1 /* 2 * Copyright 2009-2018 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 <internal/chacha.h> 33 #include "bn/bn_lcl.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 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); 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); 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]); 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]); 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]); 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]); 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; 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 /* 172 * Use a weak reference to getauxval() so we can use it if it is available 173 * but don't break the build if it is not. Note that this is *link-time* 174 * feature detection, not *run-time*. In other words if we link with 175 * symbol present, it's expected to be present even at run-time. 176 */ 177 #if defined(__GNUC__) && __GNUC__>=2 && defined(__ELF__) 178 extern unsigned long getauxval(unsigned long type) __attribute__ ((weak)); 179 #else 180 static unsigned long (*getauxval) (unsigned long) = NULL; 181 #endif 182 183 /* I wish <sys/auxv.h> was universally available */ 184 #define HWCAP 16 /* AT_HWCAP */ 185 #define HWCAP_PPC64 (1U << 30) 186 #define HWCAP_ALTIVEC (1U << 28) 187 #define HWCAP_FPU (1U << 27) 188 #define HWCAP_POWER6_EXT (1U << 9) 189 #define HWCAP_VSX (1U << 7) 190 191 #define HWCAP2 26 /* AT_HWCAP2 */ 192 #define HWCAP_VEC_CRYPTO (1U << 25) 193 #define HWCAP_ARCH_3_00 (1U << 23) 194 195 # if defined(__GNUC__) && __GNUC__>=2 196 __attribute__ ((constructor)) 197 # endif 198 void OPENSSL_cpuid_setup(void) 199 { 200 char *e; 201 struct sigaction ill_oact, ill_act; 202 sigset_t oset; 203 static int trigger = 0; 204 205 if (trigger) 206 return; 207 trigger = 1; 208 209 if ((e = getenv("OPENSSL_ppccap"))) { 210 OPENSSL_ppccap_P = strtoul(e, NULL, 0); 211 return; 212 } 213 214 OPENSSL_ppccap_P = 0; 215 216 #if defined(_AIX) 217 OPENSSL_ppccap_P |= PPC_FPU; 218 219 if (sizeof(size_t) == 4) { 220 struct utsname uts; 221 # if defined(_SC_AIX_KERNEL_BITMODE) 222 if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64) 223 return; 224 # endif 225 if (uname(&uts) != 0 || atoi(uts.version) < 6) 226 return; 227 } 228 229 # if defined(__power_set) 230 /* 231 * Value used in __power_set is a single-bit 1<<n one denoting 232 * specific processor class. Incidentally 0xffffffff<<n can be 233 * used to denote specific processor and its successors. 234 */ 235 if (sizeof(size_t) == 4) { 236 /* In 32-bit case PPC_FPU64 is always fastest [if option] */ 237 if (__power_set(0xffffffffU<<13)) /* POWER5 and later */ 238 OPENSSL_ppccap_P |= PPC_FPU64; 239 } else { 240 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */ 241 if (__power_set(0x1U<<14)) /* POWER6 */ 242 OPENSSL_ppccap_P |= PPC_FPU64; 243 } 244 245 if (__power_set(0xffffffffU<<14)) /* POWER6 and later */ 246 OPENSSL_ppccap_P |= PPC_ALTIVEC; 247 248 if (__power_set(0xffffffffU<<16)) /* POWER8 and later */ 249 OPENSSL_ppccap_P |= PPC_CRYPTO207; 250 251 if (__power_set(0xffffffffU<<17)) /* POWER9 and later */ 252 OPENSSL_ppccap_P |= PPC_MADD300; 253 254 return; 255 # endif 256 #endif 257 258 #if defined(__APPLE__) && defined(__MACH__) 259 OPENSSL_ppccap_P |= PPC_FPU; 260 261 { 262 int val; 263 size_t len = sizeof(val); 264 265 if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) { 266 if (val) 267 OPENSSL_ppccap_P |= PPC_FPU64; 268 } 269 270 len = sizeof(val); 271 if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) { 272 if (val) 273 OPENSSL_ppccap_P |= PPC_ALTIVEC; 274 } 275 276 return; 277 } 278 #endif 279 280 if (getauxval != NULL) { 281 unsigned long hwcap = getauxval(HWCAP); 282 283 if (hwcap & HWCAP_FPU) { 284 OPENSSL_ppccap_P |= PPC_FPU; 285 286 if (sizeof(size_t) == 4) { 287 /* In 32-bit case PPC_FPU64 is always fastest [if option] */ 288 if (hwcap & HWCAP_PPC64) 289 OPENSSL_ppccap_P |= PPC_FPU64; 290 } else { 291 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */ 292 if (hwcap & HWCAP_POWER6_EXT) 293 OPENSSL_ppccap_P |= PPC_FPU64; 294 } 295 } 296 297 if (hwcap & HWCAP_ALTIVEC) { 298 OPENSSL_ppccap_P |= PPC_ALTIVEC; 299 300 if ((hwcap & HWCAP_VSX) && (getauxval(HWCAP2) & HWCAP_VEC_CRYPTO)) 301 OPENSSL_ppccap_P |= PPC_CRYPTO207; 302 } 303 304 if (hwcap & HWCAP_ARCH_3_00) { 305 OPENSSL_ppccap_P |= PPC_MADD300; 306 } 307 308 return; 309 } 310 311 sigfillset(&all_masked); 312 sigdelset(&all_masked, SIGILL); 313 sigdelset(&all_masked, SIGTRAP); 314 #ifdef SIGEMT 315 sigdelset(&all_masked, SIGEMT); 316 #endif 317 sigdelset(&all_masked, SIGFPE); 318 sigdelset(&all_masked, SIGBUS); 319 sigdelset(&all_masked, SIGSEGV); 320 321 memset(&ill_act, 0, sizeof(ill_act)); 322 ill_act.sa_handler = ill_handler; 323 ill_act.sa_mask = all_masked; 324 325 sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset); 326 sigaction(SIGILL, &ill_act, &ill_oact); 327 328 if (sigsetjmp(ill_jmp,1) == 0) { 329 OPENSSL_fpu_probe(); 330 OPENSSL_ppccap_P |= PPC_FPU; 331 332 if (sizeof(size_t) == 4) { 333 #ifdef __linux 334 struct utsname uts; 335 if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0) 336 #endif 337 if (sigsetjmp(ill_jmp, 1) == 0) { 338 OPENSSL_ppc64_probe(); 339 OPENSSL_ppccap_P |= PPC_FPU64; 340 } 341 } else { 342 /* 343 * Wanted code detecting POWER6 CPU and setting PPC_FPU64 344 */ 345 } 346 } 347 348 if (sigsetjmp(ill_jmp, 1) == 0) { 349 OPENSSL_altivec_probe(); 350 OPENSSL_ppccap_P |= PPC_ALTIVEC; 351 if (sigsetjmp(ill_jmp, 1) == 0) { 352 OPENSSL_crypto207_probe(); 353 OPENSSL_ppccap_P |= PPC_CRYPTO207; 354 } 355 } 356 357 if (sigsetjmp(ill_jmp, 1) == 0) { 358 OPENSSL_madd300_probe(); 359 OPENSSL_ppccap_P |= PPC_MADD300; 360 } 361 362 sigaction(SIGILL, &ill_oact, NULL); 363 sigprocmask(SIG_SETMASK, &oset, NULL); 364 } 365