check libsodium sha256 checksum

res/libsodium/buildlibsodium.sh

@@ -29,6 +29,18 @@ if [ ! -f libsodium-1.0.18.tar.gz ]; then
     exit 1
 fi
 
+# Sha256 checksum for ibsodium-1.0.18.tar.gz
+EXPECTED_CHECKSUM="6f504490b342a4f8a4c4a02fc9b866cbef8622d5df4e5452b46be121e46636c1"
+
+# Check if the checksum matchs
+echo "Checking SHA256 Checksum for libsodium $VERSION"
+ACTUAL_CHECKSUM=$(sha256sum libsodium-1.0.18.tar.gz | awk '{ print $1 }')
+
+if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]; then
+    echo "Error: The checksum of libsodium does not match the expected checksum. "
+    exit 1
+fi
+
 if [ ! -d libsodium-1.0.18 ]; then
     echo "Unpacking libsodium $VERSION"
     tar xf libsodium-1.0.18.tar.gz