neo-go/pkg/crypto/hash/hash.go

54 lines
1.1 KiB
Go

package hash
import (
"crypto/sha256"
"github.com/CityOfZion/neo-go/pkg/util"
"golang.org/x/crypto/ripemd160"
)
// Sha256 hashes the incoming byte slice
// using the sha256 algorithm
func Sha256(data []byte) util.Uint256 {
hash := sha256.Sum256(data)
return hash
}
// DoubleSha256 performs sha256 twice on the given data
func DoubleSha256(data []byte) util.Uint256 {
var hash util.Uint256
h1 := Sha256(data)
hash = Sha256(h1.Bytes())
return hash
}
// RipeMD160 performs the RIPEMD160 hash algorithm
// on the given data
func RipeMD160(data []byte) util.Uint160 {
var hash util.Uint160
hasher := ripemd160.New()
_, _ = hasher.Write(data)
hash, _ = util.Uint160DecodeBytes(hasher.Sum(nil))
return hash
}
// Hash160 performs sha256 and then ripemd160
// on the given data
func Hash160(data []byte) util.Uint160 {
var hash util.Uint160
h1 := Sha256(data)
h2 := RipeMD160(h1.Bytes())
hash, _ = util.Uint160DecodeBytes(h2.Bytes())
return hash
}
// Checksum returns the checksum for a given piece of data
// using sha256 twice as the hash algorithm
func Checksum(data []byte) []byte {
hash := DoubleSha256(data)
return hash[:4]
}