feat: create key exchange (#497)

* create key exchange * missing import statement
mailchain · Jan 5, 2020 · dad75b5 · dad75b5
1 parent 6766057
commit dad75b5
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/crypto/cipher/keyexchange.go b/crypto/cipher/keyexchange.go
@@ -0,0 +1,13 @@
+package cipher
+
+import (
+	"github.com/mailchain/mailchain/crypto"
+)
+
+type KeyExchange interface {
+	// EphemeralKey generates a private/public key pair.
+	EphemeralKey() (private crypto.PrivateKey, public crypto.PublicKey, err error)
+
+	// SharedSecret computes a secret value from ephemeralKey private key and recipientKey public key.
+	SharedSecret(ephemeralKey crypto.PrivateKey, recipientKey crypto.PublicKey) ([]byte, error)
+}