AESnopad

AES no-padding

Table of contents

Namespace: Com\Tecnick\Pdf\Encrypt\Type

class AESnopad

Source: src/Type/AESnopad.php:36

AES no-padding

Constants

BLOCKSIZE

Block size (IV length): \openssl_cipher_iv_length(‘aes-256-cbc’)

public const BLOCKSIZE = 16

Source: src/Type/AESnopad.php:44

IVECT

Initialization Vector (16 bytes)

public const IVECT = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

Source: src/Type/AESnopad.php:51

VALID_CIPHERS

List of valid openssl cyphers for AES encryption.

public const VALID_CIPHERS = ['aes-128-cbc', 'aes-256-cbc']

Source: src/Type/AESnopad.php:58

Methods

checkCipher()

Check if the cipher is valid and available.

public checkCipher(string $cipher): void

Parameters:

  • $cipher (string): openSSL cipher name.

Throws:

Source: src/Type/AESnopad.php:158

checkKeyLength()

Check that the key length matches the one required by the cipher.

OpenSSL zero-extends a short key and truncates a long one.

public checkKeyLength(string $key, string $cipher): void

Parameters:

  • $key (string): Encryption key.
  • $cipher (string): openSSL cipher name.

Throws:

Source: src/Type/AESnopad.php:179

decrypt()

Decrypt data that was produced by encrypt().

encrypt() zero-pads the plaintext to 16-byte alignment and applies no block padding, so this method decrypts with OPENSSL_ZERO_PADDING and returns the zero-padded plaintext. The caller strips any trailing zero bytes.

public decrypt(
    string $data,
    string $key,
    string $ivect = \self::IVECT,
    string $mode = 'aes-256-cbc'
): string

Parameters:

  • $data (string): Encrypted data (produced by encrypt()).
  • $key (string): Encryption key.
  • $ivect (string): Initialization vector (default: 16 zero bytes).
  • $mode (string): Cipher (default: aes-256-cbc).

Returns: string: Decrypted data string.

Throws:

Source: src/Type/AESnopad.php:115

encrypt()

Encrypt the data

public encrypt(
    string $data,
    string $key,
    string $ivect = \self::IVECT,
    string $mode = 'aes-256-cbc'
): string

Parameters:

  • $data (string): Data string to encrypt
  • $key (string): Encryption key
  • $ivect (string): Initialization vector
  • $mode (string): Cipher

Returns: string: Encrypted data string.

Throws:

Source: src/Type/AESnopad.php:75