const SHA256_K = Object.freeze([
    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
    0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
    0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
    0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
    0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
    0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
    0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
    0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
    0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
    0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
    0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
    0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
    0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
]);
function rotr(value, bits) {
    return (value >>> bits) | (value << (32 - bits));
}
function toHex(value) {
    return (value >>> 0).toString(16).padStart(8, '0');
}
export function sha256Hex(input) {
    const source = new TextEncoder().encode(input);
    const bitLength = source.length * 8;
    const withOne = source.length + 1;
    const blockRemainder = withOne % 64;
    const zeroPaddingLength = blockRemainder <= 56
        ? 56 - blockRemainder
        : 120 - blockRemainder;
    const totalLength = source.length + 1 + zeroPaddingLength + 8;
    const message = new Uint8Array(totalLength);
    message.set(source, 0);
    message[source.length] = 0x80;
    const bitLengthHigh = Math.floor(bitLength / 0x100000000);
    const bitLengthLow = bitLength >>> 0;
    message[totalLength - 8] = (bitLengthHigh >>> 24) & 0xff;
    message[totalLength - 7] = (bitLengthHigh >>> 16) & 0xff;
    message[totalLength - 6] = (bitLengthHigh >>> 8) & 0xff;
    message[totalLength - 5] = bitLengthHigh & 0xff;
    message[totalLength - 4] = (bitLengthLow >>> 24) & 0xff;
    message[totalLength - 3] = (bitLengthLow >>> 16) & 0xff;
    message[totalLength - 2] = (bitLengthLow >>> 8) & 0xff;
    message[totalLength - 1] = bitLengthLow & 0xff;
    let h0 = 0x6a09e667;
    let h1 = 0xbb67ae85;
    let h2 = 0x3c6ef372;
    let h3 = 0xa54ff53a;
    let h4 = 0x510e527f;
    let h5 = 0x9b05688c;
    let h6 = 0x1f83d9ab;
    let h7 = 0x5be0cd19;
    const w = new Uint32Array(64);
    for (let offset = 0; offset < message.length; offset += 64) {
        for (let i = 0; i < 16; i += 1) {
            const base = offset + (i * 4);
            w[i] = ((message[base] << 24)
                | (message[base + 1] << 16)
                | (message[base + 2] << 8)
                | message[base + 3]) >>> 0;
        }
        for (let i = 16; i < 64; i += 1) {
            const s0 = rotr(w[i - 15], 7) ^ rotr(w[i - 15], 18) ^ (w[i - 15] >>> 3);
            const s1 = rotr(w[i - 2], 17) ^ rotr(w[i - 2], 19) ^ (w[i - 2] >>> 10);
            w[i] = (w[i - 16] + s0 + w[i - 7] + s1) >>> 0;
        }
        let a = h0;
        let b = h1;
        let c = h2;
        let d = h3;
        let e = h4;
        let f = h5;
        let g = h6;
        let h = h7;
        for (let i = 0; i < 64; i += 1) {
            const sum1 = rotr(e, 6) ^ rotr(e, 11) ^ rotr(e, 25);
            const ch = (e & f) ^ ((~e) & g);
            const temp1 = (h + sum1 + ch + SHA256_K[i] + w[i]) >>> 0;
            const sum0 = rotr(a, 2) ^ rotr(a, 13) ^ rotr(a, 22);
            const maj = (a & b) ^ (a & c) ^ (b & c);
            const temp2 = (sum0 + maj) >>> 0;
            h = g;
            g = f;
            f = e;
            e = (d + temp1) >>> 0;
            d = c;
            c = b;
            b = a;
            a = (temp1 + temp2) >>> 0;
        }
        h0 = (h0 + a) >>> 0;
        h1 = (h1 + b) >>> 0;
        h2 = (h2 + c) >>> 0;
        h3 = (h3 + d) >>> 0;
        h4 = (h4 + e) >>> 0;
        h5 = (h5 + f) >>> 0;
        h6 = (h6 + g) >>> 0;
        h7 = (h7 + h) >>> 0;
    }
    return [
        toHex(h0),
        toHex(h1),
        toHex(h2),
        toHex(h3),
        toHex(h4),
        toHex(h5),
        toHex(h6),
        toHex(h7),
    ].join('');
}
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