/**
 * MIT License
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 * Copyright (c) 2020-present, Elastic NV
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
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import { CertificateErrorSpkiAllowlist } from '../common_types';
/**
 * Normalize user-provided PEM certificates (string, Buffer, or an array of
 * either) into a flat list of PEM strings. Each entry may itself be a bundle
 * that contains more than one certificate.
 */
export declare function normalizeCertificateErrorSpkiAllowlist(certificates?: CertificateErrorSpkiAllowlist): string[];
/**
 * Split a PEM bundle into the individual certificates it contains. Node's
 * `X509Certificate` only parses the first certificate of a bundle, so we have
 * to slice them apart ourselves to support full chains / multiple CAs.
 */
export declare function splitPemCertificates(pem: string): string[];
/**
 * Compute the base64 encoded SHA-256 fingerprint of a certificate's
 * SubjectPublicKeyInfo (SPKI). This is the exact value Chromium expects in the
 * `--ignore-certificate-errors-spki-list` switch.
 */
export declare function getSpkiFingerprint(pem: string): string;
/**
 * Build the list of SPKI fingerprints for all supplied certificates. Chromium
 * uses this list to bypass certificate errors for matching presented
 * certificates; it does not establish CA trust. Invalid certificates are
 * skipped, with a warning, so a single bad entry never aborts the whole run
 * but also never fails silently - a `certificateErrorSpkiAllowlist` entry that
 * doesn't resolve to a real file and isn't valid PEM (e.g. a typo'd path)
 * would otherwise never be allowlisted, and matching endpoints would keep
 * failing certificate validation with no indication why.
 */
export declare function getSpkiFingerprints(certificates?: CertificateErrorSpkiAllowlist): string[];
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