import { RtpPacket } from '../media/rtp.js';
import { type SrtpKeyingMaterial } from '../types.js';
export declare class SrtpContext {
    private sessionKey;
    private sessionSalt;
    private authKey;
    private roc;
    private lastSeq;
    private initialized;
    private highestIndex;
    private replayMask;
    private authTagLen;
    private readonly ivBuffer;
    private readonly ssrcBuffer;
    private readonly indexBuffer;
    private readonly rocBuffer;
    constructor(keying: SrtpKeyingMaterial, authTagLen?: number);
    setAuthKeying(keying: SrtpKeyingMaterial): void;
    protect(packet: RtpPacket): Uint8Array;
    unprotect(data: Uint8Array): RtpPacket;
    private updateRoc;
    private estimateRoc;
    private isReplayed;
    private advanceReplay;
    private packetIndex;
    private generateIv;
    private computeAuthTag;
}
export declare class SrtpSession {
    private static readonly MAX_RECV_CONTEXTS;
    private readonly sendKey;
    private readonly recvKey;
    private readonly sendAuthLen?;
    private readonly recvAuthLen?;
    private readonly sendContexts;
    private readonly recvContexts;
    private sendAuthKeying;
    constructor(sendKey: SrtpKeyingMaterial, recvKey: SrtpKeyingMaterial, sendAuthLen?: number, recvAuthLen?: number);
    protect(packet: RtpPacket): Uint8Array;
    unprotect(data: Uint8Array): RtpPacket;
    setSendAuthKeying(keying: SrtpKeyingMaterial): void;
}
export declare class SrtcpContext {
    private readonly cipherKey;
    private readonly authKey;
    private readonly salt;
    private readonly authTagLen;
    private index;
    constructor(keying: SrtpKeyingMaterial, authTagLen?: number);
    protect(rtcp: Uint8Array, senderSsrc: number): Uint8Array;
}
export declare class SrtpError extends Error {
    type: 'packet_too_short' | 'auth_failed' | 'replay' | 'encryption' | 'decryption';
    constructor(type: SrtpError['type'], message: string);
}