/**
 * Encrypts data using AES-256-CBC.
 * @param iv Initialization vector (16 bytes).
 * @param key Encryption key (32 bytes).
 * @param data Plaintext bytes.
 * @returns Ciphertext bytes with PKCS#7 padding applied.
 */
export declare function aesCbcEncrypt(iv: Uint8Array, key: Uint8Array, data: Uint8Array): Promise<Uint8Array>;
/**
 * Decrypts data using AES-256-CBC.
 * @param iv Initialization vector (16 bytes).
 * @param key Encryption key (32 bytes).
 * @param data Ciphertext bytes.
 * @returns Decrypted plaintext bytes without PKCS#7 padding.
 */
export declare function aesCbcDecrypt(iv: Uint8Array, key: Uint8Array, data: Uint8Array): Promise<Uint8Array>;
/**
 * Encrypts data using AES-256-CBC.
 * @param iv Initialization vector (16 bytes).
 * @param key Encryption key (32 bytes).
 * @param data Plaintext bytes.
 * @returns Ciphertext bytes with PKCS#7 padding applied.
 */
export declare function aesCbcEncryptSync(iv: Uint8Array, key: Uint8Array, data: Uint8Array): Uint8Array;
/**
 * Decrypts data using AES-256-CBC.
 * @param iv Initialization vector (16 bytes).
 * @param key Encryption key (32 bytes).
 * @param data Ciphertext bytes.
 * @returns Decrypted plaintext bytes without PKCS#7 padding.
 */
export declare function aesCbcDecryptSync(iv: Uint8Array, key: Uint8Array, data: Uint8Array): Uint8Array;
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