forked from TrueCloudLab/neoneo-go
88 lines
1.8 KiB
Go
Executable file
88 lines
1.8 KiB
Go
Executable file
package hash
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import (
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"crypto/sha256"
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"io"
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"github.com/CityOfZion/neo-go/pkg/wire/util"
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"golang.org/x/crypto/ripemd160"
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)
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// Sha256 hashes the incoming byte slice
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// using the sha256 algorithm
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func Sha256(data []byte) (util.Uint256, error) {
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var hash util.Uint256
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hasher := sha256.New()
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hasher.Reset()
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_, err := hasher.Write(data)
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hash, err = util.Uint256DecodeBytes(hasher.Sum(nil))
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if err != nil {
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return hash, err
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}
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return hash, nil
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}
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// DoubleSha256 performs sha256 twice on the given data
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func DoubleSha256(data []byte) (util.Uint256, error) {
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var hash util.Uint256
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h1, err := Sha256(data)
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if err != nil {
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return hash, err
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}
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hash, err = Sha256(h1.Bytes())
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if err != nil {
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return hash, err
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}
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return hash, nil
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}
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// RipeMD160 performs the RIPEMD160 hash algorithm
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// on the given data
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func RipeMD160(data []byte) (util.Uint160, error) {
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var hash util.Uint160
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hasher := ripemd160.New()
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hasher.Reset()
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_, err := io.WriteString(hasher, string(data))
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hash, err = util.Uint160DecodeBytes(hasher.Sum(nil))
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if err != nil {
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return hash, err
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}
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return hash, nil
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}
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// Hash160 performs sha256 and then ripemd160
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// on the given data
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func Hash160(data []byte) (util.Uint160, error) {
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var hash util.Uint160
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h1, err := Sha256(data)
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h2, err := RipeMD160(h1.Bytes())
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hash, err = util.Uint160DecodeBytes(h2.Bytes())
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if err != nil {
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return hash, err
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}
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return hash, nil
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}
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// Checksum returns the checksum for a given piece of data
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// using sha256 twice as the hash algorithm
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func Checksum(data []byte) ([]byte, error) {
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hash, err := Sum(data)
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if err != nil {
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return nil, err
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}
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return hash[:4], nil
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}
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// Sum performs sha256 twice on the given data
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// XXX(issue): We should remove this and just do doublesha256
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func Sum(b []byte) (util.Uint256, error) {
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hash, err := DoubleSha256((b))
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return hash, err
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}
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