lib: Fix MAX_BASE64_ENCODED_SIZE macro

diff --git a/src/lib/base64.h b/src/lib/base64.h
index dc3aaa35ba265eb8d201416c2b706d2dac4e4c8a..511b1f5c3fcaf8e15fb090037cd292f247474a34 100644 (file)
--- a/src/lib/base64.h
+++ b/src/lib/base64.h
@@ -25,7 +25,7 @@ bool base64_is_valid_char(char c);
 
 /* max. buffer size required for base64_encode() */
 #define MAX_BASE64_ENCODED_SIZE(size) \
-       ((size) / 3 * 4 + 2+2)
+       (((size) / 3 + ((size) % 3 > 0)) * 4)
 /* max. buffer size required for base64_decode() */
 #define MAX_BASE64_DECODED_SIZE(size) \
        ((size) / 4 * 3 + 3)