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