From 269cba9b00fa7ecb0d707ef5b6f10d34e049327c Mon Sep 17 00:00:00 2001
From: Matthias Andree <matthias.andree@gmx.de>
Date: Sat, 9 Oct 2010 11:26:12 +0200
Subject: Factor out common NTLM code.

---
 ntlmsubr.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 ntlmsubr.c

(limited to 'ntlmsubr.c')

diff --git a/ntlmsubr.c b/ntlmsubr.c
new file mode 100644
index 00000000..ab685ff0
--- /dev/null
+++ b/ntlmsubr.c
@@ -0,0 +1,74 @@
+#include "config.h"
+
+#ifdef NTLM_ENABLE
+#include "fetchmail.h"
+#include "ntlm.h"
+#include "socket.h"
+
+#include <string.h>
+
+int ntlm_helper(int sock, struct query *ctl, const char *proto)
+{
+/*
+ * NTLM support by Grant Edwards.
+ *
+ * Handle MS-Exchange NTLM authentication method.  This is the same
+ * as the NTLM auth used by Samba for SMB related services. We just
+ * encode the packets in base64 instead of sending them out via a
+ * network interface.
+ *
+ * Much source (ntlm.h, smb*.c smb*.h) was borrowed from Samba.
+ */
+    tSmbNtlmAuthRequest request;
+    tSmbNtlmAuthChallenge challenge;
+    tSmbNtlmAuthResponse response;
+
+    char msgbuf[2048];
+    int result;
+
+    if ((result = gen_recv(sock, msgbuf, sizeof msgbuf)))
+	return result;
+
+    if (0 != strcmp(msgbuf, "+ "))
+	return PS_AUTHFAIL;
+
+    buildSmbNtlmAuthRequest(&request,ctl->remotename,NULL);
+
+    if (outlevel >= O_DEBUG)
+	dumpSmbNtlmAuthRequest(stdout, &request);
+
+    memset(msgbuf,0,sizeof msgbuf);
+    to64frombits (msgbuf, &request, SmbLength(&request));
+
+    if (outlevel >= O_MONITOR)
+	report(stdout, "%s> %s\n", proto, msgbuf);
+
+    strcat(msgbuf,"\r\n");
+    SockWrite (sock, msgbuf, strlen (msgbuf));
+
+    if ((gen_recv(sock, msgbuf, sizeof msgbuf)))
+	return result;
+
+    (void)from64tobits (&challenge, msgbuf, sizeof(challenge));
+
+    if (outlevel >= O_DEBUG)
+	dumpSmbNtlmAuthChallenge(stdout, &challenge);
+
+    buildSmbNtlmAuthResponse(&challenge, &response,ctl->remotename,ctl->password);
+
+    if (outlevel >= O_DEBUG)
+	dumpSmbNtlmAuthResponse(stdout, &response);
+
+    memset(msgbuf,0,sizeof msgbuf);
+    to64frombits (msgbuf, &response, SmbLength(&response));
+
+    if (outlevel >= O_MONITOR)
+	report(stdout, "%s> %s\n", proto, msgbuf);
+
+    strcat(msgbuf,"\r\n");
+    SockWrite (sock, msgbuf, strlen (msgbuf));
+
+    return PS_SUCCESS;
+}
+
+#endif /* NTLM_ENABLE */
-- 
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