From c40e4285071e7359bf7c63d2dcabebb434ecac96 Mon Sep 17 00:00:00 2001
From: Jeff Connelly <shellreef+git@gmail.com>
Date: Mon, 2 Jun 2008 21:44:40 -0700
Subject: [PATCH] In base64 decoder, print to stderr if there is a decoding
 error.

---
 base64.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/base64.c b/base64.c
index 8d2130e..b04718c 100644
--- a/base64.c
+++ b/base64.c
@@ -38,6 +38,7 @@ RCSID("$Id: base64.c,v 1.4 1999/12/02 16:58:45 joda Exp $");
 #endif
 #include <stdlib.h>
 #include <string.h>
+#include <stdio.h>
 #include "base64.h"
 
 static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
@@ -109,8 +110,11 @@ int base64_decode(const char *str, void *data)
     x = pos(p[1]);
     if(x >= 0)
       c += x;
-    else
+    else{
+      fprintf(stderr, "base64_decode: bad character '%c' (%.2x)\n",
+              p[1], p[1]);
       return -1;
+    }
     c*=64;
 
     if(p[2] == '=')
@@ -119,16 +123,22 @@ int base64_decode(const char *str, void *data)
       x = pos(p[2]);
       if(x >= 0)
 	c += x;
-      else
+      else{
+        fprintf(stderr, "base64_decode: bad character '%c' (%.2x)\n",
+              p[2], p[2]);
 	return -1;
+      }
     }
     c*=64;
 
     if(p[3] == '=')
       done++;
     else{
-      if(done)
+      if(done){
+        fprintf(stderr, "base64_decode: done, '%c' (%.2x)\n",
+            p[3], p[3]);
 	return -1;
+      }
       x = pos(p[3]);
       if(x >= 0)
 	c += x;
-- 
2.11.4.GIT