31 lines
821 B
TypeScript
31 lines
821 B
TypeScript
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import * as hash from 'hash.js';
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import { arrayify, Arrayish } from '../src.ts/utils/bytes';
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import * as errors from '../src.ts/utils/errors';
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interface HashFunc {
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update(chunk: Uint8Array): HashFunc;
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digest(): Uint8Array;
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}
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interface HmacFunc extends HashFunc {
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(hashFunc: HashFunc, key: Uint8Array): HashFunc;
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}
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const hmac: HmacFunc = hash['hmac'];
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const supportedAlgorithms = { sha256: true, sha512: true };
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export function computeHmac(algorithm: string, key: Arrayish, data: Arrayish): Uint8Array {
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if (!supportedAlgorithms[algorithm]) {
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errors.throwError('unsupported algorithm ' + algorithm, errors.UNSUPPORTED_OPERATION, { operation: 'hmac', algorithm: algorithm });
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}
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return arrayify(
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hmac(hash[algorithm], arrayify(key)).update(arrayify(data)).digest()
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);
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}
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