cc2538 SHA-256

Driver for the cc2538 SHA-256 mode of the security core. More...

Files
file	sha256.c
	Implementation of the cc2538 SHA-256 driver.
file	sha256.h
	Header file for the cc2538 SHA-256 driver.

Functions
static uint8_t	new_hash (sha256_state_t *state, const void *data, void *hash)
	Starts a new hash session in hardware. More...
static uint8_t	resume_hash (sha256_state_t *state, const void *data, void *hash)
	Resumes an already started hash session in hardware. More...

SHA-256 functions
uint8_t	sha256_init (sha256_state_t *state)
	Initializes the hash state. More...
uint8_t	sha256_process (sha256_state_t *state, const void *data, uint32_t len)
	Processes a block of memory through the hash. More...
uint8_t	sha256_done (sha256_state_t *state, void *hash)
	Terminates hash session to get the digest. More...

Detailed Description

Driver for the cc2538 SHA-256 mode of the security core.

Function Documentation

new_hash()

static uint8_t new_hash ( sha256_state_t *  state, const void *  data, void *  hash  )

static

Starts a new hash session in hardware.

Parameters

state	Hash state
data	Pointer to input message
hash	Destination of the hash (32 bytes)

Returns

CRYPTO_SUCCESS if successful, or CRYPTO/SHA256 error code

Definition at line 63 of file sha256.c.

resume_hash()

static uint8_t resume_hash ( sha256_state_t *  state, const void *  data, void *  hash  )

static

Resumes an already started hash session in hardware.

Parameters

state	Hash state
data	Pointer to the input message
hash	Pointer to the destination of the hash (32 bytes)

Returns

CRYPTO_SUCCESS if successful, or CRYPTO/SHA256 error code

Definition at line 140 of file sha256.c.

sha256_done()

uint8_t sha256_done	(	sha256_state_t *	state,
		void *	hash
	)

Terminates hash session to get the digest.

Parameters

state	Pointer to hash state
hash	Pointer to hash

Returns

CRYPTO_SUCCESS if successful, or CRYPTO/SHA256 error code

Note

This function must be called only after sha256_process().

Definition at line 320 of file sha256.c.

sha256_init()

uint8_t sha256_init

(

sha256_state_t *

state

)

Initializes the hash state.

Parameters

state

Pointer to hash state to initialize

Returns

CRYPTO_SUCCESS if successful, or CRYPTO/SHA256 error code

Definition at line 229 of file sha256.c.

sha256_process()

uint8_t sha256_process	(	sha256_state_t *	state,
		const void *	data,
		uint32_t	len
	)

Processes a block of memory through the hash.

Parameters

state	Pointer to hash state
data	Pointer to the data to hash
len	Length of the data to hash in bytes (octets)

Returns

CRYPTO_SUCCESS if successful, or CRYPTO/SHA256 error code

Note

This function must be called only after sha256_init().

Definition at line 243 of file sha256.c.