/*

 * Copyright 2019-2023 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(__s390__) || defined(__s390x__)

# include "s390x_arch.h"

# define CPU_INFO_STR_LEN 2048

#elif defined(__riscv)

# include "crypto/riscv_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(__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);

# elif defined(__riscv)

    const char *env;

    char sep = '=';

    BIO_snprintf(ossl_cpu_info_str, sizeof(ossl_cpu_info_str),

                 CPUINFO_PREFIX "OPENSSL_riscvcap");

    for (size_t i = 0; i < kRISCVNumCaps; ++i) {

        if (OPENSSL_riscvcap_P[RISCV_capabilities[i].index]

                & (1 << RISCV_capabilities[i].bit_offset)) {

            /* Match, display the name */

            BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),

                         sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),

                         "%c%s", sep, RISCV_capabilities[i].name);

            /* Only the first sep is '=' */

            sep = '_';

        }

    }

    /* If no capability is found, add back the = */

    if (sep == '=') {

        BIO_snprintf(ossl_cpu_info_str + strlen(ossl_cpu_info_str),

                     sizeof(ossl_cpu_info_str) - strlen(ossl_cpu_info_str),

                     "%c", sep);

    }

    if ((env = getenv("OPENSSL_riscvcap")) != 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;

}