@syncfusion/ej2-pdf/src/pdf/core/security/digital-signature/signature/cryptographic-encoder.d.ts

Feature-rich JavaScript PDF library with built-in support for loading and manipulating PDF document.

import { _PdfCipherParameter } from '../x509/x509-cipher-handler';
import { _ICipherBlock } from './pdf-interfaces';
/**
 * Provides the internal PKCS#1 v1.5 padding wrapper around a block cipher,
 * exposing RSA style input/output block sizing and processing.
 *
 * @private
 */
export declare class _PdfCryptographicEncoding implements _ICipherBlock {
    private _cipher;
    private _isEncryption;
    private _isPrivateKey;
    constructor(cipher: _ICipherBlock);
    /**
     * Gets the algorithm name with PKCS#1 padding suffix.
     *
     * @private
     * @returns {string} The algorithm name in the form "<cipher>/PKCS1Padding".
     */
    _getAlgorithmName(): string;
    /**
     * Gets the maximum input block size in bytes for the current mode with PKCS#1 padding.
     *
     * @private
     * @returns {number} The input block size in bytes.
     */
    _getInputBlock(): number;
    /**
     * Gets the maximum output block size in bytes for the current mode with PKCS#1 padding.
     *
     * @private
     * @returns {number} The output block size in bytes.
     */
    _getOutputBlock(): number;
    /**
     * Initializes the cryptographic encoding with the specified mode and key parameters.
     *
     * @private
     * @param {boolean} forEncryption Specifies whether to operate in encryption mode.
     * @param {_PdfCipherParameter} parameters The cipher parameters.
     * @returns {void} nothing.
     */
    _initialize(forEncryption: boolean, parameters: _PdfCipherParameter): void;
    /**
     * Processes a single block by applying PKCS#1 padding (on encrypt) or removing it (on decrypt).
     *
     * @private
     * @param {Uint8Array} input The input buffer containing the block.
     * @param {number} inOff The start index within the input buffer.
     * @param {number} length The number of bytes to process.
     * @returns {Uint8Array} The uintarray returns.
     */
    _processBlock(input: Uint8Array, inOff: number, length: number): Uint8Array;
    /**
     * Encodes (pads) a block using PKCS#1 v1.5 padding rules.
     *
     * @private
     * @param {Uint8Array} input The plaintext input buffer.
     * @param {number} inOff The start index within the input buffer.
     * @param {number} inLen The number of bytes to read from the input buffer.
     * @returns {Uint8Array} The padded block ready for RSA processing.
     */
    _encodeBlock(input: Uint8Array, inOff: number, inLen: number): Uint8Array;
    /**
     * Decodes (unpads) a block using PKCS#1 v1.5 padding rules and validates its structure.
     *
     * @private
     * @param {Uint8Array} input The ciphertext input buffer.
     * @param {number} inOff The start index within the input buffer.
     * @param {number} inLen The number of bytes to read from the input buffer.
     * @returns {Uint8Array} The recovered message bytes after removing padding.
     */
    _decodeBlock(input: Uint8Array, inOff: number, inLen: number): Uint8Array;
}