huh

LORAWAN

@@ -8,4 +8,14 @@ In the multicast slot pager messages can be send to a multicast group that is al
 
 In that way receive only devices can receive messages.
 
+"
+Messages can be ―unicast‖ or ―multicast‖. Unicast messages are sent to a single end-device
+and multicast messages are sent to multiple end-devices. All devices of a multicast group
+must share the same multicast address and associated encryption keys. The LoRaWAN
+Class B specification does not specify means to remotely setup such a multicast group or
+securely distribute the required multicast key material. This must either be performed during
+the node personalization or through the application layer.
+"
 
+
+http://thethingsnetwork.org/wiki/Hardware/OverviewNodes 

README

@@ -6,3 +6,8 @@ to try it out:
     apt-get install arduino arduino-mk
 - get the required libraries from https://gitlab.net.020wireless.nl/yids/arduino-build
 
+some things on ECC:
+
+http://www.infosecwriters.com/Papers/Anoopms_ECC.pdf
+http://www.johannes-bauer.com/compsci/ecc/
+

arduino-rx/Makefile

+
+USER_LIB_PATH=../arduino-build/libraries/
 BOARD_TAG=atmega328
 ARDUINO_LIBS=RadioHead SPI AESLib Wire LCDI2C_LK162
 include /usr/share/arduino/Arduino.mk

base-tx/packets.h

@@ -4,10 +4,43 @@
 
 struct pagermessage 
 {
-  // there is no space to store all pubkeys of possible senders, so need to be send
-  EccPoint senderPubkey;
+  //Will be filled in with the compressed public key. Must be at least
+  //                   (curve size + 1) bytes long; for example, if the curve is secp256r1,
+  //                   compressed must be 33 bytes long.
+  
+  uint8_t senderpubkey[33];
+    //
   // address is SHA1 hash of publickey
   int address; 
   // maybe use 7bit ascii, or even smaller characters (only letters +  numbers)
   char msg[127];
 }
+
+/* subjectPublicKeyInfo field
+ *    in X.509 certificates [PKI]
+ * https://www.ietf.org/rfc/rfc5480.txt
+ * https://tools.ietf.org/html/rfc5915
+ */
+
+/*
+ * gpg
+ *   A V4 fingerprint is the 160-bit SHA-1 hash of the octet 0x99,
+ *      followed by the two-octet packet length, followed by the entire
+ *         Public-Key packet starting with the version field.  The Key ID is the
+ *            low-order 64 bits of the fingerprint.  Here are the fields of the
+ *               hash material, with the example of a DSA key:
+ */
+
+
+/* lorawan
+Rate    Max payload size
+0       51
+1       51
+2       51
+3       115
+4       222
+5       222
+6       222
+7       222
+8:15    not defined
+*/