export interface ISecureCredentialManager {
    initialize(): Promise<void>;
    setCredential(service: string, key: string, value: string): Promise<void>;
    getCredential(service: string, key: string): Promise<string | undefined>;
    removeCredential(service: string, key: string): Promise<void>;
    listServices(): Promise<string[]>;
    hasCredentials(service: string): Promise<boolean>;
    migrateFromConfig(configData: any): Promise<void>;
}
export declare class SecureCredentialManager implements ISecureCredentialManager {
    private logger;
    private credentialsDir;
    private credentialsFile;
    private keyFile;
    private masterKey?;
    private algorithm;
    private keyLength;
    private ivLength;
    private tagLength;
    private saltLength;
    private keyDerivationIterations;
    private currentVersion;
    constructor();
    setCredential(service: string, key: string, value: string): Promise<void>;
    getCredential(service: string, key: string): Promise<string | undefined>;
    removeCredential(service: string, key: string): Promise<void>;
    listServices(): Promise<string[]>;
    hasCredentials(service: string): Promise<boolean>;
    private isInitialized;
    initialize(): Promise<void>;
    migrateFromConfig(configData: any): Promise<void>;
    private validateCredentialInput;
    private validateServiceAndKey;
    private validateNoInjection;
    private loadCredentials;
    private saveCredentials;
    private encryptCredential;
    private decryptCredential;
    private initializeMasterKey;
    private validateCredentialFileIntegrity;
    private isValidEncryptedData;
    private clearSensitiveData;
    private ensureSecureDirectory;
    private maskValue;
}
export declare const secureCredentials: SecureCredentialManager;
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