Hello
I hope this is the right place to ask this kind of question, apologizes in
advance if I should send my question somewhere else.
I am new to libssh and trying to use it properly in a windows application that
needs to do sftp.
I have followed samples found online (mostly in the tutorial section of libssh
website) and came up with the following piece of code:
ssh_session my_ssh_session = ssh_new();
if (my_ssh_session == NULL) {
exit(-1);
}
ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST,
serverIP.GetBuffer());
ssh_options_set(my_ssh_session, SSH_OPTIONS_LOG_VERBOSITY,
&verbosity);
ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
ssh_options_set(my_ssh_session, SSH_OPTIONS_USER,
User.GetBuffer());
rc = ssh_connect(my_ssh_session);
if (rc != SSH_OK)
{
ssh_free(my_ssh_session);
exit(-1);
}
if (verify_knownhost(my_ssh_session) < 0)
{
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
exit(-1);
}
rc = ssh_userauth_publickey_auto(my_ssh_session, NULL, NULL);
if (rc != SSH_AUTH_SUCCESS)
{
ssh_key pubKey, privKey;
rc =
ssh_pki_import_pubkey_file("C:\\Users\\XXXX\\.ssh\\key.pub", &pubKey);
if (rc == SSH_OK) {
rc =
ssh_userauth_try_publickey(my_ssh_session, NULL, pubKey);
if (rc == SSH_AUTH_SUCCESS) {
rc =
ssh_pki_import_privkey_file("C:\\Users\\XXXX\\.ssh\\key", NULL, NULL, NULL,
&privKey);
if (rc ==
SSH_OK) {
rc = ssh_userauth_publickey(my_ssh_session, NULL, privKey);
ssh_key_free(privKey);
}
}
ssh_key_free(pubKey);
}
if (!authenticated) {
rc =
ssh_userauth_password(my_ssh_session, NULL, password.GetBuffer());
if (rc != SSH_AUTH_SUCCESS)
{
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
exit(-1);
}
}
}
The key pair have been generated with puttygen tool, and I understand that
putty uses a different format to store the private key, so I have used the
Conversion / Export OpenSSH key (force new file format) option to have the
private key in standard format.
The public key has been added to the authorized_key file on the remote server
and the manual connection using putty works fine, using a password, or using
the putty key agent (pageant) without having to enter a password.
In my code above, the call to the function ssh_pki_import_privkey_file always
return -1. I have tried different key type but I still get the same thing. Also
tried to remove the line (--- BEGIN OPENSSH PRIVATE KEY ----) in the key file
but no luck.
I know that on linux / unix, permission checking on key files are very strict
in .ssh directory and may be a reason for failing to authenticate.
The fact that I am getting SSH_ERROR and not SSH_EOF tells me that it is able
to find the file, so I am thinking it is a file format or a file permission
issue.
I don't know if the same permission checks are done on Windows and if so, what
the permission should be.
The password authentication in the code works fine so I am still able to
connect to the server but I would like to have the key method to work.
If you have any suggestion or tips, that would be greatly appreciated,
Thanks
Eric
