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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "components/variations/hashing.h"
- #include <string.h>
- #include "base/hash/sha1.h"
- #include "base/sys_byteorder.h"
- namespace variations {
- uint32_t HashName(base::StringPiece name) {
- // SHA-1 is designed to produce a uniformly random spread in its output space,
- // even for nearly-identical inputs.
- unsigned char sha1_hash[base::kSHA1Length];
- base::SHA1HashBytes(reinterpret_cast<const unsigned char*>(name.data()),
- name.size(), sha1_hash);
- uint32_t bits;
- static_assert(sizeof(bits) < sizeof(sha1_hash), "more data required");
- memcpy(&bits, sha1_hash, sizeof(bits));
- return base::ByteSwapToLE32(bits);
- }
- } // namespace variations
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