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Remove 2 allocs by using buffer for keystream

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This commit is contained in:
Jonathan Rudenberg 2014-07-03 22:46:30 -07:00
parent 908c2ac8a2
commit 6650461c89
No known key found for this signature in database
GPG Key ID: E38D8C6BAA8C49AA
1 changed files with 10 additions and 6 deletions
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16
box/box.go
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@ -187,11 +187,12 @@ func (noise255) DH(privkey, pubkey []byte) []byte {
}
func (noise255) NewCipher(cv []byte) CipherContext {
return &noise255ctx{cv}
return &noise255ctx{cc: cv}
}
type noise255ctx struct {
cc []byte
cc []byte
keystream [128]byte
}
func (n *noise255ctx) key() (cipher.Stream, []byte) {
@ -203,11 +204,14 @@ func (n *noise255ctx) key() (cipher.Stream, []byte) {
panic(err)
}
keystream := make([]byte, 128)
c.XORKeyStream(keystream, keystream)
for i := range n.keystream {
n.keystream[i] = 0
}
n.cc = keystream[64:104]
return c, keystream
c.XORKeyStream(n.keystream[:], n.keystream[:])
n.cc = n.keystream[64:104]
return c, n.keystream[:]
}
func (n *noise255ctx) mac(keystream, authtext, ciphertext []byte) [16]byte {