Crypto_file

libopencm3 STM32 Cryptographic controller More...

Macros
#define	CRYP_CR_ALGOMODE_MASK   ((1 << 19) | CRYP_CR_ALGOMODE)

Functions
void	crypto_wait_busy (void)
	Wait, if the Controller is busy. More...
void	crypto_set_key (enum crypto_keysize keysize, uint64_t key[])
	Set key value to the controller. More...
void	crypto_set_iv (uint64_t iv[])
	Set Initialization Vector. More...
void	crypto_set_datatype (enum crypto_datatype datatype)
	Set the order of the data to be crypted. More...
void	crypto_set_algorithm (enum crypto_mode mode)
	Set the algorithm for Encryption/decryption. More...
void	crypto_start (void)
	Enable the cryptographic controller and start processing. More...
void	crypto_stop (void)
	Disable the cryptographic controller and stop processing. More...
uint32_t	crypto_process_block (uint32_t *inp, uint32_t *outp, uint32_t length)
	Start of encryption or decryption on data buffers. More...

Detailed Description

libopencm3 STM32 Cryptographic controller

Version

1.0.0

Date

17 Jun 2013

This library supports the cryptographic coprocessor system for the STM32 series of ARM Cortex Microcontrollers

LGPL License Terms libopencm3 License

Macro Definition Documentation

CRYP_CR_ALGOMODE_MASK

#define CRYP_CR_ALGOMODE_MASK   ((1 << 19) | CRYP_CR_ALGOMODE)

Definition at line 37 of file crypto_common_f24.c.

Function Documentation

crypto_process_block()

uint32_t crypto_process_block	(	uint32_t *	inp,
		uint32_t *	outp,
		uint32_t	length
	)

Start of encryption or decryption on data buffers.

This blocking method transfers input buffer of specified length to the cryptographic coprocessor, and instructs him to begin of ciphering or deciphering. It waits for data to be ready, and then fills the processed data to output buffer.

Parameters

[in]	inp	uint32_t* Input array to crypt/decrypt.
[in]	outp	uint32_t* Output array with crypted/encrypted data.
[in]	length	uint32_t Length of the arrays

Returns

uint32_t Number of written words

Definition at line 152 of file crypto_common_f24.c.

References CRYP_DIN, CRYP_DOUT, CRYP_SR, CRYP_SR_IFNF, CRYP_SR_OFNE, and crypto_wait_busy().

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crypto_set_algorithm()

void crypto_set_algorithm

(

enum crypto_mode

mode

)

Set the algorithm for Encryption/decryption.

Parameters

[in]

mode

enum crypto_mode Mode of execution

Definition at line 100 of file crypto_common_f24.c.

References CRYP_CR, CRYP_CR_ALGOMODE_AES_PREP, CRYP_CR_FFLUSH, crypto_start(), crypto_wait_busy(), DECRYPT_AES_CBC, and DECRYPT_AES_ECB.

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crypto_set_datatype()

void crypto_set_datatype

(

enum crypto_datatype

datatype

)

Set the order of the data to be crypted.

Parameters

[in]

datatype

enum crypto_datatype Specified datatype of the key.

Definition at line 89 of file crypto_common_f24.c.

References CRYP_CR, and CRYP_CR_DATATYPE_SHIFT.

crypto_set_iv()

void crypto_set_iv

(

uint64_t

iv[]

)

Set Initialization Vector.

Parameters

[in]

iv

uint64_t[] Initialization vector (array of 4 items)

Note

Cryptographic controller must be in disabled state

Definition at line 73 of file crypto_common_f24.c.

References CRYP_IVR, and crypto_wait_busy().

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crypto_set_key()

void crypto_set_key	(	enum crypto_keysize	keysize,
		uint64_t	key[]
	)

Set key value to the controller.

Parameters

[in]	keysize	enum crypto_keysize Specified size of the key.
[in]	key	uint64_t[] Key value (array of 4 items)

Definition at line 52 of file crypto_common_f24.c.

References CRYP_CR, CRYP_CR_KEYSIZE_SHIFT, CRYP_KR, and crypto_wait_busy().

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crypto_start()

void crypto_start

(

void

)

Enable the cryptographic controller and start processing.

Definition at line 124 of file crypto_common_f24.c.

References CRYP_CR, and CRYP_CR_CRYPEN.

Referenced by crypto_set_algorithm().

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crypto_stop()

void crypto_stop

(

void

)

Disable the cryptographic controller and stop processing.

Definition at line 133 of file crypto_common_f24.c.

References CRYP_CR.

crypto_wait_busy()

void crypto_wait_busy

(

void

)

Wait, if the Controller is busy.

Definition at line 42 of file crypto_common_f24.c.

References CRYP_SR, and CRYP_SR_BUSY.

Referenced by crypto_process_block(), crypto_set_algorithm(), crypto_set_iv(), and crypto_set_key().

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