From e219727d402cbe39d44e2d8d149bf893b1462403 Mon Sep 17 00:00:00 2001
From: rumtid <liwei.jiang@seafile.com>
Date: Sun, 16 Oct 2022 12:21:56 +0800
Subject: [PATCH] Fix an error check in utils (#1426)

---
 src/utils/utils-win.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/utils/utils-win.cpp b/src/utils/utils-win.cpp
index 52bc8b419..4a7d099a3 100644
--- a/src/utils/utils-win.cpp
+++ b/src/utils/utils-win.cpp
@@ -283,7 +283,9 @@ char *b64encode(const char *input)
 {
     char buf[32767] = {0};
     DWORD retlen = 32767;
-    CryptBinaryToString((BYTE*) input, strlen(input), CRYPT_STRING_BASE64 | CRYPT_STRING_NOCRLF, buf, &retlen);
+    if (!CryptBinaryToString((BYTE*) input, strlen(input), CRYPT_STRING_BASE64 | CRYPT_STRING_NOCRLF, buf, &retlen)) {
+        return NULL;
+    }
     return strdup(buf);
 }
 
@@ -307,8 +309,10 @@ std::string getLocalPipeName(const char *pipe_name)
     } else {
         std::string ret(pipe_name);
         char *encoded = b64encode(user_name_buf);
-        ret += encoded;
-        free(encoded);
+        if (encoded) {
+            ret += encoded;
+            free(encoded);
+        }
         return ret;
     }
 }