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When using 3DES between PHP and C#, it is to be noted that there are subtle differences that if not strictly observed, will result in annoying problem encrypt/decrypt data.
1), When using a 16 bytes key, php and c# generates total different outcome string. it seems that a 24 bytes key is required for php and c# to work alike.
2), php doesnt have a "padding" option, while c# has 3 (?). My work around is to add nulls i.e. chr(0) to the end of the source string to make its size times of 8, while in c#, PaddingMode.Zeros is required.
3) the key size has to be times of 8, in php, to make it work for c#.
Mcrypt
- Introduction
- Installing/Configuring
- Predefined Constants
- Mcrypt ciphers
- Examples
- Mcrypt Functions
- mcrypt_cbc — Encrypt/decrypt data in CBC mode
- mcrypt_cfb — Encrypt/decrypt data in CFB mode
- mcrypt_create_iv — Create an initialization vector (IV) from a random source
- mcrypt_decrypt — Decrypts crypttext with given parameters
- mcrypt_ecb — Deprecated: Encrypt/decrypt data in ECB mode
- 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_mode — Checks whether the encryption of the opened mode works on blocks
- mcrypt_enc_is_block_algorithm — Checks whether the algorithm of the opened mode is a block algorithm
- 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_deinit — This function deinitializes an encryption module
- mcrypt_generic_end — This function terminates encryption
- mcrypt_generic_init — This function initializes all buffers needed for encryption
- mcrypt_generic — This function encrypts data
- mcrypt_get_block_size — Get the block size of the specified cipher
- mcrypt_get_cipher_name — Get 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 — Get the key size of the specified cipher
- mcrypt_list_algorithms — Get an array of all supported ciphers
- mcrypt_list_modes — Get an array of all supported modes
- mcrypt_module_close — Close 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_mode — Returns if the specified module is a block algorithm or not
- mcrypt_module_is_block_algorithm — This function checks whether the specified algorithm is a block algorithm
- 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
- mcrypt_ofb — Encrypt/decrypt data in OFB mode
- mdecrypt_generic — Decrypt data
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User Contributed NotesMcrypt
Anonymous
16-Oct-2009 03:11
16-Oct-2009 03:11