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Subject: bad client public DH value

bad client public DH value

From: Barry Fawthrop <barryf_at_ttienterprises.org>
Date: Tue, 22 May 2012 13:48:35 -0400

Hi All

Trying to create an SSH client using the LibSSH2-1.4.1 code
I'm getting a failure

The Server has
============
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes256-cbc,aes192-cbc,aes128-cbc,rijndael-cbc_at_lysator.liu.se,arcfour128,arcfour,blowfish-cbc,cast128-cbc,3des-cbc,aes256-ctr,aes192-ctr,aes128-ctr
debug2: kex_parse_kexinit: aes256-cbc,aes192-cbc,aes128-cbc,rijndael-cbc_at_lysator.liu.se,arcfour128,arcfour,blowfish-cbc,cast128-cbc,3des-cbc,aes256-ctr,aes192-ctr,aes128-ctr
debug2: kex_parse_kexinit: hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96,hmac-ripemd160,hmac-ripemd160_at_openssh.com
debug2: kex_parse_kexinit: hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96,hmac-ripemd160,hmac-ripemd160_at_openssh.com
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-sha1
debug1: kex: client->server aes256-cbc hmac-sha1 none
debug2: mac_setup: found hmac-sha1
debug1: kex: server->client aes256-cbc hmac-sha1 none
debug2: dh_gen_key: priv key bits set: 269/512
debug2: bits set: 1047/2048
debug1: expecting SSH2_MSG_KEXDH_INIT
invalid public DH value: <= 1
Disconnecting: bad client public DH value

The Client Side has
================
:: [libssh2] 0.410000 Key Ex: Initiating Diffie-Hellman Group14 Key Exchange
:: [libssh2] 0.410000 Key Ex: Sending KEX packet 30
:: [libssh2] 0.410000 Socket: Sent 16/16 bytes at 0x61eef18
:: [libssh2] 0.410000 Transport: Looking for packet of type: 31
:: [libssh2] 0.434000 Socket: Recved 48/16384 bytes to 0x61eaef0+0
:: [libssh2] 0.434000 Transport: Packet type 1 received, length=39
:: [libssh2] 0.434000 Transport: Disconnect(2): (null)((null))
:: [libssh2] 0.434000 Failure Event: -13 - socket disconnect
:: [libssh2] 0.434000 Failure Event: -9 - Timed out waiting for KEX reply
:: [libssh2] 0.434000 Failure Event: -8 - Unrecoverable error exchanging keys
:: [libssh2] 0.434000 Failure Event: -8 - Unable to exchange encryption keys

Any Help ! !
What could be causing the problem ?

Thanks in advance

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Received on 2012-05-22

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