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Просмотр файла: index.js
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.hashSha256 = exports.sha256 = exports.sha256nodeCrypto = exports.sha256js = void 0;
var buffer_1 = require("buffer/");
/**
* From https://github.com/crypto-browserify/sha.js/blob/master/sha256.js
*
* A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
* in FIPS 180-2
* Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
*
*/
var sha256js = /** @class */ (function () {
function sha256js() {
this._blockSize = 64;
this._finalSize = 56;
this._len = 0;
this._w = new Array(64);
this._a = 0x6a09e667;
this._b = 0xbb67ae85;
this._c = 0x3c6ef372;
this._d = 0xa54ff53a;
this._e = 0x510e527f;
this._f = 0x9b05688c;
this._g = 0x1f83d9ab;
this._h = 0x5be0cd19;
this._block = buffer_1.Buffer.alloc(this._blockSize);
}
sha256js.prototype.update = function (data, encoding) {
if (typeof data === 'string') {
encoding = encoding || 'utf8';
data = buffer_1.Buffer.from(data, encoding);
}
var block = this._block;
var blockSize = this._blockSize;
var length = data.length;
var accum = this._len;
for (var offset = 0; offset < length;) {
var assigned = accum % blockSize;
var remainder = Math.min(length - offset, blockSize - assigned);
for (var i = 0; i < remainder; i++) {
block[assigned + i] = data[offset + i];
}
accum += remainder;
offset += remainder;
if ((accum % blockSize) === 0) {
this._update(block);
}
}
this._len += length;
return this;
};
sha256js.prototype.digest = function (encoding) {
var rem = this._len % this._blockSize;
this._block[rem] = 0x80;
// zero (rem + 1) trailing bits, where (rem + 1) is the smallest
// non-negative solution to the equation (length + 1 + (rem + 1)) === finalSize mod blockSize
this._block.fill(0, rem + 1);
if (rem >= this._finalSize) {
this._update(this._block);
this._block.fill(0);
}
var bits = this._len * 8;
// uint32
if (bits <= 0xffffffff) {
this._block.writeUInt32BE(bits, this._blockSize - 4);
// uint64
}
else {
var lowBits = (bits & 0xffffffff) >>> 0;
var highBits = (bits - lowBits) / 0x100000000;
this._block.writeUInt32BE(highBits, this._blockSize - 8);
this._block.writeUInt32BE(lowBits, this._blockSize - 4);
}
this._update(this._block);
var hash = buffer_1.Buffer.alloc(32);
hash.writeInt32BE(this._a, 0);
hash.writeInt32BE(this._b, 4);
hash.writeInt32BE(this._c, 8);
hash.writeInt32BE(this._d, 12);
hash.writeInt32BE(this._e, 16);
hash.writeInt32BE(this._f, 20);
hash.writeInt32BE(this._g, 24);
hash.writeInt32BE(this._h, 28);
return encoding ? hash.toString(encoding) : hash;
};
sha256js.prototype.ch = function (x, y, z) {
return z ^ (x & (y ^ z));
};
sha256js.prototype.maj = function (x, y, z) {
return (x & y) | (z & (x | y));
};
sha256js.prototype.sigma0 = function (x) {
return (x >>> 2 | x << 30) ^ (x >>> 13 | x << 19) ^ (x >>> 22 | x << 10);
};
sha256js.prototype.sigma1 = function (x) {
return (x >>> 6 | x << 26) ^ (x >>> 11 | x << 21) ^ (x >>> 25 | x << 7);
};
sha256js.prototype.gamma0 = function (x) {
return (x >>> 7 | x << 25) ^ (x >>> 18 | x << 14) ^ (x >>> 3);
};
sha256js.prototype.gamma1 = function (x) {
return (x >>> 17 | x << 15) ^ (x >>> 19 | x << 13) ^ (x >>> 10);
};
sha256js.prototype._update = function (M) {
var W = this._w;
var a = this._a | 0;
var b = this._b | 0;
var c = this._c | 0;
var d = this._d | 0;
var e = this._e | 0;
var f = this._f | 0;
var g = this._g | 0;
var h = this._h | 0;
var i = 0;
for (; i < 16; ++i)
W[i] = M.readInt32BE(i * 4);
for (; i < 64; ++i)
W[i] = (this.gamma1(W[i - 2]) + W[i - 7] + this.gamma0(W[i - 15]) + W[i - 16]) | 0;
for (var j = 0; j < 64; ++j) {
var T1 = (h + this.sigma1(e) + this.ch(e, f, g) + sha256js.K[j] + W[j]) | 0;
var T2 = (this.sigma0(a) + this.maj(a, b, c)) | 0;
h = g;
g = f;
f = e;
e = (d + T1) | 0;
d = c;
c = b;
b = a;
a = (T1 + T2) | 0;
}
this._a = (a + this._a) | 0;
this._b = (b + this._b) | 0;
this._c = (c + this._c) | 0;
this._d = (d + this._d) | 0;
this._e = (e + this._e) | 0;
this._f = (f + this._f) | 0;
this._g = (g + this._g) | 0;
this._h = (h + this._h) | 0;
};
sha256js.K = [
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
];
return sha256js;
}());
exports.sha256js = sha256js;
var sha256nodeCrypto = /** @class */ (function () {
function sha256nodeCrypto() {
if (!sha256nodeCrypto.useCryptoModuleCache || sha256nodeCrypto.nodeCryptoCreateHash === undefined) {
sha256nodeCrypto.nodeCryptoCreateHash = require('crypto').createHash;
}
this.hash = sha256nodeCrypto.nodeCryptoCreateHash('sha256');
}
sha256nodeCrypto.prototype.update = function (data, encoding) {
this.hash.update(data, encoding);
return this;
};
sha256nodeCrypto.prototype.digest = function (encoding) {
if (encoding) {
return this.hash.digest(encoding);
}
else {
return this.hash.digest();
}
};
sha256nodeCrypto.useCryptoModuleCache = true;
return sha256nodeCrypto;
}());
exports.sha256nodeCrypto = sha256nodeCrypto;
var _nodeCryptoAvailable = undefined;
function isNodeCryptoAvailable() {
if (sha256nodeCrypto.useCryptoModuleCache && _nodeCryptoAvailable !== undefined) {
return _nodeCryptoAvailable;
}
var isAvailable = false;
try {
if (typeof require === 'function') {
var cryptoModule = require('crypto');
isAvailable = cryptoModule && typeof cryptoModule.createHash === 'function';
}
}
catch (error) {
// ignore
}
_nodeCryptoAvailable = isAvailable;
return isAvailable;
}
var sha256 = /** @class */ (function () {
function sha256() {
if (isNodeCryptoAvailable()) {
this.instance = new sha256nodeCrypto();
}
else {
this.instance = new sha256js();
}
}
sha256.prototype.update = function (data, encoding) {
this.instance.update(data, encoding);
return this;
};
sha256.prototype.digest = function (encoding) {
if (encoding) {
return this.instance.digest(encoding);
}
else {
return this.instance.digest();
}
};
return sha256;
}());
exports.sha256 = sha256;
/**
* Use Nodejs `crypto` module if available, otherwise uses js implementation.
* @param data Input data to hash.
*/
function hashSha256(data) {
return new sha256().update(data).digest();
}
exports.hashSha256 = hashSha256;
exports.default = hashSha256;
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