OpenBSD_malloc_Linux.c: The OpenBSD malloc implementation, ported to Linux. Used only when --enable-openbsd-malloc is passed to the configure script. strlcat.c strlcpy.c Implementations of strlcat and strlcpy, the more sane replacements for strcat and strcpy. These are nonstandard, and some libc implementations refuse to add them for religious reasons. eventdns.[ch] A fork of Libevent's DNS implementation, used by Tor when Libevent 2.0 or later is not available. Once Libevent 2.0 is required, we should throw this away; it has diverged from evdns.[ch], and is no longer easily mergeable. ht.h An implementation of a hash table in the style of Niels Provos's tree.h. Shared with Libevent. tinytest.[ch] tinytest_demos.c tinytest_macros.h A unit testing framework. https://github.com/nmathewson/tinytest tor_queue.h A copy of sys/queue.h from OpenBSD. We keep our own copy rather than using sys/queue.h, since some platforms don't have a sys/queue.h, and the ones that do have diverged in incompatible ways. (CIRCLEQ or no CIRCLEQ? SIMPLQ or STAILQ?) We also rename the identifiers with a TOR_ prefix to avoid conflicts with the system headers. curve25519_donna/*.c A copy of Adam Langley's curve25519-donna mostly-portable implementations of curve25519. csiphash.c siphash.h Marek Majkowski's implementation of siphash 2-4, a secure keyed hash algorithm to avoid collision-based DoS attacks against hash tables. trunnel/*.[ch] Headers and runtime code for Trunnel, a system for generating code to encode and decode binary formats. ed25519/ref10/* Daniel Bernsten's portable ref10 implementation of ed25519. Public domain. ed25519/donna/* Andrew Moon's semi-portable ed25519-donna implementation of ed25519. Public domain. keccak-tiny/ David Leon Gil's portable Keccak implementation. CC0. readpassphrase.[ch] Portable readpassphrase implementation from OpenSSH portable, version 6.8p1.