get rid of stdi2p package, move everything relivent to common package

lib/common/destination.go

@@ -0,0 +1,59 @@
+package common
+
+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
+// effectively a public key blob
+type Destination []byte
+
+// obtain public elgamal key
+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])
+		k = ek
+	}
+	return
+}
+
+// obtain destination certificate
+func (dest Destination) Certificate() Certificate {
+	return Certificate(dest[128+256:])
+}
+
+// gets this destination's signing key
+// if there is a keycert in this destination the signing key in there is used
+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
+		copy(pk[:], dest[256:256+128])
+		k = pk
+	}
+	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
+}