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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | 143x 143x 572x 424038x 424038x 424038x 424038x 424038x 424038x 424038x 424038x 143x 248614x 248614x 248614x 143x 8114x 8114x 8114x 8114x 143x 286x 2690536x 2690536x 2690536x 2690536x 143x 2018x 2018x 2018x 2018x 2018x 2018x 143x 143x 143x 143x 143x 143x | import * as crypto from 'crypto';
type AES256Callback = (key: Buffer, iv: Buffer, input: Buffer, output: Buffer) => number | Error;
export function makeAES256Hook(
method: 'createCipheriv' | 'createDecipheriv',
mode: 'aes-256-cbc' | 'aes-256-ctr'
): AES256Callback {
return function (key: Buffer, iv: Buffer, input: Buffer, output: Buffer): number | Error {
let result;
try {
const cipher = crypto[method](mode, key, iv);
cipher.setAutoPadding(false);
result = cipher.update(input);
const final = cipher.final();
Iif (final.length > 0) {
result = Buffer.concat([result, final]);
}
} catch (e) {
return e;
}
result.copy(output);
return result.length;
};
}
export function randomHook(buffer: Buffer, count: number): number | Error {
try {
crypto.randomFillSync(buffer, 0, count);
} catch (e) {
return e;
}
return count;
}
export function sha256Hook(input: Buffer, output: Buffer): number | Error {
let result;
try {
result = crypto.createHash('sha256').update(input).digest();
} catch (e) {
return e;
}
result.copy(output);
return result.length;
}
type HMACHook = (key: Buffer, input: Buffer, output: Buffer) => number | Error;
export function makeHmacHook(algorithm: 'sha512' | 'sha256'): HMACHook {
return (key: Buffer, input: Buffer, output: Buffer): number | Error => {
let result;
try {
result = crypto.createHmac(algorithm, key).update(input).digest();
} catch (e) {
return e;
}
result.copy(output);
return result.length;
};
}
export function signRsaSha256Hook(key: Buffer, input: Buffer, output: Buffer): number | Error {
let result;
try {
const signer = crypto.createSign('sha256WithRSAEncryption');
const privateKey = Buffer.from(
`-----BEGIN PRIVATE KEY-----\n${key.toString('base64')}\n-----END PRIVATE KEY-----\n`
);
result = signer.update(input).end().sign(privateKey);
} catch (e) {
return e;
}
result.copy(output);
return result.length;
}
export const aes256CbcEncryptHook = makeAES256Hook('createCipheriv', 'aes-256-cbc');
export const aes256CbcDecryptHook = makeAES256Hook('createDecipheriv', 'aes-256-cbc');
export const aes256CtrEncryptHook = makeAES256Hook('createCipheriv', 'aes-256-ctr');
export const aes256CtrDecryptHook = makeAES256Hook('createDecipheriv', 'aes-256-ctr');
export const hmacSha512Hook = makeHmacHook('sha512');
export const hmacSha256Hook = makeHmacHook('sha256');
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