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sha2.nim
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sha2.nim
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# NOTE: common sha-2 functions
func rotateRight(x: uint32, n: int): uint32 {.inline.} =
return (x shr n) or (x shl (32 - n))
func rotateRight(x: uint64, n: int): uint64 {.inline.} =
return (x shr n) or (x shl (64 - n))
func choice(x, y, z: uint32): uint32 {.inline.} =
return (x and y) xor ((not x) and z)
func choice(x, y, z: uint64): uint64 {.inline.} =
return (x and y) xor ((not x) and z)
func majority(x, y, z: uint32): uint32 {.inline.} =
return (x and y) xor (x and z) xor (y and z)
func majority(x, y, z: uint64): uint64 {.inline.} =
return (x and y) xor (x and z) xor (y and z)
func sigma0(x: uint32): uint32 {.inline.} =
return rotateRight(x, 7) xor rotateRight(x, 18) xor (x shr 3)
func sigma0(x: uint64): uint64 {.inline.} =
return rotateRight(x, 1) xor rotateRight(x, 8) xor (x shr 7)
func sigma1(x: uint32): uint32 {.inline.} =
return rotateRight(x, 17) xor rotateRight(x, 19) xor (x shr 10)
func sigma1(x: uint64): uint64 {.inline.} =
return rotateRight(x, 19) xor rotateRight(x, 61) xor (x shr 6)
func Sigma0(x: uint32): uint32 {.inline.} =
return rotateRight(x, 2) xor rotateRight(x, 13) xor rotateRight(x, 22)
func Sigma0(x: uint64): uint64 {.inline.} =
return rotateRight(x, 28) xor rotateRight(x, 34) xor rotateRight(x, 39)
func Sigma1(x: uint32): uint32 {.inline.} =
return rotateRight(x, 6) xor rotateRight(x, 11) xor rotateRight(x, 25)
func Sigma1(x: uint64): uint64 {.inline.} =
return rotateRight(x, 14) xor rotateRight(x, 18) xor rotateRight(x, 41)