openssl encrypt problem

[Frédéric HARDY]

Hello !

I'm using openssl with php.

This is my code :

<?php

#GET PRIVATE KEY PREVIOUSLY GENERATED
$private_key = openssl_get_privatekey('file://path_to_private_key',
'mypassword');

$data = "
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx
yzabcdefghijklmnopqrstuvwxyzabcdefghijlm
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx
yzabcdefghijklmnopqrstuvwxyzabcdefghijlm
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx
yzabcdefghijklmnopqrstuvwxyzabcdefghijlm
";

$data = str_pad($data, 8192, '0');

openssl_private_encrypt($data, $crypted_text, $private_key);

echo 'String crypted: ' . urlencode($crypted_text) . '<BR/>';

#GET PUBLIC KEY
$public_key = openssl_get_publickey('file://path_to_certificate');

#DECRYPT
openssl_public_decrypt($crypted_text, $decrypted_text, $public_key);
echo 'String decrypted : ' . $decrypted_text;

#GET ERRORS
echo '<UL>';

while (($error = openssl_error_string()) !== false)
echo '<LI>' . $error . "</LI>";

echo '</UL>';

?>

And openssl say :

error:0406B06E:rsa routines:RSA_padding_add_none:data too large for key size
error:0407006A:rsa routines:RSA_padding_check_PKCS1_type_1:block type is not
01
error:04067072:rsa routines:RSA_EAY_PUBLIC_DECRYPT:padding check failed

I'm using windows 98, PHP 4.3.3 and OpenSSL 0.9.7b 10 Apr 2003.
I have the same result on freeBSD :-((

Have you got any solutions ???

Best regards,

Fred

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[Jostein Tveit]

Frédéric HARDY <f...@hexanet.fr> writes:

> I'm using openssl with php.

I'm not familiar with the PHP interface to OpenSSL, but I may
give you some clues.

> error:0406B06E:rsa routines:RSA_padding_add_none:data too large for key size

The RSA key must be longer than the data you try to encrypt with
it.

> error:0407006A:rsa routines:RSA_padding_check_PKCS1_type_1:block type is not
> 01
> error:04067072:rsa routines:RSA_EAY_PUBLIC_DECRYPT:padding check failed

The encrypted data is not correctly padded.

--
Jostein Tveit (Jostei...@idi.ntnu.no)