Add "scrypt" to third_party for secure password hashes

third_party/scrypt/sysendian.h

+/*
+ * Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license.
+ *
+ * Some functions commonly found in sys/endian.h, a header file not available
+ * on Windows platforms.
+ */
+
+#ifndef _SCRYPT_SYSENDIAN_H
+#define _SCRYPT_SYSENDIAN_H
+
+static __inline void be32enc(void *buf, uint32_t u)
+{
+  uint8_t *p = (uint8_t *)buf;
+  p[0] = (uint8_t)((u >> 24) & 0xff);
+  p[1] = (uint8_t)((u >> 16) & 0xff);
+  p[2] = (uint8_t)((u >> 8) & 0xff);
+  p[3] = (uint8_t)(u & 0xff);
+}
+
+static __inline void le32enc(void *buf, uint32_t u)
+{
+  uint8_t *p = (uint8_t *)buf;
+  p[0] = (uint8_t)(u & 0xff);
+  p[1] = (uint8_t)((u >> 8) & 0xff);
+  p[2] = (uint8_t)((u >> 16) & 0xff);
+  p[3] = (uint8_t)((u >> 24) & 0xff);
+}
+
+static __inline uint32_t be32dec(const void *buf)
+{
+  const uint8_t *p = (const uint8_t *)buf;
+  return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+static __inline uint32_t le32dec(const void *buf)
+{
+  const uint8_t *p = (const uint8_t *)buf;
+  return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
+}
+
+#endif  // _SCRYPT_SYSENDIAN_H