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minio/pkg/crypto/sha512/sha512_windows.go

63 lines
1.5 KiB

/*
* Minimalist Object Storage, (C) 2014 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package sha512
import (
"io"
"crypto/sha512"
)
// The size of a SHA512 checksum in bytes.
const (
Size = sha512.Size
)
// Sum512 - single caller sha512 helper
func Sum512(data []byte) []byte {
d := sha512.New()
d.Write(data)
return d.Sum(nil)
}
// Sum - io.Reader based streaming sha512 helper
func Sum(reader io.Reader) ([]byte, error) {
d := sha512.New()
var err error
for err == nil {
length := 0
byteBuffer := make([]byte, 1024*1024)
length, err = reader.Read(byteBuffer)
byteBuffer = byteBuffer[0:length]
d.Write(byteBuffer)
}
if err != io.EOF {
return nil, err
}
return d.Sum(nil), nil
}
// SumStream - similar to 'Sum()' but returns a [sha512.Size]byte
func SumStream(reader io.Reader) ([sha512.Size]byte, error) {
var returnValue [sha512.Size]byte
sumSlice, err := Sum(reader)
if err != nil {
return returnValue, err
}
copy(returnValue[:], sumSlice)
return returnValue, err
}