82 lines
1.8 KiB
JavaScript
82 lines
1.8 KiB
JavaScript
/**
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* RSA-OAEP is an asymmetric keypair used for encryption
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*/
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import * as webcrypto from 'lib0/webcrypto'
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export { exportKeyJwk } from './common.js'
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/**
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* @typedef {Array<'encrypt'|'decrypt'>} Usages
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*/
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/**
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* @type {Usages}
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*/
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const defaultUsages = ['encrypt', 'decrypt']
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/**
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* Note that the max data size is limited by the size of the RSA key.
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*
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* @param {CryptoKey} key
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* @param {Uint8Array<ArrayBuffer>} data
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* @return {PromiseLike<Uint8Array<ArrayBuffer>>}
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*/
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export const encrypt = (key, data) =>
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webcrypto.subtle.encrypt(
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{
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name: 'RSA-OAEP'
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},
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key,
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data
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).then(buf => new Uint8Array(buf))
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/**
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* @experimental The API is not final!
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*
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* Decrypt some data using AES-GCM method.
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*
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* @param {CryptoKey} key
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* @param {Uint8Array<ArrayBuffer>} data
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* @return {PromiseLike<Uint8Array>} decrypted buffer
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*/
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export const decrypt = (key, data) =>
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webcrypto.subtle.decrypt(
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{
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name: 'RSA-OAEP'
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},
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key,
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data
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).then(data => new Uint8Array(data))
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/**
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* @param {Object} opts
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* @param {boolean} [opts.extractable]
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* @param {Usages} [opts.usages]
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* @return {Promise<CryptoKeyPair>}
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*/
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export const generateKeyPair = ({ extractable = false, usages = defaultUsages } = {}) =>
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webcrypto.subtle.generateKey(
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{
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name: 'RSA-OAEP',
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modulusLength: 4096,
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publicExponent: new Uint8Array([1, 0, 1]),
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hash: 'SHA-256'
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},
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extractable,
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usages
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)
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/**
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* @param {any} jwk
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* @param {Object} opts
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* @param {boolean} [opts.extractable]
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* @param {Usages} [opts.usages]
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*/
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export const importKeyJwk = (jwk, { extractable = false, usages } = {}) => {
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if (usages == null) {
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/* c8 ignore next */
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usages = jwk.key_ops || defaultUsages
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}
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return webcrypto.subtle.importKey('jwk', jwk, { name: 'RSA-OAEP', hash: 'SHA-256' }, extractable, /** @type {Usages} */ (usages))
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}
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