From a935ad1857b91b6aa179d14137f520d978647341 Mon Sep 17 00:00:00 2001
From: Aris Adamantiadis <aris@0xbadc0de.be>
Date: Sat, 25 Jul 2009 17:03:01 +0200
Subject: New example directory with the begining of a scp

---
 examples/authentication.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 examples/authentication.c

(limited to 'examples/authentication.c')

diff --git a/examples/authentication.c b/examples/authentication.c
new file mode 100644
index 0000000..06a0b71
--- /dev/null
+++ b/examples/authentication.c
@@ -0,0 +1,114 @@
+/*
+ * authentication.c
+ * This file contains an example of how to do an authentication to a
+ * SSH server using libssh
+ */
+
+/*
+Copyright 2003-2009 Aris Adamantiadis
+
+This file is part of the SSH Library
+
+You are free to copy this file, modify it in any way, consider it being public
+domain. This does not apply to the rest of the library though, but it is
+allowed to cut-and-paste working code from this file to any license of
+program.
+The goal is to show the API in action. It's not a reference on how terminal
+clients must be made or how a client should react.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libssh/libssh.h>
+#include "examples_common.h"
+
+int authenticate_kbdint(ssh_session session){
+  int err=ssh_userauth_kbdint(session,NULL,NULL);
+  const char *name, *instruction, *prompt;
+  char *ptr;
+  char buffer[128];
+  int i,n;
+  char echo;
+  while (err==SSH_AUTH_INFO){
+    name=ssh_userauth_kbdint_getname(session);
+    instruction=ssh_userauth_kbdint_getinstruction(session);
+    n=ssh_userauth_kbdint_getnprompts(session);
+    if(strlen(name)>0)
+      printf("%s\n",name);
+    if(strlen(instruction)>0)
+      printf("%s\n",instruction);
+    for(i=0;i<n;++i){
+      prompt=ssh_userauth_kbdint_getprompt(session,i,&echo);
+      if(echo){
+        printf("%s",prompt);
+        fgets(buffer,sizeof(buffer),stdin);
+        buffer[sizeof(buffer)-1]=0;
+        if((ptr=strchr(buffer,'\n')))
+          *ptr=0;
+        if (ssh_userauth_kbdint_setanswer(session,i,buffer) < 0) {
+          return SSH_AUTH_ERROR;
+        }
+        memset(buffer,0,strlen(buffer));
+      } else {
+        ptr=getpass(prompt);
+        if (ssh_userauth_kbdint_setanswer(session,i,ptr) < 0) {
+          return SSH_AUTH_ERROR;
+        }
+      }
+    }
+    err=ssh_userauth_kbdint(session,NULL,NULL);
+  }
+  return err;
+}
+
+int authenticate_console(ssh_session session){
+  int auth;
+  int methods;
+  char *password;
+  char *banner;
+
+  ssh_userauth_none(session, NULL);
+  methods = ssh_auth_list(session);
+  printf("supported auth methods: ");
+  if (methods & SSH_AUTH_METHOD_PUBLICKEY) {
+    printf("publickey");
+  }
+  if (methods & SSH_AUTH_METHOD_INTERACTIVE) {
+    printf(", keyboard-interactive");
+  }
+  if (methods & SSH_AUTH_METHOD_PASSWORD) {
+    printf(", password");
+  }
+  printf("\n");
+
+  auth=ssh_userauth_autopubkey(session, NULL);
+  if(auth==SSH_AUTH_ERROR){
+    return auth;
+  }
+  banner=ssh_get_issue_banner(session);
+  if(banner){
+    printf("%s\n",banner);
+    free(banner);
+  }
+  if(auth!=SSH_AUTH_SUCCESS && (methods & SSH_AUTH_METHOD_INTERACTIVE)){
+    auth=authenticate_kbdint(session);
+    if(auth==SSH_AUTH_ERROR){
+      return auth;
+    }
+  }
+  if(auth!=SSH_AUTH_SUCCESS && (methods & SSH_AUTH_METHOD_PASSWORD)){
+    password=getpass("Password: ");
+    if(ssh_userauth_password(session,NULL,password) != SSH_AUTH_SUCCESS){
+      return auth;
+    }
+    memset(password,0,strlen(password));
+  }
+  if(auth==SSH_AUTH_SUCCESS)
+    ssh_log(session, SSH_LOG_FUNCTIONS, "Authentication success");
+  if(auth==SSH_AUTH_PARTIAL)
+    return SSH_AUTH_DENIED;
+  return auth;
+}
-- 
cgit