result.size - 17] = 0x01
length.copyInto(result, result.size - 8)
return result
}
private fun compress(
h: ULongArray,
block: UByteArray,
t: ULong,
) {
val m = block.toULongArray()
val v = ULongArray(16)
internal fun compress(h: LongArray, value: ByteArray, offset: Int, m: LongArray, v: LongArray, t: ULong) {
value.copyInto(m, startIndex = offset, endIndex = offset + block)
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 + 12] = c[i + 4] xor t.toLong()
for (i in 0..<2) v[i + 14] = c[i + 6]
repeat(16) { r ->
@@ -99,20 +92,12 @@ object `Blake-512` : HashFunction {
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) {
for (i in 0..<8) {
h[i] = h[i] xor v[i] xor v[i + 8]
}
}
private fun g(
v: ULongArray,
a: Int,
b: Int,
c: Int,
d: Int,
x: ULong,
y: ULong,
) {
private fun g(v: LongArray, a: Int, b: Int, c: Int, d: Int, x: Long, y: Long) {
v[a] += v[b] + x
v[d] = (v[d] xor v[a]).rotateRight(32)
v[c] += v[d]