arc4.h File Reference

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	arc4_ctx

Macros
#define	ARC4_CTX_SIZE   sizeof ( struct arc4_ctx )

Functions
	FILE_LICENCE (GPL2_OR_LATER)
void	arc4_skip (const void *key, size_t keylen, size_t skip, const void *src, void *dst, size_t msglen)
	Perform ARC4 encryption or decryption, skipping initial keystream bytes.

Variables
struct cipher_algorithm	arc4_algorithm

Macro Definition Documentation

ARC4_CTX_SIZE

#define ARC4_CTX_SIZE   sizeof ( struct arc4_ctx )

Definition at line 15 of file arc4.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

arc4_skip()

void arc4_skip	(	const void *	key,
		size_t	keylen,
		size_t	skip,
		const void *	src,
		void *	dst,
		size_t	msglen )

Perform ARC4 encryption or decryption, skipping initial keystream bytes.

Parameters

key	ARC4 encryption key
keylen	Key length
skip	Number of bytes of keystream to skip
src	Message to encrypt or decrypt
msglen	Length of message

Return values

dst	Encrypted or decrypted message

Definition at line 112 of file arc4.c.

{
        struct cipher_algorithm *cipher = &arc4_algorithm;
        struct arc4_ctx ctx;
 
        arc4_setkey ( cipher, &ctx, key, keylen );
        arc4_xor ( cipher, &ctx, NULL, NULL, skip );
        arc4_xor ( cipher, &ctx, src, dst, msglen );
}

References arc4_algorithm, arc4_setkey(), arc4_xor(), ctx, key, NULL, and src.

Referenced by tkip_kie_decrypt().

Variable Documentation

arc4_algorithm

struct cipher_algorithm arc4_algorithm

extern

Definition at line 123 of file arc4.c.

                                       {
        .name = "ARC4",
        .ctxsize = ARC4_CTX_SIZE,
        .blocksize = 1,
        .alignsize = 1,
        .authsize = 0,
        .confidential = 1,
        .setkey = arc4_setkey,
        .setiv = cipher_null_setiv,
        .encrypt = arc4_xor,
        .decrypt = arc4_xor,
        .auth = cipher_null_auth,
};

Referenced by arc4_skip(), tkip_decrypt(), tkip_encrypt(), wep_decrypt(), and wep_encrypt().