From 74a67d2d3f9fd1e4e120373e49e6b02858d92bb9 Mon Sep 17 00:00:00 2001
From: jsorg71 <jsorg71>
Date: Sat, 4 Jun 2005 23:51:51 +0000
Subject: added non pam authentication

---
 sesman/verify_user.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 sesman/verify_user.c

(limited to 'sesman/verify_user.c')

diff --git a/sesman/verify_user.c b/sesman/verify_user.c
new file mode 100644
index 00000000..60ff48c0
--- /dev/null
+++ b/sesman/verify_user.c
@@ -0,0 +1,137 @@
+/*
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+   xrdp: A Remote Desktop Protocol server.
+   Copyright (C) Jay Sorg 2005
+
+   authenticate user
+
+*/
+
+#ifdef USE_PAM
+
+#include <security/pam_userpass.h>
+
+#define SERVICE "xrdp"
+
+/******************************************************************************/
+/* returns boolean */
+int auth_userpass(char* user, char* pass)
+{
+  pam_handle_t* pamh;
+  pam_userpass_t userpass;
+  struct pam_conv conv = {pam_userpass_conv, &userpass};
+  const void* template1;
+  int status;
+
+  userpass.user = user;
+  userpass.pass = pass;
+  if (pam_start(SERVICE, user, &conv, &pamh) != PAM_SUCCESS)
+  {
+    return 0;
+  }
+  status = pam_authenticate(pamh, 0);
+  if (status != PAM_SUCCESS)
+  {
+    pam_end(pamh, status);
+    return 0;
+  }
+  status = pam_acct_mgmt(pamh, 0);
+  if (status != PAM_SUCCESS)
+  {
+    pam_end(pamh, status);
+    return 0;
+  }
+  status = pam_get_item(pamh, PAM_USER, &template1);
+  if (status != PAM_SUCCESS)
+  {
+    pam_end(pamh, status);
+    return 0;
+  }
+  if (pam_end(pamh, PAM_SUCCESS) != PAM_SUCCESS)
+  {
+    return 0;
+  }
+  return 1;
+}
+
+#else
+
+#define _XOPEN_SOURCE
+#include <unistd.h>
+#include <string.h>
+#include <shadow.h>
+#include <pwd.h>
+
+/******************************************************************************/
+/* returns boolean */
+int auth_userpass(char* user, char* pass)
+{
+  char salt[13] = "$1$";
+  char hash[35] = "";
+  char* encr = 0;
+  struct passwd* spw;
+  struct spwd* stp;
+  int saltcnt = 0;
+
+  spw = getpwnam(user);
+  if (spw == 0)
+  {
+    return 0;
+  }
+  if (strncmp(spw->pw_passwd, "x", 3) == 0)
+  {
+    /* the system is using shadow */
+    stp = getspnam(user);
+    if (stp == 0)
+    {
+      return 0;
+    }
+    strncpy(hash, stp->sp_pwdp, 34);
+  }
+  else
+  {
+    /* old system with only passwd */
+    strncpy(hash, spw->pw_passwd, 34);
+  }
+  hash[34] = '\0';
+  if (strncmp(hash, "$1$", 3) == 0)
+  {
+    /* gnu style crypt(); */
+    saltcnt = 3;
+    while ((hash[saltcnt] != '$') && (saltcnt < 11))
+    {
+      salt[saltcnt] = hash[saltcnt];
+      saltcnt++;
+    }
+    salt[saltcnt] = '$';
+    salt[saltcnt + 1] = '\0';
+  }
+  else
+  {
+    /* classic two char salt */
+    salt[0] = hash[0];
+    salt[1] = hash[1];
+    salt[2] = '\0';
+  }
+  encr = crypt(pass,salt);
+  if (strncmp(encr, hash, 34) != 0)
+  {
+    return 0;
+  }
+  return 1;
+}
+
+#endif
-- 
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