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FAQ

Why is the M480 AES sample output different from the network tool? http://testprotect.com/appendix/AEScalc  Issue Date：2018-11-27

In the case of a network tool:

Key: 000102030405060708090a0b0c0d0e0f

Plaintext: 00112233445566778899aabbccddeeff

Ciphertext: 69c4e0d86a7b0430d8cdb78070b4c55a

 

The key input corresponding to the AES register:

CRYPTO_AESn_KEY0 = 0x00010203

CRYPTO_AESn_KEY1 = 0x04050607

CRYPTO_AESn_KEY2 = 0x08090a0b

CRYPTO_AESn_KEY3 = 0x0c0d0e0f

 

Input data:

CRYPTO_AES_DATIN = { 0x00112233, 0x44556677, 0x8899aabb, 0xccddeeff }

 

The obtained output data:

CRYPTO_AES_DATOUT = { 0x69c4e0d8, 0x6a7b0430, 0x d8cdb780, 0x70b4c55a }

 

It should be noted that the data processing of AES is handled by the variable type of WORD. There are different LSBs and MSBs from the variable type of BYTE.

Products: Microcontrollers ,Arm Cortex-M4 MCUs ,M481 Base Series ,M482 USB FS OTG Series ,M483 CAN Series ,M484 USB HS OTG Series ,M485 Crypto Series ,M487 Ethernet Series
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