dergeorg/twmailer_vsys
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

LDAP Login, Makefile, Output Color

Browse Source
This commit is contained in:
Georg Reisinger 2020-10-27 18:19:21 +01:00
parent 7afb97993e
commit ddada8bb82
6 changed files with 683 additions and 365 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
client
View File

Binary file not shown.

91
client.c
View File

@ -54,26 +54,68 @@ int main (int argc, char **argv) {
if (connect ( create_socket, (struct sockaddr *) &address, sizeof (address)) == 0)
{
printf ("Connection with server (%s) established\n", inet_ntoa (address.sin_addr));
printf ("\x1b[32mConnection with server (%s) established\n\x1b[0m", inet_ntoa (address.sin_addr));
size=recv(create_socket,buffer,BUF-1, 0);
if (size>0)
{
buffer[size]= '\0';
printf("%s",buffer);
printf("\x1b[36m%s\x1b[0m",buffer);
}
}
else
{
perror("Connect error - no server available");
perror("\x1b[31mConnect error - no server available\x1b[0m");
return EXIT_FAILURE;
}
bool login = false;
do {
//command vom user überprüfen
char command[6] = "";
printf ("\nEnter Command: \n");
fgets (command, 6, stdin);
char command[7] = "";
printf ("\n\x1b[35mEnter Command:\x1b[0m \n");
fgets (command, 7, stdin);
if (startsWith("login", command) == true && login == false)
{
char username[10] = "";
char pw[50] = "";
char bufferString[BUF] = "";
strcpy(bufferString, "login;");
//User Dateneingabe und daten einlesen
printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
fgets (username, 10, stdin);
printf("\x1b[35m<Passwort max. 50 Zeichen>\x1b[0m\n");
fgets (pw, 50, stdin);
strcat(bufferString, username);
strcat(bufferString, ";");
strcat(bufferString, pw);
remN(bufferString);
send(create_socket, bufferString, strlen (bufferString), 0);
//Response vom Server (OK oder ERR) empfangen und ausgeben
char readBuffer[BUF] = "";
read(create_socket , readBuffer, 1024);
printf("\n%s\n", readBuffer);
if (strncmp(readBuffer, "OK", 2) == 0)
{
login = true;
}
}else if (login == false && startsWith("quit", command) == true)
{
strcpy(buffer, "quit\n");
}else if (login == false)
{
printf("\x1b[33mBitte zuerst <login> eingeben. Erst danach können sie auf das Program zugreifen!\x1b[0m\n");
}
if(login == true){
//je nach command wird was audgeführt
if(startsWith("send", command) == true) {
@ -87,16 +129,16 @@ int main (int argc, char **argv) {
strcat(bufferString, "send");
//User Dateneingabe und daten einlesen
printf("<Sender max. 8 Zeichen>\n");
printf("\x1b[35m<Sender max. 8 Zeichen>\x1b[0m\n");
fgets (sender, 8, stdin);
printf("<Empfänger max. 8 Zeichen>\n");
printf("\x1b[35m<Empfänger max. 8 Zeichen>\x1b[0m\n");
fgets (empfaenger, 8, stdin);
printf("<Betreff max. 80 Zeichen>\n");
printf("\x1b[35m<Betreff max. 80 Zeichen>\x1b[0m\n");
fgets (betreff, 80, stdin);
printf("<Nachricht, beliebige Anzahl an Zeilen>\n");
printf("\x1b[35m<Nachricht, beliebige Anzahl an Zeilen>\x1b[0m\n");
fgets (nachricht, 80, stdin);
//Buffer formatieren
@ -114,7 +156,7 @@ int main (int argc, char **argv) {
//Response vom Server (OK oder ERR) empfangen und ausgeben
char readBuffer[BUF] = "";
int valread = read(create_socket , readBuffer, 1024);
read(create_socket , readBuffer, 1024);
printf("\n%s\n", readBuffer);
}
@ -125,9 +167,9 @@ int main (int argc, char **argv) {
char p[20] = "";
int counter = 0;
printf("<Username max. 8 Zeichen>\n");
printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
fgets (username, 8, stdin);
printf("<Posteingang oder Postausgang>\n");
printf("\x1b[35m<Posteingang oder Postausgang>\x1b[0m\n");
fgets (p, 20, stdin);
strcat(bufferString, ";");
@ -139,7 +181,7 @@ int main (int argc, char **argv) {
send(create_socket, bufferString, strlen (bufferString), 0);
char readBuffer[BUF] = "";
int valread = read(create_socket , readBuffer, 1024);
read(create_socket , readBuffer, 1024);
char delimiter[] = ";";
char *ptr;
@ -157,7 +199,7 @@ int main (int argc, char **argv) {
}
else if (counter == 0) {
printf("<Anzahl der Nachrichten für den User: %s>\n", ptr);
printf("\x1b[35m<Anzahl der Nachrichten für den User: %s>\x1b[0m\n", ptr);
}
else {
@ -179,11 +221,11 @@ int main (int argc, char **argv) {
char nid[80] = "";
char folder[20] = "";
printf("<Username max. 8 Zeichen>\n");
printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
fgets (username, 8, stdin);
printf("<posteingang oder postausgang>\n");
printf("\x1b[35m<posteingang oder postausgang>\x1b[0m\n");
fgets (folder, 20, stdin);
printf("<Nachrichten-Nummer>\n");
printf("\x1b[35m<Nachrichten-Nummer>\x1b[0m\n");
fgets (nid, 80, stdin);
strcat(bufferString, ";");
@ -201,7 +243,7 @@ int main (int argc, char **argv) {
//strcpy(buffer, "");
//buffer[size]= '\0';
char readBuffer[BUF] = "";
int valread = read(create_socket , readBuffer, 1000);
read(create_socket , readBuffer, 1000);
printf("\n%s\n", readBuffer );
}
@ -214,11 +256,11 @@ int main (int argc, char **argv) {
char bufferString[BUF] = "del";
char p[20] = "";
printf("<Username max. 8 Zeichen>\n");
printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
fgets (username, 8, stdin);
printf("<Posteingang oder Postausgang>\n");
printf("\x1b[35m<Posteingang oder Postausgang>\x1b[0m\n");
fgets (p, 20, stdin);
printf("<Nachrichten-Nummer>\n");
printf("\x1b[35m<Nachrichten-Nummer>\x1b[0m\n");
fgets (nachrichtennummer, 80, stdin);
strcat(bufferString, ";");
@ -232,7 +274,7 @@ int main (int argc, char **argv) {
send(create_socket, bufferString, strlen (bufferString), 0);
char readBuffer[BUF] = "";
int valread = read(create_socket , readBuffer, 1024);
read(create_socket , readBuffer, 1024);
printf("\n%s\n", readBuffer );
}
@ -244,6 +286,7 @@ int main (int argc, char **argv) {
else {
printf("DAS IST KEIN COMMAND!!!!!");
}
}

9
makefile
View File

@ -1,7 +1,8 @@
#Client und Server kompilieren
all: server.c client.c
gcc server.c -o server -lpthread
gcc client.c -o client -lpthread
gcc -Wall -o server server.c -lldap -llber -lpthread
gcc -Wall -o client client.c -lldap -llber -lpthread
#Kompilierten Client und Server löschen
clean: client server
@ -9,11 +10,11 @@ clean: client server
#Nur den Client kompilieren:
client: client.c
gcc client.c -o client -lpthread
gcc -Wall -o client client.c -lldap -llber -lpthread
#Nur den Server kompilieren:
server: server.c
gcc server.c -o server -lpthread
gcc -Wall -o server server.c -lldap -llber -lpthread
#Kompilierten Server löschen
cleanS: server

1
readme.md
View File

@ -2,6 +2,7 @@
# Protokoll 🔧
```
LOGIN: login;username;passwort
SEND: send;sender;empänger;betreff;nachricht
LIST: list:username;postEinAusgang
READ: read;username;postEinAusgang;nid

BIN
server
View File

Binary file not shown.

289
server.c
View File

@ -14,6 +14,9 @@
#include <dirent.h>
#include <time.h>
#include <pthread.h>
#include <ldap.h>
#include <termios.h>
#define MAXCHAR 1000
#define BUF 1024
@ -51,21 +54,297 @@ int countFiles(char path[]) {
return file_count;
}
int login_user(char username[8], char pw[50])
{
////////////////////////////////////////////////////////////////////////////
// LDAP config
// anonymous bind with user and pw empty
const char *ldapUri = "ldap://ldap.technikum-wien.at:389";
const int ldapVersion = LDAP_VERSION3;
// read username (bash: export ldapuser=<yourUsername>)
char ldapBindUser[256];
char rawLdapUser[128];
strcpy(rawLdapUser, username);
sprintf(ldapBindUser, "uid=%s,ou=people,dc=technikum-wien,dc=at", rawLdapUser);
printf("user set to: %s\n", ldapBindUser);
// read password (bash: export ldappw=<yourPW>)
char ldapBindPassword[256];
strcpy(ldapBindPassword, pw);
printf("pw taken over from commandline: %s\n", pw);
// search settings
const char *ldapSearchBaseDomainComponent = "dc=technikum-wien,dc=at";
const char *ldapSearchFilter = "(uid=if20b20*)";
ber_int_t ldapSearchScope = LDAP_SCOPE_SUBTREE;
const char *ldapSearchResultAttributes[] = {"uid", "cn", NULL};
// general
int rc = 0; // return code
////////////////////////////////////////////////////////////////////////////
// setup LDAP connection
// https://linux.die.net/man/3/ldap_initialize
LDAP *ldapHandle;
rc = ldap_initialize(&ldapHandle, ldapUri);
if (rc != LDAP_SUCCESS)
{
fprintf(stderr, "ldap_init failed\n");
return 0;
}
printf("connected to LDAP server %s\n", ldapUri);
////////////////////////////////////////////////////////////////////////////
// set verison options
// https://linux.die.net/man/3/ldap_set_option
rc = ldap_set_option(
ldapHandle,
LDAP_OPT_PROTOCOL_VERSION, // OPTION
&ldapVersion); // IN-Value
if (rc != LDAP_OPT_SUCCESS)
{
// https://www.openldap.org/software/man.cgi?query=ldap_err2string&sektion=3&apropos=0&manpath=OpenLDAP+2.4-Release
fprintf(stderr, "ldap_set_option(PROTOCOL_VERSION): %s\n", ldap_err2string(rc));
ldap_unbind_ext_s(ldapHandle, NULL, NULL);
return 0;
}
////////////////////////////////////////////////////////////////////////////
// start connection secure (initialize TLS)
// https://linux.die.net/man/3/ldap_start_tls_s
// int ldap_start_tls_s(LDAP *ld,
// LDAPControl **serverctrls,
// LDAPControl **clientctrls);
// https://linux.die.net/man/3/ldap
// https://docs.oracle.com/cd/E19957-01/817-6707/controls.html
// The LDAPv3, as documented in RFC 2251 - Lightweight Directory Access
// Protocol (v3) (http://www.faqs.org/rfcs/rfc2251.html), allows clients
// and servers to use controls as a mechanism for extending an LDAP
// operation. A control is a way to specify additional information as
// part of a request and a response. For example, a client can send a
// control to a server as part of a search request to indicate that the
// server should sort the search results before sending the results back
// to the client.
rc = ldap_start_tls_s(
ldapHandle,
NULL,
NULL);
if (rc != LDAP_SUCCESS)
{
fprintf(stderr, "ldap_start_tls_s(): %s\n", ldap_err2string(rc));
ldap_unbind_ext_s(ldapHandle, NULL, NULL);
return 0;
}
////////////////////////////////////////////////////////////////////////////
// bind credentials
// https://linux.die.net/man/3/lber-types
// SASL (Simple Authentication and Security Layer)
// https://linux.die.net/man/3/ldap_sasl_bind_s
// int ldap_sasl_bind_s(
// LDAP *ld,
// const char *dn,
// const char *mechanism,
// struct berval *cred,
// LDAPControl *sctrls[],
// LDAPControl *cctrls[],
// struct berval **servercredp);
BerValue bindCredentials;
bindCredentials.bv_val = (char *)ldapBindPassword;
bindCredentials.bv_len = strlen(ldapBindPassword);
BerValue *servercredp; // server's credentials
rc = ldap_sasl_bind_s(
ldapHandle,
ldapBindUser,
LDAP_SASL_SIMPLE,
&bindCredentials,
NULL,
NULL,
&servercredp);
if (rc != LDAP_SUCCESS)
{
fprintf(stderr, "LDAP bind error: %s\n", ldap_err2string(rc));
ldap_unbind_ext_s(ldapHandle, NULL, NULL);
return 0;
}
////////////////////////////////////////////////////////////////////////////
// perform ldap search
// https://linux.die.net/man/3/ldap_search_ext_s
// _s : synchronous
// int ldap_search_ext_s(
// LDAP *ld,
// char *base,
// int scope,
// char *filter,
// char *attrs[],
// int attrsonly,
// LDAPControl **serverctrls,
// LDAPControl **clientctrls,
// struct timeval *timeout,
// int sizelimit,
// LDAPMessage **res );
LDAPMessage *searchResult;
rc = ldap_search_ext_s(
ldapHandle,
ldapSearchBaseDomainComponent,
ldapSearchScope,
ldapSearchFilter,
(char **)ldapSearchResultAttributes,
0,
NULL,
NULL,
NULL,
500,
&searchResult);
if (rc != LDAP_SUCCESS)
{
fprintf(stderr, "LDAP search error: %s\n", ldap_err2string(rc));
ldap_unbind_ext_s(ldapHandle, NULL, NULL);
return 0;
}
// https://linux.die.net/man/3/ldap_count_entries
printf("Total results: %d\n", ldap_count_entries(ldapHandle, searchResult));
////////////////////////////////////////////////////////////////////////////
// get result of search
// https://linux.die.net/man/3/ldap_first_entry
// https://linux.die.net/man/3/ldap_next_entry
LDAPMessage *searchResultEntry;
for (searchResultEntry = ldap_first_entry(ldapHandle, searchResult);
searchResultEntry != NULL;
searchResultEntry = ldap_next_entry(ldapHandle, searchResultEntry))
{
/////////////////////////////////////////////////////////////////////////
// Base Information of the search result entry
// https://linux.die.net/man/3/ldap_get_dn
printf("DN: %s\n", ldap_get_dn(ldapHandle, searchResultEntry));
/////////////////////////////////////////////////////////////////////////
// Attributes
// https://linux.die.net/man/3/ldap_first_attribute
// https://linux.die.net/man/3/ldap_next_attribute
//
// berptr: berptr, a pointer to a BerElement it has allocated to keep
// track of its current position. This pointer should be passed
// to subsequent calls to ldap_next_attribute() and is used to
// effectively step through the entry's attributes.
BerElement *ber;
char *searchResultEntryAttribute;
for (searchResultEntryAttribute = ldap_first_attribute(ldapHandle, searchResultEntry, &ber);
searchResultEntryAttribute != NULL;
searchResultEntryAttribute = ldap_next_attribute(ldapHandle, searchResultEntry, ber))
{
BerValue **vals;
if ((vals = ldap_get_values_len(ldapHandle, searchResultEntry, searchResultEntryAttribute)) != NULL)
{
for (int i = 0; i < ldap_count_values_len(vals); i++)
{
printf("\t%s: %s\n", searchResultEntryAttribute, vals[i]->bv_val);
if(strcmp(searchResultEntryAttribute,"uid") == 0){
if(strcmp(vals[i]->bv_val,rawLdapUser) == 0){
printf("\n\nGEFUNDEN!!!!!!!!!!!!!!!!!\n\n");
// Free Memory
ldap_value_free_len(vals);
ldap_memfree(searchResultEntryAttribute);
if (ber != NULL){
ber_free(ber, 0);
}
printf("\n");
ldap_msgfree(searchResult);
ldap_unbind_ext_s(ldapHandle, NULL, NULL);
return 1;
}
}
}
ldap_value_free_len(vals);
}
// free memory
ldap_memfree(searchResultEntryAttribute);
}
// free memory
if (ber != NULL)
{
ber_free(ber, 0);
}
printf("\n");
}
// free memory
ldap_msgfree(searchResult);
////////////////////////////////////////////////////////////////////////////
// https://linux.die.net/man/3/ldap_unbind_ext_s
// int ldap_unbind_ext_s(
// LDAP *ld,
// LDAPControl *sctrls[],
// LDAPControl *cctrls[]);
ldap_unbind_ext_s(ldapHandle, NULL, NULL);
return 0;
}
void *threadFun(void *arg){
int new_socket = *((int *)arg);
char buffer[BUF];
pthread_detach(pthread_self());
if(new_socket > 0){
strcpy(buffer, "Welcome to myserver, Please enter your command:\n");
strcpy(buffer, "Welcome to Lukas & Georgs Server, Please type <login> to login:\n");
send(new_socket, buffer, strlen(buffer),0);
}
bool login = false;
do {
int size = recv (new_socket, buffer, BUF-1, 0);
if( size > 0)
{
buffer[size] = '\0';
if (login == false)
{
// Do login
if (strncmp("login", buffer, 5) == 0)
{
char delimiter[] = ";";
char *ptr;
//den buffer mit dem seperator splitten
ptr = strtok(buffer, delimiter);
int counter = 0;
char username[9];
char pw[50];
while(ptr != NULL) {
if (counter == 1) {
strcpy(username, ptr);
}else if(counter == 2)
{
strcpy(pw, ptr);
}
counter = counter + 1;
// naechsten Abschnitt erstellen
ptr = strtok(NULL, delimiter);
}
if(login_user(username, pw) == 1){
login = true;
printf("Login geschafft!!");
//OK an den client zurücksenden
char suc[] = "OK";
send(new_socket , suc , strlen(suc) , 0 );
}else
{
printf("Login error!!!");
//OK an den client zurücksenden
char err[] = "ERR";
send(new_socket , err , strlen(err) , 0 );
}
}
}else{// Is logedin
// Überprüfen welchen command der client eingegeben hat,
// wenn command nicht zutreffend error zurücksenden
if(startsWith("send", buffer) == true) {
@ -76,13 +355,9 @@ void *threadFun(void *arg){
ptr = strtok(buffer, delimiter);
int counter = 0;
char filename1[] = "";
char filename2[] = "";
char sender[8] = "";
char content[] = "";
char empfaenger[8] = "";
char betreff[80] = "";
char nid[100] = "";
//timestamp als ersten teil der id erstellen
char ts[20];
@ -419,6 +694,7 @@ void *threadFun(void *arg){
send(new_socket , err , strlen(err) , 0 );
}
}
//printf ("\n content: \n %s", buffer);
@ -445,8 +721,6 @@ void *threadFun(void *arg){
int main (int argc, char **argv) {
int create_socket, new_socket;
socklen_t addrlen;
char buffer[BUF];
int size;
struct sockaddr_in address, cliaddress;
if( argc < 3 ){
@ -473,7 +747,6 @@ int main (int argc, char **argv) {
mkdir(argv[2], 0711);
pthread_t tid;
int i = 0;
while (1) {
printf("Waiting for connections...\n");
new_socket = accept ( create_socket, (struct sockaddr *) &cliaddress, &addrlen );