import logger from 'log'
const log = logger('crypto:signature')

export async function gen_keypair() : Promise<CryptoKeyPair> {
    return crypto.subtle.generateKey(
        {
            name: "ECDSA",
            namedCurve: "P-521",
        },
        true,
        ["sign", "verify"]
    )
}
export {derive_keypair} from './signature.derive'
export async function sign(message: Uint8Array, privkey: CryptoKey) : Promise<Uint8Array> {
    log.trace("sign")
    const buffer = await crypto.subtle.sign(
        {
            name: "ECDSA",
            hash: "SHA-512"
        },
        privkey,
        message
    )
    return new Uint8Array(buffer)
}
export async function verify(message: Uint8Array, pubkey: CryptoKey, signature: Uint8Array) : Promise<boolean> {
    log.trace("verify")
    return crypto.subtle.verify(
        {
            name: "ECDSA",
            hash: "SHA-512"
        },
        pubkey,
        signature,
        message,
    )
}