On Tue, 2011-11-29 at 23:43 +0000, David Howells wrote:
> Add some useful PGP definitions from RFC 4880. These describe details of
> public key crypto as used by crypto keys for things like signature
> verification.
[...]
> +struct pgp_signature_v3_packet {
> + enum pgp_signature_version version : 8; /* == PGP_SIG_VERSION_3 */
> + u8 length_of_hashed; /* == 5 */
> + struct {
> + enum pgp_signature_type signature_type : 8;
> + struct pgp_time creation_time;
> + } hashed;
> + struct pgp_key_ID issuer;
> + enum pgp_pubkey_algo pubkey_algo : 8;
> + enum pgp_hash_algo hash_algo : 8;
> +};
> +
> +struct pgp_signature_v4_packet {
> + enum pgp_signature_version version : 8; /* == PGP_SIG_VERSION_4 */
> + enum pgp_signature_type signature_type : 8;
> + enum pgp_pubkey_algo pubkey_algo : 8;
> + enum pgp_hash_algo hash_algo : 8;
> +};
[...]
> +struct pgp_key_v3_packet {
> + enum pgp_key_version version : 8;
> + struct pgp_time creation_time;
> + u8 expiry[2]; /* 0 or time in days till
> expiry */
> + enum pgp_pubkey_algo pubkey_algo : 8;
> + u8 key_material[0];
> +};
> +
> +struct pgp_key_v4_packet {
> + enum pgp_key_version version : 8;
> + struct pgp_time creation_time;
> + enum pgp_pubkey_algo pubkey_algo : 8;
> + u8 key_material[0];
> +};
[...]
I'm a little uneasy about these structure definitions. There have been
C ABIs that set the structure alignment to at least 4 by default. It
may be better to play safe by declaring them '__packed'.
Ben.
--
Ben Hutchings
Klipstein's 4th Law of Prototyping and Production:
A fail-safe circuit will destroy others.
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