RadioLibSoftwareAES128 Class Reference

Class to perform AES encryption and decryption in software only. Contains implementation of pure virtual methods from RadioLibAES128. More...

#include <Cryptography.h>

Inheritance diagram for RadioLibSoftwareAES128:

Public Member Functions
	RadioLibSoftwareAES128 ()
	Default constructor.
void	init (uint8_t *key) override
	Initialize the AES.
size_t	encryptECB (const uint8_t *in, size_t len, uint8_t *out) override
	Perform ECB-type AES encryption.
size_t	decryptECB (const uint8_t *in, size_t len, uint8_t *out) override
	Perform ECB-type AES decryption.
Public Member Functions inherited from RadioLibAES128
	RadioLibAES128 ()
	Default constructor.
void	generateCMAC (const uint8_t *in, size_t len, uint8_t *cmac)
	Calculate message authentication code according to RFC4493.
void	initCMAC (RadioLibCmacState *st)
	Initialize the CMAC state. This must be called before any updateCMAC calls.
void	updateCMAC (RadioLibCmacState *st, const uint8_t *data, size_t len)
	Update the CMAC state with a chunk of data. This can be called multiple times to process the data in chunks.
void	finishCMAC (RadioLibCmacState *st, uint8_t *out)
	Finalize the CMAC calculation and save the result. This must be called after all updateCMAC calls are done.
bool	verifyCMAC (const uint8_t *in, size_t len, const uint8_t *cmac)
	Verify the received CMAC. This just calculates the CMAC again and compares the results.

Detailed Description

Class to perform AES encryption and decryption in software only. Contains implementation of pure virtual methods from RadioLibAES128.

Most of the implementation here is adapted from https://github.com/kokke/tiny-AES-c

Member Function Documentation

decryptECB()

size_t RadioLibSoftwareAES128::decryptECB ( const uint8_t *  in, size_t  len, uint8_t *  out  )

overridevirtual

Perform ECB-type AES decryption.

Parameters

in	Input ciphertext data.
len	Length of the input data.
out	Buffer to save the output plaintext into. It is up to the caller to ensure the buffer is sufficiently large to save the data!

Returns

The number of bytes saved into the output buffer.

Implements RadioLibAES128.

encryptECB()

size_t RadioLibSoftwareAES128::encryptECB ( const uint8_t *  in, size_t  len, uint8_t *  out  )

overridevirtual

Perform ECB-type AES encryption.

Parameters

in	Input plaintext data (unpadded).
len	Length of the input data.
out	Buffer to save the output ciphertext into. It is up to the caller to ensure the buffer is sufficiently large to save the data!

Returns

The number of bytes saved into the output buffer.

Implements RadioLibAES128.

init()

void RadioLibSoftwareAES128::init ( uint8_t *  key )

overridevirtual

Initialize the AES.

Parameters

key	AES key to use.

Implements RadioLibAES128.

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The documentation for this class was generated from the following files:

• src/utils/Cryptography.h
• src/utils/Cryptography.cpp