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How to handle padding with STM32 Cryptographic Library

Question asked by Brem_N_hr.Folmer on Dec 7, 2016
Latest reply on Dec 9, 2016 by Clive One

I am writing an application in C# that AES-encrypts some data that is then decrypted inside an STM32 using STM32 Cryptographic Library. My C#-class (
https://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndael(v=vs.110).aspx
) can encrypt using different types of padding (ANSIX923, ISO10126, PKCS7 and with zeros). I have not found a way to specify the padding for the function in the STM32 Cryptographic Library.

 

Right now, my decryption fails because of padding-issues.

 

I use AES 128-bit, CBC-mode.

 

What padding is used in STM32 Cryptographic Library?

How to I change the padding mode?

 

Thanks

 

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