csec CMAC check

[lyz]

I caculate MAC in CSEc mocule by CSEC_DRV_GenerateMACAddrMode function as follows, 

lyz_0-1661139420064.png

but it compare with the value that caculated by mbedtls Algorithm library as follows,

lyz_1-1661139760113.png

the result is diffent, check failed.

we can caculate the mac by other methods? and, we need add 128 bits datas? like this, as follow 

lyz_2-1661140354520.png

and checkking it caculated by CSEC_DRV_GenerateMACAddrMode.

[JRoberto]

Hello @lyz 

Could you provide me the information below from your development environment please?
IDE / Version:
Specific Target:
SDK / RTD Version:

Best Regards!

[lyz]

the problem had been solved, the result is same as.

thanks！

[Keane]

楼主你好，

最近也在使用CSEc模块，在生成和校验MAC的时候发现有字节长度限制，数据长点就会生成和校验失败，完全达不到帖子里的16K大小。能请教下这个长度限制的问题怎么解决的吗？

盼复。

[lyz]

使用这两个接口计算，

lyz_0-1667981543871.png

一个是4字节4字节取的数据，一个是一字节一字节取的数据。保证字节序一致，两个算出来的MAC值是一样的

[Keane]

问题已经在早些时候解决了，感谢楼主的回复！