/**
 * @param {Uint8Array} pdfBuffer
 */
export function checkForSubFilter(pdfBuffer: Uint8Array): void;
/**
 * @param {Uint8Array | string} signedData
 */
export function getSignatureMeta(signedData: Uint8Array | string): {
    reason: string | null | undefined;
    contactInfo: string | null | undefined;
    location: string | null | undefined;
    name: string | null | undefined;
};
/**
 * @param {forge.Bytes} signature
 */
export function getMessageFromSignature(signature: forge.Bytes): {
    content?: string | forge.util.ByteBuffer | undefined;
    recipients: forge.pkcs7.Recipient[];
    addRecipient(certificate: forge.pki.Certificate): void;
    encrypt(key?: forge.util.ByteBuffer, cipher?: forge.OID): void;
    findRecipient(cert: forge.pki.Certificate): forge.pkcs7.Recipient | null;
    decrypt(recipient: forge.pkcs7.Recipient, privKey: forge.pki.rsa.PrivateKey): void;
    toAsn1(): forge.asn1.Asn1;
    rawCapture: any;
    /**
     * @type {forge.pki.Certificate[]}
     */
    certificates: forge.pki.Certificate[];
} | {
    content?: string | forge.util.ByteBuffer | undefined;
    contentInfo?: {
        value: any[];
    } | undefined;
    certificates: forge.pki.Certificate[];
    addCertificate(certificate: forge.pki.Certificate | string): void;
    addSigner(options: {
        key: forge.pki.rsa.PrivateKey | string;
        certificate: forge.pki.Certificate | string;
        digestAlgorithm: string;
        authenticatedAttributes?: Array<{
            type: string;
            value?: string | undefined;
        }> | undefined;
    }): void;
    sign(options?: {
        detached?: boolean | undefined;
    }): void;
    toAsn1(): forge.asn1.Asn1;
    rawCapture: any;
};
/**
 * @param {Uint8Array} pdf
 */
export function preparePDF(pdf: Uint8Array): Buffer<ArrayBufferLike>;
import forge from "node-forge";
import { Buffer } from "node:buffer";