Overview

Functions
status_t	LTC_AES_EncryptEcbDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t plaintext, uint8_t ciphertext, size_t size)
	Encrypts AES using the ECB block mode. More...

status_t	LTC_AES_DecryptEcbDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t ciphertext, uint8_t plaintext, size_t size)
	Decrypts AES using ECB block mode. More...

status_t	LTC_AES_EncryptCbcDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t plaintext, uint8_t ciphertext, size_t size, const uint8_t iv[LTC_DPA_AES_IV_SIZE])
	Encrypts AES using CBC block mode. More...

status_t	LTC_AES_DecryptCbcDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t ciphertext, uint8_t plaintext, size_t size, const uint8_t iv[LTC_DPA_AES_IV_SIZE])
	Decrypts AES using CBC block mode. More...

status_t	LTC_AES_CryptCtrDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t input, uint8_t output, size_t size, uint8_t counter[LTC_DPA_AES_BLOCK_SIZE], uint8_t counterlast[LTC_DPA_AES_BLOCK_SIZE], size_t *szLeft)
	Encrypts or decrypts AES using CTR block mode. More...

status_t	LTC_AES_EncryptTagCcmDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t plaintext, uint8_t ciphertext, size_t size, const uint8_t iv, size_t ivSize, const uint8_t aad, size_t aadSize, uint8_t *tag, size_t tagSize)
	Encrypts AES and tags using CCM block mode. More...

status_t	LTC_AES_DecryptTagCcmDPA (LTC_Type base, ltc_dpa_handle_t handle, const uint8_t ciphertext, uint8_t plaintext, size_t size, const uint8_t iv, size_t ivSize, const uint8_t aad, size_t aadSize, const uint8_t *tag, size_t tagSize)
	Decrypts AES and authenticates using CCM block mode. More...

Function Documentation

status_t LTC_AES_EncryptEcbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size
	)

Encrypts AES using the ECB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plain text to encrypt
[out]	ciphertext	Output cipher text
	size	Size of input and output data in bytes. Must be multiple of 16 bytes.

Returns: Status from encrypt operation

status_t LTC_AES_DecryptEcbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size
	)

Decrypts AES using ECB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input cipher text to decrypt
[out]	plaintext	Output plain text
	size	Size of input and output data in bytes. Must be multiple of 16 bytes.

Returns: Status from decrypt operation

status_t LTC_AES_EncryptCbcDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_AES_IV_SIZE]
	)

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plain text to encrypt
[out]	ciphertext	Output cipher text
	size	Size of input and output data in bytes. Must be multiple of 16 bytes.
	iv	Input initial vector to combine with the first input block.

Returns: Status from encrypt operation

status_t LTC_AES_DecryptCbcDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_AES_IV_SIZE]
	)

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input cipher text to decrypt
[out]	plaintext	Output plain text
	size	Size of input and output data in bytes. Must be multiple of 16 bytes.
	iv	Input initial vector to combine with the first input block.
	key	Input key to use for decryption

Returns: Status from decrypt operation

status_t LTC_AES_CryptCtrDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	input,
		uint8_t *	output,
		size_t	size,
		uint8_t	counter[LTC_DPA_AES_BLOCK_SIZE],
		uint8_t	counterlast[LTC_DPA_AES_BLOCK_SIZE],
		size_t *	szLeft
	)

Encrypts or decrypts AES using CTR block mode. AES CTR mode uses only forward AES cipher and same algorithm for encryption and decryption. The only difference between encryption and decryption is that, for encryption, the input argument is plain text and the output argument is cipher text. For decryption, the input argument is cipher text and the output argument is plain text.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	input	Input data for CTR block mode
[out]	output	Output data for CTR block mode
	size	Size of input and output data in bytes
[in,out]	counter	Input counter (updates on return)
[out]	counterlast	Output cipher of last counter, for chained CTR calls. NULL can be passed if chained calls are not used.
[out]	szLeft	Output number of bytes in left unused in counterlast block. NULL can be passed if chained calls are not used.

Returns: Status from encrypt operation

status_t LTC_AES_EncryptTagCcmDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size,
		const uint8_t *	iv,
		size_t	ivSize,
		const uint8_t *	aad,
		size_t	aadSize,
		uint8_t *	tag,
		size_t	tagSize
	)

Encrypts AES and optionally tags using CCM block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plain text to encrypt
[out]	ciphertext	Output cipher text.
	size	Size of input and output data in bytes. Zero means authentication only.
	iv	Nonce
	ivSize	Length of the Nonce in bytes. Must be 7, 8, 9, 10, 11, 12, or 13.
	aad	Input additional authentication data. Can be NULL if aadSize is zero.
	aadSize	Input size in bytes of AAD. Zero means data mode only (authentication skipped).
[out]	tag	Generated output tag. Set to NULL to skip tag processing.
	tagSize	Input size of the tag to generate, in bytes. Must be 4, 6, 8, 10, 12, 14, or 16.

Returns: Status from encrypt operation

status_t LTC_AES_DecryptTagCcmDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size,
		const uint8_t *	iv,
		size_t	ivSize,
		const uint8_t *	aad,
		size_t	aadSize,
		const uint8_t *	tag,
		size_t	tagSize
	)

Decrypts AES and optionally authenticates using CCM block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input cipher text to decrypt
[out]	plaintext	Output plain text.
	size	Size of input and output data in bytes. Zero means authentication only.
	iv	Nonce
	ivSize	Length of the Nonce in bytes. Must be 7, 8, 9, 10, 11, 12, or 13.
	aad	Input additional authentication data. Can be NULL if aadSize is zero.
	aadSize	Input size in bytes of AAD. Zero means data mode only (authentication skipped).
	tag	Received tag. Set to NULL to skip tag processing.
	tagSize	Input size of the received tag to compare with the computed tag, in bytes. Must be 4, 6, 8, 10, 12, 14, or 16.

Returns: Status from decrypt operation

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