SHA-512 class

(language C++.)

This is an implementation of the popular SHA-512 hash function. Written in a convenient class form for speedy deployment. The digest is stored in an array of 8 unsigned "long long" integers within the class. For convenient retrieval of the digest, use member function `GetDigest()`

The following four member functions are set public for developers who want to deploy this class.

SHAtwoLinkDBs()
HashText()
HashData()
GetDigest()
SetTotalRounds()

SHAtwoLinkDBs()
You must provide your class name to this macro. This will copy initialization vectors into your specific class. Allows declaration of multiple instances.

HashText()
This expects a c-style string as an argument. Your string must fit in memory, and be less than 4.2 GB.

HashData()
Expects an array of unsigned bytes and a specified size. Your data must fit in memory, and be less than 4.2 GB.

GetDigest()
The digest will be copied into your array.