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package multihash
import (
"bytes"
"crypto/sha256"
"hash"
)
type identityMultihash struct {
bytes.Buffer
}
func (identityMultihash) BlockSize() int {
return 32 // A prefered block size is nonsense for the "identity" "hash". An arbitrary but unsurprising and positive nonzero number has been chosen to minimize the odds of fascinating bugs.
}
func (x *identityMultihash) Size() int {
return x.Len()
}
func (x *identityMultihash) Sum(digest []byte) []byte {
return x.Bytes()
}
type doubleSha256 struct {
hash.Hash
}
func (x doubleSha256) Sum(digest []byte) []byte {
digest = x.Hash.Sum(digest)
h2 := sha256.New()
h2.Write(digest)
return h2.Sum(digest[0:0])
}
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