Re: [PATCH v3 7/7] crypto: AF_ALG - add support for key_id

[David Howells]

Tadeusz Struk <tadeusz.struk@xxxxxxxxx> wrote:

> +	keyring = request_key(&key_type_asymmetric, key_name, NULL);
> +
> +	err = -ENOKEY;
> +	if (IS_ERR(keyring))
> +		goto out;
> +
> +	pkey = keyring->payload.data[asym_crypto];

NAK.  This is liable to crash in future.  You may not assume that you know
what keyring->payload.data[asym_crypto] points to.

You may not use struct public_key outside of crypto/asymmetric_key/.  It's the
internal data of the software subtype.  I'll move it out of the global header
to remove the temptation;-).

You must use accessor functions such as verify_signature().  Feel free to add
further accessor functions such as query_asym_capabilities(),
create_signature(), encrypt_blob() and decrypt_blob() or something like that.

David