/*

 * Copyright 2019-2025 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 "internal/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(__powerpc__) || defined(__POWERPC__) || defined(_ARCH_PPC)

#include "crypto/ppc_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",

        (unsigned long long)OPENSSL_ia32cap_P[0] | (unsigned long long)OPENSSL_ia32cap_P[1] << 32,

        (unsigned long long)OPENSSL_ia32cap_P[2] | (unsigned 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(__powerpc__) || defined(__POWERPC__) || defined(_ARCH_PPC)

    const char *env;

    BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),

        CPUINFO_PREFIX "OPENSSL_ppccap=0x%x", OPENSSL_ppccap_P);

    if ((env = getenv("OPENSSL_ppccap")) != 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_RDTSC

        add_seeds_string("rdtsc");

#endif

#ifdef OPENSSL_RAND_SEED_RDCPU

#ifdef __aarch64__

        add_seeds_string("rndr ( rndrrs rndr )");

#else

        add_seeds_string("rdrand ( rdseed rdrand )");

#endif

#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;

}