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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
123 lines
2.8 KiB
Go
123 lines
2.8 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package packages
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import (
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"crypto/md5"
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"crypto/sha1"
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"crypto/sha256"
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"crypto/sha512"
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"encoding"
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"errors"
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"hash"
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"io"
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)
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const (
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marshaledSizeMD5 = 92
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marshaledSizeSHA1 = 96
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marshaledSizeSHA256 = 108
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marshaledSizeSHA512 = 204
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marshaledSize = marshaledSizeMD5 + marshaledSizeSHA1 + marshaledSizeSHA256 + marshaledSizeSHA512
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)
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// HashSummer provide a Sums method
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type HashSummer interface {
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Sums() (hashMD5, hashSHA1, hashSHA256, hashSHA512 []byte)
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}
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// MultiHasher calculates multiple checksums
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type MultiHasher struct {
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md5 hash.Hash
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sha1 hash.Hash
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sha256 hash.Hash
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sha512 hash.Hash
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combinedWriter io.Writer
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}
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// NewMultiHasher creates a multi hasher
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func NewMultiHasher() *MultiHasher {
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md5 := md5.New()
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sha1 := sha1.New()
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sha256 := sha256.New()
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sha512 := sha512.New()
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combinedWriter := io.MultiWriter(md5, sha1, sha256, sha512)
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return &MultiHasher{
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md5,
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sha1,
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sha256,
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sha512,
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combinedWriter,
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}
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}
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// MarshalBinary implements encoding.BinaryMarshaler
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func (h *MultiHasher) MarshalBinary() ([]byte, error) {
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md5Bytes, err := h.md5.(encoding.BinaryMarshaler).MarshalBinary()
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if err != nil {
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return nil, err
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}
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sha1Bytes, err := h.sha1.(encoding.BinaryMarshaler).MarshalBinary()
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if err != nil {
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return nil, err
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}
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sha256Bytes, err := h.sha256.(encoding.BinaryMarshaler).MarshalBinary()
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if err != nil {
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return nil, err
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}
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sha512Bytes, err := h.sha512.(encoding.BinaryMarshaler).MarshalBinary()
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if err != nil {
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return nil, err
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}
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b := make([]byte, 0, marshaledSize)
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b = append(b, md5Bytes...)
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b = append(b, sha1Bytes...)
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b = append(b, sha256Bytes...)
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b = append(b, sha512Bytes...)
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return b, nil
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}
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// UnmarshalBinary implements encoding.BinaryUnmarshaler
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func (h *MultiHasher) UnmarshalBinary(b []byte) error {
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if len(b) != marshaledSize {
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return errors.New("invalid hash state size")
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}
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if err := h.md5.(encoding.BinaryUnmarshaler).UnmarshalBinary(b[:marshaledSizeMD5]); err != nil {
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return err
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}
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b = b[marshaledSizeMD5:]
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if err := h.sha1.(encoding.BinaryUnmarshaler).UnmarshalBinary(b[:marshaledSizeSHA1]); err != nil {
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return err
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}
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b = b[marshaledSizeSHA1:]
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if err := h.sha256.(encoding.BinaryUnmarshaler).UnmarshalBinary(b[:marshaledSizeSHA256]); err != nil {
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return err
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}
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b = b[marshaledSizeSHA256:]
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return h.sha512.(encoding.BinaryUnmarshaler).UnmarshalBinary(b[:marshaledSizeSHA512])
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}
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// Write implements io.Writer
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func (h *MultiHasher) Write(p []byte) (int, error) {
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return h.combinedWriter.Write(p)
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}
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// Sums gets the MD5, SHA1, SHA256 and SHA512 checksums of the data
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func (h *MultiHasher) Sums() (hashMD5, hashSHA1, hashSHA256, hashSHA512 []byte) {
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hashMD5 = h.md5.Sum(nil)
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hashSHA1 = h.sha1.Sum(nil)
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hashSHA256 = h.sha256.Sum(nil)
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hashSHA512 = h.sha512.Sum(nil)
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return hashMD5, hashSHA1, hashSHA256, hashSHA512
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}
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