export declare class SshCertificate {
    #private;
    readonly serialNumber: string;
    readonly notBefore: Date;
    readonly notAfter: Date;
    readonly validity: string;
    readonly type: string;
    readonly keyId: string;
    readonly principals: string[];
    readonly extensions: Record<string, string>;
    readonly criticalOptions: Record<string, string>;
    signatureKey: {
        algorithm: string;
        type: string;
        value: string;
        thumbprint: string;
    };
    publicKey: {
        algorithm: string;
        type: string;
        value: string;
        thumbprint: string;
    };
    constructor(raw: string);
    parseSignatureKey(): Promise<void>;
    parsePublicKey(): Promise<void>;
    toString(format?: 'pem' | 'base64' | 'base64url'): Promise<string>;
    get commonName(): string;
    downloadAsPub(name?: string): Promise<void>;
}