1.4.3 problem with decrypting pgp2.6.3 symmetrically encrypted

vedaal at hush.com vedaal at hush.com
Mon May 29 15:19:24 CEST 2006


>when Disastry's build is configured intentionally to used twofish 
>and sha-256
>then there is nothing i can tweak in gnupg to get it to decrypt ;-
((

>here is the file:

-----BEGIN PGP MESSAGE-----
Version: 2.6.3ia-multi06
comment: (symmetric encryption, twofish) (passphrase: s)

pgAAACf8AkWW05d5cxJZMREI8uZxtVsHq07rSnCLLYaRYGTBXAi6bw8HJSo=
=Z5/z
-----END PGP MESSAGE-----

i must say,
that the more i use gnupg,
the more impressed i become,
and think it is the *ultimate* crypto program!
(Thanks to all involved in its development and maintenance !!!)

so,
starting with this strong feeling,
that there just *must* be a way to do this in gnupg,
have found it:

when symmetric encryption is used in pgp,
it uses the preferred hash,
so all that is necessary in gnupg to decrypt it,
is to run gpg --list-packets,
find the symmetric algorithm and hash,
and then put them as option is gpg.conf

so,

since sha-256 and twofish were used,

i put these options back:

cipher-algo twofish
digest-algo SHA256
s2k-cipher-algo twofish
s2k-digest-algo SHA256

then simply used the command:

c:\gnupg>gpg --pgp2 e:\tftjtju.asc

gpg: armor: BEGIN PGP MESSAGE
gpg: armor header: Version: 2.6.3ia-multi06
gpg: armor header: comment: (symmetric encryption, twofish) 
(passphrase: s)
:encrypted data packet:
        length: 39
gpg: assuming TWOFISH encrypted data
Enter passphrase:
:literal data packet:
        mode t (74), created 0, name="tft.txt",
        raw data: 3 bytes
gpg: original file name='tft.txt'
gpg: decryption okay
gpg: WARNING: message was not integrity protected
gpg: session key: 
`10:03C7C0ACE395D80182DB07AE2C30F0343EC2A809CE5FFC324B96A03F81CCC1DF
'


Thanks All,

vedaal



Concerned about your privacy? Instantly send FREE secure email, no account required
http://www.hushmail.com/send?l=480

Get the best prices on SSL certificates from Hushmail
https://www.hushssl.com?l=485




More information about the Gnupg-users mailing list