start ctap protocol

ctap.c

@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cbor.h"
+
+#include "ctap.h"
+#include "util.h"
+
+
+
+static void check_ret(CborError ret)
+{
+    if (ret != CborNoError)
+    {
+        printf("CborError: %d: %s\n", ret, cbor_error_string(ret));
+        exit(1);
+    }
+}
+
+
+void ctap_handle_packet(uint8_t * pkt_raw, int length, CTAP_RESPONSE * resp)
+{
+    uint8_t cmd = *pkt_raw;
+    int ret;
+    pkt_raw++;
+
+
+    uint8_t buf[100];
+    memset(buf,0,sizeof(buf));
+
+    resp->data = buf;
+    resp->length = 0;
+
+    CborEncoder encoder;
+    CborEncoder array;
+
+    switch(cmd)
+    {
+        case CTAP_MAKE_CREDENTIAL:
+            printf("CTAP_MAKE_CREDENTIAL\n");
+            break;
+        case CTAP_GET_ASSERTION:
+            printf("CTAP_GET_ASSERTION\n");
+            break;
+        case CTAP_CANCEL:
+            printf("CTAP_CANCEL\n");
+            break;
+        case CTAP_GET_INFO:
+            printf("CTAP_GET_INFO\n");
+
+            cbor_encoder_init(&encoder, buf, sizeof(buf), 0);
+
+            ret = cbor_encoder_create_array(&encoder, &array, 2);
+            check_ret(ret);
+
+            ret = cbor_encode_text_stringz(&array, "1.0");
+            check_ret(ret);
+            ret = cbor_encode_text_stringz(&array, "2.0");
+            check_ret(ret);
+
+            ret = cbor_encoder_close_container(&encoder, &array);
+            check_ret(ret);
+
+            dump_hex(buf, cbor_encoder_get_buffer_size(&encoder, buf));
+
+            resp->length = cbor_encoder_get_buffer_size(&encoder, buf);
+
+            break;
+        case CTAP_CLIENT_PIN:
+            printf("CTAP_CLIENT_PIN\n");
+            break;
+        case CTAP_RESET:
+            printf("CTAP_RESET\n");
+            break;
+        case GET_NEXT_ASSERTION:
+            printf("CTAP_NEXT_ASSERTION\n");
+            break;
+        default:
+            printf("error, invalid cmd\n");
+    }
+
+    printf("cbor structure: %d bytes\n", length - 1);
+}