crypto: camellia - use kernel-provided bitops, unaligned access
Remove the private implementation of 32-bit rotation and unaligned access with byteswapping. As a bonus, fixes sparse warnings: crypto/camellia.c:602:2: warning: cast to restricted __be32 crypto/camellia.c:603:2: warning: cast to restricted __be32 crypto/camellia.c:604:2: warning: cast to restricted __be32 crypto/camellia.c:605:2: warning: cast to restricted __be32 crypto/camellia.c:710:2: warning: cast to restricted __be32 crypto/camellia.c:711:2: warning: cast to restricted __be32 crypto/camellia.c:712:2: warning: cast to restricted __be32 crypto/camellia.c:713:2: warning: cast to restricted __be32 crypto/camellia.c:714:2: warning: cast to restricted __be32 crypto/camellia.c:715:2: warning: cast to restricted __be32 crypto/camellia.c:716:2: warning: cast to restricted __be32 crypto/camellia.c:717:2: warning: cast to restricted __be32 [Thanks to Tomoyuki Okazaki for spotting the typo] Tested-by: Carlo E. Prelz <fluido@fluido.as> Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Harvey Harrison
Herbert Xu
parent
d12d6b6d37
commit
32bd78e0a5
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@ -35,6 +35,8 @@
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/bitops.h>
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#include <asm/unaligned.h>
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static const u32 camellia_sp1110[256] = {
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0x70707000,0x82828200,0x2c2c2c00,0xececec00,
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@ -335,20 +337,6 @@ static const u32 camellia_sp4404[256] = {
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/*
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* macros
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*/
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#define GETU32(v, pt) \
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do { \
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/* latest breed of gcc is clever enough to use move */ \
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memcpy(&(v), (pt), 4); \
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(v) = be32_to_cpu(v); \
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} while(0)
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/* rotation right shift 1byte */
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#define ROR8(x) (((x) >> 8) + ((x) << 24))
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/* rotation left shift 1bit */
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#define ROL1(x) (((x) << 1) + ((x) >> 31))
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/* rotation left shift 1byte */
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#define ROL8(x) (((x) << 8) + ((x) >> 24))
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#define ROLDQ(ll, lr, rl, rr, w0, w1, bits) \
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do { \
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w0 = ll; \
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@ -383,7 +371,7 @@ static const u32 camellia_sp4404[256] = {
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^ camellia_sp3033[(u8)(il >> 8)] \
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^ camellia_sp4404[(u8)(il )]; \
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yl ^= yr; \
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yr = ROR8(yr); \
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yr = ror32(yr, 8); \
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yr ^= yl; \
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} while(0)
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@ -405,7 +393,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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subL[7] ^= subL[1]; subR[7] ^= subR[1];
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subL[1] ^= subR[1] & ~subR[9];
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dw = subL[1] & subL[9],
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subR[1] ^= ROL1(dw); /* modified for FLinv(kl2) */
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subR[1] ^= rol32(dw, 1); /* modified for FLinv(kl2) */
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/* round 8 */
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subL[11] ^= subL[1]; subR[11] ^= subR[1];
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/* round 10 */
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@ -414,7 +402,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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subL[15] ^= subL[1]; subR[15] ^= subR[1];
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subL[1] ^= subR[1] & ~subR[17];
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dw = subL[1] & subL[17],
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subR[1] ^= ROL1(dw); /* modified for FLinv(kl4) */
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subR[1] ^= rol32(dw, 1); /* modified for FLinv(kl4) */
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/* round 14 */
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subL[19] ^= subL[1]; subR[19] ^= subR[1];
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/* round 16 */
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@ -430,7 +418,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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} else {
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subL[1] ^= subR[1] & ~subR[25];
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dw = subL[1] & subL[25],
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subR[1] ^= ROL1(dw); /* modified for FLinv(kl6) */
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subR[1] ^= rol32(dw, 1); /* modified for FLinv(kl6) */
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/* round 20 */
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subL[27] ^= subL[1]; subR[27] ^= subR[1];
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/* round 22 */
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@ -450,7 +438,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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subL[26] ^= kw4l; subR[26] ^= kw4r;
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kw4l ^= kw4r & ~subR[24];
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dw = kw4l & subL[24],
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kw4r ^= ROL1(dw); /* modified for FL(kl5) */
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kw4r ^= rol32(dw, 1); /* modified for FL(kl5) */
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}
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/* round 17 */
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subL[22] ^= kw4l; subR[22] ^= kw4r;
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@ -460,7 +448,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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subL[18] ^= kw4l; subR[18] ^= kw4r;
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kw4l ^= kw4r & ~subR[16];
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dw = kw4l & subL[16],
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kw4r ^= ROL1(dw); /* modified for FL(kl3) */
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kw4r ^= rol32(dw, 1); /* modified for FL(kl3) */
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/* round 11 */
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subL[14] ^= kw4l; subR[14] ^= kw4r;
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/* round 9 */
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@ -469,7 +457,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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subL[10] ^= kw4l; subR[10] ^= kw4r;
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kw4l ^= kw4r & ~subR[8];
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dw = kw4l & subL[8],
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kw4r ^= ROL1(dw); /* modified for FL(kl1) */
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kw4r ^= rol32(dw, 1); /* modified for FL(kl1) */
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/* round 5 */
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subL[6] ^= kw4l; subR[6] ^= kw4r;
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/* round 3 */
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@ -494,7 +482,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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SUBKEY_R(6) = subR[5] ^ subR[7];
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tl = subL[10] ^ (subR[10] & ~subR[8]);
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dw = tl & subL[8], /* FL(kl1) */
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tr = subR[10] ^ ROL1(dw);
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tr = subR[10] ^ rol32(dw, 1);
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SUBKEY_L(7) = subL[6] ^ tl; /* round 6 */
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SUBKEY_R(7) = subR[6] ^ tr;
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SUBKEY_L(8) = subL[8]; /* FL(kl1) */
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@ -503,7 +491,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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SUBKEY_R(9) = subR[9];
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tl = subL[7] ^ (subR[7] & ~subR[9]);
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dw = tl & subL[9], /* FLinv(kl2) */
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tr = subR[7] ^ ROL1(dw);
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tr = subR[7] ^ rol32(dw, 1);
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SUBKEY_L(10) = tl ^ subL[11]; /* round 7 */
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SUBKEY_R(10) = tr ^ subR[11];
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SUBKEY_L(11) = subL[10] ^ subL[12]; /* round 8 */
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@ -516,7 +504,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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SUBKEY_R(14) = subR[13] ^ subR[15];
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tl = subL[18] ^ (subR[18] & ~subR[16]);
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dw = tl & subL[16], /* FL(kl3) */
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tr = subR[18] ^ ROL1(dw);
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tr = subR[18] ^ rol32(dw, 1);
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SUBKEY_L(15) = subL[14] ^ tl; /* round 12 */
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SUBKEY_R(15) = subR[14] ^ tr;
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SUBKEY_L(16) = subL[16]; /* FL(kl3) */
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@ -525,7 +513,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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SUBKEY_R(17) = subR[17];
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tl = subL[15] ^ (subR[15] & ~subR[17]);
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dw = tl & subL[17], /* FLinv(kl4) */
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tr = subR[15] ^ ROL1(dw);
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tr = subR[15] ^ rol32(dw, 1);
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SUBKEY_L(18) = tl ^ subL[19]; /* round 13 */
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SUBKEY_R(18) = tr ^ subR[19];
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SUBKEY_L(19) = subL[18] ^ subL[20]; /* round 14 */
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@ -544,7 +532,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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} else {
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tl = subL[26] ^ (subR[26] & ~subR[24]);
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dw = tl & subL[24], /* FL(kl5) */
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tr = subR[26] ^ ROL1(dw);
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tr = subR[26] ^ rol32(dw, 1);
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SUBKEY_L(23) = subL[22] ^ tl; /* round 18 */
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SUBKEY_R(23) = subR[22] ^ tr;
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SUBKEY_L(24) = subL[24]; /* FL(kl5) */
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@ -553,7 +541,7 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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SUBKEY_R(25) = subR[25];
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tl = subL[23] ^ (subR[23] & ~subR[25]);
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dw = tl & subL[25], /* FLinv(kl6) */
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tr = subR[23] ^ ROL1(dw);
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tr = subR[23] ^ rol32(dw, 1);
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SUBKEY_L(26) = tl ^ subL[27]; /* round 19 */
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SUBKEY_R(26) = tr ^ subR[27];
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SUBKEY_L(27) = subL[26] ^ subL[28]; /* round 20 */
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@ -573,17 +561,17 @@ static void camellia_setup_tail(u32 *subkey, u32 *subL, u32 *subR, int max)
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/* apply the inverse of the last half of P-function */
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i = 2;
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do {
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dw = SUBKEY_L(i + 0) ^ SUBKEY_R(i + 0); dw = ROL8(dw);/* round 1 */
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dw = SUBKEY_L(i + 0) ^ SUBKEY_R(i + 0); dw = rol32(dw, 8);/* round 1 */
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SUBKEY_R(i + 0) = SUBKEY_L(i + 0) ^ dw; SUBKEY_L(i + 0) = dw;
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dw = SUBKEY_L(i + 1) ^ SUBKEY_R(i + 1); dw = ROL8(dw);/* round 2 */
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dw = SUBKEY_L(i + 1) ^ SUBKEY_R(i + 1); dw = rol32(dw, 8);/* round 2 */
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SUBKEY_R(i + 1) = SUBKEY_L(i + 1) ^ dw; SUBKEY_L(i + 1) = dw;
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dw = SUBKEY_L(i + 2) ^ SUBKEY_R(i + 2); dw = ROL8(dw);/* round 3 */
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dw = SUBKEY_L(i + 2) ^ SUBKEY_R(i + 2); dw = rol32(dw, 8);/* round 3 */
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SUBKEY_R(i + 2) = SUBKEY_L(i + 2) ^ dw; SUBKEY_L(i + 2) = dw;
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dw = SUBKEY_L(i + 3) ^ SUBKEY_R(i + 3); dw = ROL8(dw);/* round 4 */
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dw = SUBKEY_L(i + 3) ^ SUBKEY_R(i + 3); dw = rol32(dw, 8);/* round 4 */
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SUBKEY_R(i + 3) = SUBKEY_L(i + 3) ^ dw; SUBKEY_L(i + 3) = dw;
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dw = SUBKEY_L(i + 4) ^ SUBKEY_R(i + 4); dw = ROL8(dw);/* round 5 */
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dw = SUBKEY_L(i + 4) ^ SUBKEY_R(i + 4); dw = rol32(dw, 8);/* round 5 */
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SUBKEY_R(i + 4) = SUBKEY_L(i + 4) ^ dw; SUBKEY_L(i + 4) = dw;
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dw = SUBKEY_L(i + 5) ^ SUBKEY_R(i + 5); dw = ROL8(dw);/* round 6 */
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dw = SUBKEY_L(i + 5) ^ SUBKEY_R(i + 5); dw = rol32(dw, 8);/* round 6 */
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SUBKEY_R(i + 5) = SUBKEY_L(i + 5) ^ dw; SUBKEY_L(i + 5) = dw;
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i += 8;
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} while (i < max);
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@ -599,10 +587,10 @@ static void camellia_setup128(const unsigned char *key, u32 *subkey)
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/**
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* k == kll || klr || krl || krr (|| is concatenation)
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*/
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GETU32(kll, key );
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GETU32(klr, key + 4);
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GETU32(krl, key + 8);
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GETU32(krr, key + 12);
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kll = get_unaligned_be32(key);
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klr = get_unaligned_be32(key + 4);
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krl = get_unaligned_be32(key + 8);
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krr = get_unaligned_be32(key + 12);
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/* generate KL dependent subkeys */
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/* kw1 */
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@ -707,14 +695,14 @@ static void camellia_setup256(const unsigned char *key, u32 *subkey)
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* key = (kll || klr || krl || krr || krll || krlr || krrl || krrr)
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* (|| is concatenation)
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*/
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GETU32(kll, key );
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GETU32(klr, key + 4);
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GETU32(krl, key + 8);
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GETU32(krr, key + 12);
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GETU32(krll, key + 16);
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GETU32(krlr, key + 20);
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GETU32(krrl, key + 24);
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GETU32(krrr, key + 28);
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kll = get_unaligned_be32(key);
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klr = get_unaligned_be32(key + 4);
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krl = get_unaligned_be32(key + 8);
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krr = get_unaligned_be32(key + 12);
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krll = get_unaligned_be32(key + 16);
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krlr = get_unaligned_be32(key + 20);
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krrl = get_unaligned_be32(key + 24);
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krrr = get_unaligned_be32(key + 28);
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/* generate KL dependent subkeys */
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/* kw1 */
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@ -870,13 +858,13 @@ static void camellia_setup192(const unsigned char *key, u32 *subkey)
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t0 &= ll; \
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t2 |= rr; \
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rl ^= t2; \
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lr ^= ROL1(t0); \
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lr ^= rol32(t0, 1); \
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t3 = krl; \
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t1 = klr; \
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t3 &= rl; \
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t1 |= lr; \
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ll ^= t1; \
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rr ^= ROL1(t3); \
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rr ^= rol32(t3, 1); \
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} while(0)
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#define CAMELLIA_ROUNDSM(xl, xr, kl, kr, yl, yr, il, ir) \
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@ -892,7 +880,7 @@ static void camellia_setup192(const unsigned char *key, u32 *subkey)
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il ^= kl; \
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ir ^= il ^ kr; \
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yl ^= ir; \
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yr ^= ROR8(il) ^ ir; \
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yr ^= ror32(il, 8) ^ ir; \
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} while(0)
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/* max = 24: 128bit encrypt, max = 32: 256bit encrypt */
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