From: Daniel Stenberg <daniel@haxx.se>
Date: Sat, 3 Dec 2022 23:07:52 +0000 (+0100)
Subject: base64: better alloc size
X-Git-Tag: curl-7_87_0~71
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fa467a2fa98f6420db55c3b359fb0beed574bbbf;p=thirdparty%2Fcurl.git

base64: better alloc size

The previous algorithm allocated more bytes than necessary.

Suggested-by: xtonik on github
Fixes #10024
Closes #10025
---

diff --git a/lib/base64.c b/lib/base64.c
index 52654c2bc3..2760e7bbe8 100644
--- a/lib/base64.c
+++ b/lib/base64.c
@@ -192,7 +192,7 @@ static CURLcode base64_encode(const char *table64,
     return CURLE_OUT_OF_MEMORY;
 #endif
 
-  base64data = output = malloc(insize * 4 / 3 + 4);
+  base64data = output = malloc((insize + 2) / 3 * 4 + 1);
   if(!output)
     return CURLE_OUT_OF_MEMORY;