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Add support for sha256 repositories (#23894)

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Currently only SHA1 repositories are supported by Gitea. This adds
support for alternate SHA256 with the additional aim of easier support
for additional hash types in the future.

Fixes: #13794
Limited by: https://github.com/go-git/go-git/issues/899
Depend on: #28138

<img width="776" alt="图片" src="5448c9a7-608e-4341-a149-5dd0069c9447">

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
This commit is contained in:
Adam Majer 2024-01-19 16:05:02 +00:00 • committed by GitHub
parent 07ba4d9f87
commit d68a613ba8
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
98 changed files with 834 additions and 76 deletions
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65
modules/git/object_format.go
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@ -5,6 +5,7 @@ package git
import (
"crypto/sha1"
"crypto/sha256"
"regexp"
"strconv"
)
@ -12,6 +13,9 @@ import (
// sha1Pattern can be used to determine if a string is an valid sha
var sha1Pattern = regexp.MustCompile(`^[0-9a-f]{4,40}$`)
// sha256Pattern can be used to determine if a string is an valid sha
var sha256Pattern = regexp.MustCompile(`^[0-9a-f]{4,64}$`)
type ObjectFormat interface {
// Name returns the name of the object format
Name() string
@ -29,11 +33,12 @@ type ObjectFormat interface {
ComputeHash(t ObjectType, content []byte) ObjectID
}
/* SHA1 Type */
type Sha1ObjectFormatImpl struct{}
var (
emptyObjectID = &Sha1Hash{}
emptyTree = &Sha1Hash{
emptySha1ObjectID = &Sha1Hash{}
emptySha1Tree = &Sha1Hash{
0x4b, 0x82, 0x5d, 0xc6, 0x42, 0xcb, 0x6e, 0xb9, 0xa0, 0x60,
0xe5, 0x4b, 0xf8, 0xd6, 0x92, 0x88, 0xfb, 0xee, 0x49, 0x04,
}
@ -41,11 +46,11 @@ var (
func (Sha1ObjectFormatImpl) Name() string { return "sha1" }
func (Sha1ObjectFormatImpl) EmptyObjectID() ObjectID {
return emptyObjectID
return emptySha1ObjectID
}
func (Sha1ObjectFormatImpl) EmptyTree() ObjectID {
return emptyTree
return emptySha1Tree
}
func (Sha1ObjectFormatImpl) FullLength() int { return 40 }
func (Sha1ObjectFormatImpl) IsValid(input string) bool {
@ -72,11 +77,59 @@ func (h Sha1ObjectFormatImpl) ComputeHash(t ObjectType, content []byte) ObjectID
return &sha1
}
var Sha1ObjectFormat ObjectFormat = Sha1ObjectFormatImpl{}
/* SHA256 Type */
type Sha256ObjectFormatImpl struct{}
var (
emptySha256ObjectID = &Sha256Hash{}
emptySha256Tree = &Sha256Hash{
0x6e, 0xf1, 0x9b, 0x41, 0x22, 0x5c, 0x53, 0x69, 0xf1, 0xc1,
0x04, 0xd4, 0x5d, 0x8d, 0x85, 0xef, 0xa9, 0xb0, 0x57, 0xb5,
0x3b, 0x14, 0xb4, 0xb9, 0xb9, 0x39, 0xdd, 0x74, 0xde, 0xcc,
0x53, 0x21,
}
)
func (Sha256ObjectFormatImpl) Name() string { return "sha256" }
func (Sha256ObjectFormatImpl) EmptyObjectID() ObjectID {
return emptySha256ObjectID
}
func (Sha256ObjectFormatImpl) EmptyTree() ObjectID {
return emptySha256Tree
}
func (Sha256ObjectFormatImpl) FullLength() int { return 64 }
func (Sha256ObjectFormatImpl) IsValid(input string) bool {
return sha256Pattern.MatchString(input)
}
func (Sha256ObjectFormatImpl) MustID(b []byte) ObjectID {
var id Sha256Hash
copy(id[0:32], b)
return &id
}
// ComputeHash compute the hash for a given ObjectType and content
func (h Sha256ObjectFormatImpl) ComputeHash(t ObjectType, content []byte) ObjectID {
hasher := sha256.New()
_, _ = hasher.Write(t.Bytes())
_, _ = hasher.Write([]byte(" "))
_, _ = hasher.Write([]byte(strconv.FormatInt(int64(len(content)), 10)))
_, _ = hasher.Write([]byte{0})
// HashSum generates a SHA256 for the provided hash
var sha256 Sha1Hash
copy(sha256[:], hasher.Sum(nil))
return &sha256
}
var (
Sha1ObjectFormat ObjectFormat = Sha1ObjectFormatImpl{}
Sha256ObjectFormat ObjectFormat = Sha256ObjectFormatImpl{}
)
var SupportedObjectFormats = []ObjectFormat{
Sha1ObjectFormat,
// TODO: add sha256
}
func ObjectFormatFromName(name string) ObjectFormat {