/*

 * Copyright 1999-2021 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

 */

/*

 * Why BIO_s_log?

 *

 * BIO_s_log is useful for system daemons (or services under NT). It is

 * one-way BIO, it sends all stuff to syslogd (on system that commonly use

 * that), or event log (on NT), or OPCOM (on OpenVMS).

 *

 */

#include <stdio.h>

#include <errno.h>

#include "bio_local.h"

#include "internal/cryptlib.h"

#if defined(OPENSSL_SYS_WINCE)

#elif defined(OPENSSL_SYS_WIN32)

#elif defined(OPENSSL_SYS_VMS)

# include <opcdef.h>

# include <descrip.h>

# include <lib$routines.h>

# include <starlet.h>

/* Some compiler options may mask the declaration of "_malloc32". */

# if __INITIAL_POINTER_SIZE && defined _ANSI_C_SOURCE

#  if __INITIAL_POINTER_SIZE == 64

#   pragma pointer_size save

#   pragma pointer_size 32

void *_malloc32(__size_t);

#   pragma pointer_size restore

#  endif                        /* __INITIAL_POINTER_SIZE == 64 */

# endif                         /* __INITIAL_POINTER_SIZE && defined

                                 * _ANSI_C_SOURCE */

#elif defined(__DJGPP__) && defined(OPENSSL_NO_SOCK)

# define NO_SYSLOG

#elif (!defined(MSDOS) || defined(WATT32)) && !defined(OPENSSL_SYS_VXWORKS) && !defined(NO_SYSLOG)

# include <syslog.h>

#endif

#include <openssl/buffer.h>

#include <openssl/err.h>

#ifndef NO_SYSLOG

# if defined(OPENSSL_SYS_WIN32)

#  define LOG_EMERG       0

#  define LOG_ALERT       1

#  define LOG_CRIT        2

#  define LOG_ERR         3

#  define LOG_WARNING     4

#  define LOG_NOTICE      5

#  define LOG_INFO        6

#  define LOG_DEBUG       7

#  define LOG_DAEMON      (3<<3)

# elif defined(OPENSSL_SYS_VMS)

/* On VMS, we don't really care about these, but we need them to compile */

#  define LOG_EMERG       0

#  define LOG_ALERT       1

#  define LOG_CRIT        2

#  define LOG_ERR         3

#  define LOG_WARNING     4

#  define LOG_NOTICE      5

#  define LOG_INFO        6

#  define LOG_DEBUG       7

#  define LOG_DAEMON      OPC$M_NM_NTWORK

# endif

static int slg_write(BIO *h, const char *buf, int num);

static int slg_puts(BIO *h, const char *str);

static long slg_ctrl(BIO *h, int cmd, long arg1, void *arg2);

static int slg_new(BIO *h);

static int slg_free(BIO *data);

static void xopenlog(BIO *bp, char *name, int level);

static void xsyslog(BIO *bp, int priority, const char *string);

static void xcloselog(BIO *bp);

static const BIO_METHOD methods_slg = {

    BIO_TYPE_MEM,

    "syslog",

    bwrite_conv,

    slg_write,

    NULL,                      /* slg_write_old,    */

    NULL,                      /* slg_read,         */

    slg_puts,

    NULL,

    slg_ctrl,

    slg_new,

    slg_free,

    NULL,                      /* slg_callback_ctrl */

};

const BIO_METHOD *BIO_s_log(void)

{

    return &methods_slg;

}

static int slg_new(BIO *bi)

{

    bi->init = 1;

    bi->num = 0;

    bi->ptr = NULL;

    xopenlog(bi, "application", LOG_DAEMON);

    return 1;

}

static int slg_free(BIO *a)

{

    if (a == NULL)

        return 0;

    xcloselog(a);

    return 1;

}

static int slg_write(BIO *b, const char *in, int inl)

{

    int ret = inl;

    char *buf;

    char *pp;

    int priority, i;

    static const struct {

        int strl;

        char str[10];

        int log_level;

    } mapping[] = {

        {

            6, "PANIC ", LOG_EMERG

        },

        {

            6, "EMERG ", LOG_EMERG

        },

        {

            4, "EMR ", LOG_EMERG

        },

        {

            6, "ALERT ", LOG_ALERT

        },

        {

            4, "ALR ", LOG_ALERT

        },

        {

            5, "CRIT ", LOG_CRIT

        },

        {

            4, "CRI ", LOG_CRIT

        },

        {

            6, "ERROR ", LOG_ERR

        },

        {

            4, "ERR ", LOG_ERR

        },

        {

            8, "WARNING ", LOG_WARNING

        },

        {

            5, "WARN ", LOG_WARNING

        },

        {

            4, "WAR ", LOG_WARNING

        },

        {

            7, "NOTICE ", LOG_NOTICE

        },

        {

            5, "NOTE ", LOG_NOTICE

        },

        {

            4, "NOT ", LOG_NOTICE

        },

        {

            5, "INFO ", LOG_INFO

        },

        {

            4, "INF ", LOG_INFO

        },

        {

            6, "DEBUG ", LOG_DEBUG

        },

        {

            4, "DBG ", LOG_DEBUG

        },

        {

            0, "", LOG_ERR

        }

        /* The default */

    };

    if (inl < 0)

        return 0;

    if ((buf = OPENSSL_malloc(inl + 1)) == NULL) {

        ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);

        return 0;

    }

    memcpy(buf, in, inl);

    buf[inl] = '\0';

    i = 0;

    while (strncmp(buf, mapping[i].str, mapping[i].strl) != 0)

        i++;

    priority = mapping[i].log_level;

    pp = buf + mapping[i].strl;

    xsyslog(b, priority, pp);

    OPENSSL_free(buf);

    return ret;

}

static long slg_ctrl(BIO *b, int cmd, long num, void *ptr)

{

    switch (cmd) {

    case BIO_CTRL_SET:

        xcloselog(b);

        xopenlog(b, ptr, num);

        break;

    default:

        break;

    }

    return 0;

}

static int slg_puts(BIO *bp, const char *str)

{

    int n, ret;

    n = strlen(str);

    ret = slg_write(bp, str, n);

    return ret;

}

# if defined(OPENSSL_SYS_WIN32)

static void xopenlog(BIO *bp, char *name, int level)

{

    if (check_winnt())

        bp->ptr = RegisterEventSourceA(NULL, name);

    else

        bp->ptr = NULL;

}

static void xsyslog(BIO *bp, int priority, const char *string)

{

    LPCSTR lpszStrings[2];

    WORD evtype = EVENTLOG_ERROR_TYPE;

    char pidbuf[DECIMAL_SIZE(DWORD) + 4];

    if (bp->ptr == NULL)

        return;

    switch (priority) {

    case LOG_EMERG:

    case LOG_ALERT:

    case LOG_CRIT:

    case LOG_ERR:

        evtype = EVENTLOG_ERROR_TYPE;

        break;

    case LOG_WARNING:

        evtype = EVENTLOG_WARNING_TYPE;

        break;

    case LOG_NOTICE:

    case LOG_INFO:

    case LOG_DEBUG:

        evtype = EVENTLOG_INFORMATION_TYPE;

        break;

    default:

        /*

         * Should never happen, but set it

         * as error anyway.

         */

        evtype = EVENTLOG_ERROR_TYPE;

        break;

    }

    BIO_snprintf(pidbuf, sizeof(pidbuf), "[%lu] ", GetCurrentProcessId());

    lpszStrings[0] = pidbuf;

    lpszStrings[1] = string;

    ReportEventA(bp->ptr, evtype, 0, 1024, NULL, 2, 0, lpszStrings, NULL);

}

static void xcloselog(BIO *bp)

{

    if (bp->ptr)

        DeregisterEventSource((HANDLE) (bp->ptr));

    bp->ptr = NULL;

}

# elif defined(OPENSSL_SYS_VMS)

static int VMS_OPC_target = LOG_DAEMON;

static void xopenlog(BIO *bp, char *name, int level)

{

    VMS_OPC_target = level;

}

static void xsyslog(BIO *bp, int priority, const char *string)

{

    struct dsc$descriptor_s opc_dsc;

/* Arrange 32-bit pointer to opcdef buffer and malloc(), if needed. */

#  if __INITIAL_POINTER_SIZE == 64

#   pragma pointer_size save

#   pragma pointer_size 32

#   define OPCDEF_TYPE __char_ptr32

#   define OPCDEF_MALLOC _malloc32

#  else                         /* __INITIAL_POINTER_SIZE == 64 */

#   define OPCDEF_TYPE char *

#   define OPCDEF_MALLOC OPENSSL_malloc

#  endif                        /* __INITIAL_POINTER_SIZE == 64 [else] */

    struct opcdef *opcdef_p;

#  if __INITIAL_POINTER_SIZE == 64

#   pragma pointer_size restore

#  endif                        /* __INITIAL_POINTER_SIZE == 64 */

    char buf[10240];

    unsigned int len;

    struct dsc$descriptor_s buf_dsc;

    $DESCRIPTOR(fao_cmd, "!AZ: !AZ");

    char *priority_tag;

    switch (priority) {

    case LOG_EMERG:

        priority_tag = "Emergency";

        break;

    case LOG_ALERT:

        priority_tag = "Alert";

        break;

    case LOG_CRIT:

        priority_tag = "Critical";

        break;

    case LOG_ERR:

        priority_tag = "Error";

        break;

    case LOG_WARNING:

        priority_tag = "Warning";

        break;

    case LOG_NOTICE:

        priority_tag = "Notice";

        break;

    case LOG_INFO:

        priority_tag = "Info";

        break;

    case LOG_DEBUG:

        priority_tag = "DEBUG";

        break;

    }

    buf_dsc.dsc$b_dtype = DSC$K_DTYPE_T;

    buf_dsc.dsc$b_class = DSC$K_CLASS_S;

    buf_dsc.dsc$a_pointer = buf;

    buf_dsc.dsc$w_length = sizeof(buf) - 1;

    lib$sys_fao(&fao_cmd, &len, &buf_dsc, priority_tag, string);

    /* We know there's an 8-byte header.  That's documented. */

    opcdef_p = OPCDEF_MALLOC(8 + len);

    opcdef_p->opc$b_ms_type = OPC$_RQ_RQST;

    memcpy(opcdef_p->opc$z_ms_target_classes, &VMS_OPC_target, 3);

    opcdef_p->opc$l_ms_rqstid = 0;

    memcpy(&opcdef_p->opc$l_ms_text, buf, len);

    opc_dsc.dsc$b_dtype = DSC$K_DTYPE_T;

    opc_dsc.dsc$b_class = DSC$K_CLASS_S;

    opc_dsc.dsc$a_pointer = (OPCDEF_TYPE) opcdef_p;

    opc_dsc.dsc$w_length = len + 8;

    sys$sndopr(opc_dsc, 0);

    OPENSSL_free(opcdef_p);

}

static void xcloselog(BIO *bp)

{

}

# else                          /* Unix/Watt32 */

static void xopenlog(BIO *bp, char *name, int level)

{

#  ifdef WATT32                 /* djgpp/DOS */

    openlog(name, LOG_PID | LOG_CONS | LOG_NDELAY, level);

#  else

    openlog(name, LOG_PID | LOG_CONS, level);

#  endif

}

static void xsyslog(BIO *bp, int priority, const char *string)

{

    syslog(priority, "%s", string);

}

static void xcloselog(BIO *bp)

{

    closelog();

}

# endif                         /* Unix */

#else                           /* NO_SYSLOG */

const BIO_METHOD *BIO_s_log(void)

{

    return NULL;

}

#endif                          /* NO_SYSLOG */