aes-ctr-concurrent/dist/src/aesCtrConcurrent.d.ts

Native TypeScript Node.js library for AES-256-CTR, enabling concurrent encryption/decryption with precise IV offset handling down to any byte level, not just full blocks.

import crypto from "crypto";
/**
 * Creates a `crypto.Cipher` instance using the AES-256-CTR algorithm for encrypting data.
 *
 * @param {Buffer} key - a 32-byte encryption key.
 * @param {Buffer} iv - a 16-byte initialization vector (IV).
 * @param {number | bigint} [startPositionInBytes=0n] - optional start position in bytes for the encryption process.
 * This allows you to set the encryption position precisely, even within a block.
 * @returns {crypto.Cipher} A `Cipher` object ready to encrypt data.
 * @throws {AesCtrConcurrentError} Throws an error if any of the parameters are invalid.
 */
export declare function createCipher(key: Buffer, iv: Buffer, startPositionInBytes?: number): crypto.Cipher;
export declare function createCipher(key: Buffer, iv: Buffer, startPositionInBytes?: bigint): crypto.Cipher;
/**
 * Creates a `crypto.Decipher` instance using the AES-256-CTR algorithm for decrypting data.
 *
 * @param {Buffer} key - a 32-byte decryption key.
 * @param {Buffer} iv - a 16-byte initialization vector (IV).
 * @param {number | bigint} [startPositionInBytes=0n] - optional start position in bytes for the decryption process.
 * This allows you to set the decryption position precisely, even within a block.
 * @returns {crypto.Decipher} A `Decipher` object ready to decrypt data.
 * @throws {AesCtrConcurrentError} Throws an error if any of the parameters are invalid.
 */
export declare function createDecipher(key: Buffer, iv: Buffer, startPositionInBytes?: number): crypto.Cipher;
export declare function createDecipher(key: Buffer, iv: Buffer, startPositionInBytes?: bigint): crypto.Cipher;
export declare function incrementIvByFullBlocks(originalIv: Buffer, fullBlocksToIncrement: bigint): Buffer;