mirror of
https://github.com/superseriousbusiness/gotosocial
synced 2024-12-21 02:03:19 +00:00
31 lines
875 B
Go
31 lines
875 B
Go
package dns
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto"
|
|
"hash"
|
|
)
|
|
|
|
// identityHash will not hash, it only buffers the data written into it and returns it as-is.
|
|
type identityHash struct {
|
|
b *bytes.Buffer
|
|
}
|
|
|
|
// Implement the hash.Hash interface.
|
|
|
|
func (i identityHash) Write(b []byte) (int, error) { return i.b.Write(b) }
|
|
func (i identityHash) Size() int { return i.b.Len() }
|
|
func (i identityHash) BlockSize() int { return 1024 }
|
|
func (i identityHash) Reset() { i.b.Reset() }
|
|
func (i identityHash) Sum(b []byte) []byte { return append(b, i.b.Bytes()...) }
|
|
|
|
func hashFromAlgorithm(alg uint8) (hash.Hash, crypto.Hash, error) {
|
|
hashnumber, ok := AlgorithmToHash[alg]
|
|
if !ok {
|
|
return nil, 0, ErrAlg
|
|
}
|
|
if hashnumber == 0 {
|
|
return identityHash{b: &bytes.Buffer{}}, hashnumber, nil
|
|
}
|
|
return hashnumber.New(), hashnumber, nil
|
|
}
|