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mod_saslauth, mod_c2s: Disable tls-server-end-point channel binding by default This channel binding method is now enabled when a hash is manually set in the config, or it attempts to discover the hash automatically if the value is the special string "auto". A related change to mod_c2s prevents complicated certificate lookups in the client connection hot path - this work now happens only when this channel binding method is used. I'm not aware of anything else that uses ssl_cfg (vs ssl_ctx). Rationale for disabling by default: - Minor performance impact in automatic cert detection - This method is weak against a leaked/stolen private key (other methods such as 'tls-exporter' would not be compromised in such a case) Rationale for keeping the implementation: - For some deployments, this may be the only method available (e.g. due to TLS offloading in another process/server).

-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

-- COMPAT: Only for external pre-0.9 modules

local hashes = require "prosody.util.hashes"

return {
	md5 = hashes.hmac_md5,
	sha1 = hashes.hmac_sha1,
	sha224 = hashes.hmac_sha224,
	sha256 = hashes.hmac_sha256,
	sha384 = hashes.hmac_sha384,
	sha512 = hashes.hmac_sha512,
	blake2s256 = hashes.hmac_blake2s256,
	blake2b512 = hashes.hmac_blake2b512,
};