AES-CMAC messageg

python/tests/sbp/test_table.py

@@ -44,7 +44,7 @@ def test_table_count():
   Test number of available messages to deserialize.
 
   """
-  number_of_messages = 237
+  number_of_messages = 238
   assert len(_SBP_TABLE) == number_of_messages
 
 def test_table_unqiue_count():

spec/tests/yaml/swiftnav/sbp/signing/test_MsgAesCmacSignature.yaml

@@ -0,0 +1,52 @@
+description: Unit tests for swiftnav.sbp.signing MsgAesCmacSignature
+generated_on: '2023-03-17 19:24:46.292191'
+package: sbp.signing
+tests:
+- msg:
+    c_decoded_fields:
+      n_signed_messages:
+        handle_as: vararray-len
+        relates_to: signed_messages
+        value: 3
+    fields:
+      stream_counter: 1
+      on_demand_counter: 2
+      certificate_id:
+        - 1
+        - 2
+        - 3
+        - 4
+      signature:
+        - 0
+        - 1
+        - 2
+        - 3
+        - 4
+        - 5
+        - 6
+        - 7
+        - 8
+        - 9
+        - 10
+        - 11
+        - 12
+        - 13
+        - 14
+        - 15
+      flags: 0
+      signed_messages:
+      - 11
+      - 22
+      - 33
+    module: sbp.signing
+    name: MsgAesCmacSignature
+  msg_type: '0xC10'
+  raw_json: '{"crc":5568,"length":26,"msg_type":3088,"msg_name":"MSG_AES_CMAC_SIGNATURE","payload":"AQIBAgMEAAECAwQFBgcICQoLDA0ODwALFiE=","preamble":85,"sender":66,"stream_counter":1,"on_demand_counter":2,"certificate_id":[1,2,3,4],"signature":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15],"flags":0,"signed_messages":[11,22,33]}'
+  raw_packet: VRAMQgAaAQIBAgMEAAECAwQFBgcICQoLDA0ODwALFiHAFQ==
+  sbp:
+    crc: '0x15C0'
+    length: 26
+    msg_type: '0xC10'
+    payload: AQIBAgMEAAECAwQFBgcICQoLDA0ODwALFiE=
+    preamble: '0x55'
+    sender: '0x42'

spec/yaml/swiftnav/sbp/signing.yaml

@@ -177,6 +177,56 @@ definitions:
              `expiration`.  This certificate chain (allow list) can also be
              validated by fetching it from `http(s)://certs.swiftnav.com/chain`.
 
+  - MSG_AES_CMAC_SIGNATURE:
+      id: 0x0C10
+      short_desc: AES-CMAC 128 digital signature
+      desc: Digital signature using AES-CMAC 128 algorithm used for data integrity.
+      fields:
+        - stream_counter:
+            type: u8
+            desc: >
+              Signature message counter. Zero indexed and incremented with each
+              signature message.  The counter will not increment if this message
+              was in response to an on demand request.  The counter will roll
+              over after 256 messages. Upon connection, the value of the counter
+              may not initially be zero.
+        - on_demand_counter:
+            type: u8
+            desc: >
+              On demand message counter. Zero indexed and incremented with each
+              signature message sent in response to an on demand message. The
+              counter will roll over after 256 messages.  Upon connection, the
+              value of the counter may not initially be zero.
+        - certificate_id:
+            type: array
+            fill: u8
+            size: 4
+            desc: The last 4 bytes of the certificate's SHA-1 fingerprint
+        - signature:
+            type: array
+            fill: u8
+            size: 16
+            desc: Signature
+        - flags:
+            type: u8
+            desc: Describes the format of the 'signed messages' field below.
+            fields:
+              - 0-1:
+                  desc: CRC type
+                  values:
+                    - 0: 24-bit CRCs from RTCM framing
+                    - 1: 16-bit CRCs from SBP framing
+        - signed_messages:
+            type: array
+            fill: u8
+            desc: >
+              CRCs of the messages covered by this signature.  For Skylark,
+              which delivers SBP messages wrapped in Swift's proprietary RTCM
+              message, these are the 24-bit CRCs from the RTCM message framing.
+              For SBP only streams, this will be 16-bit CRCs from the SBP
+              framing.  See the `flags` field to determine the type of CRCs
+              covered.
+
   - MSG_ECDSA_SIGNATURE:
       id: 0x0C08
       short_desc: An ECDSA signature