aboutsummaryrefslogtreecommitdiffstats
path: root/crypto/ppccap.c
blob: afb9e31b00288e75a848ddd590d2e319c5b9e27f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
/*
 * Copyright 2009-2019 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <signal.h>
#include <unistd.h>
#if defined(__linux) || defined(_AIX)
# include <sys/utsname.h>
#endif
#if defined(_AIX53)     /* defined even on post-5.3 */
# include <sys/systemcfg.h>
# if !defined(__power_set)
#  define __power_set(a) (_system_configuration.implementation & (a))
# endif
#endif
#if defined(__APPLE__) && defined(__MACH__)
# include <sys/types.h>
# include <sys/sysctl.h>
#endif
#include <openssl/crypto.h>
#include <openssl/bn.h>
#include <internal/cryptlib.h>
#include <internal/chacha.h>
#include "bn/bn_lcl.h"

#include "ppc_arch.h"

unsigned int OPENSSL_ppccap_P = 0;

static sigset_t all_masked;

#ifdef OPENSSL_BN_ASM_MONT
int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                const BN_ULONG *np, const BN_ULONG *n0, int num)
{
    int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                        const BN_ULONG *np, const BN_ULONG *n0, int num);
    int bn_mul4x_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                          const BN_ULONG *np, const BN_ULONG *n0, int num);

    if (num < 4)
        return 0;

    if ((num & 3) == 0)
        return bn_mul4x_mont_int(rp, ap, bp, np, n0, num);

    /*
     * There used to be [optional] call to bn_mul_mont_fpu64 here,
     * but above subroutine is faster on contemporary processors.
     * Formulation means that there might be old processors where
     * FPU code path would be faster, POWER6 perhaps, but there was
     * no opportunity to figure it out...
     */

    return bn_mul_mont_int(rp, ap, bp, np, n0, num);
}
#endif

void sha256_block_p8(void *ctx, const void *inp, size_t len);
void sha256_block_ppc(void *ctx, const void *inp, size_t len);
void sha256_block_data_order(void *ctx, const void *inp, size_t len);
void sha256_block_data_order(void *ctx, const void *inp, size_t len)
{
    OPENSSL_ppccap_P & PPC_CRYPTO207 ? sha256_block_p8(ctx, inp, len) :
        sha256_block_ppc(ctx, inp, len);
}

void sha512_block_p8(void *ctx, const void *inp, size_t len);
void sha512_block_ppc(void *ctx, const void *inp, size_t len);
void sha512_block_data_order(void *ctx, const void *inp, size_t len);
void sha512_block_data_order(void *ctx, const void *inp, size_t len)
{
    OPENSSL_ppccap_P & PPC_CRYPTO207 ? sha512_block_p8(ctx, inp, len) :
        sha512_block_ppc(ctx, inp, len);
}

#ifndef OPENSSL_NO_CHACHA
void ChaCha20_ctr32_int(unsigned char *out, const unsigned char *inp,
                        size_t len, const unsigned int key[8],
                        const unsigned int counter[4]);
void ChaCha20_ctr32_vmx(unsigned char *out, const unsigned char *inp,
                        size_t len, const unsigned int key[8],
                        const unsigned int counter[4]);
void ChaCha20_ctr32_vsx(unsigned char *out, const unsigned char *inp,
                        size_t len, const unsigned int key[8],
                        const unsigned int counter[4]);
void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp,
                    size_t len, const unsigned int key[8],
                    const unsigned int counter[4])
{
    OPENSSL_ppccap_P & PPC_CRYPTO207
        ? ChaCha20_ctr32_vsx(out, inp, len, key, counter)
        : OPENSSL_ppccap_P & PPC_ALTIVEC
            ? ChaCha20_ctr32_vmx(out, inp, len, key, counter)
            : ChaCha20_ctr32_int(out, inp, len, key, counter);
}
#endif

#ifndef OPENSSL_NO_POLY1305
void poly1305_init_int(void *ctx, const unsigned char key[16]);
void poly1305_blocks(void *ctx, const unsigned char *inp, size_t len,
                         unsigned int padbit);
void poly1305_emit(void *ctx, unsigned char mac[16],
                       const unsigned int nonce[4]);
void poly1305_init_fpu(void *ctx, const unsigned char key[16]);
void poly1305_blocks_fpu(void *ctx, const unsigned char *inp, size_t len,
                         unsigned int padbit);
void poly1305_emit_fpu(void *ctx, unsigned char mac[16],
                       const unsigned int nonce[4]);
int poly1305_init(void *ctx, const unsigned char key[16], void *func[2]);
int poly1305_init(void *ctx, const unsigned char key[16], void *func[2])
{
    if (sizeof(size_t) == 4 && (OPENSSL_ppccap_P & PPC_FPU)) {
        poly1305_init_fpu(ctx, key);
        func[0] = (void*)(uintptr_t)poly1305_blocks_fpu;
        func[1] = (void*)(uintptr_t)poly1305_emit_fpu;
    } else {
        poly1305_init_int(ctx, key);
        func[0] = (void*)(uintptr_t)poly1305_blocks;
        func[1] = (void*)(uintptr_t)poly1305_emit;
    }
    return 1;
}
#endif

#ifdef ECP_NISTZ256_ASM
void ecp_nistz256_mul_mont(unsigned long res[4], const unsigned long a[4],
                           const unsigned long b[4]);

void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4]);
void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4])
{
    static const unsigned long RR[] = { 0x0000000000000003U,
                                        0xfffffffbffffffffU,
                                        0xfffffffffffffffeU,
                                        0x00000004fffffffdU };

    ecp_nistz256_mul_mont(res, in, RR);
}

void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4]);
void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4])
{
    static const unsigned long one[] = { 1, 0, 0, 0 };

    ecp_nistz256_mul_mont(res, in, one);
}
#endif

static sigjmp_buf ill_jmp;
static void ill_handler(int sig)
{
    siglongjmp(ill_jmp, sig);
}

void OPENSSL_fpu_probe(void);
void OPENSSL_ppc64_probe(void);
void OPENSSL_altivec_probe(void);
void OPENSSL_crypto207_probe(void);
void OPENSSL_madd300_probe(void);

long OPENSSL_rdtsc_mftb(void);
long OPENSSL_rdtsc_mfspr268(void);

uint32_t OPENSSL_rdtsc(void)
{
    if (OPENSSL_ppccap_P & PPC_MFTB)
        return OPENSSL_rdtsc_mftb();
    else if (OPENSSL_ppccap_P & PPC_MFSPR268)
        return OPENSSL_rdtsc_mfspr268();
    else
        return 0;
}

size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t);
size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t);

size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
{
    if (OPENSSL_ppccap_P & PPC_MFTB)
        return OPENSSL_instrument_bus_mftb(out, cnt);
    else if (OPENSSL_ppccap_P & PPC_MFSPR268)
        return OPENSSL_instrument_bus_mfspr268(out, cnt);
    else
        return 0;
}

size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t);
size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t);

size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
{
    if (OPENSSL_ppccap_P & PPC_MFTB)
        return OPENSSL_instrument_bus2_mftb(out, cnt, max);
    else if (OPENSSL_ppccap_P & PPC_MFSPR268)
        return OPENSSL_instrument_bus2_mfspr268(out, cnt, max);
    else
        return 0;
}

#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
# if __GLIBC_PREREQ(2, 16)
#  include <sys/auxv.h>
#  define OSSL_IMPLEMENT_GETAUXVAL
# endif
#endif

/* I wish <sys/auxv.h> was universally available */
#define HWCAP                   16      /* AT_HWCAP */
#define HWCAP_PPC64             (1U << 30)
#define HWCAP_ALTIVEC           (1U << 28)
#define HWCAP_FPU               (1U << 27)
#define HWCAP_POWER6_EXT        (1U << 9)
#define HWCAP_VSX               (1U << 7)

#define HWCAP2                  26      /* AT_HWCAP2 */
#define HWCAP_VEC_CRYPTO        (1U << 25)
#define HWCAP_ARCH_3_00         (1U << 23)

# if defined(__GNUC__) && __GNUC__>=2
__attribute__ ((constructor))
# endif
void OPENSSL_cpuid_setup(void)
{
    char *e;
    struct sigaction ill_oact, ill_act;
    sigset_t oset;
    static int trigger = 0;

    if (trigger)
        return;
    trigger = 1;

    if ((e = getenv("OPENSSL_ppccap"))) {
        OPENSSL_ppccap_P = strtoul(e, NULL, 0);
        return;
    }

    OPENSSL_ppccap_P = 0;

#if defined(_AIX)
    OPENSSL_ppccap_P |= PPC_FPU;

    if (sizeof(size_t) == 4) {
        struct utsname uts;
# if defined(_SC_AIX_KERNEL_BITMODE)
        if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64)
            return;
# endif
        if (uname(&uts) != 0 || atoi(uts.version) < 6)
            return;
    }

# if defined(__power_set)
    /*
     * Value used in __power_set is a single-bit 1<<n one denoting
     * specific processor class. Incidentally 0xffffffff<<n can be
     * used to denote specific processor and its successors.
     */
    if (sizeof(size_t) == 4) {
        /* In 32-bit case PPC_FPU64 is always fastest [if option] */
        if (__power_set(0xffffffffU<<13))       /* POWER5 and later */
            OPENSSL_ppccap_P |= PPC_FPU64;
    } else {
        /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
        if (__power_set(0x1U<<14))              /* POWER6 */
            OPENSSL_ppccap_P |= PPC_FPU64;
    }

    if (__power_set(0xffffffffU<<14))           /* POWER6 and later */
        OPENSSL_ppccap_P |= PPC_ALTIVEC;

    if (__power_set(0xffffffffU<<16))           /* POWER8 and later */
        OPENSSL_ppccap_P |= PPC_CRYPTO207;

    if (__power_set(0xffffffffU<<17))           /* POWER9 and later */
        OPENSSL_ppccap_P |= PPC_MADD300;

    return;
# endif
#endif

#if defined(__APPLE__) && defined(__MACH__)
    OPENSSL_ppccap_P |= PPC_FPU;

    {
        int val;
        size_t len = sizeof(val);

        if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) {
            if (val)
                OPENSSL_ppccap_P |= PPC_FPU64;
        }

        len = sizeof(val);
        if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) {
            if (val)
                OPENSSL_ppccap_P |= PPC_ALTIVEC;
        }

        return;
    }
#endif

#ifdef OSSL_IMPLEMENT_GETAUXVAL
    {
        unsigned long hwcap = getauxval(HWCAP);

        if (hwcap & HWCAP_FPU) {
            OPENSSL_ppccap_P |= PPC_FPU;

            if (sizeof(size_t) == 4) {
                /* In 32-bit case PPC_FPU64 is always fastest [if option] */
                if (hwcap & HWCAP_PPC64)
                    OPENSSL_ppccap_P |= PPC_FPU64;
            } else {
                /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
                if (hwcap & HWCAP_POWER6_EXT)
                    OPENSSL_ppccap_P |= PPC_FPU64;
            }
        }

        if (hwcap & HWCAP_ALTIVEC) {
            OPENSSL_ppccap_P |= PPC_ALTIVEC;

            if ((hwcap & HWCAP_VSX) && (getauxval(HWCAP2) & HWCAP_VEC_CRYPTO))
                OPENSSL_ppccap_P |= PPC_CRYPTO207;
        }

        if (hwcap & HWCAP_ARCH_3_00) {
            OPENSSL_ppccap_P |= PPC_MADD300;
        }
    }
#endif

    sigfillset(&all_masked);
    sigdelset(&all_masked, SIGILL);
    sigdelset(&all_masked, SIGTRAP);
#ifdef SIGEMT
    sigdelset(&all_masked, SIGEMT);
#endif
    sigdelset(&all_masked, SIGFPE);
    sigdelset(&all_masked, SIGBUS);
    sigdelset(&all_masked, SIGSEGV);

    memset(&ill_act, 0, sizeof(ill_act));
    ill_act.sa_handler = ill_handler;
    ill_act.sa_mask = all_masked;

    sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
    sigaction(SIGILL, &ill_act, &ill_oact);

#ifndef OSSL_IMPLEMENT_GETAUXVAL
    if (sigsetjmp(ill_jmp,1) == 0) {
        OPENSSL_fpu_probe();
        OPENSSL_ppccap_P |= PPC_FPU;

        if (sizeof(size_t) == 4) {
# ifdef __linux
            struct utsname uts;
            if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0)
# endif
                if (sigsetjmp(ill_jmp, 1) == 0) {
                    OPENSSL_ppc64_probe();
                    OPENSSL_ppccap_P |= PPC_FPU64;
                }
        } else {
            /*
             * Wanted code detecting POWER6 CPU and setting PPC_FPU64
             */
        }
    }

    if (sigsetjmp(ill_jmp, 1) == 0) {
        OPENSSL_altivec_probe();
        OPENSSL_ppccap_P |= PPC_ALTIVEC;
        if (sigsetjmp(ill_jmp, 1) == 0) {
            OPENSSL_crypto207_probe();
            OPENSSL_ppccap_P |= PPC_CRYPTO207;
        }
    }

    if (sigsetjmp(ill_jmp, 1) == 0) {
        OPENSSL_madd300_probe();
        OPENSSL_ppccap_P |= PPC_MADD300;
    }
#endif

    if (sigsetjmp(ill_jmp, 1) == 0) {
        OPENSSL_rdtsc_mftb();
        OPENSSL_ppccap_P |= PPC_MFTB;
    } else if (sigsetjmp(ill_jmp, 1) == 0) {
        OPENSSL_rdtsc_mfspr268();
        OPENSSL_ppccap_P |= PPC_MFSPR268;
    }

    sigaction(SIGILL, &ill_oact, NULL);
    sigprocmask(SIG_SETMASK, &oset, NULL);
}