1 /*
2 * Copyright 2009-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <setjmp.h>
14 #include <signal.h>
15 #include <unistd.h>
16 #if defined(__linux) || defined(_AIX)
17 # include <sys/utsname.h>
18 #endif
19 #if defined(_AIX53) /* defined even on post-5.3 */
20 # include <sys/systemcfg.h>
21 # if !defined(__power_set)
22 # define __power_set(a) (_system_configuration.implementation & (a))
23 # endif
24 #endif
25 #if defined(__APPLE__) && defined(__MACH__)
26 # include <sys/types.h>
27 # include <sys/sysctl.h>
28 #endif
29 #if defined(__NetBSD__)
30 # include <sys/param.h>
31 # include <sys/sysctl.h>
32 #endif
33 #include <openssl/crypto.h>
34 #include <openssl/bn.h>
35 #include <internal/cryptlib.h>
36 #include <crypto/chacha.h>
37 #include "bn/bn_local.h"
38
39 #include "ppc_arch.h"
40
41 unsigned int OPENSSL_ppccap_P = 0;
42
43 static sigset_t all_masked;
44
45 #ifdef OPENSSL_BN_ASM_MONT
bn_mul_mont(BN_ULONG * rp,const BN_ULONG * ap,const BN_ULONG * bp,const BN_ULONG * np,const BN_ULONG * n0,int num)46 int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
47 const BN_ULONG *np, const BN_ULONG *n0, int num)
48 {
49 int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
50 const BN_ULONG *np, const BN_ULONG *n0, int num);
51 int bn_mul4x_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
52 const BN_ULONG *np, const BN_ULONG *n0, int num);
53
54 if (num < 4)
55 return 0;
56
57 if ((num & 3) == 0)
58 return bn_mul4x_mont_int(rp, ap, bp, np, n0, num);
59
60 /*
61 * There used to be [optional] call to bn_mul_mont_fpu64 here,
62 * but above subroutine is faster on contemporary processors.
63 * Formulation means that there might be old processors where
64 * FPU code path would be faster, POWER6 perhaps, but there was
65 * no opportunity to figure it out...
66 */
67
68 return bn_mul_mont_int(rp, ap, bp, np, n0, num);
69 }
70 #endif
71
72 #ifdef DONT_USE_SHA256_FROM_LIBC
73 void sha256_block_p8(void *ctx, const void *inp, size_t len);
74 void sha256_block_ppc(void *ctx, const void *inp, size_t len);
75 void sha256_block_data_order(void *ctx, const void *inp, size_t len);
sha256_block_data_order(void * ctx,const void * inp,size_t len)76 void sha256_block_data_order(void *ctx, const void *inp, size_t len)
77 {
78 OPENSSL_ppccap_P & PPC_CRYPTO207 ? sha256_block_p8(ctx, inp, len) :
79 sha256_block_ppc(ctx, inp, len);
80 }
81 #endif
82
83 #ifdef DONT_USE_SHA512_FROM_LIBC
84 void sha512_block_p8(void *ctx, const void *inp, size_t len);
85 void sha512_block_ppc(void *ctx, const void *inp, size_t len);
86 void sha512_block_data_order(void *ctx, const void *inp, size_t len);
sha512_block_data_order(void * ctx,const void * inp,size_t len)87 void sha512_block_data_order(void *ctx, const void *inp, size_t len)
88 {
89 OPENSSL_ppccap_P & PPC_CRYPTO207 ? sha512_block_p8(ctx, inp, len) :
90 sha512_block_ppc(ctx, inp, len);
91 }
92 #endif
93
94 #ifndef OPENSSL_NO_CHACHA
95 void ChaCha20_ctr32_int(unsigned char *out, const unsigned char *inp,
96 size_t len, const unsigned int key[8],
97 const unsigned int counter[4]);
98 void ChaCha20_ctr32_vmx(unsigned char *out, const unsigned char *inp,
99 size_t len, const unsigned int key[8],
100 const unsigned int counter[4]);
101 void ChaCha20_ctr32_vsx(unsigned char *out, const unsigned char *inp,
102 size_t len, const unsigned int key[8],
103 const unsigned int counter[4]);
ChaCha20_ctr32(unsigned char * out,const unsigned char * inp,size_t len,const unsigned int key[8],const unsigned int counter[4])104 void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp,
105 size_t len, const unsigned int key[8],
106 const unsigned int counter[4])
107 {
108 OPENSSL_ppccap_P & PPC_CRYPTO207
109 ? ChaCha20_ctr32_vsx(out, inp, len, key, counter)
110 : OPENSSL_ppccap_P & PPC_ALTIVEC
111 ? ChaCha20_ctr32_vmx(out, inp, len, key, counter)
112 : ChaCha20_ctr32_int(out, inp, len, key, counter);
113 }
114 #endif
115
116 #ifndef OPENSSL_NO_POLY1305
117 void poly1305_init_int(void *ctx, const unsigned char key[16]);
118 void poly1305_blocks(void *ctx, const unsigned char *inp, size_t len,
119 unsigned int padbit);
120 void poly1305_emit(void *ctx, unsigned char mac[16],
121 const unsigned int nonce[4]);
122 void poly1305_init_fpu(void *ctx, const unsigned char key[16]);
123 void poly1305_blocks_fpu(void *ctx, const unsigned char *inp, size_t len,
124 unsigned int padbit);
125 void poly1305_emit_fpu(void *ctx, unsigned char mac[16],
126 const unsigned int nonce[4]);
127 int poly1305_init(void *ctx, const unsigned char key[16], void *func[2]);
poly1305_init(void * ctx,const unsigned char key[16],void * func[2])128 int poly1305_init(void *ctx, const unsigned char key[16], void *func[2])
129 {
130 if (sizeof(size_t) == 4 && (OPENSSL_ppccap_P & PPC_FPU)) {
131 poly1305_init_fpu(ctx, key);
132 func[0] = (void*)(uintptr_t)poly1305_blocks_fpu;
133 func[1] = (void*)(uintptr_t)poly1305_emit_fpu;
134 } else {
135 poly1305_init_int(ctx, key);
136 func[0] = (void*)(uintptr_t)poly1305_blocks;
137 func[1] = (void*)(uintptr_t)poly1305_emit;
138 }
139 return 1;
140 }
141 #endif
142
143 #ifdef ECP_NISTZ256_ASM
144 void ecp_nistz256_mul_mont(unsigned long res[4], const unsigned long a[4],
145 const unsigned long b[4]);
146
147 void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4]);
ecp_nistz256_to_mont(unsigned long res[4],const unsigned long in[4])148 void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4])
149 {
150 static const unsigned long RR[] = { 0x0000000000000003U,
151 0xfffffffbffffffffU,
152 0xfffffffffffffffeU,
153 0x00000004fffffffdU };
154
155 ecp_nistz256_mul_mont(res, in, RR);
156 }
157
158 void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4]);
ecp_nistz256_from_mont(unsigned long res[4],const unsigned long in[4])159 void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4])
160 {
161 static const unsigned long one[] = { 1, 0, 0, 0 };
162
163 ecp_nistz256_mul_mont(res, in, one);
164 }
165 #endif
166
167 static sigjmp_buf ill_jmp;
ill_handler(int sig)168 static void ill_handler(int sig)
169 {
170 siglongjmp(ill_jmp, sig);
171 }
172
173 void OPENSSL_fpu_probe(void);
174 void OPENSSL_ppc64_probe(void);
175 void OPENSSL_altivec_probe(void);
176 void OPENSSL_crypto207_probe(void);
177 void OPENSSL_madd300_probe(void);
178
179 long OPENSSL_rdtsc_mftb(void);
180 long OPENSSL_rdtsc_mfspr268(void);
181
OPENSSL_rdtsc(void)182 uint32_t OPENSSL_rdtsc(void)
183 {
184 if (OPENSSL_ppccap_P & PPC_MFTB)
185 return OPENSSL_rdtsc_mftb();
186 else if (OPENSSL_ppccap_P & PPC_MFSPR268)
187 return OPENSSL_rdtsc_mfspr268();
188 else
189 return 0;
190 }
191
192 size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t);
193 size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t);
194
OPENSSL_instrument_bus(unsigned int * out,size_t cnt)195 size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
196 {
197 if (OPENSSL_ppccap_P & PPC_MFTB)
198 return OPENSSL_instrument_bus_mftb(out, cnt);
199 else if (OPENSSL_ppccap_P & PPC_MFSPR268)
200 return OPENSSL_instrument_bus_mfspr268(out, cnt);
201 else
202 return 0;
203 }
204
205 size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t);
206 size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t);
207
OPENSSL_instrument_bus2(unsigned int * out,size_t cnt,size_t max)208 size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
209 {
210 if (OPENSSL_ppccap_P & PPC_MFTB)
211 return OPENSSL_instrument_bus2_mftb(out, cnt, max);
212 else if (OPENSSL_ppccap_P & PPC_MFSPR268)
213 return OPENSSL_instrument_bus2_mfspr268(out, cnt, max);
214 else
215 return 0;
216 }
217
218 #if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
219 # if __GLIBC_PREREQ(2, 16)
220 # include <sys/auxv.h>
221 # define OSSL_IMPLEMENT_GETAUXVAL
222 # elif defined(__ANDROID_API__)
223 /* see https://developer.android.google.cn/ndk/guides/cpu-features */
224 # if __ANDROID_API__ >= 18
225 # include <sys/auxv.h>
226 # define OSSL_IMPLEMENT_GETAUXVAL
227 # endif
228 # endif
229 #endif
230
231 #if defined(__FreeBSD__)
232 # include <sys/param.h>
233 # if __FreeBSD_version >= 1200000
234 # include <sys/auxv.h>
235 # define OSSL_IMPLEMENT_GETAUXVAL
236
getauxval(unsigned long key)237 static unsigned long getauxval(unsigned long key)
238 {
239 unsigned long val = 0ul;
240
241 if (elf_aux_info((int)key, &val, sizeof(val)) != 0)
242 return 0ul;
243
244 return val;
245 }
246 # endif
247 #endif
248
249 /* I wish <sys/auxv.h> was universally available */
250 #define HWCAP 16 /* AT_HWCAP */
251 #define HWCAP_PPC64 (1U << 30)
252 #define HWCAP_ALTIVEC (1U << 28)
253 #define HWCAP_FPU (1U << 27)
254 #define HWCAP_POWER6_EXT (1U << 9)
255 #define HWCAP_VSX (1U << 7)
256
257 #define HWCAP2 26 /* AT_HWCAP2 */
258 #define HWCAP_VEC_CRYPTO (1U << 25)
259 #define HWCAP_ARCH_3_00 (1U << 23)
260
261 # if defined(__GNUC__) && __GNUC__>=2
262 __attribute__ ((constructor))
263 # endif
OPENSSL_cpuid_setup(void)264 void OPENSSL_cpuid_setup(void)
265 {
266 char *e;
267 struct sigaction ill_oact, ill_act;
268 sigset_t oset;
269 static int trigger = 0;
270
271 if (trigger)
272 return;
273 trigger = 1;
274
275 if ((e = getenv("OPENSSL_ppccap"))) {
276 OPENSSL_ppccap_P = strtoul(e, NULL, 0);
277 return;
278 }
279
280 OPENSSL_ppccap_P = 0;
281
282 #if defined(_AIX)
283 OPENSSL_ppccap_P |= PPC_FPU;
284
285 if (sizeof(size_t) == 4) {
286 struct utsname uts;
287 # if defined(_SC_AIX_KERNEL_BITMODE)
288 if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64)
289 return;
290 # endif
291 if (uname(&uts) != 0 || atoi(uts.version) < 6)
292 return;
293 }
294
295 # if defined(__power_set)
296 /*
297 * Value used in __power_set is a single-bit 1<<n one denoting
298 * specific processor class. Incidentally 0xffffffff<<n can be
299 * used to denote specific processor and its successors.
300 */
301 if (sizeof(size_t) == 4) {
302 /* In 32-bit case PPC_FPU64 is always fastest [if option] */
303 if (__power_set(0xffffffffU<<13)) /* POWER5 and later */
304 OPENSSL_ppccap_P |= PPC_FPU64;
305 } else {
306 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
307 if (__power_set(0x1U<<14)) /* POWER6 */
308 OPENSSL_ppccap_P |= PPC_FPU64;
309 }
310
311 if (__power_set(0xffffffffU<<14)) /* POWER6 and later */
312 OPENSSL_ppccap_P |= PPC_ALTIVEC;
313
314 if (__power_set(0xffffffffU<<16)) /* POWER8 and later */
315 OPENSSL_ppccap_P |= PPC_CRYPTO207;
316
317 if (__power_set(0xffffffffU<<17)) /* POWER9 and later */
318 OPENSSL_ppccap_P |= PPC_MADD300;
319
320 return;
321 # endif
322 #endif
323
324 #if defined(__APPLE__) && defined(__MACH__)
325 OPENSSL_ppccap_P |= PPC_FPU;
326
327 {
328 int val;
329 size_t len = sizeof(val);
330
331 if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) {
332 if (val)
333 OPENSSL_ppccap_P |= PPC_FPU64;
334 }
335
336 len = sizeof(val);
337 if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) {
338 if (val)
339 OPENSSL_ppccap_P |= PPC_ALTIVEC;
340 }
341
342 return;
343 }
344 #endif
345
346 #ifdef OSSL_IMPLEMENT_GETAUXVAL
347 {
348 unsigned long hwcap = getauxval(HWCAP);
349 unsigned long hwcap2 = getauxval(HWCAP2);
350
351 if (hwcap & HWCAP_FPU) {
352 OPENSSL_ppccap_P |= PPC_FPU;
353
354 if (sizeof(size_t) == 4) {
355 /* In 32-bit case PPC_FPU64 is always fastest [if option] */
356 if (hwcap & HWCAP_PPC64)
357 OPENSSL_ppccap_P |= PPC_FPU64;
358 } else {
359 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
360 if (hwcap & HWCAP_POWER6_EXT)
361 OPENSSL_ppccap_P |= PPC_FPU64;
362 }
363 }
364
365 if (hwcap & HWCAP_ALTIVEC) {
366 OPENSSL_ppccap_P |= PPC_ALTIVEC;
367
368 if ((hwcap & HWCAP_VSX) && (hwcap2 & HWCAP_VEC_CRYPTO))
369 OPENSSL_ppccap_P |= PPC_CRYPTO207;
370 }
371
372 if (hwcap2 & HWCAP_ARCH_3_00) {
373 OPENSSL_ppccap_P |= PPC_MADD300;
374 }
375 }
376 #endif
377
378 sigfillset(&all_masked);
379 sigdelset(&all_masked, SIGILL);
380 sigdelset(&all_masked, SIGTRAP);
381 #ifdef SIGEMT
382 sigdelset(&all_masked, SIGEMT);
383 #endif
384 sigdelset(&all_masked, SIGFPE);
385 sigdelset(&all_masked, SIGBUS);
386 sigdelset(&all_masked, SIGSEGV);
387
388 memset(&ill_act, 0, sizeof(ill_act));
389 ill_act.sa_handler = ill_handler;
390 ill_act.sa_mask = all_masked;
391
392 sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
393 sigaction(SIGILL, &ill_act, &ill_oact);
394
395 #ifndef OSSL_IMPLEMENT_GETAUXVAL
396 # ifdef __NetBSD__
397 int error, val;
398 size_t len = sizeof(val);
399
400 /*
401 * If machdep.fpu_present == 0, FPU is absent and emulated by
402 * software. In that case, using FPU instructions hurts rather
403 * than helps performance, and the software is unlikely to run in
404 * constant time so it would expose us to timing side channel
405 * attacks. So don't do it!
406 */
407 error = sysctlbyname("machdep.fpu_present", &val, &len, NULL, 0);
408 if (error != 0 || (error == 0 && val != 0))
409 # endif
410 if (sigsetjmp(ill_jmp,1) == 0) {
411 OPENSSL_fpu_probe();
412 OPENSSL_ppccap_P |= PPC_FPU;
413
414 if (sizeof(size_t) == 4) {
415 # ifdef __linux
416 struct utsname uts;
417 if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0)
418 # endif
419 if (sigsetjmp(ill_jmp, 1) == 0) {
420 OPENSSL_ppc64_probe();
421 OPENSSL_ppccap_P |= PPC_FPU64;
422 }
423 } else {
424 /*
425 * Wanted code detecting POWER6 CPU and setting PPC_FPU64
426 */
427 }
428 }
429
430 if (sigsetjmp(ill_jmp, 1) == 0) {
431 OPENSSL_altivec_probe();
432 OPENSSL_ppccap_P |= PPC_ALTIVEC;
433 if (sigsetjmp(ill_jmp, 1) == 0) {
434 OPENSSL_crypto207_probe();
435 OPENSSL_ppccap_P |= PPC_CRYPTO207;
436 }
437 }
438
439 if (sigsetjmp(ill_jmp, 1) == 0) {
440 OPENSSL_madd300_probe();
441 OPENSSL_ppccap_P |= PPC_MADD300;
442 }
443 #endif
444
445 if (sigsetjmp(ill_jmp, 1) == 0) {
446 OPENSSL_rdtsc_mftb();
447 OPENSSL_ppccap_P |= PPC_MFTB;
448 } else if (sigsetjmp(ill_jmp, 1) == 0) {
449 OPENSSL_rdtsc_mfspr268();
450 OPENSSL_ppccap_P |= PPC_MFSPR268;
451 }
452
453 sigaction(SIGILL, &ill_oact, NULL);
454 sigprocmask(SIG_SETMASK, &oset, NULL);
455 }
456