Follow the steps in order:
1.  Download and build GPG according to your operating system from
http://gnupg.org/Download the binary package directly if you do not
know how to compile the source code.

2.  Download and install OpenSSL. Most Linux distributions come with
pre-compiled OpenSSL packages. For Windows systems you may download
binaries “Win32 OpenSSL v1.0.1e Light” from the following webpage
http://slproweb.com/products/Win32OpenSSL.html
If you have problems running OpenSSL, you may want to install
version of Visual C++ 2008 `Redistributablesfor your operating
system from the same webpage.

3.  Familiarize yourself with GnuPG. You can use manpages, or online
documentation at
http://gnupg.org/documentation/howtos.en.html.
RSA Key Generation

4.  Use GPG to generate an RSA key pair (public and private keys).
Choose option for RSA 2048 bit sign key. Provide your full name, and
psu email address when asked.

5.  Export your public key in ASCII format into file public.key.

6.  Go to Angel lab2 directory to download the PGP public key of
CMPSC443 (it is called cmpsc443public.key) and import it into your
local key database (again you will use gpg command line). Use gpg –
list-keysto verify that key was imported correctly.
OpenSSL, AES generation and symmetric encryption

7.  Use openssl enccommand line symmetric cipher routine to generate a
256bit AES key in CBC mode. You should use SHA1 as a message digest
function for generating the key. Save generated secret key, IV, and
salt into file named aes.key. (Use –P opting to print out the key,
salt and IV used then immediately exit, don’t do any encryption at
this step.)
http://www.openssl.org/docs/apps/enc.html#

8.  Create a text file lab2.txtthat contains your full name and
operating system you are using for this lab. *You are to print all
commands used for keys generation, encryption, and digital
signatures in the file at step 14.*
9.  Use openssl encto encrypt lab2.txt with generated AES key. Use –
kfile option to specify generated key aes.key. Encrypted file must
be saved in base64-encoded format in file lab2_encr.txt.
GPG, asymmetric encryption, and digital signatures

10.  Use gpg to encrypt aes.key file generated in step 7 with public key
of cmpsc443public.key and store the result in ASCII format in
aes.key.asc file.

11.  Use gpg and your own private RSA key to digitally sign aes.key.asc.
Digital signature must be appendedto cipher and stored in
key_signed.txt

12.  Use gpg and your own private RSA key to digitally sign
lab2_encr.txt. Digital signature must be appendedto cipher and
stored in lab2_signed.txt

13.  Verify both created signatures.

14.  Repeat steps 8 through 13. For step 5:In lab2.txt add all commands
that you used to generate AES and RSA keys, encrypt both files, and
sign both files. Make sure to provide comments for each command used!