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Some ed25519 and key function docs

This commit is contained in:
Chad Retz 2018-05-16 17:56:00 -05:00
parent e6accf20e9
commit 3ed91b141c
2 changed files with 17 additions and 0 deletions
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7
torutil/ed25519/ed25519.go
View File

@ -38,10 +38,16 @@ func FromCryptoPublicKey(key ed25519.PublicKey) PublicKey {
return PublicKey(key)
}
// Public simply delegates to PublicKey() to satisfy crypto.Signer. This method
// does a bit more work than the traditional Go ed25519's private key's Public()
// method so developers are encouraged to reuse the result.
func (p PrivateKey) Public() crypto.PublicKey {
return p.PublicKey()
}
// PublicKey generates a public key for this private key. This method does a bit
// more work than the traditional Go ed25519's private key's Public() method so
// developers are encouraged to reuse the result.
func (p PrivateKey) PublicKey() PublicKey {
var A edwards25519.ExtendedGroupElement
var hBytes [32]byte
@ -52,6 +58,7 @@ func (p PrivateKey) PublicKey() PublicKey {
return publicKeyBytes[:]
}
// Sign is not yet implemented.
func (p PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error) {
if opts.HashFunc() != crypto.Hash(0) {
return nil, errors.New("ed25519: cannot sign hashed message")

10
torutil/key.go
View File

@ -15,6 +15,9 @@ import (
var serviceIDEncoding = base32.StdEncoding.WithPadding(base32.NoPadding)
// OnionServiceIDFromPrivateKey generates the onion service ID from the given
// private key. This panics if the private key is not a crypto/*rsa.PrivateKey
// or github.com/cretz/bine/torutil/ed25519.PrivateKey.
func OnionServiceIDFromPrivateKey(key crypto.PrivateKey) string {
switch k := key.(type) {
case *rsa.PrivateKey:
@ -25,6 +28,9 @@ func OnionServiceIDFromPrivateKey(key crypto.PrivateKey) string {
panic(fmt.Sprintf("Unrecognized private key type: %T", key))
}
// OnionServiceIDFromPublicKey generates the onion service ID from the given
// public key. This panics if the public key is not a crypto/*rsa.PublicKey or
// github.com/cretz/bine/torutil/ed25519.PublicKey.
func OnionServiceIDFromPublicKey(key crypto.PublicKey) string {
switch k := key.(type) {
case *rsa.PublicKey:
@ -35,12 +41,16 @@ func OnionServiceIDFromPublicKey(key crypto.PublicKey) string {
panic(fmt.Sprintf("Unrecognized private key type: %T", key))
}
// OnionServiceIDFromV2PublicKey generates a V2 service ID for the given
// RSA-1024 public key.
func OnionServiceIDFromV2PublicKey(key *rsa.PublicKey) string {
h := sha1.New()
h.Write(x509.MarshalPKCS1PublicKey(key))
return strings.ToLower(serviceIDEncoding.EncodeToString(h.Sum(nil)[:10]))
}
// OnionServiceIDFromV3PublicKey generates a V3 service ID for the given
// ED25519 public key.
func OnionServiceIDFromV3PublicKey(key ed25519.PublicKey) string {
checkSum := sha3.Sum256(append(append([]byte(".onion checksum"), key...), 0x03))
var keyBytes [35]byte