func NewSkein512() hash.Hash {
res, err := skein.New(512, 512)
if err != nil {
return nil
}
return res
}
func NewSkein1024() hash.Hash {
res, err := skein.New(1024, 1024)
if err != nil {
return nil
}
return res
}
func NewSkein256() hash.Hash {
res, err := skein.New(256, 256)
if err != nil {
return nil
}
return res
}
func checkKATVectors(ks *katScanner) bool {
kr := new(katResult)
var tree, mac, normal int
for ks.fillResult(kr) {
if strings.Contains(string(kr.restOfLine), "Tree") {
tree++
continue
}
if strings.Contains(string(kr.restOfLine), "MAC") {
skein, _ := skein.NewMac(kr.stateSize, kr.hashBitLength, kr.macKey)
skein.UpdateBits(kr.msg, kr.msgLength)
hash := skein.DoFinal()
if ret := bytes.Compare(hash, kr.result); ret != 0 {
fmt.Printf("%d-%d-%d-%s\n", kr.stateSize, kr.hashBitLength,
kr.msgLength, string(kr.restOfLine))
fmt.Printf("Computed mac:\n%s\n", hex.EncodeToString(hash))
fmt.Printf("Expected mac:\n%s\n", hex.EncodeToString(kr.result))
return false
}
// do it second time with same instance to check if context was
// reset correctly
skein.UpdateBits(kr.msg, kr.msgLength)
hash = skein.DoFinal()
if ret := bytes.Compare(hash, kr.result); ret != 0 {
fmt.Printf("%d-%d-%d-%s\n", kr.stateSize, kr.hashBitLength,
kr.msgLength, string(kr.restOfLine))
fmt.Printf("Computed mac after reset:\n%s\n", hex.EncodeToString(hash))
fmt.Printf("Expected mac:\n%s\n", hex.EncodeToString(kr.result))
return false
}
mac++
continue
}
skein, _ := skein.New(kr.stateSize, kr.hashBitLength)
skein.UpdateBits(kr.msg, kr.msgLength)
hash := skein.DoFinal()
if ret := bytes.Compare(hash, kr.result); ret != 0 {
fmt.Printf("%d-%d-%d-%s\n", kr.stateSize, kr.hashBitLength,
kr.msgLength, string(kr.restOfLine))
fmt.Printf("Computed hash:\n%s\n", hex.EncodeToString(hash))
fmt.Printf("Expected result:\n%s\n", hex.EncodeToString(kr.result))
return false
}
// do it second time with same instance to check if context was reset
// correctly
skein.UpdateBits(kr.msg, kr.msgLength)
hash = skein.DoFinal()
if ret := bytes.Compare(hash, kr.result); ret != 0 {
fmt.Printf("%d-%d-%d-%s\n", kr.stateSize, kr.hashBitLength,
kr.msgLength, string(kr.restOfLine))
fmt.Printf("Computed hash after reset:\n%s\n", hex.EncodeToString(hash))
fmt.Printf("Expected result:\n%s\n", hex.EncodeToString(kr.result))
return false
}
normal++
}
fmt.Printf("(Tree: %d), mac: %d, normal: %d, Skein tests total: %d\n",
tree, mac, normal, mac+normal)
return true
}