pwsniff added

diff --git a/Makefile b/Makefile
index 0d02917a5a74a6688fa9943375c98ff6a36e922f..2358c0487922f9844b7cac7548a11e0b7e5ffaf8 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -3,12 +3,12 @@ LIBIPULOG=../libipulog
 INCIPULOG=-I../libipulog/include
 
 # Names of the plugins to be compiled
-ULOGD_SL:=BASE OPRINT
+ULOGD_SL:=BASE OPRINT PWSNIFF
 
 #  Normally You should not need to change anything below
 #
 CC = gcc
-CFLAGS = -I. -g -Wall $(INCIPULOG)
+CFLAGS = -I. -g -Wall $(INCIPULOG) # -DDEBUG
 SH_CFLAGS:=$(CFLAGS) -fPIC
 
 SHARED_LIBS+=$(foreach T,$(ULOGD_SL),extensions/ulogd_$(T).so)

diff --git a/extensions/ulogd_PWSNIFF.c b/extensions/ulogd_PWSNIFF.c
new file mode 100644 (file)
index 0000000..4fe5a62
--- /dev/null
+++ b/extensions/ulogd_PWSNIFF.c
@@ -0,0 +1,143 @@
+/* ulogd_PWSNIFF.c, Version $Revision: 1.3 $
+ *
+ * ulogd logging interpreter for POP3 / FTP like plaintext passwords.
+ *
+ * (C) 2000 by Harald Welte <laforge@sunbeam.franken.de>
+ * This software is released under the terms of GNU GPL
+ *
+ * $Id: ulogd_PWSNIFF.c,v 1.3 2000/08/14 08:28:24 laforge Exp $
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ulogd.h>
+#include <string.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/tcp.h>
+
+#ifdef DEBUG
+#define DEBUGP ulogd_error
+#else
+#define DEBUGP(format, args...)
+#endif
+
+
+#define PORT_POP3      110
+#define PORT_FTP       21
+
+static u_int16_t pwsniff_ports[] = {
+       __constant_htons(PORT_POP3),
+       __constant_htons(PORT_FTP),
+};
+
+#define PWSNIFF_MAX_PORTS 2
+
+static char *_get_next_blank(char* begp, char *endp)
+{
+       char *ptr;
+
+       for (ptr = begp; ptr < endp; ptr++) {
+               if (*ptr == ' ' || *ptr == '\n' || *ptr == '\r') {
+                       return ptr-1;   
+               }
+       }
+       return NULL;
+}
+
+static ulog_iret_t *_interp_pwsniff(ulog_packet_msg_t *pkt)
+{
+       struct iphdr *iph = (struct iphdr *) pkt->payload;
+       void *protoh = (u_int32_t *)iph + iph->ihl;
+       struct tcphdr *tcph = protoh;
+       u_int32_t tcplen = ntohs(iph->tot_len) - iph->ihl * 4;
+       unsigned char  *ptr, *begp, *pw_begp, *endp, *pw_endp;
+       ulog_iret_t *ret = NULL;
+       ulog_iret_t *ret2;
+       int len, pw_len, i, cont = 0;
+
+       len = pw_len = 0;
+
+       if (iph->protocol != IPPROTO_TCP)
+               return NULL;
+       
+       for (i = 0; i <= PWSNIFF_MAX_PORTS; i++)
+       {
+               if (tcph->dest == pwsniff_ports[i]) {
+                       cont = 1; 
+                       break;
+               }
+       }
+       if (!cont)
+               return NULL;
+
+       DEBUGP("----> pwsniff detected, tcplen=%d, struct=%d, iphtotlen=%d, ihl=%d\n", tcplen, sizeof(struct tcphdr), ntohs(iph->tot_len), iph->ihl);
+
+       for (ptr = (unsigned char *) tcph + sizeof(struct tcphdr); 
+                       ptr < (unsigned char *) tcph + tcplen; ptr++)
+       {
+               if (!strncasecmp(ptr, "USER ", 5)) {
+                       begp = ptr+5;
+                       endp = _get_next_blank(begp, (char *)tcph + tcplen);
+                       if (endp)
+                               len = endp - begp + 1;
+               }
+               if (!strncasecmp(ptr, "PASS ", 5)) {
+                       pw_begp = ptr+5;
+                       pw_endp = _get_next_blank(pw_begp, 
+                                       (char *)tcph + tcplen);
+                       if (pw_endp)
+                               pw_len = pw_endp - pw_begp + 1;
+               }
+       }
+
+       if (len) {
+               ret = alloc_ret(ULOGD_RET_STRING, "pwsniff.user");
+               ret->value.ptr = (char *) malloc(len+1);
+               if (!ret->value.ptr) {
+                       ulogd_error("_interp_pwsniff: OOM (size=%u)\n", len);
+                       free(ret);
+                       return NULL;
+               }
+               strncpy(ret->value.ptr, begp, len);
+               *((char *)ret->value.ptr + len + 1) = '\0';
+       }
+       if (pw_len) {
+               ret2 = alloc_ret(ULOGD_RET_STRING,"pwsniff.pass");
+               ret2->value.ptr = (char *) malloc(pw_len+1);
+               if (!ret2->value.ptr){
+                       ulogd_error("_interp_pwsniff: OOM (size=%u)\n", pw_len);
+                       free(ret2);
+                       return NULL;
+               }
+               strncpy(ret2->value.ptr, pw_begp, pw_len);
+               *((char *)ret2->value.ptr + pw_len + 1) = '\0';
+
+               if (ret) 
+                       ret->next = ret2;
+               else
+                       ret = ret2;
+       }
+       return ret;
+}
+static ulog_interpreter_t base_ip[] = { 
+
+       { NULL, "pwsniff", &_interp_pwsniff },
+       { NULL, "", NULL }, 
+};
+void _base_reg_ip(void)
+{
+       ulog_interpreter_t *ip = base_ip;
+       ulog_interpreter_t *p;
+
+       for (p = ip; p->interp; p++)
+               register_interpreter(p);
+
+}
+
+
+void _init(void)
+{
+       _base_reg_ip();
+}