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curl/lib/version.c
Daniel Gustafsson 9a87fe704e version: make ssl_version buffer match for multi_ssl 
When running a multi TLS backend build the version string needs more
buffer space. Make the internal ssl_buffer stack buffer match the one
in Curl_multissl_version() to allow for the longer string. For single
TLS backend builds there is no use in extended to buffer. This is a
fallout from #3863 which fixes up the multi_ssl string generation to
avoid a buffer overflow when the buffer is too small.

Closes #3875
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
2019-05-19 22:06:26 +02:00

468 lines
10 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, 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.haxx.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 "ssh.h"
#include "curl_printf.h"
#ifdef USE_ARES
# if defined(CURL_STATICLIB) && !defined(CARES_STATICLIB) && \
(defined(WIN32) || defined(__SYMBIAN32__))
# 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 USE_LIBSSH2
#include <libssh2.h>
#endif
#ifdef HAVE_LIBSSH2_VERSION
/* get it run-time if possible */
#define CURL_LIBSSH2_VERSION libssh2_version(0)
#else
/* use build-time if run-time not possible */
#define CURL_LIBSSH2_VERSION LIBSSH2_VERSION
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#ifdef __SYMBIAN32__
/* zlib pollutes the namespace with this definition */
#undef WIN32
#endif
#endif
#ifdef HAVE_BROTLI
#include <brotli/decode.h>
#endif
void Curl_version_init(void);
/* For thread safety purposes this function is called by global_init so that
the static data in both version functions is initialized. */
void Curl_version_init(void)
{
curl_version();
curl_version_info(CURLVERSION_NOW);
}
#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
char *curl_version(void)
{
static bool initialized;
static char version[200];
char *ptr = version;
size_t len;
size_t left = sizeof(version);
if(initialized)
return version;
strcpy(ptr, LIBCURL_NAME "/" LIBCURL_VERSION);
len = strlen(ptr);
left -= len;
ptr += len;
if(left > 1) {
len = Curl_ssl_version(ptr + 1, left - 1);
if(len > 0) {
*ptr = ' ';
left -= ++len;
ptr += len;
}
}
#ifdef HAVE_LIBZ
len = msnprintf(ptr, left, " zlib/%s", zlibVersion());
left -= len;
ptr += len;
#endif
#ifdef HAVE_BROTLI
len = msnprintf(ptr, left, "%s", " brotli/");
left -= len;
ptr += len;
len = brotli_version(ptr, left);
left -= len;
ptr += len;
#endif
#ifdef USE_ARES
/* this function is only present in c-ares, not in the original ares */
len = msnprintf(ptr, left, " c-ares/%s", ares_version(NULL));
left -= len;
ptr += len;
#endif
#ifdef USE_LIBIDN2
if(idn2_check_version(IDN2_VERSION)) {
len = msnprintf(ptr, left, " libidn2/%s", idn2_check_version(NULL));
left -= len;
ptr += len;
}
#endif
#ifdef USE_LIBPSL
len = msnprintf(ptr, left, " libpsl/%s", psl_get_version());
left -= len;
ptr += len;
#endif
#ifdef USE_WIN32_IDN
len = msnprintf(ptr, left, " WinIDN");
left -= len;
ptr += len;
#endif
#if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
#ifdef _LIBICONV_VERSION
len = msnprintf(ptr, left, " iconv/%d.%d",
_LIBICONV_VERSION >> 8, _LIBICONV_VERSION & 255);
#else
/* version unknown */
len = msnprintf(ptr, left, " iconv");
#endif /* _LIBICONV_VERSION */
left -= len;
ptr += len;
#endif
#ifdef USE_LIBSSH2
len = msnprintf(ptr, left, " libssh2/%s", CURL_LIBSSH2_VERSION);
left -= len;
ptr += len;
#endif
#ifdef USE_LIBSSH
len = msnprintf(ptr, left, " libssh/%s", CURL_LIBSSH_VERSION);
left -= len;
ptr += len;
#endif
#ifdef USE_NGHTTP2
len = Curl_http2_ver(ptr, left);
left -= len;
ptr += len;
#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(ptr, left, " librtmp/%d.%d%s",
RTMP_LIB_VERSION >> 16, (RTMP_LIB_VERSION >> 8) & 0xff,
suff);
/*
If another lib version is added below this one, this code would
also have to do:
len = what msnprintf() returned
left -= len;
ptr += len;
*/
}
#endif
/* Silent scan-build even if librtmp is not enabled. */
(void) left;
(void) ptr;
initialized = true;
return version;
}
/* 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
#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_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)
"scp",
"sftp",
#endif
#if !defined(CURL_DISABLE_SMB) && defined(USE_NTLM) && \
(CURL_SIZEOF_CURL_OFF_T > 4) && \
(!defined(USE_WINDOWS_SSPI) || defined(USE_WIN32_CRYPTO))
"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 (CURL_SIZEOF_CURL_OFF_T > 4) && \
( (SIZEOF_OFF_T > 4) || defined(USE_WIN32_LARGE_FILES) )
| CURL_VERSION_LARGEFILE
#endif
#if defined(CURL_DOES_CONVERSIONS)
| CURL_VERSION_CONV
#endif
#if defined(USE_TLS_SRP)
| CURL_VERSION_TLSAUTH_SRP
#endif
#if defined(USE_NGHTTP2)
| CURL_VERSION_HTTP2
#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(USE_ALTSVC)
| CURL_VERSION_ALTSVC
#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 */
};
curl_version_info_data *curl_version_info(CURLversion stamp)
{
static bool initialized;
#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
if(initialized)
return &version_info;
#ifdef USE_SSL
Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
version_info.ssl_version = ssl_buffer;
if(Curl_ssl->supports & SSLSUPP_HTTPS_PROXY)
version_info.features |= CURL_VERSION_HTTPS_PROXY;
else
version_info.features &= ~CURL_VERSION_HTTPS_PROXY;
#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_LIBSSH2)
msnprintf(ssh_buffer, sizeof(ssh_buffer), "libssh2/%s", LIBSSH2_VERSION);
version_info.libssh_version = ssh_buffer;
#elif defined(USE_LIBSSH)
msnprintf(ssh_buffer, sizeof(ssh_buffer), "libssh/%s", CURL_LIBSSH_VERSION);
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
(void)stamp; /* avoid compiler warnings, we don't use this */
initialized = true;
return &version_info;
}
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