(PHP 4 >= 4.0.2, PHP 5)mcrypt_generic_init -- This function initializes all buffers needed for encryption

Description

int mcrypt_generic_init (resource td, string key, string iv)

The maximum length of the key should be the one obtained by

calling mcrypt_enc_get_key_size() and every

value smaller than this is legal. The IV should normally have

the size of the algorithms block size, but you must obtain the

size by calling mcrypt_enc_get_iv_size().

IV is ignored in ECB. IV MUST exist in CFB, CBC, STREAM, nOFB

and OFB modes. It needs to be random and unique (but not secret).

The same IV must be used for encryption/decryption. If you do not

want to use it you should set it to zeros, but this is not

recommended.

The function returns a negative value on error, -3 when the key length

was incorrect, -4 when there was a memory allocation problem and any

other return value is an unknown error. If an error occurs a warning will

be displayed accordingly. FALSE is returned if incorrect parameters

were passed.

You need to call this function before every call to

mcrypt_generic() or

mdecrypt_generic().

See for an example mcrypt_module_open().

Пред.

Начало

След.

mcrypt_generic_end

Уровень выше

mcrypt_generic