import type { PublicKey, PrivateKey, KeyPair, PublicKeyPEM, PrivateKeyPEM, KeyPairPEM } from '../types.js';
/**
 * Converts PublicKey to SPKI PEM format.
 * SPKI is "SubjectPublicKeyInfo" which is used in certificates.
 * This format is based on ASN.1 DER encoding.
 */
declare function publicKeyToPEM(publicKey: PublicKey): PublicKeyPEM;
/**
 * The returned buffers is guaranteed to unpooled.
 * This means the underlying `ArrayBuffer` is safely transferrable.
 */
declare function publicKeyFromPEM(publicKeyPEM: PublicKeyPEM): PublicKey | undefined;
declare function privateKeyToPEM(privateKey: PrivateKey): PrivateKeyPEM;
/**
 * The returned buffers is guaranteed to unpooled.
 * This means the underlying `ArrayBuffer` is safely transferrable.
 */
declare function privateKeyFromPEM(privateKeyPEM: PrivateKeyPEM): PrivateKey | undefined;
declare function keyPairToPEM(keyPair: {
    publicKey: PublicKey;
    privateKey: PrivateKey;
}): KeyPairPEM;
/**
 * The returned buffers is guaranteed to unpooled.
 * This means the underlying `ArrayBuffer` is safely transferrable.
 */
declare function keyPairFromPEM(keyPair: KeyPairPEM): KeyPair | undefined;
export { publicKeyToPEM, publicKeyFromPEM, privateKeyToPEM, privateKeyFromPEM, keyPairToPEM, keyPairFromPEM, };