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security: E2EE and transport correctness (issue #147)
T04: promote security events to warnings — SASL auth failure, TLS
handshake failure, cert-failure details, see-other-host redirect;
DISABLE_TLS, TRUST_TLS and LEGACY_AUTH get a log warning plus a
console notice (REQ-LOG-01, REQ-LOG-02, REQ-AUTH-03)

T05: warn when a session ends up unencrypted without the user having
asked for it; refuse in-band registration on an unencrypted stream;
warn on each HTTP transfer with certificate verification disabled
(REQ-CRY-03, REQ-CFG-01)

T06: pin the update check to https with peer/host verification and no
redirects; strict N.N.N parser for the fetched version, which is
untrusted network input (REQ-VUL-02)

T09: no plaintext logging on failed MUC OMEMO sends; OTR opportunistic
first message passes allow_unencrypted_message(); get_random_string()
draws from a CSPRNG without modulo bias; guard the identity-key length
decrement against unsigned underflow (REQ-CRY-01, REQ-CRY-02,
REQ-CRY-07, REQ-MEM-05)

REQ-VUL-03 and REQ-CRY-09 are already satisfied on master and are
left unchanged.
2026-07-30 10:42:19 +03:00
2016-03-09 12:55:57 +01:00
2025-03-11 12:15:09 +01:00
2022-02-01 15:01:28 +01:00
2025-01-28 16:43:13 +01:00
2021-08-26 00:30:55 +00:00
2019-04-24 01:08:38 +02:00
2025-09-01 16:57:10 +02:00

CProof

Build Status

CProof is a console based XMPP chat client based on Profanity.

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See the Quick Start Guide for information on installing and using CProof.

Project

CProof enables you to communicate with privacy, freedom and comfort. Our open-source chat application delivers secure, end-to-end encrypted messaging (OTR, PGP, OMEMO, OX) built on the trusted XMPP protocol. With a decentralized design, you can connect directly or even host your own server, keeping your data in your hands. Whether you're chatting with friends or collaborating securely, CProof makes private communication simple, reliable, and truly yours.

Installation

Check our installation guide for detailed instructions.

How to contribute

See our Helping Out page for a concise summary of ways to help us.

Review the Contributing Guide and Code Overview pages for advanced technical details.

Getting help

Prior to asking questions, check our User Guide, then check out the FAQ.

If you are still having a problem then search the issue tracker.

As a last resort, feel free to write us on support@jabber.tech or create a new issue depending on what your problem is.

Website

Feel free to visit our website: jabber.space.

You may also check the repository if you like, available on git.jabber.space/devs/profanity.

Plugins

Plugins repository: https://git.jabber.space/devs/cproof-plugins

Description
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Readme 40 MiB
Languages
C 95.2%
Python 1.7%
Makefile 0.9%
M4 0.8%
Shell 0.7%
Other 0.6%