From: Eugene Syromiatnikov <esyr@openssl.org>
Date: Fri, 25 Jul 2025 17:00:22 +0000 (+0200)
Subject: crypto/bio/bio_print.c: correctly print 0X prefix for X conversion
X-Git-Tag: openssl-3.6.0-alpha1~44
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=96e021dffff9a5382e3b9d68f55a0e538ae0dea1;p=thirdparty%2Fopenssl.git

crypto/bio/bio_print.c: correctly print 0X prefix for X conversion

Per [1]:

   For x or X conversion specifiers, a non-zero result shall have 0x (or 0X)
   prefixed to it.

[1] https://pubs.opengroup.org/onlinepubs/9799919799//functions/printf.html

Signed-off-by: Eugene Syromiatnikov <esyr@openssl.org>

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28177)
---

diff --git a/crypto/bio/bio_print.c b/crypto/bio/bio_print.c
index f6db6d3bfc1..1a0b2685018 100644
--- a/crypto/bio/bio_print.c
+++ b/crypto/bio/bio_print.c
@@ -473,7 +473,7 @@ fmtint(char **sbuffer,
         if (base == 8)
             prefix = "0";
         if (base == 16)
-            prefix = "0x";
+            prefix = flags & DP_F_UP ? "0X" : "0x";
     }
     if (flags & DP_F_UP)
         caps = 1;