Libssh Auth failed: Access denied. Authentication that can...

Bonsoir tout le monde !!

je suis entrain d'écrire un petit prog en c qui nécessite une connexion ssh.
seulement je suis bloqué à l'authentification utilisateur

voici la sortie du programme

./prog 192.168.3.5
[1] SSH server banner: SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u1
[1] Analyzing banner: SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u1
[1] We are talking to an OpenSSH server version: 6.0 (60000)
[1] SSH_MSG_NEWKEYS sent

[1] Got SSH_MSG_NEWKEYS

Server is up, now authentication
Server known
Password: 
Auth failed: Access denied. Authentication that can continue: publickey,password

Et voilà mon code:

#include <libssh/libssh.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int authHost(ssh_session session){
        int state;
        int hlen; /*hash lenght of key*/
        unsigned char *hash = NULL;
 char answerWriteKnown[0];
 //char const * answerWriteKnown[1];
        //int answerWriteKnown;
 
 state = ssh_is_server_known(session);
        hlen  = ssh_get_pubkey_hash(session, &hash);

        if(hlen < 0){
                return -1;
        }
        switch(state){
                case SSH_SERVER_KNOWN_OK:
                 fprintf(stdout, "Server known\n");
   break;
  case SSH_SERVER_NOT_KNOWN:
   answer: /* goto: retry y/n question for answerWritKnown */  
   fprintf(stderr, "Server not  known, do you want to add this in known file ? (y/n)\n", strerror(errno));
   scanf("%c", &answerWriteKnown);
   if(answerWriteKnown[0] == 'y'){
                                if(ssh_write_knownhost(session) < 0){
     fprintf(stderr, "Error write file : %s\n", strerror(errno));
                                }else {
                                        printf("Write knownhost OK\n");
                                }
   }else if(answerWriteKnown[0] == 'n'){
                                printf("You said no !\n");
   }else{
    goto answer;
   } 
 }
}

int authUser(ssh_session session){
 const char *password;
 int remoteCnx;

 password = getpass("Password: ");
 remoteCnx = ssh_userauth_password(session, NULL, password);
 if(remoteCnx == SSH_AUTH_SUCCESS){
  //fprintf(stderr, "Auth failed: %s\n", ssh_get_error(session));
  printf("USER AUTH OK\n");
  return SSH_AUTH_SUCCESS;
 }else {
  //printf("USER AUTH OK\n");
  fprintf(stderr, "Auth failed: %s\n", ssh_get_error(session));
 }
 return remoteCnx;
}

int main(int argc, char *argv[]){
 ssh_session cnxSsh;
 //int verbosity = SSH_LOG_PROTOCOL;
 int verbosity = SSH_LOG_RARE;
 char user[4] = "node";
 int port = 22;
 int remoteCnx;
 //char *password;

 /* alloc mem ***_new() */
 cnxSsh = ssh_new();
 if (cnxSsh == NULL)
  exit(-1);

 ssh_options_set(cnxSsh, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
 ssh_options_set(cnxSsh, SSH_OPTIONS_USER, &user);
 ssh_options_set(cnxSsh, SSH_OPTIONS_HOST, argv[1]);
 ssh_options_set(cnxSsh, SSH_OPTIONS_PORT, &port);

 remoteCnx = ssh_connect(cnxSsh);
 if (remoteCnx != SSH_OK){
  fprintf(stderr, "cnx error to host : %s\n", argv[1],
   ssh_get_error(cnxSsh));
  exit(-1);
 }else {
  fprintf(stdout, "Server is up, now authentication\n");
 }
 
 /* HOST AUTHENTICATION */
 if(authHost(cnxSsh) < 0){
  ssh_disconnect(cnxSsh);
  ssh_free(cnxSsh);
  fprintf(stderr, "Authentication impossible\n");
  exit(-1);
 }

 /* USER AUTHENTICATION */
 if(authUser(cnxSsh) < 0){
                ssh_disconnect(cnxSsh);
                ssh_free(cnxSsh);
                fprintf(stderr, "Authentication impossible\n");
                exit(-1);
        } 
 
 ssh_disconnect(cnxSsh);
 /* dealloc mem ***_free() */
 ssh_free(cnxSsh); 
}

Je ne trouve pas grand chose sur le sujet, j'ai essayé de m'aider des réponses sur cette même erreur venant du paquet ssh mais rien de concluant, à chaque fois c'est une mauvaise configuration des fichiers.
je continu mes recherches...
(La connexion ssh avec mot de passe fonctionne parfaitement)

Si quelqu'un à un indice :)
Merci d'avance.

PS: Je ne suis pas développeur, seulement amateur :)
:(){ :|:& };: