The message from Werner Koch was in PGP-MIME format signed with the following
signature:
-----BEGIN PGP SIGNATURE-----
Version: GNUPG v0.2.18b (GNU/Linux)
Comment: This is an alpha version!
owJ4nAFiAZ3+iQFfAwUBNW5l6wNvEbj/PqoLEANNhAUfeHwuqDBk+lqwe2pjVqlqnu8QkwG6
EifZNeDyaQMK6UVz7/lEisGwvE1v6NXN8Nhzt2gpgH7JQ2s85LePYX7/sAhJPA+qJjzFkCC5
CeGMWJp6pJilDwmPMWylRCYCbKaSzxv7Cx11AflnWg40t/CHYhODE3AVkr7TjIz0zik272Xt
FYhR5LM1SuCbgrg8zBFmPZgzrWeaTMK2v2n+75Z4HmycxsIFHR6oKWnr6HKniY88v2R6KpyX
BtGfGwaWARwdk6BUzGsArxaq1Dcgzw1UvWvEAk6ctflLhvH/my5NRmHJjGLfo6Pjq7pvowdH
5NknyYlJESyAlmzaOFdPkcWCsE15KDgDAe8eQ2/v8hUqipU48o+7vQWyf7bW/MhCChaj5mSA
8z9qhYaM+bGmEeLvAtj0wqvPcbUlVAi4z7PcgLyLFkyQ1Lq5vYMWsV6rJg==
=8x3k
-----END PGP SIGNATURE-----
When you convert to hex, you get:
000000 a3 02 78 9c 01 62 01 9d fe 89 01 5f 03 05 01 35
...
0xa3 is a compressed packet. PGP-MIME messages should have a signature
packet here. Also, there is not much point in compressing a signature
packet as it is not compressible.
BTW I saw an encrypted message on coderpunks produced with what I
think is the same software, and the length field in the tag byte of the
symmetrically encrypted packet was a binary 11, which should mean that
there are no length bytes, but in fact there were two length bytes.
Also, the message itself was followed by two spurious bytes of zeros.
Hal