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Diffstat (limited to 'src/ao_radio_cmac.c')
-rw-r--r--src/ao_radio_cmac.c278
1 files changed, 203 insertions, 75 deletions
diff --git a/src/ao_radio_cmac.c b/src/ao_radio_cmac.c
index 7648a2f5..9694b5b3 100644
--- a/src/ao_radio_cmac.c
+++ b/src/ao_radio_cmac.c
@@ -17,27 +17,24 @@
#include "ao.h"
-#define AO_CMAC_KEY_LEN 16
+#define AO_CMAC_KEY_LEN AO_AES_LEN
#define AO_CMAC_MAX_LEN (128 - AO_CMAC_KEY_LEN)
-static __xdata uint8_t cmac_key[AO_CMAC_KEY_LEN];
+static __xdata uint8_t ao_radio_cmac_mutex;
static __xdata uint8_t cmac_data[AO_CMAC_MAX_LEN + AO_CMAC_KEY_LEN + 2 + AO_CMAC_KEY_LEN];
static __pdata uint8_t ao_radio_cmac_len;
static uint8_t
getnibble(void)
{
- __pdata char c;
-
- c = getchar();
- if ('0' <= c && c <= '9')
- return c - '0';
- if ('a' <= c && c <= 'f')
- return c - ('a' - 10);
- if ('A' <= c && c <= 'F')
- return c - ('A' - 10);
- ao_cmd_status = ao_cmd_lex_error;
- return 0;
+ int8_t b;
+
+ b = ao_cmd_hexchar(getchar());
+ if (b < 0) {
+ ao_cmd_status = ao_cmd_lex_error;
+ return 0;
+ }
+ return (uint8_t) b;
}
static uint8_t
@@ -49,20 +46,137 @@ getbyte(void)
return b;
}
+static uint8_t
+round_len(uint8_t len)
+{
+ uint8_t rem;
+
+ /* Make sure we transfer at least one packet, and
+ * then make sure every packet is full. Note that
+ * there is no length encoded, and that the receiver
+ * must deal with any extra bytes in the packet
+ */
+ if (len < AO_CMAC_KEY_LEN)
+ len = AO_CMAC_KEY_LEN;
+ rem = len % AO_CMAC_KEY_LEN;
+ if (rem != 0)
+ len += (AO_CMAC_KEY_LEN - rem);
+ return len;
+}
+
+/*
+ * Sign and deliver the data sitting in the cmac buffer
+ */
static void
-ao_radio_cmac_key(void) __reentrant
+radio_cmac_send(uint8_t len) __reentrant
{
uint8_t i;
- for (i = 0; i < AO_CMAC_KEY_LEN; i++) {
- cmac_key[i] = getbyte();
- if (ao_cmd_status != ao_cmd_success)
- return;
+ len = round_len(len);
+ /* Make sure the AES key is loaded */
+ ao_config_get();
+
+#if HAS_MONITOR
+ ao_set_monitor(0);
+#endif
+
+ ao_mutex_get(&ao_aes_mutex);
+ ao_aes_set_mode(ao_aes_mode_cbc_mac);
+ ao_aes_set_key(ao_config.aes_key);
+ ao_aes_zero_iv();
+ for (i = 0; i < len; i += AO_CMAC_KEY_LEN) {
+ if (i + AO_CMAC_KEY_LEN < len)
+ ao_aes_run(&cmac_data[i], NULL);
+ else
+ ao_aes_run(&cmac_data[i], &cmac_data[len]);
}
+ ao_mutex_put(&ao_aes_mutex);
+
+ ao_radio_send(cmac_data, len + AO_CMAC_KEY_LEN);
+}
+
+/*
+ * Receive and validate an incoming packet
+ */
+
+static int8_t
+radio_cmac_recv(uint8_t len, uint16_t timeout) __reentrant
+{
+ uint8_t i;
+
+ len = round_len(len);
+#if HAS_MONITOR
+ ao_set_monitor(0);
+#endif
+ if (timeout)
+ ao_alarm(timeout);
+
+ i = ao_radio_recv(cmac_data, len + AO_CMAC_KEY_LEN + 2);
+ ao_clear_alarm();
+
+ if (!i)
+ return AO_RADIO_CMAC_TIMEOUT;
+
+ if (!(cmac_data[len + AO_CMAC_KEY_LEN +1] & PKT_APPEND_STATUS_1_CRC_OK))
+ return AO_RADIO_CMAC_CRC_ERROR;
+
+ ao_config_get();
+
+ /* Compute the packet signature
+ */
+ ao_mutex_get(&ao_aes_mutex);
+ ao_aes_set_mode(ao_aes_mode_cbc_mac);
+ ao_aes_set_key(ao_config.aes_key);
+ ao_aes_zero_iv();
+ for (i = 0; i < len; i += AO_CMAC_KEY_LEN) {
+ if (i + AO_CMAC_KEY_LEN < len)
+ ao_aes_run(&cmac_data[i], NULL);
+ else
+ ao_aes_run(&cmac_data[i], &cmac_data[len + AO_CMAC_KEY_LEN + 2]);
+ }
+ ao_mutex_put(&ao_aes_mutex);
+
+ /* Check the packet signature against the signature provided
+ * over the link
+ */
+
+ if (memcmp(&cmac_data[len],
+ &cmac_data[len + AO_CMAC_KEY_LEN + 2],
+ AO_CMAC_KEY_LEN) != 0) {
+ return AO_RADIO_CMAC_MAC_ERROR;
+ }
+
+ return AO_RADIO_CMAC_OK;
+}
+
+int8_t
+ao_radio_cmac_send(__xdata void *packet, uint8_t len) __reentrant
+{
+ if (len > AO_CMAC_MAX_LEN)
+ return AO_RADIO_CMAC_LEN_ERROR;
+ ao_mutex_get(&ao_radio_cmac_mutex);
+ memcpy(cmac_data, packet, len);
+ radio_cmac_send(len);
+ ao_mutex_put(&ao_radio_cmac_mutex);
+ return AO_RADIO_CMAC_OK;
+}
+
+int8_t
+ao_radio_cmac_recv(__xdata void *packet, uint8_t len, uint16_t timeout) __reentrant
+{
+ uint8_t i;
+ if (len > AO_CMAC_MAX_LEN)
+ return AO_RADIO_CMAC_LEN_ERROR;
+ ao_mutex_get(&ao_radio_cmac_mutex);
+ i = radio_cmac_recv(len, timeout);
+ if (i == AO_RADIO_CMAC_OK)
+ memcpy(packet, cmac_data, len);
+ ao_mutex_put(&ao_radio_cmac_mutex);
+ return i;
}
static void
-ao_radio_cmac_send(void) __reentrant
+radio_cmac_send_cmd(void) __reentrant
{
uint8_t i;
uint8_t len;
@@ -70,43 +184,25 @@ ao_radio_cmac_send(void) __reentrant
ao_cmd_decimal();
if (ao_cmd_status != ao_cmd_success)
return;
- if (ao_cmd_lex_i < AO_CMAC_KEY_LEN ||
- ao_cmd_lex_i > AO_CMAC_MAX_LEN ||
- ao_cmd_lex_i % AO_CMAC_KEY_LEN != 0)
- {
+ len = ao_cmd_lex_i;
+ if (len > AO_CMAC_MAX_LEN) {
ao_cmd_status = ao_cmd_syntax_error;
return;
}
flush();
+ ao_mutex_get(&ao_radio_cmac_mutex);
len = ao_cmd_lex_i;
for (i = 0; i < len; i++) {
cmac_data[i] = getbyte();
if (ao_cmd_status != ao_cmd_success)
return;
}
- ao_mutex_get(&ao_aes_mutex);
- ao_aes_set_mode(ao_aes_mode_cbc_mac);
- ao_aes_set_key(cmac_key);
- ao_aes_zero_iv();
- for (i = 0; i < len; i += AO_CMAC_KEY_LEN) {
- if (i + AO_CMAC_KEY_LEN < len)
- ao_aes_run(&cmac_data[i], NULL);
- else
- ao_aes_run(&cmac_data[i], &cmac_data[len]);
- }
- ao_mutex_put(&ao_aes_mutex);
-#if HAS_MONITOR
- ao_set_monitor(0);
-#endif
- printf("send:");
- for (i = 0; i < len + AO_CMAC_KEY_LEN; i++)
- printf(" %02x", cmac_data[i]);
- printf("\n"); flush();
- ao_radio_send(cmac_data, len + AO_CMAC_KEY_LEN);
+ radio_cmac_send(len);
+ ao_mutex_put(&ao_radio_cmac_mutex);
}
static void
-ao_radio_cmac_recv(void) __reentrant
+radio_cmac_recv_cmd(void) __reentrant
{
uint8_t len, i;
uint16_t timeout;
@@ -114,47 +210,79 @@ ao_radio_cmac_recv(void) __reentrant
ao_cmd_decimal();
if (ao_cmd_status != ao_cmd_success)
return;
- if (ao_cmd_lex_i < AO_CMAC_KEY_LEN ||
- ao_cmd_lex_i > AO_CMAC_MAX_LEN ||
- ao_cmd_lex_i % AO_CMAC_KEY_LEN != 0)
- {
- ao_cmd_status = ao_cmd_syntax_error;
- return;
- }
len = ao_cmd_lex_i;
ao_cmd_decimal();
if (ao_cmd_status != ao_cmd_success)
return;
- timeout = ao_cmd_lex_i;
-#if HAS_MONITOR
- ao_set_monitor(0);
-#endif
- if (timeout)
- ao_alarm(timeout);
- if (!ao_radio_recv(cmac_data, len + AO_CMAC_KEY_LEN + 2)) {
- printf("timeout\n");
+ timeout = AO_MS_TO_TICKS(ao_cmd_lex_i);
+ ao_mutex_get(&ao_radio_cmac_mutex);
+ i = radio_cmac_recv(len, timeout);
+ if (i == AO_RADIO_CMAC_OK) {
+ printf ("PACKET ");
+ for (i = 0; i < len; i++)
+ printf("%02x", cmac_data[i]);
+ printf ("\n");
+ } else
+ printf ("ERROR %d\n", i);
+ ao_mutex_put(&ao_radio_cmac_mutex);
+}
+
+static void
+launch_report_cmd(void) __reentrant
+{
+ static __xdata struct ao_launch_command command;
+ static __xdata struct ao_launch_query query;
+ uint8_t channel;
+ uint16_t serial;
+ uint8_t i;
+
+ ao_cmd_decimal();
+ serial = ao_cmd_lex_i;
+ ao_cmd_decimal();
+ channel = ao_cmd_lex_i;
+ if (ao_cmd_status != ao_cmd_success)
return;
+ flush();
+ for (i = 0; i < 10; i++) {
+ printf ("."); flush();
+ command.tick = 0;
+ command.serial = serial;
+ command.cmd = AO_LAUNCH_QUERY;
+ command.channel = channel;
+ ao_radio_cmac_send(&command, sizeof (command));
+ switch (ao_radio_cmac_recv(&query, sizeof (query), AO_MS_TO_TICKS(500))) {
+ case AO_RADIO_CMAC_OK:
+ printf("\n");
+ switch (query.arm_status) {
+ case ao_igniter_ready:
+ case ao_igniter_active:
+ printf ("Armed: ");
+ switch (query.igniter_status) {
+ default:
+ printf("unknown status\n");
+ break;
+ case ao_igniter_ready:
+ printf("igniter good\n");
+ break;
+ case ao_igniter_open:
+ printf("igniter bad\n");
+ break;
+ }
+ default:
+ printf("Disarmed\n");
+ }
+ return;
+ default:
+ continue;
+ }
}
- ao_mutex_get(&ao_aes_mutex);
- ao_aes_set_mode(ao_aes_mode_cbc_mac);
- ao_aes_set_key(cmac_key);
- ao_aes_zero_iv();
- for (i = 0; i < len; i += AO_CMAC_KEY_LEN) {
- if (i + AO_CMAC_KEY_LEN < len)
- ao_aes_run(&cmac_data[i], NULL);
- else
- ao_aes_run(&cmac_data[i], &cmac_data[len + AO_CMAC_KEY_LEN + 2]);
- }
- printf ("PACKET ");
- for (i = 0; i < len + AO_CMAC_KEY_LEN + 2 + AO_CMAC_KEY_LEN; i++)
- printf("%02x", cmac_data[i]);
- printf ("\n");
+ printf ("Timeout\n");
}
static __code struct ao_cmds ao_radio_cmac_cmds[] = {
- { ao_radio_cmac_key, "k\0Set AES-CMAC key. 16 key bytes follow on next line" },
- { ao_radio_cmac_send, "s <length>\0Send AES-CMAC packet. Bytes to send follow on next line" },
- { ao_radio_cmac_recv, "S <length> <timeout>\0Receive AES-CMAC packet. Timeout in ms" },
+ { radio_cmac_send_cmd, "s <length>\0Send AES-CMAC packet. Bytes to send follow on next line" },
+ { radio_cmac_recv_cmd, "S <length> <timeout>\0Receive AES-CMAC packet. Timeout in ms" },
+ { launch_report_cmd, "l <serial> <channel>\0Get remote launch status" },
{ 0, NULL },
};
generated by cgit v1.2.3 (git 2.39.1) at 2025-11-04 03:17:32 +0000