#!/usr/bin/zsh
#
# Iterates through various tests on the tomb script

T="../../tomb"
source ${T} source
dummypass=test
dummypassnew=changetest

GLOBAL_RESULT=0

notice() { print; yes "${@}"; print; }
error() { _warning "     ${@}"; }
tt() {
	start_loops=(`sudo losetup -a |cut -d: -f1`)
	start_temps=(`find /dev/shm -name 'tomb*'`)
	${T} -D ${=@}
	res=$?
	loops=(`sudo losetup -a |cut -d: -f1`)
	temps=(`find /dev/shm -name 'tomb*'`)

	{ test "${#start_loops}" = "${#loops}" } || {
	    error "loop device usage change to ${#loops}" }
	{ test "${#start_temps}" = "${#temps}" } || {
	    error "temp files usage change to ${#temps}" }
	print "     Tomb command returns $res"
	return $res
}

# check for auxiliary programs
KDF=1
STEGHIDE=1
RESIZER=1
command -v steghide > /dev/null || STEGHIDE=0
command -v e2fsck resize2fs > /dev/null || RESIZER=0
command -v tomb-kdb-pbkdf2 > /dev/null || KDF=0
command -v qrencode > /dev/null || QRENCODE=0


typeset -A results
tests=(dig forge lock badpass open close passwd chksum bind setkey)
{ test $RESIZER = 1 } && { tests+=(resize) }
{ test $KDF = 1 } && { tests+=(kdforge kdfpass kdflock kdfopen) }
{ test $STEGHIDE = 1 } && { tests+=(stgin stgout stgopen stgpipe stgimpl) }
{ test $QRENCODE = 1 } && { tests+=(qrenc) }

notice "Loading test suite"

# functions that can be called singularly

test-tomb-create() {

    notice "wiping all test.tomb* in /tmp"
    sudo rm -f /tmp/test.tomb{,.key,.new.key}

    notice "Testing creation: dig"

    tt dig -s 20 /tmp/test.tomb

    { test $? = 0 } && { results+=(dig SUCCESS) }

    notice "Testing creation: forge"

    tt forge /tmp/test.tomb.key \
        --ignore-swap --unsafe --tomb-pwd ${dummypass} --use-urandom 

    { test $? = 0 } && { 
        results+=(forge SUCCESS)
        # 
        say "Dump of clear key contents to examine them:"
        print ${dummypass} \
	        | gpg --batch --passphrase-fd 0 --no-tty --no-options -d /tmp/test.tomb.key \
	        | hexdump -C
        echo --
    }

    notice "Testing creation: lock"

    tt lock /tmp/test.tomb -k /tmp/test.tomb.key \
        --ignore-swap --unsafe --tomb-pwd ${dummypass} 

    { test $? = 0 } && { results+=(lock SUCCESS) }
}

test-bind-hooks() {
    notice "Testing bind hooks"
    tt list test
    [[ $? = 0 ]] || {
        tt --ignore-swap --unsafe --tomb-pwd ${dummypass} \
            open /tmp/test.tomb -k /tmp/test.tomb.key }
    rnd=$RANDOM
    bindtest="dyne-tomb-bind-test-$rnd"
    echo $rnd > /media/test.tomb/$bindtest
    rm -f /media/test.tomb/bind-hooks
    echo "$bindtest $bindtest" > /media/test.tomb/bind-hooks
    touch $HOME/$bindtest
    tt close test
    tt -k /tmp/test.tomb.key --unsafe --tomb-pwd ${dummypass} open /tmp/test.tomb
    rnd2=`cat $HOME/$bindtest`
    if [ "$rnd" = "$rnd2" ]; then
	    notice "Bind hook on file matches"
	    results+=(bind SUCCESS)
	    tt list test
    else
	    error "Bind hook on file reports incongruence"
    fi
    rm -f "/media/test.tomb/$bindtest"
    tt close test
    # Remove test file in HOME
    rm -f "$HOME/$bindtest"
}

test-set-key() {

    notice "Testing set key"

    sudo rm -f /tmp/test.tomb.new.key

    tt forge -k /tmp/test.tomb.new.key --force --unsafe --tomb-pwd ${dummypass} --use-urandom

    tt setkey -k /tmp/test.tomb.new.key --unsafe --tomb-pwd ${dummypass} --tomb-old-pwd ${dummypass} /tmp/test.tomb.key /tmp/test.tomb

    tt open -k /tmp/test.tomb.new.key --unsafe --tomb-pwd ${dummypass} /tmp/test.tomb

    [[ $? = 0 ]] && {
        notice "Setkey succesfully swapped tomb key"
        results+=(setkey SUCCESS)
        say "Dump of clear key contents to examine them:"
        print ${dummypass} \
	        | gpg --batch --passphrase-fd 0 --no-tty --no-options -d /tmp/test.tomb.new.key \
	        | hexdump -C
        echo --
        mv /tmp/test.tomb.new.key /tmp/test.tomb.key
        tt close test
    }
}


startloops=(`sudo losetup -a |cut -d: -f1`)

[[ $1 = "source" ]] && { return 0 }

[[ $1 = "" ]] || {
    tt ${=@}
    return $?
}

# isolated function (also called with source)
test-tomb-create

notice "Testing open with wrong password"

tt -k /tmp/test.tomb.key --unsafe --tomb-pwd wrongpassword open /tmp/test.tomb

{ test $? = 0 } || { results+=(badpass SUCCESS) }



notice "Testing open with good password"

tt -k /tmp/test.tomb.key --unsafe --tomb-pwd ${dummypass} open /tmp/test.tomb

{ test $? = 0 } && { results+=(open SUCCESS) }

tt close test

{ test $? = 0 } && { results+=(close SUCCESS) }



notice "Testing changing tomb password"

tt passwd /tmp/test.tomb \
    -k /tmp/test.tomb.key --unsafe --tomb-old-pwd ${dummypass} --tomb-pwd ${dummypassnew}

tt passwd /tmp/test.tomb \
    -k /tmp/test.tomb.key --unsafe --tomb-old-pwd ${dummypassnew} --tomb-pwd ${dummypass}

{ test $? = 0 } && { results+=(passwd SUCCESS) }





notice "Generating content for file integrity test"

tt -k /tmp/test.tomb.key --unsafe --tomb-pwd ${dummypass} open /tmp/test.tomb

tt dig -s 10 /media/test.tomb/datacheck.raw

crc="sha256 /media/test.tomb/datacheck.raw"
echo "$crc" > /media/test.tomb/datacheck.sha

tt --unsafe close test

{ test $RESIZER = 1 } && {
    notice "Testing resize to 30 MiB"
    
    tt --unsafe --tomb-pwd ${dummypass} -k /tmp/test.tomb.key resize /tmp/test.tomb -s 30
    
    { test $? = 0 } && { results+=(resize SUCCESS) }

}

notice "Testing contents integrity"

tt -k /tmp/test.tomb.key --unsafe --tomb-pwd ${dummypass} open /tmp/test.tomb

{ test $? = 0 } && {
    
    crc2="sha256 /media/test.tomb/datacheck.raw"
    
    { test "$crc" = "$crc2" } && { results+=(chksum SUCCESS) }

    tt close test
}






# isolated function
test-bind-hooks









# iso func
test-set-key








{ test $KDF = 1 } && { 
    
    notice "Testing KDF key"
    sudo rm -f /tmp/test.tomb.kdf /tmp/kdf.tomb
    
    tt --unsafe --tomb-pwd ${dummypass} --use-urandom --kdf 1 forge -k /tmp/test.tomb.kdf
    
    { test $? = 0 } && { results+=(kdforge SUCCESS) }
    
    tt passwd --unsafe --tomb-old-pwd ${dummypass} --tomb-pwd ${dummypassnew} --kdf 1 -k /tmp/test.tomb.kdf
    
    { test $? = 0 } && { results+=(kdfpass SUCCESS) }
    
    tt dig -s 10 /tmp/kdf.tomb
    
    tt lock /tmp/kdf.tomb -k /tmp/test.tomb.kdf \
        --ignore-swap --unsafe --tomb-pwd ${dummypassnew} --kdf 1
    
    { test $? = 0 } && { results+=(kdflock SUCCESS) }
    
    tt open /tmp/kdf.tomb -k /tmp/test.tomb.kdf \
        --ignore-swap --unsafe --tomb-pwd ${dummypassnew} --kdf 1
    
    { test $? = 0 } && { results+=(kdfopen SUCCESS) }
    
    ${T} close kdf
    
}

{ test $STEGHIDE = 1 } && {

    notice "Testing steganographic hiding of keys"

    cp -f arditi.jpg /tmp/tomb.jpg
    sudo rm -f /tmp/test.steg.key
    
    tt --unsafe --tomb-pwd ${dummypass} bury -k /tmp/test.tomb.key /tmp/tomb.jpg

    { test $? = 0 } && { results+=(stgin SUCCESS) }

    rm -f /tmp/test.steg.key

    tt --unsafe --tomb-pwd ${dummypass} exhume -k /tmp/test.steg.key /tmp/tomb.jpg

    { test $? = 0 } && { results+=(stgout SUCCESS) }

    tt --unsafe --tomb-pwd ${dummypass} open -k /tmp/test.steg.key /tmp/test.tomb

    { test $? = 0 } && { results+=(stgopen SUCCESS) }

    ${T} close test

    # test piping keys using -k -
    tkey=`tt --unsafe --tomb-pwd ${dummypass} exhume /tmp/tomb.jpg`
    print "$tkey" | tt --unsafe --tomb-pwd ${dummypass} open -k - /tmp/test.tomb
    { test $? = 0 } && { results+=(stgpipe SUCCESS) }

    ${T} close test


    notice "test using open -k image.jpeg"

    tt --unsafe --tomb-pwd ${dummypass} open -k /tmp/tomb.jpg /tmp/test.tomb 
    { test $? = 0 } && { results+=(stgimpl SUCCESS) }

    tt close test
}

{ test $QRENCODE = 1 } && {

    notice "test rendering a QR printable key backup"

    tt engrave -k /tmp/test.tomb.key

    { test $? = 0 } && { results+=(qrenc SUCCESS) }

}

# rm /tmp/test.tomb{,.key} -f || exit 1
    
endloops=(`sudo losetup -a |cut -d: -f1`)

notice "Test results summary"

print "${#startloops} loop devices busy at start"

for t in $tests; do
    echo "$t\t${results[$t]:-FAIL}"
done

for r in ${(v)results}; do
    [[ "$r" == "SUCCESS" ]] || GLOBAL_RESULT=1
done

print "${#endloops} loop devices busy at end"
print "Done. You can remove temporary leftovers from /tmp :"
for i in `find /tmp -name '*tomb*' 2>/dev/null`; do ls -lh $i; done
return $GLOBAL_RESULT