Function _sha1

packages/service-worker/cli/sha1.ts:31–57

(words32: number[], len: number)

}

function _sha1(words32: number[], len: number): string {
  const w: number[] = [];
  let [a, b, c, d, e]: number[] = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];

  words32[len >> 5] |= 0x80 << (24 - (len % 32));
  words32[(((len + 64) >> 9) << 4) + 15] = len;

  for (let i = 0; i < words32.length; i += 16) {
    const [h0, h1, h2, h3, h4]: number[] = [a, b, c, d, e];

    for (let j = 0; j < 80; j++) {
      if (j < 16) {
        w[j] = words32[i + j];
      } else {
        w[j] = rol32(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
      }

      const [f, k] = fk(j, b, c, d);
      const temp = [rol32(a, 5), f, e, k, w[j]].reduce(add32);
      [e, d, c, b, a] = [d, c, rol32(b, 30), a, temp];
    }

    [a, b, c, d, e] = [add32(a, h0), add32(b, h1), add32(c, h2), add32(d, h3), add32(e, h4)];
  }

  return byteStringToHexString(words32ToByteString([a, b, c, d, e]));
}

function add32(a: number, b: number): number {
  return add32to64(a, b)[1];