Add usage example of generating a RSA private key for the Listener.
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77023b2ed7
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@ -8,11 +8,14 @@
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package main
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package main
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import (
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import (
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"crypto/rand"
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"crypto/rsa"
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"io"
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"io"
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"log"
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"log"
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"net/http"
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"net/http"
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"github.com/yawning/bulb"
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"github.com/yawning/bulb"
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"github.com/yawning/bulb/utils/pkcs1"
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)
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)
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func onionServer(w http.ResponseWriter, req *http.Request) {
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func onionServer(w http.ResponseWriter, req *http.Request) {
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@ -38,8 +41,21 @@ func main() {
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log.Fatalf("Authentication failed: %v", err)
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log.Fatalf("Authentication failed: %v", err)
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}
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}
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// Create an ephemeral port 80 Onion Service.
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// Generate a private key and create a port 80 Onion Service.
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l, err := c.Listener(80, nil)
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//
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// For one-shot services:` l, err := c.Listener(80, nil)` is considerably
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// easier.
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pk, err := rsa.GenerateKey(rand.Reader, 1024)
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if err != nil {
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log.Fatalf("Failed to generate RSA key")
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}
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id, err := pkcs1.OnionAddr(&pk.PublicKey)
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if err != nil {
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log.Fatalf("Failed to derive onion ID: %v", err)
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}
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log.Printf("Expected ID: %v", id)
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l, err := c.Listener(80, pk)
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if err != nil {
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if err != nil {
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log.Fatalf("Failed to get Listener: %v", err)
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log.Fatalf("Failed to get Listener: %v", err)
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}
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}
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@ -12,8 +12,11 @@ package pkcs1
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import (
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import (
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"crypto/rsa"
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"crypto/rsa"
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"crypto/sha1"
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"encoding/asn1"
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"encoding/asn1"
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"encoding/base32"
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"math/big"
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"math/big"
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"strings"
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)
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)
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type pkcs1RSAPrivKey struct {
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type pkcs1RSAPrivKey struct {
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@ -83,3 +86,16 @@ func DecodePublicKeyDER(b []byte) (*rsa.PublicKey, []byte, error) {
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rest, err := asn1.Unmarshal(b, pk)
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rest, err := asn1.Unmarshal(b, pk)
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return pk, rest, err
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return pk, rest, err
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}
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}
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// OnionAddr returns the Tor Onion Service address corresponding to a given
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// rsa.PublicKey.
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func OnionAddr(pk *rsa.PublicKey) (string, error) {
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der, err := EncodePublicKeyDER(pk)
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if err != nil {
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return "", err
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}
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h := sha1.Sum(der)
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hb32 := base32.StdEncoding.EncodeToString(h[:10])
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return strings.ToLower(hb32), nil
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}
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