CS 472

Assignment #2

Due Midnight, Tuesday Oct. 9, 2007

This is based on openssl    (it is installed at: /usr/local/ssl/bin/openssl)

1. Create a public/private key pair for your own, call the file containing your public key:  <login>PublicKey.pem

2. Choose a password and store it in a file called: symPasswd.txt,

encrypt the file  using cs472 PublicKey,

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

3. Let A1.zip be the zip file containing the relevant files of your solution to Assignmnet # 1.

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

% zip   A1.zip f1 f2 f3

4. Sign the message digest of  A1.zip  using  your private key,

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

5. 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.