crypto/modes/gcm128.c

   1 /* ====================================================================
   2  * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  *
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this
  17  *    software must display the following acknowledgment:
  18  *    "This product includes software developed by the OpenSSL Project
  19  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  20  *
  21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  22  *    endorse or promote products derived from this software without
  23  *    prior written permission. For written permission, please contact
  24  *    openssl-core@openssl.org.
  25  *
  26  * 5. Products derived from this software may not be called "OpenSSL"
  27  *    nor may "OpenSSL" appear in their names without prior written
  28  *    permission of the OpenSSL Project.
  29  *
  30  * 6. Redistributions of any form whatsoever must retain the following
  31  *    acknowledgment:
  32  *    "This product includes software developed by the OpenSSL Project
  33  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  46  * OF THE POSSIBILITY OF SUCH DAMAGE.
  47  * ====================================================================
  48  */
  49
  50 #include "crypto.h"
  51 #include "modes_lcl.h"
  52 #include <string.h>
  53
  54 #ifndef MODES_DEBUG
  55 # ifndef NDEBUG
  56 #  define NDEBUG
  57 # endif
  58 #endif
  59 #include <assert.h>
  60
  61 typedef struct { u64 hi,lo; } u128;
  62
  63 #if defined(BSWAP4) && defined(STRICT_ALIGNMENT)
  64 /* redefine, because alignment is ensured */
  65 #undef  GETU32
  66 #define GETU32(p)       BSWAP4(*(const u32 *)(p))
  67 #undef  PUTU32
  68 #define PUTU32(p,v)     *(u32 *)(p) = BSWAP4(v)
  69 #endif
  70
  71 #define PACK(s)         ((size_t)(s)<<(sizeof(size_t)*8-16))
  72 #define REDUCE1BIT(V)   do { \
  73         if (sizeof(size_t)==8) { \
  74                 u64 T = U64(0xe100000000000000) & (0-(V.lo&1)); \
  75                 V.lo  = (V.hi<<63)|(V.lo>>1); \
  76                 V.hi  = (V.hi>>1 )^T; \
  77         } \
  78         else { \
  79                 u32 T = 0xe1000000U & (0-(u32)(V.lo&1)); \
  80                 V.lo  = (V.hi<<63)|(V.lo>>1); \
  81                 V.hi  = (V.hi>>1 )^((u64)T<<32); \
  82         } \
  83 } while(0)
  84
  85 #ifdef  TABLE_BITS
  86 #undef  TABLE_BITS
  87 #endif
  88 /*
  89  * Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
  90  * never be set to 8. 8 is effectively reserved for testing purposes.
  91  * TABLE_BITS>1 are lookup-table-driven implementations referred to as
  92  * "Shoup's" in GCM specification. In other words OpenSSL does not cover
  93  * whole spectrum of possible table driven implementations. Why? In
  94  * non-"Shoup's" case memory access pattern is segmented in such manner,
  95  * that it's trivial to see that cache timing information can reveal
  96  * fair portion of intermediate hash value. Given that ciphertext is
  97  * always available to attacker, it's possible for him to attempt to
  98  * deduce secret parameter H and if successful, tamper with messages
  99  * [which is nothing but trivial in CTR mode]. In "Shoup's" case it's
 100  * not as trivial, but there is no reason to believe that it's resistant
 101  * to cache-timing attack. And the thing about "8-bit" implementation is
 102  * that it consumes 16 (sixteen) times more memory, 4KB per individual
 103  * key + 1KB shared. Well, on pros side it should be twice as fast as
 104  * "4-bit" version. And for gcc-generated x86[_64] code, "8-bit" version
 105  * was observed to run ~75% faster, closer to 100% for commercial
 106  * compilers... Yet "4-bit" procedure is preferred, because it's
 107  * believed to provide better security-performance balance and adequate
 108  * all-round performance. "All-round" refers to things like:
 109  *
 110  * - shorter setup time effectively improves overall timing for
 111  *   handling short messages;
 112  * - larger table allocation can become unbearable because of VM
 113  *   subsystem penalties (for example on Windows large enough free
 114  *   results in VM working set trimming, meaning that consequent
 115  *   malloc would immediately incur working set expansion);
 116  * - larger table has larger cache footprint, which can affect
 117  *   performance of other code paths (not necessarily even from same
 118  *   thread in Hyper-Threading world);
 119  */
 120 #define TABLE_BITS 4
 121
 122 #if     TABLE_BITS==8
 123
 124 static void gcm_init_8bit(u128 Htable[256], u64 H[2])
 125 {
 126         int  i, j;
 127         u128 V;
 128
 129         Htable[0].hi = 0;
 130         Htable[0].lo = 0;
 131         V.hi = H[0];
 132         V.lo = H[1];
 133
 134         for (Htable[128]=V, i=64; i>0; i>>=1) {
 135                 REDUCE1BIT(V);
 136                 Htable[i] = V;
 137         }
 138
 139         for (i=2; i<256; i<<=1) {
 140                 u128 *Hi = Htable+i, H0 = *Hi;
 141                 for (j=1; j<i; ++j) {
 142                         Hi[j].hi = H0.hi^Htable[j].hi;
 143                         Hi[j].lo = H0.lo^Htable[j].lo;
 144                 }
 145         }
 146 }
 147
 148 static void gcm_gmult_8bit(u64 Xi[2], u128 Htable[256])
 149 {
 150         u128 Z = { 0, 0};
 151         const u8 *xi = (const u8 *)Xi+15;
 152         size_t rem, n = *xi;
 153         const union { long one; char little; } is_endian = {1};
 154         static const size_t rem_8bit[256] = {
 155                 PACK(0x0000), PACK(0x01C2), PACK(0x0384), PACK(0x0246),
 156                 PACK(0x0708), PACK(0x06CA), PACK(0x048C), PACK(0x054E),
 157                 PACK(0x0E10), PACK(0x0FD2), PACK(0x0D94), PACK(0x0C56),
 158                 PACK(0x0918), PACK(0x08DA), PACK(0x0A9C), PACK(0x0B5E),
 159                 PACK(0x1C20), PACK(0x1DE2), PACK(0x1FA4), PACK(0x1E66),
 160                 PACK(0x1B28), PACK(0x1AEA), PACK(0x18AC), PACK(0x196E),
 161                 PACK(0x1230), PACK(0x13F2), PACK(0x11B4), PACK(0x1076),
 162                 PACK(0x1538), PACK(0x14FA), PACK(0x16BC), PACK(0x177E),
 163                 PACK(0x3840), PACK(0x3982), PACK(0x3BC4), PACK(0x3A06),
 164                 PACK(0x3F48), PACK(0x3E8A), PACK(0x3CCC), PACK(0x3D0E),
 165                 PACK(0x3650), PACK(0x3792), PACK(0x35D4), PACK(0x3416),
 166                 PACK(0x3158), PACK(0x309A), PACK(0x32DC), PACK(0x331E),
 167                 PACK(0x2460), PACK(0x25A2), PACK(0x27E4), PACK(0x2626),
 168                 PACK(0x2368), PACK(0x22AA), PACK(0x20EC), PACK(0x212E),
 169                 PACK(0x2A70), PACK(0x2BB2), PACK(0x29F4), PACK(0x2836),
 170                 PACK(0x2D78), PACK(0x2CBA), PACK(0x2EFC), PACK(0x2F3E),
 171                 PACK(0x7080), PACK(0x7142), PACK(0x7304), PACK(0x72C6),
 172                 PACK(0x7788), PACK(0x764A), PACK(0x740C), PACK(0x75CE),
 173                 PACK(0x7E90), PACK(0x7F52), PACK(0x7D14), PACK(0x7CD6),
 174                 PACK(0x7998), PACK(0x785A), PACK(0x7A1C), PACK(0x7BDE),
 175                 PACK(0x6CA0), PACK(0x6D62), PACK(0x6F24), PACK(0x6EE6),
 176                 PACK(0x6BA8), PACK(0x6A6A), PACK(0x682C), PACK(0x69EE),
 177                 PACK(0x62B0), PACK(0x6372), PACK(0x6134), PACK(0x60F6),
 178                 PACK(0x65B8), PACK(0x647A), PACK(0x663C), PACK(0x67FE),
 179                 PACK(0x48C0), PACK(0x4902), PACK(0x4B44), PACK(0x4A86),
 180                 PACK(0x4FC8), PACK(0x4E0A), PACK(0x4C4C), PACK(0x4D8E),
 181                 PACK(0x46D0), PACK(0x4712), PACK(0x4554), PACK(0x4496),
 182                 PACK(0x41D8), PACK(0x401A), PACK(0x425C), PACK(0x439E),
 183                 PACK(0x54E0), PACK(0x5522), PACK(0x5764), PACK(0x56A6),
 184                 PACK(0x53E8), PACK(0x522A), PACK(0x506C), PACK(0x51AE),
 185                 PACK(0x5AF0), PACK(0x5B32), PACK(0x5974), PACK(0x58B6),
 186                 PACK(0x5DF8), PACK(0x5C3A), PACK(0x5E7C), PACK(0x5FBE),
 187                 PACK(0xE100), PACK(0xE0C2), PACK(0xE284), PACK(0xE346),
 188                 PACK(0xE608), PACK(0xE7CA), PACK(0xE58C), PACK(0xE44E),
 189                 PACK(0xEF10), PACK(0xEED2), PACK(0xEC94), PACK(0xED56),
 190                 PACK(0xE818), PACK(0xE9DA), PACK(0xEB9C), PACK(0xEA5E),
 191                 PACK(0xFD20), PACK(0xFCE2), PACK(0xFEA4), PACK(0xFF66),
 192                 PACK(0xFA28), PACK(0xFBEA), PACK(0xF9AC), PACK(0xF86E),
 193                 PACK(0xF330), PACK(0xF2F2), PACK(0xF0B4), PACK(0xF176),
 194                 PACK(0xF438), PACK(0xF5FA), PACK(0xF7BC), PACK(0xF67E),
 195                 PACK(0xD940), PACK(0xD882), PACK(0xDAC4), PACK(0xDB06),
 196                 PACK(0xDE48), PACK(0xDF8A), PACK(0xDDCC), PACK(0xDC0E),
 197                 PACK(0xD750), PACK(0xD692), PACK(0xD4D4), PACK(0xD516),
 198                 PACK(0xD058), PACK(0xD19A), PACK(0xD3DC), PACK(0xD21E),
 199                 PACK(0xC560), PACK(0xC4A2), PACK(0xC6E4), PACK(0xC726),
 200                 PACK(0xC268), PACK(0xC3AA), PACK(0xC1EC), PACK(0xC02E),
 201                 PACK(0xCB70), PACK(0xCAB2), PACK(0xC8F4), PACK(0xC936),
 202                 PACK(0xCC78), PACK(0xCDBA), PACK(0xCFFC), PACK(0xCE3E),
 203                 PACK(0x9180), PACK(0x9042), PACK(0x9204), PACK(0x93C6),
 204                 PACK(0x9688), PACK(0x974A), PACK(0x950C), PACK(0x94CE),
 205                 PACK(0x9F90), PACK(0x9E52), PACK(0x9C14), PACK(0x9DD6),
 206                 PACK(0x9898), PACK(0x995A), PACK(0x9B1C), PACK(0x9ADE),
 207                 PACK(0x8DA0), PACK(0x8C62), PACK(0x8E24), PACK(0x8FE6),
 208                 PACK(0x8AA8), PACK(0x8B6A), PACK(0x892C), PACK(0x88EE),
 209                 PACK(0x83B0), PACK(0x8272), PACK(0x8034), PACK(0x81F6),
 210                 PACK(0x84B8), PACK(0x857A), PACK(0x873C), PACK(0x86FE),
 211                 PACK(0xA9C0), PACK(0xA802), PACK(0xAA44), PACK(0xAB86),
 212                 PACK(0xAEC8), PACK(0xAF0A), PACK(0xAD4C), PACK(0xAC8E),
 213                 PACK(0xA7D0), PACK(0xA612), PACK(0xA454), PACK(0xA596),
 214                 PACK(0xA0D8), PACK(0xA11A), PACK(0xA35C), PACK(0xA29E),
 215                 PACK(0xB5E0), PACK(0xB422), PACK(0xB664), PACK(0xB7A6),
 216                 PACK(0xB2E8), PACK(0xB32A), PACK(0xB16C), PACK(0xB0AE),
 217                 PACK(0xBBF0), PACK(0xBA32), PACK(0xB874), PACK(0xB9B6),
 218                 PACK(0xBCF8), PACK(0xBD3A), PACK(0xBF7C), PACK(0xBEBE) };
 219
 220         while (1) {
 221                 Z.hi ^= Htable[n].hi;
 222                 Z.lo ^= Htable[n].lo;
 223
 224                 if ((u8 *)Xi==xi)       break;
 225
 226                 n = *(--xi);
 227
 228                 rem  = (size_t)Z.lo&0xff;
 229                 Z.lo = (Z.hi<<56)|(Z.lo>>8);
 230                 Z.hi = (Z.hi>>8);
 231                 if (sizeof(size_t)==8)
 232                         Z.hi ^= rem_8bit[rem];
 233                 else
 234                         Z.hi ^= (u64)rem_8bit[rem]<<32;
 235         }
 236
 237         if (is_endian.little) {
 238 #ifdef BSWAP8
 239                 Xi[0] = BSWAP8(Z.hi);
 240                 Xi[1] = BSWAP8(Z.lo);
 241 #else
 242                 u8 *p = (u8 *)Xi;
 243                 u32 v;
 244                 v = (u32)(Z.hi>>32);    PUTU32(p,v);
 245                 v = (u32)(Z.hi);        PUTU32(p+4,v);
 246                 v = (u32)(Z.lo>>32);    PUTU32(p+8,v);
 247                 v = (u32)(Z.lo);        PUTU32(p+12,v);
 248 #endif
 249         }
 250         else {
 251                 Xi[0] = Z.hi;
 252                 Xi[1] = Z.lo;
 253         }
 254 }
 255 #define GCM_MUL(ctx,Xi)   gcm_gmult_8bit(ctx->Xi.u,ctx->Htable)
 256
 257 #elif   TABLE_BITS==4
 258
 259 static void gcm_init_4bit(u128 Htable[16], u64 H[2])
 260 {
 261         u128 V;
 262 #if defined(OPENSSL_SMALL_FOOTPRINT)
 263         int  i;
 264 #endif
 265
 266         Htable[0].hi = 0;
 267         Htable[0].lo = 0;
 268         V.hi = H[0];
 269         V.lo = H[1];
 270
 271 #if defined(OPENSSL_SMALL_FOOTPRINT)
 272         for (Htable[8]=V, i=4; i>0; i>>=1) {
 273                 REDUCE1BIT(V);
 274                 Htable[i] = V;
 275         }
 276
 277         for (i=2; i<16; i<<=1) {
 278                 u128 *Hi = Htable+i;
 279                 int   j;
 280                 for (V=*Hi, j=1; j<i; ++j) {
 281                         Hi[j].hi = V.hi^Htable[j].hi;
 282                         Hi[j].lo = V.lo^Htable[j].lo;
 283                 }
 284         }
 285 #else
 286         Htable[8] = V;
 287         REDUCE1BIT(V);
 288         Htable[4] = V;
 289         REDUCE1BIT(V);
 290         Htable[2] = V;
 291         REDUCE1BIT(V);
 292         Htable[1] = V;
 293         Htable[3].hi  = V.hi^Htable[2].hi, Htable[3].lo  = V.lo^Htable[2].lo;
 294         V=Htable[4];
 295         Htable[5].hi  = V.hi^Htable[1].hi, Htable[5].lo  = V.lo^Htable[1].lo;
 296         Htable[6].hi  = V.hi^Htable[2].hi, Htable[6].lo  = V.lo^Htable[2].lo;
 297         Htable[7].hi  = V.hi^Htable[3].hi, Htable[7].lo  = V.lo^Htable[3].lo;
 298         V=Htable[8];
 299         Htable[9].hi  = V.hi^Htable[1].hi, Htable[9].lo  = V.lo^Htable[1].lo;
 300         Htable[10].hi = V.hi^Htable[2].hi, Htable[10].lo = V.lo^Htable[2].lo;
 301         Htable[11].hi = V.hi^Htable[3].hi, Htable[11].lo = V.lo^Htable[3].lo;
 302         Htable[12].hi = V.hi^Htable[4].hi, Htable[12].lo = V.lo^Htable[4].lo;
 303         Htable[13].hi = V.hi^Htable[5].hi, Htable[13].lo = V.lo^Htable[5].lo;
 304         Htable[14].hi = V.hi^Htable[6].hi, Htable[14].lo = V.lo^Htable[6].lo;
 305         Htable[15].hi = V.hi^Htable[7].hi, Htable[15].lo = V.lo^Htable[7].lo;
 306 #endif
 307 #if defined(GHASH_ASM) && (defined(__arm__) || defined(__arm))
 308         /*
 309          * ARM assembler expects specific dword order in Htable.
 310          */
 311         {
 312         int j;
 313         const union { long one; char little; } is_endian = {1};
 314
 315         if (is_endian.little)
 316                 for (j=0;j<16;++j) {
 317                         V = Htable[j];
 318                         Htable[j].hi = V.lo;
 319                         Htable[j].lo = V.hi;
 320                 }
 321         else
 322                 for (j=0;j<16;++j) {
 323                         V = Htable[j];
 324                         Htable[j].hi = V.lo<<32|V.lo>>32;
 325                         Htable[j].lo = V.hi<<32|V.hi>>32;
 326                 }
 327         }
 328 #endif
 329 }
 330
 331 #ifndef GHASH_ASM
 332 static const size_t rem_4bit[16] = {
 333         PACK(0x0000), PACK(0x1C20), PACK(0x3840), PACK(0x2460),
 334         PACK(0x7080), PACK(0x6CA0), PACK(0x48C0), PACK(0x54E0),
 335         PACK(0xE100), PACK(0xFD20), PACK(0xD940), PACK(0xC560),
 336         PACK(0x9180), PACK(0x8DA0), PACK(0xA9C0), PACK(0xB5E0) };
 337
 338 static void gcm_gmult_4bit(u64 Xi[2], const u128 Htable[16])
 339 {
 340         u128 Z;
 341         int cnt = 15;
 342         size_t rem, nlo, nhi;
 343         const union { long one; char little; } is_endian = {1};
 344
 345         nlo  = ((const u8 *)Xi)[15];
 346         nhi  = nlo>>4;
 347         nlo &= 0xf;
 348
 349         Z.hi = Htable[nlo].hi;
 350         Z.lo = Htable[nlo].lo;
 351
 352         while (1) {
 353                 rem  = (size_t)Z.lo&0xf;
 354                 Z.lo = (Z.hi<<60)|(Z.lo>>4);
 355                 Z.hi = (Z.hi>>4);
 356                 if (sizeof(size_t)==8)
 357                         Z.hi ^= rem_4bit[rem];
 358                 else
 359                         Z.hi ^= (u64)rem_4bit[rem]<<32;
 360
 361                 Z.hi ^= Htable[nhi].hi;
 362                 Z.lo ^= Htable[nhi].lo;
 363
 364                 if (--cnt<0)            break;
 365
 366                 nlo  = ((const u8 *)Xi)[cnt];
 367                 nhi  = nlo>>4;
 368                 nlo &= 0xf;
 369
 370                 rem  = (size_t)Z.lo&0xf;
 371                 Z.lo = (Z.hi<<60)|(Z.lo>>4);
 372                 Z.hi = (Z.hi>>4);
 373                 if (sizeof(size_t)==8)
 374                         Z.hi ^= rem_4bit[rem];
 375                 else
 376                         Z.hi ^= (u64)rem_4bit[rem]<<32;
 377
 378                 Z.hi ^= Htable[nlo].hi;
 379                 Z.lo ^= Htable[nlo].lo;
 380         }
 381
 382         if (is_endian.little) {
 383 #ifdef BSWAP8
 384                 Xi[0] = BSWAP8(Z.hi);
 385                 Xi[1] = BSWAP8(Z.lo);
 386 #else
 387                 u8 *p = (u8 *)Xi;
 388                 u32 v;
 389                 v = (u32)(Z.hi>>32);    PUTU32(p,v);
 390                 v = (u32)(Z.hi);        PUTU32(p+4,v);
 391                 v = (u32)(Z.lo>>32);    PUTU32(p+8,v);
 392                 v = (u32)(Z.lo);        PUTU32(p+12,v);
 393 #endif
 394         }
 395         else {
 396                 Xi[0] = Z.hi;
 397                 Xi[1] = Z.lo;
 398         }
 399 }
 400
 401 #if !defined(OPENSSL_SMALL_FOOTPRINT)
 402 /*
 403  * Streamed gcm_mult_4bit, see CRYPTO_gcm128_[en|de]crypt for
 404  * details... Compiler-generated code doesn't seem to give any
 405  * performance improvement, at least not on x86[_64]. It's here
 406  * mostly as reference and a placeholder for possible future
 407  * non-trivial optimization[s]...
 408  */
 409 static void gcm_ghash_4bit(u64 Xi[2],const u128 Htable[16],
 410                                 const u8 *inp,size_t len)
 411 {
 412     u128 Z;
 413     int cnt;
 414     size_t rem, nlo, nhi;
 415     const union { long one; char little; } is_endian = {1};
 416
 417 #if 1
 418     do {
 419         cnt  = 15;
 420         nlo  = ((const u8 *)Xi)[15];
 421         nlo ^= inp[15];
 422         nhi  = nlo>>4;
 423         nlo &= 0xf;
 424
 425         Z.hi = Htable[nlo].hi;
 426         Z.lo = Htable[nlo].lo;
 427
 428         while (1) {
 429                 rem  = (size_t)Z.lo&0xf;
 430                 Z.lo = (Z.hi<<60)|(Z.lo>>4);
 431                 Z.hi = (Z.hi>>4);
 432                 if (sizeof(size_t)==8)
 433                         Z.hi ^= rem_4bit[rem];
 434                 else
 435                         Z.hi ^= (u64)rem_4bit[rem]<<32;
 436
 437                 Z.hi ^= Htable[nhi].hi;
 438                 Z.lo ^= Htable[nhi].lo;
 439
 440                 if (--cnt<0)            break;
 441
 442                 nlo  = ((const u8 *)Xi)[cnt];
 443                 nlo ^= inp[cnt];
 444                 nhi  = nlo>>4;
 445                 nlo &= 0xf;
 446
 447                 rem  = (size_t)Z.lo&0xf;
 448                 Z.lo = (Z.hi<<60)|(Z.lo>>4);
 449                 Z.hi = (Z.hi>>4);
 450                 if (sizeof(size_t)==8)
 451                         Z.hi ^= rem_4bit[rem];
 452                 else
 453                         Z.hi ^= (u64)rem_4bit[rem]<<32;
 454
 455                 Z.hi ^= Htable[nlo].hi;
 456                 Z.lo ^= Htable[nlo].lo;
 457         }
 458 #else
 459     /*
 460      * Extra 256+16 bytes per-key plus 512 bytes shared tables
 461      * [should] give ~50% improvement... One could have PACK()-ed
 462      * the rem_8bit even here, but the priority is to minimize
 463      * cache footprint...
 464      */
 465     u128 Hshr4[16];     /* Htable shifted right by 4 bits */
 466     u8   Hshl4[16];     /* Htable shifted left  by 4 bits */
 467     static const unsigned short rem_8bit[256] = {
 468         0x0000, 0x01C2, 0x0384, 0x0246, 0x0708, 0x06CA, 0x048C, 0x054E,
 469         0x0E10, 0x0FD2, 0x0D94, 0x0C56, 0x0918, 0x08DA, 0x0A9C, 0x0B5E,
 470         0x1C20, 0x1DE2, 0x1FA4, 0x1E66, 0x1B28, 0x1AEA, 0x18AC, 0x196E,
 471         0x1230, 0x13F2, 0x11B4, 0x1076, 0x1538, 0x14FA, 0x16BC, 0x177E,
 472         0x3840, 0x3982, 0x3BC4, 0x3A06, 0x3F48, 0x3E8A, 0x3CCC, 0x3D0E,
 473         0x3650, 0x3792, 0x35D4, 0x3416, 0x3158, 0x309A, 0x32DC, 0x331E,
 474         0x2460, 0x25A2, 0x27E4, 0x2626, 0x2368, 0x22AA, 0x20EC, 0x212E,
 475         0x2A70, 0x2BB2, 0x29F4, 0x2836, 0x2D78, 0x2CBA, 0x2EFC, 0x2F3E,
 476         0x7080, 0x7142, 0x7304, 0x72C6, 0x7788, 0x764A, 0x740C, 0x75CE,
 477         0x7E90, 0x7F52, 0x7D14, 0x7CD6, 0x7998, 0x785A, 0x7A1C, 0x7BDE,
 478         0x6CA0, 0x6D62, 0x6F24, 0x6EE6, 0x6BA8, 0x6A6A, 0x682C, 0x69EE,
 479         0x62B0, 0x6372, 0x6134, 0x60F6, 0x65B8, 0x647A, 0x663C, 0x67FE,
 480         0x48C0, 0x4902, 0x4B44, 0x4A86, 0x4FC8, 0x4E0A, 0x4C4C, 0x4D8E,
 481         0x46D0, 0x4712, 0x4554, 0x4496, 0x41D8, 0x401A, 0x425C, 0x439E,
 482         0x54E0, 0x5522, 0x5764, 0x56A6, 0x53E8, 0x522A, 0x506C, 0x51AE,
 483         0x5AF0, 0x5B32, 0x5974, 0x58B6, 0x5DF8, 0x5C3A, 0x5E7C, 0x5FBE,
 484         0xE100, 0xE0C2, 0xE284, 0xE346, 0xE608, 0xE7CA, 0xE58C, 0xE44E,
 485         0xEF10, 0xEED2, 0xEC94, 0xED56, 0xE818, 0xE9DA, 0xEB9C, 0xEA5E,
 486         0xFD20, 0xFCE2, 0xFEA4, 0xFF66, 0xFA28, 0xFBEA, 0xF9AC, 0xF86E,
 487         0xF330, 0xF2F2, 0xF0B4, 0xF176, 0xF438, 0xF5FA, 0xF7BC, 0xF67E,
 488         0xD940, 0xD882, 0xDAC4, 0xDB06, 0xDE48, 0xDF8A, 0xDDCC, 0xDC0E,
 489         0xD750, 0xD692, 0xD4D4, 0xD516, 0xD058, 0xD19A, 0xD3DC, 0xD21E,
 490         0xC560, 0xC4A2, 0xC6E4, 0xC726, 0xC268, 0xC3AA, 0xC1EC, 0xC02E,
 491         0xCB70, 0xCAB2, 0xC8F4, 0xC936, 0xCC78, 0xCDBA, 0xCFFC, 0xCE3E,
 492         0x9180, 0x9042, 0x9204, 0x93C6, 0x9688, 0x974A, 0x950C, 0x94CE,
 493         0x9F90, 0x9E52, 0x9C14, 0x9DD6, 0x9898, 0x995A, 0x9B1C, 0x9ADE,
 494         0x8DA0, 0x8C62, 0x8E24, 0x8FE6, 0x8AA8, 0x8B6A, 0x892C, 0x88EE,
 495         0x83B0, 0x8272, 0x8034, 0x81F6, 0x84B8, 0x857A, 0x873C, 0x86FE,
 496         0xA9C0, 0xA802, 0xAA44, 0xAB86, 0xAEC8, 0xAF0A, 0xAD4C, 0xAC8E,
 497         0xA7D0, 0xA612, 0xA454, 0xA596, 0xA0D8, 0xA11A, 0xA35C, 0xA29E,
 498         0xB5E0, 0xB422, 0xB664, 0xB7A6, 0xB2E8, 0xB32A, 0xB16C, 0xB0AE,
 499         0xBBF0, 0xBA32, 0xB874, 0xB9B6, 0xBCF8, 0xBD3A, 0xBF7C, 0xBEBE };
 500     /*
 501      * This pre-processing phase slows down procedure by approximately
 502      * same time as it makes each loop spin faster. In other words
 503      * single block performance is approximately same as straightforward
 504      * "4-bit" implementation, and then it goes only faster...
 505      */
 506     for (cnt=0; cnt<16; ++cnt) {
 507         Z.hi = Htable[cnt].hi;
 508         Z.lo = Htable[cnt].lo;
 509         Hshr4[cnt].lo = (Z.hi<<60)|(Z.lo>>4);
 510         Hshr4[cnt].hi = (Z.hi>>4);
 511         Hshl4[cnt]    = (u8)(Z.lo<<4);
 512     }
 513
 514     do {
 515         for (Z.lo=0, Z.hi=0, cnt=15; cnt; --cnt) {
 516                 nlo  = ((const u8 *)Xi)[cnt];
 517                 nlo ^= inp[cnt];
 518                 nhi  = nlo>>4;
 519                 nlo &= 0xf;
 520
 521                 Z.hi ^= Htable[nlo].hi;
 522                 Z.lo ^= Htable[nlo].lo;
 523
 524                 rem = (size_t)Z.lo&0xff;
 525
 526                 Z.lo = (Z.hi<<56)|(Z.lo>>8);
 527                 Z.hi = (Z.hi>>8);
 528
 529                 Z.hi ^= Hshr4[nhi].hi;
 530                 Z.lo ^= Hshr4[nhi].lo;
 531                 Z.hi ^= (u64)rem_8bit[rem^Hshl4[nhi]]<<48;
 532         }
 533
 534         nlo  = ((const u8 *)Xi)[0];
 535         nlo ^= inp[0];
 536         nhi  = nlo>>4;
 537         nlo &= 0xf;
 538
 539         Z.hi ^= Htable[nlo].hi;
 540         Z.lo ^= Htable[nlo].lo;
 541
 542         rem = (size_t)Z.lo&0xf;
 543
 544         Z.lo = (Z.hi<<60)|(Z.lo>>4);
 545         Z.hi = (Z.hi>>4);
 546
 547         Z.hi ^= Htable[nhi].hi;
 548         Z.lo ^= Htable[nhi].lo;
 549         Z.hi ^= ((u64)rem_8bit[rem<<4])<<48;
 550 #endif
 551
 552         if (is_endian.little) {
 553 #ifdef BSWAP8
 554                 Xi[0] = BSWAP8(Z.hi);
 555                 Xi[1] = BSWAP8(Z.lo);
 556 #else
 557                 u8 *p = (u8 *)Xi;
 558                 u32 v;
 559                 v = (u32)(Z.hi>>32);    PUTU32(p,v);
 560                 v = (u32)(Z.hi);        PUTU32(p+4,v);
 561                 v = (u32)(Z.lo>>32);    PUTU32(p+8,v);
 562                 v = (u32)(Z.lo);        PUTU32(p+12,v);
 563 #endif
 564         }
 565         else {
 566                 Xi[0] = Z.hi;
 567                 Xi[1] = Z.lo;
 568         }
 569     } while (inp+=16, len-=16);
 570 }
 571 #endif
 572 #else
 573 void gcm_gmult_4bit(u64 Xi[2],const u128 Htable[16]);
 574 void gcm_ghash_4bit(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
 575 #endif
 576
 577 #define GCM_MUL(ctx,Xi)   gcm_gmult_4bit(ctx->Xi.u,ctx->Htable)
 578 #if defined(GHASH_ASM) || !defined(OPENSSL_SMALL_FOOTPRINT)
 579 #define GHASH(ctx,in,len) gcm_ghash_4bit((ctx)->Xi.u,(ctx)->Htable,in,len)
 580 /* GHASH_CHUNK is "stride parameter" missioned to mitigate cache
 581  * trashing effect. In other words idea is to hash data while it's
 582  * still in L1 cache after encryption pass... */
 583 #define GHASH_CHUNK       1024
 584 #endif
 585
 586 #else   /* TABLE_BITS */
 587
 588 static void gcm_gmult_1bit(u64 Xi[2],const u64 H[2])
 589 {
 590         u128 V,Z = { 0,0 };
 591         long X;
 592         int  i,j;
 593         const long *xi = (const long *)Xi;
 594         const union { long one; char little; } is_endian = {1};
 595
 596         V.hi = H[0];    /* H is in host byte order, no byte swapping */
 597         V.lo = H[1];
 598
 599         for (j=0; j<16/sizeof(long); ++j) {
 600                 if (is_endian.little) {
 601                         if (sizeof(long)==8) {
 602 #ifdef BSWAP8
 603                                 X = (long)(BSWAP8(xi[j]));
 604 #else
 605                                 const u8 *p = (const u8 *)(xi+j);
 606                                 X = (long)((u64)GETU32(p)<<32|GETU32(p+4));
 607 #endif
 608                         }
 609                         else {
 610                                 const u8 *p = (const u8 *)(xi+j);
 611                                 X = (long)GETU32(p);
 612                         }
 613                 }
 614                 else
 615                         X = xi[j];
 616
 617                 for (i=0; i<8*sizeof(long); ++i, X<<=1) {
 618                         u64 M = (u64)(X>>(8*sizeof(long)-1));
 619                         Z.hi ^= V.hi&M;
 620                         Z.lo ^= V.lo&M;
 621
 622                         REDUCE1BIT(V);
 623                 }
 624         }
 625
 626         if (is_endian.little) {
 627 #ifdef BSWAP8
 628                 Xi[0] = BSWAP8(Z.hi);
 629                 Xi[1] = BSWAP8(Z.lo);
 630 #else
 631                 u8 *p = (u8 *)Xi;
 632                 u32 v;
 633                 v = (u32)(Z.hi>>32);    PUTU32(p,v);
 634                 v = (u32)(Z.hi);        PUTU32(p+4,v);
 635                 v = (u32)(Z.lo>>32);    PUTU32(p+8,v);
 636                 v = (u32)(Z.lo);        PUTU32(p+12,v);
 637 #endif
 638         }
 639         else {
 640                 Xi[0] = Z.hi;
 641                 Xi[1] = Z.lo;
 642         }
 643 }
 644 #define GCM_MUL(ctx,Xi)   gcm_gmult_1bit(ctx->Xi.u,ctx->H.u)
 645
 646 #endif
 647
 648 struct gcm128_context {
 649         /* Following 6 names follow names in GCM specification */
 650         union { u64 u[2]; u32 d[4]; u8 c[16]; } Yi,EKi,EK0,
 651                                                 Xi,H,len;
 652         /* Pre-computed table used by gcm_gmult_* */
 653 #if TABLE_BITS==8
 654         u128 Htable[256];
 655 #else
 656         u128 Htable[16];
 657         void (*gmult)(u64 Xi[2],const u128 Htable[16]);
 658         void (*ghash)(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
 659 #endif
 660         unsigned int res, pad;
 661         block128_f block;
 662         void *key;
 663 };
 664
 665 #if     TABLE_BITS==4 && defined(GHASH_ASM) && !defined(I386_ONLY) && \
 666         (defined(__i386)        || defined(__i386__)    || \
 667          defined(__x86_64)      || defined(__x86_64__)  || \
 668          defined(_M_IX86)       || defined(_M_AMD64)    || defined(_M_X64))
 669 # define GHASH_ASM_IAX
 670 extern unsigned int OPENSSL_ia32cap_P[2];
 671
 672 void gcm_init_clmul(u128 Htable[16],const u64 Xi[2]);
 673 void gcm_gmult_clmul(u64 Xi[2],const u128 Htable[16]);
 674 void gcm_ghash_clmul(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
 675
 676 # if    defined(__i386) || defined(__i386__) || defined(_M_IX86)
 677 #  define GHASH_ASM_X86
 678 void gcm_gmult_4bit_mmx(u64 Xi[2],const u128 Htable[16]);
 679 void gcm_ghash_4bit_mmx(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
 680
 681 void gcm_gmult_4bit_x86(u64 Xi[2],const u128 Htable[16]);
 682 void gcm_ghash_4bit_x86(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
 683 # endif
 684
 685 # undef  GCM_MUL
 686 # define GCM_MUL(ctx,Xi)   (*((ctx)->gmult))(ctx->Xi.u,ctx->Htable)
 687 # undef  GHASH
 688 # define GHASH(ctx,in,len) (*((ctx)->ghash))((ctx)->Xi.u,(ctx)->Htable,in,len)
 689 #endif
 690
 691 void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx,void *key,block128_f block)
 692 {
 693         const union { long one; char little; } is_endian = {1};
 694
 695         memset(ctx,0,sizeof(*ctx));
 696         ctx->block = block;
 697         ctx->key   = key;
 698
 699         (*block)(ctx->H.c,ctx->H.c,key);
 700
 701         if (is_endian.little) {
 702                 /* H is stored in host byte order */
 703 #ifdef BSWAP8
 704                 ctx->H.u[0] = BSWAP8(ctx->H.u[0]);
 705                 ctx->H.u[1] = BSWAP8(ctx->H.u[1]);
 706 #else
 707                 u8 *p = ctx->H.c;
 708                 u64 hi,lo;
 709                 hi = (u64)GETU32(p)  <<32|GETU32(p+4);
 710                 lo = (u64)GETU32(p+8)<<32|GETU32(p+12);
 711                 ctx->H.u[0] = hi;
 712                 ctx->H.u[1] = lo;
 713 #endif
 714         }
 715
 716 #if     TABLE_BITS==8
 717         gcm_init_8bit(ctx->Htable,ctx->H.u);
 718 #elif   TABLE_BITS==4
 719 # if    defined(GHASH_ASM_IAX)                  /* both x86 and x86_64 */
 720         if (OPENSSL_ia32cap_P[1]&(1<<1)) {
 721                 gcm_init_clmul(ctx->Htable,ctx->H.u);
 722                 ctx->gmult = gcm_gmult_clmul;
 723                 ctx->ghash = gcm_ghash_clmul;
 724                 return;
 725         }
 726         gcm_init_4bit(ctx->Htable,ctx->H.u);
 727 #  if   defined(GHASH_ASM_X86)                  /* x86 only */
 728         if (OPENSSL_ia32cap_P[0]&(1<<23)) {
 729                 ctx->gmult = gcm_gmult_4bit_mmx;
 730                 ctx->ghash = gcm_ghash_4bit_mmx;
 731         } else {
 732                 ctx->gmult = gcm_gmult_4bit_x86;
 733                 ctx->ghash = gcm_ghash_4bit_x86;
 734         }
 735 #  else
 736         ctx->gmult = gcm_gmult_4bit;
 737         ctx->ghash = gcm_ghash_4bit;
 738 #  endif
 739 # else
 740         gcm_init_4bit(ctx->Htable,ctx->H.u);
 741 # endif
 742 #endif
 743 }
 744
 745 void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx,const unsigned char *iv,size_t len)
 746 {
 747         const union { long one; char little; } is_endian = {1};
 748         unsigned int ctr;
 749
 750         ctx->Yi.u[0]  = 0;
 751         ctx->Yi.u[1]  = 0;
 752         ctx->Xi.u[0]  = 0;
 753         ctx->Xi.u[1]  = 0;
 754         ctx->len.u[0] = 0;
 755         ctx->len.u[1] = 0;
 756         ctx->res = 0;
 757
 758         if (len==12) {
 759                 memcpy(ctx->Yi.c,iv,12);
 760                 ctx->Yi.c[15]=1;
 761                 ctr=1;
 762         }
 763         else {
 764                 size_t i;
 765                 u64 len0 = len;
 766
 767                 while (len>=16) {
 768                         for (i=0; i<16; ++i) ctx->Yi.c[i] ^= iv[i];
 769                         GCM_MUL(ctx,Yi);
 770                         iv += 16;
 771                         len -= 16;
 772                 }
 773                 if (len) {
 774                         for (i=0; i<len; ++i) ctx->Yi.c[i] ^= iv[i];
 775                         GCM_MUL(ctx,Yi);
 776                 }
 777                 len0 <<= 3;
 778                 if (is_endian.little) {
 779 #ifdef BSWAP8
 780                         ctx->Yi.u[1]  ^= BSWAP8(len0);
 781 #else
 782                         ctx->Yi.c[8]  ^= (u8)(len0>>56);
 783                         ctx->Yi.c[9]  ^= (u8)(len0>>48);
 784                         ctx->Yi.c[10] ^= (u8)(len0>>40);
 785                         ctx->Yi.c[11] ^= (u8)(len0>>32);
 786                         ctx->Yi.c[12] ^= (u8)(len0>>24);
 787                         ctx->Yi.c[13] ^= (u8)(len0>>16);
 788                         ctx->Yi.c[14] ^= (u8)(len0>>8);
 789                         ctx->Yi.c[15] ^= (u8)(len0);
 790 #endif
 791                 }
 792                 else
 793                         ctx->Yi.u[1]  ^= len0;
 794
 795                 GCM_MUL(ctx,Yi);
 796
 797                 if (is_endian.little)
 798                         ctr = GETU32(ctx->Yi.c+12);
 799                 else
 800                         ctr = ctx->Yi.d[3];
 801         }
 802
 803         (*ctx->block)(ctx->Yi.c,ctx->EK0.c,ctx->key);
 804         ++ctr;
 805         if (is_endian.little)
 806                 PUTU32(ctx->Yi.c+12,ctr);
 807         else
 808                 ctx->Yi.d[3] = ctr;
 809 }
 810
 811 void CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx,const unsigned char *aad,size_t len)
 812 {
 813         size_t i;
 814
 815         ctx->len.u[0] += len;
 816
 817 #ifdef GHASH
 818         if ((i = (len&(size_t)-16))) {
 819                 GHASH(ctx,aad,i);
 820                 aad += i;
 821                 len -= i;
 822         }
 823 #else
 824         while (len>=16) {
 825                 for (i=0; i<16; ++i) ctx->Xi.c[i] ^= aad[i];
 826                 GCM_MUL(ctx,Xi);
 827                 aad += 16;
 828                 len -= 16;
 829         }
 830 #endif
 831         if (len) {
 832                 for (i=0; i<len; ++i) ctx->Xi.c[i] ^= aad[i];
 833                 GCM_MUL(ctx,Xi);
 834         }
 835 }
 836
 837 void CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
 838                 const unsigned char *in, unsigned char *out,
 839                 size_t len)
 840 {
 841         const union { long one; char little; } is_endian = {1};
 842         unsigned int n, ctr;
 843         size_t i;
 844
 845         ctx->len.u[1] += len;
 846         n   = ctx->res;
 847         if (is_endian.little)
 848                 ctr = GETU32(ctx->Yi.c+12);
 849         else
 850                 ctr = ctx->Yi.d[3];
 851
 852 #if !defined(OPENSSL_SMALL_FOOTPRINT)
 853         if (16%sizeof(size_t) == 0) do {        /* always true actually */
 854                 if (n) {
 855                         while (n && len) {
 856                                 ctx->Xi.c[n] ^= *(out++) = *(in++)^ctx->EKi.c[n];
 857                                 --len;
 858                                 n = (n+1)%16;
 859                         }
 860                         if (n==0) GCM_MUL(ctx,Xi);
 861                         else {
 862                                 ctx->res = n;
 863                                 return;
 864                         }
 865                 }
 866 #if defined(STRICT_ALIGNMENT)
 867                 if (((size_t)in|(size_t)out)%sizeof(size_t) != 0)
 868                         break;
 869 #endif
 870 #if defined(GHASH) && defined(GHASH_CHUNK)
 871                 while (len>=GHASH_CHUNK) {
 872                     size_t j=GHASH_CHUNK;
 873
 874                     while (j) {
 875                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
 876                         ++ctr;
 877                         if (is_endian.little)
 878                                 PUTU32(ctx->Yi.c+12,ctr);
 879                         else
 880                                 ctx->Yi.d[3] = ctr;
 881                         for (i=0; i<16; i+=sizeof(size_t))
 882                                 *(size_t *)(out+i) =
 883                                 *(size_t *)(in+i)^*(size_t *)(ctx->EKi.c+i);
 884                         out += 16;
 885                         in  += 16;
 886                         j   -= 16;
 887                     }
 888                     GHASH(ctx,out-GHASH_CHUNK,GHASH_CHUNK);
 889                     len -= GHASH_CHUNK;
 890                 }
 891                 if ((i = (len&(size_t)-16))) {
 892                     size_t j=i;
 893
 894                     while (len>=16) {
 895                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
 896                         ++ctr;
 897                         if (is_endian.little)
 898                                 PUTU32(ctx->Yi.c+12,ctr);
 899                         else
 900                                 ctx->Yi.d[3] = ctr;
 901                         for (i=0; i<16; i+=sizeof(size_t))
 902                                 *(size_t *)(out+i) =
 903                                 *(size_t *)(in+i)^*(size_t *)(ctx->EKi.c+i);
 904                         out += 16;
 905                         in  += 16;
 906                         len -= 16;
 907                     }
 908                     GHASH(ctx,out-j,j);
 909                 }
 910 #else
 911                 while (len>=16) {
 912                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
 913                         ++ctr;
 914                         if (is_endian.little)
 915                                 PUTU32(ctx->Yi.c+12,ctr);
 916                         else
 917                                 ctx->Yi.d[3] = ctr;
 918                         for (i=0; i<16; i+=sizeof(size_t))
 919                                 *(size_t *)(ctx->Xi.c+i) ^=
 920                                 *(size_t *)(out+i) =
 921                                 *(size_t *)(in+i)^*(size_t *)(ctx->EKi.c+i);
 922                         GCM_MUL(ctx,Xi);
 923                         out += 16;
 924                         in  += 16;
 925                         len -= 16;
 926                 }
 927 #endif
 928                 if (len) {
 929                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
 930                         ++ctr;
 931                         if (is_endian.little)
 932                                 PUTU32(ctx->Yi.c+12,ctr);
 933                         else
 934                                 ctx->Yi.d[3] = ctr;
 935                         while (len--) {
 936                                 ctx->Xi.c[n] ^= out[n] = in[n]^ctx->EKi.c[n];
 937                                 ++n;
 938                         }
 939                 }
 940
 941                 ctx->res = n;
 942                 return;
 943         } while(0);
 944 #endif
 945         for (i=0;i<len;++i) {
 946                 if (n==0) {
 947                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
 948                         ++ctr;
 949                         if (is_endian.little)
 950                                 PUTU32(ctx->Yi.c+12,ctr);
 951                         else
 952                                 ctx->Yi.d[3] = ctr;
 953                 }
 954                 ctx->Xi.c[n] ^= out[i] = in[i]^ctx->EKi.c[n];
 955                 n = (n+1)%16;
 956                 if (n==0)
 957                         GCM_MUL(ctx,Xi);
 958         }
 959
 960         ctx->res = n;
 961 }
 962
 963 void CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
 964                 const unsigned char *in, unsigned char *out,
 965                 size_t len)
 966 {
 967         const union { long one; char little; } is_endian = {1};
 968         unsigned int n, ctr;
 969         size_t i;
 970
 971         ctx->len.u[1] += len;
 972         n   = ctx->res;
 973         if (is_endian.little)
 974                 ctr = GETU32(ctx->Yi.c+12);
 975         else
 976                 ctr = ctx->Yi.d[3];
 977
 978 #if !defined(OPENSSL_SMALL_FOOTPRINT)
 979         if (16%sizeof(size_t) == 0) do {        /* always true actually */
 980                 if (n) {
 981                         while (n && len) {
 982                                 u8 c = *(in++);
 983                                 *(out++) = c^ctx->EKi.c[n];
 984                                 ctx->Xi.c[n] ^= c;
 985                                 --len;
 986                                 n = (n+1)%16;
 987                         }
 988                         if (n==0) GCM_MUL (ctx,Xi);
 989                         else {
 990                                 ctx->res = n;
 991                                 return;
 992                         }
 993                 }
 994 #if defined(STRICT_ALIGNMENT)
 995                 if (((size_t)in|(size_t)out)%sizeof(size_t) != 0)
 996                         break;
 997 #endif
 998 #if defined(GHASH) && defined(GHASH_CHUNK)
 999                 while (len>=GHASH_CHUNK) {
1000                     size_t j=GHASH_CHUNK;
1001
1002                     GHASH(ctx,in,GHASH_CHUNK);
1003                     while (j) {
1004                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
1005                         ++ctr;
1006                         if (is_endian.little)
1007                                 PUTU32(ctx->Yi.c+12,ctr);
1008                         else
1009                                 ctx->Yi.d[3] = ctr;
1010                         for (i=0; i<16; i+=sizeof(size_t))
1011                                 *(size_t *)(out+i) =
1012                                 *(size_t *)(in+i)^*(size_t *)(ctx->EKi.c+i);
1013                         out += 16;
1014                         in  += 16;
1015                         j   -= 16;
1016                     }
1017                     len -= GHASH_CHUNK;
1018                 }
1019                 if ((i = (len&(size_t)-16))) {
1020                     GHASH(ctx,in,i);
1021                     while (len>=16) {
1022                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
1023                         ++ctr;
1024                         if (is_endian.little)
1025                                 PUTU32(ctx->Yi.c+12,ctr);
1026                         else
1027                                 ctx->Yi.d[3] = ctr;
1028                         for (i=0; i<16; i+=sizeof(size_t))
1029                                 *(size_t *)(out+i) =
1030                                 *(size_t *)(in+i)^*(size_t *)(ctx->EKi.c+i);
1031                         out += 16;
1032                         in  += 16;
1033                         len -= 16;
1034                     }
1035                 }
1036 #else
1037                 while (len>=16) {
1038                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
1039                         ++ctr;
1040                         if (is_endian.little)
1041                                 PUTU32(ctx->Yi.c+12,ctr);
1042                         else
1043                                 ctx->Yi.d[3] = ctr;
1044                         for (i=0; i<16; i+=sizeof(size_t)) {
1045                                 size_t c = *(size_t *)(in+i);
1046                                 *(size_t *)(out+i) = c^*(size_t *)(ctx->EKi.c+i);
1047                                 *(size_t *)(ctx->Xi.c+i) ^= c;
1048                         }
1049                         GCM_MUL(ctx,Xi);
1050                         out += 16;
1051                         in  += 16;
1052                         len -= 16;
1053                 }
1054 #endif
1055                 if (len) {
1056                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
1057                         ++ctr;
1058                         if (is_endian.little)
1059                                 PUTU32(ctx->Yi.c+12,ctr);
1060                         else
1061                                 ctx->Yi.d[3] = ctr;
1062                         while (len--) {
1063                                 u8 c = in[n];
1064                                 ctx->Xi.c[n] ^= c;
1065                                 out[n] = c^ctx->EKi.c[n];
1066                                 ++n;
1067                         }
1068                 }
1069
1070                 ctx->res = n;
1071                 return;
1072         } while(0);
1073 #endif
1074         for (i=0;i<len;++i) {
1075                 u8 c;
1076                 if (n==0) {
1077                         (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
1078                         ++ctr;
1079                         if (is_endian.little)
1080                                 PUTU32(ctx->Yi.c+12,ctr);
1081                         else
1082                                 ctx->Yi.d[3] = ctr;
1083                 }
1084                 c = in[i];
1085                 out[i] ^= ctx->EKi.c[n];
1086                 ctx->Xi.c[n] ^= c;
1087                 n = (n+1)%16;
1088                 if (n==0)
1089                         GCM_MUL(ctx,Xi);
1090         }
1091
1092         ctx->res = n;
1093 }
1094
1095 int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx,const unsigned char *tag,
1096                         size_t len)
1097 {
1098         const union { long one; char little; } is_endian = {1};
1099         u64 alen = ctx->len.u[0]<<3;
1100         u64 clen = ctx->len.u[1]<<3;
1101
1102         if (ctx->res)
1103                 GCM_MUL(ctx,Xi);
1104
1105         if (is_endian.little) {
1106 #ifdef BSWAP8
1107                 alen = BSWAP8(alen);
1108                 clen = BSWAP8(clen);
1109 #else
1110                 u8 *p = ctx->len.c;
1111
1112                 ctx->len.u[0] = alen;
1113                 ctx->len.u[1] = clen;
1114
1115                 alen = (u64)GETU32(p)  <<32|GETU32(p+4);
1116                 clen = (u64)GETU32(p+8)<<32|GETU32(p+12);
1117 #endif
1118         }
1119
1120         ctx->Xi.u[0] ^= alen;
1121         ctx->Xi.u[1] ^= clen;
1122         GCM_MUL(ctx,Xi);
1123
1124         ctx->Xi.u[0] ^= ctx->EK0.u[0];
1125         ctx->Xi.u[1] ^= ctx->EK0.u[1];
1126
1127         if (tag && len<=sizeof(ctx->Xi))
1128                 return memcmp(ctx->Xi.c,tag,len);
1129         else
1130                 return -1;
1131 }
1132
1133 GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block)
1134 {
1135         GCM128_CONTEXT *ret;
1136
1137         if ((ret = (GCM128_CONTEXT *)OPENSSL_malloc(sizeof(GCM128_CONTEXT))))
1138                 CRYPTO_gcm128_init(ret,key,block);
1139
1140         return ret;
1141 }
1142
1143 void CRYPTO_gcm128_release(GCM128_CONTEXT *ctx)
1144 {
1145         if (ctx) {
1146                 OPENSSL_cleanse(ctx,sizeof(*ctx));
1147                 OPENSSL_free(ctx);
1148         }
1149 }
1150
1151 #if defined(SELFTEST)
1152 #include <stdio.h>
1153 #include <openssl/aes.h>
1154
1155 /* Test Case 1 */
1156 static const u8 K1[16],
1157                 *P1=NULL,
1158                 *A1=NULL,
1159                 IV1[12],
1160                 *C1=NULL,
1161                 T1[]=  {0x58,0xe2,0xfc,0xce,0xfa,0x7e,0x30,0x61,0x36,0x7f,0x1d,0x57,0xa4,0xe7,0x45,0x5a};
1162
1163 /* Test Case 2 */
1164 #define K2 K1
1165 #define A2 A1
1166 #define IV2 IV1
1167 static const u8 P2[16],
1168                 C2[]=  {0x03,0x88,0xda,0xce,0x60,0xb6,0xa3,0x92,0xf3,0x28,0xc2,0xb9,0x71,0xb2,0xfe,0x78},
1169                 T2[]=  {0xab,0x6e,0x47,0xd4,0x2c,0xec,0x13,0xbd,0xf5,0x3a,0x67,0xb2,0x12,0x57,0xbd,0xdf};
1170
1171 /* Test Case 3 */
1172 #define A3 A2
1173 static const u8 K3[]=  {0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08},
1174                 P3[]=  {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
1175                         0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
1176                         0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
1177                         0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55},
1178                 IV3[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad,0xde,0xca,0xf8,0x88},
1179                 C3[]=  {0x42,0x83,0x1e,0xc2,0x21,0x77,0x74,0x24,0x4b,0x72,0x21,0xb7,0x84,0xd0,0xd4,0x9c,
1180                         0xe3,0xaa,0x21,0x2f,0x2c,0x02,0xa4,0xe0,0x35,0xc1,0x7e,0x23,0x29,0xac,0xa1,0x2e,
1181                         0x21,0xd5,0x14,0xb2,0x54,0x66,0x93,0x1c,0x7d,0x8f,0x6a,0x5a,0xac,0x84,0xaa,0x05,
1182                         0x1b,0xa3,0x0b,0x39,0x6a,0x0a,0xac,0x97,0x3d,0x58,0xe0,0x91,0x47,0x3f,0x59,0x85},
1183                 T3[]=  {0x4d,0x5c,0x2a,0xf3,0x27,0xcd,0x64,0xa6,0x2c,0xf3,0x5a,0xbd,0x2b,0xa6,0xfa,0xb4};
1184
1185 /* Test Case 4 */
1186 #define K4 K3
1187 #define IV4 IV3
1188 static const u8 P4[]=  {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
1189                         0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
1190                         0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
1191                         0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39},
1192                 A4[]=  {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
1193                         0xab,0xad,0xda,0xd2},
1194                 C4[]=  {0x42,0x83,0x1e,0xc2,0x21,0x77,0x74,0x24,0x4b,0x72,0x21,0xb7,0x84,0xd0,0xd4,0x9c,
1195                         0xe3,0xaa,0x21,0x2f,0x2c,0x02,0xa4,0xe0,0x35,0xc1,0x7e,0x23,0x29,0xac,0xa1,0x2e,
1196                         0x21,0xd5,0x14,0xb2,0x54,0x66,0x93,0x1c,0x7d,0x8f,0x6a,0x5a,0xac,0x84,0xaa,0x05,
1197                         0x1b,0xa3,0x0b,0x39,0x6a,0x0a,0xac,0x97,0x3d,0x58,0xe0,0x91},
1198                 T4[]=  {0x5b,0xc9,0x4f,0xbc,0x32,0x21,0xa5,0xdb,0x94,0xfa,0xe9,0x5a,0xe7,0x12,0x1a,0x47};
1199
1200 /* Test Case 5 */
1201 #define K5 K4
1202 #define P5 P4
1203 static const u8 A5[]=  {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
1204                         0xab,0xad,0xda,0xd2},
1205                 IV5[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
1206                 C5[]=  {0x61,0x35,0x3b,0x4c,0x28,0x06,0x93,0x4a,0x77,0x7f,0xf5,0x1f,0xa2,0x2a,0x47,0x55,
1207                         0x69,0x9b,0x2a,0x71,0x4f,0xcd,0xc6,0xf8,0x37,0x66,0xe5,0xf9,0x7b,0x6c,0x74,0x23,
1208                         0x73,0x80,0x69,0x00,0xe4,0x9f,0x24,0xb2,0x2b,0x09,0x75,0x44,0xd4,0x89,0x6b,0x42,
1209                         0x49,0x89,0xb5,0xe1,0xeb,0xac,0x0f,0x07,0xc2,0x3f,0x45,0x98},
1210                 T5[]=  {0x36,0x12,0xd2,0xe7,0x9e,0x3b,0x07,0x85,0x56,0x1b,0xe1,0x4a,0xac,0xa2,0xfc,0xcb};
1211
1212 /* Test Case 6 */
1213 #define K6 K5
1214 #define P6 P5
1215 #define A6 A5
1216 static const u8 IV6[]= {0x93,0x13,0x22,0x5d,0xf8,0x84,0x06,0xe5,0x55,0x90,0x9c,0x5a,0xff,0x52,0x69,0xaa,
1217                         0x6a,0x7a,0x95,0x38,0x53,0x4f,0x7d,0xa1,0xe4,0xc3,0x03,0xd2,0xa3,0x18,0xa7,0x28,
1218                         0xc3,0xc0,0xc9,0x51,0x56,0x80,0x95,0x39,0xfc,0xf0,0xe2,0x42,0x9a,0x6b,0x52,0x54,
1219                         0x16,0xae,0xdb,0xf5,0xa0,0xde,0x6a,0x57,0xa6,0x37,0xb3,0x9b},
1220                 C6[]=  {0x8c,0xe2,0x49,0x98,0x62,0x56,0x15,0xb6,0x03,0xa0,0x33,0xac,0xa1,0x3f,0xb8,0x94,
1221                         0xbe,0x91,0x12,0xa5,0xc3,0xa2,0x11,0xa8,0xba,0x26,0x2a,0x3c,0xca,0x7e,0x2c,0xa7,
1222                         0x01,0xe4,0xa9,0xa4,0xfb,0xa4,0x3c,0x90,0xcc,0xdc,0xb2,0x81,0xd4,0x8c,0x7c,0x6f,
1223                         0xd6,0x28,0x75,0xd2,0xac,0xa4,0x17,0x03,0x4c,0x34,0xae,0xe5},
1224                 T6[]=  {0x61,0x9c,0xc5,0xae,0xff,0xfe,0x0b,0xfa,0x46,0x2a,0xf4,0x3c,0x16,0x99,0xd0,0x50};
1225
1226 /* Test Case 7 */
1227 static const u8 K7[24],
1228                 *P7=NULL,
1229                 *A7=NULL,
1230                 IV7[12],
1231                 *C7=NULL,
1232                 T7[]=  {0xcd,0x33,0xb2,0x8a,0xc7,0x73,0xf7,0x4b,0xa0,0x0e,0xd1,0xf3,0x12,0x57,0x24,0x35};
1233
1234 /* Test Case 8 */
1235 #define K8 K7
1236 #define IV8 IV7
1237 #define A8 A7
1238 static const u8 P8[16],
1239                 C8[]=  {0x98,0xe7,0x24,0x7c,0x07,0xf0,0xfe,0x41,0x1c,0x26,0x7e,0x43,0x84,0xb0,0xf6,0x00},
1240                 T8[]=  {0x2f,0xf5,0x8d,0x80,0x03,0x39,0x27,0xab,0x8e,0xf4,0xd4,0x58,0x75,0x14,0xf0,0xfb};
1241
1242 /* Test Case 9 */
1243 #define A9 A8
1244 static const u8 K9[]=  {0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08,
1245                         0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c},
1246                 P9[]=  {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
1247                         0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
1248                         0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
1249                         0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55},
1250                 IV9[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad,0xde,0xca,0xf8,0x88},
1251                 C9[]=  {0x39,0x80,0xca,0x0b,0x3c,0x00,0xe8,0x41,0xeb,0x06,0xfa,0xc4,0x87,0x2a,0x27,0x57,
1252                         0x85,0x9e,0x1c,0xea,0xa6,0xef,0xd9,0x84,0x62,0x85,0x93,0xb4,0x0c,0xa1,0xe1,0x9c,
1253                         0x7d,0x77,0x3d,0x00,0xc1,0x44,0xc5,0x25,0xac,0x61,0x9d,0x18,0xc8,0x4a,0x3f,0x47,
1254                         0x18,0xe2,0x44,0x8b,0x2f,0xe3,0x24,0xd9,0xcc,0xda,0x27,0x10,0xac,0xad,0xe2,0x56},
1255                 T9[]=  {0x99,0x24,0xa7,0xc8,0x58,0x73,0x36,0xbf,0xb1,0x18,0x02,0x4d,0xb8,0x67,0x4a,0x14};
1256
1257 /* Test Case 10 */
1258 #define K10 K9
1259 #define IV10 IV9
1260 static const u8 P10[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
1261                         0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
1262                         0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
1263                         0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39},
1264                 A10[]= {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
1265                         0xab,0xad,0xda,0xd2},
1266                 C10[]= {0x39,0x80,0xca,0x0b,0x3c,0x00,0xe8,0x41,0xeb,0x06,0xfa,0xc4,0x87,0x2a,0x27,0x57,
1267                         0x85,0x9e,0x1c,0xea,0xa6,0xef,0xd9,0x84,0x62,0x85,0x93,0xb4,0x0c,0xa1,0xe1,0x9c,
1268                         0x7d,0x77,0x3d,0x00,0xc1,0x44,0xc5,0x25,0xac,0x61,0x9d,0x18,0xc8,0x4a,0x3f,0x47,
1269                         0x18,0xe2,0x44,0x8b,0x2f,0xe3,0x24,0xd9,0xcc,0xda,0x27,0x10},
1270                 T10[]= {0x25,0x19,0x49,0x8e,0x80,0xf1,0x47,0x8f,0x37,0xba,0x55,0xbd,0x6d,0x27,0x61,0x8c};
1271
1272 /* Test Case 11 */
1273 #define K11 K10
1274 #define P11 P10
1275 #define A11 A10
1276 static const u8 IV11[]={0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
1277                 C11[]= {0x0f,0x10,0xf5,0x99,0xae,0x14,0xa1,0x54,0xed,0x24,0xb3,0x6e,0x25,0x32,0x4d,0xb8,
1278                         0xc5,0x66,0x63,0x2e,0xf2,0xbb,0xb3,0x4f,0x83,0x47,0x28,0x0f,0xc4,0x50,0x70,0x57,
1279                         0xfd,0xdc,0x29,0xdf,0x9a,0x47,0x1f,0x75,0xc6,0x65,0x41,0xd4,0xd4,0xda,0xd1,0xc9,
1280                         0xe9,0x3a,0x19,0xa5,0x8e,0x8b,0x47,0x3f,0xa0,0xf0,0x62,0xf7},
1281                 T11[]= {0x65,0xdc,0xc5,0x7f,0xcf,0x62,0x3a,0x24,0x09,0x4f,0xcc,0xa4,0x0d,0x35,0x33,0xf8};
1282
1283 /* Test Case 12 */
1284 #define K12 K11
1285 #define P12 P11
1286 #define A12 A11
1287 static const u8 IV12[]={0x93,0x13,0x22,0x5d,0xf8,0x84,0x06,0xe5,0x55,0x90,0x9c,0x5a,0xff,0x52,0x69,0xaa,
1288                         0x6a,0x7a,0x95,0x38,0x53,0x4f,0x7d,0xa1,0xe4,0xc3,0x03,0xd2,0xa3,0x18,0xa7,0x28,
1289                         0xc3,0xc0,0xc9,0x51,0x56,0x80,0x95,0x39,0xfc,0xf0,0xe2,0x42,0x9a,0x6b,0x52,0x54,
1290                         0x16,0xae,0xdb,0xf5,0xa0,0xde,0x6a,0x57,0xa6,0x37,0xb3,0x9b},
1291                 C12[]= {0xd2,0x7e,0x88,0x68,0x1c,0xe3,0x24,0x3c,0x48,0x30,0x16,0x5a,0x8f,0xdc,0xf9,0xff,
1292                         0x1d,0xe9,0xa1,0xd8,0xe6,0xb4,0x47,0xef,0x6e,0xf7,0xb7,0x98,0x28,0x66,0x6e,0x45,
1293                         0x81,0xe7,0x90,0x12,0xaf,0x34,0xdd,0xd9,0xe2,0xf0,0x37,0x58,0x9b,0x29,0x2d,0xb3,
1294                         0xe6,0x7c,0x03,0x67,0x45,0xfa,0x22,0xe7,0xe9,0xb7,0x37,0x3b},
1295                 T12[]= {0xdc,0xf5,0x66,0xff,0x29,0x1c,0x25,0xbb,0xb8,0x56,0x8f,0xc3,0xd3,0x76,0xa6,0xd9};
1296
1297 /* Test Case 13 */
1298 static const u8 K13[32],
1299                 *P13=NULL,
1300                 *A13=NULL,
1301                 IV13[12],
1302                 *C13=NULL,
1303                 T13[]={0x53,0x0f,0x8a,0xfb,0xc7,0x45,0x36,0xb9,0xa9,0x63,0xb4,0xf1,0xc4,0xcb,0x73,0x8b};
1304
1305 /* Test Case 14 */
1306 #define K14 K13
1307 #define A14 A13
1308 static const u8 P14[16],
1309                 IV14[12],
1310                 C14[]= {0xce,0xa7,0x40,0x3d,0x4d,0x60,0x6b,0x6e,0x07,0x4e,0xc5,0xd3,0xba,0xf3,0x9d,0x18},
1311                 T14[]= {0xd0,0xd1,0xc8,0xa7,0x99,0x99,0x6b,0xf0,0x26,0x5b,0x98,0xb5,0xd4,0x8a,0xb9,0x19};
1312
1313 /* Test Case 15 */
1314 #define A15 A14
1315 static const u8 K15[]= {0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08,
1316                         0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08},
1317                 P15[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
1318                         0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
1319                         0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
1320                         0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55},
1321                 IV15[]={0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad,0xde,0xca,0xf8,0x88},
1322                 C15[]= {0x52,0x2d,0xc1,0xf0,0x99,0x56,0x7d,0x07,0xf4,0x7f,0x37,0xa3,0x2a,0x84,0x42,0x7d,
1323                         0x64,0x3a,0x8c,0xdc,0xbf,0xe5,0xc0,0xc9,0x75,0x98,0xa2,0xbd,0x25,0x55,0xd1,0xaa,
1324                         0x8c,0xb0,0x8e,0x48,0x59,0x0d,0xbb,0x3d,0xa7,0xb0,0x8b,0x10,0x56,0x82,0x88,0x38,
1325                         0xc5,0xf6,0x1e,0x63,0x93,0xba,0x7a,0x0a,0xbc,0xc9,0xf6,0x62,0x89,0x80,0x15,0xad},
1326                 T15[]= {0xb0,0x94,0xda,0xc5,0xd9,0x34,0x71,0xbd,0xec,0x1a,0x50,0x22,0x70,0xe3,0xcc,0x6c};
1327
1328 /* Test Case 16 */
1329 #define K16 K15
1330 #define IV16 IV15
1331 static const u8 P16[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
1332                         0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
1333                         0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
1334                         0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39},
1335                 A16[]= {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
1336                         0xab,0xad,0xda,0xd2},
1337                 C16[]= {0x52,0x2d,0xc1,0xf0,0x99,0x56,0x7d,0x07,0xf4,0x7f,0x37,0xa3,0x2a,0x84,0x42,0x7d,
1338                         0x64,0x3a,0x8c,0xdc,0xbf,0xe5,0xc0,0xc9,0x75,0x98,0xa2,0xbd,0x25,0x55,0xd1,0xaa,
1339                         0x8c,0xb0,0x8e,0x48,0x59,0x0d,0xbb,0x3d,0xa7,0xb0,0x8b,0x10,0x56,0x82,0x88,0x38,
1340                         0xc5,0xf6,0x1e,0x63,0x93,0xba,0x7a,0x0a,0xbc,0xc9,0xf6,0x62},
1341                 T16[]= {0x76,0xfc,0x6e,0xce,0x0f,0x4e,0x17,0x68,0xcd,0xdf,0x88,0x53,0xbb,0x2d,0x55,0x1b};
1342
1343 /* Test Case 17 */
1344 #define K17 K16
1345 #define P17 P16
1346 #define A17 A16
1347 static const u8 IV17[]={0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
1348                 C17[]= {0xc3,0x76,0x2d,0xf1,0xca,0x78,0x7d,0x32,0xae,0x47,0xc1,0x3b,0xf1,0x98,0x44,0xcb,
1349                         0xaf,0x1a,0xe1,0x4d,0x0b,0x97,0x6a,0xfa,0xc5,0x2f,0xf7,0xd7,0x9b,0xba,0x9d,0xe0,
1350                         0xfe,0xb5,0x82,0xd3,0x39,0x34,0xa4,0xf0,0x95,0x4c,0xc2,0x36,0x3b,0xc7,0x3f,0x78,
1351                         0x62,0xac,0x43,0x0e,0x64,0xab,0xe4,0x99,0xf4,0x7c,0x9b,0x1f},
1352                 T17[]= {0x3a,0x33,0x7d,0xbf,0x46,0xa7,0x92,0xc4,0x5e,0x45,0x49,0x13,0xfe,0x2e,0xa8,0xf2};
1353
1354 /* Test Case 18 */
1355 #define K18 K17
1356 #define P18 P17
1357 #define A18 A17
1358 static const u8 IV18[]={0x93,0x13,0x22,0x5d,0xf8,0x84,0x06,0xe5,0x55,0x90,0x9c,0x5a,0xff,0x52,0x69,0xaa,
1359                         0x6a,0x7a,0x95,0x38,0x53,0x4f,0x7d,0xa1,0xe4,0xc3,0x03,0xd2,0xa3,0x18,0xa7,0x28,
1360                         0xc3,0xc0,0xc9,0x51,0x56,0x80,0x95,0x39,0xfc,0xf0,0xe2,0x42,0x9a,0x6b,0x52,0x54,
1361                         0x16,0xae,0xdb,0xf5,0xa0,0xde,0x6a,0x57,0xa6,0x37,0xb3,0x9b},
1362                 C18[]= {0x5a,0x8d,0xef,0x2f,0x0c,0x9e,0x53,0xf1,0xf7,0x5d,0x78,0x53,0x65,0x9e,0x2a,0x20,
1363                         0xee,0xb2,0xb2,0x2a,0xaf,0xde,0x64,0x19,0xa0,0x58,0xab,0x4f,0x6f,0x74,0x6b,0xf4,
1364                         0x0f,0xc0,0xc3,0xb7,0x80,0xf2,0x44,0x45,0x2d,0xa3,0xeb,0xf1,0xc5,0xd8,0x2c,0xde,
1365                         0xa2,0x41,0x89,0x97,0x20,0x0e,0xf8,0x2e,0x44,0xae,0x7e,0x3f},
1366                 T18[]= {0xa4,0x4a,0x82,0x66,0xee,0x1c,0x8e,0xb0,0xc8,0xb5,0xd4,0xcf,0x5a,0xe9,0xf1,0x9a};
1367
1368 #define TEST_CASE(n)    do {                                    \
1369         u8 out[sizeof(P##n)];                                   \
1370         AES_set_encrypt_key(K##n,sizeof(K##n)*8,&key);          \
1371         CRYPTO_gcm128_init(&ctx,&key,(block128_f)AES_encrypt);  \
1372         CRYPTO_gcm128_setiv(&ctx,IV##n,sizeof(IV##n));          \
1373         if (A##n) CRYPTO_gcm128_aad(&ctx,A##n,sizeof(A##n));    \
1374         if (P##n) CRYPTO_gcm128_encrypt(&ctx,P##n,out,sizeof(out));     \
1375         if (CRYPTO_gcm128_finish(&ctx,T##n,16) ||               \
1376             (C##n && memcmp(out,C##n,sizeof(out))))             \
1377                 ret++, printf ("encrypt test#%d failed.\n",n);\
1378         CRYPTO_gcm128_setiv(&ctx,IV##n,sizeof(IV##n));          \
1379         if (A##n) CRYPTO_gcm128_aad(&ctx,A##n,sizeof(A##n));    \
1380         if (C##n) CRYPTO_gcm128_decrypt(&ctx,C##n,out,sizeof(out));     \
1381         if (CRYPTO_gcm128_finish(&ctx,T##n,16) ||               \
1382             (P##n && memcmp(out,P##n,sizeof(out))))             \
1383                 ret++, printf ("decrypt test#%d failed.\n",n);  \
1384         } while(0)
1385
1386 int main()
1387 {
1388         GCM128_CONTEXT ctx;
1389         AES_KEY key;
1390         int ret=0;
1391
1392         TEST_CASE(1);
1393         TEST_CASE(2);
1394         TEST_CASE(3);
1395         TEST_CASE(4);
1396         TEST_CASE(5);
1397         TEST_CASE(6);
1398         TEST_CASE(7);
1399         TEST_CASE(8);
1400         TEST_CASE(9);
1401         TEST_CASE(10);
1402         TEST_CASE(11);
1403         TEST_CASE(12);
1404         TEST_CASE(13);
1405         TEST_CASE(14);
1406         TEST_CASE(15);
1407         TEST_CASE(16);
1408         TEST_CASE(17);
1409         TEST_CASE(18);
1410
1411 #ifdef OPENSSL_CPUID_OBJ
1412         {
1413         size_t start,stop,gcm_t,ctr_t,OPENSSL_rdtsc();
1414         union { u64 u; u8 c[1024]; } buf;
1415         int i;
1416
1417         AES_set_encrypt_key(K1,sizeof(K1)*8,&key);
1418         CRYPTO_gcm128_init(&ctx,&key,(block128_f)AES_encrypt);
1419         CRYPTO_gcm128_setiv(&ctx,IV1,sizeof(IV1));
1420
1421         CRYPTO_gcm128_encrypt(&ctx,buf.c,buf.c,sizeof(buf));
1422         start = OPENSSL_rdtsc();
1423         CRYPTO_gcm128_encrypt(&ctx,buf.c,buf.c,sizeof(buf));
1424         gcm_t = OPENSSL_rdtsc() - start;
1425
1426         CRYPTO_ctr128_encrypt(buf.c,buf.c,sizeof(buf),
1427                         &key,ctx.Yi.c,ctx.EKi.c,&ctx.res,
1428                         (block128_f)AES_encrypt);
1429         start = OPENSSL_rdtsc();
1430         CRYPTO_ctr128_encrypt(buf.c,buf.c,sizeof(buf),
1431                         &key,ctx.Yi.c,ctx.EKi.c,&ctx.res,
1432                         (block128_f)AES_encrypt);
1433         ctr_t = OPENSSL_rdtsc() - start;
1434
1435         printf("%.2f-%.2f=%.2f\n",
1436                         gcm_t/(double)sizeof(buf),
1437                         ctr_t/(double)sizeof(buf),
1438                         (gcm_t-ctr_t)/(double)sizeof(buf));
1439 #ifdef GHASH
1440         GHASH(&ctx,buf.c,sizeof(buf));
1441         start = OPENSSL_rdtsc();
1442         for (i=0;i<100;++i) GHASH(&ctx,buf.c,sizeof(buf));
1443         gcm_t = OPENSSL_rdtsc() - start;
1444         printf("%.2f\n",gcm_t/(double)sizeof(buf)/(double)i);
1445 #endif
1446         }
1447 #endif
1448
1449         return ret;
1450 }
1451 #endif