(PHP 4 >= 4.0.2)
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.
You need to call this function before every
mcrypt_generic() or
mdecrypt_generic().
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