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SHA256.jl
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SHA256.jl
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const k = [0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2]
function sha256(message::Vector{<:Unsigned})
bits = vcat(digits!.(BitVector.(undef, Int.(8sizeof.(message))), message, base=2)...)
L = length(bits)
push!(bits, true)
append!(bits, falses(-rem(length(bits) + 64, 512, RoundUp)))
append!(bits, reverse!(digits!(BitVector(undef, 64), L, base=2)))
message32 = reinterpret(UInt32, bits.chunks)
# Initialize hash values:
hash = eltype(message32)[0x6a09e667,
0xbb67ae85,
0x3c6ef372,
0xa54ff53a,
0x510e527f,
0x9b05688c,
0x1f83d9ab,
0x5be0cd19]
# Create message schedule array:
w = similar(hash, 64)
for block in Iterators.partition(eachindex(message32), 16)
w[1:16] = message32[block]
for i = 17:64
s0 = bitrotate(w[i-15], -7) ⊻ bitrotate(w[i-15], -18) ⊻ (w[i-15] >> 3)
s1 = bitrotate(w[i- 2], -17) ⊻ bitrotate(w[i- 2], -19) ⊻ (w[i- 2] >> 10)
w[i] = w[i-16] + s0 + w[i-7] + s1
end
# Initialize working variables to current hash value:
a, b, c, d, e, f, g, h = hash
for i = 1:64
S1 = bitrotate(e, -6) ⊻ bitrotate(e, -11) ⊻ bitrotate(e, -25)
ch = (e & f) ⊻ (~e & g)
@inbounds temp1 = h + S1 + ch + k[i] + w[i]
S0 = bitrotate(a, -2) ⊻ bitrotate(a, -13) ⊻ bitrotate(a, -22)
maj = (a & b) ⊻ (a & c) ⊻ (b & c)
temp2 = S0 + maj
h = g
g = f
f = e
e = d + temp1
d = c
c = b
b = a
a = temp1 + temp2
end
hash .+= a, b, c, d, e, f, g, h
end
return hash
end
sha256(message::String) = sha256(Vector{UInt8}(message))