mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-25 21:35:41 +00:00
314 lines
8.9 KiB
C++
314 lines
8.9 KiB
C++
|
#ifndef SPROUT_CHECKSUM_SHA1_HPP
|
||
|
|
#define SPROUT_CHECKSUM_SHA1_HPP
|
||
|
|
|
||
|
|
#include <cstddef>
|
||
|
|
#include <cstdint>
|
||
|
|
#include <climits>
|
||
|
|
#include <type_traits>
|
||
|
|
#include <sprout/config.hpp>
|
||
|
|
#include <sprout/index_tuple.hpp>
|
||
|
|
#include <sprout/array.hpp>
|
||
|
|
#include <sprout/sub_array.hpp>
|
||
|
|
#include <sprout/fixed_container/functions.hpp>
|
||
|
|
#include <sprout/iterator/operation.hpp>
|
||
|
|
#include <sprout/iterator/bytes_iterator.hpp>
|
||
|
|
#include <sprout/range/algorithm/fixed/copy.hpp>
|
||
|
|
#include <sprout/operation/fixed/set.hpp>
|
||
|
|
|
||
|
|
namespace sprout {
|
||
|
|
static_assert(CHAR_BIT == 8, "CHAR_BIT == 8");
|
||
|
|
|
||
|
|
namespace detail {
|
||
|
|
SPROUT_CONSTEXPR inline std::uint32_t sha1_left_rotate(std::uint32_t x, std::size_t n) {
|
||
|
|
return (x << n) ^ (x >> (32 - n));
|
||
|
|
}
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
//
|
||
|
|
// sha1
|
||
|
|
//
|
||
|
|
class sha1 {
|
||
|
|
public:
|
||
|
|
typedef sprout::array<std::uint8_t, 20> value_type;
|
||
|
|
private:
|
||
|
|
sprout::array<std::uint32_t, 5> h_;
|
||
|
|
sprout::array<std::uint8_t, 64> block_;
|
||
|
|
std::size_t block_byte_index_;
|
||
|
|
std::size_t byte_count_;
|
||
|
|
private:
|
||
|
|
SPROUT_CONSTEXPR sha1(
|
||
|
|
sprout::array<std::uint32_t, 5> const& h,
|
||
|
|
sprout::array<std::uint8_t, 64> const& block,
|
||
|
|
std::size_t block_byte_index,
|
||
|
|
std::size_t byte_count
|
||
|
|
)
|
||
|
|
: h_(h)
|
||
|
|
, block_(block)
|
||
|
|
, block_byte_index_(block_byte_index)
|
||
|
|
, byte_count_(byte_count)
|
||
|
|
{}
|
||
|
|
SPROUT_CONSTEXPR std::uint32_t calc_w(std::size_t i) const {
|
||
|
|
return i < 16
|
||
|
|
? (block_[i * 4] << 24)
|
||
|
|
| (block_[i * 4 + 1] << 16)
|
||
|
|
| (block_[i * 4 + 2] << 8)
|
||
|
|
| (block_[i * 4 + 3])
|
||
|
|
: sprout::detail::sha1_left_rotate(
|
||
|
|
calc_w(i - 3) ^ calc_w(i - 8) ^ calc_w(i - 14) ^ calc_w(i - 16),
|
||
|
|
1
|
||
|
|
)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR sha1 process(
|
||
|
|
sprout::array<std::uint32_t, 5> const& h,
|
||
|
|
sprout::array<std::uint8_t, 64> const& block,
|
||
|
|
std::size_t block_byte_index,
|
||
|
|
std::size_t byte_count
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return block_byte_index != 64
|
||
|
|
? sha1(
|
||
|
|
h,
|
||
|
|
block,
|
||
|
|
block_byte_index,
|
||
|
|
byte_count
|
||
|
|
)
|
||
|
|
: sha1(
|
||
|
|
h,
|
||
|
|
block,
|
||
|
|
0,
|
||
|
|
byte_count
|
||
|
|
).process_block()
|
||
|
|
;
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR sha1 process_block_2(
|
||
|
|
std::uint32_t a,
|
||
|
|
std::uint32_t b,
|
||
|
|
std::uint32_t c,
|
||
|
|
std::uint32_t d,
|
||
|
|
std::uint32_t e,
|
||
|
|
std::size_t i,
|
||
|
|
std::uint32_t f,
|
||
|
|
std::uint32_t k
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return process_block_1(
|
||
|
|
sprout::detail::sha1_left_rotate(a, 5) + f + e + k + calc_w(i),
|
||
|
|
a,
|
||
|
|
sprout::detail::sha1_left_rotate(b, 30),
|
||
|
|
c,
|
||
|
|
d,
|
||
|
|
i + 1
|
||
|
|
);
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR sha1 process_block_1(
|
||
|
|
std::uint32_t a,
|
||
|
|
std::uint32_t b,
|
||
|
|
std::uint32_t c,
|
||
|
|
std::uint32_t d,
|
||
|
|
std::uint32_t e,
|
||
|
|
std::size_t i = 0
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return i < 80
|
||
|
|
? process_block_2(
|
||
|
|
a,
|
||
|
|
b,
|
||
|
|
c,
|
||
|
|
d,
|
||
|
|
e,
|
||
|
|
i,
|
||
|
|
i < 20 ? (b & c) | (~b & d)
|
||
|
|
: i < 40 ? b ^ c ^ d
|
||
|
|
: i < 60 ? (b & c) | (b & d) | (c & d)
|
||
|
|
: b ^ c ^ d
|
||
|
|
,
|
||
|
|
i < 20 ? 0x5A827999
|
||
|
|
: i < 40 ? 0x6ED9EBA1
|
||
|
|
: i < 60 ? 0x8F1BBCDC
|
||
|
|
: 0xCA62C1D6
|
||
|
|
)
|
||
|
|
: sha1(
|
||
|
|
sprout::array<std::uint32_t, 5>{{h_[0] + a, h_[1] + b, h_[2] + c, h_[3] + d, h_[4] + e}},
|
||
|
|
block_,
|
||
|
|
block_byte_index_,
|
||
|
|
byte_count_
|
||
|
|
)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR sha1 process_block() const {
|
||
|
|
return process_block_1(h_[0], h_[1], h_[2], h_[3], h_[4]);
|
||
|
|
}
|
||
|
|
template<typename Iterator, typename... Args>
|
||
|
|
SPROUT_CONSTEXPR typename std::enable_if<
|
||
|
|
sizeof...(Args) == 64,
|
||
|
|
sha1
|
||
|
|
>::type process_block_impl(
|
||
|
|
Iterator first,
|
||
|
|
Iterator last,
|
||
|
|
Args... args
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return first == last ? process(
|
||
|
|
h_,
|
||
|
|
sprout::make_array<std::uint8_t>(args...),
|
||
|
|
64,
|
||
|
|
byte_count_ + 64
|
||
|
|
)
|
||
|
|
: process(
|
||
|
|
h_,
|
||
|
|
sprout::make_array<std::uint8_t>(args...),
|
||
|
|
64,
|
||
|
|
byte_count_ + 64
|
||
|
|
).process_block_impl(first, last)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
template<typename Iterator, typename... Args>
|
||
|
|
SPROUT_CONSTEXPR typename std::enable_if<
|
||
|
|
sizeof...(Args) != 64,
|
||
|
|
sha1
|
||
|
|
>::type process_block_impl(
|
||
|
|
Iterator first,
|
||
|
|
Iterator last,
|
||
|
|
Args... args
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return first == last ? process(
|
||
|
|
h_,
|
||
|
|
sprout::get_fixed(sprout::range::fixed::copy(sprout::make_array<std::uint8_t>(args...), sprout::sub(block_, block_byte_index_))),
|
||
|
|
block_byte_index_ + sizeof...(Args),
|
||
|
|
byte_count_ + sizeof...(Args)
|
||
|
|
)
|
||
|
|
: block_byte_index_ + sizeof...(Args) == 64 ? process(
|
||
|
|
h_,
|
||
|
|
sprout::get_fixed(sprout::range::fixed::copy(sprout::make_array<std::uint8_t>(args...), sprout::sub(block_, block_byte_index_))),
|
||
|
|
block_byte_index_ + sizeof...(Args),
|
||
|
|
byte_count_ + sizeof...(Args)
|
||
|
|
).process_block_impl(first, last)
|
||
|
|
: process_block_impl(sprout::next(first), last, args..., *first)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
template<typename... Args>
|
||
|
|
SPROUT_CONSTEXPR typename std::enable_if<
|
||
|
|
sizeof...(Args) == 64,
|
||
|
|
sha1
|
||
|
|
>::type process_padding(
|
||
|
|
Args... args
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return process(
|
||
|
|
h_,
|
||
|
|
sprout::make_array<std::uint8_t>(args...),
|
||
|
|
64,
|
||
|
|
byte_count_ + 64
|
||
|
|
).process_padding()
|
||
|
|
;
|
||
|
|
}
|
||
|
|
template<typename... Args>
|
||
|
|
SPROUT_CONSTEXPR typename std::enable_if<
|
||
|
|
sizeof...(Args) != 64,
|
||
|
|
sha1
|
||
|
|
>::type process_padding(
|
||
|
|
Args... args
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return block_byte_index_ + sizeof...(Args) == 56 ? process(
|
||
|
|
h_,
|
||
|
|
sprout::get_fixed(sprout::range::fixed::copy(sprout::make_array<std::uint8_t>(args...), sprout::sub(block_, block_byte_index_))),
|
||
|
|
block_byte_index_ + sizeof...(Args),
|
||
|
|
byte_count_ + sizeof...(Args)
|
||
|
|
)
|
||
|
|
: block_byte_index_ + sizeof...(Args) == 64 ? process(
|
||
|
|
h_,
|
||
|
|
sprout::get_fixed(sprout::range::fixed::copy(sprout::make_array<std::uint8_t>(args...), sprout::sub(block_, block_byte_index_))),
|
||
|
|
block_byte_index_ + sizeof...(Args),
|
||
|
|
byte_count_ + sizeof...(Args)
|
||
|
|
).process_padding()
|
||
|
|
: process_padding(args..., static_cast<std::uint8_t>(0))
|
||
|
|
;
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR sha1 process_append() const {
|
||
|
|
return process(
|
||
|
|
h_,
|
||
|
|
sprout::get_fixed(sprout::range::fixed::copy(
|
||
|
|
sprout::array<std::uint8_t, 8>{{
|
||
|
|
static_cast<std::uint8_t>(0),
|
||
|
|
static_cast<std::uint8_t>(0),
|
||
|
|
static_cast<std::uint8_t>(0),
|
||
|
|
static_cast<std::uint8_t>(0),
|
||
|
|
static_cast<std::uint8_t>((byte_count_ * 8 >> 24) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((byte_count_ * 8 >> 16) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((byte_count_ * 8 >> 8) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((byte_count_ * 8) & 0xFF)
|
||
|
|
}},
|
||
|
|
sprout::sub(block_, block_byte_index_)
|
||
|
|
)),
|
||
|
|
block_byte_index_ + 8,
|
||
|
|
byte_count_ + 8
|
||
|
|
);
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR value_type make_value() const {
|
||
|
|
return value_type{{
|
||
|
|
static_cast<std::uint8_t>((h_[0] >> 24) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[0] >> 16) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[0] >> 8) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[0]) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[1] >> 24) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[1] >> 16) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[1] >> 8) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[1]) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[2] >> 24) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[2] >> 16) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[2] >> 8) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[2]) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[3] >> 24) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[3] >> 16) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[3] >> 8) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[3]) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[4] >> 24) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[4] >> 16) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[4] >> 8) & 0xFF),
|
||
|
|
static_cast<std::uint8_t>((h_[4]) & 0xFF)
|
||
|
|
}};
|
||
|
|
}
|
||
|
|
public:
|
||
|
|
SPROUT_CONSTEXPR sha1()
|
||
|
|
: h_{{0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0}}
|
||
|
|
, block_{{}}
|
||
|
|
, block_byte_index_()
|
||
|
|
, byte_count_()
|
||
|
|
{}
|
||
|
|
SPROUT_CONSTEXPR sha1 process_byte(std::uint8_t byte) const {
|
||
|
|
return process(
|
||
|
|
h_,
|
||
|
|
sprout::fixed::set(block_, block_.begin() + block_byte_index_, byte),
|
||
|
|
block_byte_index_ + 1,
|
||
|
|
byte_count_ + 1
|
||
|
|
);
|
||
|
|
}
|
||
|
|
template<typename Iterator>
|
||
|
|
SPROUT_CONSTEXPR sha1 process_block(Iterator bytes_begin, Iterator bytes_end) const {
|
||
|
|
return process_block_impl(
|
||
|
|
sprout::make_bytes_iterator(bytes_begin),
|
||
|
|
sprout::make_bytes_iterator(bytes_end)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
template<typename Iterator>
|
||
|
|
SPROUT_CONSTEXPR sha1 process_bytes(Iterator buffer, std::size_t byte_count) const {
|
||
|
|
return process_block(buffer, sprout::next(buffer, byte_count));
|
||
|
|
}
|
||
|
|
template<typename Range>
|
||
|
|
SPROUT_CONSTEXPR sha1 process_range(Range const& bytes_range) const {
|
||
|
|
return process_block(sprout::begin(bytes_range), sprout::end(bytes_range));
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR value_type checksum() const {
|
||
|
|
return process_byte(0x80).process_padding().process_append().make_value();
|
||
|
|
}
|
||
|
|
SPROUT_CONSTEXPR value_type operator()() const {
|
||
|
|
return checksum();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
} // namespace sprout
|
||
|
|
|
||
|
|
#endif // #ifndef SPROUT_CHECKSUM_SHA1_HPP
|