diff --git a/programs/hash/sha2sum.c b/programs/hash/sha2sum.c
new file mode 100644
index 0000000..c0d42a8
--- /dev/null
+++ b/programs/hash/sha2sum.c
@@ -0,0 +1,156 @@
+/*
+ *  sha2sum demonstration program
+ *
+ *  Copyright (C) 2006-2007  Christophe Devine
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _CRT_SECURE_NO_DEPRECATE
+#define _CRT_SECURE_NO_DEPRECATE 1
+#endif
+
+#include <string.h>
+#include <stdio.h>
+
+#include "xyssl/sha2.h"
+
+static int sha2_wrapper( char *filename, unsigned char *sum )
+{
+    int ret = sha2_file( filename, sum, 0 );
+
+    if( ret == 1 )
+        fprintf( stderr, "failed to open: %s\n", filename );
+
+    if( ret == 2 )
+        fprintf( stderr, "failed to read: %s\n", filename );
+
+    return( ret );
+}
+
+static int sha2_print( char *filename )
+{
+    int i;
+    unsigned char sum[32];
+
+    if( sha2_wrapper( filename, sum ) != 0 )
+        return( 1 );
+
+    for( i = 0; i < 32; i++ )
+        printf( "%02x", sum[i] );
+
+    printf( "  %s\n", filename );
+    return( 0 );
+}
+
+static int sha2_check( char *filename )
+{
+    int i;
+    size_t n;
+    FILE *f;
+    int nb_err1, nb_err2;
+    int nb_tot1, nb_tot2;
+    unsigned char sum[32];
+    char buf[65], line[1024];
+
+    if( ( f = fopen( filename, "rb" ) ) == NULL )
+    {
+        printf( "failed to open: %s\n", filename );
+        return( 1 );
+    }
+
+    nb_err1 = nb_err2 = 0;
+    nb_tot1 = nb_tot2 = 0;
+
+    memset( line, 0, sizeof( line ) );
+
+    n = sizeof( line );
+
+    while( fgets( line, n - 1, f ) != NULL )
+    {
+        n = strlen( line );
+
+        if( n < 68 )
+            continue;
+
+        if( line[64] != ' ' || line[65] != ' ' )
+            continue;
+
+        if( line[n - 1] == '\n' ) { n--; line[n] = '\0'; }
+        if( line[n - 1] == '\r' ) { n--; line[n] = '\0'; }
+
+        nb_tot1++;
+
+        if( sha2_wrapper( line + 66, sum ) != 0 )
+        {
+            nb_err1++;
+            continue;
+        }
+
+        nb_tot2++;
+
+        for( i = 0; i < 32; i++ )
+            sprintf( buf + i * 2, "%02x", sum[i] );
+
+        if( memcmp( line, buf, 64 ) != 0 )
+        {
+            nb_err2++;
+            fprintf( stderr, "wrong checksum: %s\n", line + 66 );
+        }
+
+        n = sizeof( line );
+    }
+
+    if( nb_err1 != 0 )
+    {
+        printf( "WARNING: %d (out of %d) input files could "
+                "not be read\n", nb_err1, nb_tot1 );
+    }
+
+    if( nb_err2 != 0 )
+    {
+        printf( "WARNING: %d (out of %d) computed checksums did "
+                "not match\n", nb_err2, nb_tot2 );
+    }
+
+    return( nb_err1 != 0 || nb_err2 != 0 );
+}
+
+int main( int argc, char *argv[] )
+{
+    int ret, i;
+
+    if( argc == 1 )
+    {
+        printf( "print mode:  sha2sum <file> <file> ...\n" );
+        printf( "check mode:  sha2sum -c <checksum file>\n" );
+
+#ifdef WIN32
+        printf( "\n  Press Enter to exit this program.\n" );
+        fflush( stdout ); getchar();
+#endif
+
+        return( 1 );
+    }
+
+    if( argc == 3 && strcmp( "-c", argv[1] ) == 0 )
+        return( sha2_check( argv[2] ) );
+
+    ret = 0;
+    for( i = 1; i < argc; i++ )
+        ret |= sha2_print( argv[i] );
+
+    return( ret );
+}