Here is a list of all files with brief descriptions:

aead-masked.h	Masked ASCON-128 encryption algorithm and related family members
aead.h	ASCON-128 encryption algorithm and related family members
ascon-aead-128.c
ascon-aead-128a.c
ascon-aead-80pq.c
ascon-aead-common.c
ascon-aead-common.h
ascon-aead-inc-128.c
ascon-aead-inc-128a.c
ascon-aead-inc-80pq.c
ascon-aead-masked-128.c
ascon-aead-masked-128a.c
ascon-aead-masked-80pq.c
ascon-aead-masked-common.c
ascon-aead-masked-common.h
ascon-c32.c
ascon-c64.c
ascon-clean.c
ascon-direct-xor.c
ascon-hash.c
ascon-hasha.c
ascon-hex.c
ascon-hkdf-common.h
ascon-hkdf.c
ascon-hkdfa.c
ascon-hmac-common.h
ascon-hmac.c
ascon-hmaca.c
ascon-isap-128.c
ascon-isap-128a.c
ascon-isap-80pq.c
ascon-isap-common.h
ascon-kmac.c
ascon-kmaca.c
ascon-masked-backend.h
ascon-masked-config.h	Configures the number of shares to use for masked AEAD modes
ascon-masked-key.c
ascon-masked-state.c
ascon-masked-state.h	Utility functions for operating on masked ASCON states with between 2 and 4 shares
ascon-masked-word-c32.c
ascon-masked-word-c64.c
ascon-masked-word-direct.c
ascon-masked-word.h	Utility functions for operating on masked words
ascon-pbkdf2-hmac.c
ascon-pbkdf2.c
ascon-prf.c
ascon-prng.c
ascon-random.c
ascon-select-backend.h
ascon-select-trng.h
ascon-siv-128.c
ascon-siv-128a.c
ascon-siv-80pq.c
ascon-sliced32.c
ascon-sliced32.h
ascon-sliced64.c
ascon-trng-dev-random.c
ascon-trng-due.c
ascon-trng-esp.c
ascon-trng-mixer.c
ascon-trng-none.c
ascon-trng-stm32.c
ascon-trng-stm32.h
ascon-trng-windows.c
ascon-trng-zephyr.c
ascon-trng.h	Access to the system's random number source
ascon-util-snp.h
ascon-util.h
ascon-version.c
ascon-x2-c32.c
ascon-x2-c64.c
ascon-x3-c32.c
ascon-x3-c64.c
ascon-x4-c32.c
ascon-x4-c64.c
ascon-xof-internal.h
ascon-xof.c
ascon-xofa.c
ASCON.h
hash.h	ASCON-HASH and ASCON-HASHA hash algorithms
hkdf.h	HMAC-based key derivation function based on ASCON-HMAC
hmac.h	Hashed Message Authentication Code (HMAC) based on ASCON-HASH
isap.h	ISAP authenticated encryption algorithm for ASCON
kmac.h	Keyed Message Authentication Code (KMAC) based on ASCON-XOF
masking.h	Definitions to support masked ASCON ciphers
pbkdf2.h	Password-based key derivation function based on ASCON
permutation.h	Direct access to the ASCON permutation primitive
prf.h	ASCON-Prf, ASCON-PrfShort, and ASCON-Mac algorithms
random.h	Pseudorandom number generator (PRNG) built around ASCON
siv.h	SIV encryption primitives built around the ASCON permutation
snippets.c
utility.h	System utilities of use to applications that use ASCON
xof.h	ASCON-XOF and ASCON-XOFA extensible output functions (XOF's)