SWI-Prolog -- crypto_data

Documentation
- Reference manual
- Packages
  - SWI-Prolog SSL Interface
    - library(crypto): Cryptography and authentication library
      - Hashes
        
        Hashing incrementally
        
        crypto_context_new/2
        
        crypto_data_context/3
        
        crypto_context_hash/2
        
        crypto_open_hash_stream/3
        
        crypto_stream_hash/2

Availability::- use_module(library(crypto)).(can be autoloaded)

[det]crypto_data_context(+Data, +Context0, -Context)

Context0 is an existing computation context, and Context is the new context after hashing Data in addition to the previously hashed data. Context0 may be produced by a prior invocation of either crypto_context_new/2 or crypto_data_context/3 itself.

This predicate allows a hash to be computed in chunks, which may be important while working with Metalink (RFC 5854), BitTorrent or similar technologies, or simply with big files.