Added _kx_ and nateive impl, updated libsodium submodule to latest commit

2020-10-09 16:56:09 +02:00
1 parent f4d6d941c9
commit bd173f422f
@@ -0,0 +1,99 @@
+package com.ionspin.kotlin.crypto.keyexchange
+
+import com.ionspin.kotlin.crypto.util.toPtr
+import kotlinx.cinterop.pin
+import libsodium.crypto_kx_client_session_keys
+import libsodium.crypto_kx_keypair
+import libsodium.crypto_kx_seed_keypair
+import libsodium.crypto_kx_server_session_keys
+
+/**
+ * Created by Ugljesa Jovanovic
+ * ugljesa.jovanovic@ionspin.com
+ * on 09-Oct-2020
+ */
+actual object KeyExchange {
+    actual fun clientSessionKeys(clientPublicKey: UByteArray, clientSecretKey: UByteArray, serverPublicKey: UByteArray) : KeyExchangeSessionKeyPair {
+        val receiveKey = UByteArray(crypto_kx_SESSIONKEYBYTES)
+        val sendKey = UByteArray(crypto_kx_SESSIONKEYBYTES)
+
+        val clientPublicKeyPinned = clientPublicKey.pin()
+        val clientSecretKeyPinned = clientSecretKey.pin()
+        val serverPublicKeyPinned = serverPublicKey.pin()
+        val receiveKeyPinned = receiveKey.pin()
+        val sendKeyPinned = sendKey.pin()
+
+        crypto_kx_client_session_keys(
+            receiveKeyPinned.toPtr(),
+            sendKeyPinned.toPtr(),
+            clientPublicKeyPinned.toPtr(),
+            clientSecretKeyPinned.toPtr(),
+            serverPublicKeyPinned.toPtr()
+        )
+
+        clientPublicKeyPinned.unpin()
+        clientSecretKeyPinned.unpin()
+        serverPublicKeyPinned.unpin()
+        receiveKeyPinned.unpin()
+        sendKeyPinned.unpin()
+
+        return KeyExchangeSessionKeyPair(receiveKey, sendKey)
+    }
+
+    actual fun keypair() : KeyExchangeKeyPair {
+        val publicKey = UByteArray(crypto_kx_PUBLICKEYBYTES)
+        val secretKey = UByteArray(crypto_kx_SECRETKEYBYTES)
+
+        val publicKeyPinned = publicKey.pin()
+        val secretKeyPinned = secretKey.pin()
+        crypto_kx_keypair(publicKeyPinned.toPtr(), secretKeyPinned.toPtr())
+        publicKeyPinned.unpin()
+        secretKeyPinned.unpin()
+
+        return KeyExchangeKeyPair(publicKey, secretKey)
+    }
+
+    actual fun seedKeypair(seed: UByteArray) : KeyExchangeKeyPair {
+        val publicKey = UByteArray(crypto_kx_PUBLICKEYBYTES)
+        val secretKey = UByteArray(crypto_kx_SECRETKEYBYTES)
+
+        val seedPinned = seed.pin()
+        val publicKeyPinned = publicKey.pin()
+        val secretKeyPinned = secretKey.pin()
+
+        crypto_kx_seed_keypair(publicKeyPinned.toPtr(), secretKeyPinned.toPtr(), seedPinned.toPtr())
+
+        publicKeyPinned.unpin()
+        secretKeyPinned.unpin()
+        seedPinned.unpin()
+
+        return KeyExchangeKeyPair(publicKey, secretKey)
+    }
+
+    actual fun serverSessionKeys(serverPublicKey: UByteArray, serverSecretKey: UByteArray, clientPublicKey: UByteArray) : KeyExchangeSessionKeyPair {
+        val receiveKey = UByteArray(crypto_kx_SESSIONKEYBYTES)
+        val sendKey = UByteArray(crypto_kx_SESSIONKEYBYTES)
+
+        val serverPublicKeyPinned = serverPublicKey.pin()
+        val serverSecretKeyPinned = serverSecretKey.pin()
+        val clientPublicKeyPinned = clientPublicKey.pin()
+        val receiveKeyPinned = receiveKey.pin()
+        val sendKeyPinned = sendKey.pin()
+
+        crypto_kx_server_session_keys(
+            receiveKeyPinned.toPtr(),
+            sendKeyPinned.toPtr(),
+            serverPublicKeyPinned.toPtr(),
+            serverSecretKeyPinned.toPtr(),
+            clientPublicKeyPinned.toPtr()
+        )
+
+        serverPublicKeyPinned.unpin()
+        serverSecretKeyPinned.unpin()
+        clientPublicKeyPinned.unpin()
+        receiveKeyPinned.unpin()
+        sendKeyPinned.unpin()
+
+        return KeyExchangeSessionKeyPair(receiveKey, sendKey)
+    }
+}