dlls/bcrypt/sha512.c

   1 /*
   2  * Copyright 2016 Michael Müller
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  *
  18  */
  19
  20 /* Based on public domain implementation from
  21    https://git.musl-libc.org/cgit/musl/tree/src/crypt/crypt_sha512.c */
  22
  23 #include "bcrypt_internal.h"
  24
  25 static ULONG64 ror(ULONG64 n, int k) { return (n >> k) | (n << (64-k)); }
  26 #define Ch(x,y,z)  (z ^ (x & (y ^ z)))
  27 #define Maj(x,y,z) ((x & y) | (z & (x | y)))
  28 #define S0(x)      (ror(x,28) ^ ror(x,34) ^ ror(x,39))
  29 #define S1(x)      (ror(x,14) ^ ror(x,18) ^ ror(x,41))
  30 #define R0(x)      (ror(x,1) ^ ror(x,8) ^ (x>>7))
  31 #define R1(x)      (ror(x,19) ^ ror(x,61) ^ (x>>6))
  32 #define ULL(a,b)   (((ULONG64)(a) << 32) | (b))
  33
  34 static const ULONG64 K[80] =
  35 {
  36     ULL(0x428a2f98,0xd728ae22), ULL(0x71374491,0x23ef65cd), ULL(0xb5c0fbcf,0xec4d3b2f), ULL(0xe9b5dba5,0x8189dbbc),
  37     ULL(0x3956c25b,0xf348b538), ULL(0x59f111f1,0xb605d019), ULL(0x923f82a4,0xaf194f9b), ULL(0xab1c5ed5,0xda6d8118),
  38     ULL(0xd807aa98,0xa3030242), ULL(0x12835b01,0x45706fbe), ULL(0x243185be,0x4ee4b28c), ULL(0x550c7dc3,0xd5ffb4e2),
  39     ULL(0x72be5d74,0xf27b896f), ULL(0x80deb1fe,0x3b1696b1), ULL(0x9bdc06a7,0x25c71235), ULL(0xc19bf174,0xcf692694),
  40     ULL(0xe49b69c1,0x9ef14ad2), ULL(0xefbe4786,0x384f25e3), ULL(0x0fc19dc6,0x8b8cd5b5), ULL(0x240ca1cc,0x77ac9c65),
  41     ULL(0x2de92c6f,0x592b0275), ULL(0x4a7484aa,0x6ea6e483), ULL(0x5cb0a9dc,0xbd41fbd4), ULL(0x76f988da,0x831153b5),
  42     ULL(0x983e5152,0xee66dfab), ULL(0xa831c66d,0x2db43210), ULL(0xb00327c8,0x98fb213f), ULL(0xbf597fc7,0xbeef0ee4),
  43     ULL(0xc6e00bf3,0x3da88fc2), ULL(0xd5a79147,0x930aa725), ULL(0x06ca6351,0xe003826f), ULL(0x14292967,0x0a0e6e70),
  44     ULL(0x27b70a85,0x46d22ffc), ULL(0x2e1b2138,0x5c26c926), ULL(0x4d2c6dfc,0x5ac42aed), ULL(0x53380d13,0x9d95b3df),
  45     ULL(0x650a7354,0x8baf63de), ULL(0x766a0abb,0x3c77b2a8), ULL(0x81c2c92e,0x47edaee6), ULL(0x92722c85,0x1482353b),
  46     ULL(0xa2bfe8a1,0x4cf10364), ULL(0xa81a664b,0xbc423001), ULL(0xc24b8b70,0xd0f89791), ULL(0xc76c51a3,0x0654be30),
  47     ULL(0xd192e819,0xd6ef5218), ULL(0xd6990624,0x5565a910), ULL(0xf40e3585,0x5771202a), ULL(0x106aa070,0x32bbd1b8),
  48     ULL(0x19a4c116,0xb8d2d0c8), ULL(0x1e376c08,0x5141ab53), ULL(0x2748774c,0xdf8eeb99), ULL(0x34b0bcb5,0xe19b48a8),
  49     ULL(0x391c0cb3,0xc5c95a63), ULL(0x4ed8aa4a,0xe3418acb), ULL(0x5b9cca4f,0x7763e373), ULL(0x682e6ff3,0xd6b2b8a3),
  50     ULL(0x748f82ee,0x5defb2fc), ULL(0x78a5636f,0x43172f60), ULL(0x84c87814,0xa1f0ab72), ULL(0x8cc70208,0x1a6439ec),
  51     ULL(0x90befffa,0x23631e28), ULL(0xa4506ceb,0xde82bde9), ULL(0xbef9a3f7,0xb2c67915), ULL(0xc67178f2,0xe372532b),
  52     ULL(0xca273ece,0xea26619c), ULL(0xd186b8c7,0x21c0c207), ULL(0xeada7dd6,0xcde0eb1e), ULL(0xf57d4f7f,0xee6ed178),
  53     ULL(0x06f067aa,0x72176fba), ULL(0x0a637dc5,0xa2c898a6), ULL(0x113f9804,0xbef90dae), ULL(0x1b710b35,0x131c471b),
  54     ULL(0x28db77f5,0x23047d84), ULL(0x32caab7b,0x40c72493), ULL(0x3c9ebe0a,0x15c9bebc), ULL(0x431d67c4,0x9c100d4c),
  55     ULL(0x4cc5d4be,0xcb3e42b6), ULL(0x597f299c,0xfc657e2a), ULL(0x5fcb6fab,0x3ad6faec), ULL(0x6c44198c,0x4a475817)
  56 };
  57
  58 static void processblock(SHA512_CTX *ctx, const UCHAR *buffer)
  59 {
  60     ULONG64 W[80], t1, t2, a, b, c, d, e, f, g, h;
  61     int i;
  62
  63     for (i = 0; i < 16; i++)
  64     {
  65         W[i]  = (ULONG64)buffer[8*i]<<56;
  66         W[i] |= (ULONG64)buffer[8*i+1]<<48;
  67         W[i] |= (ULONG64)buffer[8*i+2]<<40;
  68         W[i] |= (ULONG64)buffer[8*i+3]<<32;
  69         W[i] |= (ULONG64)buffer[8*i+4]<<24;
  70         W[i] |= (ULONG64)buffer[8*i+5]<<16;
  71         W[i] |= (ULONG64)buffer[8*i+6]<<8;
  72         W[i] |= buffer[8*i+7];
  73     }
  74
  75     for (; i < 80; i++)
  76         W[i] = R1(W[i-2]) + W[i-7] + R0(W[i-15]) + W[i-16];
  77
  78     a = ctx->h[0];
  79     b = ctx->h[1];
  80     c = ctx->h[2];
  81     d = ctx->h[3];
  82     e = ctx->h[4];
  83     f = ctx->h[5];
  84     g = ctx->h[6];
  85     h = ctx->h[7];
  86
  87     for (i = 0; i < 80; i++)
  88     {
  89         t1 = h + S1(e) + Ch(e,f,g) + K[i] + W[i];
  90         t2 = S0(a) + Maj(a,b,c);
  91         h = g;
  92         g = f;
  93         f = e;
  94         e = d + t1;
  95         d = c;
  96         c = b;
  97         b = a;
  98         a = t1 + t2;
  99     }
 100
 101     ctx->h[0] += a;
 102     ctx->h[1] += b;
 103     ctx->h[2] += c;
 104     ctx->h[3] += d;
 105     ctx->h[4] += e;
 106     ctx->h[5] += f;
 107     ctx->h[6] += g;
 108     ctx->h[7] += h;
 109 }
 110
 111 static void pad(SHA512_CTX *ctx)
 112 {
 113     ULONG64 r = ctx->len % 128;
 114
 115     ctx->buf[r++] = 0x80;
 116     if (r > 112)
 117     {
 118         memset(ctx->buf + r, 0, 128 - r);
 119         r = 0;
 120         processblock(ctx, ctx->buf);
 121     }
 122
 123     memset(ctx->buf + r, 0, 120 - r);
 124     ctx->len *= 8;
 125     ctx->buf[120] = ctx->len >> 56;
 126     ctx->buf[121] = ctx->len >> 48;
 127     ctx->buf[122] = ctx->len >> 40;
 128     ctx->buf[123] = ctx->len >> 32;
 129     ctx->buf[124] = ctx->len >> 24;
 130     ctx->buf[125] = ctx->len >> 16;
 131     ctx->buf[126] = ctx->len >> 8;
 132     ctx->buf[127] = ctx->len;
 133
 134     processblock(ctx, ctx->buf);
 135 }
 136
 137 void sha512_init(SHA512_CTX *ctx)
 138 {
 139     ctx->len = 0;
 140     ctx->h[0] = ULL(0x6a09e667,0xf3bcc908);
 141     ctx->h[1] = ULL(0xbb67ae85,0x84caa73b);
 142     ctx->h[2] = ULL(0x3c6ef372,0xfe94f82b);
 143     ctx->h[3] = ULL(0xa54ff53a,0x5f1d36f1);
 144     ctx->h[4] = ULL(0x510e527f,0xade682d1);
 145     ctx->h[5] = ULL(0x9b05688c,0x2b3e6c1f);
 146     ctx->h[6] = ULL(0x1f83d9ab,0xfb41bd6b);
 147     ctx->h[7] = ULL(0x5be0cd19,0x137e2179);
 148 }
 149
 150 void sha512_update(SHA512_CTX *ctx, const UCHAR *buffer, ULONG len)
 151 {
 152     const UCHAR *p = buffer;
 153     unsigned r = ctx->len % 128;
 154
 155     ctx->len += len;
 156     if (r)
 157     {
 158         if (len < 128 - r)
 159         {
 160             memcpy(ctx->buf + r, p, len);
 161             return;
 162         }
 163         memcpy(ctx->buf + r, p, 128 - r);
 164         len -= 128 - r;
 165         p += 128 - r;
 166         processblock(ctx, ctx->buf);
 167     }
 168
 169     for (; len >= 128; len -= 128, p += 128)
 170         processblock(ctx, p);
 171
 172     memcpy(ctx->buf, p, len);
 173 }
 174
 175 void sha512_finalize(SHA512_CTX *ctx, UCHAR *buffer)
 176 {
 177     int i;
 178
 179     pad(ctx);
 180     for (i = 0; i < 8; i++)
 181     {
 182         buffer[8*i] = ctx->h[i] >> 56;
 183         buffer[8*i+1] = ctx->h[i] >> 48;
 184         buffer[8*i+2] = ctx->h[i] >> 40;
 185         buffer[8*i+3] = ctx->h[i] >> 32;
 186         buffer[8*i+4] = ctx->h[i] >> 24;
 187         buffer[8*i+5] = ctx->h[i] >> 16;
 188         buffer[8*i+6] = ctx->h[i] >> 8;
 189         buffer[8*i+7] = ctx->h[i];
 190     }
 191 }
 192
 193 void sha384_init(SHA512_CTX *ctx)
 194 {
 195     ctx->len = 0;
 196     ctx->h[0] = ULL(0xcbbb9d5d,0xc1059ed8);
 197     ctx->h[1] = ULL(0x629a292a,0x367cd507);
 198     ctx->h[2] = ULL(0x9159015a,0x3070dd17);
 199     ctx->h[3] = ULL(0x152fecd8,0xf70e5939);
 200     ctx->h[4] = ULL(0x67332667,0xffc00b31);
 201     ctx->h[5] = ULL(0x8eb44a87,0x68581511);
 202     ctx->h[6] = ULL(0xdb0c2e0d,0x64f98fa7);
 203     ctx->h[7] = ULL(0x47b5481d,0xbefa4fa4);
 204 }
 205
 206 void sha384_finalize(SHA512_CTX *ctx, UCHAR *buffer)
 207 {
 208     UCHAR buffer512[64];
 209
 210     sha512_finalize(ctx, buffer512);
 211     memcpy(buffer, buffer512, 48);
 212 }