export from svn

src/v_check_sys_user_password.c

@@ -0,0 +1,86 @@
+/***************************************************************************/
+/*  v_check_passwd.c                                                       */
+/*                                                                         */
+/*  This program compare user pasword from input with /etc/shadow          */
+/*  To compile run:                                                        */
+/*  "gcc -lcrypt v_check_sys_user_password.c -o v_check_sys_user_password" */
+/*                                                                         */
+/*  Thanks to: bogolt, richie and burus                                    */
+/*                                                                         */
+/***************************************************************************/
+
+#define _XOPEN_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <shadow.h>
+#include <time.h>
+#include <string.h>
+
+
+int main (int argc, char** argv) {
+    // defining ip
+    char *ip = "127.0.0.1";
+
+    // checking argument list
+    if (3 > argc) {
+        printf("Error: bad args\n",argv[0]);
+        printf("Usage: %s user password [ip]\n",argv[0]);
+        exit(3);
+    };
+
+    // checking ip
+    if (4 <= argc) {
+      ip = (char*)malloc(strlen(argv[3]));
+      strcpy(ip, argv[3]);
+    }
+
+    // formating current time
+    time_t lt = time(NULL);
+    struct tm* ptr = localtime(&lt);
+    char str[280];
+    strftime(str, 100, "%m-%d-%y %H:%m:%S ", ptr);
+
+    // openning log file
+    FILE* pFile = fopen ("/usr/local/vesta/log/auth.log","a+");
+    if (NULL == pFile) {
+        printf("Error: can not open file %s \n", argv[0]);
+        exit(7);
+    }
+
+    // parsing user argument
+    struct passwd* userinfo = getpwnam(argv[1]);
+    if (NULL != userinfo) {
+        struct spwd* passw = getspnam(userinfo->pw_name);
+        if (NULL != passw) {
+            char* cryptedPasswrd = (char*)crypt(argv[2], passw->sp_pwdp);
+            if (strcmp(passw->sp_pwdp,crypt(argv[2],passw->sp_pwdp))==0) {
+                // concatinating time with user and ip
+                strcat(str, userinfo->pw_name);
+                strcat(str, " ");
+                strcat(str, ip);
+                strcat(str, " successfully logged in \n");
+                fputs (str,pFile);      // writing
+                fclose (pFile);         // closing
+                exit(EXIT_SUCCESS);     // exiting
+            } else {
+                // concatinating time with user string
+                printf ("Error: password missmatch\n");
+                strcat(str, userinfo->pw_name);
+                strcat(str, " ");
+                strcat(str, ip);
+                strcat(str, " failed to login \n");
+                fputs (str,pFile);      // writing
+                fclose (pFile);         // closing
+                exit(24);               // exiting
+            };
+        }
+    } else {
+        printf("Error: no such user\n",argv[1]);
+        exit(21);
+    };
+
+    return EXIT_SUCCESS;
+};