/**
 * Convert Node's ASN.1 DER ECDSA signature to raw R‖S per RFC 7515 §3.4.
 *
 * @param {Buffer} der    the DER-encoded SEQUENCE Node produces
 * @param {string} curve  JWK `crv` value — determines the padding length
 * @returns {Buffer}      raw R‖S of length 2 * EC_COORD_BYTES[curve]
 */
export function derToRaw(der: Buffer, curve: string): Buffer;
/**
 * Convert a raw R‖S signature to the ASN.1 DER form Node verifies.
 *
 * @param {Buffer} raw
 * @param {string} curve
 * @returns {Buffer}
 */
export function rawToDer(raw: Buffer, curve: string): Buffer;
export const EC_COORD_BYTES: Readonly<{
    'P-256': 32;
    'P-384': 48;
    'P-521': 66;
    secp256k1: 32;
}>;