Commit ff85a808 authored by Denys Vlasenko's avatar Denys Vlasenko Committed by Herbert Xu
Browse files

[CRYPTO] camellia: Move more common code into camellia_setup_tail 



Analogously to camellia7 patch, move
"absorb kw2 to other subkeys" and "absorb kw4 to other subkeys"
code parts into camellia_setup_tail(). This further reduces
source and object code size at the cost of two brances
in key setup code.

Signed-off-by: default avatarDenys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent dedcf8b0

crypto/camellia.c

+84 −134
Original line number Diff line number Diff line
@@ -393,8 +393,92 @@ static const u32 camellia_sp4404[256] = { 
static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)

{

	u32 dw, tl, tr;

	u32 kw4l, kw4r;

	int i;



	/* absorb kw2 to other subkeys */

	/* round 2 */

	subL[3] ^= subL[1]; subR[3] ^= subR[1];

	/* round 4 */

	subL[5] ^= subL[1]; subR[5] ^= subR[1];

	/* round 6 */

	subL[7] ^= subL[1]; subR[7] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[9];

	dw = subL[1] & subL[9],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl2) */

	/* round 8 */

	subL[11] ^= subL[1]; subR[11] ^= subR[1];

	/* round 10 */

	subL[13] ^= subL[1]; subR[13] ^= subR[1];

	/* round 12 */

	subL[15] ^= subL[1]; subR[15] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[17];

	dw = subL[1] & subL[17],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl4) */

	/* round 14 */

	subL[19] ^= subL[1]; subR[19] ^= subR[1];

	/* round 16 */

	subL[21] ^= subL[1]; subR[21] ^= subR[1];

	/* round 18 */

	subL[23] ^= subL[1]; subR[23] ^= subR[1];

	if (max == 24) {

		/* kw3 */

		subL[24] ^= subL[1]; subR[24] ^= subR[1];



	/* absorb kw4 to other subkeys */

		kw4l = subL[25]; kw4r = subR[25];

	} else {

		subL[1] ^= subR[1] & ~subR[25];

		dw = subL[1] & subL[25],

			subR[1] ^= ROL1(dw); /* modified for FLinv(kl6) */

		/* round 20 */

		subL[27] ^= subL[1]; subR[27] ^= subR[1];

		/* round 22 */

		subL[29] ^= subL[1]; subR[29] ^= subR[1];

		/* round 24 */

		subL[31] ^= subL[1]; subR[31] ^= subR[1];

		/* kw3 */

		subL[32] ^= subL[1]; subR[32] ^= subR[1];



	/* absorb kw4 to other subkeys */

		kw4l = subL[33]; kw4r = subR[33];

		/* round 23 */

		subL[30] ^= kw4l; subR[30] ^= kw4r;

		/* round 21 */

		subL[28] ^= kw4l; subR[28] ^= kw4r;

		/* round 19 */

		subL[26] ^= kw4l; subR[26] ^= kw4r;

		kw4l ^= kw4r & ~subR[24];

		dw = kw4l & subL[24],

			kw4r ^= ROL1(dw); /* modified for FL(kl5) */

	}

	/* round 17 */

	subL[22] ^= kw4l; subR[22] ^= kw4r;

	/* round 15 */

	subL[20] ^= kw4l; subR[20] ^= kw4r;

	/* round 13 */

	subL[18] ^= kw4l; subR[18] ^= kw4r;

	kw4l ^= kw4r & ~subR[16];

	dw = kw4l & subL[16],

		kw4r ^= ROL1(dw); /* modified for FL(kl3) */

	/* round 11 */

	subL[14] ^= kw4l; subR[14] ^= kw4r;

	/* round 9 */

	subL[12] ^= kw4l; subR[12] ^= kw4r;

	/* round 7 */

	subL[10] ^= kw4l; subR[10] ^= kw4r;

	kw4l ^= kw4r & ~subR[8];

	dw = kw4l & subL[8],

		kw4r ^= ROL1(dw); /* modified for FL(kl1) */

	/* round 5 */

	subL[6] ^= kw4l; subR[6] ^= kw4r;

	/* round 3 */

	subL[4] ^= kw4l; subR[4] ^= kw4r;

	/* round 1 */

	subL[2] ^= kw4l; subR[2] ^= kw4r;

	/* kw1 */

	subL[0] ^= kw4l; subR[0] ^= kw4r;



	/* key XOR is end of F-function */

	SUBKEY_L(0) = subL[0] ^ subL[2];/* kw1 */

	SUBKEY_R(0) = subR[0] ^ subR[2];
@@ -509,7 +593,6 @@ static void camellia_setup128(const unsigned char *key, u32 *subkey) 
{

	u32 kll, klr, krl, krr;

	u32 il, ir, t0, t1, w0, w1;

	u32 kw4l, kw4r, dw;

	u32 subL[26];

	u32 subR[26];
@@ -609,63 +692,6 @@ static void camellia_setup128(const unsigned char *key, u32 *subkey) 
	subL[24] = kll; subR[24] = klr;

	subL[25] = krl; subR[25] = krr;



	/* absorb kw2 to other subkeys */

	/* round 2 */

	subL[3] ^= subL[1]; subR[3] ^= subR[1];

	/* round 4 */

	subL[5] ^= subL[1]; subR[5] ^= subR[1];

	/* round 6 */

	subL[7] ^= subL[1]; subR[7] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[9];

	dw = subL[1] & subL[9],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl2) */

	/* round 8 */

	subL[11] ^= subL[1]; subR[11] ^= subR[1];

	/* round 10 */

	subL[13] ^= subL[1]; subR[13] ^= subR[1];

	/* round 12 */

	subL[15] ^= subL[1]; subR[15] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[17];

	dw = subL[1] & subL[17],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl4) */

	/* round 14 */

	subL[19] ^= subL[1]; subR[19] ^= subR[1];

	/* round 16 */

	subL[21] ^= subL[1]; subR[21] ^= subR[1];

	/* round 18 */

	subL[23] ^= subL[1]; subR[23] ^= subR[1];

	/* kw3 */

	subL[24] ^= subL[1]; subR[24] ^= subR[1];



	/* absorb kw4 to other subkeys */

	kw4l = subL[25]; kw4r = subR[25];

	/* round 17 */

	subL[22] ^= kw4l; subR[22] ^= kw4r;

	/* round 15 */

	subL[20] ^= kw4l; subR[20] ^= kw4r;

	/* round 13 */

	subL[18] ^= kw4l; subR[18] ^= kw4r;

	kw4l ^= kw4r & ~subR[16];

	dw = kw4l & subL[16],

		kw4r ^= ROL1(dw); /* modified for FL(kl3) */

	/* round 11 */

	subL[14] ^= kw4l; subR[14] ^= kw4r;

	/* round 9 */

	subL[12] ^= kw4l; subR[12] ^= kw4r;

	/* round 7 */

	subL[10] ^= kw4l; subR[10] ^= kw4r;

	kw4l ^= kw4r & ~subR[8];

	dw = kw4l & subL[8],

		kw4r ^= ROL1(dw); /* modified for FL(kl1) */

	/* round 5 */

	subL[6] ^= kw4l; subR[6] ^= kw4r;

	/* round 3 */

	subL[4] ^= kw4l; subR[4] ^= kw4r;

	/* round 1 */

	subL[2] ^= kw4l; subR[2] ^= kw4r;

	/* kw1 */

	subL[0] ^= kw4l; subR[0] ^= kw4r;



	camellia_setup_tail(subkey, subL, subR, 24);

}
@@ -674,7 +700,6 @@ static void camellia_setup256(const unsigned char *key, u32 *subkey) 
	u32 kll, klr, krl, krr;        /* left half of key */

	u32 krll, krlr, krrl, krrr;    /* right half of key */

	u32 il, ir, t0, t1, w0, w1;    /* temporary variables */

	u32 kw4l, kw4r, dw;

	u32 subL[34];

	u32 subR[34];
@@ -816,81 +841,6 @@ static void camellia_setup256(const unsigned char *key, u32 *subkey) 
	/* kw4 */

	subL[33] = krrl; subR[33] = krrr;



	/* absorb kw2 to other subkeys */

	/* round 2 */

	subL[3] ^= subL[1]; subR[3] ^= subR[1];

	/* round 4 */

	subL[5] ^= subL[1]; subR[5] ^= subR[1];

	/* round 6 */

	subL[7] ^= subL[1]; subR[7] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[9];

	dw = subL[1] & subL[9],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl2) */

	/* round 8 */

	subL[11] ^= subL[1]; subR[11] ^= subR[1];

	/* round 10 */

	subL[13] ^= subL[1]; subR[13] ^= subR[1];

	/* round 12 */

	subL[15] ^= subL[1]; subR[15] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[17];

	dw = subL[1] & subL[17],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl4) */

	/* round 14 */

	subL[19] ^= subL[1]; subR[19] ^= subR[1];

	/* round 16 */

	subL[21] ^= subL[1]; subR[21] ^= subR[1];

	/* round 18 */

	subL[23] ^= subL[1]; subR[23] ^= subR[1];

	subL[1] ^= subR[1] & ~subR[25];

	dw = subL[1] & subL[25],

		subR[1] ^= ROL1(dw); /* modified for FLinv(kl6) */

	/* round 20 */

	subL[27] ^= subL[1]; subR[27] ^= subR[1];

	/* round 22 */

	subL[29] ^= subL[1]; subR[29] ^= subR[1];

	/* round 24 */

	subL[31] ^= subL[1]; subR[31] ^= subR[1];

	/* kw3 */

	subL[32] ^= subL[1]; subR[32] ^= subR[1];



	/* absorb kw4 to other subkeys */

	kw4l = subL[33]; kw4r = subR[33];

	/* round 23 */

	subL[30] ^= kw4l; subR[30] ^= kw4r;

	/* round 21 */

	subL[28] ^= kw4l; subR[28] ^= kw4r;

	/* round 19 */

	subL[26] ^= kw4l; subR[26] ^= kw4r;

	kw4l ^= kw4r & ~subR[24];

	dw = kw4l & subL[24],

		kw4r ^= ROL1(dw); /* modified for FL(kl5) */

	/* round 17 */

	subL[22] ^= kw4l; subR[22] ^= kw4r;

	/* round 15 */

	subL[20] ^= kw4l; subR[20] ^= kw4r;

	/* round 13 */

	subL[18] ^= kw4l; subR[18] ^= kw4r;

	kw4l ^= kw4r & ~subR[16];

	dw = kw4l & subL[16],

		kw4r ^= ROL1(dw); /* modified for FL(kl3) */

	/* round 11 */

	subL[14] ^= kw4l; subR[14] ^= kw4r;

	/* round 9 */

	subL[12] ^= kw4l; subR[12] ^= kw4r;

	/* round 7 */

	subL[10] ^= kw4l; subR[10] ^= kw4r;

	kw4l ^= kw4r & ~subR[8];

	dw = kw4l & subL[8],

		kw4r ^= ROL1(dw); /* modified for FL(kl1) */

	/* round 5 */

	subL[6] ^= kw4l; subR[6] ^= kw4r;

	/* round 3 */

	subL[4] ^= kw4l; subR[4] ^= kw4r;

	/* round 1 */

	subL[2] ^= kw4l; subR[2] ^= kw4r;

	/* kw1 */

	subL[0] ^= kw4l; subR[0] ^= kw4r;



	camellia_setup_tail(subkey, subL, subR, 32);

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE