Trouble using authPubkey authentication (wodSFTP / wodSFTP.NET / wodSFTPdll)

Hi, I'm developing a simple program in vc that has to extract a private key from a db and then do an ssh to an host using that key.

When I connect using password authentication everything works fine, but when I to use key auth the connect() method returns me a strange value (-2146798272).
I can't figure out what I'm doing wrong, can you help me ?

Thanks.

Damiano

Here's a sample of my code

m_SSH2->put_Blocking(VARIANT_TRUE);
m_SSH2->put_Hostname(ip);
m_SSH2->put_Login(user);
m_SSH2->put_Protocol(protocol);
m_SSH2->put_Authentication(authPubkey);
m_SSH2->put_Port(2222);

m_SSH2->put_Prompt(vExpectedPrompt);

//gets the private key from db
//row[1] holds is a pointer (char *) to the private key data
row= get_private_key();

numchar = (long) (strlen(row[1]));
Bufsize = (long) (sizeof(char *) * numchar);

SAFEARRAY *psa;
SAFEARRAYBOUND rgsabound[1];
char HUGEP *data;

rgsabound[0].lLbound=0;
rgsabound[0].cElements=Bufsize;

psa = SafeArrayCreate(VT_UI1,1,rgsabound);
if (!psa)
return WSA_NOT_ENOUGH_MEMORY;

SafeArrayAccessData(psa, (void HUGEP* FAR*)&data);

memcpy(data,row[1], Bufsize);
SafeArrayUnaccessData(psa);

VARIANT var;

var.vt =VT_ARRAY | VT_UI1;
var.parray=psa;

m_SSH2->put_PrivateKey(var);
ConnectRetCode = m_SSH2->Connect();
//Here ConnectRetCode is - 2146798272

Damiano,

error 2146798272 is in HEX 800A7540. Looking at last word HEX 7540 and convert it back to DEC is 30016 = Invalid login/password error.

So, let's see why you get this error. Did you upload public key to the server?

The key I'm using to connect with the server is taken from the server.
on the server I created a pair of private/public key using ssh-keygen -t dsa.
Then I inserted the private key into the db.
If I copy the private key on another linux system I can do a login with that key, so I think the system is ok.

I think it's a problem related to the conversion of the key in the code, so I will try to assign it directly in an array of chars.
Thanks for the support, I hope to write soon about my successful connection with a private key ! :)

Damiano,

error 2146798272 is in HEX 800A7540. Looking at last word HEX 7540 and convert it back to DEC is 30016 = Invalid login/password error.

So, let's see why you get this error. Did you upload public key to the server?

Damiano,

you said if you copy public key to another linux it works ok? With your current code? Then it could be server issue, not conversion issue?

Unfortunately no, if i copy my private key on another linux system and then I do an ssh from the command line (i.e ssh -i ./private_key -p 2222 host) it works.
My program doesn't work, so i think it's a string manipulation problem
I made some test but I saw that the text in the private key file is right, could it be an error in the variant conversion ?

Damiano,

you said if you copy public key to another linux it works ok? With your current code? Then it could be server issue, not conversion issue?

Damiano,

ok, I see. Do you have some spare key you could send to me, including your code? I don't have the database like you, but we could use some local file for storing/retrieving, right?

If I can duplicate the issue I will be able to give you much better explanation what could be going on.

Please send it to techsupport@weonlydo.com

Yes, I can send you some keys.
I cannot give you the access to the server (it's a testing server, we are using it as a test environment).
I've tried with a rsa and a dsa key.
I am sending you the 2 pairs and the source code.

Thanks

Damiano,

ok, I see. Do you have some spare key you could send to me, including your code? I don't have the database like you, but we could use some local file for storing/retrieving, right?

If I can duplicate the issue I will be able to give you much better explanation what could be going on.

Please send it to techsupport@weonlydo.com

I am having a problem similar to the one already mentioned in this thread.

I use wodSFTP and wodSSH. I can properly transfer files between my program and a remote server using authPubkey and wodSFTP. I however cannot connect to the same remote sever using the same private key and settings with wodSSH.

with wodSSH, connect returns -2146798272 (explained in this thread). When I run the remote sshd in debug mode, it seems that wodSSH does not attempt to authenticate with my private key the same way the wodSFTP does.

wodSFTP:
[code]
debug1: userauth-request for user xyz service ssh-connection method none
debug1: userauth-request for user xyz service ssh-connection method publickey
[/code]

wodSSH:
[code]
debug1: userauth-request for user xyz service ssh-connection method none
[/code]

What can cause this type of situation? I am using the same private key for both the ssh and sftp code.

A.,

are you sure this is same error as discussed above?

Can you send your keys to techsupport@weonlydo.com so we can try this out and duplicate the behavior?

And, very important - do you use latest versions of both products?