Library and the binary do not agree on the cipher mode a truecrypt volume is created with

[GoogleCodeExporter]

Reported
http://www.saout.de/pipermail/dm-crypt/2013-February/003178.html

crypt_init_by_name() seems to wrongly initialize TCRYPT context.

Reproducer attached.

Version 1.6.0.

Original issue reported on code.google.com by gmazyl...@gmail.com on 19 Feb 2013 at 11:28

Attachments:

• test2.c

[GoogleCodeExporter]

This in fact works as expected.

Note that CIPHER is cipher (or cipher chain in TCRYPT)
and mode is encryption mode (plus IV generator).

So if you want full cipher-mode specification, you have to use
get_cipher + get_mode.

Your modified example could look like this:

#include <libcryptsetup.h>
#include <stdio.h>
int main(int argc,char * argv[])
{
        struct crypt_device *cd;

        if (argc < 2 || crypt_init_by_name(&cd, argv[1]))
                return 1 ;

        printf("cipher: %s-%s\n", crypt_get_cipher(cd), crypt_get_cipher_mode(cd));

        crypt_free(cd);
        return 0 ;
}

Original comment by gmazyl...@gmail.com on 17 Mar 2013 at 6:49

• Changed state: Invalid