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package crypto
import (
"bytes"
"encoding/hex"
"fmt"
"testing"
"time"
"github.com/ethereum/go-ethereum/crypto/secp256k1"
"github.com/ethereum/go-ethereum/ethutil"
)
// These tests are sanity checks.
// They should ensure that we don't e.g. use Sha3-224 instead of Sha3-256
// and that the sha3 library uses keccak-f permutation.
func TestSha3(t *testing.T) {
msg := []byte("abc")
exp, _ := hex.DecodeString("4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45")
checkhash(t, "Sha3-256", Sha3, msg, exp)
}
func TestSha256(t *testing.T) {
msg := []byte("abc")
exp, _ := hex.DecodeString("ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
checkhash(t, "Sha256", Sha256, msg, exp)
}
func TestRipemd160(t *testing.T) {
msg := []byte("abc")
exp, _ := hex.DecodeString("8eb208f7e05d987a9b044a8e98c6b087f15a0bfc")
checkhash(t, "Ripemd160", Ripemd160, msg, exp)
}
func checkhash(t *testing.T, name string, f func([]byte) []byte, msg, exp []byte) {
sum := f(msg)
if bytes.Compare(exp, sum) != 0 {
t.Errorf("hash %s returned wrong result.\ngot: %x\nwant: %x", name, sum, exp)
}
}
func BenchmarkSha3(b *testing.B) {
a := []byte("hello world")
amount := 1000000
start := time.Now()
for i := 0; i < amount; i++ {
Sha3(a)
}
fmt.Println(amount, ":", time.Since(start))
}
func Test0Key(t *testing.T) {
key := ethutil.Hex2Bytes("1111111111111111111111111111111111111111111111111111111111111111")
p, err := secp256k1.GeneratePubKey(key)
addr := Sha3(p[1:])[12:]
fmt.Printf("%x\n", p)
fmt.Printf("%v %x\n", err, addr)
}
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