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KDFNum is a uint8

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This commit is contained in:
Jonathan Rudenberg 2014-07-06 12:58:09 -07:00
parent e36eb5dddd
commit 84c8891ca7
1 changed files with 2 additions and 3 deletions
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5
box/box.go
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@ -9,7 +9,6 @@ import (
"encoding/binary"
"errors"
"io"
"strconv"
"code.google.com/p/go.crypto/curve25519"
"code.google.com/p/go.crypto/poly1305"
@ -46,7 +45,7 @@ type Crypter struct {
Key Key
PeerKey Key
ChainVar []byte
KDFNum int
KDFNum uint8
scratch [64]byte
cc CipherContext
@ -157,7 +156,7 @@ func (c *Crypter) DecryptBody(authtext, ciphertext []byte) ([]byte, error) {
}
func (c *Crypter) deriveKey(dh, cv []byte) ([]byte, []byte) {
extra := strconv.AppendInt(c.Cipher.AppendName(c.scratch[:0]), int64(c.KDFNum), 10)
extra := append(c.Cipher.AppendName(c.scratch[:0]), c.KDFNum)
k := DeriveKey(dh, extra, cv, CVLen+c.Cipher.CCLen())
c.KDFNum++
return k[:CVLen], k[CVLen:]