Monocypher (https://monocypher.org), 4.0.2, src/monocypher.c and src/monocypher.h, unmodified: monocypher-4.0.2.tar.gz from
https://monocypher.org/download/, SHA-512 bf275d4c53ff94af6cdc723a4e002e9f080f4d1436c86c76bb37870b34807f1d7b32331d8ff8a1aeb369e946f3769021e03e63efac25b82efc5abf54dc084714.
CC0 or 2-clause BSD (LICENCE.md). The online service's keys and encryption (runtime/net/online/crypto.c).
