- class SHA256 {
- constructor(data) {
- this.K256 = new Array(
- 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
- );
- this.sha256_hex_digits = "0123456789abcdef";
- this.ihash = [0x6a09e667,
- 0xbb67ae85,
- 0x3c6ef372,
- 0xa54ff53a,
- 0x510e527f,
- 0x9b05688c,
- 0x1f83d9ab,
- 0x5be0cd19];
- this.count = [0, 0];
- this.buffer = new Array(64);
- this.sha256_update(data, data.length);
- this.sha256_final();
- }
- rotateRight(n, x) {
- return ((x >>> n) | (x << (32 - n)));
- }
- choice(x, y, z) {
- return ((x & y) ^ (~x & z));
- }
- majority(x, y, z) {
- return ((x & y) ^ (x & z) ^ (y & z));
- }
- sha256_Sigma0(x) {
- return (this.rotateRight(2, x) ^ this.rotateRight(13, x) ^ this.rotateRight(22, x));
- }
- sha256_Sigma1(x) {
- return (this.rotateRight(6, x) ^ this.rotateRight(11, x) ^ this.rotateRight(25, x));
- }
- sha256_sigma0(x) {
- return (this.rotateRight(7, x) ^ this.rotateRight(18, x) ^ (x >>> 3));
- }
- sha256_sigma1(x) {
- return (this.rotateRight(17, x) ^ this.rotateRight(19, x) ^ (x >>> 10));
- }
- sha256_expand(W, j) {
- return (W[j & 0x0f] += this.sha256_sigma1(W[(j + 14) & 0x0f]) + W[(j + 9) & 0x0f] +
- this.sha256_sigma0(W[(j + 1) & 0x0f]));
- }
- safe_add(x, y) {
- let lsw = (x & 0xffff) + (y & 0xffff);
- let msw = (x >> 16) + (y >> 16) + (lsw >> 16);
- return (msw << 16) | (lsw & 0xffff);
- }
- sha256_transform() {
- let a, b, c, d, e, f, g, h, T1, T2;
- let W = new Array(16);
- a = this.ihash[0];
- b = this.ihash[1];
- c = this.ihash[2];
- d = this.ihash[3];
- e = this.ihash[4];
- f = this.ihash[5];
- g = this.ihash[6];
- h = this.ihash[7];
- for (let i = 0; i < 16; i++)
- W[i] = ((this.buffer[(i << 2) + 3]) | (this.buffer[(i << 2) + 2] << 8) | (this.buffer[(i << 2) + 1]
- << 16) | (this.buffer[i << 2] << 24));
- for (let j = 0; j < 64; j++) {
- T1 = h + this.sha256_Sigma1(e) + this.choice(e, f, g) + this.K256[j];
- if (j < 16) T1 += W[j];
- else T1 += this.sha256_expand(W, j);
- T2 = this.sha256_Sigma0(a) + this.majority(a, b, c);
- h = g;
- g = f;
- f = e;
- e = this.safe_add(d, T1);
- d = c;
- c = b;
- b = a;
- a = this.safe_add(T1, T2);
- }
- this.ihash[0] += a;
- this.ihash[1] += b;
- this.ihash[2] += c;
- this.ihash[3] += d;
- this.ihash[4] += e;
- this.ihash[5] += f;
- this.ihash[6] += g;
- this.ihash[7] += h;
- }
- sha256_update(data, inputLen) {
- let i, index, curpos = 0;
- index = ((this.count[0] >> 3) & 0x3f);
- let remainder = (inputLen & 0x3f);
- if ((this.count[0] += (inputLen << 3)) < (inputLen << 3)) this.count[1]++;
- this.count[1] += (inputLen >> 29);
- for (i = 0; i + 63 < inputLen; i += 64) {
- for (let j = index; j < 64; j++)
- this.buffer[j] = data.charCodeAt(curpos++);
- this.sha256_transform();
- index = 0;
- }
- for (let j = 0; j < remainder; j++) {
- this.buffer[j] = data.charCodeAt(curpos++);
- }
- }
- sha256_final() {
- let index = ((this.count[0] >> 3) & 0x3f);
- this.buffer[index++] = 0x80;
- if (index <= 56) {
- for (let i = index; i < 56; i++)
- this.buffer[i] = 0;
- } else {
- for (let i = index; i < 64; i++)
- this.buffer[i] = 0;
- this.sha256_transform();
- for (let i = 0; i < 56; i++)
- this.buffer[i] = 0;
- }
- this.buffer[56] = (this.count[1] >>> 24) & 0xff;
- this.buffer[57] = (this.count[1] >>> 16) & 0xff;
- this.buffer[58] = (this.count[1] >>> 8) & 0xff;
- this.buffer[59] = this.count[1] & 0xff;
- this.buffer[60] = (this.count[0] >>> 24) & 0xff;
- this.buffer[61] = (this.count[0] >>> 16) & 0xff;
- this.buffer[62] = (this.count[0] >>> 8) & 0xff;
- this.buffer[63] = this.count[0] & 0xff;
- this.sha256_transform();
- }
- sha256_encode_bytes() {
- let j = 0;
- let output = new Array(32);
- for (let i = 0; i < 8; i++) {
- output[j++] = ((this.ihash[i] >>> 24) & 0xff);
- output[j++] = ((this.ihash[i] >>> 16) & 0xff);
- output[j++] = ((this.ihash[i] >>> 8) & 0xff);
- output[j++] = (this.ihash[i] & 0xff);
- }
- return output;
- }
- toHex() {
- let output = new String();
- for (let i = 0; i < 8; i++) {
- for (let j = 28; j >= 0; j -= 4)
- output += this.sha256_hex_digits.charAt((this.ihash[i] >>> j) & 0x0f);
- }
- return output;
- }
- }
- var str = Forguncy.Page.getCell("str").getValue();
- var outvar = new SHA256(str).toHex();
- Forguncy.Page.getCell("out").setValue(outvar)
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