aesb.c File Reference

#include <stdint.h>
#include "int-util.h"

Include dependency graph for aesb.c:

Macros
#define	TABLE_ALIGN   32
#define	WPOLY   0x011b
#define	N_COLS   4
#define	AES_BLOCK_SIZE   16
#define	RC_LENGTH   (5 * (AES_BLOCK_SIZE / 4 - 2))
#define	LOCAL_ALIGN
#define	rf1(r, c)   (r)
#define	word_in(x, c)   (*((uint32_t*)(x)+(c)))
#define	word_out(x, c, v)   (*((uint32_t*)(x)+(c)) = (v))
#define	s(x, c)   x[c]
#define	si(y, x, c)   (s(y,c) = word_in(x, c))
#define	so(y, x, c)   word_out(y, c, s(x,c))
#define	state_in(y, x)   si(y,x,0); si(y,x,1); si(y,x,2); si(y,x,3)
#define	state_out(y, x)   so(y,x,0); so(y,x,1); so(y,x,2); so(y,x,3)
#define	round(rm, y, x, k)   rm(y,x,k,0); rm(y,x,k,1); rm(y,x,k,2); rm(y,x,k,3)
#define	to_byte(x)   ((x) & 0xff)
#define	bval(x, n)   to_byte(SWAP32LE(x) >> (8 * (n)))
#define	fwd_var(x, r, c)
#define	fwd_rnd(y, x, k, c)   (s(y,c) = (k)[c] ^ SWAP32LE(four_tables(x,t_use(f,n),fwd_var,rf1,c)))
#define	sb_data(w)
#define	rc_data(w)
#define	bytes2word(b0, b1, b2, b3)
#define	h0(x)   (x)
#define	w0(p)   bytes2word(p, 0, 0, 0)
#define	w1(p)   bytes2word(0, p, 0, 0)
#define	w2(p)   bytes2word(0, 0, p, 0)
#define	w3(p)   bytes2word(0, 0, 0, p)
#define	u0(p)   bytes2word(f2(p), p, p, f3(p))
#define	u1(p)   bytes2word(f3(p), f2(p), p, p)
#define	u2(p)   bytes2word(p, f3(p), f2(p), p)
#define	u3(p)   bytes2word(p, p, f3(p), f2(p))
#define	v0(p)   bytes2word(fe(p), f9(p), fd(p), fb(p))
#define	v1(p)   bytes2word(fb(p), fe(p), f9(p), fd(p))
#define	v2(p)   bytes2word(fd(p), fb(p), fe(p), f9(p))
#define	v3(p)   bytes2word(f9(p), fd(p), fb(p), fe(p))
#define	f2(x)   ((x<<1) ^ (((x>>7) & 1) * WPOLY))
#define	f4(x)   ((x<<2) ^ (((x>>6) & 1) * WPOLY) ^ (((x>>6) & 2) * WPOLY))
#define	f8(x)   ((x<<3) ^ (((x>>5) & 1) * WPOLY) ^ (((x>>5) & 2) * WPOLY) ^ (((x>>5) & 4) * WPOLY))
#define	f3(x)   (f2(x) ^ x)
#define	f9(x)   (f8(x) ^ x)
#define	fb(x)   (f8(x) ^ f2(x) ^ x)
#define	fd(x)   (f8(x) ^ f4(x) ^ x)
#define	fe(x)   (f8(x) ^ f4(x) ^ f2(x))
#define	t_dec(m, n)   t_##m##n
#define	t_set(m, n)   t_##m##n
#define	t_use(m, n)   t_##m##n
#define	d_4(t, n, b, e, f, g, h)   LOCAL_ALIGN const t n[4][256] = { b(e), b(f), b(g), b(h) }
#define	four_tables(x, tab, vf, rf, c)
#define	STATIC
#define	INLINE

Functions
	d_4 (uint32_t, t_dec(f, n), sb_data, u0, u1, u2, u3)
STATIC INLINE void	aesb_single_round (const uint8_t *in, uint8_t *out, uint8_t *expandedKey)
STATIC INLINE void	aesb_pseudo_round (const uint8_t *in, uint8_t *out, uint8_t *expandedKey)

Macro Definition Documentation

AES_BLOCK_SIZE

#define AES_BLOCK_SIZE   16

bval

#define bval	(		x,
			n
	)		to_byte(SWAP32LE(x) >> (8 * (n)))

bytes2word

#define bytes2word	(		b0,
			b1,
			b2,
			b3
	)

Value:

    (((uint32_t)(b3) << 24) | \
    ((uint32_t)(b2) << 16) | ((uint32_t)(b1) << 8) | (b0))

d_4

#define d_4	(		t,
			n,
			b,
			e,
			f,
			g,
			h
	)		LOCAL_ALIGN const t n[4][256] = { b(e), b(f), b(g), b(h) }

f2

#define f2

(

x

)

((x<<1) ^ (((x>>7) & 1) * WPOLY))

f3

#define f3

(

x

)

(f2(x) ^ x)

f4

#define f4

(

x

)

((x<<2) ^ (((x>>6) & 1) * WPOLY) ^ (((x>>6) & 2) * WPOLY))

f8

#define f8

(

x

)

((x<<3) ^ (((x>>5) & 1) * WPOLY) ^ (((x>>5) & 2) * WPOLY) ^ (((x>>5) & 4) * WPOLY))

f9

#define f9

(

x

)

(f8(x) ^ x)

fb

#define fb

(

x

)

(f8(x) ^ f2(x) ^ x)

fd

#define fd

(

x

)

(f8(x) ^ f4(x) ^ x)

fe

#define fe

(

x

)

(f8(x) ^ f4(x) ^ f2(x))

four_tables

#define four_tables	(		x,
			tab,
			vf,
			rf,
			c
	)

Value:

  (tab[0][bval(vf(x,0,c),rf(0,c))] \
   ^ tab[1][bval(vf(x,1,c),rf(1,c))] \
   ^ tab[2][bval(vf(x,2,c),rf(2,c))] \
   ^ tab[3][bval(vf(x,3,c),rf(3,c))])

fwd_rnd

#define fwd_rnd	(		y,
			x,
			k,
			c
	)		(s(y,c) = (k)[c] ^ SWAP32LE(four_tables(x,t_use(f,n),fwd_var,rf1,c)))

fwd_var

#define fwd_var	(		x,
			r,
			c
	)

Value:

 ( r == 0 ? ( c == 0 ? s(x,0) : c == 1 ? s(x,1) : c == 2 ? s(x,2) : s(x,3))\
 : r == 1 ? ( c == 0 ? s(x,1) : c == 1 ? s(x,2) : c == 2 ? s(x,3) : s(x,0))\
 : r == 2 ? ( c == 0 ? s(x,2) : c == 1 ? s(x,3) : c == 2 ? s(x,0) : s(x,1))\
 :          ( c == 0 ? s(x,3) : c == 1 ? s(x,0) : c == 2 ? s(x,1) : s(x,2)))

h0

#define h0

(

x

)

(x)

INLINE

#define INLINE

LOCAL_ALIGN

#define LOCAL_ALIGN

N_COLS

#define N_COLS   4

rc_data

#define rc_data

(

w

)

Value:

  {\
  w(0x01), w(0x02), w(0x04), w(0x08), w(0x10),w(0x20), w(0x40), w(0x80),\
  w(0x1b), w(0x36) }

RC_LENGTH

#define RC_LENGTH   (5 * (AES_BLOCK_SIZE / 4 - 2))

rf1

#define rf1	(		r,
			c
	)		(r)

round

#define round	(		rm,
			y,
			x,
			k
	)		rm(y,x,k,0); rm(y,x,k,1); rm(y,x,k,2); rm(y,x,k,3)

s

#define s	(		x,
			c
	)		x[c]

sb_data

#define sb_data

(

w

)

si

#define si	(		y,
			x,
			c
	)		(s(y,c) = word_in(x, c))

so

#define so	(		y,
			x,
			c
	)		word_out(y, c, s(x,c))

state_in

#define state_in	(		y,
			x
	)		si(y,x,0); si(y,x,1); si(y,x,2); si(y,x,3)

state_out

#define state_out	(		y,
			x
	)		so(y,x,0); so(y,x,1); so(y,x,2); so(y,x,3)

STATIC

#define STATIC

t_dec

#define t_dec	(		m,
			n
	)		t_##m##n

t_set

#define t_set	(		m,
			n
	)		t_##m##n

t_use

#define t_use	(		m,
			n
	)		t_##m##n

TABLE_ALIGN

#define TABLE_ALIGN   32

to_byte

#define to_byte

(

x

)

((x) & 0xff)

u0

#define u0

(

p

)

bytes2word(f2(p), p, p, f3(p))

u1

#define u1

(

p

)

bytes2word(f3(p), f2(p), p, p)

u2

#define u2

(

p

)

bytes2word(p, f3(p), f2(p), p)

u3

#define u3

(

p

)

bytes2word(p, p, f3(p), f2(p))

v0

#define v0

(

p

)

bytes2word(fe(p), f9(p), fd(p), fb(p))

v1

#define v1

(

p

)

bytes2word(fb(p), fe(p), f9(p), fd(p))

v2

#define v2

(

p

)

bytes2word(fd(p), fb(p), fe(p), f9(p))

v3

#define v3

(

p

)

bytes2word(f9(p), fd(p), fb(p), fe(p))

w0

#define w0

(

p

)

bytes2word(p, 0, 0, 0)

w1

#define w1

(

p

)

bytes2word(0, p, 0, 0)

w2

#define w2

(

p

)

bytes2word(0, 0, p, 0)

w3

#define w3

(

p

)

bytes2word(0, 0, 0, p)

word_in

#define word_in	(		x,
			c
	)		(*((uint32_t*)(x)+(c)))

word_out

#define word_out	(		x,
			c,
			v
	)		(*((uint32_t*)(x)+(c)) = (v))

WPOLY

#define WPOLY   0x011b

Function Documentation

aesb_pseudo_round()

STATIC INLINE void aesb_pseudo_round	(	const uint8_t *	in,
		uint8_t *	out,
		uint8_t *	expandedKey
	)

aesb_single_round()

STATIC INLINE void aesb_single_round	(	const uint8_t *	in,
		uint8_t *	out,
		uint8_t *	expandedKey
	)

d_4()

d_4	(	uint32_t	,
		t_dec(f, n)	,
		sb_data	,
		u0	,
		u1	,
		u2	,
		u3
	)