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2c0d65785f
curl/src/tool_setopt.c
Daniel Stenberg 7f963a19ec checksrc: ban unsafe functions 
The list of unsafe functions currently consists of sprintf, vsprintf,
strcat, strncat and gets.

Subsequently, some existing code needed updating to avoid warnings on
this.
2013-03-07 11:08:05 +01:00

546 lines
15 KiB
C
Raw Blame History

/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2013, 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 http://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 "tool_setup.h"
#ifndef CURL_DISABLE_LIBCURL_OPTION
#define ENABLE_CURLX_PRINTF
/* use our own printf() functions */
#include "curlx.h"
#include "tool_cfgable.h"
#include "tool_easysrc.h"
#include "tool_setopt.h"
#include "memdebug.h" /* keep this as LAST include */
/* Lookup tables for converting setopt values back to symbols */
/* For enums, values may be in any order. */
/* For bit masks, put combinations first, then single bits, */
/* and finally any "NONE" value. */
#define NV(e) {#e, e}
#define NV1(e, v) {#e, (v)}
#define NVEND {NULL, 0} /* sentinel to mark end of list */
const NameValue setopt_nv_CURLPROXY[] = {
NV(CURLPROXY_HTTP),
NV(CURLPROXY_HTTP_1_0),
NV(CURLPROXY_SOCKS4),
NV(CURLPROXY_SOCKS5),
NV(CURLPROXY_SOCKS4A),
NV(CURLPROXY_SOCKS5_HOSTNAME),
NVEND,
};
const NameValueUnsigned setopt_nv_CURLAUTH[] = {
NV(CURLAUTH_ANY), /* combination */
NV(CURLAUTH_ANYSAFE), /* combination */
NV(CURLAUTH_BASIC),
NV(CURLAUTH_DIGEST),
NV(CURLAUTH_GSSNEGOTIATE),
NV(CURLAUTH_NTLM),
NV(CURLAUTH_DIGEST_IE),
NV(CURLAUTH_NTLM_WB),
NV(CURLAUTH_ONLY),
NV(CURLAUTH_NONE),
NVEND,
};
const NameValue setopt_nv_CURL_HTTP_VERSION[] = {
NV(CURL_HTTP_VERSION_NONE),
NV(CURL_HTTP_VERSION_1_0),
NV(CURL_HTTP_VERSION_1_1),
NVEND,
};
const NameValue setopt_nv_CURL_SSLVERSION[] = {
NV(CURL_SSLVERSION_DEFAULT),
NV(CURL_SSLVERSION_TLSv1),
NV(CURL_SSLVERSION_SSLv2),
NV(CURL_SSLVERSION_SSLv3),
NVEND,
};
const NameValue setopt_nv_CURL_TIMECOND[] = {
NV(CURL_TIMECOND_IFMODSINCE),
NV(CURL_TIMECOND_IFUNMODSINCE),
NV(CURL_TIMECOND_LASTMOD),
NV(CURL_TIMECOND_NONE),
NVEND,
};
const NameValue setopt_nv_CURLFTPSSL_CCC[] = {
NV(CURLFTPSSL_CCC_NONE),
NV(CURLFTPSSL_CCC_PASSIVE),
NV(CURLFTPSSL_CCC_ACTIVE),
NVEND,
};
/* These mappings essentially triplicated - see
* tool_libinfo.c and tool_paramhlp.c */
const NameValue setopt_nv_CURLPROTO[] = {
NV(CURLPROTO_ALL), /* combination */
NV(CURLPROTO_DICT),
NV(CURLPROTO_FILE),
NV(CURLPROTO_FTP),
NV(CURLPROTO_FTPS),
NV(CURLPROTO_GOPHER),
NV(CURLPROTO_HTTP),
NV(CURLPROTO_HTTPS),
NV(CURLPROTO_IMAP),
NV(CURLPROTO_IMAPS),
NV(CURLPROTO_LDAP),
NV(CURLPROTO_LDAPS),
NV(CURLPROTO_POP3),
NV(CURLPROTO_POP3S),
NV(CURLPROTO_RTSP),
NV(CURLPROTO_SCP),
NV(CURLPROTO_SFTP),
NV(CURLPROTO_SMTP),
NV(CURLPROTO_SMTPS),
NV(CURLPROTO_TELNET),
NV(CURLPROTO_TFTP),
NVEND,
};
/* These options have non-zero default values. */
static const NameValue setopt_nv_CURLNONZERODEFAULTS[] = {
NV1(CURLOPT_SSL_VERIFYPEER, 1),
NV1(CURLOPT_SSL_VERIFYHOST, 1),
NVEND
};
/* Format and add code; jump to nomem on malloc error */
#define ADD(args) do { \
ret = easysrc_add args; \
if(ret) \
goto nomem; \
} WHILE_FALSE
#define ADDF(args) do { \
ret = easysrc_addf args; \
if(ret) \
goto nomem; \
} WHILE_FALSE
#define DECL0(s) ADD((&easysrc_decl, s))
#define DECL1(f,a) ADDF((&easysrc_decl, f,a))
#define DATA0(s) ADD((&easysrc_data, s))
#define DATA1(f,a) ADDF((&easysrc_data, f,a))
#define DATA2(f,a,b) ADDF((&easysrc_data, f,a,b))
#define DATA3(f,a,b,c) ADDF((&easysrc_data, f,a,b,c))
#define CODE0(s) ADD((&easysrc_code, s))
#define CODE1(f,a) ADDF((&easysrc_code, f,a))
#define CODE2(f,a,b) ADDF((&easysrc_code, f,a,b))
#define CODE3(f,a,b,c) ADDF((&easysrc_code, f,a,b,c))
#define CLEAN0(s) ADD((&easysrc_clean, s))
#define CLEAN1(f,a) ADDF((&easysrc_clean, f,a))
#define REM0(s) ADD((&easysrc_toohard, s))
#define REM1(f,a) ADDF((&easysrc_toohard, f,a))
#define REM2(f,a,b) ADDF((&easysrc_toohard, f,a,b))
/* Escape string to C string syntax. Return NULL if out of memory.
* Is this correct for those wacky EBCDIC guys? */
static char *c_escape(const char *str)
{
size_t len = 0;
const char *s;
unsigned char c;
char *escaped, *e;
/* Allocate space based on worst-case */
len = strlen(str);
escaped = malloc(4 * len + 1);
if(!escaped)
return NULL;
e = escaped;
for(s=str; (c=*s) != '\0'; s++) {
if(c=='\n') {
strcpy(e, "\\n");
e += 2;
}
else if(c=='\r') {
strcpy(e, "\\r");
e += 2;
}
else if(c=='\t') {
strcpy(e, "\\t");
e += 2;
}
else if(c=='\\') {
strcpy(e, "\\\\");
e += 2;
}
else if(c=='"') {
strcpy(e, "\\\"");
e += 2;
}
else if(! isprint(c)) {
snprintf(e, 4, "\\%03o", c);
e += 4;
}
else
*e++ = c;
}
*e = '\0';
return escaped;
}
/* setopt wrapper for enum types */
CURLcode tool_setopt_enum(CURL *curl, struct Configurable *config,
const char *name, CURLoption tag,
const NameValue *nvlist, long lval)
{
CURLcode ret = CURLE_OK;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, lval);
if(!lval)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
const NameValue *nv = NULL;
for(nv=nvlist; nv->name; nv++) {
if(nv->value == lval) break; /* found it */
}
if(! nv->name) {
/* If no definition was found, output an explicit value.
* This could happen if new values are defined and used
* but the NameValue list is not updated. */
CODE2("curl_easy_setopt(hnd, %s, %ldL);", name, lval);
}
else {
CODE2("curl_easy_setopt(hnd, %s, (long)%s);", name, nv->name);
}
}
nomem:
return ret;
}
/* setopt wrapper for flags */
CURLcode tool_setopt_flags(CURL *curl, struct Configurable *config,
const char *name, CURLoption tag,
const NameValue *nvlist, long lval)
{
CURLcode ret = CURLE_OK;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, lval);
if(!lval)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
char preamble[80]; /* should accommodate any symbol name */
long rest = lval; /* bits not handled yet */
const NameValue *nv = NULL;
snprintf(preamble, sizeof(preamble),
"curl_easy_setopt(hnd, %s, ", name);
for(nv=nvlist; nv->name; nv++) {
if((nv->value & ~ rest) == 0) {
/* all value flags contained in rest */
rest &= ~ nv->value; /* remove bits handled here */
CODE3("%s(long)%s%s",
preamble, nv->name, rest ? " |" : ");");
if(!rest)
break; /* handled them all */
/* replace with all spaces for continuation line */
snprintf(preamble, sizeof(preamble), "%*s", strlen(preamble), "");
}
}
/* If any bits have no definition, output an explicit value.
* This could happen if new bits are defined and used
* but the NameValue list is not updated. */
if(rest)
CODE2("%s%ldL);", preamble, rest);
}
nomem:
return ret;
}
/* setopt wrapper for bitmasks */
CURLcode tool_setopt_bitmask(CURL *curl, struct Configurable *config,
const char *name, CURLoption tag,
const NameValueUnsigned *nvlist,
long lval)
{
CURLcode ret = CURLE_OK;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, lval);
if(!lval)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
char preamble[80];
unsigned long rest = (unsigned long)lval;
const NameValueUnsigned *nv = NULL;
snprintf(preamble, sizeof(preamble),
"curl_easy_setopt(hnd, %s, ", name);
for(nv=nvlist; nv->name; nv++) {
if((nv->value & ~ rest) == 0) {
/* all value flags contained in rest */
rest &= ~ nv->value; /* remove bits handled here */
CODE3("%s(long)%s%s",
preamble, nv->name, rest ? " |" : ");");
if(!rest)
break; /* handled them all */
/* replace with all spaces for continuation line */
snprintf(preamble, sizeof(preamble), "%*s", strlen(preamble), "");
}
}
/* If any bits have no definition, output an explicit value.
* This could happen if new bits are defined and used
* but the NameValue list is not updated. */
if(rest)
CODE2("%s%luUL);", preamble, rest);
}
nomem:
return ret;
}
/* setopt wrapper for CURLOPT_HTTPPOST */
CURLcode tool_setopt_httppost(CURL *curl, struct Configurable *config,
const char *name, CURLoption tag,
struct curl_httppost *post)
{
CURLcode ret = CURLE_OK;
char *escaped = NULL;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, post);
if(!post)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
struct curl_httppost *pp, *p;
int i;
/* May use several httppost lists, if multiple POST actions */
i = ++ easysrc_form_count;
DECL1("struct curl_httppost *post%d;", i);
DATA1("post%d = NULL;", i);
CLEAN1("curl_formfree(post%d);", i);
CLEAN1("post%d = NULL;", i);
if(i == 1)
DECL0("struct curl_httppost *postend;");
DATA0("postend = NULL;");
for(p=post; p; p=p->next) {
DATA1("curl_formadd(&post%d, &postend,", i);
DATA1(" CURLFORM_COPYNAME, \"%s\",", p->name);
for(pp=p; pp; pp=pp->more) {
/* May be several files uploaded for one name;
* these are linked through the 'more' pointer */
Curl_safefree(escaped);
escaped = c_escape(pp->contents);
if(!escaped) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
if(pp->flags & HTTPPOST_FILENAME) {
/* file upload as for -F @filename */
DATA1(" CURLFORM_FILE, \"%s\",", escaped);
}
else if(pp->flags & HTTPPOST_READFILE) {
/* content from file as for -F <filename */
DATA1(" CURLFORM_FILECONTENT, \"%s\",", escaped);
}
else
DATA1(" CURLFORM_COPYCONTENTS, \"%s\",", escaped);
if(pp->showfilename) {
Curl_safefree(escaped);
escaped = c_escape(pp->showfilename);
if(!escaped) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
DATA1(" CURLFORM_FILENAME, \"%s\",", escaped);
}
if(pp->contenttype) {
Curl_safefree(escaped);
escaped = c_escape(pp->contenttype);
if(!escaped) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
DATA1(" CURLFORM_CONTENTTYPE, \"%s\",", escaped);
}
}
DATA0(" CURLFORM_END);");
}
CODE2("curl_easy_setopt(hnd, %s, post%d);", name, i);
}
nomem:
Curl_safefree(escaped);
return ret;
}
/* setopt wrapper for curl_slist options */
CURLcode tool_setopt_slist(CURL *curl, struct Configurable *config,
const char *name, CURLoption tag,
struct curl_slist *list)
{
CURLcode ret = CURLE_OK;
char *escaped = NULL;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, list);
if(!list)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
struct curl_slist *s;
int i;
/* May need several slist variables, so invent name */
i = ++ easysrc_slist_count;
DECL1("struct curl_slist *slist%d;", i);
DATA1("slist%d = NULL;", i);
CLEAN1("curl_slist_free_all(slist%d);", i);
CLEAN1("slist%d = NULL;", i);
for(s=list; s; s=s->next) {
Curl_safefree(escaped);
escaped = c_escape(s->data);
if(!escaped) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
DATA3("slist%d = curl_slist_append(slist%d, \"%s\");", i, i, escaped);
}
CODE2("curl_easy_setopt(hnd, %s, slist%d);", name, i);
}
nomem:
Curl_safefree(escaped);
return ret;
}
/* generic setopt wrapper for all other options.
* Some type information is encoded in the tag value. */
CURLcode tool_setopt(CURL *curl, bool str, struct Configurable *config,
const char *name, CURLoption tag, ...)
{
va_list arg;
char buf[256];
const char *value = NULL;
bool remark = FALSE;
bool skip = FALSE;
bool escape = FALSE;
char *escaped = NULL;
CURLcode ret = CURLE_OK;
va_start(arg, tag);
if(tag < CURLOPTTYPE_OBJECTPOINT) {
/* Value is expected to be a long */
long lval = va_arg(arg, long);
long defval = 0L;
const NameValue *nv = NULL;
for(nv=setopt_nv_CURLNONZERODEFAULTS; nv->name; nv++) {
if(!strcmp(name, nv->name)) {
defval = nv->value;
break; /* found it */
}
}
snprintf(buf, sizeof(buf), "%ldL", lval);
value = buf;
ret = curl_easy_setopt(curl, tag, lval);
if(lval == defval)
skip = TRUE;
}
else if(tag < CURLOPTTYPE_OFF_T) {
/* Value is some sort of object pointer */
void *pval = va_arg(arg, void *);
/* function pointers are never printable */
if(tag >= CURLOPTTYPE_FUNCTIONPOINT) {
if(pval) {
value = "functionpointer";
remark = TRUE;
}
else
skip = TRUE;
}
else if(pval && str) {
value = (char *)pval;
escape = TRUE;
}
else if(pval) {
value = "objectpointer";
remark = TRUE;
}
else
skip = TRUE;
ret = curl_easy_setopt(curl, tag, pval);
}
else {
/* Value is expected to be curl_off_t */
curl_off_t oval = va_arg(arg, curl_off_t);
snprintf(buf, sizeof(buf),
"(curl_off_t)%" CURL_FORMAT_CURL_OFF_T, oval);
value = buf;
ret = curl_easy_setopt(curl, tag, oval);
if(!oval)
skip = TRUE;
}
va_end(arg);
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
if(remark)
REM2("%s set to a %s", name, value);
else {
if(escape) {
escaped = c_escape(value);
if(!escaped) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
CODE2("curl_easy_setopt(hnd, %s, \"%s\");", name, escaped);
}
else
CODE2("curl_easy_setopt(hnd, %s, %s);", name, value);
}
}
nomem:
Curl_safefree(escaped);
return ret;
}
#endif /* CURL_DISABLE_LIBCURL_OPTION */
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