> Hello,
>
> I'm trying to compare the results of the openssl tool with the cryptool
> 1.4.31
>
> + Filename topsecret.txt which only contains the character 'a'
> + Encrypt it with DES using CBC mode with key and iv = 0 produces the
> result '32ea a0fa 4f77 fb92'
>
> user@debian:~$ xxd topsecret.tx
>From: owner-openssl-users On Behalf Of Luis Rocha
>Sent: Monday, October 28, 2013 18:48
>I'm trying to compare the results of the openssl tool with the cryptool
1.4.31
>+ Filename topsecret.txt which only contains the character 'a'
>+ Encrypt it with DES using CBC mode with key and iv = 0 produc
On Tue, Oct 29, 2013 at 05:26:39PM +0100, Luis Rocha wrote:
> btw a interesting phenomenon where encrypting with the same key reveals the
> plaintext.
There are two such keys among the 4 weak DES keys:
0101010101010101
fefefefefefefefe
1f1f1f1f1f1f1f1f
e0e0e0e0e0e0e0e0
http:
Thanks guys! really learning cool stuff I will take it from here and
appreciate your time.
btw a interesting phenomenon where encrypting with the same key reveals the
plaintext.
echo -n 'deadbeef' > topsecret.txt
xxd topsecret.txt
6465 6164 6265 6566
openssl enc -des-cbc -nosalt -nopad -K 0
On Tue, Oct 29, 2013 at 03:54:50PM +0100, Luis Rocha wrote:
> The X.923 padding attaches to a complete message block another block of
> zeros: A = 00 00 00 00 00 00 00 00
I would expect the last padding byte to be 08, not 00, since 8 padding
bytes were added. PKCS#7 padding for the same complete
why not use -nopad when calling openssl enc, and add the zero padding
yourself?
> echo -n '' > topsecret.txt
> head -c8 /dev/zero >> topsecret.txt
> xxd topsecret.txt
000: 6161 6161 6161 6161
> openssl enc -des-cbc -K 0101010101010101 -
On Tue, Oct 29, 2013 at 03:18:44PM +0100, Luis Rocha wrote:
> In the cryptool I'm only able to introduce the 8 bytes key and not the IV.
> The documentation from CrypTool says" CBC mode is used with zero
> initialization vector and X.923 padding."
>
> user@debian:~$ openssl enc -des-cbc -K 010101
Ok so I read more about it and for DES a block consists of 64 bit = 16 hex
characters
The X.923 padding attaches to a complete message block another block of
zeros: A = 00 00 00 00 00 00 00 00
so I created a text file with 64 bits (16 hex characters)
$echo -n '' > topsecret.txt
$xxd t
Thank you Victor!
In the cryptool I'm only able to introduce the 8 bytes key and not the IV.
The documentation from CrypTool says" CBC mode is used with zero
initialization vector and X.923 padding."
user@debian:~$ openssl enc -des-cbc -K 0101010101010101 -iv
-nosalt -in topsecre
On Mon, Oct 28, 2013 at 11:48:22PM +0100, Luis Rocha wrote:
> + Filename topsecret.txt which only contains the character 'a'
> + Encrypt it with DES using CBC mode with key and iv = 0 produces the
> result '32ea a0fa 4f77 fb92'
>
> user@debian:~$ openssl enc -des-cbc -K 0 -iv 0 -nosalt -in topsec
Hello,
I'm trying to compare the results of the openssl tool with the cryptool
1.4.31
+ Filename topsecret.txt which only contains the character 'a'
+ Encrypt it with DES using CBC mode with key and iv = 0 produces the
result '32ea a0fa 4f77 fb92'
user@debian:~$ xxd topsecret.txt
000: 61
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