text: /***************************************************************************
   *                                  _   _ ____  _
   *  Project                     ___| | | |  _ \| |
   *                             / __| | | | |_) | |
   *                            | (__| |_| |  _ <| |___
   *                             \___|\___/|_| \_\_____|
   *
   * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
   *
   * This software is licensed as described in the file COPYING, which
   * you should have received as part of this distribution. The terms
   * are also available at https://curl.se/docs/copyright.html.
   *
   * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   * copies of the Software, and permit persons to whom the Software is
   * furnished to do so, under the terms of the COPYING file.
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   * KIND, either express or implied.
   *
   ***************************************************************************/
  
  #include "curl_setup.h"
  
  #include <curl/curl.h>
  #include "urldata.h"
  #include "vtls/vtls.h"
  #include "http2.h"
  #include "vssh/ssh.h"
  #include "quic.h"
  #include "curl_printf.h"
  
  #ifdef USE_ARES
  #  if defined(CURL_STATICLIB) && !defined(CARES_STATICLIB) &&   \
    defined(WIN32)
  #    define CARES_STATICLIB
  #  endif
  #  include <ares.h>
  #endif
  
  #ifdef USE_LIBIDN2
  #include <idn2.h>
  #endif
  
  #ifdef USE_LIBPSL
  #include <libpsl.h>
  #endif
  
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
  #include <iconv.h>
  #endif
  
  #ifdef USE_LIBRTMP
  #include <librtmp/rtmp.h>
  #endif
  
  #ifdef HAVE_ZLIB_H
  #include <zlib.h>
  #endif
  
  #ifdef HAVE_BROTLI
  #include <brotli/decode.h>
  #endif
  
  #ifdef HAVE_ZSTD
  #include <zstd.h>
  #endif
  
  #ifdef USE_GSASL
  #include <gsasl.h>
  #endif
  
  #ifdef USE_OPENLDAP
  #include <ldap.h>
  #endif
  
  #ifdef HAVE_BROTLI
  static size_t brotli_version(char *buf, size_t bufsz)
  {
    uint32_t brotli_version = BrotliDecoderVersion();
    unsigned int major = brotli_version >> 24;
    unsigned int minor = (brotli_version & 0x00FFFFFF) >> 12;
    unsigned int patch = brotli_version & 0x00000FFF;
  
    return msnprintf(buf, bufsz, "%u.%u.%u", major, minor, patch);
  }
  #endif
  
  #ifdef HAVE_ZSTD
  static size_t zstd_version(char *buf, size_t bufsz)
  {
    unsigned long zstd_version = (unsigned long)ZSTD_versionNumber();
    unsigned int major = (unsigned int)(zstd_version / (100 * 100));
    unsigned int minor = (unsigned int)((zstd_version -
                           (major * 100 * 100)) / 100);
    unsigned int patch = (unsigned int)(zstd_version -
                           (major * 100 * 100) - (minor * 100));
  
    return msnprintf(buf, bufsz, "%u.%u.%u", major, minor, patch);
  }
  #endif
  
  /*
   * curl_version() returns a pointer to a static buffer.
   *
   * It is implemented to work multi-threaded by making sure repeated invokes
   * generate the exact same string and never write any temporary data like
   * zeros in the data.
   */
  
  #define VERSION_PARTS 17 /* number of substrings we can concatenate */
  
  char *curl_version(void)
  {
    static char out[300];
    char *outp;
    size_t outlen;
    const char *src[VERSION_PARTS];
  #ifdef USE_SSL
    char ssl_version[200];
  #endif
  #ifdef HAVE_LIBZ
    char z_version[40];
  #endif
  #ifdef HAVE_BROTLI
    char br_version[40] = "brotli/";
  #endif
  #ifdef HAVE_ZSTD
    char zst_version[40] = "zstd/";
  #endif
  #ifdef USE_ARES
    char cares_version[40];
  #endif
  #if defined(USE_LIBIDN2)
    char idn_version[40];
  #endif
  #ifdef USE_LIBPSL
    char psl_version[40];
  #endif
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
    char iconv_version[40]="iconv";
  #endif
  #ifdef USE_SSH
    char ssh_version[40];
  #endif
  #ifdef USE_NGHTTP2
    char h2_version[40];
  #endif
  #ifdef ENABLE_QUIC
    char h3_version[40];
  #endif
  #ifdef USE_LIBRTMP
    char rtmp_version[40];
  #endif
  #ifdef USE_HYPER
    char hyper_buf[30];
  #endif
  #ifdef USE_GSASL
    char gsasl_buf[30];
  #endif
  #ifdef USE_OPENLDAP
    char ldap_buf[30];
  #endif
    int i = 0;
    int j;
  
  #ifdef DEBUGBUILD
    /* Override version string when environment variable CURL_VERSION is set */
    const char *debugversion = getenv("CURL_VERSION");
    if(debugversion) {
      strncpy(out, debugversion, sizeof(out)-1);
      out[sizeof(out)-1] = '\0';
      return out;
    }
  #endif
  
    src[i++] = LIBCURL_NAME "/" LIBCURL_VERSION;
  #ifdef USE_SSL
    Curl_ssl_version(ssl_version, sizeof(ssl_version));
    src[i++] = ssl_version;
  #endif
  #ifdef HAVE_LIBZ
    msnprintf(z_version, sizeof(z_version), "zlib/%s", zlibVersion());
    src[i++] = z_version;
  #endif
  #ifdef HAVE_BROTLI
    brotli_version(&br_version[7], sizeof(br_version) - 7);
    src[i++] = br_version;
  #endif
  #ifdef HAVE_ZSTD
    zstd_version(&zst_version[5], sizeof(zst_version) - 5);
    src[i++] = zst_version;
  #endif
  #ifdef USE_ARES
    msnprintf(cares_version, sizeof(cares_version),
              "c-ares/%s", ares_version(NULL));
    src[i++] = cares_version;
  #endif
  #ifdef USE_LIBIDN2
    msnprintf(idn_version, sizeof(idn_version),
              "libidn2/%s", idn2_check_version(NULL));
    src[i++] = idn_version;
  #elif defined(USE_WIN32_IDN)
    src[i++] = (char *)"WinIDN";
  #endif
  
  #ifdef USE_LIBPSL
    msnprintf(psl_version, sizeof(psl_version), "libpsl/%s", psl_get_version());
    src[i++] = psl_version;
  #endif
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
  #ifdef _LIBICONV_VERSION
    msnprintf(iconv_version, sizeof(iconv_version), "iconv/%d.%d",
              _LIBICONV_VERSION >> 8, _LIBICONV_VERSION & 255);
  #else
    /* version unknown, let the default stand */
  #endif /* _LIBICONV_VERSION */
    src[i++] = iconv_version;
  #endif
  #ifdef USE_SSH
    Curl_ssh_version(ssh_version, sizeof(ssh_version));
    src[i++] = ssh_version;
  #endif
  #ifdef USE_NGHTTP2
    Curl_http2_ver(h2_version, sizeof(h2_version));
    src[i++] = h2_version;
  #endif
  #ifdef ENABLE_QUIC
    Curl_quic_ver(h3_version, sizeof(h3_version));
    src[i++] = h3_version;
  #endif
  #ifdef USE_LIBRTMP
    {
      char suff[2];
      if(RTMP_LIB_VERSION & 0xff) {
        suff[0] = (RTMP_LIB_VERSION & 0xff) + 'a' - 1;
        suff[1] = '\0';
      }
      else
        suff[0] = '\0';
  
      msnprintf(rtmp_version, sizeof(rtmp_version), "librtmp/%d.%d%s",
                RTMP_LIB_VERSION >> 16, (RTMP_LIB_VERSION >> 8) & 0xff,
                suff);
      src[i++] = rtmp_version;
    }
  #endif
  #ifdef USE_HYPER
    msnprintf(hyper_buf, sizeof(hyper_buf), "Hyper/%s", hyper_version());
    src[i++] = hyper_buf;
  #endif
  #ifdef USE_GSASL
    msnprintf(gsasl_buf, sizeof(gsasl_buf), "libgsasl/%s",
              gsasl_check_version(NULL));
    src[i++] = gsasl_buf;
  #endif
  #ifdef USE_OPENLDAP
    {
      LDAPAPIInfo api;
      api.ldapai_info_version = LDAP_API_INFO_VERSION;
  
      if(ldap_get_option(NULL, LDAP_OPT_API_INFO, &api) == LDAP_OPT_SUCCESS) {
        unsigned int patch = api.ldapai_vendor_version % 100;
        unsigned int major = api.ldapai_vendor_version / 10000;
        unsigned int minor =
          ((api.ldapai_vendor_version - major * 10000) - patch) / 100;
        msnprintf(ldap_buf, sizeof(ldap_buf), "%s/%u.%u.%u",
                  api.ldapai_vendor_name, major, minor, patch);
        src[i++] = ldap_buf;
      }
    }
  #endif
  
    DEBUGASSERT(i <= VERSION_PARTS);
  
    outp = &out[0];
    outlen = sizeof(out);
    for(j = 0; j < i; j++) {
      size_t n = strlen(src[j]);
      /* we need room for a space, the string and the final zero */
      if(outlen <= (n + 2))
        break;
      if(j) {
        /* prepend a space if not the first */
        *outp++ = ' ';
        outlen--;
      }
      memcpy(outp, src[j], n);
      outp += n;
      outlen -= n;
    }
    *outp = 0;
  
    return out;
  }
  
  /* data for curl_version_info
  
     Keep the list sorted alphabetically. It is also written so that each
     protocol line has its own #if line to make things easier on the eye.
   */
  
  static const char * const protocols[] = {
  #ifndef CURL_DISABLE_DICT
    "dict",
  #endif
  #ifndef CURL_DISABLE_FILE
    "file",
  #endif
  #ifndef CURL_DISABLE_FTP
    "ftp",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_FTP)
    "ftps",
  #endif
  #ifndef CURL_DISABLE_GOPHER
    "gopher",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_GOPHER)
    "gophers",
  #endif
  #ifndef CURL_DISABLE_HTTP
    "http",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_HTTP)
    "https",
  #endif
  #ifndef CURL_DISABLE_IMAP
    "imap",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_IMAP)
    "imaps",
  #endif
  #ifndef CURL_DISABLE_LDAP
    "ldap",
  #if !defined(CURL_DISABLE_LDAPS) && \
      ((defined(USE_OPENLDAP) && defined(USE_SSL)) || \
       (!defined(USE_OPENLDAP) && defined(HAVE_LDAP_SSL)))
    "ldaps",
  #endif
  #endif
  #ifndef CURL_DISABLE_MQTT
    "mqtt",
  #endif
  #ifndef CURL_DISABLE_POP3
    "pop3",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_POP3)
    "pop3s",
  #endif
  #ifdef USE_LIBRTMP
    "rtmp",
  #endif
  #ifndef CURL_DISABLE_RTSP
    "rtsp",
  #endif
  #if defined(USE_SSH) && !defined(USE_WOLFSSH)
    "scp",
  #endif
  #ifdef USE_SSH
    "sftp",
  #endif
  #if !defined(CURL_DISABLE_SMB) && defined(USE_CURL_NTLM_CORE) && \
     (SIZEOF_CURL_OFF_T > 4)
    "smb",
  #  ifdef USE_SSL
    "smbs",
  #  endif
  #endif
  #ifndef CURL_DISABLE_SMTP
    "smtp",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_SMTP)
    "smtps",
  #endif
  #ifndef CURL_DISABLE_TELNET
    "telnet",
  #endif
  #ifndef CURL_DISABLE_TFTP
    "tftp",
  #endif
  
    NULL
  };
  
  static curl_version_info_data version_info = {
    CURLVERSION_NOW,
    LIBCURL_VERSION,
    LIBCURL_VERSION_NUM,
    OS, /* as found by configure or set by hand at build-time */
    0 /* features is 0 by default */
  #ifdef ENABLE_IPV6
    | CURL_VERSION_IPV6
  #endif
  #ifdef USE_SSL
    | CURL_VERSION_SSL
  #endif
  #ifdef USE_NTLM
    | CURL_VERSION_NTLM
  #endif
  #if !defined(CURL_DISABLE_HTTP) && defined(USE_NTLM) && \
    defined(NTLM_WB_ENABLED)
    | CURL_VERSION_NTLM_WB
  #endif
  #ifdef USE_SPNEGO
    | CURL_VERSION_SPNEGO
  #endif
  #ifdef USE_KERBEROS5
    | CURL_VERSION_KERBEROS5
  #endif
  #ifdef HAVE_GSSAPI
    | CURL_VERSION_GSSAPI
  #endif
  #ifdef USE_WINDOWS_SSPI
    | CURL_VERSION_SSPI
  #endif
  #ifdef HAVE_LIBZ
    | CURL_VERSION_LIBZ
  #endif
  #ifdef DEBUGBUILD
    | CURL_VERSION_DEBUG
  #endif
  #ifdef CURLDEBUG
    | CURL_VERSION_CURLDEBUG
  #endif
  #ifdef CURLRES_ASYNCH
    | CURL_VERSION_ASYNCHDNS
  #endif
  #if (SIZEOF_CURL_OFF_T > 4) && \
      ( (SIZEOF_OFF_T > 4) || defined(USE_WIN32_LARGE_FILES) )
    | CURL_VERSION_LARGEFILE
  #endif
  #if defined(WIN32) && defined(UNICODE) && defined(_UNICODE)
    | CURL_VERSION_UNICODE
  #endif
  #if defined(CURL_DOES_CONVERSIONS)
    | CURL_VERSION_CONV
  #endif
  #if defined(USE_TLS_SRP)
    | CURL_VERSION_TLSAUTH_SRP
  #endif
  #if defined(USE_NGHTTP2) || defined(USE_HYPER)
    | CURL_VERSION_HTTP2
  #endif
  #if defined(ENABLE_QUIC)
    | CURL_VERSION_HTTP3
  #endif
  #if defined(USE_UNIX_SOCKETS)
    | CURL_VERSION_UNIX_SOCKETS
  #endif
  #if defined(USE_LIBPSL)
    | CURL_VERSION_PSL
  #endif
  #if defined(CURL_WITH_MULTI_SSL)
    | CURL_VERSION_MULTI_SSL
  #endif
  #if defined(HAVE_BROTLI)
    | CURL_VERSION_BROTLI
  #endif
  #if defined(HAVE_ZSTD)
    | CURL_VERSION_ZSTD
  #endif
  #ifndef CURL_DISABLE_ALTSVC
    | CURL_VERSION_ALTSVC
  #endif
  #ifndef CURL_DISABLE_HSTS
    | CURL_VERSION_HSTS
  #endif
  #if defined(USE_GSASL)
    | CURL_VERSION_GSASL
  #endif
    ,
    NULL, /* ssl_version */
    0,    /* ssl_version_num, this is kept at zero */
    NULL, /* zlib_version */
    protocols,
    NULL, /* c-ares version */
    0,    /* c-ares version numerical */
    NULL, /* libidn version */
    0,    /* iconv version */
    NULL, /* ssh lib version */
    0,    /* brotli_ver_num */
    NULL, /* brotli version */
    0,    /* nghttp2 version number */
    NULL, /* nghttp2 version string */
    NULL, /* quic library string */
  #ifdef CURL_CA_BUNDLE
    CURL_CA_BUNDLE, /* cainfo */
  #else
    NULL,
  #endif
  #ifdef CURL_CA_PATH
    CURL_CA_PATH,  /* capath */
  #else
    NULL,
  #endif
    0,    /* zstd_ver_num */
    NULL, /* zstd version */
    NULL, /* Hyper version */
    NULL  /* gsasl version */
  };
  
  curl_version_info_data *curl_version_info(CURLversion stamp)
  {
  #if defined(USE_SSH)
    static char ssh_buffer[80];
  #endif
  #ifdef USE_SSL
  #ifdef CURL_WITH_MULTI_SSL
    static char ssl_buffer[200];
  #else
    static char ssl_buffer[80];
  #endif
  #endif
  #ifdef HAVE_BROTLI
    static char brotli_buffer[80];
  #endif
  #ifdef HAVE_ZSTD
    static char zstd_buffer[80];
  #endif
  
  #ifdef USE_SSL
    Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
    version_info.ssl_version = ssl_buffer;
  #ifndef CURL_DISABLE_PROXY
    if(Curl_ssl->supports & SSLSUPP_HTTPS_PROXY)
      version_info.features |= CURL_VERSION_HTTPS_PROXY;
    else
      version_info.features &= ~CURL_VERSION_HTTPS_PROXY;
  #endif
  #endif
  
  #ifdef HAVE_LIBZ
    version_info.libz_version = zlibVersion();
    /* libz left NULL if non-existing */
  #endif
  #ifdef USE_ARES
    {
      int aresnum;
      version_info.ares = ares_version(&aresnum);
      version_info.ares_num = aresnum;
    }
  #endif
  #ifdef USE_LIBIDN2
    /* This returns a version string if we use the given version or later,
       otherwise it returns NULL */
    version_info.libidn = idn2_check_version(IDN2_VERSION);
    if(version_info.libidn)
      version_info.features |= CURL_VERSION_IDN;
  #elif defined(USE_WIN32_IDN)
    version_info.features |= CURL_VERSION_IDN;
  #endif
  
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
  #ifdef _LIBICONV_VERSION
    version_info.iconv_ver_num = _LIBICONV_VERSION;
  #else
    /* version unknown */
    version_info.iconv_ver_num = -1;
  #endif /* _LIBICONV_VERSION */
  #endif
  
  #if defined(USE_SSH)
    Curl_ssh_version(ssh_buffer, sizeof(ssh_buffer));
    version_info.libssh_version = ssh_buffer;
  #endif
  
  #ifdef HAVE_BROTLI
    version_info.brotli_ver_num = BrotliDecoderVersion();
    brotli_version(brotli_buffer, sizeof(brotli_buffer));
    version_info.brotli_version = brotli_buffer;
  #endif
  
  #ifdef HAVE_ZSTD
    version_info.zstd_ver_num = (unsigned int)ZSTD_versionNumber();
    zstd_version(zstd_buffer, sizeof(zstd_buffer));
    version_info.zstd_version = zstd_buffer;
  #endif
  
  #ifdef USE_NGHTTP2
    {
      nghttp2_info *h2 = nghttp2_version(0);
      version_info.nghttp2_ver_num = h2->version_num;
      version_info.nghttp2_version = h2->version_str;
    }
  #endif
  
  #ifdef ENABLE_QUIC
    {
      static char quicbuffer[80];
      Curl_quic_ver(quicbuffer, sizeof(quicbuffer));
      version_info.quic_version = quicbuffer;
    }
  #endif
  
  #ifdef USE_HYPER
    {
      static char hyper_buffer[30];
      msnprintf(hyper_buffer, sizeof(hyper_buffer), "Hyper/%s", hyper_version());
      version_info.hyper_version = hyper_buffer;
    }
  #endif
  
  #ifdef USE_GSASL
    {
      version_info.gsasl_version = gsasl_check_version(NULL);
    }
  #endif
  
    (void)stamp; /* avoid compiler warnings, we don't use this */
    return &version_info;
  }
  