Mcrypt

Introduction

Warning

This feature was DEPRECATED in PHP 7.1.0, and REMOVED in PHP 7.2.0.

Alternatives to this feature include:

Sodium (available as of PHP 7.2.0)
OpenSSL

Note:
This extension has been moved to the » PECL repository and is no longer bundled with PHP as of PHP 7.2.0.

This is an interface to the mcrypt library, which supports a wide variety of block algorithms such as DES, TripleDES, Blowfish (default), 3-WAY, SAFER-SK64, SAFER-SK128, TWOFISH, TEA, RC2 and GOST in CBC, OFB, CFB and ECB cipher modes. Additionally, it supports RC6 and IDEA which are considered "non-free". CFB/OFB are 8bit by default.

Installing/Configuring
Predefined Constants
Mcrypt ciphers
Mcrypt Functions
- mcrypt_create_iv — Creates an initialization vector (IV) from a random source
- mcrypt_decrypt — Decrypts crypttext with given parameters
- mcrypt_enc_get_algorithms_name — Returns the name of the opened algorithm
- mcrypt_enc_get_block_size — Returns the blocksize of the opened algorithm
- mcrypt_enc_get_iv_size — Returns the size of the IV of the opened algorithm
- mcrypt_enc_get_key_size — Returns the maximum supported keysize of the opened mode
- mcrypt_enc_get_modes_name — Returns the name of the opened mode
- mcrypt_enc_get_supported_key_sizes — Returns an array with the supported keysizes of the opened algorithm
- mcrypt_enc_is_block_algorithm — Checks whether the algorithm of the opened mode is a block algorithm
- mcrypt_enc_is_block_algorithm_mode — Checks whether the encryption of the opened mode works on blocks
- mcrypt_enc_is_block_mode — Checks whether the opened mode outputs blocks
- mcrypt_enc_self_test — Runs a self test on the opened module
- mcrypt_encrypt — Encrypts plaintext with given parameters
- mcrypt_generic — This function encrypts data
- mcrypt_generic_deinit — This function deinitializes an encryption module
- mcrypt_generic_init — This function initializes all buffers needed for encryption
- mcrypt_get_block_size — Gets the block size of the specified cipher
- mcrypt_get_cipher_name — Gets the name of the specified cipher
- mcrypt_get_iv_size — Returns the size of the IV belonging to a specific cipher/mode combination
- mcrypt_get_key_size — Gets the key size of the specified cipher
- mcrypt_list_algorithms — Gets an array of all supported ciphers
- mcrypt_list_modes — Gets an array of all supported modes
- mcrypt_module_close — Closes the mcrypt module
- mcrypt_module_get_algo_block_size — Returns the blocksize of the specified algorithm
- mcrypt_module_get_algo_key_size — Returns the maximum supported keysize of the opened mode
- mcrypt_module_get_supported_key_sizes — Returns an array with the supported keysizes of the opened algorithm
- mcrypt_module_is_block_algorithm — This function checks whether the specified algorithm is a block algorithm
- mcrypt_module_is_block_algorithm_mode — Returns if the specified module is a block algorithm or not
- mcrypt_module_is_block_mode — Returns if the specified mode outputs blocks or not
- mcrypt_module_open — Opens the module of the algorithm and the mode to be used
- mcrypt_module_self_test — This function runs a self test on the specified module
- mdecrypt_generic — Decrypts data