import { IEncryptionStrategy, EncryptionResult } from '../encryption-strategy.interface';
/**
 * Base class for unsupported encryption algorithms
 * These require specialized libraries or are experimental
 *
 * SOLID Principles:
 * - Single Responsibility: Handles unsupported algorithm error messaging
 * - Open/Closed: Extensible through inheritance
 * - Liskov Substitution: Can substitute IEncryptionStrategy (throws meaningful errors)
 * - Interface Segregation: Implements focused IEncryptionStrategy
 * - Dependency Inversion: Implements abstraction
 */
export declare class UnsupportedStrategy implements IEncryptionStrategy {
    readonly algorithmName: string;
    private readonly libraryName;
    private readonly reason;
    readonly isSupported = false;
    readonly requiresExternalLibrary = true;
    constructor(algorithmName: string, libraryName: string, reason: string);
    getIvSize(): number;
    getSaltSize(): number;
    encrypt(): Promise<EncryptionResult>;
    decrypt(): Promise<Blob>;
}
/**
 * ChaCha20-Poly1305 Strategy (Unsupported - Coming Soon)
 *
 * Modern authenticated encryption algorithm
 * - Faster than AES on devices without hardware AES acceleration
 * - Used in TLS 1.3, WireGuard, Signal Protocol
 * - Requires: libsodium.js (ESM bundling issues with Angular)
 * - NOT available in Web Crypto API
 */
export declare class ChaCha20Poly1305Strategy extends UnsupportedStrategy {
    constructor();
}
/**
 * XChaCha20-Poly1305 Strategy (Unsupported - Coming Soon)
 *
 * Extended nonce variant of ChaCha20-Poly1305
 * - 192-bit nonce instead of 96-bit
 * - Better for random nonces
 * - Requires: libsodium.js
 */
export declare class XChaCha20Poly1305Strategy extends UnsupportedStrategy {
    constructor();
}
/**
 * Kyber-KEM Strategy (Unsupported)
 *
 * Post-Quantum Key Encapsulation Mechanism
 * - Quantum-resistant encryption
 * - NIST PQC standardization finalist
 * - Requires: specialized PQC library
 */
export declare class KyberKemStrategy extends UnsupportedStrategy {
    constructor();
}
/**
 * Dilithium-Signature Strategy (Unsupported)
 *
 * Post-Quantum Digital Signature
 * - Quantum-resistant signatures
 * - NIST PQC standardization finalist
 * - For signing, not encryption
 * - Requires: specialized PQC library
 */
export declare class DilithiumSignatureStrategy extends UnsupportedStrategy {
    constructor();
}
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