[reactos] 09/21: [MSGINA] Fix copying the TokenSource string

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=2800837dc0b6783d6c4fb…

commit 2800837dc0b6783d6c4fb61db2ce6e51199d3c47
Author:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
AuthorDate: Sat Apr 27 18:42:21 2019 +0200
Commit:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
CommitDate: Sat Jul 20 13:56:18 2019 +0200

    [MSGINA] Fix copying the TokenSource string
    
    TOKEN_SOURCE::SourceString is an 8 char non-null-terminated string. Copy it as such.
    
    Fixes GCC 8 warning:
    dll/win32/msgina/lsa.c:195:5: error: 'strncpy' output truncated before
terminating nul copying 8 bytes from a string of the same length
[-Werror=stringop-truncation]
         strncpy(TokenSource.SourceName, "User32  ",
sizeof(TokenSource.SourceName));
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---
 dll/win32/msgina/lsa.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dll/win32/msgina/lsa.c b/dll/win32/msgina/lsa.c
index 16eaf68fdd3..dca3cc0e1d8 100644
--- a/dll/win32/msgina/lsa.c
+++ b/dll/win32/msgina/lsa.c
@@ -48,6 +48,8 @@ ConnectToLsa(
     return Status;
 }
 
+static const CHAR User32TokenSourceName[] = "User32  ";
+C_ASSERT(sizeof(User32TokenSourceName) == RTL_FIELD_SIZE(TOKEN_SOURCE, SourceName) + 1);
 
 NTSTATUS
 MyLogonUser(
@@ -192,7 +194,7 @@ MyLogonUser(
                                         SE_GROUP_ENABLED_BY_DEFAULT;
 
     /* Set the token source */
-    strncpy(TokenSource.SourceName, "User32  ",
sizeof(TokenSource.SourceName));
+    RtlCopyMemory(TokenSource.SourceName, User32TokenSourceName,
sizeof(TokenSource.SourceName));
     AllocateLocallyUniqueId(&TokenSource.SourceIdentifier);
 
     Status = LsaLogonUser(LsaHandle,