Here is a list of all files with brief descriptions:

[detail level 1234]

include
hasha
internal
config.h
error.h
feature.h
hadefs.h
internal.h
libc.h
opts.h
primitive.h
types.h
ver.h
all.h
blake2.h
blake2b.h	Header file for the BLAKE2b hashing algorithm
blake2b_k.h	Blake2B Constants for Hash Computation
blake2s.h	Header file for the BLAKE2s hashing algorithm
blake2s_k.h	Blake2S Constants for Hash Computation
blake3.h	Header file for the BLAKE3 hashing algorithm
blake3_k.h	Blake3 Constants for Hash Computation
crc.h	Header file for CRC32 checksum calculation
evp.h	Header file for the EVP Hasher abstraction
evpp.h
hasha.h
io.h	Header file for I/O operations related to hashing
keccak.h	Header file for Keccak-based hash functions
keccak_k.h	Keccak Constants for Hash Computation
keccakf1600.h
md5.h	Header file for the MD5 cryptographic hash function
md5_k.h	MD5 Constants for Hash Computation
sha1.h	Header file for the SHA-1 cryptographic hash algorithm
sha1_k.h	SHA-1 Constants for Hash Computation
sha2.h	Header file for SHA-2 cryptographic hash functions
sha2_k.h	SHA-2 Constants for Hash Computation
sha3.h	Header file for SHA3 cryptographic hash functions