Crypto

Hardware hash and cipher acceleration used by Cryptography. More...

Modules
	SiFli SF32LB AES and hash accelerator
	AES and hash units of the SF32LB52 crypto engine, behind the pbl_crypto_hw_*() functions.

Functions
size_t	pbl_crypto_hw_sha256_blocks (uint32_t state[8], const void *data, size_t nblocks)
	Accelerated SHA-256 compression.
size_t	pbl_crypto_hw_aes_ecb_encrypt (const uint8_t *key, size_t key_len, uint8_t *out, const uint8_t *in, size_t nblocks)
	Accelerated AES encryption in ECB mode.
size_t	pbl_crypto_hw_aes_ecb_decrypt (const uint8_t *key, size_t key_len, uint8_t *out, const uint8_t *in, size_t nblocks)
	Accelerated AES decryption in ECB mode.

Detailed Description

Hardware hash and cipher acceleration used by Cryptography.

SHA-256 is provided by drivers that select CRYPTO_SHA256_HW_ACCEL, AES by drivers that select CRYPTO_AES_HW_ACCEL.

Each function processes a prefix of the blocks and returns how many. A driver processes none when the hardware cannot take the request, before it is ready or for any other reason; the crypto subsystem processes whatever is left in software.

Function Documentation

pbl_crypto_hw_aes_ecb_decrypt()

size_t pbl_crypto_hw_aes_ecb_decrypt	(	const uint8_t *	key,
		size_t	key_len,
		uint8_t *	out,
		const uint8_t *	in,
		size_t	nblocks
	)

Accelerated AES decryption in ECB mode.

Parameters

	key	Key.
	key_len	Length of key in bytes: 16, 24 or 32.
[out]	out	Plaintext, which may be in.
	in	Ciphertext.
	nblocks	Number of 16-byte blocks in in.

Returns

Number of blocks processed.

pbl_crypto_hw_aes_ecb_encrypt()

size_t pbl_crypto_hw_aes_ecb_encrypt	(	const uint8_t *	key,
		size_t	key_len,
		uint8_t *	out,
		const uint8_t *	in,
		size_t	nblocks
	)

Accelerated AES encryption in ECB mode.

Parameters

	key	Key.
	key_len	Length of key in bytes: 16, 24 or 32.
[out]	out	Ciphertext, which may be in.
	in	Plaintext.
	nblocks	Number of 16-byte blocks in in.

Returns

Number of blocks processed.

pbl_crypto_hw_sha256_blocks()

size_t pbl_crypto_hw_sha256_blocks	(	uint32_t	state[8],
		const void *	data,
		size_t	nblocks
	)

Accelerated SHA-256 compression.

Compresses blocks into a running chaining value, without padding.

Parameters

[in,out]	state	Chaining value, H0 to H7.
	data	Blocks to hash.
	nblocks	Number of 64-byte blocks in data.

Returns

Number of blocks processed; state reflects exactly those.