fisheye

• Description: Turn an arbitrary file into an 8-bit grayscale encrypted PNG image
• Encryption: Threefish 1024-bit key in CTR mode
• Authentication: HMAC SHA3-512
• Key derivation: 42 rounds of PBKDF2 SHA3-512
• Dependencies:
  • C version: libsodium, libgcrypt, and libpng
  • C++ version: crypto++ and libpng
• The C++ version is faster and therefore recommended

Compile:

g++ main.cpp lz4.c -O3 -o fisheye -lpng -lcryptopp -Wall -Wextra -Wpedantic
gcc main.c tf1024.c tf_fast.c lz4.c -I. -O3 -o fisheye -lm -lsodium -lgcrypt -lpng -Wall -Wpedantic -Wextra

Encrypt:

./fisheye -p "password" -h "HMAC key" -i a.file.name -o test.e.png -e

Decrypt:

./fisheye -p "password" -h "HMAC key" -i test.e.png -o a.file.name -d