[irc/quakenet/newserv.git] / lib / helix.h

#ifndef __helix_H
#define __helix_H

typedef unsigned long WORD;
typedef unsigned char UCHAR;

#define NONCE_LEN 16
#define MAC_LEN   16

/* HELIX variables */
typedef struct helix_ctx {
WORD	h_iplus8[2];		/* block number maintained in two parts */
WORD	K[8];			/* expanded key */
WORD	N[8];			/* expanded nonce */
int	l_u;			/* length of user key */
WORD	A, B, C, D, E;		/* Z_0..Z_4 in the paper */
} helix_ctx;

#undef TEST

void
h_key(struct helix_ctx *ctx, unsigned char *U, int U_len);
void
h_nonce(struct helix_ctx *ctx, UCHAR nonce[16]);
void
h_encrypt(struct helix_ctx *ctx, UCHAR *buf, int n, UCHAR macbuf[16]);
void
h_decrypt(struct helix_ctx *ctx, UCHAR *buf, int n, UCHAR macbuf[16]);

#endif
Commit	Line	Data
18f8bd28 CP	1	#ifndef __helix_H
	2	#define __helix_H
	3
	4	typedef unsigned long WORD;
	5	typedef unsigned char UCHAR;
	6
	7	#define NONCE_LEN 16
	8	#define MAC_LEN 16
	9
	10	/* HELIX variables */
	11	typedef struct helix_ctx {
	12	WORD h_iplus8[2]; /* block number maintained in two parts */
	13	WORD K[8]; /* expanded key */
	14	WORD N[8]; /* expanded nonce */
	15	int l_u; /* length of user key */
	16	WORD A, B, C, D, E; /* Z_0..Z_4 in the paper */
	17	} helix_ctx;
	18
	19	#undef TEST
	20
	21	void
	22	h_key(struct helix_ctx ctx, unsigned char U, int U_len);
	23	void
	24	h_nonce(struct helix_ctx *ctx, UCHAR nonce[16]);
	25	void
	26	h_encrypt(struct helix_ctx ctx, UCHAR buf, int n, UCHAR macbuf[16]);
	27	void
	28	h_decrypt(struct helix_ctx ctx, UCHAR buf, int n, UCHAR macbuf[16]);
	29
	30	#endif