Mercurial > dropbear
view agentfwd.h @ 1855:35d504d59c05
Implement server-side support for sk-ecdsa U2F-backed keys (#142)
* Implement server-side support for sk-ecdsa U2F-backed keys
* Fix out-of-bounds read on normal ecdsa-sha2-[identifier] keys
* Fix one more potential out-of-bounds read
* Check if nistp256 curve is used in sk-ecdsa-sha2- key
It's the only allowed curve per PROTOCOL.u2f specification
* Implement server-side support for sk-ed25519 FIDO2-backed keys
* Keys with type sk-* make no sense as host keys, so they should be
disabled
* fix typo
* Make sk-ecdsa call buf_ecdsa_verify
This reduces code duplication, the SK code just handles the
different message format.
* Reduce sk specific code
The application id can be stored in signkey, then we don't need
to call sk-specific functions from svr-authpubkey
* Remove debugging output, which causes compilation errors with DEBUG_TRACE disabled
* Proper cleanup of sk_app
Co-authored-by: Matt Johnston <[email protected]>
author | egor-duda <egor-duda@users.noreply.github.com> |
---|---|
date | Sat, 22 Jan 2022 16:53:04 +0300 |
parents | a53e7d2d60be |
children |
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/* * Dropbear - a SSH2 server * * Copyright (c) 2002,2003 Matt Johnston * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef DROPBEAR_AGENTFWD_H_ #define DROPBEAR_AGENTFWD_H_ #include "includes.h" #include "chansession.h" #include "channel.h" #include "auth.h" #include "list.h" #if DROPBEAR_CLI_AGENTFWD /* From OpenSSH authfd.h */ #define SSH_AGENT_RSA_SHA2_256 0x02 /* An agent reply can be reasonably large, as it can * contain a list of all public keys held by the agent. * 10000 is arbitrary */ #define MAX_AGENT_REPLY 10000 /* client functions */ void cli_load_agent_keys(m_list * ret_list); void agent_buf_sign(buffer *sigblob, sign_key *key, const buffer *data_buf, enum signature_type type); void cli_setup_agent(const struct Channel *channel); #ifdef __hpux #define seteuid(a) setresuid(-1, (a), -1) #define setegid(a) setresgid(-1, (a), -1) #endif extern const struct ChanType cli_chan_agent; #endif /* DROPBEAR_CLI_AGENTFWD */ #if DROPBEAR_SVR_AGENTFWD int svr_agentreq(struct ChanSess * chansess); void svr_agentcleanup(struct ChanSess * chansess); void svr_agentset(const struct ChanSess *chansess); #endif /* DROPBEAR_SVR_AGENTFWD */ #endif /* DROPBEAR_AGENTFWD_H_ */