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48292d8c93
curl/lib/version.c
Daniel Stenberg 7c8970e95f
version: use msnprintf instead of strncpy 
- to ensure a terminating null byte
- to avoid zero-padding the target

debug code only

Closes #13549
2024-05-08 10:40:58 +02:00

691 lines
17 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 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.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_NGHTTP2
#include <nghttp2/nghttp2.h>
#endif
#include <curl/curl.h>
#include "urldata.h"
#include "vtls/vtls.h"
#include "http2.h"
#include "vssh/ssh.h"
#include "vquic/vquic.h"
#include "curl_printf.h"
#include "easy_lock.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
#ifdef USE_LIBRTMP
#include <librtmp/rtmp.h>
#include "curl_rtmp.h"
#endif
#ifdef HAVE_LIBZ
#include <zlib.h>
#endif
#ifdef HAVE_BROTLI
#if defined(__GNUC__)
/* Ignore -Wvla warnings in brotli headers */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wvla"
#endif
#include <brotli/decode.h>
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#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 void 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;
(void)msnprintf(buf, bufsz, "%u.%u.%u", major, minor, patch);
}
#endif
#ifdef HAVE_ZSTD
static void 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));
(void)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 16 /* 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
#ifdef USE_SSH
char ssh_version[40];
#endif
#ifdef USE_NGHTTP2
char h2_version[40];
#endif
#ifdef USE_HTTP3
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) {
msnprintf(out, sizeof(out), "%s", debugversion);
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";
#elif defined(USE_APPLE_IDN)
src[i++] = (char *)"AppleIDN";
#endif
#ifdef USE_LIBPSL
{
#if defined(PSL_VERSION_MAJOR) && (PSL_VERSION_MAJOR > 0 || \
PSL_VERSION_MINOR >= 11)
int num = psl_check_version_number(0);
msnprintf(psl_version, sizeof(psl_version), "libpsl/%d.%d.%d",
num >> 16, (num >> 8) & 0xff, num & 0xff);
#else
msnprintf(psl_version, sizeof(psl_version), "libpsl/%s",
psl_get_version());
#endif
src[i++] = psl_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 USE_HTTP3
Curl_quic_ver(h3_version, sizeof(h3_version));
src[i++] = h3_version;
#endif
#ifdef USE_LIBRTMP
Curl_rtmp_version(rtmp_version, sizeof(rtmp_version));
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;
ldap_memfree(api.ldapai_vendor_name);
ber_memvfree((void **)api.ldapai_extensions);
}
}
#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 supported_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",
"rtmpe",
"rtmps",
"rtmpt",
"rtmpte",
"rtmpts",
#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)
"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
#ifdef USE_WEBSOCKETS
"ws",
#endif
#if defined(USE_SSL) && defined(USE_WEBSOCKETS)
"wss",
#endif
NULL
};
/*
* Feature presence run-time check functions.
*
* Warning: the value returned by these should not change between
* curl_global_init() and curl_global_cleanup() calls.
*/
#if defined(USE_LIBIDN2)
static int idn_present(curl_version_info_data *info)
{
return info->libidn != NULL;
}
#else
#define idn_present NULL
#endif
#if defined(USE_SSL) && !defined(CURL_DISABLE_PROXY) && \
!defined(CURL_DISABLE_HTTP)
static int https_proxy_present(curl_version_info_data *info)
{
(void) info;
return Curl_ssl_supports(NULL, SSLSUPP_HTTPS_PROXY);
}
#endif
#if defined(USE_SSL) && defined(USE_ECH)
static int ech_present(curl_version_info_data *info)
{
(void) info;
return Curl_ssl_supports(NULL, SSLSUPP_ECH);
}
#endif
/*
* Features table.
*
* Keep the features alphabetically sorted.
* Use FEATURE() macro to define an entry: this allows documentation check.
*/
#define FEATURE(name, present, bitmask) {(name), (present), (bitmask)}
struct feat {
const char *name;
int (*present)(curl_version_info_data *info);
int bitmask;
};
static const struct feat features_table[] = {
#ifndef CURL_DISABLE_ALTSVC
FEATURE("alt-svc", NULL, CURL_VERSION_ALTSVC),
#endif
#ifdef CURLRES_ASYNCH
FEATURE("AsynchDNS", NULL, CURL_VERSION_ASYNCHDNS),
#endif
#ifdef HAVE_BROTLI
FEATURE("brotli", NULL, CURL_VERSION_BROTLI),
#endif
#ifdef DEBUGBUILD
FEATURE("Debug", NULL, CURL_VERSION_DEBUG),
#endif
#if defined(USE_SSL) && defined(USE_ECH)
FEATURE("ECH", ech_present, 0),
#endif
#ifdef USE_GSASL
FEATURE("gsasl", NULL, CURL_VERSION_GSASL),
#endif
#ifdef HAVE_GSSAPI
FEATURE("GSS-API", NULL, CURL_VERSION_GSSAPI),
#endif
#ifndef CURL_DISABLE_HSTS
FEATURE("HSTS", NULL, CURL_VERSION_HSTS),
#endif
#if defined(USE_NGHTTP2)
FEATURE("HTTP2", NULL, CURL_VERSION_HTTP2),
#endif
#if defined(USE_HTTP3)
FEATURE("HTTP3", NULL, CURL_VERSION_HTTP3),
#endif
#if defined(USE_SSL) && !defined(CURL_DISABLE_PROXY) && \
!defined(CURL_DISABLE_HTTP)
FEATURE("HTTPS-proxy", https_proxy_present, CURL_VERSION_HTTPS_PROXY),
#endif
#if defined(USE_LIBIDN2) || defined(USE_WIN32_IDN) || defined(USE_APPLE_IDN)
FEATURE("IDN", idn_present, CURL_VERSION_IDN),
#endif
#ifdef USE_IPV6
FEATURE("IPv6", NULL, CURL_VERSION_IPV6),
#endif
#ifdef USE_KERBEROS5
FEATURE("Kerberos", NULL, CURL_VERSION_KERBEROS5),
#endif
#if (SIZEOF_CURL_OFF_T > 4) && \
( (SIZEOF_OFF_T > 4) || defined(USE_WIN32_LARGE_FILES) )
FEATURE("Largefile", NULL, CURL_VERSION_LARGEFILE),
#endif
#ifdef HAVE_LIBZ
FEATURE("libz", NULL, CURL_VERSION_LIBZ),
#endif
#ifdef CURL_WITH_MULTI_SSL
FEATURE("MultiSSL", NULL, CURL_VERSION_MULTI_SSL),
#endif
#ifdef USE_NTLM
FEATURE("NTLM", NULL, CURL_VERSION_NTLM),
#endif
#if defined(USE_LIBPSL)
FEATURE("PSL", NULL, CURL_VERSION_PSL),
#endif
#ifdef USE_SPNEGO
FEATURE("SPNEGO", NULL, CURL_VERSION_SPNEGO),
#endif
#ifdef USE_SSL
FEATURE("SSL", NULL, CURL_VERSION_SSL),
#endif
#ifdef USE_WINDOWS_SSPI
FEATURE("SSPI", NULL, CURL_VERSION_SSPI),
#endif
#ifdef GLOBAL_INIT_IS_THREADSAFE
FEATURE("threadsafe", NULL, CURL_VERSION_THREADSAFE),
#endif
#ifdef USE_TLS_SRP
FEATURE("TLS-SRP", NULL, CURL_VERSION_TLSAUTH_SRP),
#endif
#ifdef CURLDEBUG
FEATURE("TrackMemory", NULL, CURL_VERSION_CURLDEBUG),
#endif
#if defined(_WIN32) && defined(UNICODE) && defined(_UNICODE)
FEATURE("Unicode", NULL, CURL_VERSION_UNICODE),
#endif
#ifdef USE_UNIX_SOCKETS
FEATURE("UnixSockets", NULL, CURL_VERSION_UNIX_SOCKETS),
#endif
#ifdef HAVE_ZSTD
FEATURE("zstd", NULL, CURL_VERSION_ZSTD),
#endif
{NULL, NULL, 0}
};
static const char *feature_names[sizeof(features_table) /
sizeof(features_table[0])] = {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 bitmask is built at run-time */
NULL, /* ssl_version */
0, /* ssl_version_num, this is kept at zero */
NULL, /* zlib_version */
supported_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 */
feature_names,
NULL /* rtmp version */
};
curl_version_info_data *curl_version_info(CURLversion stamp)
{
size_t n;
const struct feat *p;
int features = 0;
#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
(void)stamp; /* avoid compiler warnings, we don't use this */
#ifdef USE_SSL
Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
version_info.ssl_version = ssl_buffer;
#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);
#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 USE_HTTP3
{
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
/* Get available features, build bitmask and names array. */
n = 0;
for(p = features_table; p->name; p++)
if(!p->present || p->present(&version_info)) {
features |= p->bitmask;
feature_names[n++] = p->name;
}
feature_names[n] = NULL; /* Terminate array. */
version_info.features = features;
#ifdef USE_LIBRTMP
{
static char rtmp_version[30];
Curl_rtmp_version(rtmp_version, sizeof(rtmp_version));
version_info.rtmp_version = rtmp_version;
}
#endif
return &version_info;
}
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