ssh_user_auth_none Permission denied

[Sruthi Mohan (RBEI/EIA1)]

Dear All,

I am trying to connect to the server using ssh.
I get  Access denied for ssh_user_auth_none. Authentication that can continue 
Public key
As per ssh_userauth_list list PUBLIC KEY authentication is valid

Post that ssh_userauth_try_publickey and ssh_pki_import_pubkey_file also fails. 
Kindly let me know the possible reason failure


Attached code below

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    ssh_session my_ssh_session;
    int verbosity = SSH_LOG_PROTOCOL;
    int port = 155;
    my_ssh_session = ssh_new();
    if (my_ssh_session == NULL)
    {
        exit(-1);
    }
    ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, myip);
    ssh_options_set(my_ssh_session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
    ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);

   int rc = ssh_connect(my_ssh_session);
    if (rc != SSH_OK)
    {
    qDebug()<<"Error connecting to host:"<<ssh_get_error(my_ssh_session);
      exit(-1);
    }
    rc=verify_knownhost(my_ssh_session);
    rc = ssh_userauth_none(my_ssh_session, NULL);
    if (rc != SSH_AUTH_SUCCESS) {
       qDebug()<<"Error connecting to localhost: 
%s\n"<<ssh_get_error(my_ssh_session);
       // return rc;
    }
    int method = ssh_userauth_list(my_ssh_session, NULL);

    if (method & SSH_AUTH_METHOD_NONE)
    {
        qDebug()<<"Authenticate None";
    }
    if (method & SSH_AUTH_METHOD_PUBLICKEY)
    {
        qDebug()<<"Authenticate pubkey";
    }
    if (method & SSH_AUTH_METHOD_INTERACTIVE)
    {
        qDebug()<<"Authenticate keyboard";
    }
    if (method & SSH_AUTH_METHOD_PASSWORD)
    {
        qDebug()<<"Authenticate password";
    }

if (ssh_pki_import_pubkey_file(PublickeyFile.toStdString().c_str(), &pubkey) != 
SSH_OK)
    {
        qDebug()<<"Failed to import the key";
    }
    if(ssh_userauth_try_publickey(my_ssh_session,"S3DDM",pubkey)==SSH_ERROR)
    {
        qDebug()<<"Failed to import the key";
    }


    ssh_free(my_ssh_session);
    ssh_disconnect(my_ssh_session);

    return a.exec();
}


Best regards

Sruthi Mohan
RBEI/EIA1

Tel. +91(80)6783-7826