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$NetBSD: patch-CVE-2012-3461-ab,v 1.1 2012/08/09 10:06:47 drochner Exp $
--- src/b64.h.orig 2008-05-27 12:35:28.000000000 +0000
+++ src/b64.h
@@ -20,6 +20,19 @@
#ifndef __B64_H__
#define __B64_H__
+#include <stdlib.h>
+
+/* Base64 encodes blocks of this many bytes: */
+#define OTRL_B64_DECODED_LEN 3
+/* into blocks of this many bytes: */
+#define OTRL_B64_ENCODED_LEN 4
+
+/* An encoded block of length encoded_len can turn into a maximum of
+ * this many decoded bytes: */
+#define OTRL_B64_MAX_DECODED_SIZE(encoded_len) \
+ (((encoded_len + OTRL_B64_ENCODED_LEN - 1) / OTRL_B64_ENCODED_LEN) \
+ * OTRL_B64_DECODED_LEN)
+
/*
* base64 encode data. Insert no linebreaks or whitespace.
*
@@ -33,8 +46,9 @@ size_t otrl_base64_encode(char *base64da
* base64 decode data. Skip non-base64 chars, and terminate at the
* first '=', or the end of the buffer.
*
- * The buffer data must contain at least (base64len / 4) * 3 bytes of
- * space. This function will return the number of bytes actually used.
+ * The buffer data must contain at least ((base64len+3) / 4) * 3 bytes
+ * of space. This function will return the number of bytes actually
+ * used.
*/
size_t otrl_base64_decode(unsigned char *data, const char *base64data,
size_t base64len);
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