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doc: Update the file OpenPGP

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--

It should actually be completey reworked but for now I added just a
few notes.
This commit is contained in:
Werner Koch 2014-09-27 11:17:07 +02:00
parent b9b6ac9d26
commit ba2b8c20ee
1 changed files with 10 additions and 11 deletions
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@ -1,9 +1,8 @@
GnuPG and OpenPGP
=================
See RFC2440 for a description of OpenPGP. We have an annotated version
of this RFC online: http://www.gnupg.org/rfc2440.html
See RFC-4880 for a description of OpenPGP. These notes are older
than RFC-4880 and refer to the predecessor of the specs (RFC-2440).
Compatibility Notes
@ -12,7 +11,9 @@
* (9.2) states that IDEA SHOULD be implemented. This is not done
due to patent problems.
UPDATE: Since version 1.4.13 (or GnuPG 2.x with Libgcrypt 1.6)
IDEA support has been added to allow decryption of old
PGP-2 encrypted material.
All MAY features are implemented with this exception:
@ -28,17 +29,17 @@
A special format of partial packet length exists for v3 packets
which can be considered to be in compliance with RFC1991; this
format is only created if a special option is active.
UPDATE: This support has been removed with version 1.3.6.
GnuPG uses a S2K mode of 101 for GNU extensions to the secret key
protection algorithms. This number is not defined in OpenPGP, but
given the fact that this number is in a range which used at many
other places in OpenPGP for private/experimenat algorithm identifiers,
this should be not a so bad choice. The 3 bytes "GNU" are used
to identify this as a GNU extension - see the file DETAILS for a
given that this number is in a range which is used at many other
places in OpenPGP for private/experimental algorithm identifiers,
this should be not a too bad choice. The 3 bytes "GNU" are used to
identify this as a GNU extension - see the file DETAILS for a
definition of the used data formats.
Some Notes on OpenPGP / PGP Compatibility:
==========================================
@ -104,5 +105,3 @@
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