19 lines
618 B
JavaScript
19 lines
618 B
JavaScript
const getGlobal = () => {
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if (typeof globalThis !== 'undefined')
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return globalThis;
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if (typeof self !== 'undefined')
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return self;
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if (typeof window !== 'undefined')
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return window;
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throw new Error('unable to locate global object');
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};
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export default async (digest, ikm, salt, info, keylen) => {
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const { crypto: { subtle }, } = getGlobal();
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return new Uint8Array(await subtle.deriveBits({
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name: 'HKDF',
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hash: `SHA-${digest.substr(3)}`,
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salt,
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info,
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}, await subtle.importKey('raw', ikm, 'HKDF', false, ['deriveBits']), keylen << 3));
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};
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