CS 472

Assignment #2

Due Midnight, Thursday Oct. 1, 2009

Use openssl (it is installed at: /usr/local/bin/openssl) to:

1. Create a public/private key pair of your own, call the files containing your public and private keys: 

<login>PublicKey.pem  & <login>PrivateKey.pem

<login> is your login name (e.g., wahabPublicKey.pem).

2. Choose a password (e.g., “have a nice day”) and store it in a file called: symPasswd.txt,

encrypt this file  using cs472PublicKey,

encode the result to base-64 and store it in a file called symPasswd.base64

3. Let A1.zip be the zip file containing all relevant files of your solution to  parts I. and II of Assignment #1.

For example, if you like to submit files: f1 f2 f3 you may use the command:  

% zip   A1.zip f1 f2 f3

4. Sign the message digest of A1.zip  using  your private key <login>PrivateKey.pem.

encode the result  to base-64 and store it in a file called: A1ZipMdSignature.base64

5. Encrypt A1.zip using the password stored in symPasswd.txt and let A1Zip.base64 be the encrypted base64 encoded file.

6. Create one file called   <login>A1Files.zip that contains:

1. <login>PublicKey.pem

2. symPasswd.base64

3. A1Zip.base64

4. A1ZipMdSignature.base64

For example:

% zip wahabA1Files.zip wahabPublicKey.pem symPasswd.base64 A1Zip.base64 A1ZipMdSignature.base64

7. Finally, submit <login>A1Files.zip to cs472 under the directory Assignment  #2.

Important Note:

Please use the names listed above since a shell script is used to grade the assignment & it is case and name sensitive.