* add hash.go in crypto package

* add base32 / base64 in destination

* add helper functions for base64 / base32

lib/common/base32/base32.go

@@ -9,3 +9,10 @@ import (
 
 // i2p base32 encoding
 var I2PEncoding *b32.Encoding = b32.NewEncoding("abcdefghijklmnopqrstuvwxyz234567")
+
+
+// wrapper arround encoding for encoding to string
+func EncodeToString(data []byte) (str string) {
+  str = I2PEncoding.EncodeToString(data)
+  return
+}

lib/common/base64/base64.go

@@ -9,3 +9,9 @@ import (
 
 // i2p base64 encoding
 var I2PEncoding *b64.Encoding = b64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-~")
+
+// wrapper arround encoding for encoding to string
+func EncodeToString(data []byte) (str string) {
+  str = I2PEncoding.EncodeToString(data)
+  return
+}

lib/crypto/hash.go

@@ -0,0 +1,7 @@
+package crypto
+
+import (
+  "crypto/sha256"
+)
+
+var SHA256 = sha256.Sum256

lib/stdi2p/destination.go

@@ -1,7 +1,10 @@
 package stdi2p
 
-import (
+import( 
+  "github.com/bounce-chat/go-i2p/lib/common/base32"
+  "github.com/bounce-chat/go-i2p/lib/common/base64"
   "github.com/bounce-chat/go-i2p/lib/crypto"
+  "strings"
 )
 
 // a network endpoint inside i2p
@@ -12,6 +15,7 @@ type Destination []byte
 func (dest Destination) PublicKey() (k crypto.PublicEncryptionKey) {
   cert := dest.Certificate()
   if cert.Type() == CERT_KEY {
+    // TODO(psi): check for key cert and included encryption key
   } else {
     var ek crypto.ElgPublicKey
     copy(ek[:], dest[:256])
@@ -31,6 +35,7 @@ func (dest Destination) SigningPublicKey() (k crypto.SigningPublicKey) {
   cert := dest.Certificate()
   if cert.Type() == CERT_KEY {
     // we have a key certificate
+    // extract the signing key from the key cert
     k = KeyCert(cert).SigningPublicKey()
   } else {
     var pk crypto.DSAPublicKey
@@ -39,3 +44,16 @@ func (dest Destination) SigningPublicKey() (k crypto.SigningPublicKey) {
   }
   return
 }
+
+// return the .b32.i2p address
+func (dest Destination) Base32Address() (str string) {
+  h := crypto.SHA256(dest)
+  str = strings.Trim(base32.EncodeToString(h[:]), "=")
+  str += ".b32.i2p"
+  return
+}
+
+func (dest Destination) Base64() (str string) {
+  str = base64.EncodeToString(dest)
+  return
+}