/*************************************************
* SHA-{384,512} Source File                      *
* (C) 1999-2007 Jack Lloyd                       *
*************************************************/

#include <botan/sha_64.h>
#include <botan/loadstor.h>
#include <botan/bit_ops.h>

namespace Botan {

namespace {

/*************************************************
* SHA-{384,512} Rho Function                     *
*************************************************/
inline u64bit rho(u64bit X, u32bit rot1, u32bit rot2, u32bit rot3)
   {
   return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^
           rotate_right(X, rot3));
   }

/*************************************************
* SHA-{384,512} F1 Function                      *
*************************************************/
inline void F1(u64bit A, u64bit B, u64bit C, u64bit& D,
               u64bit E, u64bit F, u64bit G, u64bit& H,
               u64bit msg, u64bit magic)
   {
   magic += rho(E, 14, 18, 41) + ((E & F) ^ (~E & G)) + msg;
   D += magic + H;
   H += magic + rho(A, 28, 34, 39) + ((A & B) ^ (A & C) ^ (B & C));
   }

/*************************************************
* SHA-{384,512} Sigma Function                   *
*************************************************/
inline u64bit sigma(u64bit X, u32bit rot1, u32bit rot2, u32bit shift)
   {
   return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ (X >> shift));
   }

}

/*************************************************
* SHA-{384,512} Compression Function             *
*************************************************/
void SHA_64_BASE::hash(const byte input[])
   {
   for(u32bit j = 0; j != 16; ++j)
      W[j] = load_be<u64bit>(input, j);

   for(u32bit j = 16; j != 80; ++j)
      W[j] = sigma(W[j- 2], 19, 61,  6) + W[j- 7] +
             sigma(W[j-15],  1,  8,  7) + W[j-16];

   u64bit A = digest[0], B = digest[1], C = digest[2],
          D = digest[3], E = digest[4], F = digest[5],
          G = digest[6], H = digest[7];

   F1(A,B,C,D,E,F,G,H,W[ 0],0x428A2F98D728AE22);
   F1(H,A,B,C,D,E,F,G,W[ 1],0x7137449123EF65CD);
   F1(G,H,A,B,C,D,E,F,W[ 2],0xB5C0FBCFEC4D3B2F);
   F1(F,G,H,A,B,C,D,E,W[ 3],0xE9B5DBA58189DBBC);
   F1(E,F,G,H,A,B,C,D,W[ 4],0x3956C25BF348B538);
   F1(D,E,F,G,H,A,B,C,W[ 5],0x59F111F1B605D019);
   F1(C,D,E,F,G,H,A,B,W[ 6],0x923F82A4AF194F9B);
   F1(B,C,D,E,F,G,H,A,W[ 7],0xAB1C5ED5DA6D8118);
   F1(A,B,C,D,E,F,G,H,W[ 8],0xD807AA98A3030242);
   F1(H,A,B,C,D,E,F,G,W[ 9],0x12835B0145706FBE);
   F1(G,H,A,B,C,D,E,F,W[10],0x243185BE4EE4B28C);
   F1(F,G,H,A,B,C,D,E,W[11],0x550C7DC3D5FFB4E2);
   F1(E,F,G,H,A,B,C,D,W[12],0x72BE5D74F27B896F);
   F1(D,E,F,G,H,A,B,C,W[13],0x80DEB1FE3B1696B1);
   F1(C,D,E,F,G,H,A,B,W[14],0x9BDC06A725C71235);
   F1(B,C,D,E,F,G,H,A,W[15],0xC19BF174CF692694);
   F1(A,B,C,D,E,F,G,H,W[16],0xE49B69C19EF14AD2);
   F1(H,A,B,C,D,E,F,G,W[17],0xEFBE4786384F25E3);
   F1(G,H,A,B,C,D,E,F,W[18],0x0FC19DC68B8CD5B5);
   F1(F,G,H,A,B,C,D,E,W[19],0x240CA1CC77AC9C65);
   F1(E,F,G,H,A,B,C,D,W[20],0x2DE92C6F592B0275);
   F1(D,E,F,G,H,A,B,C,W[21],0x4A7484AA6EA6E483);
   F1(C,D,E,F,G,H,A,B,W[22],0x5CB0A9DCBD41FBD4);
   F1(B,C,D,E,F,G,H,A,W[23],0x76F988DA831153B5);
   F1(A,B,C,D,E,F,G,H,W[24],0x983E5152EE66DFAB);
   F1(H,A,B,C,D,E,F,G,W[25],0xA831C66D2DB43210);
   F1(G,H,A,B,C,D,E,F,W[26],0xB00327C898FB213F);
   F1(F,G,H,A,B,C,D,E,W[27],0xBF597FC7BEEF0EE4);
   F1(E,F,G,H,A,B,C,D,W[28],0xC6E00BF33DA88FC2);
   F1(D,E,F,G,H,A,B,C,W[29],0xD5A79147930AA725);
   F1(C,D,E,F,G,H,A,B,W[30],0x06CA6351E003826F);
   F1(B,C,D,E,F,G,H,A,W[31],0x142929670A0E6E70);
   F1(A,B,C,D,E,F,G,H,W[32],0x27B70A8546D22FFC);
   F1(H,A,B,C,D,E,F,G,W[33],0x2E1B21385C26C926);
   F1(G,H,A,B,C,D,E,F,W[34],0x4D2C6DFC5AC42AED);
   F1(F,G,H,A,B,C,D,E,W[35],0x53380D139D95B3DF);
   F1(E,F,G,H,A,B,C,D,W[36],0x650A73548BAF63DE);
   F1(D,E,F,G,H,A,B,C,W[37],0x766A0ABB3C77B2A8);
   F1(C,D,E,F,G,H,A,B,W[38],0x81C2C92E47EDAEE6);
   F1(B,C,D,E,F,G,H,A,W[39],0x92722C851482353B);
   F1(A,B,C,D,E,F,G,H,W[40],0xA2BFE8A14CF10364);
   F1(H,A,B,C,D,E,F,G,W[41],0xA81A664BBC423001);
   F1(G,H,A,B,C,D,E,F,W[42],0xC24B8B70D0F89791);
   F1(F,G,H,A,B,C,D,E,W[43],0xC76C51A30654BE30);
   F1(E,F,G,H,A,B,C,D,W[44],0xD192E819D6EF5218);
   F1(D,E,F,G,H,A,B,C,W[45],0xD69906245565A910);
   F1(C,D,E,F,G,H,A,B,W[46],0xF40E35855771202A);
   F1(B,C,D,E,F,G,H,A,W[47],0x106AA07032BBD1B8);
   F1(A,B,C,D,E,F,G,H,W[48],0x19A4C116B8D2D0C8);
   F1(H,A,B,C,D,E,F,G,W[49],0x1E376C085141AB53);
   F1(G,H,A,B,C,D,E,F,W[50],0x2748774CDF8EEB99);
   F1(F,G,H,A,B,C,D,E,W[51],0x34B0BCB5E19B48A8);
   F1(E,F,G,H,A,B,C,D,W[52],0x391C0CB3C5C95A63);
   F1(D,E,F,G,H,A,B,C,W[53],0x4ED8AA4AE3418ACB);
   F1(C,D,E,F,G,H,A,B,W[54],0x5B9CCA4F7763E373);
   F1(B,C,D,E,F,G,H,A,W[55],0x682E6FF3D6B2B8A3);
   F1(A,B,C,D,E,F,G,H,W[56],0x748F82EE5DEFB2FC);
   F1(H,A,B,C,D,E,F,G,W[57],0x78A5636F43172F60);
   F1(G,H,A,B,C,D,E,F,W[58],0x84C87814A1F0AB72);
   F1(F,G,H,A,B,C,D,E,W[59],0x8CC702081A6439EC);
   F1(E,F,G,H,A,B,C,D,W[60],0x90BEFFFA23631E28);
   F1(D,E,F,G,H,A,B,C,W[61],0xA4506CEBDE82BDE9);
   F1(C,D,E,F,G,H,A,B,W[62],0xBEF9A3F7B2C67915);
   F1(B,C,D,E,F,G,H,A,W[63],0xC67178F2E372532B);
   F1(A,B,C,D,E,F,G,H,W[64],0xCA273ECEEA26619C);
   F1(H,A,B,C,D,E,F,G,W[65],0xD186B8C721C0C207);
   F1(G,H,A,B,C,D,E,F,W[66],0xEADA7DD6CDE0EB1E);
   F1(F,G,H,A,B,C,D,E,W[67],0xF57D4F7FEE6ED178);
   F1(E,F,G,H,A,B,C,D,W[68],0x06F067AA72176FBA);
   F1(D,E,F,G,H,A,B,C,W[69],0x0A637DC5A2C898A6);
   F1(C,D,E,F,G,H,A,B,W[70],0x113F9804BEF90DAE);
   F1(B,C,D,E,F,G,H,A,W[71],0x1B710B35131C471B);
   F1(A,B,C,D,E,F,G,H,W[72],0x28DB77F523047D84);
   F1(H,A,B,C,D,E,F,G,W[73],0x32CAAB7B40C72493);
   F1(G,H,A,B,C,D,E,F,W[74],0x3C9EBE0A15C9BEBC);
   F1(F,G,H,A,B,C,D,E,W[75],0x431D67C49C100D4C);
   F1(E,F,G,H,A,B,C,D,W[76],0x4CC5D4BECB3E42B6);
   F1(D,E,F,G,H,A,B,C,W[77],0x597F299CFC657E2A);
   F1(C,D,E,F,G,H,A,B,W[78],0x5FCB6FAB3AD6FAEC);
   F1(B,C,D,E,F,G,H,A,W[79],0x6C44198C4A475817);

   digest[0] += A; digest[1] += B; digest[2] += C;
   digest[3] += D; digest[4] += E; digest[5] += F;
   digest[6] += G; digest[7] += H;
   }

/*************************************************
* Copy out the digest                            *
*************************************************/
void SHA_64_BASE::copy_out(byte output[])
   {
   for(u32bit j = 0; j != OUTPUT_LENGTH; j += 8)
      store_be(digest[j/8], output + j);
   }

/*************************************************
* Clear memory of sensitive data                 *
*************************************************/
void SHA_64_BASE::clear() throw()
   {
   MDx_HashFunction::clear();
   W.clear();
   }

/*************************************************
* Clear memory of sensitive data                 *
*************************************************/
void SHA_384::clear() throw()
   {
   SHA_64_BASE::clear();
   digest[0] = 0xCBBB9D5DC1059ED8;
   digest[1] = 0x629A292A367CD507;
   digest[2] = 0x9159015A3070DD17;
   digest[3] = 0x152FECD8F70E5939;
   digest[4] = 0x67332667FFC00B31;
   digest[5] = 0x8EB44A8768581511;
   digest[6] = 0xDB0C2E0D64F98FA7;
   digest[7] = 0x47B5481DBEFA4FA4;
   }

/*************************************************
* Clear memory of sensitive data                 *
*************************************************/
void SHA_512::clear() throw()
   {
   SHA_64_BASE::clear();
   digest[0] = 0x6A09E667F3BCC908;
   digest[1] = 0xBB67AE8584CAA73B;
   digest[2] = 0x3C6EF372FE94F82B;
   digest[3] = 0xA54FF53A5F1D36F1;
   digest[4] = 0x510E527FADE682D1;
   digest[5] = 0x9B05688C2B3E6C1F;
   digest[6] = 0x1F83D9ABFB41BD6B;
   digest[7] = 0x5BE0CD19137E2179;
   }

}