Do you do this on the encryption or the decryption section or both?
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);
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