68 lines
1.6 KiB
TypeScript
68 lines
1.6 KiB
TypeScript
import {Result} from 'result'
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import logger from 'log'
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export type PrivKey = CryptoKey
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export type PubKey = CryptoKey
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export type KeyPair = [PrivKey, PubKey]
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const algorithm: EcdsaParams = {
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name: "ECDSA",
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hash: {name: "SHA-512"},
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}
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const log = logger('crypto:signature')
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/**
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* Create a new keypair for signing
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* @param extractable if the keys must be extractable or not
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* @return [privkey, pubkey] keys
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*/
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export async function gen_keypair(extractable: boolean = false) : Promise<KeyPair> {
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log.trace('Generating keypair')
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log.debug('Extractable :', extractable ? 'yes' : 'no')
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let key = await window.crypto.subtle.generateKey(
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{
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name: "ECDSA",
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namedCurve: "P-521"
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} as EcKeyGenParams,
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extractable,
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['sign', 'verify']
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)
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return [key.privateKey, key.publicKey]
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}
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export async function sign(privkey: PrivKey, message: Uint8Array) : Promise<Result<ArrayBuffer>> {
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log.trace('sign')
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try {
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return Result.ok(await window.crypto.subtle.sign(
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algorithm,
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privkey,
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message,
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))
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} catch(e) {
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log.warn('Signature failed')
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log.debug(`Error : ${e}`)
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}
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return Result.error([])
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}
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export async function verify(pubkey: PubKey, message: Uint8Array, signature: ArrayBuffer): Promise<boolean> {
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log.trace('Verify signature')
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try {
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return await window.crypto.subtle.verify(
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algorithm,
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pubkey,
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signature,
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message
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);
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} catch (e) {
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log.warn('Verification failed')
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log.debug(`Error : ${e}`)
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}
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return false;
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}
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