Ltc_driver_des_with_dpa

Overview

Functions
status_t	LTC_DES_SetKeyDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t key1[LTC_DPA_DES_KEY_SIZE], const uint8_t key2[LTC_DPA_DES_KEY_SIZE], const uint8_t key3[LTC_DPA_DES_KEY_SIZE])
	Set key for LTC DPA DES operations. More...
status_t	LTC_DES_EncryptEcbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size)
	Encrypts DES using ECB block mode. More...
status_t	LTC_DES_DecryptEcbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size)
	Decrypts DES using ECB block mode. More...
status_t	LTC_DES_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_DES_IV_SIZE])
	Encrypts DES using CBC block mode. More...
status_t	LTC_DES_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_DES_IV_SIZE])
	Decrypts DES using CBC block mode. More...
status_t	LTC_DES_EncryptCfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Encrypts DES using CFB block mode. More...
status_t	LTC_DES_DecryptCfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Decrypts DES using CFB block mode. More...
status_t	LTC_DES_EncryptOfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Encrypts DES using OFB block mode. More...
status_t	LTC_DES_DecryptOfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Decrypts DES using OFB block mode. More...
status_t	LTC_DES2_EncryptEcbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size)
	Encrypts triple DES using ECB block mode with two keys. More...
status_t	LTC_DES2_DecryptEcbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size)
	Decrypts triple DES using ECB block mode with two keys. More...
status_t	LTC_DES2_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_DES_IV_SIZE])
	Encrypts triple DES using CBC block mode with two keys. More...
status_t	LTC_DES2_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_DES_IV_SIZE])
	Decrypts triple DES using CBC block mode with two keys. More...
status_t	LTC_DES2_EncryptCfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Encrypts triple DES using CFB block mode with two keys. More...
status_t	LTC_DES2_DecryptCfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Decrypts triple DES using CFB block mode with two keys. More...
status_t	LTC_DES2_EncryptOfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Encrypts triple DES using OFB block mode with two keys. More...
status_t	LTC_DES2_DecryptOfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Decrypts triple DES using OFB block mode with two keys. More...
status_t	LTC_DES3_EncryptEcbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size)
	Encrypts triple DES using ECB block mode with three keys. More...
status_t	LTC_DES3_DecryptEcbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size)
	Decrypts triple DES using ECB block mode with three keys. More...
status_t	LTC_DES3_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_DES_IV_SIZE])
	Encrypts triple DES using CBC block mode with three keys. More...
status_t	LTC_DES3_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_DES_IV_SIZE])
	Decrypts triple DES using CBC block mode with three keys. More...
status_t	LTC_DES3_EncryptCfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Encrypts triple DES using CFB block mode with three keys. More...
status_t	LTC_DES3_DecryptCfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Decrypts triple DES using CFB block mode with three keys. More...
status_t	LTC_DES3_EncryptOfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *plaintext, uint8_t *ciphertext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Encrypts triple DES using OFB block mode with three keys. More...
status_t	LTC_DES3_DecryptOfbDPA (LTC_Type *base, ltc_dpa_handle_t *handle, const uint8_t *ciphertext, uint8_t *plaintext, size_t size, const uint8_t iv[LTC_DPA_DES_IV_SIZE])
	Decrypts triple DES using OFB block mode with three keys. More...

Function Documentation

status_t LTC_DES_SetKeyDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t	key1[LTC_DPA_DES_KEY_SIZE],
		const uint8_t	key2[LTC_DPA_DES_KEY_SIZE],
		const uint8_t	key3[LTC_DPA_DES_KEY_SIZE]
	)

This function sets key for usage with LTC DPA DES functions.

Parameters

	base	LTC module base address
[in,out]	handle	Pointer to ltc_dpa_handle_t structure
	key1	The 1st 8-byte key.
	key2	The 2nd 8-byte key. Can be NULL if running simple DES.
	key3	The 3rd 8-byte key. Can be NULL if running 3DES with 2 keys (16-byte key).

Returns

Status.

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

Encrypts DES using ECB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.

Returns

Status from encrypt/decrypt operation

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

Decrypts DES 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 ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES_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_DES_IV_SIZE]
	)

Encrypts DES using CBC block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Ouput ciphertext
	size	Size of input and output data in bytes
	iv	Input initial vector to combine with the first plaintext block. The iv does not need to be secret, but it must be unpredictable.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES_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_DES_IV_SIZE]
	)

Decrypts DES using CBC block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input data in bytes
	iv	Input initial vector to combine with the first plaintext block. The iv does not need to be secret, but it must be unpredictable.

Returns

Status from encrypt/decrypt operation

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

Encrypts DES using CFB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
	size	Size of input data in bytes
	iv	Input initial block.
[out]	ciphertext	Output ciphertext

Returns

Status from encrypt/decrypt operation

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

Decrypts DES using CFB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes
	iv	Input initial block.

Returns

Status from encrypt/decrypt operation

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

Encrypts DES using OFB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes
	iv	Input unique input vector. The OFB mode requires that the IV be unique for each execution of the mode under the given key.

Returns

Status from encrypt/decrypt operation

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

Decrypts DES using OFB block mode.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.
	iv	Input unique input vector. The OFB mode requires that the IV be unique for each execution of the mode under the given key.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_EncryptEcbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size
	)

Encrypts triple DES using ECB block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_DecryptEcbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size
	)

Decrypts triple DES using ECB block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_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_DES_IV_SIZE]
	)

Encrypts triple DES using CBC block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes
	iv	Input initial vector to combine with the first plaintext block. The iv does not need to be secret, but it must be unpredictable.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_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_DES_IV_SIZE]
	)

Decrypts triple DES using CBC block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes
	iv	Input initial vector to combine with the first plaintext block. The iv does not need to be secret, but it must be unpredictable.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_EncryptCfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Encrypts triple DES using CFB block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes
	iv	Input initial block.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_DecryptCfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Decrypts triple DES using CFB block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes
	iv	Input initial block.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_EncryptOfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Encrypts triple DES using OFB block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes
	iv	Input unique input vector. The OFB mode requires that the IV be unique for each execution of the mode under the given key.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES2_DecryptOfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Decrypts triple DES using OFB block mode with two keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes
	iv	Input unique input vector. The OFB mode requires that the IV be unique for each execution of the mode under the given key.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_EncryptEcbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size
	)

Encrypts triple DES using ECB block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_DecryptEcbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size
	)

Decrypts triple DES using ECB block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes. Must be multiple of 8 bytes.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_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_DES_IV_SIZE]
	)

Encrypts triple DES using CBC block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input data in bytes
	iv	Input initial vector to combine with the first plaintext block. The iv does not need to be secret, but it must be unpredictable.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_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_DES_IV_SIZE]
	)

Decrypts triple DES using CBC block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes
	iv	Input initial vector to combine with the first plaintext block. The iv does not need to be secret, but it must be unpredictable.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_EncryptCfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Encrypts triple DES using CFB block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and ouput data in bytes
	iv	Input initial block.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_DecryptCfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Decrypts triple DES using CFB block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input data in bytes
	iv	Input initial block.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_EncryptOfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	plaintext,
		uint8_t *	ciphertext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Encrypts triple DES using OFB block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	plaintext	Input plaintext to encrypt
[out]	ciphertext	Output ciphertext
	size	Size of input and output data in bytes
	iv	Input unique input vector. The OFB mode requires that the IV be unique for each execution of the mode under the given key.

Returns

Status from encrypt/decrypt operation

status_t LTC_DES3_DecryptOfbDPA	(	LTC_Type *	base,
		ltc_dpa_handle_t *	handle,
		const uint8_t *	ciphertext,
		uint8_t *	plaintext,
		size_t	size,
		const uint8_t	iv[LTC_DPA_DES_IV_SIZE]
	)

Decrypts triple DES using OFB block mode with three keys.

Parameters

	base	LTC peripheral base address
	handle	pointer to ltc_dpa_handle_t structure which stores the transaction state.
	ciphertext	Input ciphertext to decrypt
[out]	plaintext	Output plaintext
	size	Size of input and output data in bytes
	iv	Input unique input vector. The OFB mode requires that the IV be unique for each execution of the mode under the given key.

Returns

Status from encrypt/decrypt operation