Align security data correctly

[wimlib] / src / security.c

diff --git a/src/security.c b/src/security.c
index b30ffc6522247421551f0d4e260ec1278c54dded..2e83d0e966199aa44b3a14606ee9e38b781cb9c9 100644 (file)
--- a/src/security.c
+++ b/src/security.c
@@ -168,8 +168,10 @@ u8 *write_security_data(const struct wim_security_data *sd, u8 *p)
        DEBUG("Writing security data (total_length = %"PRIu32", num_entries "
              "= %"PRIu32")", sd->total_length, sd->num_entries);
 
+       u32 aligned_length = (sd->total_length + 7) & ~7;
+
        u8 *orig_p = p;
-       p = put_u32(p, sd->total_length);
+       p = put_u32(p, aligned_length);
        p = put_u32(p, sd->num_entries);
 
        for (u32 i = 0; i < sd->num_entries; i++)
@@ -179,6 +181,7 @@ u8 *write_security_data(const struct wim_security_data *sd, u8 *p)
                p = put_bytes(p, sd->sizes[i], sd->descriptors[i]);
 
        wimlib_assert(p - orig_p == sd->total_length);
+       p = put_zeroes(p, aligned_length - sd->total_length);
 
        DEBUG("Successfully wrote security data.");
        return p;