sha1.js

// http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
var W = new Int32Array(80);
function sha1(s) {
  // 6.1.1 SHA-1 Preprocessing
  var H = new Int32Array([0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0]);
  // 5.1 Padding the Message
  var sLength = s.length, sLength8 = sLength << 3;
  var length = (((sLength8 + 64) | 511) + 1) >> 3;
  var m = new Uint8Array(length);
  for (var i = 0; i < sLength; i++) {
    m[i] = s.charCodeAt(i);
  }
  m[sLength] = 0x80;
  m[length - 4] = (sLength8 >> 24) & 255;
  m[length - 3] = (sLength8 >> 16) & 255;
  m[length - 2] = (sLength8 >> 8) & 255;
  m[length - 1] = sLength8 & 255;
  for (var i = 0; i < length;) {
    // 1. Prepare the message schedule, {Wt}:
    for (var t = 0; t < 16; t++) {
      var M = (m[i] << 24) | (m[i + 1] << 16) | (m[i + 2] << 8) | m[i + 3];
      W[t] = M;
      i += 4;
    }
    for (var t = 16; t < 80; t++) {
      var T = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16];
      W[t] = (T << 1) | (T >>> 31);
    }
    // 2. Initialize the five working variables, a, b, c, d, and e, with the (i-1)^st hash value:
    var a = H[0], b = H[1], c = H[2], d = H[3], e = H[4];
    // 3.
    for (var t = 0; t < 20; t++) {
      var T = (((a << 5) | (a >>> 27)) + ((b & c) ^ (~b & d)) + e + 0x5a827999 + W[t]) | 0;
      e = d;
      d = c;
      c = ((b << 30) | (b >>> 2));
      b = a;
      a = T;
    }
    for (var t = 20; t < 40; t++) {
      var T = (((a << 5) | (a >>> 27)) + (b ^ c ^ d) + e + 0x6ed9eba1 + W[t]) | 0;
      e = d;
      d = c;
      c = ((b << 30) | (b >>> 2));
      b = a;
      a = T;
    }
    for (var t = 40; t < 60; t++) {
      var T = (((a << 5) | (a >>> 27)) + ((b & c) ^ (b & d) ^ (c & d)) + e + 0x8f1bbcdc + W[t]) | 0;
      e = d;
      d = c;
      c = ((b << 30) | (b >>> 2));
      b = a;
      a = T;
    }
    for (var t = 60; t < 80; t++) {
      var T = (((a << 5) | (a >>> 27)) + (b ^ c ^ d) + e + 0xca62c1d6 + W[t]) | 0;
      e = d;
      d = c;
      c = ((b << 30) | (b >>> 2));
      b = a;
      a = T;
    }
    // 4.Compute the i-th intermediate hash value H(i)
    H[0] = (a + H[0]) | 0;
    H[1] = (b + H[1]) | 0;
    H[2] = (c + H[2]) | 0;
    H[3] = (d + H[3]) | 0;
    H[4] = (e + H[4]) | 0;
  }
  return H;
}

function toHexString(h) {
  return Array.prototype.map.call(h, function (i) { return (i >>> 0).toString(16); }).join(' ');
}
// http://www.nsrl.nist.gov/testdata/
if (toHexString(sha1("abc")) !== "a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d") throw "failed 1";
if (toHexString(sha1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq")) !== "84983e44 1c3bd26e baae4aa1 f95129e5 e54670f1") throw "failed 1";

sha256.js

// http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
var W = new Int32Array(64);
function sha256(s) {
  // 6.2.1 SHA-256 Preprocessing
  var H = new Int32Array([0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
                          0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19]);
  // 5.1 Padding the Message
  var sLength = s.length, sLength8 = sLength << 3;
  var length = (((sLength8 + 64) | 511) + 1) >> 3;
  var m = new Uint8Array(length);
  for (var i = 0; i < sLength; i++) {
    m[i] = s.charCodeAt(i);
  }
  m[sLength] = 0x80;
  m[length - 4] = (sLength8 >> 24) & 255;
  m[length - 3] = (sLength8 >> 16) & 255;
  m[length - 2] = (sLength8 >> 8) & 255;
  m[length - 1] = sLength8 & 255;
  for (var i = 0; i < length;) {
    // 1. Prepare the message schedule, {Wt}:
    for (var t = 0; t < 16; t++) {
      var M = (m[i] << 24) | (m[i + 1] << 16) | (m[i + 2] << 8) | m[i + 3];
      W[t] = M;
      i += 4;
    }
    for (var t = 16; t < 64; t++) {
      var x1 = W[t - 2], x0 = W[t - 15];
      var s1 = ((x1 >>> 17) | (x1 << 15)) ^ ((x1 >>> 19) | (x1 << 13)) ^ (x1 >>> 10); 
      var s0 = ((x0 >>> 7) | (x0 << 25)) ^ ((x0 >>> 18) | (x0 << 14)) ^ (x0 >>> 3); 
      W[t] = (s1 + W[t - 7] + s0 + W[t - 16]) | 0;
    }
    // 2. Initialize the eight working variables, a, b, c, d, e, f, g, and h, 
    // with the (i-1)^st hash value:
    var a = H[0], b = H[1], c = H[2], d = H[3], e = H[4], f = H[5], g = H[6], h = H[7];
    // 3.
    for (var t = 0; t < 64; t++) {
      var S1 = ((e >>> 6) | (e << 26)) ^ ((e >>> 11) | (e << 21)) ^ ((e >>> 25) | (e << 7));
      var Ch = (e & f) ^ (~e & g);
      var T1 = (h + S1 + Ch + K[t] + W[t]) | 0;
      var S0 = ((a >>> 2) | (a << 30)) ^ ((a >>> 13) | (a << 19)) ^ ((a >>> 22) | (a << 10));
      var Maj = (a & b) ^ (a & c) ^ (b & c);
      var T2 = (S0 + Maj) | 0;
      h = g;
      g = f;
      f = e;
      e = (d + T1) | 0;
      d = c;
      c = b;
      b = a;
      a = (T1 + T2) | 0;
    }
    // 4.Compute the i-th intermediate hash value H(i)
    H[0] = (a + H[0]) | 0;
    H[1] = (b + H[1]) | 0;
    H[2] = (c + H[2]) | 0;
    H[3] = (d + H[3]) | 0;
    H[4] = (e + H[4]) | 0;
    H[5] = (f + H[5]) | 0;
    H[6] = (g + H[6]) | 0;
    H[7] = (h + H[7]) | 0;
  }
  return H;
}

var K = new Int32Array([
  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 toHexString(h) {
  return Array.prototype.map.call(h, function (i) { return (i >>> 0).toString(16).toUpperCase(); }).join(' ');
}

// http://www.nsrl.nist.gov/testdata/
if (toHexString(sha256("abc")) !== "BA7816BF 8F01CFEA 414140DE 5DAE2223 B00361A3 96177A9C B410FF61 F20015AD") throw "failed 1";
if (toHexString(sha256("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq")) !== "248D6A61 D20638B8 E5C02693 C3E6039 A33CE459 64FF2167 F6ECEDD4 19DB06C1") throw "failed 2";