func (p PrivateKeys) MarshalJSON() ([]byte, error) {
type pair struct {
Pub string `json:"pub,omitempty"`
Prv string `json:"prv,omitempty"`
}
m := make(map[string]pair, len(p))
for k, v := range p {
m[hex.EncodeToString([]byte{k})] = pair{
Pub: base32util.EncodeToString(v.Public()),
Prv: base32util.EncodeToString(v.Private()),
}
}
return json.Marshal(m)
}
// FromKeyAndIntermediates derives a hasname from a public key and some intermediate parts.
func FromKeyAndIntermediates(id uint8, key []byte, intermediates cipherset.Parts) (H, error) {
var (
all = make(cipherset.Parts, len(intermediates)+1)
sum = sha256.Sum256(key)
intermediate = base32util.EncodeToString(sum[:])
)
for k, v := range intermediates {
all[k] = v
}
all[id] = intermediate
return FromIntermediates(all)
}
// PartsFromKeys derives the intermediate parts from their respectve public keys.
func PartsFromKeys(keys cipherset.Keys) cipherset.Parts {
var (
hash = sha256.New()
intermediates = make(cipherset.Parts, len(keys))
buf [32]byte
)
for id, key := range keys {
hash.Write(key.Public())
hash.Sum(buf[:0])
hash.Reset()
intermediates[id] = base32util.EncodeToString(buf[:])[:52]
}
return intermediates
}
// FromIntermediates derives a hashname from its intermediate parts.
func FromIntermediates(parts cipherset.Parts) (H, error) {
if len(parts) == 0 {
return "", ErrNoIntermediateParts
}
var (
hash = sha256.New()
ids = make([]int, 0, len(parts))
buf [32]byte
)
for id := range parts {
ids = append(ids, int(id))
}
sort.Ints(ids)
for _, id := range ids {
// decode intermediate part
partString := parts[uint8(id)]
if len(partString) != 52 {
return "", ErrInvalidIntermediatePart
}
part, err := base32util.DecodeString(partString)
if err != nil {
return "", ErrInvalidIntermediatePart
}
buf[0] = byte(id)
hash.Write(buf[:1])
hash.Sum(buf[:0])
hash.Reset()
hash.Write(buf[:32])
hash.Write(part)
hash.Sum(buf[:0])
hash.Reset()
hash.Write(buf[:32])
}
return H(base32util.EncodeToString(buf[:32])), nil
}
func (o opaqueKey) String() string {
return base32util.EncodeToString(o.pub)
}
func (k *key) String() string {
return base32util.EncodeToString((*k.pub)[:])
}
func (k *key) String() string {
return base32util.EncodeToString(k.Public())
}