| // Copyright 2019 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. |
| |
| #ifndef BASE_HASH_MD5_CONSTEXPR_H_ |
| #define BASE_HASH_MD5_CONSTEXPR_H_ |
| |
| #include "base/hash/md5.h" |
| #include "base/hash/md5_constexpr_internal.h" |
| |
| namespace base { |
| |
| // An constexpr implementation of the MD5 hash function. This is no longer |
| // considered cryptographically secure, but it is useful as a string hashing |
| // primitive. |
| // |
| // This is not the most efficient implementation, so it is not intended to be |
| // used at runtime. If you do attempt to use it at runtime you will see |
| // errors about missing symbols. |
| |
| // Calculates the MD5 digest of the provided data. When passing |string| with |
| // no explicit length the terminating null will not be processed. |
| constexpr MD5Digest MD5SumConstexpr(const char* string); |
| constexpr MD5Digest MD5SumConstexpr(const char* data, uint32_t length); |
| |
| // Calculates the first 32/64 bits of the MD5 digest of the provided data, |
| // returned as a uint32_t/uint64_t. When passing |string| with no explicit |
| // length the terminating null will not be processed. This abstracts away |
| // endianness so that the integer will read as the first 4 or 8 bytes of the |
| // MD5 sum, ensuring that the following outputs are equivalent for |
| // convenience: |
| // |
| // printf("%08x\n", MD5HashConstexpr32("foo")); |
| // |
| // MD5Digest d = MD5SumConstexpr("foo"); |
| // printf("%02x%02x%02x%02x\n", d.a[0], d.a[1], d.a[2], d.a[3]); |
| constexpr uint64_t MD5Hash64Constexpr(const char* string); |
| constexpr uint64_t MD5Hash64Constexpr(const char* data, uint32_t length); |
| constexpr uint32_t MD5Hash32Constexpr(const char* string); |
| constexpr uint32_t MD5Hash32Constexpr(const char* data, uint32_t length); |
| |
| } // namespace base |
| |
| #endif // BASE_HASH_MD5_CONSTEXPR_H_ |