Missing hash functions

[newpavlov]

List of "would be nice to have" hash functions:

• BLAKE add blake #46
• BLAKE2X (BLAKE2 XOF, previous issue: Blake2x #83)
• BLAKE2sp and BLAKE2bp (previous issue: Implementations of BLAKE2sp and BLAKE2bp #31)
• cSHAKE
• ParallelHash
• FSB FSB hash function #256
• Grøstl Implemented Grostl #10
• JH JH hash implementation #484
• HAS-160
• KangarooTwelve Add k12 #45
• Kupyna Kupyna: implemented hashing function #621
• MarsupilamiFourteen (section 5, also see Rust and C versions of KangarooTwelve and MarsupilamiFourteen  XKCP/XKCP#54)
• MD2 Added MD2 hash function #7
• MD6
• Poseidon
• Poseidon2
• RIPEMD-128
• Skein Skein hash implementation #483
• Tiger add tiger hash from https://gitlab.com/rawler/tiger #229
• VSH

It can be changed based on discussion.

[adrianbrink]

MD2 explanation
General information from wikipedia

The first link has an example of an implementation in C of MD2. Overall the implementation is around 100 lines of code and hence should be doable for anyone that knows a bit of rust.

[felipeamp]

I am somewhat new to Rust but I believe I can do this. Can I take MD2?

[newpavlov]

Moved Grostl discussion to #8.

[faineance]

I'd like to take a shot at Tiger.

[cseale]

I'll take a shot at MD6

[lilianmoraru]

I think bcrypt is a must-have.

[tarcieri]

bcrypt is a password hashing function. Perhaps those deserve their own toplevel project, as they are functionally different from hash functions (among other things they are PRFs, not hash functions)

[newpavlov]

@lilianmoraru
There is already bcrypt crate, but it needs a bit of work before publishing. And as tarcieri mentioned, bcrypt is better to be placed in the different repo. I was thinking about RustCrypto/kdf and I was planning to work on it after I'll finish with block modes for block ciphers. (bcrypt depends on blowfish after all)

[tarcieri]

nit about "kdf": bcrypt isn't a KDF