telehash tools library in c

This is a full implementation of telehash in portable c for embedded systems, designed to be source that can be copied into other projects.

Building

Just run make to build a libtelehash.a and some utility apps into bin/*. Use make test to run a full test suite, and make static to generate a current standalone telehash.c and telehash.h.

Use npm install to automatically install optional crypto dependencies (libsodium and libtomcrypt).

Library Interface

The codebase is a set of components that can be used to create/integrate telehash services, here's a rough layout, see src/ and include/ for details.

• e3x_*: all of the crypto handling
• mesh_* and link_*: higher level easy interfaces for apps
• ext_*: various useful extensions to a mesh to support built-in channels
• pipe_* and net_*: transport and networking handling
• util_* and libs: portable utilities and bundled libs

There's many examples of usage in the bundled tests.

Memory Notes

Most of the codebase uses lob_t as the primary data type since it handles JSON and binary for all packets.

The following methods return generated lobs (you must free):

• e3x_channel_receiving
• e3x_channel_sending
• e3x_channel_oob
• e3x_channel_packet
• e3x_self_decrypt
• e3x_exchange_message
• e3x_exchange_handshake
• e3x_exchange_receive
• link_handshakes
• link_sync
• link_resync
• mesh_on_open (callback must return or free the given lob)

And these methods consume lobs (will be free'd):

• e3x_channel_receive
• e3x_channel_send
• link_handshake
• link_receive
• link_receive_handshake
• link_send
• link_flush
• link_direct
• mesh_handshake
• mesh_handshakes
• mesh_receive
• mesh_receive_handshake