Trouble decrypting AES256 symmetric encrypted file

John Clizbe JPClizbe at
Mon Sep 19 16:59:12 CEST 2005

Hash: SHA1

Alphax wrote:
> JIH, DOUG Y. wrote:
>> I got the following messages when I tried to decrypt a file.gpg with
>> the size 4,920,412,393 bytes.
>> gpg: AES256 encrypted data
>> gpg: encrypted with 1 passphrase
>> gpg: [don't know]: invalid packet (ctb=7e)
>> gpg: [don't know]: invalid packet (ctb=32)
>> gpg: WARNING: encrypted message has been manipulated!
>> gpg: [don't know]: invalid packet (ctb=2c)
>> The file was produced by encrypting with
>> gpg -c --cipher aes256 file
>> When the error messages occured, the output file has a size of
>> 614,055,611 bytes.
>> Can anyone please help!
>> Using gpg version 1.4.2, official Windows version
> I have a feeling Windows has problems with files this large, esp. on NTFS.
I recall this being a common error with GnuPG on Win32.

The usual work-around if I recall correctly is to use redirection:

	gpg < file.gpg > file.out

Has the file been manipulated or moved between systems since it was encrypted?

- --
John P. Clizbe                   Inet:   JPClizbe(a)comcast DOT nyet
Golden Bear Networks             PGP/GPG KeyID: 0x608D2A10
"Be who you are and say what you feel because those who mind don't matter
and those who matter don't mind." - Dr Seuss, "Oh the Places You'll Go"
Version: GnuPG v1.4.3-cvs-3894-2005-09-16 (Windows 2000 SP4)
Comment: When cryptography is outlawed, b25seSBvdXRsYXdzIHdpbGwgdXNlIG
Comment: Be part of the £33t ECHELON -- Use Strong Encryption.
Comment: It's YOUR right - for the time being.
Comment: Using GnuPG with Thunderbird -


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