/src/PROJ/curl/lib/netrc.c

Source (jump to first uncovered line)
/***************************************************************************
 *                                  _   _ ____  _
 *  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"
#ifndef CURL_DISABLE_NETRC

#ifdef HAVE_PWD_H
#include <pwd.h>
#endif

#include <curl/curl.h>
#include "netrc.h"
#include "strtok.h"
#include "strcase.h"
#include "curl_get_line.h"

/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#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! */
  MACDEF
};

#define NETRC_FILE_MISSING 1
#define NETRC_FAILED -1
#define NETRC_SUCCESS 0

#define MAX_NETRC_LINE 4096

/*
 * Returns zero on success.
 */
static int parsenetrc(const char *host,
                      char **loginp,
                      char **passwordp,
                      char *netrcfile)
{
  FILE *file;
  int retcode = NETRC_FILE_MISSING;
  char *login = *loginp;
  char *password = *passwordp;
  bool specific_login = (login && *login != 0);
  bool login_alloc = FALSE;
  bool password_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 = TRUE;  /* With specific_login, found *our* login
                                  name (or login-less line) */

  DEBUGASSERT(netrcfile);

  file = fopen(netrcfile, FOPEN_READTEXT);
  if(file) {
    bool done = FALSE;
    struct dynbuf buf;
    Curl_dyn_init(&buf, MAX_NETRC_LINE);

    while(!done && Curl_get_line(&buf, file)) {
      char *tok;
      char *tok_end;
      bool quoted;
      char *netrcbuffer = Curl_dyn_ptr(&buf);
      if(state == MACDEF) {
        if((netrcbuffer[0] == '\n') || (netrcbuffer[0] == '\r'))
          state = NOTHING;
        else
          continue;
      }
      tok = netrcbuffer;
      while(tok) {
        while(ISBLANK(*tok))
          tok++;
        /* tok is first non-space letter */
        if(!*tok || (*tok == '#'))
          /* end of line or the rest is a comment */
          break;

        /* leading double-quote means quoted string */
        quoted = (*tok == '\"');

        tok_end = tok;
        if(!quoted) {
          while(!ISSPACE(*tok_end))
            tok_end++;
          *tok_end = 0;
        }
        else {
          bool escape = FALSE;
          bool endquote = FALSE;
          char *store = tok;
          tok_end++; /* pass the leading quote */
          while(*tok_end) {
            char s = *tok_end;
            if(escape) {
              escape = FALSE;
              switch(s) {
              case 'n':
                s = '\n';
                break;
              case 'r':
                s = '\r';
                break;
              case 't':
                s = '\t';
                break;
              }
            }
            else if(s == '\\') {
              escape = TRUE;
              tok_end++;
              continue;
            }
            else if(s == '\"') {
              tok_end++; /* pass the ending quote */
              endquote = TRUE;
              break;
            }
            *store++ = s;
            tok_end++;
          }
          *store = 0;
          if(escape || !endquote) {
            /* bad syntax, get out */
            retcode = NETRC_FAILED;
            goto out;
          }
        }

        if((login && *login) && (password && *password)) {
          done = TRUE;
          break;
        }

        switch(state) {
        case NOTHING:
          if(strcasecompare("macdef", tok)) {
            /* Define a macro. A macro is defined with the specified name; its
               contents begin with the next .netrc line and continue until a
               null line (consecutive new-line characters) is encountered. */
            state = MACDEF;
          }
          else if(strcasecompare("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(strcasecompare("default", tok)) {
            state = HOSTVALID;
            retcode = NETRC_SUCCESS; /* we did find our host */
          }
          break;
        case MACDEF:
          if(!strlen(tok)) {
            state = NOTHING;
          }
          break;
        case HOSTFOUND:
          if(strcasecompare(host, tok)) {
            /* and yes, this is our host! */
            state = HOSTVALID;
            retcode = NETRC_SUCCESS; /* 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_timestrcmp(login, tok);
            }
            else if(!login || Curl_timestrcmp(login, tok)) {
              if(login_alloc) {
                free(login);
                login_alloc = FALSE;
              }
              login = strdup(tok);
              if(!login) {
                retcode = NETRC_FAILED; /* allocation failed */
                goto out;
              }
              login_alloc = TRUE;
            }
            state_login = 0;
          }
          else if(state_password) {
            if((state_our_login || !specific_login)
               && (!password || Curl_timestrcmp(password, tok))) {
              if(password_alloc) {
                free(password);
                password_alloc = FALSE;
              }
              password = strdup(tok);
              if(!password) {
                retcode = NETRC_FAILED; /* allocation failed */
                goto out;
              }
              password_alloc = TRUE;
            }
            state_password = 0;
          }
          else if(strcasecompare("login", tok))
            state_login = 1;
          else if(strcasecompare("password", tok))
            state_password = 1;
          else if(strcasecompare("machine", tok)) {
            /* ok, there's machine here go => */
            state = HOSTFOUND;
            state_our_login = FALSE;
          }
          break;
        } /* switch (state) */
        tok = ++tok_end;
      }
    } /* while Curl_get_line() */

out:
    Curl_dyn_free(&buf);
    if(!retcode) {
      /* success */
      if(login_alloc) {
        if(*loginp)
          free(*loginp);
        *loginp = login;
      }
      if(password_alloc) {
        if(*passwordp)
          free(*passwordp);
        *passwordp = password;
      }
    }
    else {
      if(login_alloc)
        free(login);
      if(password_alloc)
        free(password);
    }
    fclose(file);
  }

  return retcode;
}

/*
 * @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)
{
  int retcode = 1;
  char *filealloc = NULL;

  if(!netrcfile) {
#if defined(HAVE_GETPWUID_R) && defined(HAVE_GETEUID)
    char pwbuf[1024];
#endif
    char *home = NULL;
    char *homea = curl_getenv("HOME"); /* portable environment reader */
    if(homea) {
      home = homea;
#if defined(HAVE_GETPWUID_R) && defined(HAVE_GETEUID)
    }
    else {
      struct passwd pw, *pw_res;
      if(!getpwuid_r(geteuid(), &pw, pwbuf, sizeof(pwbuf), &pw_res)
         && pw_res) {
        home = pw.pw_dir;
      }
#elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
    }
    else {
      struct passwd *pw;
      pw = getpwuid(geteuid());
      if(pw) {
        home = pw->pw_dir;
      }
#elif defined(_WIN32)
    }
    else {
      homea = curl_getenv("USERPROFILE");
      if(homea) {
        home = homea;
      }
#endif
    }

    if(!home)
      return retcode; /* no home directory found (or possibly out of
                         memory) */

    filealloc = curl_maprintf("%s%s.netrc", home, DIR_CHAR);
    if(!filealloc) {
      free(homea);
      return -1;
    }
    retcode = parsenetrc(host, loginp, passwordp, filealloc);
    free(filealloc);
#ifdef _WIN32
    if(retcode == NETRC_FILE_MISSING) {
      /* fallback to the old-style "_netrc" file */
      filealloc = curl_maprintf("%s%s_netrc", home, DIR_CHAR);
      if(!filealloc) {
        free(homea);
        return -1;
      }
      retcode = parsenetrc(host, loginp, passwordp, filealloc);
      free(filealloc);
    }
#endif
    free(homea);
  }
  else
    retcode = parsenetrc(host, loginp, passwordp, netrcfile);
  return retcode;
}

#endif

Coverage Report

Created: 2024-02-25 06:14

Line	Count	Source (jump to first uncovered line)
1		/***************************************************************************
2		* _ _ ____ _
3		* Project ___\| \| \| \| _ \\| \|
4		* / __\| \| \| \| \|_) \| \|
5		* \| (__\| \|_\| \| _ <\| \|___
6		* \___\|\___/\|_\| \_\_____\|
7		*
8		* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9		*
10		* This software is licensed as described in the file COPYING, which
11		* you should have received as part of this distribution. The terms
12		* are also available at https://curl.se/docs/copyright.html.
13		*
14		* You may opt to use, copy, modify, merge, publish, distribute and/or sell
15		* copies of the Software, and permit persons to whom the Software is
16		* furnished to do so, under the terms of the COPYING file.
17		*
18		* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19		* KIND, either express or implied.
20		*
21		* SPDX-License-Identifier: curl
22		*
23		***************************************************************************/
24
25		#include "curl_setup.h"
26		#ifndef CURL_DISABLE_NETRC
27
28		#ifdef HAVE_PWD_H
29		#include <pwd.h>
30		#endif
31
32		#include <curl/curl.h>
33		#include "netrc.h"
34		#include "strtok.h"
35		#include "strcase.h"
36		#include "curl_get_line.h"
37
38		/* The last 3 #include files should be in this order */
39		#include "curl_printf.h"
40		#include "curl_memory.h"
41		#include "memdebug.h"
42
43		/* Get user and password from .netrc when given a machine name */
44
45		enum host_lookup_state {
46		NOTHING,
47		HOSTFOUND, /* the 'machine' keyword was found */
48		HOSTVALID, /* this is "our" machine! */
49		MACDEF
50		};
51
52	0	#define NETRC_FILE_MISSING 1
53	0	#define NETRC_FAILED -1
54	0	#define NETRC_SUCCESS 0
55
56	0	#define MAX_NETRC_LINE 4096
57
58		/*
59		* Returns zero on success.
60		*/
61		static int parsenetrc(const char *host,
62		char **loginp,
63		char **passwordp,
64		char *netrcfile)
65	0	{
66	0	FILE *file;
67	0	int retcode = NETRC_FILE_MISSING;
68	0	char login = loginp;
69	0	char password = passwordp;
70	0	bool specific_login = (login && *login != 0);
71	0	bool login_alloc = FALSE;
72	0	bool password_alloc = FALSE;
73	0	enum host_lookup_state state = NOTHING;
74
75	0	char state_login = 0; /* Found a login keyword */
76	0	char state_password = 0; /* Found a password keyword */
77	0	int state_our_login = TRUE; /* With specific_login, found our login
78		name (or login-less line) */
79
80	0	DEBUGASSERT(netrcfile);
81
82	0	file = fopen(netrcfile, FOPEN_READTEXT);
83	0	if(file) {
84	0	bool done = FALSE;
85	0	struct dynbuf buf;
86	0	Curl_dyn_init(&buf, MAX_NETRC_LINE);
87
88	0	while(!done && Curl_get_line(&buf, file)) {
89	0	char *tok;
90	0	char *tok_end;
91	0	bool quoted;
92	0	char *netrcbuffer = Curl_dyn_ptr(&buf);
93	0	if(state == MACDEF) {
94	0	if((netrcbuffer[0] == '\n') \|\| (netrcbuffer[0] == '\r'))
95	0	state = NOTHING;
96	0	else
97	0	continue;
98	0	}
99	0	tok = netrcbuffer;
100	0	while(tok) {
101	0	while(ISBLANK(*tok))
102	0	tok++;
103		/* tok is first non-space letter */
104	0	if(!tok \|\| (tok == '#'))
105		/* end of line or the rest is a comment */
106	0	break;
107
108		/* leading double-quote means quoted string */
109	0	quoted = (*tok == '\"');
110
111	0	tok_end = tok;
112	0	if(!quoted) {
113	0	while(!ISSPACE(*tok_end))
114	0	tok_end++;
115	0	*tok_end = 0;
116	0	}
117	0	else {
118	0	bool escape = FALSE;
119	0	bool endquote = FALSE;
120	0	char *store = tok;
121	0	tok_end++; /* pass the leading quote */
122	0	while(*tok_end) {
123	0	char s = *tok_end;
124	0	if(escape) {
125	0	escape = FALSE;
126	0	switch(s) {
127	0	case 'n':
128	0	s = '\n';
129	0	break;
130	0	case 'r':
131	0	s = '\r';
132	0	break;
133	0	case 't':
134	0	s = '\t';
135	0	break;
136	0	}
137	0	}
138	0	else if(s == '\\') {
139	0	escape = TRUE;
140	0	tok_end++;
141	0	continue;
142	0	}
143	0	else if(s == '\"') {
144	0	tok_end++; /* pass the ending quote */
145	0	endquote = TRUE;
146	0	break;
147	0	}
148	0	*store++ = s;
149	0	tok_end++;
150	0	}
151	0	*store = 0;
152	0	if(escape \|\| !endquote) {
153		/* bad syntax, get out */
154	0	retcode = NETRC_FAILED;
155	0	goto out;
156	0	}
157	0	}
158
159	0	if((login && login) && (password && password)) {
160	0	done = TRUE;
161	0	break;
162	0	}
163
164	0	switch(state) {
165	0	case NOTHING:
166	0	if(strcasecompare("macdef", tok)) {
167		/* Define a macro. A macro is defined with the specified name; its
168		contents begin with the next .netrc line and continue until a
169		null line (consecutive new-line characters) is encountered. */
170	0	state = MACDEF;
171	0	}
172	0	else if(strcasecompare("machine", tok)) {
173		/* the next tok is the machine name, this is in itself the
174		delimiter that starts the stuff entered for this machine,
175		after this we need to search for 'login' and
176		'password'. */
177	0	state = HOSTFOUND;
178	0	}
179	0	else if(strcasecompare("default", tok)) {
180	0	state = HOSTVALID;
181	0	retcode = NETRC_SUCCESS; /* we did find our host */
182	0	}
183	0	break;
184	0	case MACDEF:
185	0	if(!strlen(tok)) {
186	0	state = NOTHING;
187	0	}
188	0	break;
189	0	case HOSTFOUND:
190	0	if(strcasecompare(host, tok)) {
191		/* and yes, this is our host! */
192	0	state = HOSTVALID;
193	0	retcode = NETRC_SUCCESS; /* we did find our host */
194	0	}
195	0	else
196		/* not our host */
197	0	state = NOTHING;
198	0	break;
199	0	case HOSTVALID:
200		/* we are now parsing sub-keywords concerning "our" host */
201	0	if(state_login) {
202	0	if(specific_login) {
203	0	state_our_login = !Curl_timestrcmp(login, tok);
204	0	}
205	0	else if(!login \|\| Curl_timestrcmp(login, tok)) {
206	0	if(login_alloc) {
207	0	free(login);
208	0	login_alloc = FALSE;
209	0	}
210	0	login = strdup(tok);
211	0	if(!login) {
212	0	retcode = NETRC_FAILED; /* allocation failed */
213	0	goto out;
214	0	}
215	0	login_alloc = TRUE;
216	0	}
217	0	state_login = 0;
218	0	}
219	0	else if(state_password) {
220	0	if((state_our_login \|\| !specific_login)
221	0	&& (!password \|\| Curl_timestrcmp(password, tok))) {
222	0	if(password_alloc) {
223	0	free(password);
224	0	password_alloc = FALSE;
225	0	}
226	0	password = strdup(tok);
227	0	if(!password) {
228	0	retcode = NETRC_FAILED; /* allocation failed */
229	0	goto out;
230	0	}
231	0	password_alloc = TRUE;
232	0	}
233	0	state_password = 0;
234	0	}
235	0	else if(strcasecompare("login", tok))
236	0	state_login = 1;
237	0	else if(strcasecompare("password", tok))
238	0	state_password = 1;
239	0	else if(strcasecompare("machine", tok)) {
240		/* ok, there's machine here go => */
241	0	state = HOSTFOUND;
242	0	state_our_login = FALSE;
243	0	}
244	0	break;
245	0	} /* switch (state) */
246	0	tok = ++tok_end;
247	0	}
248	0	} /* while Curl_get_line() */
249
250	0	out:
251	0	Curl_dyn_free(&buf);
252	0	if(!retcode) {
253		/* success */
254	0	if(login_alloc) {
255	0	if(*loginp)
256	0	free(*loginp);
257	0	*loginp = login;
258	0	}
259	0	if(password_alloc) {
260	0	if(*passwordp)
261	0	free(*passwordp);
262	0	*passwordp = password;
263	0	}
264	0	}
265	0	else {
266	0	if(login_alloc)
267	0	free(login);
268	0	if(password_alloc)
269	0	free(password);
270	0	}
271	0	fclose(file);
272	0	}
273
274	0	return retcode;
275	0	}
276
277		/*
278		* @unittest: 1304
279		*
280		* loginp and passwordp MUST be allocated if they aren't NULL when passed
281		* in.
282		*/
283		int Curl_parsenetrc(const char host, char loginp, char *passwordp,
284		char *netrcfile)
285	0	{
286	0	int retcode = 1;
287	0	char *filealloc = NULL;
288
289	0	if(!netrcfile) {
290	0	#if defined(HAVE_GETPWUID_R) && defined(HAVE_GETEUID)
291	0	char pwbuf[1024];
292	0	#endif
293	0	char *home = NULL;
294	0	char homea = curl_getenv("HOME"); / portable environment reader */
295	0	if(homea) {
296	0	home = homea;
297	0	#if defined(HAVE_GETPWUID_R) && defined(HAVE_GETEUID)
298	0	}
299	0	else {
300	0	struct passwd pw, *pw_res;
301	0	if(!getpwuid_r(geteuid(), &pw, pwbuf, sizeof(pwbuf), &pw_res)
302	0	&& pw_res) {
303	0	home = pw.pw_dir;
304	0	}
305		#elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
306		}
307		else {
308		struct passwd *pw;
309		pw = getpwuid(geteuid());
310		if(pw) {
311		home = pw->pw_dir;
312		}
313		#elif defined(_WIN32)
314		}
315		else {
316		homea = curl_getenv("USERPROFILE");
317		if(homea) {
318		home = homea;
319		}
320		#endif
321	0	}
322
323	0	if(!home)
324	0	return retcode; /* no home directory found (or possibly out of
325		memory) */
326
327	0	filealloc = curl_maprintf("%s%s.netrc", home, DIR_CHAR);
328	0	if(!filealloc) {
329	0	free(homea);
330	0	return -1;
331	0	}
332	0	retcode = parsenetrc(host, loginp, passwordp, filealloc);
333	0	free(filealloc);
334		#ifdef _WIN32
335		if(retcode == NETRC_FILE_MISSING) {
336		/* fallback to the old-style "_netrc" file */
337		filealloc = curl_maprintf("%s%s_netrc", home, DIR_CHAR);
338		if(!filealloc) {
339		free(homea);
340		return -1;
341		}
342		retcode = parsenetrc(host, loginp, passwordp, filealloc);
343		free(filealloc);
344		}
345		#endif
346	0	free(homea);
347	0	}
348	0	else
349	0	retcode = parsenetrc(host, loginp, passwordp, netrcfile);
350	0	return retcode;
351	0	}
352
353		#endif