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11 lines
351 B
Plaintext
11 lines
351 B
Plaintext
Salsa20_expansion : {a} (a >= 1, 2 >= a) => ([16*a][8], [16][8]) -> [64][8]
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Salsa20_expansion(k, n) = z
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where
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[s0, s1, s2, s3] = if (`a == 2) then split("expand 32-byte k")
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else split("expand 16-byte k")
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k1 = take`{16}(k#zero)
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k2 = drop`{16}(zero#k)
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x = s0 # k1 # s1 # n # s2 # k2 # s3
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z = x
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