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package objectid
import (
"crypto/sha1" //#nosec:G505
"crypto/sha256"
)
//nolint:gochecknoglobals
var algorithmTable = [...]algorithmDetails{
AlgorithmUnknown: {},
AlgorithmSHA1: {
name: "sha1",
size: sha1.Size,
packHashID: 1,
sum: func(data []byte) ObjectID {
sum := sha1.Sum(data) //#nosec G401
var id ObjectID
copy(id.data[:], sum[:])
id.algo = AlgorithmSHA1
return id
},
new: sha1.New,
},
AlgorithmSHA256: {
name: "sha256",
size: sha256.Size,
packHashID: 2,
sum: func(data []byte) ObjectID {
sum := sha256.Sum256(data)
var id ObjectID
copy(id.data[:], sum[:])
id.algo = AlgorithmSHA256
return id
},
new: sha256.New,
},
}
var (
//nolint:gochecknoglobals
algorithmByName = map[string]Algorithm{}
//nolint:gochecknoglobals
supportedAlgorithms []Algorithm
)
func init() { //nolint:gochecknoinits
emptyTreeInput := []byte("tree 0\x00")
for algo := Algorithm(0); int(algo) < len(algorithmTable); algo++ {
info := &algorithmTable[algo]
if info.name == "" {
continue
}
info.emptyTree = info.sum(emptyTreeInput)
algorithmByName[info.name] = algo
supportedAlgorithms = append(supportedAlgorithms, algo)
}
}
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