@langchain/core
Version:
Core LangChain.js abstractions and schemas
449 lines (448 loc) • 16.6 kB
JavaScript
// @ts-nocheck
// Inlined to deal with portability issues with importing crypto module
/**
* [js-sha256]{@link https://github.com/emn178/js-sha256}
*
* @version 0.11.1
* @author Chen, Yi-Cyuan [emn178@gmail.com]
* @copyright Chen, Yi-Cyuan 2014-2025
* @license MIT
*/
/*jslint bitwise: true */
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.sha256 = void 0;
var HEX_CHARS = "0123456789abcdef".split("");
var EXTRA = [-2147483648, 8388608, 32768, 128];
var SHIFT = [24, 16, 8, 0];
var 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,
];
var OUTPUT_TYPES = ["hex", "array", "digest", "arrayBuffer"];
var blocks = [];
function Sha256(is224, sharedMemory) {
if (sharedMemory) {
blocks[0] =
blocks[16] =
blocks[1] =
blocks[2] =
blocks[3] =
blocks[4] =
blocks[5] =
blocks[6] =
blocks[7] =
blocks[8] =
blocks[9] =
blocks[10] =
blocks[11] =
blocks[12] =
blocks[13] =
blocks[14] =
blocks[15] =
0;
this.blocks = blocks;
}
else {
this.blocks = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
}
if (is224) {
this.h0 = 0xc1059ed8;
this.h1 = 0x367cd507;
this.h2 = 0x3070dd17;
this.h3 = 0xf70e5939;
this.h4 = 0xffc00b31;
this.h5 = 0x68581511;
this.h6 = 0x64f98fa7;
this.h7 = 0xbefa4fa4;
}
else {
// 256
this.h0 = 0x6a09e667;
this.h1 = 0xbb67ae85;
this.h2 = 0x3c6ef372;
this.h3 = 0xa54ff53a;
this.h4 = 0x510e527f;
this.h5 = 0x9b05688c;
this.h6 = 0x1f83d9ab;
this.h7 = 0x5be0cd19;
}
this.block = this.start = this.bytes = this.hBytes = 0;
this.finalized = this.hashed = false;
this.first = true;
this.is224 = is224;
}
Sha256.prototype.update = function (message) {
if (this.finalized) {
return;
}
var notString, type = typeof message;
if (type !== "string") {
if (type === "object") {
if (message === null) {
throw new Error(ERROR);
}
else if (ARRAY_BUFFER && message.constructor === ArrayBuffer) {
message = new Uint8Array(message);
}
else if (!Array.isArray(message)) {
if (!ARRAY_BUFFER || !ArrayBuffer.isView(message)) {
throw new Error(ERROR);
}
}
}
else {
throw new Error(ERROR);
}
notString = true;
}
var code, index = 0, i, length = message.length, blocks = this.blocks;
while (index < length) {
if (this.hashed) {
this.hashed = false;
blocks[0] = this.block;
this.block =
blocks[16] =
blocks[1] =
blocks[2] =
blocks[3] =
blocks[4] =
blocks[5] =
blocks[6] =
blocks[7] =
blocks[8] =
blocks[9] =
blocks[10] =
blocks[11] =
blocks[12] =
blocks[13] =
blocks[14] =
blocks[15] =
0;
}
if (notString) {
for (i = this.start; index < length && i < 64; ++index) {
blocks[i >>> 2] |= message[index] << SHIFT[i++ & 3];
}
}
else {
for (i = this.start; index < length && i < 64; ++index) {
code = message.charCodeAt(index);
if (code < 0x80) {
blocks[i >>> 2] |= code << SHIFT[i++ & 3];
}
else if (code < 0x800) {
blocks[i >>> 2] |= (0xc0 | (code >>> 6)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
else if (code < 0xd800 || code >= 0xe000) {
blocks[i >>> 2] |= (0xe0 | (code >>> 12)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | ((code >>> 6) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
else {
code =
0x10000 +
(((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
blocks[i >>> 2] |= (0xf0 | (code >>> 18)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | ((code >>> 12) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | ((code >>> 6) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
}
}
this.lastByteIndex = i;
this.bytes += i - this.start;
if (i >= 64) {
this.block = blocks[16];
this.start = i - 64;
this.hash();
this.hashed = true;
}
else {
this.start = i;
}
}
if (this.bytes > 4294967295) {
this.hBytes += (this.bytes / 4294967296) << 0;
this.bytes = this.bytes % 4294967296;
}
return this;
};
Sha256.prototype.finalize = function () {
if (this.finalized) {
return;
}
this.finalized = true;
var blocks = this.blocks, i = this.lastByteIndex;
blocks[16] = this.block;
blocks[i >>> 2] |= EXTRA[i & 3];
this.block = blocks[16];
if (i >= 56) {
if (!this.hashed) {
this.hash();
}
blocks[0] = this.block;
blocks[16] =
blocks[1] =
blocks[2] =
blocks[3] =
blocks[4] =
blocks[5] =
blocks[6] =
blocks[7] =
blocks[8] =
blocks[9] =
blocks[10] =
blocks[11] =
blocks[12] =
blocks[13] =
blocks[14] =
blocks[15] =
0;
}
blocks[14] = (this.hBytes << 3) | (this.bytes >>> 29);
blocks[15] = this.bytes << 3;
this.hash();
};
Sha256.prototype.hash = function () {
var a = this.h0, b = this.h1, c = this.h2, d = this.h3, e = this.h4, f = this.h5, g = this.h6, h = this.h7, blocks = this.blocks, j, s0, s1, maj, t1, t2, ch, ab, da, cd, bc;
for (j = 16; j < 64; ++j) {
// rightrotate
t1 = blocks[j - 15];
s0 = ((t1 >>> 7) | (t1 << 25)) ^ ((t1 >>> 18) | (t1 << 14)) ^ (t1 >>> 3);
t1 = blocks[j - 2];
s1 = ((t1 >>> 17) | (t1 << 15)) ^ ((t1 >>> 19) | (t1 << 13)) ^ (t1 >>> 10);
blocks[j] = (blocks[j - 16] + s0 + blocks[j - 7] + s1) << 0;
}
bc = b & c;
for (j = 0; j < 64; j += 4) {
if (this.first) {
if (this.is224) {
ab = 300032;
t1 = blocks[0] - 1413257819;
h = (t1 - 150054599) << 0;
d = (t1 + 24177077) << 0;
}
else {
ab = 704751109;
t1 = blocks[0] - 210244248;
h = (t1 - 1521486534) << 0;
d = (t1 + 143694565) << 0;
}
this.first = false;
}
else {
s0 =
((a >>> 2) | (a << 30)) ^
((a >>> 13) | (a << 19)) ^
((a >>> 22) | (a << 10));
s1 =
((e >>> 6) | (e << 26)) ^
((e >>> 11) | (e << 21)) ^
((e >>> 25) | (e << 7));
ab = a & b;
maj = ab ^ (a & c) ^ bc;
ch = (e & f) ^ (~e & g);
t1 = h + s1 + ch + K[j] + blocks[j];
t2 = s0 + maj;
h = (d + t1) << 0;
d = (t1 + t2) << 0;
}
s0 =
((d >>> 2) | (d << 30)) ^
((d >>> 13) | (d << 19)) ^
((d >>> 22) | (d << 10));
s1 =
((h >>> 6) | (h << 26)) ^
((h >>> 11) | (h << 21)) ^
((h >>> 25) | (h << 7));
da = d & a;
maj = da ^ (d & b) ^ ab;
ch = (g & h) ^ (~g & e);
t1 = f + s1 + ch + K[j + 1] + blocks[j + 1];
t2 = s0 + maj;
g = (c + t1) << 0;
c = (t1 + t2) << 0;
s0 =
((c >>> 2) | (c << 30)) ^
((c >>> 13) | (c << 19)) ^
((c >>> 22) | (c << 10));
s1 =
((g >>> 6) | (g << 26)) ^
((g >>> 11) | (g << 21)) ^
((g >>> 25) | (g << 7));
cd = c & d;
maj = cd ^ (c & a) ^ da;
ch = (f & g) ^ (~f & h);
t1 = e + s1 + ch + K[j + 2] + blocks[j + 2];
t2 = s0 + maj;
f = (b + t1) << 0;
b = (t1 + t2) << 0;
s0 =
((b >>> 2) | (b << 30)) ^
((b >>> 13) | (b << 19)) ^
((b >>> 22) | (b << 10));
s1 =
((f >>> 6) | (f << 26)) ^
((f >>> 11) | (f << 21)) ^
((f >>> 25) | (f << 7));
bc = b & c;
maj = bc ^ (b & d) ^ cd;
ch = (f & g) ^ (~f & h);
t1 = e + s1 + ch + K[j + 3] + blocks[j + 3];
t2 = s0 + maj;
e = (a + t1) << 0;
a = (t1 + t2) << 0;
this.chromeBugWorkAround = true;
}
this.h0 = (this.h0 + a) << 0;
this.h1 = (this.h1 + b) << 0;
this.h2 = (this.h2 + c) << 0;
this.h3 = (this.h3 + d) << 0;
this.h4 = (this.h4 + e) << 0;
this.h5 = (this.h5 + f) << 0;
this.h6 = (this.h6 + g) << 0;
this.h7 = (this.h7 + h) << 0;
};
Sha256.prototype.hex = function () {
this.finalize();
var h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3, h4 = this.h4, h5 = this.h5, h6 = this.h6, h7 = this.h7;
var hex = HEX_CHARS[(h0 >>> 28) & 0x0f] +
HEX_CHARS[(h0 >>> 24) & 0x0f] +
HEX_CHARS[(h0 >>> 20) & 0x0f] +
HEX_CHARS[(h0 >>> 16) & 0x0f] +
HEX_CHARS[(h0 >>> 12) & 0x0f] +
HEX_CHARS[(h0 >>> 8) & 0x0f] +
HEX_CHARS[(h0 >>> 4) & 0x0f] +
HEX_CHARS[h0 & 0x0f] +
HEX_CHARS[(h1 >>> 28) & 0x0f] +
HEX_CHARS[(h1 >>> 24) & 0x0f] +
HEX_CHARS[(h1 >>> 20) & 0x0f] +
HEX_CHARS[(h1 >>> 16) & 0x0f] +
HEX_CHARS[(h1 >>> 12) & 0x0f] +
HEX_CHARS[(h1 >>> 8) & 0x0f] +
HEX_CHARS[(h1 >>> 4) & 0x0f] +
HEX_CHARS[h1 & 0x0f] +
HEX_CHARS[(h2 >>> 28) & 0x0f] +
HEX_CHARS[(h2 >>> 24) & 0x0f] +
HEX_CHARS[(h2 >>> 20) & 0x0f] +
HEX_CHARS[(h2 >>> 16) & 0x0f] +
HEX_CHARS[(h2 >>> 12) & 0x0f] +
HEX_CHARS[(h2 >>> 8) & 0x0f] +
HEX_CHARS[(h2 >>> 4) & 0x0f] +
HEX_CHARS[h2 & 0x0f] +
HEX_CHARS[(h3 >>> 28) & 0x0f] +
HEX_CHARS[(h3 >>> 24) & 0x0f] +
HEX_CHARS[(h3 >>> 20) & 0x0f] +
HEX_CHARS[(h3 >>> 16) & 0x0f] +
HEX_CHARS[(h3 >>> 12) & 0x0f] +
HEX_CHARS[(h3 >>> 8) & 0x0f] +
HEX_CHARS[(h3 >>> 4) & 0x0f] +
HEX_CHARS[h3 & 0x0f] +
HEX_CHARS[(h4 >>> 28) & 0x0f] +
HEX_CHARS[(h4 >>> 24) & 0x0f] +
HEX_CHARS[(h4 >>> 20) & 0x0f] +
HEX_CHARS[(h4 >>> 16) & 0x0f] +
HEX_CHARS[(h4 >>> 12) & 0x0f] +
HEX_CHARS[(h4 >>> 8) & 0x0f] +
HEX_CHARS[(h4 >>> 4) & 0x0f] +
HEX_CHARS[h4 & 0x0f] +
HEX_CHARS[(h5 >>> 28) & 0x0f] +
HEX_CHARS[(h5 >>> 24) & 0x0f] +
HEX_CHARS[(h5 >>> 20) & 0x0f] +
HEX_CHARS[(h5 >>> 16) & 0x0f] +
HEX_CHARS[(h5 >>> 12) & 0x0f] +
HEX_CHARS[(h5 >>> 8) & 0x0f] +
HEX_CHARS[(h5 >>> 4) & 0x0f] +
HEX_CHARS[h5 & 0x0f] +
HEX_CHARS[(h6 >>> 28) & 0x0f] +
HEX_CHARS[(h6 >>> 24) & 0x0f] +
HEX_CHARS[(h6 >>> 20) & 0x0f] +
HEX_CHARS[(h6 >>> 16) & 0x0f] +
HEX_CHARS[(h6 >>> 12) & 0x0f] +
HEX_CHARS[(h6 >>> 8) & 0x0f] +
HEX_CHARS[(h6 >>> 4) & 0x0f] +
HEX_CHARS[h6 & 0x0f];
if (!this.is224) {
hex +=
HEX_CHARS[(h7 >>> 28) & 0x0f] +
HEX_CHARS[(h7 >>> 24) & 0x0f] +
HEX_CHARS[(h7 >>> 20) & 0x0f] +
HEX_CHARS[(h7 >>> 16) & 0x0f] +
HEX_CHARS[(h7 >>> 12) & 0x0f] +
HEX_CHARS[(h7 >>> 8) & 0x0f] +
HEX_CHARS[(h7 >>> 4) & 0x0f] +
HEX_CHARS[h7 & 0x0f];
}
return hex;
};
Sha256.prototype.toString = Sha256.prototype.hex;
Sha256.prototype.digest = function () {
this.finalize();
var h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3, h4 = this.h4, h5 = this.h5, h6 = this.h6, h7 = this.h7;
var arr = [
(h0 >>> 24) & 0xff,
(h0 >>> 16) & 0xff,
(h0 >>> 8) & 0xff,
h0 & 0xff,
(h1 >>> 24) & 0xff,
(h1 >>> 16) & 0xff,
(h1 >>> 8) & 0xff,
h1 & 0xff,
(h2 >>> 24) & 0xff,
(h2 >>> 16) & 0xff,
(h2 >>> 8) & 0xff,
h2 & 0xff,
(h3 >>> 24) & 0xff,
(h3 >>> 16) & 0xff,
(h3 >>> 8) & 0xff,
h3 & 0xff,
(h4 >>> 24) & 0xff,
(h4 >>> 16) & 0xff,
(h4 >>> 8) & 0xff,
h4 & 0xff,
(h5 >>> 24) & 0xff,
(h5 >>> 16) & 0xff,
(h5 >>> 8) & 0xff,
h5 & 0xff,
(h6 >>> 24) & 0xff,
(h6 >>> 16) & 0xff,
(h6 >>> 8) & 0xff,
h6 & 0xff,
];
if (!this.is224) {
arr.push((h7 >>> 24) & 0xff, (h7 >>> 16) & 0xff, (h7 >>> 8) & 0xff, h7 & 0xff);
}
return arr;
};
Sha256.prototype.array = Sha256.prototype.digest;
Sha256.prototype.arrayBuffer = function () {
this.finalize();
var buffer = new ArrayBuffer(this.is224 ? 28 : 32);
var dataView = new DataView(buffer);
dataView.setUint32(0, this.h0);
dataView.setUint32(4, this.h1);
dataView.setUint32(8, this.h2);
dataView.setUint32(12, this.h3);
dataView.setUint32(16, this.h4);
dataView.setUint32(20, this.h5);
dataView.setUint32(24, this.h6);
if (!this.is224) {
dataView.setUint32(28, this.h7);
}
return buffer;
};
const sha256 = (...strings) => {
return new Sha256(false, true).update(strings.join("")).hex();
};
exports.sha256 = sha256;