mirror of
https://github.com/miekg/dns.git
synced 2025-08-06 17:46:59 +02:00
05140a3136
This adds hash.go and creates a identityHash that is used for algorithms that do their own hashing (ED25519) for instance. This unifies the hash variable naming between dnssec and sig(0) signing and removes the special casing that existed for ED25519. This unifies the variable naming between sig(0) and dnssec signing and verifying. I didn't want to used crypto.RegisterHash as not to fiddle with the global namespaces of hashes, so the value of '0' from AlgorithmsToHash is handled specially in dnssec and sig(0) code. Note that ED448 isn't implemented at all. Signed-off-by: Miek Gieben <miek@miek.nl>
32 lines
875 B
Go
32 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
|
|
}
|