age in C.
libcage is standard C99 and only depends on libc. cage and cage-keygen only target POSIX C11.
cage-keygen and cage should produce similar or identical output on happy paths to the Go
implementation, but this is not currently guaranteed. Expect errors to be reported differently.
cage is built upon Monocypher, which has been audited, but cage itself has not.
cage is probably buggy.