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openssl/crypto/info.c

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/*
* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 <openssl/crypto.h>
#include "crypto/rand.h"
#include "crypto/dso_conf.h"
#include "internal/thread_once.h"
#include "internal/cryptlib.h"
#include "e_os.h"
#include "buildinf.h"
#if defined(__arm__) || defined(__arm) || defined(__aarch64__)
# include "arm_arch.h"
# define CPU_INFO_STR_LEN 128
#elif defined(__s390__) || defined(__s390x__)
# include "s390x_arch.h"
# define CPU_INFO_STR_LEN 2048
#else
# define CPU_INFO_STR_LEN 128
#endif
/* extern declaration to avoid warning */
extern char ossl_cpu_info_str[];
static char *seed_sources = NULL;
char ossl_cpu_info_str[CPU_INFO_STR_LEN] = "";
#define CPUINFO_PREFIX "CPUINFO: "
static CRYPTO_ONCE init_info = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(init_info_strings)
{
#if defined(OPENSSL_CPUID_OBJ)
# if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
defined(__x86_64) || defined(__x86_64__) || \
defined(_M_AMD64) || defined(_M_X64)
const char *env;
BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
CPUINFO_PREFIX "OPENSSL_ia32cap=0x%llx:0x%llx",
(long long)OPENSSL_ia32cap_P[0] |
(long long)OPENSSL_ia32cap_P[1] << 32,
(long long)OPENSSL_ia32cap_P[2] |
(long long)OPENSSL_ia32cap_P[3] << 32);
if ((env = getenv("OPENSSL_ia32cap")) != NULL)
BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
" env:%s", env);
# elif defined(__arm__) || defined(__arm) || defined(__aarch64__)
const char *env;
BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
CPUINFO_PREFIX "OPENSSL_armcap=0x%x", OPENSSL_armcap_P);
if ((env = getenv("OPENSSL_armcap")) != NULL)
BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
" env:%s", env);
# elif defined(__s390__) || defined(__s390x__)
const char *env;
BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),
CPUINFO_PREFIX "OPENSSL_s390xcap="
"stfle:0x%llx:0x%llx:0x%llx:0x%llx:"
"kimd:0x%llx:0x%llx:"
"klmd:0x%llx:0x%llx:"
"km:0x%llx:0x%llx:"
"kmc:0x%llx:0x%llx:"
"kmac:0x%llx:0x%llx:"
"kmctr:0x%llx:0x%llx:"
"kmo:0x%llx:0x%llx:"
"kmf:0x%llx:0x%llx:"
"prno:0x%llx:0x%llx:"
"kma:0x%llx:0x%llx:"
"pcc:0x%llx:0x%llx:"
"kdsa:0x%llx:0x%llx",
OPENSSL_s390xcap_P.stfle[0], OPENSSL_s390xcap_P.stfle[1],
OPENSSL_s390xcap_P.stfle[2], OPENSSL_s390xcap_P.stfle[3],
OPENSSL_s390xcap_P.kimd[0], OPENSSL_s390xcap_P.kimd[1],
OPENSSL_s390xcap_P.klmd[0], OPENSSL_s390xcap_P.klmd[1],
OPENSSL_s390xcap_P.km[0], OPENSSL_s390xcap_P.km[1],
OPENSSL_s390xcap_P.kmc[0], OPENSSL_s390xcap_P.kmc[1],
OPENSSL_s390xcap_P.kmac[0], OPENSSL_s390xcap_P.kmac[1],
OPENSSL_s390xcap_P.kmctr[0], OPENSSL_s390xcap_P.kmctr[1],
OPENSSL_s390xcap_P.kmo[0], OPENSSL_s390xcap_P.kmo[1],
OPENSSL_s390xcap_P.kmf[0], OPENSSL_s390xcap_P.kmf[1],
OPENSSL_s390xcap_P.prno[0], OPENSSL_s390xcap_P.prno[1],
OPENSSL_s390xcap_P.kma[0], OPENSSL_s390xcap_P.kma[1],
OPENSSL_s390xcap_P.pcc[0], OPENSSL_s390xcap_P.pcc[1],
OPENSSL_s390xcap_P.kdsa[0], OPENSSL_s390xcap_P.kdsa[1]);
if ((env = getenv("OPENSSL_s390xcap")) != NULL)
BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),
sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),
" env:%s", env);
# endif
#endif
{
static char seeds[512] = "";
#define add_seeds_string(str) \
do { \
if (seeds[0] != '\0') \
OPENSSL_strlcat(seeds, " ", sizeof(seeds)); \
OPENSSL_strlcat(seeds, str, sizeof(seeds)); \
} while (0)
#define add_seeds_stringlist(label, strlist) \
do { \
add_seeds_string(label "("); \
{ \
const char *dev[] = { strlist, NULL }; \
const char **p; \
int first = 1; \
\
for (p = dev; *p != NULL; p++) { \
if (!first) \
OPENSSL_strlcat(seeds, " ", sizeof(seeds)); \
first = 0; \
OPENSSL_strlcat(seeds, *p, sizeof(seeds)); \
} \
} \
OPENSSL_strlcat(seeds, ")", sizeof(seeds)); \
} while (0)
#ifdef OPENSSL_RAND_SEED_NONE
add_seeds_string("none");
#endif
#ifdef OPENSSL_RAND_SEED_RTDSC
add_seeds_string("stdsc");
#endif
#ifdef OPENSSL_RAND_SEED_RDCPU
add_seeds_string("rdrand ( rdseed rdrand )");
#endif
#ifdef OPENSSL_RAND_SEED_LIBRANDOM
add_seeds_string("C-library-random");
#endif
#ifdef OPENSSL_RAND_SEED_GETRANDOM
add_seeds_string("getrandom-syscall");
#endif
#ifdef OPENSSL_RAND_SEED_DEVRANDOM
add_seeds_stringlist("random-device", DEVRANDOM);
#endif
#ifdef OPENSSL_RAND_SEED_EGD
add_seeds_stringlist("EGD", DEVRANDOM_EGD);
#endif
#ifdef OPENSSL_RAND_SEED_OS
add_seeds_string("os-specific");
#endif
seed_sources = seeds;
}
return 1;
}
const char *OPENSSL_info(int t)
{
/*
* We don't care about the result. Worst case scenario, the strings
* won't be initialised, i.e. remain NULL, which means that the info
* isn't available anyway...
*/
(void)RUN_ONCE(&init_info, init_info_strings);
switch (t) {
case OPENSSL_INFO_CONFIG_DIR:
return OPENSSLDIR;
case OPENSSL_INFO_ENGINES_DIR:
return ENGINESDIR;
case OPENSSL_INFO_MODULES_DIR:
return MODULESDIR;
case OPENSSL_INFO_DSO_EXTENSION:
return DSO_EXTENSION;
case OPENSSL_INFO_DIR_FILENAME_SEPARATOR:
#if defined(_WIN32)
return "\\";
#elif defined(__VMS)
return "";
#else /* Assume POSIX */
return "/";
#endif
case OPENSSL_INFO_LIST_SEPARATOR:
{
static const char list_sep[] = { LIST_SEPARATOR_CHAR, '\0' };
return list_sep;
}
case OPENSSL_INFO_SEED_SOURCE:
return seed_sources;
case OPENSSL_INFO_CPU_SETTINGS:
/*
* If successfully initialized, ossl_cpu_info_str will start
* with CPUINFO_PREFIX, if failed it will be an empty string.
* Strip away the CPUINFO_PREFIX which we don't need here.
*/
if (ossl_cpu_info_str[0] != '\0')
return ossl_cpu_info_str + strlen(CPUINFO_PREFIX);
break;
default:
break;
}
/* Not an error */
return NULL;
}
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