- djm@cvs.openbsd.org 2010/01/30 02:54:53

[openssh.git] / uuencode.c

diff --git a/uuencode.c b/uuencode.c
index 314eb92f3b5c2fa1c04a4d6dc0209781250b304e..b9e57e9934b19230e0439ded130178eac7e5eebe 100644 (file)
--- a/uuencode.c
+++ b/uuencode.c
@@ -1,3 +1,4 @@
+/* $OpenBSD: uuencode.c,v 1.25 2009/03/05 11:30:50 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
@@ -24,9 +25,20 @@
 
 #include "includes.h"
 
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <stdio.h>
+
 #include "xmalloc.h"
 #include "uuencode.h"
 
+/*
+ * Encode binary 'src' of length 'srclength', writing base64-encoded text
+ * to 'target' of size 'targsize'. Will always nul-terminate 'target'.
+ * Returns the number of bytes stored in 'target' or -1 on error (inc.
+ * 'targsize' too small).
+ */
 int
 uuencode(const u_char *src, u_int srclength,
     char *target, size_t targsize)
@@ -34,6 +46,11 @@ uuencode(const u_char *src, u_int srclength,
        return __b64_ntop(src, srclength, target, targsize);
 }
 
+/*
+ * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes.
+ * Will skip leading and trailing whitespace. Returns the number of bytes
+ * stored in 'target' or -1 on error (inc. targsize too small).
+ */
 int
 uudecode(const char *src, u_char *target, size_t targsize)
 {
@@ -57,9 +74,14 @@ uudecode(const char *src, u_char *target, size_t targsize)
 void
 dump_base64(FILE *fp, u_char *data, u_int len)
 {
-       char *buf = xmalloc(2*len);
+       char *buf;
        int i, n;
 
+       if (len > 65536) {
+               fprintf(fp, "dump_base64: len > 65536\n");
+               return;
+       }
+       buf = xmalloc(2*len);
        n = uuencode(data, len, buf, 2*len);
        for (i = 0; i < n; i++) {
                fprintf(fp, "%c", buf[i]);