#! /bin/sh
#:
if test $# -eq 0
then
     echo "error, usage: grading_script <login> "
     exit 0;
fi

# set the random file environmnet.
echo '>>>' grading .... $1
cp /home/cs772/randomfile .
RANDFILE=randomfile
export RANDFILE 
#
echo .... untaring all submitted files
echo "tar xf $1A1Submission.tar produces: $1PublicKey.pem A1Password.base64 A1Solutions.base64 A1Signature.base64 " 
tar xf $1A1Submission.tar
ls -lt
#
echo  ... verify the signature of A1Solutions.base64 using A1Signature.base64
echo "openssl enc -base64  -d -in A1Signature.base64 -out A1Signature.cipher"
openssl enc -base64  -d -in A1Signature.base64 -out A1Signature.cipher
echo "openssl dgst -sha1 -verify $1PublicKey.pem -signature  A1Signature.cipher A1Solutions.base64"
openssl dgst -sha1 -verify $1PublicKey.pem -signature  A1Signature.cipher A1Solutions.base64
#
echo .... converting A1Password.base64 to A1Password.txt
echo "openssl enc -base64 -d -in A1Password.base64 -out A1Password.cipher "
openssl enc -base64 -d -in A1Password.base64 -out A1Password.cipher
echo "openssl rsautl -decrypt -inkey /home/cs772/public_html/fall12/assignments/a1/cs772PrivateKey.pem -in A1Password.cipher -out  A1Password.txt"
openssl rsautl -decrypt -inkey /home/cs772/public_html/fall12/assignments/a1/cs772PrivateKey.pem -in A1Password.cipher -out  A1Password.txt
echo '>>>' "$1" passwd is .....  :  `cat A1Password.txt`
#
echo .... decrypt A1Solutions.base64
echo "openssl enc -des3  -d -salt -a -out A1Solutions.tar -in A1Solutions.base64"
openssl enc -des3  -d -salt -a -out A1Solutions.tar -in A1Solutions.base64
#
echo ... untaring A1Solutions files
echo tar xf A1Solutions.tar
tar xf A1Solutions.tar
ls -lt
echo ....done