【随笔记】ATECC608 加密芯片调试记录

芯片通信测试

根据芯片手册，ATECC608B 的 7bit 器件地址是：0x35

root@linux:/usr/bin# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- 35 -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
50: -- UU 52 53 -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

下载必要文件

大多数加密芯片都是由原厂提供库文件，便于降低开发难度。

官网下载：CryptoAuthLib

https://www.microchip.com/en-us/software-library/cryptoauthlib
https://codeload.github.com/MicrochipTech/cryptoauthlib/zip/refs/tags/v3.3.3

编译库文件的版本只需要最低 cmake 2.6.4 版本，但是测试程序最低 cmake 3.10

官网下载：
https://cmake.org/files/v3.10/cmake-3.10.3-Linux-x86_64.tar.gz

解压并设置好环境变量：
export PATH=/home/lmx/work/tmp/cmake-3.10.3-Linux-x86_64/bin:$PATH

移植编译源码

配置编译工具链

建立新的配置文件，指定编译工具链的位置：xxx_linux_toolchain.cmake

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_TOOLCHAIN_PATH /home/lmx/work/xxx/lichee/out/gcc-linaro-5.3.1-2016.05/gcc-aarch64)
set(CMAKE_C_COMPILER ${CMAKE_TOOLCHAIN_PATH}/bin/aarch64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER ${CMAKE_TOOLCHAIN_PATH}/bin/arm-linux-gnueabihf-g++)

编译动态链接库

通过生成 Makefile：

lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3$ mkdir build && cd build
lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3/build$ cmake -DCMAKE_TOOLCHAIN_FILE=xxx_linux_toolchain.cmake -DATCA_HAL_I2C=ON ../
-- The C compiler identification is GNU 4.9.3
-- Check for working C compiler: /home/lmx/work/xxx/lichee/out/gcc-linaro-5.3.1-2016.05/gcc-aarch64/bin/aarch64-linux-gnu-gcc
-- Check for working C compiler: /home/lmx/work/xxx/lichee/out/gcc-linaro-5.3.1-2016.05/gcc-aarch64/bin/aarch64-linux-gnu-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Looking for malloc
-- Looking for malloc - found
-- Looking for free
-- Looking for free - found
-- Configuring done
-- Generating done
-- Build files have been written to: /home/lmx/work/xxx/application/cryptoauthlib-3.3.3/build

编译动态库文件：

lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3/build$ make
Scanning dependencies of target cryptoauth
[  1%] Building C object lib/CMakeFiles/cryptoauth.dir/atca_basic.c.o
[  2%] Building C object lib/CMakeFiles/cryptoauth.dir/atca_cfgs.c.o
......
[ 95%] Building C object lib/CMakeFiles/cryptoauth.dir/hal/atca_hal.c.o
[ 97%] Building C object lib/CMakeFiles/cryptoauth.dir/hal/hal_linux.c.o
[ 98%] Building C object lib/CMakeFiles/cryptoauth.dir/hal/hal_linux_i2c_userspace.c.o
[100%] Linking C shared library libcryptoauth.so
[100%] Built target cryptoauth

得到两个关键文件：

lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3/build$ ls -l lib/*.h lib/*.so
-rw-r--r-- 1 lmx lmx   2923 11月  4 11:20 lib/atca_config.h
-rwxrwxr-x 1 lmx lmx 927371 11月  4 14:02 lib/libcryptoauth.so

编译可执行程序

指定动态链接库的位置：

--- cryptoauthlib-3.3.3\test\CMakeLists.txt
+++ cryptoauthlib-3.3.3\test\CMakeLists.txt
@@ -52,13 +52,13 @@
                                     ${CMAKE_CURRENT_SOURCE_DIR}/../lib
                                     ${CMAKE_CURRENT_SOURCE_DIR}/../third_party
                                     ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/mbedtls/include
                                     ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/wolfssl
                                     ${CMAKE_CURRENT_BINARY_DIR}/../lib)

-target_link_libraries(cryptoauth_test cryptoauth)
+target_link_libraries(cryptoauth_test ${CMAKE_CURRENT_BINARY_DIR}/../lib/libcryptoauth.so)

 if(UNIX)
 target_link_libraries(cryptoauth_test pthread)
 endif()

 if(ATCA_BUILD_SHARED_LIBS)

编译可执行程序：

lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3/build$ mkdir bin && cd bin
lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3/build/bin$ cmake -DCMAKE_TOOLCHAIN_FILE=../xxx_linux_toolchain.cmake ../../test/
-- The C compiler identification is GNU 4.9.3
-- Check for working C compiler: /home/lmx/work/xxx/lichee/out/gcc-linaro-5.3.1-2016.05/gcc-aarch64/bin/aarch64-linux-gnu-gcc
-- Check for working C compiler: /home/lmx/work/xxx/lichee/out/gcc-linaro-5.3.1-2016.05/gcc-aarch64/bin/aarch64-linux-gnu-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/lmx/work/xxx/application/cryptoauthlib-3.3.3/build/bin

lmx@lmx:~/work/xxx/application/cryptoauthlib-3.3.3/build/bin$ make
Scanning dependencies of target cryptoauth_test
[  1%] Building C object CMakeFiles/cryptoauth_test.dir/atca_crypto_sw_tests.c.o
[  2%] Building C object CMakeFiles/cryptoauth_test.dir/atca_test.c.o
......
[ 98%] Building C object CMakeFiles/cryptoauth_test.dir/home/lmx/work/xxx/application/cryptoauthlib-3.3.3/third_party/unity/unity_memory.c.o
[100%] Linking C executable cryptoauth_test
[100%] Built target cryptoauth_test

测试芯片功能：

执行测试程序(器件地址是 0x35，传给测试程序需要左移一位得到 0x6a)：

root@linux:~# ./cryptoauth_test info -d ecc608 -i i2c 1 -a 0x6a

revision:
00 00 60 03

root@linux:~# ./cryptoauth_test sernum -d ecc608 -i i2c 1 -a 0x6a

serial number:
01 23 1A 41 5D 5C E7 AF 01