lib: base64 - Change MAX_BASE64_DECODED_SIZE() to be more exact

If the input has only full base64 blocks (is divisible by 4), there's no
need to add the extra +3.

diff --git a/src/lib/base64.h b/src/lib/base64.h
index 0576f62e67bfdc98bf19dd7a0d1cc5183ec21559..b497926f7fd7d0b335fd93b441e3de2a26afd9b1 100644 (file)
--- a/src/lib/base64.h
+++ b/src/lib/base64.h
@@ -28,5 +28,5 @@ bool base64_is_valid_char(char c);
        ((((size) + 2) / 3) * 4)
 /* max. buffer size required for base64_decode() */
 #define MAX_BASE64_DECODED_SIZE(size) \
-       ((size) / 4 * 3 + 3)
+       (((size) + 3) / 4 * 3)
 #endif