Naming Things with Hashes IETF RFC 6920 specifies both ni and nih schemes, and how they are generated and validated.
This library is composed by methods generate_ni (to generate a ni URI), generate_nih (to generate a nih URI), extract_digest (to get back both the digest and the hashing algorithm) and validate (to validate ni and nih URIs). Both generate_ni, generate_nih and validate understand both file paths and bytearray.
rfc6920.generate_nih(b'Hello World!')
# It returns 'nih:sha-256;7f83-b165-7ff1-fc53-b92d-c181-48a1-d65d-fc2d-4b1f-a3d6-7728-4add-d200-126d-9069;d'
rfc6920.validate('nih:sha-256;7f83-b165-7ff1-fc53-b92d-c181-48a1-d65d-fc2d-4b1f-a3d6-7728-4add-d200-126d-9069;d', b'Hello World!')
# It returns True
rfc6920.validate('nih:sha-256;7f83-b165-7ff1-fc53-b92d-c181-48a1-d65d-fc2d-4b1f-a3d6-7728-4add-d200-126d-9069;e', b'Hello World!')
# It returns False, wrong check digit
rfc6920.validate('nih:sha-256;7f83-b165-7ff1-fc53-b92d-c181-48a1-d65d-fc2d-4b1f-a3d6-7728-4add-d200-126d-9069;d', b'Hello Mundo!')
# It returns False, different digest