[This might be a duplicate of Issue1110 but I found no way to add a comment]

I'm using the latest Gpg4win featuring GPGOL 1.1.1. Outlook is from Office 2007
Professional, Operatingsystem is Windows XP.

Issue:
Attachments encrypted using GPGOL 1.1.1 are broken.

Steps to reproduce:

1. Create a file test.txt, add line "testcontent", use 7zip to create a

test.txt.zip file.

2. Use Outlook to send this file to yourself using GPGOL.
3. Decrypt and save attachment
4. The original file and the received attachment are different.

Additional Details:

Original file dump:
PK^C^D
^@^@^@^@^@!<A1><ED><^D<D0>/
<90>^K^@^@^@^K^@^@^@^H^@^@^@test.txttestcontentPK^A^B^T^@
^@^@^@^@^@!<A1><ED><^D<D0>/<90>^K^@^@^@^K^@^@^@^H^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@test.txtPK^E^F^@^@^@^@^A^@^A^@6^@^@^@1^@^@^@^@^@

Decrypted file dump:
PK^CPK^C^D
^@^@^@^@^@!<A1><ED><^D<D0>/
<90>^K^@^@^@^K^@^@^@^H^@^@^@test.txttestcontentPK^A^B^T^@
^@^@^@^@^@!<A1><ED><^D<D0>/<90>^K^@^@^@^K^@^@^@^H^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@test.txtPK^E^F^@^@^@^@^A^@^A^@6^@^@^@1^@^@^@^@^@

Additional characters are added to the first line. In another test using a 3 MB
file other characters had been added close to the end of the file (at byte
position -780).

In both cases 3 bytes. Looks like it just repeated these bytes:

Example from above:

Original : PK^C    ^D
Decrypted: PK^CPK^C^D
"PK^C" is repeated

Other test with 3 MB zip-file:

Original : PK^A^B^T^@^T      ^@^@^@^H
Decrypted: PK^A^B^T^@^T^T^@^T^@^@^@^H
"^T^@^T" is repeated

More observations:

• Attachments decrypted using Linux/mutt/gnupg are broken too (this is the

reason why I believe the encryption is broken, rather than the decryption!).

• Outlook 2007 Prof on Windows 7 crashes on receiving these attachments (at

least once), on XP it doesn't.

• The attachment from the email in my sent folder is broken, too.
• Non-binary files don't seem to be affected (10k ascii public key file)
• Sending multiple attachments using the same file affects each the same way
• Other files (1 MB Word-file, 600k zip-file) weren't affected (I see no

pattern in what is and what is not affected).

Cheers,
Christoph