GSM A5 ciphering algorithm

Files
file	a5.h

Functions
static uint32_t	osmo_a5_fn_count (uint32_t fn)
int	osmo_a5 (int n, const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul)
void	osmo_a5_1 (const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) OSMO_DEPRECATED("Use generic osmo_a5() instead")
void	osmo_a5_2 (const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) OSMO_DEPRECATED("Use generic osmo_a5() instead")

Detailed Description

Function Documentation

osmo_a5()

int osmo_a5	(	int	n,
		const uint8_t *	key,
		uint32_t	fn,
		ubit_t *	dl,
		ubit_t *	ul
	)

osmo_a5_1()

void osmo_a5_1	(	const uint8_t *	key,
		uint32_t	fn,
		ubit_t *	dl,
		ubit_t *	ul
	)

osmo_a5_2()

void osmo_a5_2	(	const uint8_t *	key,
		uint32_t	fn,
		ubit_t *	dl,
		ubit_t *	ul
	)

osmo_a5_fn_count()

static uint32_t osmo_a5_fn_count ( uint32_t  fn )

inlinestatic

Converts a frame number into the 22 bit number used in A5/x

Parameters

[in]

fn

The true framenumber

Returns

22 bit word

References t1, t2, and t3.