AES example for SAM.

#include <asf.h>
#include <string.h>

Macros
#define	AES_EXAMPLE_REFBUF_SIZE 4
	[cipher_data] More...

sample data from NIST-800-38A appendix F
uint32_t	ref_plain_text [AES_EXAMPLE_REFBUF_SIZE]
	Reference plain data. More...

uint32_t	ref_cipher_text_ecb [AES_EXAMPLE_REFBUF_SIZE]
	Reference ECB cipher data. More...

const uint32_t	key128 [4]
	Cipher 128 bits key array. More...

static uint32_t	output_data [AES_EXAMPLE_REFBUF_SIZE]
	[cipher_data] More...

volatile bool	state = false

struct aes_config	g_aes_cfg
	AES configuration. More...

struct aes_module	aes_instance

struct usart_module	usart_instance

struct dma_resource	example_resource_tx
	[module_var] More...

struct dma_resource	example_resource_rx

DmacDescriptor example_descriptor_tx	SECTION_DMAC_DESCRIPTOR

static void	configure_usart (void)
	[module_var_dma] More...

static void	ecb_mode_test_dma (void)
	ECB mode encryption test with DMA. More...

static void	transfer_tx_rx_done (struct dma_resource *const resource)

static void	configure_dma_aes_wr (void)

static void	configure_dma_aes_rd (void)

int	main (void)
	[setup] More...

#define AES_EXAMPLE_REFBUF_SIZE 4

[cipher_data]

Referenced by configure_dma_aes_rd(), and configure_dma_aes_wr().

static void configure_dma_aes_rd ( void )

static

References AES_EXAMPLE_REFBUF_SIZE, dma_descriptor_config::beat_size, dma_descriptor_config::block_transfer_count, dma_descriptor_config::destination_address, dma_add_descriptor(), dma_allocate(), DMA_BEAT_SIZE_WORD, dma_descriptor_create(), dma_descriptor_get_config_defaults(), dma_get_config_defaults(), DMA_TRIGGER_ACTION_BLOCK, example_resource_rx, output_data, dma_resource_config::peripheral_trigger, dma_descriptor_config::source_address, dma_descriptor_config::src_increment_enable, and dma_resource_config::trigger_action.

Referenced by main().

static void configure_dma_aes_wr ( void )

static

References AES_EXAMPLE_REFBUF_SIZE, dma_descriptor_config::beat_size, dma_descriptor_config::block_transfer_count, dma_descriptor_config::destination_address, dma_add_descriptor(), dma_allocate(), DMA_BEAT_SIZE_WORD, dma_descriptor_create(), dma_descriptor_get_config_defaults(), dma_get_config_defaults(), DMA_TRIGGER_ACTION_BLOCK, dma_descriptor_config::dst_increment_enable, example_resource_tx, dma_resource_config::peripheral_trigger, ref_plain_text, dma_descriptor_config::source_address, and dma_resource_config::trigger_action.

Referenced by main().

static void configure_usart ( void )

static

[module_var_dma]

[setup]

References usart_config::baudrate, usart_config::mux_setting, usart_config::pinmux_pad0, usart_config::pinmux_pad1, usart_config::pinmux_pad2, usart_config::pinmux_pad3, usart_enable(), usart_get_config_defaults(), and usart_instance.

static void ecb_mode_test_dma ( void )

static

ECB mode encryption test with DMA.

[encryption_mode]

References AES_AUTO_START, AES_CFB_SIZE_128, aes_clear_new_message(), AES_ECB_MODE, AES_ENCRYPTION, AES_ENCRYPTION_COMPLETE, aes_get_status(), aes_instance, AES_KEY_SIZE_128, aes_set_config(), aes_set_new_message(), aes_write_key(), aes_config::cfb_size, dma_start_transfer_job(), aes_config::encrypt_mode, example_resource_rx, example_resource_tx, g_aes_cfg, key128, aes_config::key_size, aes_config::lod, aes_config::opmode, output_data, ref_cipher_text_ecb, aes_config::start_mode, and state.

Referenced by main().

int main ( void )

[setup]

The main function.

[setup_init]

[setup_dma]

[setup_config]

[setup_config] [setup_config_defaults]

[setup_config_defaults]

[module_enable]

[setup_init]

[encryption_decryption]

References aes_enable(), aes_get_config_defaults(), aes_init(), aes_instance, configure_dma_aes_rd(), configure_dma_aes_wr(), configure_usart(), DMA_CALLBACK_TRANSFER_DONE, dma_enable_callback(), dma_register_callback(), ecb_mode_test_dma(), example_resource_rx, example_resource_tx, g_aes_cfg, system_init(), and transfer_tx_rx_done().

static void transfer_tx_rx_done ( struct dma_resource *const resource )

static

References state.

Referenced by main().

struct aes_module aes_instance

struct dma_resource example_resource_rx

Referenced by configure_dma_aes_rd(), ecb_mode_test_dma(), main(), and run_ecb_mode_test_dma().

struct dma_resource example_resource_tx

[module_var]

[module_var_dma]

Referenced by configure_dma_aes_wr(), ecb_mode_test_dma(), main(), and run_ecb_mode_test_dma().

struct aes_config g_aes_cfg

AES configuration.

const uint32_t key128[4]

Initial value:

= {
    0x16157e2b,
    0xa6d2ae28,
    0x8815f7ab,
    0x3c4fcf09
}

Cipher 128 bits key array.

uint32_t output_data[AES_EXAMPLE_REFBUF_SIZE]

static

[cipher_data]

[module_var]

Referenced by configure_dma_aes_rd(), and ecb_mode_test_dma().

uint32_t ref_cipher_text_ecb[AES_EXAMPLE_REFBUF_SIZE]

Initial value:

= {
    0xb47bd73a,
    0x60367a0d,
    0xf3ca9ea8,
    0x97ef6624
}

Reference ECB cipher data.

uint32_t ref_plain_text[AES_EXAMPLE_REFBUF_SIZE]

Initial value:

= {
    0xe2bec16b,
    0x969f402e,
    0x117e3de9,
    0x2a179373
}

Reference plain data.

DmacDescriptor example_descriptor_rx SECTION_DMAC_DESCRIPTOR

volatile bool state = false

struct usart_module usart_instance

Microchip® Advanced Software Framework

Macros

sample data from NIST-800-38A appendix F