some lease set work

lib/common/lease_set.go

@@ -1,78 +1,82 @@
 package common
 
 import (
+	"errors"
 	"github.com/bounce-chat/go-i2p/lib/crypto"
 )
 
 type LeaseSet []byte
 
-func (lease_set LeaseSet) Destination() Destination {
-	return Destination(lease_set[:387]) // read a keys and cert, cast to destination
-}
-
-func (lease_set LeaseSet) EncryptionKey() (k crypto.ElgPublicKey) {
-	copy(lease_set[387:387+256], k[:])
+func (lease_set LeaseSet) Destination() (destination Destination, err error) {
+	keys_and_cert, _, err := ReadKeysAndCert(lease_set)
+	destination = Destination(keys_and_cert)
 	return
 }
 
-func (lease_set LeaseSet) SigningKey() (k []byte) {
-	size := lease_set.signingKeySize()
-	head := 387 + 256
-	copy(lease_set[head:head+size], k)
+func (lease_set LeaseSet) PublicKey() (public_key crypto.ElgPublicKey, err error) {
+	_, remainder, err := ReadKeysAndCert(lease_set)
+	if len(remainder) < 256 {
+		err = errors.New("error parsing public key: not enough data")
+		copy(public_key[:], remainder)
+		return
+	}
+	copy(public_key[:], remainder[:256])
 	return
 }
 
-func (lease_set LeaseSet) LeaseCount() int {
-	head := 387 + 256 + lease_set.signingKeySize()
-	return Integer([]byte{lease_set[head+1]})
+func (lease_set LeaseSet) SigningKey() (signing_public_key crypto.SigningPublicKey, err error) {
+	// check if the destination has a cert, if its a key cert, etc
+	return
+}
+
+func (lease_set LeaseSet) LeaseCount() (count int, err error) {
+	_, remainder, err := ReadKeysAndCert(lease_set)
+	if err != nil {
+		return
+	}
+	if len(remainder) < 256+128+1 {
+		err = errors.New("error parsing lease count: not enough data")
+		return
+	}
+	count = Integer([]byte{remainder[256+128]})
+	return
 }
 
 func (lease_set LeaseSet) Leases() []Lease {
 	leases := make([]Lease, 0)
-	offset := 387 + 256 + lease_set.signingKeySize() + 1
-	for i := 0; i < lease_set.LeaseCount(); i++ {
+	offset := 0
+	count, err := lease_set.LeaseCount()
+	if err != nil {
+		return leases
+	}
+	// read as many as possible, returning errors
+	for i := 0; i < count; i++ {
 		start := offset + (i * 44)
 		end := offset + (start + 44)
 		var lease Lease
-		copy(lease_set[start:end], lease[:])
+		copy(lease[:], lease_set[start:end])
 		leases = append(leases, lease)
 	}
 	return leases
 }
 
-func (lease_set LeaseSet) Signature() []byte {
-	data_end := 387 +
-		256 +
-		lease_set.signingKeySize() +
-		1 +
-		(44 * lease_set.LeaseCount())
-	//sig_cert, _ := lease_set.
-	//	Destination().
-	//	Certificate()
-	//sig_size, _ := sig_cert.SignatureSize()
-	return lease_set[data_end : data_end+128] //sig_size]
+func (lease_set LeaseSet) Signature() (signature Signature, err error) {
+	return
 }
 
 func (lease_set LeaseSet) Verify() error {
-	data_end := 387 +
-		256 +
-		lease_set.signingKeySize() +
-		1 +
-		(44 * lease_set.LeaseCount())
-	data := lease_set[:data_end]
-	spk, _ := lease_set.
-		Destination().
-		SigningPublicKey()
-	verifier, err := spk.NewVerifier()
-	if err != nil {
-		return err
-	}
-	return verifier.Verify(data, lease_set.Signature())
-}
-
-func (lease_set LeaseSet) signingKeySize() int {
-	spk, _ := lease_set.
-		Destination().
-		SigningPublicKey()
-	return spk.Len()
+	//data_end := 387 +
+	//	256 +
+	//	lease_set.signingKeySize() +
+	//	1 +
+	//	(44 * lease_set.LeaseCount())
+	//data := lease_set[:data_end]
+	//spk, _ := lease_set.
+	//	Destination().
+	//	SigningPublicKey()
+	//verifier, err := spk.NewVerifier()
+	//if err != nil {
+	//	return err
+	//}
+	return nil // verifier.Verify(data, lease_set.Signature())
 }

lib/common/router_info.go

@@ -90,10 +90,10 @@ func (router_info RouterInfo) Options() Mapping {
 //
 // Return the 40 bytes that follow the Mapping in the RouterInfo.
 //
-func (router_info RouterInfo) Signature() []byte {
+func (router_info RouterInfo) Signature() Signature {
 	head := router_info.optionsLocation()
 	size := head + router_info.optionsSize()
-	return router_info[head+size : head+size+40]
+	return Signature(router_info[head+size : head+size+40])
 }
 
 //

lib/common/signature.go

@@ -0,0 +1,3 @@
+package common
+
+type Signature []byte

lib/common/signature_test.go

@@ -0,0 +1 @@
+package common