Commit Graph
2 Commits
Author SHA1 Message Date
Sudhakar Kuppusamy 3e4ff6ffb3 appended signatures: Parse ASN1 node
This code allows us to parse ASN1 node and allocating memory to store it.
It will work for anything where the size libtasn1 returns is right:
 - Integers
 - Octet strings
 - DER encoding of other structures

It will _not_ work for things where libtasn1 size requires adjustment:
 - Strings that require an extra NULL byte at the end
 - Bit strings because libtasn1 returns the length in bits, not bytes.

If the function returns a non-NULL value, the caller must free it.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Avnish Chouhan <avnish@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2025-10-11 15:36:34 +02:00
Sudhakar Kuppusamy 7d28bdb0b2 appended signatures: Import GNUTLS's ASN.1 description files
In order to parse PKCS#7 messages and X.509 certificates with libtasn1, we need
some information about how they are encoded. We get these from GNUTLS, which has
the benefit that they support the features we need and are well tested.

The GNUTLS files are from:

- https://github.com/gnutls/gnutls/blob/master/lib/gnutls.asn
- https://github.com/gnutls/gnutls/blob/master/lib/pkix.asn

The GNUTLS license is LGPLv2.1+, which is GPLv3 compatible, allowing us to import
it without issue.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Avnish Chouhan <avnish@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2025-10-11 15:36:34 +02:00