1 files changed, 212 insertions, 0 deletions

diff --git a/nacl/crypto_hashblocks/sha256/ref/blocks.c b/nacl/crypto_hashblocks/sha256/ref/blocks.c
new file mode 100644
index 00000000..ad977945
--- /dev/null
+++ b/nacl/crypto_hashblocks/sha256/ref/blocks.c
@@ -0,0 +1,212 @@
+#include "crypto_hashblocks.h"
+
+typedef unsigned int uint32;
+
+static uint32 load_bigendian(const unsigned char *x)
+{
+  return
+      (uint32) (x[3]) \
+  | (((uint32) (x[2])) << 8) \
+  | (((uint32) (x[1])) << 16) \
+  | (((uint32) (x[0])) << 24)
+  ;
+}
+
+static void store_bigendian(unsigned char *x,uint32 u)
+{
+  x[3] = u; u >>= 8;
+  x[2] = u; u >>= 8;
+  x[1] = u; u >>= 8;
+  x[0] = u;
+}
+
+#define SHR(x,c) ((x) >> (c))
+#define ROTR(x,c) (((x) >> (c)) | ((x) << (32 - (c))))
+
+#define Ch(x,y,z) ((x & y) ^ (~x & z))
+#define Maj(x,y,z) ((x & y) ^ (x & z) ^ (y & z))
+#define Sigma0(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
+#define Sigma1(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
+#define sigma0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
+#define sigma1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
+
+#define M(w0,w14,w9,w1) w0 = sigma1(w14) + w9 + sigma0(w1) + w0;
+
+#define EXPAND \
+  M(w0 ,w14,w9 ,w1 ) \
+  M(w1 ,w15,w10,w2 ) \
+  M(w2 ,w0 ,w11,w3 ) \
+  M(w3 ,w1 ,w12,w4 ) \
+  M(w4 ,w2 ,w13,w5 ) \
+  M(w5 ,w3 ,w14,w6 ) \
+  M(w6 ,w4 ,w15,w7 ) \
+  M(w7 ,w5 ,w0 ,w8 ) \
+  M(w8 ,w6 ,w1 ,w9 ) \
+  M(w9 ,w7 ,w2 ,w10) \
+  M(w10,w8 ,w3 ,w11) \
+  M(w11,w9 ,w4 ,w12) \
+  M(w12,w10,w5 ,w13) \
+  M(w13,w11,w6 ,w14) \
+  M(w14,w12,w7 ,w15) \
+  M(w15,w13,w8 ,w0 )
+
+#define F(w,k) \
+  T1 = h + Sigma1(e) + Ch(e,f,g) + k + w; \
+  T2 = Sigma0(a) + Maj(a,b,c); \
+  h = g; \
+  g = f; \
+  f = e; \
+  e = d + T1; \
+  d = c; \
+  c = b; \
+  b = a; \
+  a = T1 + T2;
+
+int crypto_hashblocks(unsigned char *statebytes,const unsigned char *in,unsigned long long inlen)
+{
+  uint32 state[8];
+  uint32 a;
+  uint32 b;
+  uint32 c;
+  uint32 d;
+  uint32 e;
+  uint32 f;
+  uint32 g;
+  uint32 h;
+  uint32 T1;
+  uint32 T2;
+
+  a = load_bigendian(statebytes +  0); state[0] = a;
+  b = load_bigendian(statebytes +  4); state[1] = b;
+  c = load_bigendian(statebytes +  8); state[2] = c;
+  d = load_bigendian(statebytes + 12); state[3] = d;
+  e = load_bigendian(statebytes + 16); state[4] = e;
+  f = load_bigendian(statebytes + 20); state[5] = f;
+  g = load_bigendian(statebytes + 24); state[6] = g;
+  h = load_bigendian(statebytes + 28); state[7] = h;
+
+  while (inlen >= 64) {
+    uint32 w0  = load_bigendian(in +  0);
+    uint32 w1  = load_bigendian(in +  4);
+    uint32 w2  = load_bigendian(in +  8);
+    uint32 w3  = load_bigendian(in + 12);
+    uint32 w4  = load_bigendian(in + 16);
+    uint32 w5  = load_bigendian(in + 20);
+    uint32 w6  = load_bigendian(in + 24);
+    uint32 w7  = load_bigendian(in + 28);
+    uint32 w8  = load_bigendian(in + 32);
+    uint32 w9  = load_bigendian(in + 36);
+    uint32 w10 = load_bigendian(in + 40);
+    uint32 w11 = load_bigendian(in + 44);
+    uint32 w12 = load_bigendian(in + 48);
+    uint32 w13 = load_bigendian(in + 52);
+    uint32 w14 = load_bigendian(in + 56);
+    uint32 w15 = load_bigendian(in + 60);
+
+    F(w0 ,0x428a2f98)
+    F(w1 ,0x71374491)
+    F(w2 ,0xb5c0fbcf)
+    F(w3 ,0xe9b5dba5)
+    F(w4 ,0x3956c25b)
+    F(w5 ,0x59f111f1)
+    F(w6 ,0x923f82a4)
+    F(w7 ,0xab1c5ed5)
+    F(w8 ,0xd807aa98)
+    F(w9 ,0x12835b01)
+    F(w10,0x243185be)
+    F(w11,0x550c7dc3)
+    F(w12,0x72be5d74)
+    F(w13,0x80deb1fe)
+    F(w14,0x9bdc06a7)
+    F(w15,0xc19bf174)
+
+    EXPAND
+
+    F(w0 ,0xe49b69c1)
+    F(w1 ,0xefbe4786)
+    F(w2 ,0x0fc19dc6)
+    F(w3 ,0x240ca1cc)
+    F(w4 ,0x2de92c6f)
+    F(w5 ,0x4a7484aa)
+    F(w6 ,0x5cb0a9dc)
+    F(w7 ,0x76f988da)
+    F(w8 ,0x983e5152)
+    F(w9 ,0xa831c66d)
+    F(w10,0xb00327c8)
+    F(w11,0xbf597fc7)
+    F(w12,0xc6e00bf3)
+    F(w13,0xd5a79147)
+    F(w14,0x06ca6351)
+    F(w15,0x14292967)
+
+    EXPAND
+
+    F(w0 ,0x27b70a85)
+    F(w1 ,0x2e1b2138)
+    F(w2 ,0x4d2c6dfc)
+    F(w3 ,0x53380d13)
+    F(w4 ,0x650a7354)
+    F(w5 ,0x766a0abb)
+    F(w6 ,0x81c2c92e)
+    F(w7 ,0x92722c85)
+    F(w8 ,0xa2bfe8a1)
+    F(w9 ,0xa81a664b)
+    F(w10,0xc24b8b70)
+    F(w11,0xc76c51a3)
+    F(w12,0xd192e819)
+    F(w13,0xd6990624)
+    F(w14,0xf40e3585)
+    F(w15,0x106aa070)
+
+    EXPAND
+
+    F(w0 ,0x19a4c116)
+    F(w1 ,0x1e376c08)
+    F(w2 ,0x2748774c)
+    F(w3 ,0x34b0bcb5)
+    F(w4 ,0x391c0cb3)
+    F(w5 ,0x4ed8aa4a)
+    F(w6 ,0x5b9cca4f)
+    F(w7 ,0x682e6ff3)
+    F(w8 ,0x748f82ee)
+    F(w9 ,0x78a5636f)
+    F(w10,0x84c87814)
+    F(w11,0x8cc70208)
+    F(w12,0x90befffa)
+    F(w13,0xa4506ceb)
+    F(w14,0xbef9a3f7)
+    F(w15,0xc67178f2)
+
+    a += state[0];
+    b += state[1];
+    c += state[2];
+    d += state[3];
+    e += state[4];
+    f += state[5];
+    g += state[6];
+    h += state[7];
+  
+    state[0] = a;
+    state[1] = b;
+    state[2] = c;
+    state[3] = d;
+    state[4] = e;
+    state[5] = f;
+    state[6] = g;
+    state[7] = h;
+
+    in += 64;
+    inlen -= 64;
+  }
+
+  store_bigendian(statebytes +  0,state[0]);
+  store_bigendian(statebytes +  4,state[1]);
+  store_bigendian(statebytes +  8,state[2]);
+  store_bigendian(statebytes + 12,state[3]);
+  store_bigendian(statebytes + 16,state[4]);
+  store_bigendian(statebytes + 20,state[5]);
+  store_bigendian(statebytes + 24,state[6]);
+  store_bigendian(statebytes + 28,state[7]);
+
+  return 0;
+}