An excellent idea Ger, I will try it now, thanks for replying.

Nick

On 11 Feb 2009, at 14:04, Ger Hobbelt wrote:

Since from the looks of it your feeding enc an entire disc image, the
first question of course is: have you tried your process with a
smaller file, say a snippet of about 1K of data or even less?

(I'm thinking about hidden boundary issues here, so best would be to
check the process with something tiny, then try a  bigger size, and so
on.)


On Wed, Feb 11, 2009 at 2:55 PM, Nickfx <n...@csitech.co.uk> wrote:

24 hours on and still stuck!



Nickfx wrote:

Hi, first post here and I wonder if anyone with a larger brain than me can
help?

I'm in Windows XP Pro and using DD to image a disk and then pipe to
openssl to encrypt. I'm using the -pass pass:'anotherpassword' switch to make decryption by the user as easy as possible. It looks like this:-

dd if=\\.\PhysicalDrive0 conv=noerror | openssl enc -aes-128-ecb - salt
-out encryptedfile.enc

I enter the passphrase when prompted and verify.

Encryption appears to work and I can see the SALTED line at the start of
the file in a Hexviewer.

However when I try to decrypt using:-

openssl enc -d -aes-128-ecb -salt -in encryptedfile.enc -out finished.dd

and type in the passphrase..

I get the following:-

bad decrypt
4064:error:00065064:digital envelope routines:EVP_DecryptFinal_ex:bad
decrypt: .\crypto\evp\evp_enc.c:330:

I've seen alot of posts that say the passphrase is wrong however I and a collegue have tried this 20 or 30 times with phrases from 123 to hello to
more complex.  We havent got it wrong each time!

When I look at the resultant file I can see NTFS at the start of the file meaning it has sort of worked but when I hash compare the input and output
they are different so something hasnt worked.

I am well and truly stuck!

Thanks in advance

Nick

Nick


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