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crypto/tls: remove bookkeeping code from pHash function

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Since copy function can figure out how many bytes of data to copy when
two slices have different length, it is not necessary to check how many
bytes need to copy each time before copying the data.

Change-Id: I5151ddfe46af5575566fe9c9a2648e111575ec3d
Reviewed-on: https://go-review.googlesource.com/71090
Reviewed-by: Filippo Valsorda <hi@filippo.io>
Run-TryBot: Filippo Valsorda <hi@filippo.io>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Joe Kyo 2017-10-16 07:25:14 +01:00 committed by Filippo Valsorda
parent 6c380f3bb6
commit 00b53d39c3
1 changed files with 2 additions and 6 deletions
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8
prf.go
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@ -35,12 +35,8 @@ func pHash(result, secret, seed []byte, hash func() hash.Hash) {
h.Write(a) h.Write(a)
h.Write(seed) h.Write(seed)
b := h.Sum(nil) b := h.Sum(nil)
todo := len(b) copy(result[j:], b)
if j+todo > len(result) { j += len(b)
todo = len(result) - j
}
copy(result[j:j+todo], b)
j += todo
h.Reset() h.Reset()
h.Write(a) h.Write(a)