import * as https from "https";
interface ICertIssuerSubject {
    CN: string;
    O?: string;
    C?: string;
}
interface IChainCertificate {
    subject: ICertIssuerSubject;
    issuer: ICertIssuerSubject;
    validFrom: string;
    validTo: string;
    fingerprint256: string;
    serialNumber: string;
}
interface IHsts {
    enabled: boolean;
    maxAge?: number;
    includeSubDomains?: boolean;
    preload?: boolean;
}
type Grade = "A+" | "A" | "B" | "C" | "D" | "F";
interface IGrade {
    grade: Grade;
    protocols: string[];
    weakCiphers: boolean;
    reasons: string[];
}
interface IResolvedValues {
    valid: boolean;
    validationError: string | null;
    validFrom: string;
    validTo: string;
    daysRemaining: number;
    expiringSoon?: boolean;
    validFor?: string[];
    issuer: ICertIssuerSubject;
    subject: ICertIssuerSubject;
    fingerprint256: string;
    serialNumber: string;
    protocol: string;
    cipher: string;
    bits: number;
    chain: IChainCertificate[];
    chainComplete: boolean;
    hsts: IHsts | null;
    grade?: IGrade;
}
type Protocol = "https" | "smtp" | "imap" | "pop3" | "ftp";
type Options = https.RequestOptions & {
    validateSubjectAltName?: boolean;
    timeout?: number;
    warnDays?: number;
    protocol?: Protocol;
    servername?: string;
    grade?: boolean;
};
declare const sslChecker: (host: string, options?: Partial<Options>) => Promise<IResolvedValues>;
declare const sslCheckerBatch: (hosts: string[], options?: Partial<Options>) => Promise<Map<string, IResolvedValues | Error>>;
export { sslChecker, sslCheckerBatch };
export default sslChecker;