Re: [PHP] 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, $iv); -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] mcrypt_generic_init(): Iv size incorrect
Do you do this on the encryption or the decryption section or both? Tom Rogers wrote: Hi, Saturday, April 9, 2005, 3:35:21 AM, you wrote: MH I have an odd php issue with mcrypt. MH I'm getting a lot of this type of error, but only sometimes: MH mcrypt_generic_init(): Iv size incorrect; supplied length: 0, needed: 32 MH (note, the supplied length: 0 is not always the same. sometimes it is MH 1, 16, etc). MH It doesn't seem to affect the decoding of the file, but it is throwing a MH notice in to my error log. I've tried doing this: MH @mcrypt_generic_init($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); -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] mcrypt_generic_init(): Iv size incorrect
I get the following error when I try your suggestion: Unknown error type: [8] Undefined variable: iv Code: $key = md5($this-_cypherkey); $key = substr($key, 0, mcrypt_enc_get_key_size($this-td)); $iv_size = mcrypt_enc_get_iv_size($this-td); #$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $iv = pack(a.$iv_size,$iv); Tom Rogers wrote: Hi, Saturday, April 9, 2005, 3:35:21 AM, you wrote: MH I have an odd php issue with mcrypt. MH I'm getting a lot of this type of error, but only sometimes: MH mcrypt_generic_init(): Iv size incorrect; supplied length: 0, needed: 32 MH (note, the supplied length: 0 is not always the same. sometimes it is MH 1, 16, etc). MH It doesn't seem to affect the decoding of the file, but it is throwing a MH notice in to my error log. I've tried doing this: MH @mcrypt_generic_init($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); -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re[2]: [PHP] mcrypt_generic_init(): Iv size incorrect
Hi,
Wednesday, April 13, 2005, 5:14:25 AM, you wrote:
MH Do you do this on the encryption or the decryption section or both?
I do it on both, here is a class I use that may help:
class encryptClass{
var $secret;
function encryptClass(){
$this-secret = 'put secret here';
}
Function encode($id){
$eid = $iv = 0;
$len = strlen($id);
$id = $len.'-'.$id;
$td = mcrypt_module_open(MCRYPT_TripleDES, , MCRYPT_MODE_ECB, );
$key = substr($this-secret, 0, mcrypt_enc_get_key_size ($td));
$iv = pack(a.mcrypt_enc_get_iv_size($td),$iv);
mcrypt_generic_init ($td, $key, $iv);
$eid = base64_encode(mcrypt_generic ($td, $id));
mcrypt_generic_deinit($td);
return $eid;
}
Function decode($eid){
$id = $iv = 0;
$td = mcrypt_module_open (MCRYPT_TripleDES, , MCRYPT_MODE_ECB, );
$key = substr($this-secret, 0, mcrypt_enc_get_key_size ($td));
$iv = pack(a.mcrypt_enc_get_iv_size($td),$iv);
mcrypt_generic_init ($td, $key, $iv);
$id = mdecrypt_generic ($td, base64_decode($eid));
$len = strtok($id,'-');
$id = substr($id,(strlen($len)+1),$len);
mcrypt_generic_deinit($td);
return $id;
}
}
( I encode the length of the original string so I can trim the extra
rubbish that deinit leaves behind as packing)
--
regards,
Tom
--
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Re[2]: [PHP] mcrypt_generic_init(): Iv size incorrect
Hi, Wednesday, April 13, 2005, 6:04:05 AM, you wrote: MH I get the following error when I try your suggestion: MH Unknown error type: [8] Undefined variable: iv MH Code: $key = md5($this-_cypherkey); MH $key = substr($key, 0, mcrypt_enc_get_key_size($this-td)); MH $iv_size = mcrypt_enc_get_iv_size($this-td); MH #$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); MH $iv = pack(a.$iv_size,$iv); Yes I forgot to put $iv = 0; before that line. -- regards, Tom -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] mcrypt_generic_init(): Iv size incorrect
I have an odd php issue with mcrypt. I'm getting a lot of this type of error, but only sometimes: mcrypt_generic_init(): Iv size incorrect; supplied length: 0, needed: 32 (note, the supplied length: 0 is not always the same. sometimes it is 1, 16, etc). It doesn't seem to affect the decoding of the file, but it is throwing a notice in to my error log. I've tried doing this: @mcrypt_generic_init($this-td, $key, $iv) but that doesn't stop it from throwing an error. The only thing I can think is that I have mcrypt_module_close($this-td) commented out because my code was dying with it... System: Linux w/ Apache 1.3.31 PHP Version 4.3.4 libmcrypt version 2.5.7 Suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] mcrypt_generic_init(): Iv size incorrect
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); -- regards, Tom -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
