Algorithms - IDEA

Functions
WOLFSSL_API int	wc_IdeaSetKey (Idea *idea, const byte *key, word16 keySz, const byte *iv, int dir)
	Generate the 52, 16-bit key sub-blocks from the 128 key.
WOLFSSL_API int	wc_IdeaSetIV (Idea *idea, const byte *iv)
	Sets the IV in an Idea key structure.
WOLFSSL_API int	wc_IdeaCipher (Idea *idea, byte *out, const byte *in)
	Encryption or decryption for a block (64 bits).
WOLFSSL_API int	wc_IdeaCbcEncrypt (Idea *idea, byte *out, const byte *in, word32 len)
	Encrypt data using IDEA CBC mode.
WOLFSSL_API int	wc_IdeaCbcDecrypt (Idea *idea, byte *out, const byte *in, word32 len)
	Decrypt data using IDEA CBC mode.

Detailed Description

Function Documentation

wc_IdeaCbcDecrypt()

WOLFSSL_API int wc_IdeaCbcDecrypt	(	Idea *	idea,
		byte *	out,
		const byte *	in,
		word32	len )

Decrypt data using IDEA CBC mode.

Returns

0 Success

BAD_FUNC_ARG Returns if any arguments are null.

Parameters

idea	Pointer to Idea key structure.
out	Pointer to destination for encryption.
in	Pointer to input for encryption.
len	length of input.

Example

Idea idea;
// Initialize idea structure for decryption
const char *message = "International Data Encryption Algorithm";
byte msg_enc[40], msg_dec[40];
 
memset(msg_dec, 0, sizeof(msg_dec));
ret = wc_IdeaCbcDecrypt(&idea, msg_dec, msg_enc,
                            (word32)strlen(message)+1);
if(ret != 0)
{
    // Some error occurred
}

See also

wc_IdeaCbcEncrypt

wc_IdeaCipher

wc_IdeaSetKey

wc_IdeaCbcEncrypt()

WOLFSSL_API int wc_IdeaCbcEncrypt	(	Idea *	idea,
		byte *	out,
		const byte *	in,
		word32	len )

Encrypt data using IDEA CBC mode.

Returns

0 Success

BAD_FUNC_ARG Returns if any arguments are null.

Parameters

idea	Pointer to Idea key structure.
out	Pointer to destination for encryption.
in	Pointer to input for encryption.
len	length of input.

Example

Idea idea;
// Initialize idea structure for encryption
const char *message = "International Data Encryption Algorithm";
byte msg_enc[40], msg_dec[40];
 
memset(msg_enc, 0, sizeof(msg_enc));
ret = wc_IdeaCbcEncrypt(&idea, msg_enc, (byte *)message,
                            (word32)strlen(message)+1);
if(ret != 0)
{
    // Some error occurred
}

See also

wc_IdeaCbcDecrypt

wc_IdeaCipher

wc_IdeaSetKey

wc_IdeaCipher()

WOLFSSL_API int wc_IdeaCipher	(	Idea *	idea,
		byte *	out,
		const byte *	in )

Encryption or decryption for a block (64 bits).

Returns

0 upon success.

<0 an error occurred

Parameters

idea	Pointer to idea key structure.
out	Pointer to destination.
in	Pointer to input data to encrypt or decrypt.

Example

byte v_key[IDEA_KEY_SIZE] = { }; // Some Key
byte data[IDEA_BLOCK_SIZE] = { }; // Some encrypted data
Idea idea;
wc_IdeaSetKey(&idea, v_key, IDEA_KEY_SIZE, NULL, IDEA_DECRYPTION);
int ret = wc_IdeaCipher(&idea, data, data);
 
if (ret != 0)
{
    // There was an error
}

See also

wc_IdeaSetKey

wc_IdeaSetIV

wc_IdeaCbcEncrypt

wc_IdeaCbcDecrypt

wc_IdeaSetIV()

WOLFSSL_API int wc_IdeaSetIV	(	Idea *	idea,
		const byte *	iv )

Sets the IV in an Idea key structure.

Returns

0 Success

BAD_FUNC_ARG Returns if idea is null.

Parameters

idea	Pointer to idea key structure.
iv	The IV value to set, can be null.

Example

Idea idea;
// Initialize idea
 
byte iv[] = { }; // Some IV
int ret = wc_IdeaSetIV(&idea, iv);
if(ret != 0)
{
    // Some error occurred
}

See also

wc_IdeaSetKey

wc_IdeaSetKey()

WOLFSSL_API int wc_IdeaSetKey	(	Idea *	idea,
		const byte *	key,
		word16	keySz,
		const byte *	iv,
		int	dir )

Generate the 52, 16-bit key sub-blocks from the 128 key.

Returns

0 Success

BAD_FUNC_ARG Returns if idea or key is null, keySz is not equal to IDEA_KEY_SIZE, or dir is not IDEA_ENCRYPTION or IDEA_DECRYPTION.

Parameters

idea	Pointer to Idea structure.
key	Pointer to key in memory.
keySz	Size of key.
iv	Value for IV in Idea structure. Can be null.
dir	Direction, either IDEA_ENCRYPTION or IDEA_DECRYPTION

Example

byte v_key[IDEA_KEY_SIZE] = { }; // Some Key
Idea idea;
int ret = wc_IdeaSetKey(&idea v_key, IDEA_KEY_SIZE, NULL, IDEA_ENCRYPTION);
if (ret != 0)
{
    // There was an error
}

See also

wc_IdeaSetIV