mirror of
https://github.com/stablyai/orca.git
synced 2026-10-08 00:02:38 +00:00
88 lines
3.2 KiB
TypeScript
88 lines
3.2 KiB
TypeScript
const K = new Uint32Array([
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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])
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function rotateRight(value: number, bits: number): number {
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return (value >>> bits) | (value << (32 - bits))
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}
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export function sha256(message: Uint8Array): Uint8Array {
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const hash = new Uint32Array([
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
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])
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const bitLength = message.length * 8
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const paddedLength = ((message.length + 8) >> 6) * 64 + 64
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const bytes = new Uint8Array(paddedLength)
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bytes.set(message)
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bytes[message.length] = 0x80
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const view = new DataView(bytes.buffer)
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view.setUint32(paddedLength - 4, bitLength >>> 0, false)
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view.setUint32(paddedLength - 8, Math.floor(bitLength / 0x100000000), false)
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const words = new Uint32Array(64)
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for (let offset = 0; offset < paddedLength; offset += 64) {
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for (let index = 0; index < 16; index += 1) {
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words[index] = view.getUint32(offset + index * 4, false)
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}
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for (let index = 16; index < 64; index += 1) {
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const s0 =
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rotateRight(words[index - 15], 7) ^
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rotateRight(words[index - 15], 18) ^
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(words[index - 15] >>> 3)
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const s1 =
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rotateRight(words[index - 2], 17) ^
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rotateRight(words[index - 2], 19) ^
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(words[index - 2] >>> 10)
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words[index] = (words[index - 16] + s0 + words[index - 7] + s1) | 0
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}
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let a = hash[0]
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let b = hash[1]
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let c = hash[2]
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let d = hash[3]
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let e = hash[4]
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let f = hash[5]
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let g = hash[6]
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let h = hash[7]
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for (let index = 0; index < 64; index += 1) {
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const sigma1 = rotateRight(e, 6) ^ rotateRight(e, 11) ^ rotateRight(e, 25)
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const choice = (e & f) ^ (~e & g)
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const first = (h + sigma1 + choice + K[index] + words[index]) | 0
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const sigma0 = rotateRight(a, 2) ^ rotateRight(a, 13) ^ rotateRight(a, 22)
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const majority = (a & b) ^ (a & c) ^ (b & c)
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const second = (sigma0 + majority) | 0
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h = g
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g = f
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f = e
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e = (d + first) | 0
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d = c
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c = b
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b = a
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a = (first + second) | 0
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}
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hash[0] = (hash[0] + a) | 0
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hash[1] = (hash[1] + b) | 0
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hash[2] = (hash[2] + c) | 0
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hash[3] = (hash[3] + d) | 0
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hash[4] = (hash[4] + e) | 0
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hash[5] = (hash[5] + f) | 0
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hash[6] = (hash[6] + g) | 0
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hash[7] = (hash[7] + h) | 0
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}
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const digest = new Uint8Array(32)
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const digestView = new DataView(digest.buffer)
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for (let index = 0; index < 8; index += 1) {
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digestView.setUint32(index * 4, hash[index], false)
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}
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return digest
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}
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