currently sign/verify works on message directly, it would be nice if PSS could sign/verify digest directly. This is useful for:
1) for some signing server it only has a digest (without message)
2) message could be very large, for cases when client need request a singing server to sign, it may make more sense for the client to compute digest, then ask server to (PSS) sign the digest
3) openSSL pkeyutl (PSS) sign operation signs with digest only, not the message, it would be nice to work with openSSL more easily
*openSSL command line:
```shell
openssl pkeyutl -pkeyopt rsa_padding_mode:pss -pkeyopt rsa_pss_saltlen:-1 -pkeyopt digest:sha256 -sign -inkey "pri.key" -in hmac.bin > sig.bin
openssl pkeyutl -pkeyopt rsa_padding_mode:pss -pkeyopt rsa_pss_saltlen:-1 -pkeyopt digest:sha256 -verify -inkey "pri.key" -in hmac.bin -sigfile sig.bin
```
Need to use ordinary comments instead of nested comments
because LANGUAGE pragmas were removed otherwise.
Also adds a table of contents. We may have other examples
in the future.
* Cleanup argon c files:
* Remove encoded format and base64 encoder
* Remove verification code
* Remove all variants based simple caller
* Add basic hashing function
* Add a simple KAT test
* Define more things at the haskell level
Fix bug in isProbablyPrime where too many iterations were specified for numbers less than 100
Add clause to isProbablyPrime to use hardcoded values <= 2903
Add check for size in generatePrime
Add size test in generateSafePrime
Require only that top bit is set, instead of top 2
This is the general standard, see e.g. OpenSSL
Add an error for too few bits being supplied to prime generator, and add documentation
Add some documentation and require highest two bits set
Simplify return syntax in generatePrime and generateSafePrime
Switch exponent to bit-shift for small performance boost
