diff --git a/kdc/log.c b/kdc/log.c
new file mode 100644
index 000000000..1dd9fbbbe
--- /dev/null
+++ b/kdc/log.c
@@ -0,0 +1,34 @@
+#include "kdc_locl.h"
+RCSID("$Id$");
+
+static char *logfile = "kdc.log";
+static int loglevel = 17;
+
+void
+kdc_log(int level, const char *fmt, ...)
+{
+    va_list ap;
+    FILE *f;
+    char buf[128];
+    char *s;
+    
+    if(level > loglevel)
+	return;
+
+    if(logfile == NULL)
+	return;
+    f = fopen(logfile, "a");
+    if(f == NULL)
+	return;
+    
+    va_start(ap, fmt);
+    vasprintf(&s, fmt, ap);
+    va_end(ap);
+	
+    if(s == NULL)
+	return;
+    strftime(buf, sizeof(buf), "%d-%b-%Y %H:%M:%S", localtime(&kdc_time));
+    fprintf(f, "%s %s\n", buf, s);
+    fclose(f);
+    free(s);
+}