Re: [PATCH 00/04] Add DSA key type

["David Härdeman" <david@2gen.com>]

On Fri, Jan 27, 2006 at 12:22:31PM +1100, Herbert Xu wrote:
>David H?rdeman <david@2gen.com> wrote:
>>
>> 3) Changes the keyctl syscall to accept six arguments (is it valid to do so?)
>>   and adds encryption as one of the supported ops for in-kernel keys.
>
>The asymmetric encryption support should be done inside the crypto/
>framework rather than as an extension to the key management system.

It is done inside the crypto/ framework. crypto/dsa.c implements the DSA 
signing as a hash crypto algorithm (since a DSA signature is two 160-bit 
integers, the result has a fixed size).

The above patch just adds the syscall to tell the in-kernel system that 
you wish to encrypt/sign something with a given key. In the case that 
the type of the given key is a DSA key, security/keys/dsa_key.c uses the 
dsa crypto alg from crypto/dsa.c to satisfy that request.

Regards,
David