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-rw-r--r--crypto/cast6.c122
1 files changed, 62 insertions, 60 deletions
diff --git a/crypto/cast6.c b/crypto/cast6.c
index 007d02b..e0c15a6 100644
--- a/crypto/cast6.c
+++ b/crypto/cast6.c
@@ -11,7 +11,7 @@
* under the terms of GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
@@ -35,12 +35,12 @@ struct cast6_ctx {
u8 Kr[12][4];
};
-#define F1(D,r,m) ( (I = ((m) + (D))), (I=rol32(I,(r))), \
- (((s1[I >> 24] ^ s2[(I>>16)&0xff]) - s3[(I>>8)&0xff]) + s4[I&0xff]) )
-#define F2(D,r,m) ( (I = ((m) ^ (D))), (I=rol32(I,(r))), \
- (((s1[I >> 24] - s2[(I>>16)&0xff]) + s3[(I>>8)&0xff]) ^ s4[I&0xff]) )
-#define F3(D,r,m) ( (I = ((m) - (D))), (I=rol32(I,(r))), \
- (((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]) )
+#define F1(D, r, m) ((I = ((m) + (D))), (I = rol32(I, (r))), \
+ (((s1[I >> 24] ^ s2[(I>>16)&0xff]) - s3[(I>>8)&0xff]) + s4[I&0xff]))
+#define F2(D, r, m) ((I = ((m) ^ (D))), (I = rol32(I, (r))), \
+ (((s1[I >> 24] - s2[(I>>16)&0xff]) + s3[(I>>8)&0xff]) ^ s4[I&0xff]))
+#define F3(D, r, m) ((I = ((m) - (D))), (I = rol32(I, (r))), \
+ (((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]))
static const u32 s1[256] = {
0x30fb40d4, 0x9fa0ff0b, 0x6beccd2f, 0x3f258c7a, 0x1e213f2f,
@@ -312,7 +312,7 @@ static const u32 s4[256] = {
static const u32 Tm[24][8] = {
{ 0x5a827999, 0xc95c653a, 0x383650db, 0xa7103c7c, 0x15ea281d,
- 0x84c413be, 0xf39dff5f, 0x6277eb00 } ,
+ 0x84c413be, 0xf39dff5f, 0x6277eb00 } ,
{ 0xd151d6a1, 0x402bc242, 0xaf05ade3, 0x1ddf9984, 0x8cb98525,
0xfb9370c6, 0x6a6d5c67, 0xd9474808 } ,
{ 0x482133a9, 0xb6fb1f4a, 0x25d50aeb, 0x94aef68c, 0x0388e22d,
@@ -369,7 +369,8 @@ static const u8 Tr[4][8] = {
};
/* forward octave */
-static void W(u32 *key, unsigned int i) {
+static void W(u32 *key, unsigned int i)
+{
u32 I;
key[6] ^= F1(key[7], Tr[i % 4][0], Tm[i][0]);
key[5] ^= F2(key[6], Tr[i % 4][1], Tm[i][1]);
@@ -377,7 +378,7 @@ static void W(u32 *key, unsigned int i) {
key[3] ^= F1(key[4], Tr[i % 4][3], Tm[i][3]);
key[2] ^= F2(key[3], Tr[i % 4][4], Tm[i][4]);
key[1] ^= F3(key[2], Tr[i % 4][5], Tm[i][5]);
- key[0] ^= F1(key[1], Tr[i % 4][6], Tm[i][6]);
+ key[0] ^= F1(key[1], Tr[i % 4][6], Tm[i][6]);
key[7] ^= F2(key[0], Tr[i % 4][7], Tm[i][7]);
}
@@ -393,11 +394,11 @@ static int cast6_setkey(struct crypto_tfm *tfm, const u8 *in_key,
if (key_len % 4 != 0) {
*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
- }
+ }
+
+ memset(p_key, 0, 32);
+ memcpy(p_key, in_key, key_len);
- memset (p_key, 0, 32);
- memcpy (p_key, in_key, key_len);
-
key[0] = be32_to_cpu(p_key[0]); /* A */
key[1] = be32_to_cpu(p_key[1]); /* B */
key[2] = be32_to_cpu(p_key[2]); /* C */
@@ -406,18 +407,16 @@ static int cast6_setkey(struct crypto_tfm *tfm, const u8 *in_key,
key[5] = be32_to_cpu(p_key[5]); /* F */
key[6] = be32_to_cpu(p_key[6]); /* G */
key[7] = be32_to_cpu(p_key[7]); /* H */
-
-
for (i = 0; i < 12; i++) {
- W (key, 2 * i);
- W (key, 2 * i + 1);
-
+ W(key, 2 * i);
+ W(key, 2 * i + 1);
+
c->Kr[i][0] = key[0] & 0x1f;
c->Kr[i][1] = key[2] & 0x1f;
c->Kr[i][2] = key[4] & 0x1f;
c->Kr[i][3] = key[6] & 0x1f;
-
+
c->Km[i][0] = key[7];
c->Km[i][1] = key[5];
c->Km[i][2] = key[3];
@@ -428,21 +427,23 @@ static int cast6_setkey(struct crypto_tfm *tfm, const u8 *in_key,
}
/*forward quad round*/
-static void Q (u32 * block, u8 * Kr, u32 * Km) {
+static void Q(u32 *block, u8 *Kr, u32 *Km)
+{
u32 I;
block[2] ^= F1(block[3], Kr[0], Km[0]);
block[1] ^= F2(block[2], Kr[1], Km[1]);
block[0] ^= F3(block[1], Kr[2], Km[2]);
- block[3] ^= F1(block[0], Kr[3], Km[3]);
+ block[3] ^= F1(block[0], Kr[3], Km[3]);
}
/*reverse quad round*/
-static void QBAR (u32 * block, u8 * Kr, u32 * Km) {
+static void QBAR(u32 *block, u8 *Kr, u32 *Km)
+{
u32 I;
- block[3] ^= F1(block[0], Kr[3], Km[3]);
- block[0] ^= F3(block[1], Kr[2], Km[2]);
- block[1] ^= F2(block[2], Kr[1], Km[1]);
- block[2] ^= F1(block[3], Kr[0], Km[0]);
+ block[3] ^= F1(block[0], Kr[3], Km[3]);
+ block[0] ^= F3(block[1], Kr[2], Km[2]);
+ block[1] ^= F2(block[2], Kr[1], Km[1]);
+ block[2] ^= F1(block[3], Kr[0], Km[0]);
}
static void cast6_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
@@ -451,64 +452,65 @@ static void cast6_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
const __be32 *src = (const __be32 *)inbuf;
__be32 *dst = (__be32 *)outbuf;
u32 block[4];
- u32 * Km;
- u8 * Kr;
+ u32 *Km;
+ u8 *Kr;
block[0] = be32_to_cpu(src[0]);
block[1] = be32_to_cpu(src[1]);
block[2] = be32_to_cpu(src[2]);
block[3] = be32_to_cpu(src[3]);
- Km = c->Km[0]; Kr = c->Kr[0]; Q (block, Kr, Km);
- Km = c->Km[1]; Kr = c->Kr[1]; Q (block, Kr, Km);
- Km = c->Km[2]; Kr = c->Kr[2]; Q (block, Kr, Km);
- Km = c->Km[3]; Kr = c->Kr[3]; Q (block, Kr, Km);
- Km = c->Km[4]; Kr = c->Kr[4]; Q (block, Kr, Km);
- Km = c->Km[5]; Kr = c->Kr[5]; Q (block, Kr, Km);
- Km = c->Km[6]; Kr = c->Kr[6]; QBAR (block, Kr, Km);
- Km = c->Km[7]; Kr = c->Kr[7]; QBAR (block, Kr, Km);
- Km = c->Km[8]; Kr = c->Kr[8]; QBAR (block, Kr, Km);
- Km = c->Km[9]; Kr = c->Kr[9]; QBAR (block, Kr, Km);
- Km = c->Km[10]; Kr = c->Kr[10]; QBAR (block, Kr, Km);
- Km = c->Km[11]; Kr = c->Kr[11]; QBAR (block, Kr, Km);
+ Km = c->Km[0]; Kr = c->Kr[0]; Q(block, Kr, Km);
+ Km = c->Km[1]; Kr = c->Kr[1]; Q(block, Kr, Km);
+ Km = c->Km[2]; Kr = c->Kr[2]; Q(block, Kr, Km);
+ Km = c->Km[3]; Kr = c->Kr[3]; Q(block, Kr, Km);
+ Km = c->Km[4]; Kr = c->Kr[4]; Q(block, Kr, Km);
+ Km = c->Km[5]; Kr = c->Kr[5]; Q(block, Kr, Km);
+ Km = c->Km[6]; Kr = c->Kr[6]; QBAR(block, Kr, Km);
+ Km = c->Km[7]; Kr = c->Kr[7]; QBAR(block, Kr, Km);
+ Km = c->Km[8]; Kr = c->Kr[8]; QBAR(block, Kr, Km);
+ Km = c->Km[9]; Kr = c->Kr[9]; QBAR(block, Kr, Km);
+ Km = c->Km[10]; Kr = c->Kr[10]; QBAR(block, Kr, Km);
+ Km = c->Km[11]; Kr = c->Kr[11]; QBAR(block, Kr, Km);
dst[0] = cpu_to_be32(block[0]);
dst[1] = cpu_to_be32(block[1]);
dst[2] = cpu_to_be32(block[2]);
dst[3] = cpu_to_be32(block[3]);
-}
+}
-static void cast6_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf) {
- struct cast6_ctx * c = crypto_tfm_ctx(tfm);
+static void cast6_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
+{
+ struct cast6_ctx *c = crypto_tfm_ctx(tfm);
const __be32 *src = (const __be32 *)inbuf;
__be32 *dst = (__be32 *)outbuf;
u32 block[4];
- u32 * Km;
- u8 * Kr;
+ u32 *Km;
+ u8 *Kr;
block[0] = be32_to_cpu(src[0]);
block[1] = be32_to_cpu(src[1]);
block[2] = be32_to_cpu(src[2]);
block[3] = be32_to_cpu(src[3]);
- Km = c->Km[11]; Kr = c->Kr[11]; Q (block, Kr, Km);
- Km = c->Km[10]; Kr = c->Kr[10]; Q (block, Kr, Km);
- Km = c->Km[9]; Kr = c->Kr[9]; Q (block, Kr, Km);
- Km = c->Km[8]; Kr = c->Kr[8]; Q (block, Kr, Km);
- Km = c->Km[7]; Kr = c->Kr[7]; Q (block, Kr, Km);
- Km = c->Km[6]; Kr = c->Kr[6]; Q (block, Kr, Km);
- Km = c->Km[5]; Kr = c->Kr[5]; QBAR (block, Kr, Km);
- Km = c->Km[4]; Kr = c->Kr[4]; QBAR (block, Kr, Km);
- Km = c->Km[3]; Kr = c->Kr[3]; QBAR (block, Kr, Km);
- Km = c->Km[2]; Kr = c->Kr[2]; QBAR (block, Kr, Km);
- Km = c->Km[1]; Kr = c->Kr[1]; QBAR (block, Kr, Km);
- Km = c->Km[0]; Kr = c->Kr[0]; QBAR (block, Kr, Km);
-
+ Km = c->Km[11]; Kr = c->Kr[11]; Q(block, Kr, Km);
+ Km = c->Km[10]; Kr = c->Kr[10]; Q(block, Kr, Km);
+ Km = c->Km[9]; Kr = c->Kr[9]; Q(block, Kr, Km);
+ Km = c->Km[8]; Kr = c->Kr[8]; Q(block, Kr, Km);
+ Km = c->Km[7]; Kr = c->Kr[7]; Q(block, Kr, Km);
+ Km = c->Km[6]; Kr = c->Kr[6]; Q(block, Kr, Km);
+ Km = c->Km[5]; Kr = c->Kr[5]; QBAR(block, Kr, Km);
+ Km = c->Km[4]; Kr = c->Kr[4]; QBAR(block, Kr, Km);
+ Km = c->Km[3]; Kr = c->Kr[3]; QBAR(block, Kr, Km);
+ Km = c->Km[2]; Kr = c->Kr[2]; QBAR(block, Kr, Km);
+ Km = c->Km[1]; Kr = c->Kr[1]; QBAR(block, Kr, Km);
+ Km = c->Km[0]; Kr = c->Kr[0]; QBAR(block, Kr, Km);
+
dst[0] = cpu_to_be32(block[0]);
dst[1] = cpu_to_be32(block[1]);
dst[2] = cpu_to_be32(block[2]);
dst[3] = cpu_to_be32(block[3]);
-}
+}
static struct crypto_alg alg = {
.cra_name = "cast6",
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