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crypto/sha3: pull in latest keccak from go crypto (45% speed increase)

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This commit is contained in:
Péter Szilágyi
2015-06-03 12:00:39 +03:00
parent 9085b10508
commit 14e7192d9c
2 changed files with 403 additions and 167 deletions
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19
crypto/sha3/sha3.go
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@ -38,13 +38,10 @@ const stateSize = laneSize * numLanes
// O(2^{outputSize/2}) computations (the birthday lower bound). Future standards may modify the
// capacity/outputSize ratio to allow for more output with lower cryptographic security.
type digest struct {
a [numLanes]uint64 // main state of the hash
b [numLanes]uint64 // intermediate states
c [sliceSize]uint64 // intermediate states
d [sliceSize]uint64 // intermediate states
outputSize int // desired output size in bytes
capacity int // number of bytes to leave untouched during squeeze/absorb
absorbed int // number of bytes absorbed thus far
a [numLanes]uint64 // main state of the hash
outputSize int // desired output size in bytes
capacity int // number of bytes to leave untouched during squeeze/absorb
absorbed int // number of bytes absorbed thus far
}
// minInt returns the lesser of two integer arguments, to simplify the absorption routine.
@ -116,7 +113,7 @@ func (d *digest) Write(p []byte) (int, error) {
// For every rate() bytes absorbed, the state must be permuted via the F Function.
if (d.absorbed)%d.rate() == 0 {
d.keccakF()
keccakF1600(&d.a)
}
}
@ -134,7 +131,7 @@ func (d *digest) Write(p []byte) (int, error) {
d.absorbed += (lastLane - firstLane) * laneSize
// For every rate() bytes absorbed, the state must be permuted via the F Function.
if (d.absorbed)%d.rate() == 0 {
d.keccakF()
keccakF1600(&d.a)
}
offset = 0
@ -167,7 +164,7 @@ func (d *digest) pad() {
// finalize prepares the hash to output data by padding and one final permutation of the state.
func (d *digest) finalize() {
d.pad()
d.keccakF()
keccakF1600(&d.a)
}
// squeeze outputs an arbitrary number of bytes from the hash state.
@ -192,7 +189,7 @@ func (d *digest) squeeze(in []byte, toSqueeze int) []byte {
out = out[laneSize:]
}
if len(out) > 0 {
d.keccakF()
keccakF1600(&d.a)
}
}
return in[:len(in)+toSqueeze] // Re-slice in case we wrote extra data.