How can I encrypt and decrypt data in CBC mode with nRF51822 ？

RE: How can I encrypt and decrypt data in CBC mode with nRF51822 ？

LIANGTAO — Tue, 30 Jan 2018 06:19:33 GMT

thank you，the problem has been solved。

RE: How can I encrypt and decrypt data in CBC mode with nRF51822 ？

LIANGTAO — Tue, 30 Jan 2018 06:18:18 GMT

Thank you very much！

RE: How can I encrypt and decrypt data in CBC mode with nRF51822 ？

Jakub Rzeszutko — Mon, 29 Jan 2018 13:34:47 GMT

Hi,

In SDK 12.3 under location: nRF5_SDK_12.3.0_d7731ad\external\tiny-AES128 there are available software implementation for AES ECB and AES CBC.

If you are using older SDK you can simply download SDK12.3 and integrate tiny-AES128 library from it.

What I see usage is pretty easy, you are only interested in these 2 functions:

void AES128_CBC_encrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, const uint8_t* key, const uint8_t* iv);
void AES128_CBC_decrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, const uint8_t* key, const uint8_t* iv);

RE: How can I encrypt and decrypt data in CBC mode with nRF51822 ？

ketil — Mon, 29 Jan 2018 11:43:44 GMT

Hi,

We do not currently have any examples for AES-CBC.

We will have some more examples in the upcoming nRF5 SDK v15 but this will only support nRF52x devices out-of-the-box.

You should be able to study these examples and with a little effort modify them to work in your project.

Ketil