neoneo-go/pkg/crypto/hash/hash.go
2019-02-25 22:44:14 +00:00

77 lines
1.3 KiB
Go
Executable file

package hash
import (
"crypto/sha256"
"io"
"github.com/CityOfZion/neo-go/pkg/wire/util"
"golang.org/x/crypto/ripemd160"
)
func Sha256(data []byte) (util.Uint256, error) {
var hash util.Uint256
hasher := sha256.New()
hasher.Reset()
_, err := hasher.Write(data)
hash, err = util.Uint256DecodeBytes(hasher.Sum(nil))
if err != nil {
return hash, err
}
return hash, nil
}
func DoubleSha256(data []byte) (util.Uint256, error) {
var hash util.Uint256
h1, err := Sha256(data)
if err != nil {
return hash, err
}
hash, err = Sha256(h1.Bytes())
if err != nil {
return hash, err
}
return hash, nil
}
func RipeMD160(data []byte) (util.Uint160, error) {
var hash util.Uint160
hasher := ripemd160.New()
hasher.Reset()
_, err := io.WriteString(hasher, string(data))
hash, err = util.Uint160DecodeBytes(hasher.Sum(nil))
if err != nil {
return hash, err
}
return hash, nil
}
func Hash160(data []byte) (util.Uint160, error) {
var hash util.Uint160
h1, err := Sha256(data)
h2, err := RipeMD160(h1.Bytes())
hash, err = util.Uint160DecodeBytes(h2.Bytes())
if err != nil {
return hash, err
}
return hash, nil
}
func Checksum(data []byte) ([]byte, error) {
hash, err := Sum(data)
if err != nil {
return nil, err
}
return hash[:4], nil
}
func Sum(b []byte) (util.Uint256, error) {
hash, err := DoubleSha256((b))
return hash, err
}