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server: Support for extension negotiation

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This includes intercepting the  ext-info-c  string from
the client kex proposal, configuring the server to allow using
this extension and sending the SSH_MSG_EXT_INFO packet back
to the client after the new keys are in use.

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Jakub Jelen
2018-07-03 16:16:25 +02:00
committed by Andreas Schneider
parent 60ad7ee15d
commit 6fa5e8adb0
3 changed files with 58 additions and 2 deletions
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include/libssh/session.h
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@@ -90,6 +90,7 @@ enum ssh_pending_call_e {
/* server-sig-algs extension */
#define SSH_EXT_SIG_RSA_SHA256 0x01
#define SSH_EXT_SIG_RSA_SHA512 0x02
#define SSH_EXT_ALL SSH_EXT_SIG_RSA_SHA256 | SSH_EXT_SIG_RSA_SHA512
/* members that are common to ssh_session and ssh_bind */
struct ssh_common_struct {