198 lines
5.2 KiB
JavaScript
198 lines
5.2 KiB
JavaScript
const H = [
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1779033703,
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-1150833019,
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1013904242,
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-1521486534,
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1359893119,
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-1694144372,
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528734635,
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1541459225
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];
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const K = [
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1116352408,
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1899447441,
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-1245643825,
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-373957723,
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961987163,
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1508970993,
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-1841331548,
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-1424204075,
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-670586216,
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310598401,
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607225278,
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1426881987,
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1925078388,
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-2132889090,
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-1680079193,
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-1046744716,
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-459576895,
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-272742522,
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264347078,
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604807628,
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770255983,
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1249150122,
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1555081692,
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1996064986,
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-1740746414,
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-1473132947,
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-1341970488,
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-1084653625,
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-958395405,
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-710438585,
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113926993,
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338241895,
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666307205,
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773529912,
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1294757372,
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1396182291,
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1695183700,
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1986661051,
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-2117940946,
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-1838011259,
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-1564481375,
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-1474664885,
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-1035236496,
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-949202525,
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-778901479,
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-694614492,
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-200395387,
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275423344,
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430227734,
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506948616,
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659060556,
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883997877,
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958139571,
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1322822218,
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1537002063,
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1747873779,
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1955562222,
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2024104815,
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-2067236844,
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-1933114872,
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-1866530822,
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-1538233109,
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-1090935817,
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-965641998
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];
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const base64KeyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
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const W = [];
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var SHA256 = class {
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_data = new WordArray();
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_hash = new WordArray([...H]);
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_nDataBytes = 0;
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_minBufferSize = 0;
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finalize(messageUpdate) {
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if (messageUpdate) this._append(messageUpdate);
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const nBitsTotal = this._nDataBytes * 8;
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const nBitsLeft = this._data.sigBytes * 8;
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this._data.words[nBitsLeft >>> 5] |= 128 << 24 - nBitsLeft % 32;
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this._data.words[(nBitsLeft + 64 >>> 9 << 4) + 14] = Math.floor(nBitsTotal / 4294967296);
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this._data.words[(nBitsLeft + 64 >>> 9 << 4) + 15] = nBitsTotal;
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this._data.sigBytes = this._data.words.length * 4;
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this._process();
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return this._hash;
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}
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_doProcessBlock(M, offset) {
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const H = this._hash.words;
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let a = H[0];
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let b = H[1];
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let c = H[2];
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let d = H[3];
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let e = H[4];
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let f = H[5];
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let g = H[6];
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let h = H[7];
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for (let i = 0; i < 64; i++) {
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if (i < 16) W[i] = M[offset + i] | 0;
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else {
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const gamma0x = W[i - 15];
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const gamma0 = (gamma0x << 25 | gamma0x >>> 7) ^ (gamma0x << 14 | gamma0x >>> 18) ^ gamma0x >>> 3;
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const gamma1x = W[i - 2];
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const gamma1 = (gamma1x << 15 | gamma1x >>> 17) ^ (gamma1x << 13 | gamma1x >>> 19) ^ gamma1x >>> 10;
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W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16];
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}
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const ch = e & f ^ ~e & g;
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const maj = a & b ^ a & c ^ b & c;
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const sigma0 = (a << 30 | a >>> 2) ^ (a << 19 | a >>> 13) ^ (a << 10 | a >>> 22);
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const sigma1 = (e << 26 | e >>> 6) ^ (e << 21 | e >>> 11) ^ (e << 7 | e >>> 25);
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const t1 = h + sigma1 + ch + K[i] + W[i];
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const t2 = sigma0 + maj;
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h = g;
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g = f;
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f = e;
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e = d + t1 | 0;
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d = c;
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c = b;
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b = a;
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a = t1 + t2 | 0;
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}
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H[0] = H[0] + a | 0;
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H[1] = H[1] + b | 0;
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H[2] = H[2] + c | 0;
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H[3] = H[3] + d | 0;
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H[4] = H[4] + e | 0;
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H[5] = H[5] + f | 0;
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H[6] = H[6] + g | 0;
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H[7] = H[7] + h | 0;
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}
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_append(data) {
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if (typeof data === "string") data = WordArray.fromUtf8(data);
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this._data.concat(data);
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this._nDataBytes += data.sigBytes;
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}
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_process(doFlush) {
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let processedWords;
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let nBlocksReady = this._data.sigBytes / 64;
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if (doFlush) nBlocksReady = Math.ceil(nBlocksReady);
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else nBlocksReady = Math.max((nBlocksReady | 0) - this._minBufferSize, 0);
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const nWordsReady = nBlocksReady * 16;
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const nBytesReady = Math.min(nWordsReady * 4, this._data.sigBytes);
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if (nWordsReady) {
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for (let offset = 0; offset < nWordsReady; offset += 16) this._doProcessBlock(this._data.words, offset);
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processedWords = this._data.words.splice(0, nWordsReady);
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this._data.sigBytes -= nBytesReady;
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}
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return new WordArray(processedWords, nBytesReady);
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}
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};
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var WordArray = class WordArray {
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words;
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sigBytes;
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constructor(words, sigBytes) {
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words = this.words = words || [];
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this.sigBytes = sigBytes === void 0 ? words.length * 4 : sigBytes;
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}
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static fromUtf8(input) {
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const str = unescape(encodeURIComponent(input));
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const strlen = str.length;
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const words = [];
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for (let i = 0; i < strlen; i++) words[i >>> 2] |= (str.charCodeAt(i) & 255) << 24 - i % 4 * 8;
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return new WordArray(words, strlen);
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}
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toBase64() {
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const base64Chars = [];
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for (let i = 0; i < this.sigBytes; i += 3) {
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const byte1 = this.words[i >>> 2] >>> 24 - i % 4 * 8 & 255;
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const byte2 = this.words[i + 1 >>> 2] >>> 24 - (i + 1) % 4 * 8 & 255;
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const byte3 = this.words[i + 2 >>> 2] >>> 24 - (i + 2) % 4 * 8 & 255;
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const triplet = byte1 << 16 | byte2 << 8 | byte3;
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for (let j = 0; j < 4 && i * 8 + j * 6 < this.sigBytes * 8; j++) base64Chars.push(base64KeyStr.charAt(triplet >>> 6 * (3 - j) & 63));
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}
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return base64Chars.join("");
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}
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concat(wordArray) {
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this.words[this.sigBytes >>> 2] &= 4294967295 << 32 - this.sigBytes % 4 * 8;
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this.words.length = Math.ceil(this.sigBytes / 4);
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if (this.sigBytes % 4) for (let i = 0; i < wordArray.sigBytes; i++) {
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const thatByte = wordArray.words[i >>> 2] >>> 24 - i % 4 * 8 & 255;
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this.words[this.sigBytes + i >>> 2] |= thatByte << 24 - (this.sigBytes + i) % 4 * 8;
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}
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else for (let j = 0; j < wordArray.sigBytes; j += 4) this.words[this.sigBytes + j >>> 2] = wordArray.words[j >>> 2];
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this.sigBytes += wordArray.sigBytes;
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}
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};
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function digest(message) {
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return new SHA256().finalize(message).toBase64();
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}
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export { digest };
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