144 lines
3.3 KiB
Lua
144 lines
3.3 KiB
Lua
local bench = script and require(script.Parent.bench_support) or require("bench_support")
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function test()
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local band = bit32.band
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local bnot = bit32.bnot
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local bxor = bit32.bxor
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local bor = bit32.bor
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local rrotate = bit32.rrotate
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local rshift = bit32.rshift
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local primes =
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{
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
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0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
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0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
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0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
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0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
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0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
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}
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local function toHex(str)
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local result = str:gsub('.', function (char)
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return string.format("%02x", char:byte())
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end)
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return result
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end
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local function toBytes(value, length)
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local str = ""
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for i = 1, length do
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local rem = value % 256
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str = string.char(rem) .. str
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value = (value - rem) / 256
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end
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return str
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end
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local function digestBlock(msg, i, hash, digest)
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for j = 1, 16 do
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local offset = i + (j - 1) * 4
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local a, b, c, d = string.byte(msg, offset, offset + 3)
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digest[j] = ((a * 256 + b) * 256 + c) * 256 + d
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end
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for j = 17, 64 do
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local v = digest[j - 15]
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local s0 = bxor(rrotate(v, 7), rrotate(v, 18), rshift(v, 3))
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v = digest[j - 2]
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digest[j] = digest[j - 16] + s0 + digest[j - 7] + bxor(rrotate(v, 17), rrotate(v, 19), rshift(v, 10))
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end
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local a, b, c, d, e, f, g, h = table.unpack(hash)
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for i = 1, 64 do
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local s0 = bxor(rrotate(a, 2), rrotate(a, 13), rrotate(a, 22))
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local maj = bxor(band(a, b), band(a, c), band(b, c))
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local t2 = s0 + maj
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local s1 = bxor(rrotate(e, 6), rrotate(e, 11), rrotate(e, 25))
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local ch = bxor(band(e, f), band(bnot(e), g))
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local t1 = h + s1 + ch + primes[i] + digest[i]
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h, g, f, e, d, c, b, a = g, f, e, d + t1, c, b, a, t1 + t2
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end
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hash[1] = bor(hash[1] + a, 0)
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hash[2] = bor(hash[2] + b, 0)
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hash[3] = bor(hash[3] + c, 0)
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hash[4] = bor(hash[4] + d, 0)
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hash[5] = bor(hash[5] + e, 0)
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hash[6] = bor(hash[6] + f, 0)
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hash[7] = bor(hash[7] + g, 0)
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hash[8] = bor(hash[8] + h, 0)
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end
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local function sha256(msg)
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do
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local extra = 64 - ((#msg + 9) % 64)
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local len = toBytes(8 * #msg, 8)
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msg = msg .. '\128' .. string.rep('\0', extra) .. len
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assert(#msg % 64 == 0)
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end
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local hash =
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{
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0x6a09e667,
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0xbb67ae85,
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0x3c6ef372,
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0xa54ff53a,
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0x510e527f,
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0x9b05688c,
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0x1f83d9ab,
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0x5be0cd19,
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}
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local digest = {}
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for i = 1, #msg, 64 do
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digestBlock(msg, i, hash, digest)
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end
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local result = ""
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for i = 1, 8 do
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local value = hash[i]
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result = result .. toBytes(value, 4)
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end
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return toHex(result)
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end
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local input = string.rep(".", 1e3)
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local ts0 = os.clock()
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for i = 1, 100 do
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sha256(input)
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end
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local ts1 = os.clock()
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return ts1 - ts0
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end
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bench.runCode(test, "sha256")
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