Cryptoaesdecrypt; Table 10-18: Cryptoaesdecrypt Command; Table 10-19: Cryptoaesdecrypt Response - Semtech LR1121 User Manual

10.3.9 CryptoAesDecrypt

Command CryptoAesDecrypt(...) decrypts the provided data using the specified Key and returns it, and can only be
used on keys indexes 26-27, when the Crypto Engine is used as a stand-alone hardware accelerator for non-LoRaWAN
security tasks.

Table 10-18: CryptoAesDecrypt Command

Byte
Data from Host
Data to Host

Table 10-19: CryptoAesDecrypt Response

Byte
Data from Host
Data to Host
• KeyID: Specified Key ID, as defined in
Valid values are from 0 to 27.
• Data1, Data2 to DataN: Provided data, considered as byte buffers.
• CEStatus: Defined in section
• DecryptedData1, DecryptedData2 to DecryptedDataN: Decrypted data, considered as byte buffers.
LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
0 1
0x05 0x09
Stat1 Stat2
0 1
0x00 0x00
Stat1 CEStatus
Table 10-1: Cryptographic Keys Usage and
CEStatus on page 103.
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2 3
KeyID (7:0) Data1
IrqStatus IrqStatus
(31:24) (23:16)
2
0x00
Decrypted
Data1
Derivation.
... N+2
... DataN
... 0x00
... N+1
... 0x00
Decrypted
...
DataN
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