crypto/info.c

   1 /*
   2  * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 <openssl/crypto.h>
  11 #include "crypto/rand.h"
  12 #include "crypto/dso_conf.h"
  13 #include "internal/thread_once.h"
  14 #include "internal/cryptlib.h"
  15 #include "internal/e_os.h"
  16 #include "buildinf.h"
  17
  18 #if defined(__arm__) || defined(__arm) || defined(__aarch64__)
  19 # include "arm_arch.h"
  20 # define CPU_INFO_STR_LEN 128
  21 #elif defined(__s390__) || defined(__s390x__)
  22 # include "s390x_arch.h"
  23 # define CPU_INFO_STR_LEN 2048
  24 #elif defined(__riscv)
  25 # include "crypto/riscv_arch.h"
  26 # define CPU_INFO_STR_LEN 2048
  27 #else
  28 # define CPU_INFO_STR_LEN 128
  29 #endif
  30
  31 /* extern declaration to avoid warning */
  32 extern char ossl_cpu_info_str[];
  33
  34 static char *seed_sources = NULL;
  35
  36 char ossl_cpu_info_str[CPU_INFO_STR_LEN] = "";
  37 #define CPUINFO_PREFIX "CPUINFO: "
  38
  39 static CRYPTO_ONCE init_info = CRYPTO_ONCE_STATIC_INIT;
  40
  41 DEFINE_RUN_ONCE_STATIC(init_info_strings)
  42 {
  43 #if defined(OPENSSL_CPUID_OBJ)
  44 # if defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
  45      defined(__x86_64) || defined(__x86_64__) || \
  46      defined(_M_AMD64) || defined(_M_X64)
  47     const char *env;
  48
  49     BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
  50                  CPUINFO_PREFIX "OPENSSL_ia32cap=0x%llx:0x%llx",
  51                  (unsigned long long)OPENSSL_ia32cap_P[0] |
  52                  (unsigned long long)OPENSSL_ia32cap_P[1] << 32,
  53                  (unsigned long long)OPENSSL_ia32cap_P[2] |
  54                  (unsigned long long)OPENSSL_ia32cap_P[3] << 32);
  55     if ((env = getenv("OPENSSL_ia32cap")) != NULL)
  56         BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
  57                      sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
  58                      " env:%s", env);
  59 # elif defined(__arm__) || defined(__arm) || defined(__aarch64__)
  60     const char *env;
  61
  62     BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
  63                  CPUINFO_PREFIX "OPENSSL_armcap=0x%x", OPENSSL_armcap_P);
  64     if ((env = getenv("OPENSSL_armcap")) != NULL)
  65         BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
  66                      sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
  67                      " env:%s", env);
  68 # elif defined(__s390__) || defined(__s390x__)
  69     const char *env;
  70
  71     BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
  72                  CPUINFO_PREFIX "OPENSSL_s390xcap="
  73                  "stfle:0x%llx:0x%llx:0x%llx:0x%llx:"
  74                  "kimd:0x%llx:0x%llx:"
  75                  "klmd:0x%llx:0x%llx:"
  76                  "km:0x%llx:0x%llx:"
  77                  "kmc:0x%llx:0x%llx:"
  78                  "kmac:0x%llx:0x%llx:"
  79                  "kmctr:0x%llx:0x%llx:"
  80                  "kmo:0x%llx:0x%llx:"
  81                  "kmf:0x%llx:0x%llx:"
  82                  "prno:0x%llx:0x%llx:"
  83                  "kma:0x%llx:0x%llx:"
  84                  "pcc:0x%llx:0x%llx:"
  85                  "kdsa:0x%llx:0x%llx",
  86                  OPENSSL_s390xcap_P.stfle[0], OPENSSL_s390xcap_P.stfle[1],
  87                  OPENSSL_s390xcap_P.stfle[2], OPENSSL_s390xcap_P.stfle[3],
  88                  OPENSSL_s390xcap_P.kimd[0], OPENSSL_s390xcap_P.kimd[1],
  89                  OPENSSL_s390xcap_P.klmd[0], OPENSSL_s390xcap_P.klmd[1],
  90                  OPENSSL_s390xcap_P.km[0], OPENSSL_s390xcap_P.km[1],
  91                  OPENSSL_s390xcap_P.kmc[0], OPENSSL_s390xcap_P.kmc[1],
  92                  OPENSSL_s390xcap_P.kmac[0], OPENSSL_s390xcap_P.kmac[1],
  93                  OPENSSL_s390xcap_P.kmctr[0], OPENSSL_s390xcap_P.kmctr[1],
  94                  OPENSSL_s390xcap_P.kmo[0], OPENSSL_s390xcap_P.kmo[1],
  95                  OPENSSL_s390xcap_P.kmf[0], OPENSSL_s390xcap_P.kmf[1],
  96                  OPENSSL_s390xcap_P.prno[0], OPENSSL_s390xcap_P.prno[1],
  97                  OPENSSL_s390xcap_P.kma[0], OPENSSL_s390xcap_P.kma[1],
  98                  OPENSSL_s390xcap_P.pcc[0], OPENSSL_s390xcap_P.pcc[1],
  99                  OPENSSL_s390xcap_P.kdsa[0], OPENSSL_s390xcap_P.kdsa[1]);
 100     if ((env = getenv("OPENSSL_s390xcap")) != NULL)
 101         BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
 102                      sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
 103                      " env:%s", env);
 104 # elif defined(__riscv)
 105     const char *env;
 106     char sep = '=';
 107
 108     BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
 109                  CPUINFO_PREFIX "OPENSSL_riscvcap");
 110     for (size_t i = 0; i < kRISCVNumCaps; ++i) {
 111         if (OPENSSL_riscvcap_P[RISCV_capabilities[i].index]
 112                 & (1 << RISCV_capabilities[i].bit_offset)) {
 113             /* Match, display the name */
 114             BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
 115                          sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
 116                          "%c%s", sep, RISCV_capabilities[i].name);
 117             /* Only the first sep is '=' */
 118             sep = '_';
 119         }
 120     }
 121     /* If no capability is found, add back the = */
 122     if (sep == '=') {
 123         BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
 124                      sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
 125                      "%c", sep);
 126     }
 127     if ((env = getenv("OPENSSL_riscvcap")) != NULL)
 128         BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
 129                      sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
 130                      " env:%s", env);
 131 # endif
 132 #endif
 133
 134     {
 135         static char seeds[512] = "";
 136
 137 #define add_seeds_string(str)                                           \
 138         do {                                                            \
 139             if (seeds[0] != '\0')                                       \
 140                 OPENSSL_strlcat(seeds, " ", sizeof(seeds));             \
 141             OPENSSL_strlcat(seeds, str, sizeof(seeds));                 \
 142         } while (0)
 143 #define add_seeds_stringlist(label, strlist)                            \
 144         do {                                                            \
 145             add_seeds_string(label "(");                                \
 146             {                                                           \
 147                 const char *dev[] =  { strlist, NULL };                 \
 148                 const char **p;                                         \
 149                 int first = 1;                                          \
 150                                                                         \
 151                 for (p = dev; *p != NULL; p++) {                        \
 152                     if (!first)                                         \
 153                         OPENSSL_strlcat(seeds, " ", sizeof(seeds));     \
 154                     first = 0;                                          \
 155                     OPENSSL_strlcat(seeds, *p, sizeof(seeds));          \
 156                 }                                                       \
 157             }                                                           \
 158             OPENSSL_strlcat(seeds, ")", sizeof(seeds));                 \
 159         } while (0)
 160
 161 #ifdef OPENSSL_RAND_SEED_NONE
 162         add_seeds_string("none");
 163 #endif
 164 #ifdef OPENSSL_RAND_SEED_RDTSC
 165         add_seeds_string("rdtsc");
 166 #endif
 167 #ifdef OPENSSL_RAND_SEED_RDCPU
 168 # ifdef __aarch64__
 169         add_seeds_string("rndr ( rndrrs rndr )");
 170 # else
 171         add_seeds_string("rdrand ( rdseed rdrand )");
 172 # endif
 173 #endif
 174 #ifdef OPENSSL_RAND_SEED_LIBRANDOM
 175         add_seeds_string("C-library-random");
 176 #endif
 177 #ifdef OPENSSL_RAND_SEED_GETRANDOM
 178         add_seeds_string("getrandom-syscall");
 179 #endif
 180 #ifdef OPENSSL_RAND_SEED_DEVRANDOM
 181         add_seeds_stringlist("random-device", DEVRANDOM);
 182 #endif
 183 #ifdef OPENSSL_RAND_SEED_EGD
 184         add_seeds_stringlist("EGD", DEVRANDOM_EGD);
 185 #endif
 186 #ifdef OPENSSL_RAND_SEED_OS
 187         add_seeds_string("os-specific");
 188 #endif
 189         seed_sources = seeds;
 190     }
 191     return 1;
 192 }
 193
 194 const char *OPENSSL_info(int t)
 195 {
 196     /*
 197      * We don't care about the result.  Worst case scenario, the strings
 198      * won't be initialised, i.e. remain NULL, which means that the info
 199      * isn't available anyway...
 200      */
 201     (void)RUN_ONCE(&init_info, init_info_strings);
 202
 203     switch (t) {
 204     case OPENSSL_INFO_CONFIG_DIR:
 205         return OPENSSLDIR;
 206     case OPENSSL_INFO_ENGINES_DIR:
 207         return ENGINESDIR;
 208     case OPENSSL_INFO_MODULES_DIR:
 209         return MODULESDIR;
 210     case OPENSSL_INFO_DSO_EXTENSION:
 211         return DSO_EXTENSION;
 212     case OPENSSL_INFO_DIR_FILENAME_SEPARATOR:
 213 #if defined(_WIN32)
 214         return "\\";
 215 #elif defined(__VMS)
 216         return "";
 217 #else  /* Assume POSIX */
 218         return "/";
 219 #endif
 220     case OPENSSL_INFO_LIST_SEPARATOR:
 221         {
 222             static const char list_sep[] = { LIST_SEPARATOR_CHAR, '\0' };
 223             return list_sep;
 224         }
 225     case OPENSSL_INFO_SEED_SOURCE:
 226         return seed_sources;
 227     case OPENSSL_INFO_CPU_SETTINGS:
 228         /*
 229          * If successfully initialized, ossl_cpu_info_str will start
 230          * with CPUINFO_PREFIX, if failed it will be an empty string.
 231          * Strip away the CPUINFO_PREFIX which we don't need here.
 232          */
 233         if (ossl_cpu_info_str[0] != '\0')
 234             return ossl_cpu_info_str + strlen(CPUINFO_PREFIX);
 235         break;
 236     default:
 237         break;
 238     }
 239     /* Not an error */
 240     return NULL;
 241 }