import { KeyPair } from "../Types";
/** prefix version byte to the pub keys, required for some curve crypto functions */
export declare const generateSignalPubKey: (
  pubKey: Uint8Array | Buffer,
) => Uint8Array | Buffer;
export declare const Curve: {
  generateKeyPair: () => KeyPair;
  sharedKey: (privateKey: Uint8Array, publicKey: Uint8Array) => Buffer;
  sign: (privateKey: Uint8Array, buf: Uint8Array) => any;
  verify: (
    pubKey: Uint8Array,
    message: Uint8Array,
    signature: Uint8Array,
  ) => boolean;
};
export declare const signedKeyPair: (
  identityKeyPair: KeyPair,
  keyId: number,
) => {
  keyPair: KeyPair;
  signature: any;
  keyId: number;
};
/**
 * encrypt AES 256 GCM
 * where the tag tag is suffixed to the ciphertext
 * */
export declare function aesEncryptGCM(
  plaintext: Uint8Array,
  key: Uint8Array,
  iv: Uint8Array,
  additionalData: Uint8Array,
): Buffer;
/**
 * decrypt AES 256 GCM
 * where the auth tag is suffixed to the ciphertext
 * */
export declare function aesDecryptGCM(
  ciphertext: Uint8Array,
  key: Uint8Array,
  iv: Uint8Array,
  additionalData: Uint8Array,
): Buffer;
export declare function aesEncryptCTR(
  plaintext: Uint8Array,
  key: Uint8Array,
  iv: Uint8Array,
): Buffer;
export declare function aesDecryptCTR(
  ciphertext: Uint8Array,
  key: Uint8Array,
  iv: Uint8Array,
): Buffer;
/** decrypt AES 256 CBC where the IV is prefixed to the buffer */
export declare function aesDecrypt(buffer: Buffer, key: Buffer): Buffer;
/** decrypt AES 256 CBC */
export declare function aesDecryptWithIV(
  buffer: Buffer,
  key: Buffer,
  IV: Buffer,
): Buffer;
export declare function aesEncrypt(
  buffer: Buffer | Uint8Array,
  key: Buffer,
): Buffer;
export declare function aesEncrypWithIV(
  buffer: Buffer,
  key: Buffer,
  IV: Buffer,
): Buffer;
export declare function hmacSign(
  buffer: Buffer | Uint8Array,
  key: Buffer | Uint8Array,
  variant?: "sha256" | "sha512",
): Buffer;
export declare function sha256(buffer: Buffer): Buffer;
export declare function md5(buffer: Buffer): Buffer;
export declare function hkdf(
  buffer: Uint8Array | Buffer,
  expandedLength: number,
  info: {
    salt?: Buffer;
    info?: string;
  },
): Promise<Buffer>;
export declare function derivePairingCodeKey(
  pairingCode: string,
  salt: Buffer,
): Promise<Buffer>;