crypto: sha512 - Use binary and instead of modulus

[pandora-kernel.git] / crypto / sha512_generic.c

diff --git a/crypto/sha512_generic.c b/crypto/sha512_generic.c
index 9ed9f60..3edebfd 100644 (file)
--- a/crypto/sha512_generic.c
+++ b/crypto/sha512_generic.c
@@ -21,8 +21,6 @@
 #include <linux/percpu.h>
 #include <asm/byteorder.h>
 
-static DEFINE_PER_CPU(u64[80], msg_schedule);
-
 static inline u64 Ch(u64 x, u64 y, u64 z)
 {
         return z ^ (x & (y ^ z));
@@ -80,7 +78,7 @@ static inline void LOAD_OP(int I, u64 *W, const u8 *input)
 
 static inline void BLEND_OP(int I, u64 *W)
 {
-       W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
+       W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
 }
 
 static void
@@ -89,38 +87,48 @@ sha512_transform(u64 *state, const u8 *input)
        u64 a, b, c, d, e, f, g, h, t1, t2;
 
        int i;
-       u64 *W = get_cpu_var(msg_schedule);
+       u64 W[16];
 
        /* load the input */
         for (i = 0; i < 16; i++)
                 LOAD_OP(i, W, input);
 
-        for (i = 16; i < 80; i++) {
-                BLEND_OP(i, W);
-        }
-
        /* load the state into our registers */
        a=state[0];   b=state[1];   c=state[2];   d=state[3];
        e=state[4];   f=state[5];   g=state[6];   h=state[7];
 
-       /* now iterate */
-       for (i=0; i<80; i+=8) {
-               t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[i  ];
-               t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
-               t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1];
-               t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
-               t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2];
-               t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
-               t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3];
-               t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
-               t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4];
-               t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
-               t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5];
-               t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
-               t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6];
-               t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
-               t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7];
-               t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;
+#define SHA512_0_15(i, a, b, c, d, e, f, g, h)                 \
+       t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[i];      \
+       t2 = e0(a) + Maj(a, b, c);                              \
+       d += t1;                                                \
+       h = t1 + t2
+
+#define SHA512_16_79(i, a, b, c, d, e, f, g, h)                        \
+       BLEND_OP(i, W);                                         \
+       t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[(i)&15]; \
+       t2 = e0(a) + Maj(a, b, c);                              \
+       d += t1;                                                \
+       h = t1 + t2
+
+       for (i = 0; i < 16; i += 8) {
+               SHA512_0_15(i, a, b, c, d, e, f, g, h);
+               SHA512_0_15(i + 1, h, a, b, c, d, e, f, g);
+               SHA512_0_15(i + 2, g, h, a, b, c, d, e, f);
+               SHA512_0_15(i + 3, f, g, h, a, b, c, d, e);
+               SHA512_0_15(i + 4, e, f, g, h, a, b, c, d);
+               SHA512_0_15(i + 5, d, e, f, g, h, a, b, c);
+               SHA512_0_15(i + 6, c, d, e, f, g, h, a, b);
+               SHA512_0_15(i + 7, b, c, d, e, f, g, h, a);
+       }
+       for (i = 16; i < 80; i += 8) {
+               SHA512_16_79(i, a, b, c, d, e, f, g, h);
+               SHA512_16_79(i + 1, h, a, b, c, d, e, f, g);
+               SHA512_16_79(i + 2, g, h, a, b, c, d, e, f);
+               SHA512_16_79(i + 3, f, g, h, a, b, c, d, e);
+               SHA512_16_79(i + 4, e, f, g, h, a, b, c, d);
+               SHA512_16_79(i + 5, d, e, f, g, h, a, b, c);
+               SHA512_16_79(i + 6, c, d, e, f, g, h, a, b);
+               SHA512_16_79(i + 7, b, c, d, e, f, g, h, a);
        }
 
        state[0] += a; state[1] += b; state[2] += c; state[3] += d;
@@ -128,8 +136,6 @@ sha512_transform(u64 *state, const u8 *input)
 
        /* erase our data */
        a = b = c = d = e = f = g = h = t1 = t2 = 0;
-       memset(W, 0, sizeof(__get_cpu_var(msg_schedule)));
-       put_cpu_var(msg_schedule);
 }
 
 static int