Re: [PHP] bug? php4 with libmcrypt-2.2.7 From: Sascha Schumann (sascha <email protected>)
Date: 08/15/00

On Tue, 15 Aug 2000, Remco Chang wrote:

> i have been battling libmcrypt for the past 2 days and came with zilch so
> far... i am about to raise the white flag and submit it to the bug list
> unless someone here could convince me otherwise...
>
> there is very little support/documentation on how php talks to libmcrypt.
> after going through the source code, i noticed that the functions listed
> on the web page http://www.php.net/manual/ref.mcrypt.php are not all
> implemented... the following are the only functions supported:
> PHP_FE(mcrypt_ecb, NULL)
> PHP_FE(mcrypt_cbc, NULL)
> PHP_FE(mcrypt_cfb, NULL)
> PHP_FE(mcrypt_ofb, NULL)
> PHP_FE(mcrypt_get_cipher_name, NULL)
> PHP_FE(mcrypt_get_block_size, NULL)
> PHP_FE(mcrypt_get_key_size, NULL)
> PHP_FE(mcrypt_create_iv, NULL)
>
> even then, mcrypt_ecb, cbc, cfb, ofb are not working correctly. instead
> of returning srings, they return binary garbage. this is a huge problem
> because the decrypt function takes a string as input. because of this, i
> cannot go through the encrypt/decrypt process and get back the original
> message that i wanted encrypted.

    Your analysis is completely wrong. Strings in PHP are 8-bit
    clean. The output of the encryption process almost always
    looks like "binary garbage" (if it would make sense to you,
    it would be a bad algorithm).

    PHP 4.0.2 supports libmcrypt 2.4.x and also adds some
    additional user-level functions. These are already documented
    in the manual (there should be a note about them being
    supported starting at 4.0.2. If not, please submit a
    documentation bug report).

    - Sascha 

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