curl/lib/netrc.c
Jay Satiro e8423f9ce1 curl_setup: Add macros for FOPEN_READTEXT, FOPEN_WRITETEXT
- Change fopen calls to use FOPEN_READTEXT instead of "r" or "rt"
- Change fopen calls to use FOPEN_WRITETEXT instead of "w" or "wt"

This change is to explicitly specify when we need to read/write text.
Unfortunately 't' is not part of POSIX fopen so we can't specify it
directly. Instead we now have FOPEN_READTEXT, FOPEN_WRITETEXT.

Prior to this change we had an issue on Windows if an application that
uses libcurl overrides the default file mode to binary. The default file
mode in Windows is normally text mode (translation mode) and that's what
libcurl expects.

Bug: https://github.com/bagder/curl/pull/258#issuecomment-107093055
Reported-by: Orgad Shaneh
2015-06-01 03:21:23 -04:00

204 lines
5.7 KiB
C

/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2015, 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 "curl_setup.h"
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <curl/curl.h>
#include "netrc.h"
#include "strequal.h"
#include "strtok.h"
#include "rawstr.h"
#include "curl_printf.h"
/* The last #include files should be: */
#include "curl_memory.h"
#include "memdebug.h"
/* Get user and password from .netrc when given a machine name */
enum host_lookup_state {
NOTHING,
HOSTFOUND, /* the 'machine' keyword was found */
HOSTVALID /* this is "our" machine! */
};
/*
* @unittest: 1304
*
* *loginp and *passwordp MUST be allocated if they aren't NULL when passed
* in.
*/
int Curl_parsenetrc(const char *host,
char **loginp,
char **passwordp,
char *netrcfile)
{
FILE *file;
int retcode=1;
int specific_login = (*loginp && **loginp != 0);
bool netrc_alloc = FALSE;
enum host_lookup_state state=NOTHING;
char state_login=0; /* Found a login keyword */
char state_password=0; /* Found a password keyword */
int state_our_login=FALSE; /* With specific_login, found *our* login name */
#define NETRC DOT_CHAR "netrc"
if(!netrcfile) {
bool home_alloc = FALSE;
char *home = curl_getenv("HOME"); /* portable environment reader */
if(home) {
home_alloc = TRUE;
#if defined(HAVE_GETPWUID_R) && defined(HAVE_GETEUID)
}
else {
struct passwd pw, *pw_res;
char pwbuf[1024];
if(!getpwuid_r(geteuid(), &pw, pwbuf, sizeof(pwbuf), &pw_res)
&& pw_res) {
home = strdup(pw.pw_dir);
if(!home)
return CURLE_OUT_OF_MEMORY;
home_alloc = TRUE;
}
#elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
}
else {
struct passwd *pw;
pw= getpwuid(geteuid());
if(pw) {
home = pw->pw_dir;
}
#endif
}
if(!home)
return retcode; /* no home directory found (or possibly out of memory) */
netrcfile = curl_maprintf("%s%s%s", home, DIR_CHAR, NETRC);
if(home_alloc)
free(home);
if(!netrcfile) {
return -1;
}
netrc_alloc = TRUE;
}
file = fopen(netrcfile, FOPEN_READTEXT);
if(netrc_alloc)
free(netrcfile);
if(file) {
char *tok;
char *tok_buf;
bool done=FALSE;
char netrcbuffer[256];
int netrcbuffsize = (int)sizeof(netrcbuffer);
while(!done && fgets(netrcbuffer, netrcbuffsize, file)) {
tok=strtok_r(netrcbuffer, " \t\n", &tok_buf);
while(!done && tok) {
if((*loginp && **loginp) && (*passwordp && **passwordp)) {
done=TRUE;
break;
}
switch(state) {
case NOTHING:
if(Curl_raw_equal("machine", tok)) {
/* the next tok is the machine name, this is in itself the
delimiter that starts the stuff entered for this machine,
after this we need to search for 'login' and
'password'. */
state=HOSTFOUND;
}
else if(Curl_raw_equal("default", tok)) {
state=HOSTVALID;
retcode=0; /* we did find our host */
}
break;
case HOSTFOUND:
if(Curl_raw_equal(host, tok)) {
/* and yes, this is our host! */
state=HOSTVALID;
retcode=0; /* we did find our host */
}
else
/* not our host */
state=NOTHING;
break;
case HOSTVALID:
/* we are now parsing sub-keywords concerning "our" host */
if(state_login) {
if(specific_login) {
state_our_login = Curl_raw_equal(*loginp, tok);
}
else {
free(*loginp);
*loginp = strdup(tok);
if(!*loginp) {
retcode = -1; /* allocation failed */
goto out;
}
}
state_login=0;
}
else if(state_password) {
if(state_our_login || !specific_login) {
free(*passwordp);
*passwordp = strdup(tok);
if(!*passwordp) {
retcode = -1; /* allocation failed */
goto out;
}
}
state_password=0;
}
else if(Curl_raw_equal("login", tok))
state_login=1;
else if(Curl_raw_equal("password", tok))
state_password=1;
else if(Curl_raw_equal("machine", tok)) {
/* ok, there's machine here go => */
state = HOSTFOUND;
state_our_login = FALSE;
}
break;
} /* switch (state) */
tok = strtok_r(NULL, " \t\n", &tok_buf);
} /* while(tok) */
} /* while fgets() */
out:
fclose(file);
}
return retcode;
}