/*

 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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 <stdio.h>

#include <stdarg.h>

#include <string.h>

#include "crypto/cryptlib.h"

#include "internal/err.h"

#include "crypto/err.h"

#include <openssl/err.h>

#include <openssl/crypto.h>

#include <openssl/buffer.h>

#include <openssl/bio.h>

#include <openssl/opensslconf.h>

#include "internal/thread_once.h"

#include "crypto/ctype.h"

#include "internal/constant_time.h"

#include "e_os.h"

static int err_load_strings(const ERR_STRING_DATA *str);

static void ERR_STATE_free(ERR_STATE *s);

#ifndef OPENSSL_NO_ERR

static ERR_STRING_DATA ERR_str_libraries[] = {

    {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},

    {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},

    {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},

    {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},

    {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},

    {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},

    {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},

    {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},

    {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},

    {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},

    {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},

    {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},

    {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},

    {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},

    {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},

    {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},

    {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},

    {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},

    {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},

    {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},

    {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},

    {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},

    {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},

    {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},

    {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},

    {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},

    {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},

    {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},

    {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},

    {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},

    {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},

    {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},

    {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},

    {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},

    {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},

    {ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"},

    {0, NULL},

};

static ERR_STRING_DATA ERR_str_functs[] = {

    {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},

    {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},

    {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},

    {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},

    {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},

    {ERR_PACK(0, SYS_F_BIND, 0), "bind"},

    {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},

    {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},

# ifdef OPENSSL_SYS_WINDOWS

    {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},

# endif

    {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},

    {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},

    {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},

    {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},

    {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},

    {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},

    {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},

    {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},

    {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},

    {ERR_PACK(0, SYS_F_OPEN, 0), "open"},

    {ERR_PACK(0, SYS_F_CLOSE, 0), "close"},

    {ERR_PACK(0, SYS_F_IOCTL, 0), "ioctl"},

    {ERR_PACK(0, SYS_F_STAT, 0), "stat"},

    {ERR_PACK(0, SYS_F_FCNTL, 0), "fcntl"},

    {ERR_PACK(0, SYS_F_FSTAT, 0), "fstat"},

    {0, NULL},

};

static ERR_STRING_DATA ERR_str_reasons[] = {

    {ERR_R_SYS_LIB, "system lib"},

    {ERR_R_BN_LIB, "BN lib"},

    {ERR_R_RSA_LIB, "RSA lib"},

    {ERR_R_DH_LIB, "DH lib"},

    {ERR_R_EVP_LIB, "EVP lib"},

    {ERR_R_BUF_LIB, "BUF lib"},

    {ERR_R_OBJ_LIB, "OBJ lib"},

    {ERR_R_PEM_LIB, "PEM lib"},

    {ERR_R_DSA_LIB, "DSA lib"},

    {ERR_R_X509_LIB, "X509 lib"},

    {ERR_R_ASN1_LIB, "ASN1 lib"},

    {ERR_R_EC_LIB, "EC lib"},

    {ERR_R_BIO_LIB, "BIO lib"},

    {ERR_R_PKCS7_LIB, "PKCS7 lib"},

    {ERR_R_X509V3_LIB, "X509V3 lib"},

    {ERR_R_ENGINE_LIB, "ENGINE lib"},

    {ERR_R_UI_LIB, "UI lib"},

    {ERR_R_OSSL_STORE_LIB, "STORE lib"},

    {ERR_R_ECDSA_LIB, "ECDSA lib"},

    {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},

    {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},

    {ERR_R_FATAL, "fatal"},

    {ERR_R_MALLOC_FAILURE, "malloc failure"},

    {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,

     "called a function you should not call"},

    {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},

    {ERR_R_INTERNAL_ERROR, "internal error"},

    {ERR_R_DISABLED, "called a function that was disabled at compile-time"},

    {ERR_R_INIT_FAIL, "init fail"},

    {ERR_R_OPERATION_FAIL, "operation fail"},

    {0, NULL},

};

#endif

static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;

static int set_err_thread_local;

static CRYPTO_THREAD_LOCAL err_thread_local;

static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;

static CRYPTO_RWLOCK *err_string_lock;

static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);

/*

 * The internal state

 */

static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;

static int int_err_library_number = ERR_LIB_USER;

static unsigned long get_error_values(int inc, int top, const char **file,

                                      int *line, const char **data,

                                      int *flags);

static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)

{

    unsigned long ret, l;

    l = a->error;

    ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);

    return (ret ^ ret % 19 * 13);

}

static int err_string_data_cmp(const ERR_STRING_DATA *a,

                               const ERR_STRING_DATA *b)

{

    if (a->error == b->error)

        return 0;

    return a->error > b->error ? 1 : -1;

}

static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)

{

    ERR_STRING_DATA *p = NULL;

    CRYPTO_THREAD_read_lock(err_string_lock);

    p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);

    CRYPTO_THREAD_unlock(err_string_lock);

    return p;

}

#ifndef OPENSSL_NO_ERR

/* 2019-05-21: Russian and Ukrainian locales on Linux require more than 6,5 kB */

# define SPACE_SYS_STR_REASONS 8 * 1024

# define NUM_SYS_STR_REASONS 127

static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];

/*

 * SYS_str_reasons is filled with copies of strerror() results at

 * initialization. 'errno' values up to 127 should cover all usual errors,

 * others will be displayed numerically by ERR_error_string. It is crucial

 * that we have something for each reason code that occurs in

 * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),

 * which always gets an errno value and never one of those 'standard' reason

 * codes.

 */

static void build_SYS_str_reasons(void)

{

    /* OPENSSL_malloc cannot be used here, use static storage instead */

    static char strerror_pool[SPACE_SYS_STR_REASONS];

    char *cur = strerror_pool;

    size_t cnt = 0;

    static int init = 1;

    int i;

    int saveerrno = get_last_sys_error();

    CRYPTO_THREAD_write_lock(err_string_lock);

    if (!init) {

        CRYPTO_THREAD_unlock(err_string_lock);

        return;

    }

    for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {

        ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];

        str->error = ERR_PACK(ERR_LIB_SYS, 0, i);

        /*

         * If we have used up all the space in strerror_pool,

         * there's no point in calling openssl_strerror_r()

         */

        if (str->string == NULL && cnt < sizeof(strerror_pool)) {

            if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) {

                size_t l = strlen(cur);

                str->string = cur;

                cnt += l;

                cur += l;

                /*

                 * VMS has an unusual quirk of adding spaces at the end of

                 * some (most? all?) messages. Lets trim them off.

                 */

                while (cur > strerror_pool && ossl_isspace(cur[-1])) {

                    cur--;

                    cnt--;

                }

                *cur++ = '\0';

                cnt++;

            }

        }

        if (str->string == NULL)

            str->string = "unknown";

    }

    /*

     * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as

     * required by ERR_load_strings.

     */

    init = 0;

    CRYPTO_THREAD_unlock(err_string_lock);

    /* openssl_strerror_r could change errno, but we want to preserve it */

    set_sys_error(saveerrno);

    err_load_strings(SYS_str_reasons);

}

#endif

#define err_clear_data(p, i) \

        do { \

            if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) {\

                OPENSSL_free((p)->err_data[i]); \

                (p)->err_data[i] = NULL; \

            } \

            (p)->err_data_flags[i] = 0; \

        } while (0)

#define err_clear(p, i) \

        do { \

            err_clear_data(p, i); \

            (p)->err_flags[i] = 0; \

            (p)->err_buffer[i] = 0; \

            (p)->err_file[i] = NULL; \

            (p)->err_line[i] = -1; \

        } while (0)

static void ERR_STATE_free(ERR_STATE *s)

{

    int i;

    if (s == NULL)

        return;

    for (i = 0; i < ERR_NUM_ERRORS; i++) {

        err_clear_data(s, i);

    }

    OPENSSL_free(s);

}

DEFINE_RUN_ONCE_STATIC(do_err_strings_init)

{

    if (!OPENSSL_init_crypto(0, NULL))

        return 0;

    err_string_lock = CRYPTO_THREAD_lock_new();

    if (err_string_lock == NULL)

        return 0;

    int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,

                                            err_string_data_cmp);

    if (int_error_hash == NULL) {

        CRYPTO_THREAD_lock_free(err_string_lock);

        err_string_lock = NULL;

        return 0;

    }

    return 1;

}

void err_cleanup(void)

{

    if (set_err_thread_local != 0)

        CRYPTO_THREAD_cleanup_local(&err_thread_local);

    CRYPTO_THREAD_lock_free(err_string_lock);

    err_string_lock = NULL;

    lh_ERR_STRING_DATA_free(int_error_hash);

    int_error_hash = NULL;

}

/*

 * Legacy; pack in the library.

 */

static void err_patch(int lib, ERR_STRING_DATA *str)

{

    unsigned long plib = ERR_PACK(lib, 0, 0);

    for (; str->error != 0; str++)

        str->error |= plib;

}

/*

 * Hash in |str| error strings. Assumes the URN_ONCE was done.

 */

static int err_load_strings(const ERR_STRING_DATA *str)

{

    CRYPTO_THREAD_write_lock(err_string_lock);

    for (; str->error; str++)

        (void)lh_ERR_STRING_DATA_insert(int_error_hash,

                                       (ERR_STRING_DATA *)str);

    CRYPTO_THREAD_unlock(err_string_lock);

    return 1;

}

int ERR_load_ERR_strings(void)

{

#ifndef OPENSSL_NO_ERR

    if (!RUN_ONCE(&err_string_init, do_err_strings_init))

        return 0;

    err_load_strings(ERR_str_libraries);

    err_load_strings(ERR_str_reasons);

    err_patch(ERR_LIB_SYS, ERR_str_functs);

    err_load_strings(ERR_str_functs);

    build_SYS_str_reasons();

#endif

    return 1;

}

int ERR_load_strings(int lib, ERR_STRING_DATA *str)

{

    if (ERR_load_ERR_strings() == 0)

        return 0;

    err_patch(lib, str);

    err_load_strings(str);

    return 1;

}

int ERR_load_strings_const(const ERR_STRING_DATA *str)

{

    if (ERR_load_ERR_strings() == 0)

        return 0;

    err_load_strings(str);

    return 1;

}

int ERR_unload_strings(int lib, ERR_STRING_DATA *str)

{

    if (!RUN_ONCE(&err_string_init, do_err_strings_init))

        return 0;

    CRYPTO_THREAD_write_lock(err_string_lock);

    /*

     * We don't need to ERR_PACK the lib, since that was done (to

     * the table) when it was loaded.

     */

    for (; str->error; str++)

        (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);

    CRYPTO_THREAD_unlock(err_string_lock);

    return 1;

}

void err_free_strings_int(void)

{

    if (!RUN_ONCE(&err_string_init, do_err_strings_init))

        return;

}

/********************************************************/

void ERR_put_error(int lib, int func, int reason, const char *file, int line)

{

    ERR_STATE *es;

#ifdef _OSD_POSIX

    /*

     * In the BS2000-OSD POSIX subsystem, the compiler generates path names

     * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to

     * something sensible. @@@ We shouldn't modify a const string, though.

     */

    if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {

        char *end;

        /* Skip the "*POSIX(" prefix */

        file += sizeof("*POSIX(") - 1;

        end = &file[strlen(file) - 1];

        if (*end == ')')

            *end = '\0';

        /* Optional: use the basename of the path only. */

        if ((end = strrchr(file, '/')) != NULL)

            file = &end[1];

    }

#endif

    es = ERR_get_state();

    if (es == NULL)

        return;

    es->top = (es->top + 1) % ERR_NUM_ERRORS;

    if (es->top == es->bottom)

        es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;

    es->err_flags[es->top] = 0;

    es->err_buffer[es->top] = ERR_PACK(lib, func, reason);

    es->err_file[es->top] = file;

    es->err_line[es->top] = line;

    err_clear_data(es, es->top);

}

void ERR_clear_error(void)

{

    int i;

    ERR_STATE *es;

    es = ERR_get_state();

    if (es == NULL)

        return;

    for (i = 0; i < ERR_NUM_ERRORS; i++) {

        err_clear(es, i);

    }

    es->top = es->bottom = 0;

}

unsigned long ERR_get_error(void)

{

    return get_error_values(1, 0, NULL, NULL, NULL, NULL);

}

unsigned long ERR_get_error_line(const char **file, int *line)

{

    return get_error_values(1, 0, file, line, NULL, NULL);

}

unsigned long ERR_get_error_line_data(const char **file, int *line,

                                      const char **data, int *flags)

{

    return get_error_values(1, 0, file, line, data, flags);

}

unsigned long ERR_peek_error(void)

{

    return get_error_values(0, 0, NULL, NULL, NULL, NULL);

}

unsigned long ERR_peek_error_line(const char **file, int *line)

{

    return get_error_values(0, 0, file, line, NULL, NULL);

}

unsigned long ERR_peek_error_line_data(const char **file, int *line,

                                       const char **data, int *flags)

{

    return get_error_values(0, 0, file, line, data, flags);

}

unsigned long ERR_peek_last_error(void)

{

    return get_error_values(0, 1, NULL, NULL, NULL, NULL);

}

unsigned long ERR_peek_last_error_line(const char **file, int *line)

{

    return get_error_values(0, 1, file, line, NULL, NULL);

}

unsigned long ERR_peek_last_error_line_data(const char **file, int *line,

                                            const char **data, int *flags)

{

    return get_error_values(0, 1, file, line, data, flags);

}

static unsigned long get_error_values(int inc, int top, const char **file,

                                      int *line, const char **data,

                                      int *flags)

{

    int i = 0;

    ERR_STATE *es;

    unsigned long ret;

    es = ERR_get_state();

    if (es == NULL)

        return 0;

    if (inc && top) {

        if (file)

            *file = "";

        if (line)

            *line = 0;

        if (data)

            *data = "";

        if (flags)

            *flags = 0;

        return ERR_R_INTERNAL_ERROR;

    }

    while (es->bottom != es->top) {

        if (es->err_flags[es->top] & ERR_FLAG_CLEAR) {

            err_clear(es, es->top);

            es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;

            continue;

        }

        i = (es->bottom + 1) % ERR_NUM_ERRORS;

        if (es->err_flags[i] & ERR_FLAG_CLEAR) {

            es->bottom = i;

            err_clear(es, es->bottom);

            continue;

        }

        break;

    }

    if (es->bottom == es->top)

        return 0;

    if (top)

        i = es->top;            /* last error */

    else

        i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */

    ret = es->err_buffer[i];

    if (inc) {

        es->bottom = i;

        es->err_buffer[i] = 0;

    }

    if (file != NULL && line != NULL) {

        if (es->err_file[i] == NULL) {

            *file = "NA";

            *line = 0;

        } else {

            *file = es->err_file[i];

            *line = es->err_line[i];

        }

    }

    if (data == NULL) {

        if (inc) {

            err_clear_data(es, i);

        }

    } else {

        if (es->err_data[i] == NULL) {

            *data = "";

            if (flags != NULL)

                *flags = 0;

        } else {

            *data = es->err_data[i];

            if (flags != NULL)

                *flags = es->err_data_flags[i];

        }

    }

    return ret;

}

void ERR_error_string_n(unsigned long e, char *buf, size_t len)

{

    char lsbuf[64], fsbuf[64], rsbuf[64];

    const char *ls, *fs, *rs;

    unsigned long l, f, r;

    if (len == 0)

        return;

    l = ERR_GET_LIB(e);

    ls = ERR_lib_error_string(e);

    if (ls == NULL) {

        BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);

        ls = lsbuf;

    }

    fs = ERR_func_error_string(e);

    f = ERR_GET_FUNC(e);

    if (fs == NULL) {

        BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);

        fs = fsbuf;

    }

    rs = ERR_reason_error_string(e);

    r = ERR_GET_REASON(e);

    if (rs == NULL) {

        BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);

        rs = rsbuf;

    }

    BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, fs, rs);

    if (strlen(buf) == len - 1) {

        /* Didn't fit; use a minimal format. */

        BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r);

    }

}

/*

 * ERR_error_string_n should be used instead for ret != NULL as

 * ERR_error_string cannot know how large the buffer is

 */

char *ERR_error_string(unsigned long e, char *ret)

{

    static char buf[256];

    if (ret == NULL)

        ret = buf;

    ERR_error_string_n(e, ret, (int)sizeof(buf));

    return ret;

}

const char *ERR_lib_error_string(unsigned long e)

{

    ERR_STRING_DATA d, *p;

    unsigned long l;

    if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {

        return NULL;

    }

    l = ERR_GET_LIB(e);

    d.error = ERR_PACK(l, 0, 0);

    p = int_err_get_item(&d);

    return ((p == NULL) ? NULL : p->string);

}

const char *ERR_func_error_string(unsigned long e)

{

    ERR_STRING_DATA d, *p;

    unsigned long l, f;

    if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {

        return NULL;

    }

    l = ERR_GET_LIB(e);

    f = ERR_GET_FUNC(e);

    d.error = ERR_PACK(l, f, 0);

    p = int_err_get_item(&d);

    return ((p == NULL) ? NULL : p->string);

}

const char *ERR_reason_error_string(unsigned long e)

{

    ERR_STRING_DATA d, *p = NULL;

    unsigned long l, r;

    if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {

        return NULL;

    }

    l = ERR_GET_LIB(e);

    r = ERR_GET_REASON(e);

    d.error = ERR_PACK(l, 0, r);

    p = int_err_get_item(&d);

    if (!p) {

        d.error = ERR_PACK(0, 0, r);

        p = int_err_get_item(&d);

    }

    return ((p == NULL) ? NULL : p->string);

}

void err_delete_thread_state(void)

{

    ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);

    if (state == NULL)

        return;

    CRYPTO_THREAD_set_local(&err_thread_local, NULL);

    ERR_STATE_free(state);

}

#if OPENSSL_API_COMPAT < 0x10100000L

void ERR_remove_thread_state(void *dummy)

{

}

#endif

#if OPENSSL_API_COMPAT < 0x10000000L

void ERR_remove_state(unsigned long pid)

{

}

#endif

DEFINE_RUN_ONCE_STATIC(err_do_init)

{

    set_err_thread_local = 1;

    return CRYPTO_THREAD_init_local(&err_thread_local, NULL);

}

ERR_STATE *ERR_get_state(void)

{

    ERR_STATE *state;

    int saveerrno = get_last_sys_error();

    if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))

        return NULL;

    if (!RUN_ONCE(&err_init, err_do_init))

        return NULL;

    state = CRYPTO_THREAD_get_local(&err_thread_local);

    if (state == (ERR_STATE*)-1)

        return NULL;

    if (state == NULL) {

        if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))

            return NULL;

        if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) {

            CRYPTO_THREAD_set_local(&err_thread_local, NULL);

            return NULL;

        }

        if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE)

                || !CRYPTO_THREAD_set_local(&err_thread_local, state)) {

            ERR_STATE_free(state);

            CRYPTO_THREAD_set_local(&err_thread_local, NULL);

            return NULL;

        }

        /* Ignore failures from these */

        OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);

    }

    set_sys_error(saveerrno);

    return state;

}

/*

 * err_shelve_state returns the current thread local error state

 * and freezes the error module until err_unshelve_state is called.

 */

int err_shelve_state(void **state)

{

    int saveerrno = get_last_sys_error();

    /*

     * Note, at present our only caller is OPENSSL_init_crypto(), indirectly

     * via ossl_init_load_crypto_nodelete(), by which point the requested

     * "base" initialization has already been performed, so the below call is a

     * NOOP, that re-enters OPENSSL_init_crypto() only to quickly return.

     *

     * If are no other valid callers of this function, the call below can be

     * removed, avoiding the re-entry into OPENSSL_init_crypto().  If there are

     * potential uses that are not from inside OPENSSL_init_crypto(), then this

     * call is needed, but some care is required to make sure that the re-entry

     * remains a NOOP.

     */

    if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))

        return 0;

    if (!RUN_ONCE(&err_init, err_do_init))

        return 0;

    *state = CRYPTO_THREAD_get_local(&err_thread_local);

    if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))

        return 0;

    set_sys_error(saveerrno);

    return 1;

}

/*

 * err_unshelve_state restores the error state that was returned

 * by err_shelve_state previously.

 */

void err_unshelve_state(void* state)

{

    if (state != (void*)-1)

        CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state);

}

int ERR_get_next_error_library(void)

{

    int ret;

    if (!RUN_ONCE(&err_string_init, do_err_strings_init))

        return 0;

    CRYPTO_THREAD_write_lock(err_string_lock);

    ret = int_err_library_number++;

    CRYPTO_THREAD_unlock(err_string_lock);

    return ret;

}

static int err_set_error_data_int(char *data, int flags)

{

    ERR_STATE *es;

    int i;

    es = ERR_get_state();

    if (es == NULL)

        return 0;

    i = es->top;

    err_clear_data(es, i);

    es->err_data[i] = data;

    es->err_data_flags[i] = flags;

    return 1;

}

void ERR_set_error_data(char *data, int flags)

{

    /*

     * This function is void so we cannot propagate the error return. Since it

     * is also in the public API we can't change the return type.

     */

    err_set_error_data_int(data, flags);

}

void ERR_add_error_data(int num, ...)

{

    va_list args;

    va_start(args, num);

    ERR_add_error_vdata(num, args);

    va_end(args);

}

void ERR_add_error_vdata(int num, va_list args)

{

    int i, n, s;

    char *str, *p, *a;

    s = 80;

    if ((str = OPENSSL_malloc(s + 1)) == NULL) {

        /* ERRerr(ERR_F_ERR_ADD_ERROR_VDATA, ERR_R_MALLOC_FAILURE); */

        return;

    }

    str[0] = '\0';

    n = 0;

    for (i = 0; i < num; i++) {

        a = va_arg(args, char *);

        if (a == NULL)

            a = "<NULL>";

        n += strlen(a);

        if (n > s) {

            s = n + 20;

            p = OPENSSL_realloc(str, s + 1);

            if (p == NULL) {

                OPENSSL_free(str);

                return;

            }

            str = p;

        }

        OPENSSL_strlcat(str, a, (size_t)s + 1);

    }

    if (!err_set_error_data_int(str, ERR_TXT_MALLOCED | ERR_TXT_STRING))

        OPENSSL_free(str);

}

int ERR_set_mark(void)

{