"Jason A. Aras" wrote:
>
> I am working on a quick C hack to test out the use of the RSA encryption
> functions. When i make a call to RSA_public_encrypt() it sometimes
> fails (but does not return a -1) and sometimes works.
>
What makes you think it fails?
> When it fails it returns the length of a string, but a strlen() on the
> 'to' variable is not equal to what RSA_public_encrypt() returns. I do
> not know what the problem is, other than a memory problem. I first
> thought the problem was in calling RSA_private_decrypt(); because it was
> returning a packing error, but it turned out that the crypted data was
> corrupt some how.
>
strlen() wont work on encrypted data since it can contain embedded
nulls. In the case of RSA_public_encrypt() the size of the encrypted
data is always RSA_size(key) as indicated in the manual.
Steve.
--
Dr Stephen N. Henson. http://www.drh-consultancy.demon.co.uk/
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