Listing ANSI C String Manipulation

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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
 
char schemasuff[50];
 
int main() 
{
  int gui = 200;
  char c;
  char b;
  char wort1[20] = {0};
  char wort2[210] = {0};
  char merker[210] = {0};
  char *schema(char *text);
  void lezeilo(char *str);
  void pass(char path[1035], char klar[100],int zahl1,int zahl2);
  void lower_string(char s[]);
  char limit[] = ",";
  char befehl[250];
  char wortbas[200];
  char pwgen[1035];
  char passlast[100];
  char passklar[100];
  char datei[20];
  char dateiG[20];
  extern char schemasuff[50];
  int zaehler = 0;
  int zaehlbas = 0;
  int schalter1 = 0;
  int schalter2 = 0;
  time_t zeit;
  int zahl1,zahl2;
  srand((unsigned) time(&zeit));
  strcpy(passlast,"\0");
  printf("Dateiname LDAP User (Benutzer1.ldif): ");
  fgets(datei,20,stdin);
  lezeilo(datei);
  if (strlen(datei)<6) strcpy(datei,"Benutzer1.ldif");
  FILE *exldap;
  FILE *imldap;
  FILE *passl;
  passl = fopen("passliste.txt", "w");
  imldap = fopen("import.ldif", "w");
  if  ( (exldap = fopen(datei, "r")) == NULL) {
    printf("\nUser Falsch\n");
    exit(0);
  }
 
  printf("Dateiname LDAP Gruppe (Gruppen1.ldif): ");
  fgets(dateiG,20,stdin);
  lezeilo(dateiG);
  if (strlen(dateiG)<6) strcpy(dateiG,"Gruppen1.ldif");
  FILE *exGldap;
  FILE *imGldap;
  imGldap = fopen("importG.ldif", "w");
  if  ( (exGldap = fopen(dateiG, "r")) == NULL) {
    printf("\nGruppe Falsch\n");
    exit(0);
  }
  printf("Schema (DC=bsp,DC=test,DC=de): ");
  fgets(schemasuff,50,stdin);
  lezeilo(schemasuff);
  if (strlen(schemasuff)<6) strcpy(schemasuff,"DC=bsp,DC=test,DC=de");
 
  printf("\n");
 
  while((c = fgetc(exldap))!=EOF) {
 
  if ((schalter2 == 0) && (c == 'd' || c == 'i' || c == 'o') && (zaehler == 0)) {
                schalter2 = 1;
                //
                // Ausblenden der Kommentare zu Beginn
                } 
 
  if ((schalter1 == 0) && (schalter2 == 1) && (c != '\n')) {            
                wort1[zaehler++] = c;
 
                } else if ((schalter1 == 1) && (schalter2 == 1) && (c != '\n'))
                {
                wort2[zaehler++] = c;
 
                } 
 
 
  if ((schalter1 == 0 && schalter2 == 1 && c == ' ') || (schalter2 == 1 && c == '\n')) {
 
        if (schalter1 == 0 && zaehler > 1) {
                schalter1 = 1;
                } else if ((schalter1 == 1 && c == '\n'))
                {
 
                // Schema Aenderung
 
                if (strcmp(wort1,"dn:: ") == 0) {
                    // Sonderfall dn:: Base64
                    // encode schreiben und lesen
                    lezeilo(wort2);
                    strcpy(befehl,"echo ");
                    strcat(befehl,wort2);
                    strcat(befehl,"|base64 -d > base.txt");                
                    system(befehl);
 
                    FILE* base = fopen("base.txt", "r");                
 
                    while((b = fgetc(base))!=EOF) {
 
                      wortbas[zaehlbas++] = b;
                    }
 
                    strcpy(wort2,schema(wortbas));
 
                    zaehlbas = 0;
                    memset(wortbas,'\0',200);
                    fclose(base);
                    // decode schreiben und lesen
                    strcpy(befehl,"echo ");
 
                    strcat(befehl,wort2);
                    strcat(befehl,"|base64 > base.txt");
                    system(befehl);
                    FILE* baseR = fopen("base.txt", "r");
 
                    while((b = fgetc(base))!=EOF) {
 
                      if (b != '\n') wortbas[zaehlbas++] = b;
                    }
 
                    strcpy(wort2,wortbas);
                    // printf("Durchlauf %i\n",durch);
                    // durch++;
                    zaehlbas = 0;
                    memset(wortbas,'\0',200);
                    fclose(baseR);
 
                }
 
 
                if (strstr(wort1,"dn::") || strstr(wort1,"dn:")) {
                    //printf("\n");                
                    /*
 
                    Injektion Passwort
 
                    */
                     //fprintf(passl,"%s;",wort2);
 
                     strcpy(merker,wort2);
                     lezeilo(merker);
                     fprintf(imldap,"\n");
                    }
 
                if (strcmp(wort1,"dn: ") == 0) strcpy(wort2,schema(wort2));
 
                // Namensaenderung
 
                if (strcmp(wort1,"sAMAccountName: ") == 0) {
                     strcpy(wort1,"uid: ");
                    /*
 
                    Injektion Passwort
 
                    */
                     strcpy(pwgen,"\0");
                     strcpy(passklar,"\0");
 
                     zahl1 = rand() % 10;
                     zahl2 = rand() % 10;
                     pass(pwgen,passklar,zahl1,zahl2);
                     lezeilo(pwgen);
                     fprintf(imldap,"userpassword: %s\n",pwgen);
                     fprintf(passl,"%s;%s;%s;%s\n",merker,pwgen,passklar,wort2);
                     strcpy(pwgen,"\0");
                     strcpy(passklar,"\0");            
                     strcpy(merker,"\0"); 
                     lower_string(wort2);
                     }
                if (strncmp(wort2,"person",5) == 0 ) strcpy(wort1,"#");
                if (strncmp(wort2,"user",4) == 0 ) strcpy(wort1,"#");
                if (strncmp(wort2,"organizationalPerson",10) == 0 ) strcpy(wort2,"inetOrgPerson");
                if (strncmp(wort1,"name:: ",6) == 0 ) strcpy(wort1,"#");                                
                //
                if (schalter1 == 1 && c != ' ') {
                if (strcmp(wort1,"#") != 0) {
                      //printf("%s%s\n",wort1,wort2);
                      fprintf(imldap,"%s%s\n",wort1,wort2);
                      }
 
                memset(wort2,'\0',200);
                memset(wort1,'\0',20);
                schalter1 = 0;
                }
                }
        zaehler = 0;
 
      }
        if (schalter2 == 0 && c == '\n') {
        zaehler = 0;
        } else if (schalter2 == 0) {
        zaehler++;
        }
                                  }
  //printf("\n# Benutzer Fertig\n");
  fprintf(imldap,"\n");
  // fclose(exldap);
  fclose(imldap);
  fclose(passl);
 
// Beginn der Routine fuer Gruppen Konvertierung
 
  strcpy(befehl,"\0");
  while(fgets(befehl,250,exGldap)) {
  if ((strstr(befehl,"#") == 0) && strlen(befehl)>3) {
 
 
        zaehler = strlen(befehl);
        strncpy(wort1,strtok(befehl," "),20);
        if (zaehler>1) {
          strncpy(wort2,strtok(NULL,"\0"),200);
          } else {
          strcpy(wort2,"\0");
          } 
 
 
        lezeilo(wort2);
 
        if (strcmp(wort2,"group\r") == 0) strcpy(wort2,"posixgroup");
        if (strcmp(wort1,"dn:") == 0) {
           if ( gui > 200 ) {
           fprintf(imGldap,"gidnumber: %i\n",gui);
           }
           gui++;
           fprintf(imGldap,"\n");
           strncpy(wortbas,strtok(wort2,","),200);
           strcat(wortbas,",OU=Gruppen,");
           strcat(wortbas,schemasuff);
           strcat(wortbas,"\0");
           strncpy(wort2,wortbas,200);
 
            }        
 
/*        if (strcmp(wort1,"member::") == 0) {
            // Sonderfall Base64
            strcpy(wort1,"member:");
            zaehlbas = 0;
            lezeilo(wort2);
            strcpy(befehl,"echo ");
            strncat(befehl,wort2,200);
            strncat(befehl,"|base64 -d > base.txt",30);
            system(befehl);
            FILE* base = fopen("base.txt", "r");
 
            while((b = fgetc(base))!=EOF) {
            if (b != '\n') wortbas[zaehlbas++] = b;
                    }
 
            fclose(base);
            strncpy(wort2,wortbas,200);
 
            } 
*/
        if (strncmp(wort1,"member:",6) == 0) {
            // member nach cn suchen
             rewind(exldap);
              lezeilo(wort2);
              if (strncmp(wort1,"member:",7) == 0) strcpy(wortbas,"dn: ");
              if (strncmp(wort1,"member::",8) == 0) strcpy(wortbas,"dn:: ");
              strcat(wortbas,wort2);
              // Zeilenweise durchlaufen der AD Datei
             schalter1 = 0;
             while(fgets(befehl,250,exldap)) {
                if (strncmp(befehl,wortbas,20) == 0) schalter1 = 1;
                if ((strncmp(befehl,"sAMAccountName:",15) == 0) && schalter1 == 1) {
                    strcpy(wort1,"memberuid: ");
                    strcpy(wort2,strtok(befehl," "));
                    strcpy(wort2,strtok(NULL,"\r"));
//                    lezeilo(wort2);
                    lower_string(wort2);
                    schalter1 = 0;
                }               
             }
            }
 
        fprintf(imGldap,"%s %s\n",wort1,wort2);
        //printf("%s %s\n",wort1,wort2);
        }
  }
fprintf(imGldap,"gidnumber: %i\n",gui);
  //printf("\n# Gruppe Fertig\n");
  fprintf(imGldap,"\n");
//  fclose(exldap);
//  fclose(exGldap);
  fclose(imGldap);
  printf("\nOK\n");
  return 0;
}
 
 char *schema(char *text) {
  int laenge = 0;
  int stop = 0;
  int zaehler1 = 0;
  int zaehler2 = 54;
  extern char schemasuff[50];
  char c;
  char *teil1;
  char *teil2;
  char teil3[] = "OU=Benutzer,";
  char **z = (char**) malloc((5)*sizeof(char*));
  char *teil;
  char limit[] = ",";
  laenge = strlen(text);
  if (laenge<60) exit(0);
  // Schema zerschneiden
  teil = (char*)malloc(200);
  teil = strtok(text,limit);
 
  while(teil != NULL) {
  z[zaehler1] = teil;
//   printf("Teil: %s\n",z[zaehler1]);
   teil = strtok(NULL,limit); 
   zaehler1++;
  }
      teil1= z[0];
      teil2= z[zaehler1-6];
  zaehler1 = 0;
  strncpy(text,teil1,strlen(teil1));
  strncat(text,limit,1);
// Segmentation fault
  strncat(text,teil2,7);
 
  strncat(text,limit,1);
  strcat(teil3,schemasuff);
    strcat(teil3,"\0");
  strcat(text,teil3);
 
  return text;
 }
 
// lezeilo --> letztes Zeichen loeschen
void lezeilo(char *str) {
   size_t p=strlen(str);
   str[p-1]='\0';
}
 
void pass(char path[1035], char klar[100], int zahl1, int zahl2)
{
  char befehl[200];
  FILE *fp;
  char helfer[1035];
  strcpy(path,"\0");
  strcpy(klar,"\0");
 
  // sechsstelliges Passwort
 
  switch(zahl1) {
     case 1: strcat(klar,"hUj3"); break;
     case 2: strcat(klar,"e5J7"); break;
     case 3: strcat(klar,"tTu8"); break;
     case 4: strcat(klar,"aub1"); break;
     case 5: strcat(klar,"a7Vj"); break;
     case 6: strcat(klar,"i5co"); break;
     case 7: strcat(klar,"Dfva"); break;
     case 8: strcat(klar,"7cXm"); break;
     case 9: strcat(klar,"juts"); break;
     default: strcat(klar,"PO68"); break;
  }
 
  switch(zahl2) {
     case 1: strcat(klar,"sdpK"); break;
     case 2: strcat(klar,"q4km"); break;
     case 3: strcat(klar,"7G6b"); break;
     case 4: strcat(klar,"vesm"); break;
     case 5: strcat(klar,"tTau"); break;
     case 6: strcat(klar,"elqx"); break;
     case 7: strcat(klar,"wbk3"); break;
     case 8: strcat(klar,"sHmb"); break;
     case 9: strcat(klar,"2mh6"); break;
     default: strcat(klar,"aps5"); break;
  }
 
  strcpy(befehl,"passtest.sh ");
  strcat(befehl,klar);
 
  fp = popen(befehl, "r");
  if (fp == NULL) {
    printf("Fehler!\n" );
    exit(1);
  }
 
  while (fgets(helfer, sizeof(path), fp) != NULL) {
    //printf("%s", path);
    strcat(path,helfer);
  }
 
  pclose(fp);
}
 
void lower_string(char s[]) {
// schieben der ASCII Werte zu lowercase
   int c = 0;
   while (s[c] != '\0') {
        if (s[c] >= 'A' && s[c] <= 'Z') {
                s[c] = s[c] + 32;
        }
   c++;
   }
}