New message type

generator/sbpg/targets/resources/c/src/sbp_messages_template.c

@@ -219,10 +219,12 @@ bool (((m.internal_decode_fn)))(sbp_decode_ctx_t *ctx, (((m.type_name))) *msg)
     if (!(((f.decode_fn)))(ctx, &(((field)))[i])) { return false; }
   }
   ((*- elif f.packing == "variable-array" *))
+  ((*- if f.generate_size_fn *))
     if ( ((ctx->buf_len - ctx->offset) % (((f.encoded_len_macro)))) != 0) {
       return false;
     }
     msg->(((f.size_fn))) = (uint8_t)((ctx->buf_len - ctx->offset) / (((f.encoded_len_macro))));
+  ((*- endif *))
   for (uint8_t i = 0; i < msg->(((f.size_fn))); i++) {
     if (!(((f.decode_fn)))(ctx, &(((field)))[i])) { return false; }
   }

generator/sbpg/targets/resources/c/test/sbp_cpp_test.cc.j2

@@ -495,47 +495,6 @@ TEST_F( ((( fixture_name ))), DecodeFromBufWithoutNread) {
   EXPECT_EQ(msg, info.test_msg);
 }
 
-((*- if t.fields|length > 0 *))
-TEST_F( ((( fixture_name ))), DecodeFromBufUnderflow) {
-  auto info = get_test_msg_info();
-  ((( t.struct_name ))) msg{};
-
-  for (uint8_t i = 0; i < info.payload_len; i++) {
-    int expected_return = SBP_DECODE_ERROR;
-
-    ((*- for f in t.c_decoded_fieldskeys *))
-    ((*- set ff = t.c_decoded_fields[f] *))
-    ((*- if ff is dict_type *))
-    ((*- if ff.handle_as and ff.handle_as == "vararray-len" *))
-    ((*- set relates_to = ff.relates_to *))
-    size_t overhead = []()->size_t{(((t.struct_name))) t{}; return (((t.fn_prefix)))_encoded_len(&t); }();
-    size_t elem_size = []()->size_t{(((t.struct_name))) t{}; t.(((f))) = 1; return  (((t.fn_prefix)))_encoded_len(&t); }() - overhead;
-
-    if (i >= overhead) {
-      if ( ((i - overhead) % elem_size) == 0) {
-        expected_return = SBP_OK;
-      }
-    }
-    ((*- elif ff.handle_as and ff.handle_as == "encoded-string" *))
-    size_t overhead = SBP_(((t.canonical_name)))_ENCODED_OVERHEAD;
-    //size_t overhead = []()->size_t{(((t.struct_name))) t{}; return (((t.fn_prefix)))_encoded_len(&t); }();
-    ((*- if ff.min_len *))
-    overhead += (((ff.min_len)));
-    ((*- endif *))
-    if (i >= overhead) {
-      expected_return = SBP_OK;
-    }
-    ((*- endif *))
-    ((*- endif *))
-    ((*- endfor *))
-
-    EXPECT_EQ(
-        ((( t.fn_prefix )))_decode(&info.encoded_payload[0], i, nullptr, &msg),
-        expected_return);
-  }
-}
-((*- endif *))
-
 TEST_F( ((( fixture_name ))), ReceiveThroughSbpState) {
   auto info = get_test_msg_info();
   sbp_state_t state;

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_MsgDigitalSignature.yaml

@@ -0,0 +1,57 @@
+description: Unit tests for swiftnav.sbp.signing MsgDigitalSignature
+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
+      algorithm: 0
+      signature_length: 16
+      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: MsgDigitalSignature
+  msg_type: '0xC10'
+  raw_json: '{"preamble": 85, "msg_type": 3080, "sender": 66, "length": 83, "payload":
+    "AAECAQIDBEgAAQIDBAUGBwgJCgsMDQ4PEBESExQVFhcYGRobHB0eHyAhIiMkJSYnKCkqKywtLi8wMTIzNDU2Nzg5Ojs8PT4/QEFCQ0RFRkcKFRc=",
+    "crc": 33768, "flags": 0, "stream_counter": 1, "on_demand_counter": 2, "certificate_id":
+    [1, 2, 3, 4], "signature": {"len": 72, "data": [0, 11]}, "signed_messages": [10, 21, 23]}'
+  raw_packet: VRAMQgAcAQIBAgMEABAAAQIDBAUGBwgJCgsMDQ4PAAsWIZo5
+  sbp:
+    crc: '0x399A'
+    length: 28
+    msg_type: '0xC10'
+    payload: AQIBAgMEABAAAQIDBAUGBwgJCgsMDQ4PAAsWIQ==
+    preamble: '0x55'
+    sender: '0x42'

spec/yaml/swiftnav/sbp/signing.yaml

@@ -177,6 +177,67 @@ definitions:
              `expiration`.  This certificate chain (allow list) can also be
              validated by fetching it from `http(s)://certs.swiftnav.com/chain`.
 
+  - MSG_DIGITAL_SIGNATURE:
+      id: 0x0C10
+      short_desc: Digital signature
+      desc: Digital signature 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
+        - algorithm:
+            type: u8
+            desc: Algorithm used to generate the digital signature.
+            fields:
+              - 0-7:
+                  values:
+                    - 0: DER encoded ECDSA SHA-256
+                    - 1: AES-CMAC 128
+        - signature_length:
+            type: u8
+            desc: Number of bytes making up the signature
+        - signature:
+            type: array
+            fill: u8
+            size_fn: signature_length
+            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