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minio/pkg/crypto/sha256/sha256_windows.go

48 lines
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/*
* 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 sha256
import (
"io"
"crypto/sha256"
)
// Sum256 - single caller sha256 helper
func Sum256(data []byte) []byte {
d := sha256.New()
d.Write(data)
return d.Sum(nil)
}
// Sum - io.Reader based streaming sha256 helper
func Sum(reader io.Reader) ([]byte, error) {
d := sha256.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
}