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Generate SHA256 constants instead of storing them

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Miguel Oliveira 2022-03-10 16:51:16 -03:00
parent ce3943e243
commit 2668139d96
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GPG key ID: 2C2BE789E1377025
1 changed files with 12 additions and 17 deletions
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sha256.lua
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@ -12,24 +12,19 @@ local bnot = bit32.bnot
local band = bit32.band local band = bit32.band
local unpack = unpack or table.unpack local unpack = unpack or table.unpack
local K = { local function primes(n, exp)
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, local out = {}
0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, local p = 2
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, for i = 1, n do
0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, out[i] = bxor(p ^ exp % 1 * 2 ^ 32)
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, repeat p = p + 1 until 2 ^ p % p == 2
0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, end
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, return out
0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, end
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
}
local h0 = { local K = primes(64, 1 / 3)
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19, local h0 = primes(8, 1 / 2)
}
local function compress(h, w) local function compress(h, w)
local h0, h1, h2, h3, h4, h5, h6, h7 = unpack(h) local h0, h1, h2, h3, h4, h5, h6, h7 = unpack(h)