@bsv/sdk
Version:
BSV Blockchain Software Development Kit
369 lines • 13.7 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AESGCMDecrypt = exports.AESGCM = exports.ghash = exports.incrementLeastSignificantThirtyTwoBits = exports.multiply = exports.rightShift = exports.exclusiveOR = exports.getBytes = exports.checkBit = exports.AES = void 0;
// @ts-nocheck
const SBox = new Uint8Array([
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
]);
const Rcon = [
[0x00, 0x00, 0x00, 0x00], [0x01, 0x00, 0x00, 0x00], [0x02, 0x00, 0x00, 0x00], [0x04, 0x00, 0x00, 0x00],
[0x08, 0x00, 0x00, 0x00], [0x10, 0x00, 0x00, 0x00], [0x20, 0x00, 0x00, 0x00], [0x40, 0x00, 0x00, 0x00],
[0x80, 0x00, 0x00, 0x00], [0x1b, 0x00, 0x00, 0x00], [0x36, 0x00, 0x00, 0x00]
].map(v => new Uint8Array(v));
const mul2 = new Uint8Array(256);
const mul3 = new Uint8Array(256);
for (let i = 0; i < 256; i++) {
const m2 = ((i << 1) ^ ((i & 0x80) !== 0 ? 0x1b : 0)) & 0xff;
mul2[i] = m2;
mul3[i] = m2 ^ i;
}
function addRoundKey(state, roundKeyArray, offset) {
for (let c = 0; c < 4; c++) {
const keyCol = roundKeyArray[offset + c];
for (let r = 0; r < 4; r++) {
state[r][c] ^= keyCol[r];
}
}
}
function subBytes(state) {
for (let r = 0; r < 4; r++) {
for (let c = 0; c < 4; c++) {
state[r][c] = SBox[state[r][c]];
}
}
}
function subWord(value) {
for (let i = 0; i < 4; i++) {
value[i] = SBox[value[i]];
}
}
function rotWord(value) {
const temp = value[0];
value[0] = value[1];
value[1] = value[2];
value[2] = value[3];
value[3] = temp;
}
function shiftRows(state) {
let tmp = state[1][0];
state[1][0] = state[1][1];
state[1][1] = state[1][2];
state[1][2] = state[1][3];
state[1][3] = tmp;
tmp = state[2][0];
const tmp2 = state[2][1];
state[2][0] = state[2][2];
state[2][1] = state[2][3];
state[2][2] = tmp;
state[2][3] = tmp2;
tmp = state[3][3];
state[3][3] = state[3][2];
state[3][2] = state[3][1];
state[3][1] = state[3][0];
state[3][0] = tmp;
}
function mixColumns(state) {
for (let c = 0; c < 4; c++) {
const s0 = state[0][c];
const s1 = state[1][c];
const s2 = state[2][c];
const s3 = state[3][c];
state[0][c] = mul2[s0] ^ mul3[s1] ^ s2 ^ s3;
state[1][c] = s0 ^ mul2[s1] ^ mul3[s2] ^ s3;
state[2][c] = s0 ^ s1 ^ mul2[s2] ^ mul3[s3];
state[3][c] = mul3[s0] ^ s1 ^ s2 ^ mul2[s3];
}
}
function keyExpansion(roundLimit, key) {
const nK = key.length / 4;
const result = [];
for (let i = 0; i < key.length; i++) {
if (i % 4 === 0)
result.push([]);
result[i >> 2].push(key[i]);
}
for (let i = nK; i < 4 * roundLimit; i++) {
result[i] = [];
const temp = result[i - 1].slice();
if (i % nK === 0) {
rotWord(temp);
subWord(temp);
const r = Rcon[i / nK];
for (let j = 0; j < 4; j++) {
temp[j] ^= r[j];
}
}
else if (nK > 6 && (i % nK) === 4) {
subWord(temp);
}
for (let j = 0; j < 4; j++) {
result[i][j] = result[i - nK][j] ^ temp[j];
}
}
return result;
}
function AES(input, key) {
let i;
let j;
let round;
let roundLimit;
const state = [[], [], [], []];
const output = [];
// Since the BigNumber representation of keys ignores big endian zeroes,
// extend incoming key arrays with zeros to the smallest standard key size.
const ekey = Array.from(key);
if (ekey.length <= 16) {
while (ekey.length < 16)
ekey.unshift(0);
roundLimit = 11;
}
else if (ekey.length <= 24) {
while (ekey.length < 24)
ekey.unshift(0);
roundLimit = 13;
}
else if (key.length <= 32) {
while (ekey.length < 32)
ekey.unshift(0);
roundLimit = 15;
}
else {
throw new Error('Illegal key length: ' + String(key.length));
}
const w = keyExpansion(roundLimit, ekey);
for (let c = 0; c < 4; c++) {
state[0][c] = input[c * 4];
state[1][c] = input[c * 4 + 1];
state[2][c] = input[c * 4 + 2];
state[3][c] = input[c * 4 + 3];
}
addRoundKey(state, w, 0);
for (round = 1; round < roundLimit; round++) {
subBytes(state);
shiftRows(state);
if (round + 1 < roundLimit) {
mixColumns(state);
}
addRoundKey(state, w, round * 4);
}
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
output.push(state[j][i]);
}
}
return output;
}
exports.AES = AES;
const checkBit = function (byteArray, byteIndex, bitIndex) {
return (byteArray[byteIndex] & (0x01 << bitIndex)) !== 0 ? 1 : 0;
};
exports.checkBit = checkBit;
const getBytes = function (numericValue) {
return [
(numericValue & 0xFF000000) >>> 24,
(numericValue & 0x00FF0000) >> 16,
(numericValue & 0x0000FF00) >> 8,
numericValue & 0x000000FF
];
};
exports.getBytes = getBytes;
const createZeroBlock = function (length) {
return new Array(length).fill(0);
};
const R = [0xe1].concat(createZeroBlock(15));
const exclusiveOR = function (block0, block1) {
const len = block0.length;
const result = new Array(len);
for (let i = 0; i < len; i++) {
result[i] = block0[i] ^ block1[i];
}
return result;
};
exports.exclusiveOR = exclusiveOR;
const xorInto = function (target, block) {
for (let i = 0; i < target.length; i++) {
target[i] ^= block[i];
}
};
const rightShift = function (block) {
let i;
let carry = 0;
let oldCarry = 0;
for (i = 0; i < block.length; i++) {
oldCarry = carry;
carry = block[i] & 0x01;
block[i] = block[i] >> 1;
if (oldCarry !== 0) {
block[i] = block[i] | 0x80;
}
}
return block;
};
exports.rightShift = rightShift;
const multiply = function (block0, block1) {
const v = block1.slice();
const z = createZeroBlock(16);
for (let i = 0; i < 16; i++) {
for (let j = 7; j >= 0; j--) {
if ((block0[i] & (1 << j)) !== 0) {
xorInto(z, v);
}
if ((v[15] & 1) !== 0) {
(0, exports.rightShift)(v);
xorInto(v, R);
}
else {
(0, exports.rightShift)(v);
}
}
}
return z;
};
exports.multiply = multiply;
const incrementLeastSignificantThirtyTwoBits = function (block) {
let i;
const result = block.slice();
for (i = 15; i !== 11; i--) {
result[i] = result[i] + 1;
if (result[i] === 256) {
result[i] = 0;
}
else {
break;
}
}
return result;
};
exports.incrementLeastSignificantThirtyTwoBits = incrementLeastSignificantThirtyTwoBits;
function ghash(input, hashSubKey) {
let result = createZeroBlock(16);
for (let i = 0; i < input.length; i += 16) {
const block = result.slice();
for (let j = 0; j < 16; j++) {
block[j] ^= input[i + j] ?? 0;
}
result = (0, exports.multiply)(block, hashSubKey);
}
return result;
}
exports.ghash = ghash;
function gctr(input, initialCounterBlock, key) {
if (input.length === 0)
return [];
const output = new Array(input.length);
let counterBlock = initialCounterBlock;
let pos = 0;
const n = Math.ceil(input.length / 16);
for (let i = 0; i < n; i++) {
const counter = AES(counterBlock, key);
const chunk = Math.min(16, input.length - pos);
for (let j = 0; j < chunk; j++) {
output[pos] = input[pos] ^ counter[j];
pos++;
}
if (i + 1 < n) {
counterBlock = (0, exports.incrementLeastSignificantThirtyTwoBits)(counterBlock);
}
}
return output;
}
function AESGCM(plainText, additionalAuthenticatedData, initializationVector, key) {
let preCounterBlock;
let plainTag;
const hashSubKey = AES(createZeroBlock(16), key);
preCounterBlock = [...initializationVector];
if (initializationVector.length === 12) {
preCounterBlock = preCounterBlock.concat(createZeroBlock(3)).concat([0x01]);
}
else {
if (initializationVector.length % 16 !== 0) {
preCounterBlock = preCounterBlock.concat(createZeroBlock(16 - (initializationVector.length % 16)));
}
preCounterBlock = preCounterBlock.concat(createZeroBlock(8));
preCounterBlock = ghash(preCounterBlock.concat(createZeroBlock(4))
.concat((0, exports.getBytes)(initializationVector.length * 8)), hashSubKey);
}
const cipherText = gctr(plainText, (0, exports.incrementLeastSignificantThirtyTwoBits)(preCounterBlock), key);
plainTag = additionalAuthenticatedData.slice();
if (additionalAuthenticatedData.length === 0) {
plainTag = plainTag.concat(createZeroBlock(16));
}
else if (additionalAuthenticatedData.length % 16 !== 0) {
plainTag = plainTag.concat(createZeroBlock(16 - (additionalAuthenticatedData.length % 16)));
}
plainTag = plainTag.concat(cipherText);
if (cipherText.length === 0) {
plainTag = plainTag.concat(createZeroBlock(16));
}
else if (cipherText.length % 16 !== 0) {
plainTag = plainTag.concat(createZeroBlock(16 - (cipherText.length % 16)));
}
plainTag = plainTag.concat(createZeroBlock(4))
.concat((0, exports.getBytes)(additionalAuthenticatedData.length * 8))
.concat(createZeroBlock(4)).concat((0, exports.getBytes)(cipherText.length * 8));
return {
result: cipherText,
authenticationTag: gctr(ghash(plainTag, hashSubKey), preCounterBlock, key)
};
}
exports.AESGCM = AESGCM;
function AESGCMDecrypt(cipherText, additionalAuthenticatedData, initializationVector, authenticationTag, key) {
let preCounterBlock;
let compareTag;
// Generate the hash subkey
const hashSubKey = AES(createZeroBlock(16), key);
preCounterBlock = [...initializationVector];
if (initializationVector.length === 12) {
preCounterBlock = preCounterBlock.concat(createZeroBlock(3)).concat([0x01]);
}
else {
if (initializationVector.length % 16 !== 0) {
preCounterBlock = preCounterBlock.concat(createZeroBlock(16 - (initializationVector.length % 16)));
}
preCounterBlock = preCounterBlock.concat(createZeroBlock(8));
preCounterBlock = ghash(preCounterBlock.concat(createZeroBlock(4)).concat((0, exports.getBytes)(initializationVector.length * 8)), hashSubKey);
}
// Decrypt to obtain the plain text
const plainText = gctr(cipherText, (0, exports.incrementLeastSignificantThirtyTwoBits)(preCounterBlock), key);
compareTag = additionalAuthenticatedData.slice();
if (additionalAuthenticatedData.length === 0) {
compareTag = compareTag.concat(createZeroBlock(16));
}
else if (additionalAuthenticatedData.length % 16 !== 0) {
compareTag = compareTag.concat(createZeroBlock(16 - (additionalAuthenticatedData.length % 16)));
}
compareTag = compareTag.concat(cipherText);
if (cipherText.length === 0) {
compareTag = compareTag.concat(createZeroBlock(16));
}
else if (cipherText.length % 16 !== 0) {
compareTag = compareTag.concat(createZeroBlock(16 - (cipherText.length % 16)));
}
compareTag = compareTag.concat(createZeroBlock(4))
.concat((0, exports.getBytes)(additionalAuthenticatedData.length * 8))
.concat(createZeroBlock(4)).concat((0, exports.getBytes)(cipherText.length * 8));
// Generate the authentication tag
const calculatedTag = gctr(ghash(compareTag, hashSubKey), preCounterBlock, key);
// If the calculated tag does not match the provided tag, return null - the decryption failed.
if (calculatedTag.join() !== authenticationTag.join()) {
return null;
}
return plainText;
}
exports.AESGCMDecrypt = AESGCMDecrypt;
//# sourceMappingURL=AESGCM.js.map