Abstract hash function usage (#28138)

Refactor Hash interfaces and centralize hash function. This will allow
easier introduction of different hash function later on.

This forms the "no-op" part of the SHA256 enablement patch.

1 files changed, 0 insertions, 61 deletions

diff --git a/modules/git/sha1_nogogit.go b/modules/git/sha1_nogogit.go
deleted file mode 100644
index d818d86a3a..0000000000
--- a/modules/git/sha1_nogogit.go
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2015 The Gogs Authors. All rights reserved.
-// Copyright 2019 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-//go:build !gogit
-
-package git
-
-import (
-	"crypto/sha1"
-	"encoding/hex"
-	"hash"
-	"strconv"
-)
-
-// SHA1 a git commit name
-type SHA1 [20]byte
-
-// String returns a string representation of the SHA
-func (s SHA1) String() string {
-	return hex.EncodeToString(s[:])
-}
-
-// IsZero returns whether this SHA1 is all zeroes
-func (s SHA1) IsZero() bool {
-	var empty SHA1
-	return s == empty
-}
-
-// ComputeBlobHash compute the hash for a given blob content
-func ComputeBlobHash(content []byte) SHA1 {
-	return ComputeHash(ObjectBlob, content)
-}
-
-// ComputeHash compute the hash for a given ObjectType and content
-func ComputeHash(t ObjectType, content []byte) SHA1 {
-	h := NewHasher(t, int64(len(content)))
-	_, _ = h.Write(content)
-	return h.Sum()
-}
-
-// Hasher is a struct that will generate a SHA1
-type Hasher struct {
-	hash.Hash
-}
-
-// NewHasher takes an object type and size and creates a hasher to generate a SHA
-func NewHasher(t ObjectType, size int64) Hasher {
-	h := Hasher{sha1.New()}
-	_, _ = h.Write(t.Bytes())
-	_, _ = h.Write([]byte(" "))
-	_, _ = h.Write([]byte(strconv.FormatInt(size, 10)))
-	_, _ = h.Write([]byte{0})
-	return h
-}
-
-// Sum generates a SHA1 for the provided hash
-func (h Hasher) Sum() (sha1 SHA1) {
-	copy(sha1[:], h.Hash.Sum(nil))
-	return sha1
-}