Tiny optimization in MDx_HashFunction::final_result

Typically not a bottleneck but this shows up in XMSS profiling

1 files changed, 1 insertions, 2 deletions

diff --git a/src/lib/hash/mdx_hash/mdx_hash.cpp b/src/lib/hash/mdx_hash/mdx_hash.cpp
index 8c668874a..7d163dbfb 100644
--- a/src/lib/hash/mdx_hash/mdx_hash.cpp
+++ b/src/lib/hash/mdx_hash/mdx_hash.cpp
@@ -71,9 +71,8 @@ void MDx_HashFunction::add_data(const uint8_t input[], size_t length)
 */
 void MDx_HashFunction::final_result(uint8_t output[])
    {
+   clear_mem(&m_buffer[m_position], m_buffer.size() - m_position);
    m_buffer[m_position] = (BIG_BIT_ENDIAN ? 0x80 : 0x01);
-   for(size_t i = m_position+1; i != m_buffer.size(); ++i)
-      m_buffer[i] = 0;
 
    if(m_position >= m_buffer.size() - COUNT_SIZE)
       {