can anyone help with the following gpg issue? Trying to decrypt an very old gpg-encrypted file (i assume it's a zip archive) fails with a simple "invalid marker packet". Trying --list-packets gives the following nice output:
gpg: invalid marker packet
gpg: [don't know]: invalid packet (ctb=1d)
gpg: [don't know]: partial length invalid for packet type 44
gpg: [don't know]: partial length invalid for packet type 25
gpg: vermutlich IDEA-verschlüsselte Daten
gpg: pinentry launched (70603 gnome3 1.1.0 /dev/pts/1 xterm-256color :0)
gpg: [don't know]: invalid packet (ctb=5b)
gpg: packet(14) with unknown version 68
gpg: vermutlich IDEA-verschlüsselte Daten
gpg: pinentry launched (70619 gnome3 1.1.0 /dev/pts/1 xterm-256color :0)
gpg: [don't know]: partial length invalid for packet type 4
gpg: [don't know]: invalid packet (ctb=00)
gpg: [don't know]: invalid packet (ctb=68)
gpg: packet(2) with unknown version 228
gpg: Entschlüsselung fehlgeschlagen: Ungültiges Paket
gpg: WARNUNG: Botschaft wurde nicht integritätsgeschützt (integrity protected)
# off=0 ctb=ca tag=10 hlen=2 plen=94 new-ctb
:marker packet: [invalid]
# off=96 ctb=fe tag=62 hlen=2 plen=54 new-ctb
:unknown packet: type 62, length 54
dump: 4f 96 32 16 9c f3 b0 f6 c8 db fa 5f db ba 25 ad 9a 3a 8a 3a 53 82 20 86
24: fe 0c 97 f9 ec 05 6c 3e 97 e5 7f 0e 7a 6d e3 32 f7 4d 24 55 c0 cd 69 6f
48: f5 16 1a 94 70 a2
# off=155 ctb=fa tag=58 hlen=2 plen=166 new-ctb
:unknown packet: type 58, length 166
dump: 3b 43 46 66 5a 45 d4 54 36 cf 62 0d ac 41 a8 30 d6 a9 03 3a 93 9c 0d 88
24: 57 31 f0 cb 20 8d ec 6d f6 ab 25 05 7f 85 e3 7b 0c 3b 8c fb 10 3d 36 16
48: 73 92 aa ac d7 85 4c 8f 06 fc f2 56 4a 31 a1 de f9 59 c7 c0 7d 67 61 35
72: a9 a5 48 c0 d9 0b c0 41 be 59 39 f9 af 56 9f d0 86 7c 44 99 53 2c 80 2c
96: fe 9c eb e3 d0 d7 f4 11 89 81 90 d7 09 3d 29 ce 46 70 e9 b6 b0 e8 00 df
120: ce 34 cc ee 90 30 3b 50 ea 77 30 48 86 9f f7 e6 b8 a2 06 a4 17 b6 68 d1
144: b3 b3 64 36 97 4a 28 4e 02 74 6e 27 d8 67 e0 9f 0e c3 61 28 a7 ab
# off=325 ctb=a4 tag=9 hlen=2 plen=182
:encrypted data packet:
length: 182
# off=509 ctb=f2 tag=50 hlen=2 plen=11 new-ctb
:unknown packet: type 50, length 11
dump: 31 f7 ad ce fb f8 55 a7 47 98 cc
# off=523 ctb=b9 tag=14 hlen=3 plen=30679
:key packet: [unknown version]
# off=31205 ctb=a6 tag=9 hlen=5 plen=2097775904
:encrypted data packet:
length: 2097775904
# off=31224 ctb=e6 tag=38 hlen=2 plen=51 new-ctb
:unknown packet: type 38, length 51
dump: 6e c8 1f 4d 1d df 82 db a9 66 0d 0d 68 06 8b 42 91 c3 0e 09 f3 a6 c3 f4
24: ae 14 6e ee 59 fc 90 c8 d0 bb 7f 1c 89 80 27 28 d7 65 40 5e 7e 26 d4 e5
48: 75 4f 5b
# off=31277 ctb=d0 tag=16 hlen=2 plen=72 new-ctb
:OpenPGP draft comment packet: "\xea`\x14m\xf8\xc1\xacM\x16\x98\xd8\xb6\x8c\xfb\x13+\xea\xf7\xcfR\xc2\xb9\xb4\xbbE]\xbf\xe8\x13l3fQt\xd2,G\x0e\x99M\x09fBa\xa5L\x09\x0fKJ\xafN`\x0d\xe70\x1c\x88\xc6i\xfd\x9b\xb4\x8b\xe7\x16\xa4\x96\xc6k\xd8\xe8"
# off=31351 ctb=dc tag=28 hlen=2 plen=123 new-ctb
:unknown packet: type 28, length 123
dump: e7 c2 43 4e b6 14 cc 3e d2 33 a7 90 96 02 24 86 1b 0c a4 12 99 41 3a d3
24: 38 da 38 59 d5 62 48 69 fe f8 ca a0 23 fe a0 85 d3 49 be 39 bb e2 0f 65
48: a9 79 b5 8c 08 0e 6e e7 9e 05 f8 21 aa c5 3a 2c de 57 14 6e d5 7d 57 88
72: f2 23 94 8e 87 3e 94 fa 01 ba 7c 5c 0d 6d 34 cf 41 a0 4b 02 48 25 37 8e
96: 29 89 a0 1b eb 59 46 c8 1c 41 70 b1 01 d9 f0 a4 a3 de 13 59 ad 68 12 84
120: 1c 94 f5
# off=31476 ctb=8a tag=2 hlen=5 plen=2390932510
:signature packet: [unknown version]
Is there a way to overcome the "invalid marker packet" error?
