decrypt problem

[Ludwig Hügelschäfer]

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Hi,

itsec.info wrote on 21.10.2006 13:54 Uhr:
> Hi
> 
> I have encrypted a large file (280MB) with gpg v1.4.2 on suse 10.0.
> By decrypting the file I get the following error message:
> 
> gpg: Problem reading source (10429120 bytes remaining)
> gpg: handle plaintext failed: Dateilesefehler
> gpg: Warnung: Verschlüsselte Botschaft ist manipuliert worden!
> 
> The last line is in German, basically it says that the text may be manipulated 
> by a 3rd party.

Issuing a german text seems to be a bug in gpg.

> Can I handle such huge files with gpg at all?

Yes. I regularly en- and decrypt files as large as 3 or 4 Gigabytes.

> If so, what is the cause of this error because I am quite sure that the file 
> had not been manipulated in the meantime.
> 
> --
> Any help is very much appreciated because this is a backup file.

The message says "Dateilesefehler" which means "File read error". I
would suspect a media or drive error. Gpg telling "manipulation of the
encrypted message" is most probably due to wrong input data and a
subsequent error message. It does not necessarily imply a 3rd party. A
bad backup media can as well be the manipulator... :-((

Ludwig
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