画像ファイルの暗号化

head -n image. ppm>header>header.txt
tail -n +5 image.ppm>body.bin
openssl enc-aes-128-ecb -nosalt -pass pass"ipsiron" -in body.bin -out body.ecb.bin
cat header.txt body.ecb.bin> image.ecb.ppm
openssl enc -aes-28 cbc -nosalt -pass pass "ipsiron" -in body.bin -out body.cbc bin
cat header.txt body.cnc.bin > image.cbc.ppm