About

This is a cryptographic library (mostly made for fun and academic purpose). I try to adhere to standards, and verify the implementation by expected output. Here is some of the resources used:

• For tests: Cryptographic Standards and Guidelines, Examples with Intermediate Values
• AES, NIST FIPS 197 (my implementation is vulnerable to S-box related timing attacks)
• Secure Hashing Algorithm (SHA) NIST FIPS 180-4
• HMAC NIST FIPS 198-1
• CMAC NIST SP 800-38B
• PBKDF2: RFC8018
• Twofish
• ChaCha20: RFC8439 but with 64 bit counter and nonce

Generate the documentation with

cargo doc --no-deps --open

Examples

In the examples diecroy there are a example. It is a small application to encrypt, decrypt and apply error correcting codes. Run with

cargo run --example cryptor --release -- [-h] [-i inputfile] [-o outputfile] [-p password] encrypt|decrypt

Stuff to implement

• Poly1305
• Fortuna using ChaCha20?
• SHA256 fam
• SHA3
• Elliptic curves (Curve25519)
• Digital signatures?
• Fix input vectors and salts
• CMAC
• Twofish
• Message padding like SHA512 for CBC
• CBC in place on mutable vector

Future problems that require future solutions

• Input vector be removed from aes cipher and inv_cipher.

• Encrypt and decrypt not aligned with 16 bytes.

• IV in encrypt and decrypt iterator.

• cipher block chaining in encrypt and decrypt iterator.

• cipher text stealing in encrypt and decrypt iterator.

• Incorporate the code of Frixxie

BUGS

• Encrypt and decrypt stream is buggy when encrypting less than a single block. (CTS should not be activated, but i think maybe it is?)