openssl enc -aes-128-cbc -e -in drzewo.bmp -out drzewocbc.bmp -K 00112233445566778889aabbccddeeff -iv 0102030405060708
openssl enc -aes-128-cbc -e -in tekst.bmp -out tekstcbc.bmp -K 00112233445566778889aabbccddeeff -iv 0102030405060708
openssl enc -aes-128-ecb -e -in drzewo.bmp -out drzewoebc.bmp -K 00112233445566778889aabbccddeeff
openssl enc -aes-128-ecb -e -in tekst.bmp -out tekstebc.bmp -K 00112233445566778889aabbccddeeff
head -c 54 drzewo.bmp > header

tail -c +55 drzewocbc.bmp>body
cat header body >drzewocbc.bmp
rm -rf body

tail -c +55 drzewoecb.bmp>body
cat header body >drzewoecb.bmp
rm -rf body


rm -rf header
tail -c 54 tekst.bmp> header
tail -c +55 tekstecb.bmp>body
cat header body >tekstcbc.bmp
rm -rf body


tail -c +55 tekstcbc.bmp>body
cat header body >tekstcbc.bmp
rm -rf body