164 lines
3.1 KiB
Go
164 lines
3.1 KiB
Go
package util
|
|
|
|
import (
|
|
"crypto/sha512"
|
|
"encoding/hex"
|
|
"errors"
|
|
"hash"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
)
|
|
|
|
const SHA512ResultLength = 64
|
|
|
|
type SHA512Result struct {
|
|
result [SHA512ResultLength]byte
|
|
err error
|
|
}
|
|
|
|
func (s *SHA512Result) Array() [SHA512ResultLength]byte {
|
|
if s.err != nil {
|
|
return [SHA512ResultLength]byte{}
|
|
}
|
|
return s.result
|
|
}
|
|
|
|
func (s *SHA512Result) Slice() []byte {
|
|
if s.err != nil {
|
|
return []byte{}
|
|
}
|
|
return s.result[:]
|
|
}
|
|
|
|
func (s *SHA512Result) Upper() string {
|
|
if s.err != nil {
|
|
return ""
|
|
}
|
|
return strings.ToUpper(hex.EncodeToString(s.result[:]))
|
|
}
|
|
|
|
func (s *SHA512Result) Lower() string {
|
|
if s.err != nil {
|
|
return ""
|
|
}
|
|
return strings.ToLower(hex.EncodeToString(s.result[:]))
|
|
}
|
|
|
|
func (s *SHA512Result) Error() error {
|
|
return s.err
|
|
}
|
|
|
|
func NewSHA512Result(result []byte, err error) *SHA512Result {
|
|
res := &SHA512Result{
|
|
result: [SHA512ResultLength]byte{},
|
|
err: err,
|
|
}
|
|
copy(res.result[:], result)
|
|
return res
|
|
}
|
|
|
|
type SHA512 struct{}
|
|
|
|
func NewSHA512() *SHA512 {
|
|
return &SHA512{}
|
|
}
|
|
|
|
func (s *SHA512) FromReader(r io.Reader) *SHA512Result {
|
|
ha := sha512.New()
|
|
if _, err := io.Copy(ha, r); err != nil {
|
|
return NewSHA512Result(nil, err)
|
|
}
|
|
hashInBytes := ha.Sum(nil)
|
|
if len(hashInBytes) != SHA512ResultLength {
|
|
return NewSHA512Result(nil, errors.New("wrong length"))
|
|
}
|
|
return NewSHA512Result(hashInBytes, nil)
|
|
}
|
|
|
|
func (s *SHA512) FromFile(filename string) *SHA512Result {
|
|
file, err := os.Open(filepath.Clean(filename))
|
|
if err != nil {
|
|
return NewSHA512Result(nil, err)
|
|
}
|
|
defer func() {
|
|
_ = file.Close()
|
|
}()
|
|
return s.FromReader(file)
|
|
}
|
|
|
|
func (s *SHA512) FromReaderChunk(r io.Reader, chunksize int) *SHA512Result {
|
|
buf := make([]byte, chunksize)
|
|
s1 := sha512.New()
|
|
var n int
|
|
var err error
|
|
for {
|
|
n, err = r.Read(buf)
|
|
if err != nil {
|
|
if err != io.EOF {
|
|
return NewSHA512Result(nil, err)
|
|
}
|
|
if n > 0 {
|
|
_, err = s1.Write(buf[:n])
|
|
if err != nil {
|
|
return NewSHA512Result(nil, err)
|
|
}
|
|
}
|
|
break
|
|
}
|
|
_, err = s1.Write(buf[:n])
|
|
if err != nil {
|
|
return NewSHA512Result(nil, err)
|
|
}
|
|
}
|
|
return NewSHA512Result(s1.Sum(nil), nil)
|
|
}
|
|
|
|
func (s *SHA512) FromFileChunk(filename string, chunksize int) *SHA512Result {
|
|
file, err := os.Open(filepath.Clean(filename))
|
|
if err != nil {
|
|
return NewSHA512Result(nil, err)
|
|
}
|
|
defer func() {
|
|
_ = file.Close()
|
|
}()
|
|
return s.FromReaderChunk(file, chunksize)
|
|
}
|
|
|
|
func (s *SHA512) FromBytes(b []byte) *SHA512Result {
|
|
res := sha512.Sum512(b)
|
|
return NewSHA512Result(res[:], nil)
|
|
}
|
|
|
|
func (s *SHA512) FromString(str string) *SHA512Result {
|
|
res := sha512.Sum512([]byte(str))
|
|
return NewSHA512Result(res[:], nil)
|
|
}
|
|
|
|
type SHA512Pip struct {
|
|
sha512 hash.Hash
|
|
}
|
|
|
|
func NewSHA512Pip() *SHA512Pip {
|
|
return &SHA512Pip{sha512: sha512.New()}
|
|
}
|
|
|
|
func (s *SHA512Pip) Write(data []byte) (n int, err error) {
|
|
return s.sha512.Write(data)
|
|
}
|
|
|
|
func (s *SHA512Pip) WriteBytes(data []byte) error {
|
|
_, err := s.Write(data)
|
|
return err
|
|
}
|
|
|
|
func (s *SHA512Pip) WriteString(data string) error {
|
|
_, err := s.Write([]byte(data))
|
|
return err
|
|
}
|
|
|
|
func (s *SHA512Pip) Result() *SHA512Result {
|
|
return NewSHA512Result(s.sha512.Sum(nil), nil)
|
|
}
|