105 lines
2.1 KiB
Go
105 lines
2.1 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package digestutils
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import (
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"bufio"
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"crypto/md5"
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"crypto/sha256"
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"encoding/hex"
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"hash"
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"io"
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"os"
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"strings"
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"d7y.io/dragonfly/v2/internal/constants"
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"d7y.io/dragonfly/v2/pkg/unit"
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"d7y.io/dragonfly/v2/pkg/util/fileutils"
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)
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func Sha256(values ...string) string {
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if len(values) == 0 {
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return ""
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}
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h := sha256.New()
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for _, content := range values {
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if _, err := h.Write([]byte(content)); err != nil {
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return ""
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}
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}
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return ToHashString(h)
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}
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func Md5Reader(reader io.Reader) string {
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h := md5.New()
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if _, err := io.Copy(h, reader); err != nil {
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return ""
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}
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return ToHashString(h)
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}
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func Md5Bytes(bytes []byte) string {
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h := md5.New()
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h.Write(bytes)
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return ToHashString(h)
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}
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// HashFile computes hash value corresponding to hashType,
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// hashType is from constants.Md5Hash and constants.Sha256Hash.
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func HashFile(file string, hashType string) string {
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if !fileutils.IsRegular(file) {
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return ""
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}
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f, err := os.Open(file)
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if err != nil {
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return ""
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}
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defer f.Close()
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var h hash.Hash
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if hashType == constants.Md5Hash {
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h = md5.New()
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} else if hashType == constants.Sha256Hash {
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h = sha256.New()
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} else {
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return ""
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}
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r := bufio.NewReaderSize(f, int(4*unit.MB))
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_, err = io.Copy(h, r)
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if err != nil {
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return ""
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}
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return ToHashString(h)
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}
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func ToHashString(h hash.Hash) string {
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return hex.EncodeToString(h.Sum(nil))
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}
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func Parse(digest string) []string {
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digest = strings.Trim(digest, " ")
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return strings.Split(digest, ":")
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}
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