diff options
Diffstat (limited to 'chromium/base/hash/md5_constexpr_internal.h')
-rw-r--r-- | chromium/base/hash/md5_constexpr_internal.h | 62 |
1 files changed, 55 insertions, 7 deletions
diff --git a/chromium/base/hash/md5_constexpr_internal.h b/chromium/base/hash/md5_constexpr_internal.h index b705bc8ad05..5c9c004455e 100644 --- a/chromium/base/hash/md5_constexpr_internal.h +++ b/chromium/base/hash/md5_constexpr_internal.h @@ -281,15 +281,63 @@ struct MD5CE { return IntermediateDataToMD5Digest(ProcessMessage(data, n)); } - static constexpr uint64_t Hash64(const char* data, uint32_t n) { - IntermediateData intermediate = ProcessMessage(data, n); - return (static_cast<uint64_t>(SwapEndian(intermediate.a)) << 32) | - static_cast<uint64_t>(SwapEndian(intermediate.b)); + static constexpr uint64_t Hash64(const char* message, uint32_t n) { + const uint32_t m = GetPaddedMessageLength(n); + IntermediateData intermediate0 = kInitialIntermediateData; + for (uint32_t offset = 0; offset < m; offset += 64) { + RoundData data = { + GetPaddedMessageWord(message, n, m, offset), + GetPaddedMessageWord(message, n, m, offset + 4), + GetPaddedMessageWord(message, n, m, offset + 8), + GetPaddedMessageWord(message, n, m, offset + 12), + GetPaddedMessageWord(message, n, m, offset + 16), + GetPaddedMessageWord(message, n, m, offset + 20), + GetPaddedMessageWord(message, n, m, offset + 24), + GetPaddedMessageWord(message, n, m, offset + 28), + GetPaddedMessageWord(message, n, m, offset + 32), + GetPaddedMessageWord(message, n, m, offset + 36), + GetPaddedMessageWord(message, n, m, offset + 40), + GetPaddedMessageWord(message, n, m, offset + 44), + GetPaddedMessageWord(message, n, m, offset + 48), + GetPaddedMessageWord(message, n, m, offset + 52), + GetPaddedMessageWord(message, n, m, offset + 56), + GetPaddedMessageWord(message, n, m, offset + 60)}; + IntermediateData intermediate1 = intermediate0; + for (uint32_t i = 0; i < 64; ++i) + intermediate1 = ApplyStep(i, data, intermediate1); + intermediate0 = Add(intermediate0, intermediate1); + } + return (static_cast<uint64_t>(SwapEndian(intermediate0.a)) << 32) | + static_cast<uint64_t>(SwapEndian(intermediate0.b)); } - static constexpr uint32_t Hash32(const char* data, uint32_t n) { - IntermediateData intermediate = ProcessMessage(data, n); - return SwapEndian(intermediate.a); + static constexpr uint32_t Hash32(const char* message, uint32_t n) { + const uint32_t m = GetPaddedMessageLength(n); + IntermediateData intermediate0 = kInitialIntermediateData; + for (uint32_t offset = 0; offset < m; offset += 64) { + RoundData data = { + GetPaddedMessageWord(message, n, m, offset), + GetPaddedMessageWord(message, n, m, offset + 4), + GetPaddedMessageWord(message, n, m, offset + 8), + GetPaddedMessageWord(message, n, m, offset + 12), + GetPaddedMessageWord(message, n, m, offset + 16), + GetPaddedMessageWord(message, n, m, offset + 20), + GetPaddedMessageWord(message, n, m, offset + 24), + GetPaddedMessageWord(message, n, m, offset + 28), + GetPaddedMessageWord(message, n, m, offset + 32), + GetPaddedMessageWord(message, n, m, offset + 36), + GetPaddedMessageWord(message, n, m, offset + 40), + GetPaddedMessageWord(message, n, m, offset + 44), + GetPaddedMessageWord(message, n, m, offset + 48), + GetPaddedMessageWord(message, n, m, offset + 52), + GetPaddedMessageWord(message, n, m, offset + 56), + GetPaddedMessageWord(message, n, m, offset + 60)}; + IntermediateData intermediate1 = intermediate0; + for (uint32_t i = 0; i < 64; ++i) + intermediate1 = ApplyStep(i, data, intermediate1); + intermediate0 = Add(intermediate0, intermediate1); + } + return SwapEndian(intermediate0.a); } }; |