101 lines
4.4 KiB
Kotlin
101 lines
4.4 KiB
Kotlin
package com.infendro.hash.sha2
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import com.infendro.bytes.bytearray.copyInto
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import com.infendro.bytes.longarray.copyInto
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import com.infendro.bytes.ulong.copyInto
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import com.infendro.hash.HashFunction
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import com.infendro.hash.util.align
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object `SHA-512` : HashFunction {
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override val bytes: Int
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get() = 64
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override val block: Int
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get() = 128
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private val initial = ulongArrayOf(
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0x6a09e667f3bcc908UL, 0xbb67ae8584caa73bUL,
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0x3c6ef372fe94f82bUL, 0xa54ff53a5f1d36f1UL,
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0x510e527fade682d1UL, 0x9b05688c2b3e6c1fUL,
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0x1f83d9abfb41bd6bUL, 0x5be0cd19137e2179UL,
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).asLongArray()
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private val c = ulongArrayOf(
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0x428a2f98d728ae22UL, 0x7137449123ef65cdUL, 0xb5c0fbcfec4d3b2fUL, 0xe9b5dba58189dbbcUL,
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0x3956c25bf348b538UL, 0x59f111f1b605d019UL, 0x923f82a4af194f9bUL, 0xab1c5ed5da6d8118UL,
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0xd807aa98a3030242UL, 0x12835b0145706fbeUL, 0x243185be4ee4b28cUL, 0x550c7dc3d5ffb4e2UL,
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0x72be5d74f27b896fUL, 0x80deb1fe3b1696b1UL, 0x9bdc06a725c71235UL, 0xc19bf174cf692694UL,
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0xe49b69c19ef14ad2UL, 0xefbe4786384f25e3UL, 0x0fc19dc68b8cd5b5UL, 0x240ca1cc77ac9c65UL,
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0x2de92c6f592b0275UL, 0x4a7484aa6ea6e483UL, 0x5cb0a9dcbd41fbd4UL, 0x76f988da831153b5UL,
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0x983e5152ee66dfabUL, 0xa831c66d2db43210UL, 0xb00327c898fb213fUL, 0xbf597fc7beef0ee4UL,
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0xc6e00bf33da88fc2UL, 0xd5a79147930aa725UL, 0x06ca6351e003826fUL, 0x142929670a0e6e70UL,
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0x27b70a8546d22ffcUL, 0x2e1b21385c26c926UL, 0x4d2c6dfc5ac42aedUL, 0x53380d139d95b3dfUL,
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0x650a73548baf63deUL, 0x766a0abb3c77b2a8UL, 0x81c2c92e47edaee6UL, 0x92722c851482353bUL,
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0xa2bfe8a14cf10364UL, 0xa81a664bbc423001UL, 0xc24b8b70d0f89791UL, 0xc76c51a30654be30UL,
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0xd192e819d6ef5218UL, 0xd69906245565a910UL, 0xf40e35855771202aUL, 0x106aa07032bbd1b8UL,
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0x19a4c116b8d2d0c8UL, 0x1e376c085141ab53UL, 0x2748774cdf8eeb99UL, 0x34b0bcb5e19b48a8UL,
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0x391c0cb3c5c95a63UL, 0x4ed8aa4ae3418acbUL, 0x5b9cca4f7763e373UL, 0x682e6ff3d6b2b8a3UL,
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0x748f82ee5defb2fcUL, 0x78a5636f43172f60UL, 0x84c87814a1f0ab72UL, 0x8cc702081a6439ecUL,
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0x90befffa23631e28UL, 0xa4506cebde82bde9UL, 0xbef9a3f7b2c67915UL, 0xc67178f2e372532bUL,
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0xca273eceea26619cUL, 0xd186b8c721c0c207UL, 0xeada7dd6cde0eb1eUL, 0xf57d4f7fee6ed178UL,
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0x06f067aa72176fbaUL, 0x0a637dc5a2c898a6UL, 0x113f9804bef90daeUL, 0x1b710b35131c471bUL,
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0x28db77f523047d84UL, 0x32caab7b40c72493UL, 0x3c9ebe0a15c9bebcUL, 0x431d67c49c100d4cUL,
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0x4cc5d4becb3e42b6UL, 0x597f299cfc657e2aUL, 0x5fcb6fab3ad6faecUL, 0x6c44198c4a475817UL,
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).asLongArray()
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override fun hashInto(value: ByteArray, destination: ByteArray, destinationOffset: Int) {
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val input = pad(value)
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val h = initial.copyOf()
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val w = LongArray(80)
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val v = LongArray(8)
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for (i in input.indices step block) {
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process(h, input, i, w, v)
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}
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h.copyInto(destination, destinationOffset)
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}
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internal fun pad(value: ByteArray): ByteArray {
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val length = value.size.toULong() * 8UL
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val size = (value.size + 17).align(block)
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return ByteArray(size).also {
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value.copyInto(it)
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it[value.size] = 0x80U.toByte()
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length.copyInto(it, size - 8)
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}
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}
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internal fun process(h: LongArray, value: ByteArray, offset: Int, w: LongArray, v: LongArray) {
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value.copyInto(w, startIndex = offset, endIndex = offset + block)
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for (i in 16..<80) {
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val s0 = w[i - 15].rotateRight(1) xor w[i - 15].rotateRight(8) xor (w[i - 15] ushr 7)
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val s1 = w[i - 2].rotateRight(19) xor w[i - 2].rotateRight(61) xor (w[i - 2] ushr 6)
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w[i] = (w[i - 16] + s0 + w[i - 7] + s1)
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}
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h.copyInto(v)
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repeat(80) { i ->
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val s0 = v[0].rotateRight(28) xor v[0].rotateRight(34) xor v[0].rotateRight(39)
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val s1 = v[4].rotateRight(14) xor v[4].rotateRight(18) xor v[4].rotateRight(41)
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val ch = (v[4] and v[5]) xor (v[4].inv() and v[6])
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val temp1 = v[7] + s1 + ch + c[i] + w[i]
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val maj = (v[0] and v[1]) xor (v[0] and v[2]) xor (v[1] and v[2])
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val temp2 = s0 + maj
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v[7] = v[6]
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v[6] = v[5]
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v[5] = v[4]
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v[4] = v[3] + temp1
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v[3] = v[2]
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v[2] = v[1]
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v[1] = v[0]
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v[0] = temp1 + temp2
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}
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for (i in 0..<8) {
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h[i] += v[i]
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}
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}
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}
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