import { CryptographicStandard } from './../../../enumerator';
import { _PdfAbstractSyntaxElement } from '../asn1/abstract-syntax';
import { _PdfUniqueEncodingElement } from '../asn1/unique-encoding-element';
import { _PdfX509Certificate } from '../x509/x509-certificate';
import { _PdfMessageDigestAlgorithms } from './pdf-digest-algorithms';
import { _ICipherParam } from './pdf-interfaces';
import { PdfSignature } from './pdf-signature';
/**
 * Cryptographic Message Syntax signer helper that builds and parses PKCS#7/CMS
 * structures and provides signing utilities used by PDF signature creation.
 *
 * @private
 */
export declare class _PdfCryptographicMessageSyntaxSigner {
    /**
     * Message digest algorithm helpers used for hashing operations.
     */
    private _digestAlgorithm;
    /**
     * Version of the signed-data structure.
     */
    private _version;
    /**
     * Signer version number used in signer info.
     */
    private _signerVersion;
    /**
     * Certificate chain used for signing.
     */
    private _certificates;
    /**
     * Mapping of digest algorithm OIDs to values used in signed attributes.
     */
    private _digestObjectIdentifier;
    /**
     * Object identifier string for the selected digest algorithm.
     */
    private _digestAlgorithmObjectIdentifier;
    /**
     * The certificate used to sign the content.
     */
    private _signatureCertificate;
    /**
     * Object identifier for the encryption/signature algorithm.
     */
    private _encryptionAlgorithmObjectIdentifier;
    /**
     * Cached hash algorithm name derived from digest OID.
     */
    private _hashAlgorithm;
    /**
     * RSA-related raw data used during signing.
     */
    private _rsaData;
    /**
     * Raw signed data bytes when provided externally.
     */
    private _signedData;
    /**
     * Raw signed RSA data bytes when provided externally.
     */
    private _signedRsaData;
    /**
     * Cached digest used for signature generation.
     */
    private _digest;
    /**
     * Indicates whether a timestamp token is present on the signature.
     *
     * @private
     */
    _hasTimeStamp: boolean;
    /**
     * Raw timestamp token bytes when present.
     *
     * @private
     */
    _timeStampTokenBytes: Uint8Array;
    /**
     * When true, the signer represents timestamp-only content.
     *
     * @private
     */
    _isTimestampOnly: boolean;
    constructor(bytes: Uint8Array, subFilter: string);
    constructor(privateKey: _ICipherParam, certChain: _PdfX509Certificate[], hashAlgorithm: string, hasRsaData: boolean);
    /**
     * Initializes a CMS signer from raw bytes and a sub-filter identifier.
     *
     * @private
     * @param {Uint8Array} bytes Encoded CMS signer bytes.
     * @param {string} subFilter Sub-filter identifier (e.g., ETSI.RFC3161).
     * @returns {void}
     */
    _initializeCmsSigner(bytes: Uint8Array, subFilter: string): void;
    /**
     * Extracts a signing-time timestamp token from signer info attributes if present.
     *
     * @private
     * @param {_PdfAbstractSyntaxElement} signerInfoSeq The signer info sequence to inspect.
     * @returns {{ hasTimeStamp: boolean; tokenBytes?: Uint8Array }} Timestamp presence and raw token bytes. // eslint-disable-line
     */
    _getSignatureTimeStampToken(signerInfoSeq: _PdfAbstractSyntaxElement[]): {
        hasTimeStamp: boolean;
        tokenBytes?: Uint8Array;
    };
    /**
     * Retrieves child elements for a container, trying abstract-set-of, sequence, or decoding content octets.
     *
     * @private
     * @param {_PdfAbstractSyntaxElement} element The container element.
     * @returns {_PdfAbstractSyntaxElement[]} Child elements.
     */
    _getChildElement(element: _PdfAbstractSyntaxElement): _PdfAbstractSyntaxElement[];
    /**
     * Determines whether the provided key parameter represents an RSA key.
     *
     * @private
     * @param {_ICipherParam} key The key parameter object.
     * @returns {boolean} True if the key appears to be RSA.
     */
    _isRsaKey(key: _ICipherParam): boolean;
    /**
     * Returns the hash algorithm name corresponding to the configured digest OID.
     *
     * @private
     * @returns {string} The hash algorithm name.
     */
    _getHashAlgorithm(): string;
    /**
     * Returns the internal digest algorithm helper.
     *
     * @private
     * @returns {_PdfMessageDigestAlgorithms} Digest algorithm helper instance.
     */
    _getDigestAlgorithm(): _PdfMessageDigestAlgorithms;
    /**
     * Builds the authenticated attributes sequence (SET) including message digest and optional revocation info.
     *
     * @private
     * @param {Uint8Array} secondDigest The message digest to include.
     * @param {Uint8Array} [ocsp] Optional OCSP response bytes.
     * @param {Uint8Array[]} [crlBytes] Optional CRL bytes array.
     * @param {CryptographicStandard} [sigtype] Optional cryptographic standard (e.g., CAdES).
     * @returns {Uint8Array} Encoded attribute set bytes.
     */
    _getSequenceDataSet(secondDigest: Uint8Array, ocsp?: Uint8Array, crlBytes?: Uint8Array[], sigtype?: CryptographicStandard): Uint8Array;
    /**
     * Creates a primitive OBJECT IDENTIFIER element for the provided OID string.
     *
     * @private
     * @param {string} oid Dot-delimited object identifier string.
     * @returns {_PdfUniqueEncodingElement} The created primitive OID element.
     */
    _createPrimitiveOid(oid: string): _PdfUniqueEncodingElement;
    /**
     * Creates a primitive OCTET STRING element wrapping the provided bytes.
     *
     * @private
     * @param {Uint8Array} value Bytes to wrap.
     * @returns {_PdfUniqueEncodingElement} The created octet element.
     */
    _createPrimitiveOctet(value: Uint8Array): _PdfUniqueEncodingElement;
    /**
     * Creates a constructed element with the given tag and child elements.
     *
     * @private
     * @param {number} tag The tag number for the constructed element.
     * @param {_PdfUniqueEncodingElement[]} elements Child elements to include.
     * @returns {_PdfUniqueEncodingElement} The constructed element.
     */
    _createConstructed(tag: number, elements: _PdfUniqueEncodingElement[]): _PdfUniqueEncodingElement;
    /**
     * Encodes a dotted OID string into its ASN.1 byte representation.
     *
     * @private
     * @param {string} oidString Dot-delimited OID string.
     * @returns {Uint8Array} Encoded OID bytes.
     */
    _encodeObjectIdentifier(oidString: string): Uint8Array;
    /**
     * Encodes an array of unique elements as a concatenated sequence payload.
     *
     * @private
     * @param {_PdfUniqueEncodingElement[]} elements Elements to encode.
     * @returns {Uint8Array} Concatenated encoded bytes.
     */
    _encodeSequence(elements: _PdfUniqueEncodingElement[]): Uint8Array;
    /**
     * Serializes a `_PdfUniqueEncodingElement` into raw bytes including tag/length/value.
     *
     * @private
     * @param {_PdfUniqueEncodingElement} element Element to serialize.
     * @returns {Uint8Array} Serialized bytes.
     */
    _encodeToUniqueElement(element: _PdfUniqueEncodingElement): Uint8Array;
    /**
     * Encodes a positive integer length into length octets for DER/BER.
     *
     * @private
     * @param {number} length The length to encode.
     * @returns {number[]} Array of octets representing the length.
     */
    _encodeLength(length: number): number[];
    /**
     * Computes the digest of a certificate using the configured hash algorithm.
     *
     * @private
     * @param {_PdfX509Certificate} certificate Certificate to hash.
     * @returns {Uint8Array} Digest bytes.
     */
    _hashCertificate(certificate: _PdfX509Certificate): Uint8Array;
    /**
     * Sets precomputed signed data and selects encryption algorithm identifiers.
     *
     * @private
     * @param {Uint8Array} digest The digest bytes to set.
     * @param {Uint8Array} rsaData Optional RSA data bytes.
     * @param {string} digestEncryptionAlgorithm The encryption algorithm name (e.g., 'RSA').
     * @returns {void}
     */
    _setSignedData(digest: Uint8Array, rsaData: Uint8Array, digestEncryptionAlgorithm: string): void;
    /**
     * Encodes a sequence of certificate byte arrays into a constructed ASN.1 context element.
     *
     * @private
     * @param {Uint8Array[]} certificates Array of certificate byte arrays.
     * @returns {Uint8Array} Encoded constructed certificate set.
     */
    _encodeCertificateSet(certificates: Uint8Array[]): Uint8Array;
    /**
     * Creates a primitive encoding element with the specified tag and raw value.
     *
     * @private
     * @param {number} tag The universal tag number.
     * @param {Uint8Array} value The raw value bytes.
     * @returns {_PdfUniqueEncodingElement} The created primitive element.
     */
    _createPrimitive(tag: number, value: Uint8Array): _PdfUniqueEncodingElement;
    /**
     * Creates an ASN.1 constructed element (SEQUENCE) from provided elements.
     *
     * @private
     * @param {number} tag Tag number for the constructed element.
     * @param {_PdfUniqueEncodingElement[]} elements Child elements.
     * @returns {_PdfUniqueEncodingElement} The constructed element.
     */
    _createAsn1Constructed(tag: number, elements: _PdfUniqueEncodingElement[]): _PdfUniqueEncodingElement;
    /**
     * Creates a context-specific constructed element with the given content.
     *
     * @private
     * @param {number} tag Context tag number.
     * @param {_PdfUniqueEncodingElement[]|Uint8Array} elements Child elements or raw bytes.
     * @returns {_PdfUniqueEncodingElement} The context-constructed element.
     */
    _createContextConstructed(tag: number, elements: _PdfUniqueEncodingElement[] | Uint8Array): _PdfUniqueEncodingElement;
    /**
     * Produces a synchronous PKCS#7/CMS signature for the provided digest and returns encoded bytes.
     *
     * @private
     * @param {Uint8Array} secondDigest The digest to sign.
     * @param {Uint8Array} [timeStampResponse] Optional timestamp response bytes.
     * @param {Uint8Array} [revocation] Optional revocation data.
     * @param {Uint8Array[]} [bytes] Optional additional byte arrays.
     * @param {CryptographicStandard} [sigtype] Optional cryptographic standard selector.
     * @param {string} [hashAlgorithm] Optional hash algorithm override.
     * @returns {Uint8Array} Encoded PKCS#7/CMS signature bytes.
     */
    _sign(secondDigest: Uint8Array, timeStampResponse?: Uint8Array, revocation?: Uint8Array, bytes?: Uint8Array[], sigtype?: CryptographicStandard, hashAlgorithm?: string): Uint8Array;
    /**
     * Builds the body elements array for SignedData including version, digest algorithms, contentInfo, certificates and signerInfo.
     *
     * @private
     * @param {number} version SignedData version.
     * @param {_PdfUniqueEncodingElement[]} digestAlgorithms Digest algorithm elements.
     * @param {_PdfUniqueEncodingElement} contentInfoSeq ContentInfo sequence element.
     * @param {_PdfAbstractSyntaxElement[]} certificateElements Certificate elements.
     * @param {_PdfUniqueEncodingElement} signerInfoSeq SignerInfo element.
     * @returns {_PdfUniqueEncodingElement[]} Array of body elements.
     */
    _buildSignedDataBodyElements(version: number, digestAlgorithms: _PdfUniqueEncodingElement[], contentInfoSeq: _PdfUniqueEncodingElement, certificateElements: _PdfAbstractSyntaxElement[], signerInfoSeq: _PdfUniqueEncodingElement): _PdfUniqueEncodingElement[];
    /**
     * Concatenates a mixture of unique elements and raw byte arrays into a single sequence payload.
     *
     * @private
     * @param {Array<_PdfUniqueEncodingElement|Uint8Array>} elements Elements to concatenate.
     * @returns {Uint8Array} Concatenated bytes.
     */
    _concatAbstractSyntaxSequence(elements: Array<_PdfUniqueEncodingElement | Uint8Array>): Uint8Array;
    /**
     * Extracts the issuer element from a TBS certificate byte sequence.
     *
     * @private
     * @param {Uint8Array} tbsCertBytes The TBS certificate bytes.
     * @returns {_PdfUniqueEncodingElement} The issuer element.
     */
    _getIssuer(tbsCertBytes: Uint8Array): _PdfUniqueEncodingElement;
    /**
     * Wraps a timestamp response into the appropriate attribute structure.
     *
     * @private
     * @param {Uint8Array} timeStampResponse Raw timestamp response bytes.
     * @returns {Uint8Array} Encoded timestamp attribute bytes.
     */
    _getTimestampAttributes(timeStampResponse: Uint8Array): Uint8Array;
    /**
     * Produces an asynchronous PKCS#7/CMS signature, supporting timestamping via callbacks.
     *
     * @private
     * @param {Uint8Array} secondDigest The digest to sign.
     * @param {PdfSignature} signature Signature context containing callbacks.
     * @param {Uint8Array} [timeStampResponse] Optional timestamp response bytes.
     * @param {Uint8Array} [revocation] Optional revocation data.
     * @param {Uint8Array[]} [bytes] Optional additional byte arrays.
     * @param {CryptographicStandard} [sigtype] Optional cryptographic standard selector.
     * @returns {Promise<Uint8Array>} Encoded PKCS#7/CMS signature bytes.
     */
    _signAsync(secondDigest: Uint8Array, signature: PdfSignature, timeStampResponse?: Uint8Array, revocation?: Uint8Array, bytes?: Uint8Array[], sigtype?: CryptographicStandard): Promise<Uint8Array>;
    /**
     * Maps a common algorithm name to its OID and canonical name.
     *
     * @private
     * @param {string} [requested] Optional requested algorithm name.
     * @returns {{ oid: string; name: string }} Object identifier and canonical name. // eslint-disable-line
     */
    _getObjectIdentifierName(requested?: string): {
        oid: string;
        name: string;
    };
    /**
     * Builds a timestamp-request structure using the specified hash and algorithm OID.
     *
     * @private
     * @param {Uint8Array} hash The message hash to include.
     * @param {string} algorithmIdentifier The algorithm OID string.
     * @returns {Uint8Array} Encoded timestamp request bytes.
     */
    _createTimestampRequestWithAlgorithm(hash: Uint8Array, algorithmIdentifier: string): Uint8Array;
    /**
     * Attempts to re-encode a timestamp response into the expected attribute format.
     *
     * @private
     * @param {Uint8Array} timestampResponse Raw timestamp response bytes.
     * @returns {Uint8Array} Re-encoded timestamp attribute bytes or original input on failure.
     */
    _reEncodeTimestampResponse(timestampResponse: Uint8Array): Uint8Array;
    /**
     * Encodes a sequence of ASN.1 elements representing a timestamp token sequence.
     *
     * @private
     * @param {_PdfAbstractSyntaxElement[]} elements Elements to include in the timestamp sequence.
     * @returns {Uint8Array} Encoded sequence bytes.
     */
    _encodeTimeStampSequence(elements: _PdfAbstractSyntaxElement[]): Uint8Array;
    /**
     * Encodes a sequence length into BER/DER length bytes.
     *
     * @private
     * @param {number} length The length to encode.
     * @returns {Uint8Array} Encoded length bytes.
     */
    _encodeSequenceLength(length: number): Uint8Array;
    /**
     * Builds an unsigned attribute containing a timestamp token.
     *
     * @private
     * @param {Uint8Array} tsTokenBytes Raw timestamp token bytes.
     * @returns {_PdfUniqueEncodingElement} The unsigned attribute element.
     */
    _buildTimestampUnsignedAttribute(tsTokenBytes: Uint8Array): _PdfUniqueEncodingElement;
    /**
     * Obtains an encoded timestamp from the TSA using the provided callback on the `PdfSignature`.
     *
     * @private
     * @param {Uint8Array} secondDigest The digest to timestamp.
     * @param {PdfSignature} signature The signature context with timestamp callback.
     * @param {string} hashAlgorithm Hash algorithm name to use for TSA request.
     * @returns {Promise<Uint8Array>} Encoded timestamp bytes.
     */
    _getEncodedTimestamp(secondDigest: Uint8Array, signature: PdfSignature, hashAlgorithm: string): Promise<Uint8Array>;
    /**
     * Creates a context-specific implicit element from raw timestamp value bytes.
     *
     * @private
     * @param {number} tagNumber The context tag number.
     * @param {Uint8Array} value Raw value bytes.
     * @returns {_PdfUniqueEncodingElement} The created element.
     */
    _createContextImplicitFromTimestampValue(tagNumber: number, value: Uint8Array): _PdfUniqueEncodingElement;
    /**
     * Decodes child elements from content octets of an implicitly-tagged element.
     *
     * @private
     * @param {_PdfAbstractSyntaxElement} csImplicit Implicitly-tagged container element.
     * @returns {_PdfAbstractSyntaxElement[]} Decoded child elements.
     */
    _decodeChildrenFromContentOctets(csImplicit: _PdfAbstractSyntaxElement): _PdfAbstractSyntaxElement[];
}