Merge pull request #1792 from meshtastic/atecca

Support for ATECCA608B Cryptographic Coprocessor

arch/rp2040/rp2040.ini

@@ -1,6 +1,6 @@
 ; Common settings for rp2040 Processor based targets
 [rp2040_base]
-platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git#5ce1a228e7cae453f366deb8962252b9b7356bbc
 extends = arduino_base
 board_build.core = earlephilhower
 board_build.filesystem_size = 0.5m

platformio.ini

@@ -65,6 +65,7 @@ lib_deps =
   ${env.lib_deps}
   ; Portduino is using meshtastic fork for now
   jgromes/RadioLib@5.4.1
+  https://github.com/caveman99/SparkFun_ATECCX08a_Arduino_Library.git#008e7f9d40bad66b2f7a0074aaac05b7c424339d
 
 build_flags = ${env.build_flags} -Os 
   -DRADIOLIB_SPI_PARANOID=0

src/configuration.h

@@ -110,6 +110,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define INA_ADDR_ALTERNATE 0x41
 #define QMC6310_ADDR 0x1C
 #define QMI8658_ADDR 0x6B
+
+// -----------------------------------------------------------------------------
+// Security
+// -----------------------------------------------------------------------------
+
+#define ATECC608B_ADDR 0x35
+
 // -----------------------------------------------------------------------------
 // GPS
 // -----------------------------------------------------------------------------

src/detect/i2cScan.h

@@ -9,6 +9,41 @@
 #endif
 
 #if HAS_WIRE
+
+void printATECCInfo()
+{
+#ifndef ARCH_PORTDUINO
+    atecc.readConfigZone(false);
+
+    DEBUG_MSG("ATECC608B Serial Number: ");
+    for (int i = 0 ; i < 9 ; i++) {
+        DEBUG_MSG("%02x",atecc.serialNumber[i]);
+    }
+
+    DEBUG_MSG(", Rev Number: ");
+    for (int i = 0 ; i < 4 ; i++) {
+        DEBUG_MSG("%02x",atecc.revisionNumber[i]);
+    }
+    DEBUG_MSG("\n");
+
+    DEBUG_MSG("ATECC608B Config %s",atecc.configLockStatus ? "Locked" : "Unlocked");
+    DEBUG_MSG(", Data %s",atecc.dataOTPLockStatus ? "Locked" : "Unlocked");
+    DEBUG_MSG(", Slot 0 %s\n",atecc.slot0LockStatus ? "Locked" : "Unlocked");
+
+    if (atecc.configLockStatus && atecc.dataOTPLockStatus && atecc.slot0LockStatus) {
+        if (atecc.generatePublicKey() == false) {
+            DEBUG_MSG("ATECC608B Error generating public key\n");
+        } else {
+            DEBUG_MSG("ATECC608B Public Key: ");
+            for (int i = 0 ; i < 64 ; i++) {
+                DEBUG_MSG("%02x",atecc.publicKey64Bytes[i]);
+            }
+            DEBUG_MSG("\n");
+        }
+    }
+#endif
+}
+
 uint16_t getRegisterValue(uint8_t address, uint8_t reg, uint8_t length) {
     uint16_t value = 0x00;
     Wire.beginTransmission(address);
@@ -79,6 +114,17 @@ void scanI2Cdevice(void)
                     DEBUG_MSG("unknown display found\n");
                 }
             }
+#ifndef ARCH_PORTDUINO
+            if (addr == ATECC608B_ADDR){
+                keystore_found = addr;
+                if (atecc.begin(keystore_found) == true) {
+                    DEBUG_MSG("ATECC608B initialized\n");
+                } else {
+                    DEBUG_MSG("ATECC608B initialization failed\n");
+                }
+                printATECCInfo();
+            }
+#endif
 #ifdef RV3028_RTC
             if (addr == RV3028_RTC){
                 rtc_found = addr;

src/main.cpp

@@ -80,6 +80,12 @@ uint8_t kb_model;
 // The I2C address of the RTC Module (if found)
 uint8_t rtc_found;
 
+// Keystore Chips
+uint8_t keystore_found;
+#ifndef ARCH_PORTDUINO
+ATECCX08A atecc;
+#endif
+
 bool eink_found = true;
 
 uint32_t serialSinceMsec;

src/main.h

@@ -6,18 +6,26 @@
 #include "PowerStatus.h"
 #include "graphics/Screen.h"
 #include "mesh/generated/telemetry.pb.h"
+#ifndef ARCH_PORTDUINO
+#include <SparkFun_ATECCX08a_Arduino_Library.h>
+#endif
 
 extern uint8_t screen_found;
 extern uint8_t screen_model;
 extern uint8_t cardkb_found;
 extern uint8_t kb_model;
 extern uint8_t rtc_found;
+extern uint8_t keystore_found;
 
 extern bool eink_found;
 extern bool pmu_found;
 extern bool isCharging;
 extern bool isUSBPowered;
 
+#ifndef ARCH_PORTDUINO
+extern ATECCX08A atecc;
+#endif
+
 extern uint8_t nodeTelemetrySensorsMap[TelemetrySensorType_QMI8658+1];
 
 extern int TCPPort; // set by Portduino

variants/rpipico/platformio.ini

@@ -1,12 +1,12 @@
 [env:pico]
 extends = rp2040_base
-board = pico
+board = rpipico
 upload_protocol = picotool
 
 # add our variants files to the include and src paths
 build_flags = ${rp2040_base.build_flags} 
   -DPRIVATE_HW
-  -Ivariants/pico
+  -Ivariants/rpipico
   -DARDUINO_AVR_NANO_EVERY
   -DDEBUG_RP2040_WIRE
   -DDEBUG_RP2040_SPI

variants/rpipicow/platformio.ini

@@ -0,0 +1,17 @@
+[env:picow]
+extends = rp2040_base
+board = rpipicow
+upload_protocol = picotool
+
+# add our variants files to the include and src paths
+build_flags = ${rp2040_base.build_flags} 
+  -DPRIVATE_HW
+  -Ivariants/rpipicow
+  -DARDUINO_AVR_NANO_EVERY
+  -DDEBUG_RP2040_WIRE
+  -DDEBUG_RP2040_SPI
+  -DDEBUG_RP2040_CORE
+  -DDEBUG_RP2040_PORT=Serial
+  -DUSE_TINYUSB
+lib_deps =
+  ${rp2040_base.lib_deps}

variants/rpipicow/variant.h

@@ -0,0 +1,52 @@
+// #define RADIOLIB_CUSTOM_ARDUINO 1
+// #define RADIOLIB_TONE_UNSUPPORTED 1
+// #define RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED 1
+
+#define ARDUINO_ARCH_AVR
+
+#define CBC 0
+#define CTR 1
+#define ECB 0
+
+#define NO_GPS 1
+#define USE_SH1106 1
+#undef GPS_SERIAL_NUM
+
+// #define I2C_SDA 6
+// #define I2C_SCL 7
+
+#define BUTTON_PIN 17
+#define EXT_NOTIFY_OUT 4
+
+#define BATTERY_PIN 26
+// ratio of voltage divider = 3.0 (R17=200k, R18=100k)
+#define ADC_MULTIPLIER 3.1 // 3.0 + a bit for being optimistic
+
+#define USE_RF95
+#define USE_SX1262
+
+#undef RF95_SCK
+#undef RF95_MISO
+#undef RF95_MOSI
+#undef RF95_NSS
+
+#define RF95_SCK 10
+#define RF95_MISO 12
+#define RF95_MOSI 11
+#define RF95_NSS 3
+
+#define LORA_DIO0 RADIOLIB_NC
+#define LORA_RESET 15
+#define LORA_DIO1 20
+#define LORA_DIO2 2
+#define LORA_DIO3 RADIOLIB_NC
+
+#ifdef USE_SX1262
+#define SX126X_CS RF95_NSS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+#define SX126X_E22
+#endif
+
+#include <Adafruit_TinyUSB.h>