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package id
import (
"crypto/sha1" //#nosec:G505
"crypto/sha256"
"hash"
)
type objectFormatDetails struct {
name string
size int
sum func([]byte) ObjectID
new func() hash.Hash
}
func (objectFormat ObjectFormat) details() objectFormatDetails {
return objectFormatTable[objectFormat]
}
//nolint:gochecknoglobals
var objectFormatTable = [...]objectFormatDetails{
ObjectFormatUnknown: {}, //nolint:exhaustruct
ObjectFormatSHA1: {
name: "sha1",
size: sha1.Size,
sum: func(data []byte) ObjectID {
sum := sha1.Sum(data) //#nosec G401
var id ObjectID
copy(id.data[:], sum[:])
id.objectFormat = ObjectFormatSHA1
return id
},
new: sha1.New,
},
ObjectFormatSHA256: {
name: "sha256",
size: sha256.Size,
sum: func(data []byte) ObjectID {
sum := sha256.Sum256(data)
var id ObjectID
copy(id.data[:], sum[:])
id.objectFormat = ObjectFormatSHA256
return id
},
new: sha256.New,
},
}
// maxObjectIDSize MUST be >= the largest supported object format size.
const maxObjectIDSize = sha256.Size
var (
//nolint:gochecknoglobals
objectFormatByName = map[string]ObjectFormat{}
//nolint:gochecknoglobals
supportedObjectFormats []ObjectFormat
)
func init() { //nolint:gochecknoinits
for objectFormat := ObjectFormatUnknown + 1; int(objectFormat) < len(objectFormatTable); objectFormat++ {
info := &objectFormatTable[objectFormat]
objectFormatByName[info.name] = objectFormat
supportedObjectFormats = append(supportedObjectFormats, objectFormat)
}
}
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