RE: ssh_userauth_none crashes

["Sruthi Mohan (RBEI/EIA1)" <Sruthi.Mohan@xxxxxxxxxxxx>]

[2015/10/19 12:17:57.004000, 2] ssh_connect: libssh 0.7.0 (c) 2003-2014 Aris Adamantiadis, Andreas Schneider, and libssh contributors. Distributed under the LGPL, please refer to COPYING file for information about your rights, using threading threads_noop
[2015/10/19 12:18:01.098046, 3] getai: host 10.164.125.76 matches an IP address
[2015/10/19 12:18:01.156075, 2] ssh_socket_connect: Nonblocking connection socket: 716
[2015/10/19 12:18:01.156075, 2] ssh_connect: Socket connecting, now waiting for the callbacks to work
[2015/10/19 12:18:01.156075, 3] ssh_connect: Actual timeout : 10000
[2015/10/19 12:18:01.159076, 3] ssh_socket_pollcallback: Received POLLOUT in connecting state
[2015/10/19 12:18:01.159076, 1] socket_callback_connected: Socket connection callback: 1 (0)
[2015/10/19 12:18:01.172083, 3] callback_receive_banner: Received banner: SSH-2.0-dropbear_0.51
[2015/10/19 12:18:01.172083, 1] ssh_client_connection_callback: SSH server banner: SSH-2.0-dropbear_0.51
[2015/10/19 12:18:01.172083, 1] ssh_analyze_banner: Analyzing banner: SSH-2.0-dropbear_0.51
[2015/10/19 12:18:01.172083, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[2015/10/19 12:18:01.174084, 3] ssh_packet_socket_callback: packet: read type 20 [len=356,padding=10,comp=345,payload=345]
[2015/10/19 12:18:01.174084, 3] ssh_packet_process: Dispatching handler for packet type 20
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: kex algos: diffie-hellman-group1-sha1
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: server host key algo: ssh-rsa
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: encryption client->server: aes128-cbc,3des-cbc,aes256-cbc,twofish256-cbc,twofish-cbc,twofish128-cbc,blowfish-cbc
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: encryption server->client: aes128-cbc,3des-cbc,aes256-cbc,twofish256-cbc,twofish-cbc,twofish128-cbc,blowfish-cbc
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: mac algo client->server: hmac-sha1-96,hmac-sha1,hmac-md5
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: mac algo server->client: hmac-sha1-96,hmac-sha1,hmac-md5
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: compression algo client->server: zlib,none
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: compression algo server->client: zlib,none
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: languages client->server:
[2015/10/19 12:18:01.174084, 4] ssh_list_kex: languages server->client:
[2015/10/19 12:18:02.403698, 3] ssh_knownhosts_algorithms: server 10.164.125.76:155 has ssh-rsa in known_hosts
[2015/10/19 12:18:02.403698, 3] ssh_client_select_hostkeys: Changing host key method to "ssh-rsa"
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: kex algos: diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: server host key algo: ssh-rsa
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: encryption client->server: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,blowfish-cbc,3des-cbc
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: encryption server->client: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,blowfish-cbc,3des-cbc
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: mac algo client->server: hmac-sha1,hmac-sha2-256,hmac-sha2-512
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: mac algo server->client: hmac-sha1,hmac-sha2-256,hmac-sha2-512
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: compression algo client->server: none
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: compression algo server->client: none
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: languages client->server:
[2015/10/19 12:18:02.403698, 4] ssh_list_kex: languages server->client:
[2015/10/19 12:18:02.403698, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[2015/10/19 12:18:02.403698, 3] packet_send2: packet: wrote [len=388,padding=8,comp=379,payload=379]
[2015/10/19 12:18:02.403698, 3] packet_send2: packet: wrote [len=140,padding=5,comp=134,payload=134]
[2015/10/19 12:18:02.403698, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[20
15/10/19 12:18:02.688841, 3] ssh_packet
connected to host
0x26a39980
HEAP:
Heap block at 26A4D638 modified at 26A4D6F8 past requested size of b8


The logs seem fine to me.

Best regards

Sruthi Mohan
RBEI/EIA1

Tel. +91(80)6783-7826

From: Yang Yubo [mailto:yang@xxxxxxxxxxxx]
Sent: Monday, October 19, 2015 11:30 AM
To: libssh@xxxxxxxxxx
Subject: Re: ssh_userauth_none crashes

Do you have any logs printed by libssh? If you don’t have, use this line to enable logging:

ssh_options_set(session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);

Set verbosity to SSH_LOG_FUNCTIONS will reals very detailed info that may provide clues.

BR,

Yang

On Oct 19, 2015, at 13:39, Sruthi Mohan (RBEI/EIA1) <Sruthi.Mohan@xxxxxxxxxxxx<mailto:Sruthi.Mohan@xxxxxxxxxxxx>> wrote:

HI,
Thanks Yang
I tried doing ssh_init() and It returns success.
The problem still persists.
Checked mySshSession before ssh_userauth_none  .it is still valid.

The device perfectly logs in with putty.
Could it be something to do with device permissions? The same code worked earlier. I don’t remember changing the code, Now its giving issues.
It would be great If somebody can help.

Sample code below:
ssh_init();
    ssh_options_set(mySshSession, SSH_OPTIONS_HOST, IPAddress.toStdString().c_str());
    ssh_options_set(mySshSession, SSH_OPTIONS_PORT, &port);
    ssh_options_set(mySshSession, SSH_OPTIONS_USER, User.toStdString().c_str());

    rc = ssh_connect(mySshSession);
    if (rc==SSH_OK)
    {
int rc =ssh_userauth_none(mySshSession, NULL);
    if (ssh_pki_import_pubkey_file(PublickeyFile.toStdString().c_str(), &pubkey) != SSH_OK) {
        qDebug()<<"Failed to import the key";
        return DDM_ERR;
    }
    }
    }


Best regards

Sruthi Mohan
RBEI/EIA1

Tel. +91(80)6783-7826


From: Yang Yubo [mailto:yang@xxxxxxxxxxxx]
Sent: Sunday, October 18, 2015 7:54 AM
To: libssh@xxxxxxxxxx<mailto:libssh@xxxxxxxxxx>
Subject: Re: ssh_userauth_none crashes

Did you called ssh_init() function to init libssh library?

/**
 * @brief Initialize global cryptographic data structures.
 *
 * This function should only be called once, at the beginning of the program, in
 * the main thread. It may be omitted if your program is not multithreaded.
 *
 * @returns             0 on success, -1 if an error occured.
 */
int ssh_init(void);

BR,

Yang

On Oct 18, 2015, at 10:06, Sruthi Mohan (RBEI/EIA1) <Sruthi.Mohan@xxxxxxxxxxxx<mailto:Sruthi.Mohan@xxxxxxxxxxxx>> wrote:

HI,

Attached files for SSH,
Could be hempful if you could check

From: Yang Yubo [mailto:yang@xxxxxxxxxxxx]
Sent: Friday, October 16, 2015 6:43 PM
To: libssh@xxxxxxxxxx<mailto:libssh@xxxxxxxxxx>
Subject: Re: ssh_userauth_none crashes

Hi Sruthi,

I use libssh in one of my application, didn’t ever encounter such ssh_userauth_none crash error.

It looks like some mySshSession was released or point to another memory address.

I think it would be better if you could paste full example code that can reproduce the issue.

Best

Yang

On Oct 16, 2015, at 18:59, Sruthi Mohan (RBEI/EIA1) <Sruthi.Mohan@xxxxxxxxxxxx<mailto:Sruthi.Mohan@xxxxxxxxxxxx>> wrote:

Dear sir,
I am using libssh 0.7
I have followed the following steps,
ssh_connect(mySshSession);=succesful

Known host verification ==successful

ssh_userauth_none(mySshSession, NULL);

ssh_userauth_none crashes with the error
Heap block at 27415180 modified at 27415240 past requested size of b8.

Any help would be appreciated



Best regards

Sruthi Mohan
RBEI/EIA1

Tel. +91(80)6783-7826

<myipconnect.cpp><myipconnect.h><datatypes.h>