Absolutely awesome for paranoid pair!

OpenBSD 6.0 x86_64 i386 sndio

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• Ultra lightweight, tiny, robust and extremely secure Voice Over TLS sitting on top of libtls with added Blowfish encryption for OpenBSD and sndio only.

rcctl sndiod start (please refer to OpenBSD FAQ: Multimedia for configuring audio devices).

usage: smoke [-p playback device] [-c capture device] [-x key.pem] [-y cert.pem] [-S server] [-P port]

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Device format (playback / capture):

snd/0       First playback device exposed by sndiod(8).
rsnd/0      First capture device.

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key.pem     PEM file containing a private key.
cert.pem    PEM file containing a certificate.

server      Server IP Address (IPv4 only)
port        Port number

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Generate PEM files (key and cert) with generatePEM.sh (optional)
You will be asked for a password each time you are trying to communicate, both users require the same password.

smoke> ./smoke 
Blowfish Password: 
Enter PEM pass phrase:
[+] Waiting for valid connection
[+] Authentication (x.x.x.x)
[+] Starting conversation

# Single Interface (both playback and capture frames will be transported over the same interface)

# (1) smoke -P 5150
# (4) smoke -S 10.0.0.2 -P 5151

# (2) smoke -S 10.0.0.1 -P 5150
# (3) smoke -P 5151

# Multiple Interface (playback and capture frames will be transported over different interfaces)

Both interfaces can accept different PEM files and a different password making it extremely secure.

## Server (111.5.5.5 & 222.5.5.5)

$ (1) smoke -P 5150
$ (4) smoke -S 222.6.6.6 -P 5151

## Client (111.6.6.6 & 222.6.6.6)

$ (2) smoke -S 111.5.5.5 -P 5150
$ (3) smoke -P 5151

Extremely more robust, guarding the port with pf(4).

NOTE:

** (1) Alice capture - bind(2), tls_write(3)
** (2) Bob playback - tls_read(3)
** (3) Bob capture - bind(2), tls_write(3)
** (4) Alice playback - tls_read(3)

SHARED LIBRARY DEPENDENCIES:

  /usr/lib/libsndio.so.6.1
  /usr/lib/libpthread.so.22.0
  /usr/lib/libtls.so.11.0
  /usr/lib/libc.so.88.0
  /usr/lib/libcrypto.so.38.0
  /usr/lib/libssl.so.39.0
  /usr/libexec/ld.so

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