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Merge pull request 'fix: git.ComputeHash did not write the content' (#3466) from oliverpool/forgejo:fix_compute_hash into forgejo

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Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/3466
Reviewed-by: Otto <otto@codeberg.org>
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
This commit is contained in:
oliverpool 2024-04-26 10:15:23 +00:00
commit 20350846fc
4 changed files with 32 additions and 23 deletions
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36
modules/git/object_format.go
View file

@ -6,6 +6,7 @@ package git
import (
"crypto/sha1"
"crypto/sha256"
"hash"
"regexp"
"strconv"
)
@ -33,6 +34,15 @@ type ObjectFormat interface {
ComputeHash(t ObjectType, content []byte) ObjectID
}
func computeHash(dst []byte, hasher hash.Hash, t ObjectType, content []byte) []byte {
_, _ = hasher.Write(t.Bytes())
_, _ = hasher.Write([]byte(" "))
_, _ = hasher.Write([]byte(strconv.Itoa(len(content))))
_, _ = hasher.Write([]byte{0})
_, _ = hasher.Write(content)
return hasher.Sum(dst)
}
/* SHA1 Type */
type Sha1ObjectFormatImpl struct{}
@ -65,16 +75,9 @@ func (Sha1ObjectFormatImpl) MustID(b []byte) ObjectID {
// ComputeHash compute the hash for a given ObjectType and content
func (h Sha1ObjectFormatImpl) ComputeHash(t ObjectType, content []byte) ObjectID {
hasher := sha1.New()
_, _ = hasher.Write(t.Bytes())
_, _ = hasher.Write([]byte(" "))
_, _ = hasher.Write([]byte(strconv.FormatInt(int64(len(content)), 10)))
_, _ = hasher.Write([]byte{0})
// HashSum generates a SHA1 for the provided hash
var sha1 Sha1Hash
copy(sha1[:], hasher.Sum(nil))
return &sha1
var obj Sha1Hash
computeHash(obj[:0], sha1.New(), t, content)
return &obj
}
/* SHA256 Type */
@ -111,16 +114,9 @@ func (Sha256ObjectFormatImpl) MustID(b []byte) ObjectID {
// 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 obj Sha256Hash
computeHash(obj[:0], sha256.New(), t, content)
return &obj
}
var (

4
modules/git/object_id_test.go
View file

@ -18,4 +18,8 @@ func TestIsValidSHAPattern(t *testing.T) {
assert.False(t, h.IsValid("abc"))
assert.False(t, h.IsValid("123g"))
assert.False(t, h.IsValid("some random text"))
assert.Equal(t, "79ee38a6416c1ede423ec7ee0a8639ceea4aad22", ComputeBlobHash(Sha1ObjectFormat, []byte("some random blob")).String())
assert.Equal(t, "d5c6407415d85df49592672aa421aed39b9db5e3", ComputeBlobHash(Sha1ObjectFormat, []byte("same length blob")).String())
assert.Equal(t, "df0b5174ed06ae65aea40d43316bcbc21d82c9e3158ce2661df2ad28d7931dd6", ComputeBlobHash(Sha256ObjectFormat, []byte("some random blob")).String())
}