Re: mcrypt_generic_init(): Iv size incorrect

So this solution does work, however it doesn't answer the question as to why this is occurring in the first place. Rather then finding a work around for it, I'd like to know why PHP / mcrypt is throwing the error. Is it an issue in the library itself? Tom Rogers wrote:

Hi, Saturday, April 9, 2005, 3:35:21 AM, you wrote: MH> I have an odd php issue with mcrypt. MH> I'm getting a lot of this type of error, but only sometimes: MH> mcrypt_generic_init(): Iv size incorrect; supplied length: 0, needed: 32 MH> (note, the "supplied length: 0" is not always the same. sometimes it is MH> 1, 16, etc). MH> It doesn't seem to affect the decoding of the file, but it is throwing a MH> notice in to my error log. I've tried doing this: MH> @mcrypt_generic_init($this->td, $key, $iv) MH> but that doesn't stop it from throwing an error. MH> The only thing I can think is that I have MH> mcrypt_module_close($this->td) MH> commented out because my code was dying with it... MH> System:

MH>     Linux w/ Apache 1.3.31
MH>     PHP Version 4.3.4
MH>     libmcrypt version 2.5.7

MH> Suggestions? I do this to set a zero iv $td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_ECB, ""); $key = substr($secret, 0, mcrypt_enc_get_key_size ($td)); $iv = pack("a".mcrypt_enc_get_iv_size($td),$iv); mcrypt_generic_init ($td, $key, $iv);