Crypto++ 8.2 Free C++ class library of cryptographic schemes

gcm_simd.cpp
1 // gcm_simd.cpp - written and placed in the public domain by
2 // Jeffrey Walton, Uri Blumenthal and Marcel Raad.
3 // Original x86 CLMUL by Wei Dai. ARM and POWER8
4 // PMULL and VMULL by JW, UB and MR.
5 //
6 // This source file uses intrinsics to gain access to SSE4.2 and
7 // ARMv8a CRC-32 and CRC-32C instructions. A separate source file
8 // is needed because additional CXXFLAGS are required to enable
9 // the appropriate instructions sets in some build configurations.
10
11 #include "pch.h"
12 #include "config.h"
13 #include "misc.h"
14
15 #if defined(CRYPTOPP_DISABLE_GCM_ASM)
16 # undef CRYPTOPP_X86_ASM_AVAILABLE
17 # undef CRYPTOPP_X32_ASM_AVAILABLE
18 # undef CRYPTOPP_X64_ASM_AVAILABLE
19 # undef CRYPTOPP_SSE2_ASM_AVAILABLE
20 #endif
21
22 #if (CRYPTOPP_SSE2_INTRIN_AVAILABLE)
23 # include <emmintrin.h>
24 # include <xmmintrin.h>
25 #endif
26
27 #if (CRYPTOPP_CLMUL_AVAILABLE)
28 # include <tmmintrin.h>
29 # include <wmmintrin.h>
30 #endif
31
32 #if (CRYPTOPP_ARM_NEON_HEADER)
33 # include <arm_neon.h>
34 #endif
35
36 #if (CRYPTOPP_ARM_ACLE_HEADER)
37 # include <stdint.h>
38 # include <arm_acle.h>
39 #endif
40
41 #if defined(CRYPTOPP_ARM_PMULL_AVAILABLE)
42 # include "arm_simd.h"
43 #endif
44
45 #if defined(CRYPTOPP_ALTIVEC_AVAILABLE)
46 # include "ppc_simd.h"
47 #endif
48
49 #ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
50 # include <signal.h>
51 # include <setjmp.h>
52 #endif
53
54 #ifndef EXCEPTION_EXECUTE_HANDLER
55 # define EXCEPTION_EXECUTE_HANDLER 1
56 #endif
57
58 // Clang intrinsic casts, http://bugs.llvm.org/show_bug.cgi?id=20670
59 #define M128_CAST(x) ((__m128i *)(void *)(x))
60 #define CONST_M128_CAST(x) ((const __m128i *)(const void *)(x))
61
62 // Squash MS LNK4221 and libtool warnings
63 extern const char GCM_SIMD_FNAME[] = __FILE__;
64
65 NAMESPACE_BEGIN(CryptoPP)
66
67 // ************************* Feature Probes ************************* //
68
69 #ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
70 extern "C" {
71 typedef void (*SigHandler)(int);
72
73 static jmp_buf s_jmpSIGILL;
74 static void SigIllHandler(int)
75 {
76 longjmp(s_jmpSIGILL, 1);
77 }
78 }
79 #endif // Not CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
80
81 #if (CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARMV8)
82 bool CPU_ProbePMULL()
83 {
84 #if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
85 return false;
86 #elif (CRYPTOPP_ARM_PMULL_AVAILABLE)
87 # if defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
88 volatile bool result = true;
89 __try
90 {
91 // Linaro is missing a lot of pmull gear. Also see http://github.com/weidai11/cryptopp/issues/233.
92 const uint64_t wa1[]={0,0x9090909090909090}, wb1[]={0,0xb0b0b0b0b0b0b0b0};
93 const uint64x2_t a1=vld1q_u64(wa1), b1=vld1q_u64(wb1);
94
95 const uint8_t wa2[]={0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
96 0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0},
97 wb2[]={0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,
98 0xe0,0xe0,0xe0,0xe0,0xe0,0xe0,0xe0,0xe0};
99 const uint8x16_t a2=vld1q_u8(wa2), b2=vld1q_u8(wb2);
100
101 const uint64x2_t r1 = PMULL_00(a1, b1);
102 const uint64x2_t r2 = PMULL_11(vreinterpretq_u64_u8(a2),
103 vreinterpretq_u64_u8(b2));
104
105 result = !!(vgetq_lane_u64(r1,0) == 0x5300530053005300 &&
106 vgetq_lane_u64(r1,1) == 0x5300530053005300 &&
107 vgetq_lane_u64(r2,0) == 0x6c006c006c006c00 &&
108 vgetq_lane_u64(r2,1) == 0x6c006c006c006c00);
109 }
110 __except (EXCEPTION_EXECUTE_HANDLER)
111 {
112 return false;
113 }
114 return result;
115 # else
116
117 // longjmp and clobber warnings. Volatile is required.
118 volatile bool result = true;
119
120 volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
121 if (oldHandler == SIG_ERR)
122 return false;
123
124 volatile sigset_t oldMask;
125 if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
126 {
127 signal(SIGILL, oldHandler);
128 return false;
129 }
130
131 if (setjmp(s_jmpSIGILL))
132 result = false;
133 else
134 {
135 // Linaro is missing a lot of pmull gear. Also see http://github.com/weidai11/cryptopp/issues/233.
136 const uint64_t wa1[]={0,0x9090909090909090}, wb1[]={0,0xb0b0b0b0b0b0b0b0};
137 const uint64x2_t a1=vld1q_u64(wa1), b1=vld1q_u64(wb1);
138
139 const uint8_t wa2[]={0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
140 0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0},
141 wb2[]={0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,
142 0xe0,0xe0,0xe0,0xe0,0xe0,0xe0,0xe0,0xe0};
143 const uint8x16_t a2=vld1q_u8(wa2), b2=vld1q_u8(wb2);
144
145 const uint64x2_t r1 = PMULL_00(a1, b1);
146 const uint64x2_t r2 = PMULL_11(vreinterpretq_u64_u8(a2),
147 vreinterpretq_u64_u8(b2));
148
149 result = !!(vgetq_lane_u64(r1,0) == 0x5300530053005300 &&
150 vgetq_lane_u64(r1,1) == 0x5300530053005300 &&
151 vgetq_lane_u64(r2,0) == 0x6c006c006c006c00 &&
152 vgetq_lane_u64(r2,1) == 0x6c006c006c006c00);
153 }
154
155 sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
156 signal(SIGILL, oldHandler);
157 return result;
158 # endif
159 #else
160 return false;
161 #endif // CRYPTOPP_ARM_PMULL_AVAILABLE
162 }
163 #endif // ARM32 or ARM64
164
165 #if (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
166 bool CPU_ProbePMULL()
167 {
168 #if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
169 return false;
170 #elif (CRYPTOPP_POWER8_VMULL_AVAILABLE)
171 // longjmp and clobber warnings. Volatile is required.
172 volatile bool result = true;
173
174 volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
175 if (oldHandler == SIG_ERR)
176 return false;
177
178 volatile sigset_t oldMask;
179 if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
180 {
181 signal(SIGILL, oldHandler);
182 return false;
183 }
184
185 if (setjmp(s_jmpSIGILL))
186 result = false;
187 else
188 {
189 const uint64_t wa1[]={0,W64LIT(0x9090909090909090)},
190 wb1[]={0,W64LIT(0xb0b0b0b0b0b0b0b0)};
191 const uint64x2_p a1=VecLoad(wa1), b1=VecLoad(wb1);
192
193 const uint8_t wa2[]={0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
194 0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0},
195 wb2[]={0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,
196 0xe0,0xe0,0xe0,0xe0,0xe0,0xe0,0xe0,0xe0};
197 const uint32x4_p a2=VecLoad(wa2), b2=VecLoad(wb2);
198
199 const uint64x2_p r1 = VecIntelMultiply11(a1, b1);
200 const uint64x2_p r2 = VecIntelMultiply11((uint64x2_p)a2, (uint64x2_p)b2);
201
202 const uint64_t wc1[]={W64LIT(0x5300530053005300), W64LIT(0x5300530053005300)},
203 wc2[]={W64LIT(0x6c006c006c006c00), W64LIT(0x6c006c006c006c00)};
204 const uint64x2_p c1=VecLoad(wc1), c2=VecLoad(wc2);
205
206 result = !!(VecEqual(r1, c1) && VecEqual(r2, c2));
207 }
208
209 sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
210 signal(SIGILL, oldHandler);
211 return result;
212 #else
213 return false;
214 #endif // CRYPTOPP_POWER8_VMULL_AVAILABLE
215 }
216 #endif // PPC32 or PPC64
217
218 // *************************** ARM NEON *************************** //
219
220 #if CRYPTOPP_ARM_NEON_AVAILABLE
221 void GCM_Xor16_NEON(byte *a, const byte *b, const byte *c)
222 {
223 vst1q_u8(a, veorq_u8(vld1q_u8(b), vld1q_u8(c)));
224 }
225 #endif // CRYPTOPP_ARM_NEON_AVAILABLE
226
227 #if CRYPTOPP_ARM_PMULL_AVAILABLE
228
229 // Swaps high and low 64-bit words
230 inline uint64x2_t SwapWords(const uint64x2_t& data)
231 {
232 return (uint64x2_t)vcombine_u64(
233 vget_high_u64(data), vget_low_u64(data));
234 }
235
236 uint64x2_t GCM_Reduce_PMULL(uint64x2_t c0, uint64x2_t c1, uint64x2_t c2, const uint64x2_t &r)
237 {
238 c1 = veorq_u64(c1, VEXT_U8<8>(vdupq_n_u64(0), c0));
239 c1 = veorq_u64(c1, PMULL_01(c0, r));
240 c0 = VEXT_U8<8>(c0, vdupq_n_u64(0));
241 c0 = vshlq_n_u64(veorq_u64(c0, c1), 1);
242 c0 = PMULL_00(c0, r);
243 c2 = veorq_u64(c2, c0);
244 c2 = veorq_u64(c2, VEXT_U8<8>(c1, vdupq_n_u64(0)));
245 c1 = vshrq_n_u64(vcombine_u64(vget_low_u64(c1), vget_low_u64(c2)), 63);
246 c2 = vshlq_n_u64(c2, 1);
247
248 return veorq_u64(c2, c1);
249 }
250
251 uint64x2_t GCM_Multiply_PMULL(const uint64x2_t &x, const uint64x2_t &h, const uint64x2_t &r)
252 {
253 const uint64x2_t c0 = PMULL_00(x, h);
254 const uint64x2_t c1 = veorq_u64(PMULL_10(x, h), PMULL_01(x, h));
255 const uint64x2_t c2 = PMULL_11(x, h);
256
257 return GCM_Reduce_PMULL(c0, c1, c2, r);
258 }
259
260 void GCM_SetKeyWithoutResync_PMULL(const byte *hashKey, byte *mulTable, unsigned int tableSize)
261 {
262 const uint64x2_t r = {0xe100000000000000ull, 0xc200000000000000ull};
263 const uint64x2_t t = vreinterpretq_u64_u8(vrev64q_u8(vld1q_u8(hashKey)));
264 const uint64x2_t h0 = vextq_u64(t, t, 1);
265
266 uint64x2_t h = h0;
267 unsigned int i;
268 for (i=0; i<tableSize-32; i+=32)
269 {
270 const uint64x2_t h1 = GCM_Multiply_PMULL(h, h0, r);
271 vst1_u64((uint64_t *)(mulTable+i), vget_low_u64(h));
272 vst1q_u64((uint64_t *)(mulTable+i+16), h1);
273 vst1q_u64((uint64_t *)(mulTable+i+8), h);
274 vst1_u64((uint64_t *)(mulTable+i+8), vget_low_u64(h1));
275 h = GCM_Multiply_PMULL(h1, h0, r);
276 }
277
278 const uint64x2_t h1 = GCM_Multiply_PMULL(h, h0, r);
279 vst1_u64((uint64_t *)(mulTable+i), vget_low_u64(h));
280 vst1q_u64((uint64_t *)(mulTable+i+16), h1);
281 vst1q_u64((uint64_t *)(mulTable+i+8), h);
282 vst1_u64((uint64_t *)(mulTable+i+8), vget_low_u64(h1));
283 }
284
285 size_t GCM_AuthenticateBlocks_PMULL(const byte *data, size_t len, const byte *mtable, byte *hbuffer)
286 {
287 const uint64x2_t r = {0xe100000000000000ull, 0xc200000000000000ull};
288 uint64x2_t x = vreinterpretq_u64_u8(vld1q_u8(hbuffer));
289
290 while (len >= 16)
291 {
292 size_t i=0, s = UnsignedMin(len/16U, 8U);
293 uint64x2_t d1, d2 = vreinterpretq_u64_u8(vrev64q_u8(vld1q_u8(data+(s-1)*16U)));
294 uint64x2_t c0 = vdupq_n_u64(0);
295 uint64x2_t c1 = vdupq_n_u64(0);
296 uint64x2_t c2 = vdupq_n_u64(0);
297
298 while (true)
299 {
300 const uint64x2_t h0 = vld1q_u64((const uint64_t*)(mtable+(i+0)*16));
301 const uint64x2_t h1 = vld1q_u64((const uint64_t*)(mtable+(i+1)*16));
302 const uint64x2_t h2 = veorq_u64(h0, h1);
303
304 if (++i == s)
305 {
306 const uint64x2_t t1 = vreinterpretq_u64_u8(vrev64q_u8(vld1q_u8(data)));
307 d1 = veorq_u64(vextq_u64(t1, t1, 1), x);
308 c0 = veorq_u64(c0, PMULL_00(d1, h0));
309 c2 = veorq_u64(c2, PMULL_10(d1, h1));
310 d1 = veorq_u64(d1, SwapWords(d1));
311 c1 = veorq_u64(c1, PMULL_00(d1, h2));
312
313 break;
314 }
315
316 d1 = vreinterpretq_u64_u8(vrev64q_u8(vld1q_u8(data+(s-i)*16-8)));
317 c0 = veorq_u64(c0, PMULL_10(d2, h0));
318 c2 = veorq_u64(c2, PMULL_10(d1, h1));
319 d2 = veorq_u64(d2, d1);
320 c1 = veorq_u64(c1, PMULL_10(d2, h2));
321
322 if (++i == s)
323 {
324 const uint64x2_t t2 = vreinterpretq_u64_u8(vrev64q_u8(vld1q_u8(data)));
325 d1 = veorq_u64(vextq_u64(t2, t2, 1), x);
326 c0 = veorq_u64(c0, PMULL_01(d1, h0));
327 c2 = veorq_u64(c2, PMULL_11(d1, h1));
328 d1 = veorq_u64(d1, SwapWords(d1));
329 c1 = veorq_u64(c1, PMULL_01(d1, h2));
330
331 break;
332 }
333
334 const uint64x2_t t3 = vreinterpretq_u64_u8(vrev64q_u8(vld1q_u8(data+(s-i)*16-8)));
335 d2 = vextq_u64(t3, t3, 1);
336 c0 = veorq_u64(c0, PMULL_01(d1, h0));
337 c2 = veorq_u64(c2, PMULL_01(d2, h1));
338 d1 = veorq_u64(d1, d2);
339 c1 = veorq_u64(c1, PMULL_01(d1, h2));
340 }
341 data += s*16;
342 len -= s*16;
343
344 c1 = veorq_u64(veorq_u64(c1, c0), c2);
345 x = GCM_Reduce_PMULL(c0, c1, c2, r);
346 }
347
348 vst1q_u64(reinterpret_cast<uint64_t *>(hbuffer), x);
349 return len;
350 }
351
352 void GCM_ReverseHashBufferIfNeeded_PMULL(byte *hashBuffer)
353 {
354 if (GetNativeByteOrder() != BIG_ENDIAN_ORDER)
355 {
356 const uint8x16_t x = vrev64q_u8(vld1q_u8(hashBuffer));
357 vst1q_u8(hashBuffer, vextq_u8(x, x, 8));
358 }
359 }
360 #endif // CRYPTOPP_ARM_PMULL_AVAILABLE
361
362 // ***************************** SSE ***************************** //
363
364 #if CRYPTOPP_SSE2_INTRIN_AVAILABLE || CRYPTOPP_SSE2_ASM_AVAILABLE
365 // SunCC 5.10-5.11 compiler crash. Move GCM_Xor16_SSE2 out-of-line, and place in
366 // a source file with a SSE architecture switch. Also see GH #226 and GH #284.
367 void GCM_Xor16_SSE2(byte *a, const byte *b, const byte *c)
368 {
369 # if CRYPTOPP_SSE2_ASM_AVAILABLE && defined(__GNUC__)
370 asm ("movdqa %1, %%xmm0; pxor %2, %%xmm0; movdqa %%xmm0, %0;"
371 : "=m" (a[0]) : "m"(b[0]), "m"(c[0]));
372 # else // CRYPTOPP_SSE2_INTRIN_AVAILABLE
373 _mm_store_si128(M128_CAST(a), _mm_xor_si128(
374 _mm_load_si128(CONST_M128_CAST(b)),
375 _mm_load_si128(CONST_M128_CAST(c))));
376 # endif
377 }
378 #endif // CRYPTOPP_SSE2_ASM_AVAILABLE
379
380 #if CRYPTOPP_CLMUL_AVAILABLE
381
382 #if 0
383 // preserved for testing
384 void gcm_gf_mult(const unsigned char *a, const unsigned char *b, unsigned char *c)
385 {
386 word64 Z0=0, Z1=0, V0, V1;
387
388 typedef BlockGetAndPut<word64, BigEndian> Block;
389 Block::Get(a)(V0)(V1);
390
391 for (int i=0; i<16; i++)
392 {
393 for (int j=0x80; j!=0; j>>=1)
394 {
395 int x = b[i] & j;
396 Z0 ^= x ? V0 : 0;
397 Z1 ^= x ? V1 : 0;
398 x = (int)V1 & 1;
399 V1 = (V1>>1) | (V0<<63);
400 V0 = (V0>>1) ^ (x ? W64LIT(0xe1) << 56 : 0);
401 }
402 }
403 Block::Put(NULLPTR, c)(Z0)(Z1);
404 }
405
406 __m128i _mm_clmulepi64_si128(const __m128i &a, const __m128i &b, int i)
407 {
408 word64 A[1] = {ByteReverse(((word64*)&a)[i&1])};
409 word64 B[1] = {ByteReverse(((word64*)&b)[i>>4])};
410
411 PolynomialMod2 pa((byte *)A, 8);
412 PolynomialMod2 pb((byte *)B, 8);
413 PolynomialMod2 c = pa*pb;
414
415 __m128i output;
416 for (int i=0; i<16; i++)
417 ((byte *)&output)[i] = c.GetByte(i);
418 return output;
419 }
420 #endif // Testing
421
422 // Swaps high and low 64-bit words
423 inline __m128i SwapWords(const __m128i& val)
424 {
425 return _mm_shuffle_epi32(val, _MM_SHUFFLE(1, 0, 3, 2));
426 }
427
428 // SunCC 5.11-5.15 compiler crash. Make the function inline
429 // and parameters non-const. Also see GH #188 and GH #224.
430 inline __m128i GCM_Reduce_CLMUL(__m128i c0, __m128i c1, __m128i c2, const __m128i& r)
431 {
432 /*
433 The polynomial to be reduced is c0 * x^128 + c1 * x^64 + c2. c0t below refers to the most
434 significant half of c0 as a polynomial, which, due to GCM's bit reflection, are in the
435 rightmost bit positions, and the lowest byte addresses.
436
437 c1 ^= c0t * 0xc200000000000000
438 c2t ^= c0t
439 t = shift (c1t ^ c0b) left 1 bit
440 c2 ^= t * 0xe100000000000000
441 c2t ^= c1b
442 shift c2 left 1 bit and xor in lowest bit of c1t
443 */
444 c1 = _mm_xor_si128(c1, _mm_slli_si128(c0, 8));
445 c1 = _mm_xor_si128(c1, _mm_clmulepi64_si128(c0, r, 0x10));
446 c0 = _mm_xor_si128(c1, _mm_srli_si128(c0, 8));
447 c0 = _mm_slli_epi64(c0, 1);
448 c0 = _mm_clmulepi64_si128(c0, r, 0);
449 c2 = _mm_xor_si128(c2, c0);
450 c2 = _mm_xor_si128(c2, _mm_srli_si128(c1, 8));
451 c1 = _mm_unpacklo_epi64(c1, c2);
452 c1 = _mm_srli_epi64(c1, 63);
453 c2 = _mm_slli_epi64(c2, 1);
454 return _mm_xor_si128(c2, c1);
455 }
456
457 // SunCC 5.13-5.14 compiler crash. Don't make the function inline.
458 // This is in contrast to GCM_Reduce_CLMUL, which must be inline.
459 __m128i GCM_Multiply_CLMUL(const __m128i &x, const __m128i &h, const __m128i &r)
460 {
461 const __m128i c0 = _mm_clmulepi64_si128(x,h,0);
462 const __m128i c1 = _mm_xor_si128(_mm_clmulepi64_si128(x,h,1), _mm_clmulepi64_si128(x,h,0x10));
463 const __m128i c2 = _mm_clmulepi64_si128(x,h,0x11);
464
465 return GCM_Reduce_CLMUL(c0, c1, c2, r);
466 }
467
468 void GCM_SetKeyWithoutResync_CLMUL(const byte *hashKey, byte *mulTable, unsigned int tableSize)
469 {
470 const __m128i r = _mm_set_epi32(0xc2000000, 0x00000000, 0xe1000000, 0x00000000);
471 const __m128i m = _mm_set_epi32(0x00010203, 0x04050607, 0x08090a0b, 0x0c0d0e0f);
472 __m128i h0 = _mm_shuffle_epi8(_mm_load_si128(CONST_M128_CAST(hashKey)), m), h = h0;
473
474 unsigned int i;
475 for (i=0; i<tableSize-32; i+=32)
476 {
477 const __m128i h1 = GCM_Multiply_CLMUL(h, h0, r);
478 _mm_storel_epi64(M128_CAST(mulTable+i), h);
479 _mm_storeu_si128(M128_CAST(mulTable+i+16), h1);
480 _mm_storeu_si128(M128_CAST(mulTable+i+8), h);
481 _mm_storel_epi64(M128_CAST(mulTable+i+8), h1);
482 h = GCM_Multiply_CLMUL(h1, h0, r);
483 }
484
485 const __m128i h1 = GCM_Multiply_CLMUL(h, h0, r);
486 _mm_storel_epi64(M128_CAST(mulTable+i), h);
487 _mm_storeu_si128(M128_CAST(mulTable+i+16), h1);
488 _mm_storeu_si128(M128_CAST(mulTable+i+8), h);
489 _mm_storel_epi64(M128_CAST(mulTable+i+8), h1);
490 }
491
492 size_t GCM_AuthenticateBlocks_CLMUL(const byte *data, size_t len, const byte *mtable, byte *hbuffer)
493 {
494 const __m128i r = _mm_set_epi32(0xc2000000, 0x00000000, 0xe1000000, 0x00000000);
495 const __m128i m1 = _mm_set_epi32(0x00010203, 0x04050607, 0x08090a0b, 0x0c0d0e0f);
496 const __m128i m2 = _mm_set_epi32(0x08090a0b, 0x0c0d0e0f, 0x00010203, 0x04050607);
497 __m128i x = _mm_load_si128(M128_CAST(hbuffer));
498
499 while (len >= 16)
500 {
501 size_t i=0, s = UnsignedMin(len/16, 8U);
502 __m128i d1 = _mm_loadu_si128(CONST_M128_CAST(data+(s-1)*16));
503 __m128i d2 = _mm_shuffle_epi8(d1, m2);
504 __m128i c0 = _mm_setzero_si128();
505 __m128i c1 = _mm_setzero_si128();
506 __m128i c2 = _mm_setzero_si128();
507
508 while (true)
509 {
510 const __m128i h0 = _mm_load_si128(CONST_M128_CAST(mtable+(i+0)*16));
511 const __m128i h1 = _mm_load_si128(CONST_M128_CAST(mtable+(i+1)*16));
512 const __m128i h2 = _mm_xor_si128(h0, h1);
513
514 if (++i == s)
515 {
516 d1 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(data)), m1);
517 d1 = _mm_xor_si128(d1, x);
518 c0 = _mm_xor_si128(c0, _mm_clmulepi64_si128(d1, h0, 0));
519 c2 = _mm_xor_si128(c2, _mm_clmulepi64_si128(d1, h1, 1));
520 d1 = _mm_xor_si128(d1, SwapWords(d1));
521 c1 = _mm_xor_si128(c1, _mm_clmulepi64_si128(d1, h2, 0));
522 break;
523 }
524
525 d1 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(data+(s-i)*16-8)), m2);
526 c0 = _mm_xor_si128(c0, _mm_clmulepi64_si128(d2, h0, 1));
527 c2 = _mm_xor_si128(c2, _mm_clmulepi64_si128(d1, h1, 1));
528 d2 = _mm_xor_si128(d2, d1);
529 c1 = _mm_xor_si128(c1, _mm_clmulepi64_si128(d2, h2, 1));
530
531 if (++i == s)
532 {
533 d1 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(data)), m1);
534 d1 = _mm_xor_si128(d1, x);
535 c0 = _mm_xor_si128(c0, _mm_clmulepi64_si128(d1, h0, 0x10));
536 c2 = _mm_xor_si128(c2, _mm_clmulepi64_si128(d1, h1, 0x11));
537 d1 = _mm_xor_si128(d1, SwapWords(d1));
538 c1 = _mm_xor_si128(c1, _mm_clmulepi64_si128(d1, h2, 0x10));
539 break;
540 }
541
542 d2 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(data+(s-i)*16-8)), m1);
543 c0 = _mm_xor_si128(c0, _mm_clmulepi64_si128(d1, h0, 0x10));
544 c2 = _mm_xor_si128(c2, _mm_clmulepi64_si128(d2, h1, 0x10));
545 d1 = _mm_xor_si128(d1, d2);
546 c1 = _mm_xor_si128(c1, _mm_clmulepi64_si128(d1, h2, 0x10));
547 }
548 data += s*16;
549 len -= s*16;
550
551 c1 = _mm_xor_si128(_mm_xor_si128(c1, c0), c2);
552 x = GCM_Reduce_CLMUL(c0, c1, c2, r);
553 }
554
555 _mm_store_si128(M128_CAST(hbuffer), x);
556 return len;
557 }
558
559 void GCM_ReverseHashBufferIfNeeded_CLMUL(byte *hashBuffer)
560 {
561 // SSSE3 instruction, but only used with CLMUL
562 const __m128i mask = _mm_set_epi32(0x00010203, 0x04050607, 0x08090a0b, 0x0c0d0e0f);
563 _mm_storeu_si128(M128_CAST(hashBuffer), _mm_shuffle_epi8(
564 _mm_loadu_si128(CONST_M128_CAST(hashBuffer)), mask));
565 }
566 #endif // CRYPTOPP_CLMUL_AVAILABLE
567
568 // ***************************** POWER8 ***************************** //
569
570 #if CRYPTOPP_POWER8_AVAILABLE
571 void GCM_Xor16_POWER8(byte *a, const byte *b, const byte *c)
572 {
573 VecStore(VecXor(VecLoad(b), VecLoad(c)), a);
574 }
575 #endif // CRYPTOPP_POWER8_AVAILABLE
576
577 #if CRYPTOPP_POWER8_VMULL_AVAILABLE
578
579 uint64x2_p GCM_Reduce_VMULL(uint64x2_p c0, uint64x2_p c1, uint64x2_p c2, uint64x2_p r)
580 {
581 const uint64x2_p m1 = {1,1}, m63 = {63,63};
582
583 c1 = VecXor(c1, VecShiftRightOctet<8>(c0));
584 c1 = VecXor(c1, VecIntelMultiply10(c0, r));
585 c0 = VecXor(c1, VecShiftLeftOctet<8>(c0));
586 c0 = VecIntelMultiply00(vec_sl(c0, m1), r);
587 c2 = VecXor(c2, c0);
588 c2 = VecXor(c2, VecShiftLeftOctet<8>(c1));
589 c1 = vec_sr(vec_mergeh(c1, c2), m63);
590 c2 = vec_sl(c2, m1);
591
592 return VecXor(c2, c1);
593 }
594
595 inline uint64x2_p GCM_Multiply_VMULL(uint64x2_p x, uint64x2_p h, uint64x2_p r)
596 {
597 const uint64x2_p c0 = VecIntelMultiply00(x, h);
598 const uint64x2_p c1 = VecXor(VecIntelMultiply01(x, h), VecIntelMultiply10(x, h));
599 const uint64x2_p c2 = VecIntelMultiply11(x, h);
600
601 return GCM_Reduce_VMULL(c0, c1, c2, r);
602 }
603
604 inline uint64x2_p LoadHashKey(const byte *hashKey)
605 {
606 #if (CRYPTOPP_BIG_ENDIAN)
607 const uint64x2_p key = (uint64x2_p)VecLoad(hashKey);
608 const uint8x16_p mask = {8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7};
609 return VecPermute(key, key, mask);
610 #else
611 const uint64x2_p key = (uint64x2_p)VecLoad(hashKey);
612 const uint8x16_p mask = {15,14,13,12, 11,10,9,8, 7,6,5,4, 3,2,1,0};
613 return VecPermute(key, key, mask);
614 #endif
615 }
616
617 void GCM_SetKeyWithoutResync_VMULL(const byte *hashKey, byte *mulTable, unsigned int tableSize)
618 {
619 const uint64x2_p r = {0xe100000000000000ull, 0xc200000000000000ull};
620 uint64x2_p h = LoadHashKey(hashKey), h0 = h;
621
622 unsigned int i;
623 uint64_t temp[2];
624
625 for (i=0; i<tableSize-32; i+=32)
626 {
627 const uint64x2_p h1 = GCM_Multiply_VMULL(h, h0, r);
628 VecStore(h, (byte*)temp);
629 std::memcpy(mulTable+i, temp+0, 8);
630 VecStore(h1, mulTable+i+16);
631 VecStore(h, mulTable+i+8);
632 VecStore(h1, (byte*)temp);
633 std::memcpy(mulTable+i+8, temp+0, 8);
634 h = GCM_Multiply_VMULL(h1, h0, r);
635 }
636
637 const uint64x2_p h1 = GCM_Multiply_VMULL(h, h0, r);
638 VecStore(h, (byte*)temp);
639 std::memcpy(mulTable+i, temp+0, 8);
640 VecStore(h1, mulTable+i+16);
641 VecStore(h, mulTable+i+8);
642 VecStore(h1, (byte*)temp);
643 std::memcpy(mulTable+i+8, temp+0, 8);
644 }
645
646 // Swaps high and low 64-bit words
647 template <class T>
648 inline T SwapWords(const T& data)
649 {
650 return (T)VecRotateLeftOctet<8>(data);
651 }
652
653 inline uint64x2_p LoadBuffer1(const byte *dataBuffer)
654 {
655 #if (CRYPTOPP_BIG_ENDIAN)
656 return (uint64x2_p)VecLoad(dataBuffer);
657 #else
658 const uint64x2_p data = (uint64x2_p)VecLoad(dataBuffer);
659 const uint8x16_p mask = {7,6,5,4, 3,2,1,0, 15,14,13,12, 11,10,9,8};
660 return VecPermute(data, data, mask);
661 #endif
662 }
663
664 inline uint64x2_p LoadBuffer2(const byte *dataBuffer)
665 {
666 #if (CRYPTOPP_BIG_ENDIAN)
667 return (uint64x2_p)SwapWords(VecLoadBE(dataBuffer));
668 #else
669 return (uint64x2_p)VecLoadBE(dataBuffer);
670 #endif
671 }
672
673 size_t GCM_AuthenticateBlocks_VMULL(const byte *data, size_t len, const byte *mtable, byte *hbuffer)
674 {
675 const uint64x2_p r = {0xe100000000000000ull, 0xc200000000000000ull};
676 uint64x2_p x = (uint64x2_p)VecLoad(hbuffer);
677
678 while (len >= 16)
679 {
680 size_t i=0, s = UnsignedMin(len/16, 8U);
681 uint64x2_p d1, d2 = LoadBuffer1(data+(s-1)*16);
682 uint64x2_p c0 = {0}, c1 = {0}, c2 = {0};
683
684 while (true)
685 {
686 const uint64x2_p h0 = (uint64x2_p)VecLoad(mtable+(i+0)*16);
687 const uint64x2_p h1 = (uint64x2_p)VecLoad(mtable+(i+1)*16);
688 const uint64x2_p h2 = (uint64x2_p)VecXor(h0, h1);
689
690 if (++i == s)
691 {
692 d1 = LoadBuffer2(data);
693 d1 = VecXor(d1, x);
694 c0 = VecXor(c0, VecIntelMultiply00(d1, h0));
695 c2 = VecXor(c2, VecIntelMultiply01(d1, h1));
696 d1 = VecXor(d1, SwapWords(d1));
697 c1 = VecXor(c1, VecIntelMultiply00(d1, h2));
698 break;
699 }
700
701 d1 = LoadBuffer1(data+(s-i)*16-8);
702 c0 = VecXor(c0, VecIntelMultiply01(d2, h0));
703 c2 = VecXor(c2, VecIntelMultiply01(d1, h1));
704 d2 = VecXor(d2, d1);
705 c1 = VecXor(c1, VecIntelMultiply01(d2, h2));
706
707 if (++i == s)
708 {
709 d1 = LoadBuffer2(data);
710 d1 = VecXor(d1, x);
711 c0 = VecXor(c0, VecIntelMultiply10(d1, h0));
712 c2 = VecXor(c2, VecIntelMultiply11(d1, h1));
713 d1 = VecXor(d1, SwapWords(d1));
714 c1 = VecXor(c1, VecIntelMultiply10(d1, h2));
715 break;
716 }
717
718 d2 = LoadBuffer2(data+(s-i)*16-8);
719 c0 = VecXor(c0, VecIntelMultiply10(d1, h0));
720 c2 = VecXor(c2, VecIntelMultiply10(d2, h1));
721 d1 = VecXor(d1, d2);
722 c1 = VecXor(c1, VecIntelMultiply10(d1, h2));
723 }
724 data += s*16;
725 len -= s*16;
726
727 c1 = VecXor(VecXor(c1, c0), c2);
728 x = GCM_Reduce_VMULL(c0, c1, c2, r);
729 }
730
731 VecStore(x, hbuffer);
732 return len;
733 }
734
735 void GCM_ReverseHashBufferIfNeeded_VMULL(byte *hashBuffer)
736 {
737 const uint64x2_p mask = {0x08090a0b0c0d0e0full, 0x0001020304050607ull};
738 VecStore(VecPermute(VecLoad(hashBuffer), mask), hashBuffer);
739 }
740 #endif // CRYPTOPP_POWER8_VMULL_AVAILABLE
741
742 NAMESPACE_END
CONST_M128_CAST
#define CONST_M128_CAST(x)
Clang workaround.
Definition: adv_simd.h:614
VecIntelMultiply01
uint64x2_p VecIntelMultiply01(const uint64x2_p &a, const uint64x2_p &b)
Polynomial multiplication.
Definition: ppc_simd.h:2532
misc.h
Utility functions for the Crypto++ library.
PMULL_10
uint64x2_t PMULL_10(const uint64x2_t a, const uint64x2_t b)
Polynomial multiplication.
Definition: arm_simd.h:94
VecIntelMultiply00
uint64x2_p VecIntelMultiply00(const uint64x2_p &a, const uint64x2_p &b)
Polynomial multiplication.
Definition: ppc_simd.h:2510
config.h
Library configuration file.
BlockGetAndPut
Access a block of memory.
Definition: misc.h:2587
PMULL_01
uint64x2_t PMULL_01(const uint64x2_t a, const uint64x2_t b)
Polynomial multiplication.
Definition: arm_simd.h:64
PolynomialMod2
Polynomial with Coefficients in GF(2)
Definition: gf2n.h:26
VecPermute
T1 VecPermute(const T1 vec, const T2 mask)
Permutes a vector.
Definition: ppc_simd.h:1474
M128_CAST
#define M128_CAST(x)
Clang workaround.
Definition: adv_simd.h:609
PMULL_00
uint64x2_t PMULL_00(const uint64x2_t a, const uint64x2_t b)
Polynomial multiplication.
Definition: arm_simd.h:34
uint32x4_p
__vector unsigned int uint32x4_p
Vector of 32-bit elements.
Definition: ppc_simd.h:198
ppc_simd.h
Support functions for PowerPC and vector operations.
pch.h
Precompiled header file.
UnsignedMin
const T1 UnsignedMin(const T1 &a, const T2 &b)
Safe comparison of values that could be neagtive and incorrectly promoted.
Definition: misc.h:674
VecStore
void VecStore(const T data, byte dest[16])
Stores a vector to a byte array.
Definition: ppc_simd.h:891
BIG_ENDIAN_ORDER
byte order is big-endian
Definition: cryptlib.h:147
VecXor
T1 VecXor(const T1 vec1, const T2 vec2)
XOR two vectors.
Definition: ppc_simd.h:1410
VecEqual
bool VecEqual(const T1 vec1, const T2 vec2)
Compare two vectors.
Definition: ppc_simd.h:1968
uint64x2_p
__vector unsigned long long uint64x2_p
Vector of 64-bit elements.
Definition: ppc_simd.h:208
VecIntelMultiply11
uint64x2_p VecIntelMultiply11(const uint64x2_p &a, const uint64x2_p &b)
Polynomial multiplication.
Definition: ppc_simd.h:2576
VecLoadBE
uint32x4_p VecLoadBE(const byte src[16])
Loads a vector from a byte array.
Definition: ppc_simd.h:738
GetNativeByteOrder
ByteOrder GetNativeByteOrder()
Returns NativeByteOrder as an enumerated ByteOrder value.
Definition: misc.h:1244
PolynomialMod2::GetByte
byte GetByte(size_t n) const
return the n-th byte
Definition: gf2n.cpp:114
PMULL_11
uint64x2_t PMULL_11(const uint64x2_t a, const uint64x2_t b)
Polynomial multiplication.
Definition: arm_simd.h:124
PutBlock
Access a block of memory.
Definition: misc.h:2550
CryptoPP
Crypto++ library namespace.
VecLoad
uint32x4_p VecLoad(const byte src[16])
Loads a vector from a byte array.
Definition: ppc_simd.h:365
ByteReverse
byte ByteReverse(byte value)
Reverses bytes in a 8-bit value.
Definition: misc.h:2002
uint8x16_p
__vector unsigned char uint8x16_p
Vector of 8-bit elements.
Definition: ppc_simd.h:188
VecIntelMultiply10
uint64x2_p VecIntelMultiply10(const uint64x2_p &a, const uint64x2_p &b)
Polynomial multiplication.
Definition: ppc_simd.h:2554
arm_simd.h
Support functions for ARM and vector operations.