Daily Archives: 8 October 2016


Fedora 24: Solution to gcrypt.h: No such file or directory

Recently we tried to compile cisco-decrypt.c* on Fedora 24 (64bit).
We got the full source code from the website of Maurice Massar.
Download full source code here: cisco-decrypt.c (compressed) (174 downloads)

We needed this tool to configure the Gnome 3 native network client to connect to a specific Cisco VPN network.
During the configuration we setup a “Cisco Compatible VPN (vpnc)” VPN.

* Please note that this tool is NOT a hacking nor cracking tool. In order for you to make any use of it, you need to have a valid PCF file given to you by your system administrator. It is only useful when you need to get the group password to configure a system that does not accept the PCF file with the encrypted password.

To compile the code you can use one of the following two methods:

Compilation method 1

gcc -Wall -o cisco-decrypt cisco-decrypt.c $(libgcrypt-config --libs --cflags)

If the package libgcrypt-devel is not installed you will get a prompt message as follows, which will instruct you to install the missing package.
You need to type y to both questions so that the installation will proceed. Once the installation is done, execute once more the compilation command.

As you can see below, you might get a whole bunch of errors, ignore them and try to compile once more. It seems to be a bug that will not affect the end result (at least in this scenario).

gcc -Wall -o cisco-decrypt cisco-decrypt.c $(libgcrypt-config --libs --cflags)
bash: libgcrypt-config: command not found...
Install package 'libgcrypt-devel' to provide command 'libgcrypt-config'? [N/y] y

Proceed with changes? [N/y] y

gcc: error: Waiting: No such file or directory
gcc: error: in: No such file or directory
gcc: error: queue...: No such file or directory
gcc: error: Loading: No such file or directory
gcc: error: list: No such file or directory
gcc: error: of: No such file or directory
gcc: error: packages....: No such file or directory
gcc: error: The: No such file or directory
gcc: error: following: No such file or directory
gcc: error: packages: No such file or directory
gcc: error: have: No such file or directory
gcc: error: to: No such file or directory
gcc: error: be: No such file or directory
gcc: error: installed:: No such file or directory
gcc: error: libgcrypt-devel-1.6.6-1.fc24.x86_64: No such file or directory
gcc: error: Development: No such file or directory
gcc: error: files: No such file or directory
gcc: error: for: No such file or directory
gcc: error: the: No such file or directory
gcc: error: libgcrypt: No such file or directory
gcc: error: package: No such file or directory
gcc: error: libgpg-error-devel-1.24-1.fc24.x86_64: No such file or directory
gcc: error: Development: No such file or directory
gcc: error: files: No such file or directory
gcc: error: for: No such file or directory
gcc: error: the: No such file or directory
gcc: error: libgpg-error: No such file or directory
gcc: error: package: No such file or directory
gcc: error: Waiting: No such file or directory
gcc: error: in: No such file or directory
gcc: error: queue...: No such file or directory
gcc: error: Waiting: No such file or directory
gcc: error: for: No such file or directory
gcc: error: authentication...: No such file or directory
gcc: error: Waiting: No such file or directory
gcc: error: in: No such file or directory
gcc: error: queue...: No such file or directory
gcc: error: Downloading: No such file or directory
gcc: error: packages...: No such file or directory
gcc: error: Requesting: No such file or directory
gcc: error: data...: No such file or directory
gcc: error: Testing: No such file or directory
gcc: error: changes...: No such file or directory
gcc: error: Installing: No such file or directory
gcc: error: packages...: No such file or directory

Compilation method 2

In case the above method does not work for you for some reason, you can try the following.

gcc -Wall -o cisco-decrypt cisco-decrypt.c -lgcrypt

If the package libgcrypt-devel is not installed you will get an error as follows.

gcc -Wall -o cisco-decrypt cisco-decrypt.c -lgcrypt
cisco-decrypt.c:30:20: fatal error: gcrypt.h: No such file or directory
 #include <gcrypt.h>
                    ^
compilation terminated.

In this case use

sudo dnf install libgcrypt-devel

to install the missing library and try again to compile.

To use

Open your PCF file with a text editor. Find the line that starts with enc_GroupPwd= and copy the characters after that.

Paste the characters as the first command line argument to the newly compiled application. The password will be the line returned right after.

./cisco-decrypt 886E2FC74BFCD8B6FAF47784C386A50D0C1A5D0528D1E682B7EBAB6B2E91E792E389914767193F9114FA26C1E192034754F85FC97ED36509
Th!sIsMyK3y#

Other notes

In the case you get these errors:

/tmp/ccHrH1kZ.o: In function `c_decrypt':
cisco-decrypt.c:(.text+0x243): undefined reference to `gcry_md_hash_buffer'
cisco-decrypt.c:(.text+0x267): undefined reference to `gcry_md_hash_buffer'
cisco-decrypt.c:(.text+0x2b4): undefined reference to `gcry_md_hash_buffer'
cisco-decrypt.c:(.text+0x31d): undefined reference to `gcry_cipher_open'
cisco-decrypt.c:(.text+0x33b): undefined reference to `gcry_cipher_setkey'
cisco-decrypt.c:(.text+0x356): undefined reference to `gcry_cipher_setiv'
cisco-decrypt.c:(.text+0x382): undefined reference to `gcry_cipher_decrypt'
cisco-decrypt.c:(.text+0x391): undefined reference to `gcry_cipher_close'
/tmp/ccHrH1kZ.o: In function `main':
cisco-decrypt.c:(.text+0x41e): undefined reference to `gcry_check_version'
collect2: error: ld returned 1 exit status

It most probably means that you did not add on your compilation command one of the following two parameters

  1. $(libgcrypt-config –libs –cflags)
  2. -lgcrypt

You need one of these two options to be on the command line to compile.

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Using Sierra Wireless SL Series Development Kit on Windows 10

We got our hands on a SL Series Development Kit by Sierra Wireless.

sierra-wireless-sl-series-development-kit-with-sl8084t

Sierra Wireless SL Series Development Kit with SL8084T

sierra-wireless-sl-series-development-kit-with-sl6087

Sierra Wireless SL Series Development Kit with SL6087

Inside there was a USB with a couple of manuals and an installation package named Open_AT_Application_Framework_v2-51_Full_Installer.zip.
We installed the software, which included the USB drivers and an IDE based on eclipse named Developer Studio.
The version of Developer Studio was 2.3.2 and we installed it on Windows 10.
After the installation was complete, we did a check for updated as well.developer-studio-2-3-2

When we tried to connect to the device from the Target Management perspective, we could not connect to the COM1 port on the computer as it was not visible at all in the Devices List.

Later, we found that there were newer versions of the tool online (version 3 and version 4). So we downloaded the version 3 from this link that we found on this page on the line

“Please use the provided installer for Open AT Application Framework“.

Installing this version solved our problem, as we were able to connect to the device and load custom applications to it.

The version that worked for us was 3.6.0.

developer-studio-3-6-0

Note: We did not find a version 4 for Open AT Application Framework and that is why we used version 3.