[337] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #ifdef HAVE_PWD_H
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| 26 | #include <pwd.h>
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| 27 | #endif
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| 28 |
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| 29 | #include <curl/curl.h>
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| 30 | #include "netrc.h"
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| 31 | #include "strtok.h"
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| 32 | #include "strcase.h"
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| 33 |
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| 34 | /* The last 3 #include files should be in this order */
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| 35 | #include "curl_printf.h"
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| 36 | #include "curl_memory.h"
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| 37 | #include "memdebug.h"
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| 38 |
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| 39 | /* Get user and password from .netrc when given a machine name */
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| 40 |
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| 41 | enum host_lookup_state {
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| 42 | NOTHING,
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| 43 | HOSTFOUND, /* the 'machine' keyword was found */
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| 44 | HOSTVALID /* this is "our" machine! */
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| 45 | };
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| 46 |
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| 47 | /*
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| 48 | * @unittest: 1304
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| 49 | *
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| 50 | * *loginp and *passwordp MUST be allocated if they aren't NULL when passed
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| 51 | * in.
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| 52 | */
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| 53 | int Curl_parsenetrc(const char *host,
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| 54 | char **loginp,
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| 55 | char **passwordp,
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| 56 | char *netrcfile)
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| 57 | {
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| 58 | FILE *file;
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| 59 | int retcode = 1;
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| 60 | int specific_login = (*loginp && **loginp != 0);
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| 61 | bool netrc_alloc = FALSE;
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| 62 | enum host_lookup_state state = NOTHING;
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| 63 |
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| 64 | char state_login = 0; /* Found a login keyword */
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| 65 | char state_password = 0; /* Found a password keyword */
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| 66 | int state_our_login = FALSE; /* With specific_login, found *our* login
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| 67 | name */
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| 68 |
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| 69 | #define NETRC DOT_CHAR "netrc"
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| 70 |
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| 71 | if(!netrcfile) {
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| 72 | bool home_alloc = FALSE;
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| 73 | char *home = curl_getenv("HOME"); /* portable environment reader */
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| 74 | if(home) {
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| 75 | home_alloc = TRUE;
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| 76 | #if defined(HAVE_GETPWUID_R) && defined(HAVE_GETEUID)
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| 77 | }
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| 78 | else {
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| 79 | struct passwd pw, *pw_res;
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| 80 | char pwbuf[1024];
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| 81 | if(!getpwuid_r(geteuid(), &pw, pwbuf, sizeof(pwbuf), &pw_res)
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| 82 | && pw_res) {
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| 83 | home = strdup(pw.pw_dir);
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| 84 | if(!home)
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| 85 | return CURLE_OUT_OF_MEMORY;
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| 86 | home_alloc = TRUE;
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| 87 | }
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| 88 | #elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
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| 89 | }
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| 90 | else {
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| 91 | struct passwd *pw;
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| 92 | pw = getpwuid(geteuid());
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| 93 | if(pw) {
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| 94 | home = pw->pw_dir;
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| 95 | }
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| 96 | #endif
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| 97 | }
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| 98 |
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| 99 | if(!home)
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| 100 | return retcode; /* no home directory found (or possibly out of memory) */
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| 101 |
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| 102 | netrcfile = curl_maprintf("%s%s%s", home, DIR_CHAR, NETRC);
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| 103 | if(home_alloc)
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| 104 | free(home);
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| 105 | if(!netrcfile) {
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| 106 | return -1;
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| 107 | }
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| 108 | netrc_alloc = TRUE;
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| 109 | }
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| 110 |
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| 111 | file = fopen(netrcfile, FOPEN_READTEXT);
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| 112 | if(netrc_alloc)
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| 113 | free(netrcfile);
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| 114 | if(file) {
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| 115 | char *tok;
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| 116 | char *tok_buf;
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| 117 | bool done = FALSE;
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| 118 | char netrcbuffer[256];
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| 119 | int netrcbuffsize = (int)sizeof(netrcbuffer);
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| 120 |
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| 121 | while(!done && fgets(netrcbuffer, netrcbuffsize, file)) {
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| 122 | tok = strtok_r(netrcbuffer, " \t\n", &tok_buf);
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| 123 | if(tok && *tok == '#')
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| 124 | /* treat an initial hash as a comment line */
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| 125 | continue;
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| 126 | while(!done && tok) {
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| 127 |
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| 128 | if((*loginp && **loginp) && (*passwordp && **passwordp)) {
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| 129 | done = TRUE;
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| 130 | break;
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| 131 | }
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| 132 |
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| 133 | switch(state) {
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| 134 | case NOTHING:
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| 135 | if(strcasecompare("machine", tok)) {
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| 136 | /* the next tok is the machine name, this is in itself the
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| 137 | delimiter that starts the stuff entered for this machine,
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| 138 | after this we need to search for 'login' and
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| 139 | 'password'. */
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| 140 | state = HOSTFOUND;
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| 141 | }
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| 142 | else if(strcasecompare("default", tok)) {
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| 143 | state = HOSTVALID;
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| 144 | retcode = 0; /* we did find our host */
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| 145 | }
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| 146 | break;
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| 147 | case HOSTFOUND:
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| 148 | if(strcasecompare(host, tok)) {
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| 149 | /* and yes, this is our host! */
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| 150 | state = HOSTVALID;
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| 151 | retcode = 0; /* we did find our host */
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| 152 | }
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| 153 | else
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| 154 | /* not our host */
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| 155 | state = NOTHING;
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| 156 | break;
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| 157 | case HOSTVALID:
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| 158 | /* we are now parsing sub-keywords concerning "our" host */
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| 159 | if(state_login) {
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| 160 | if(specific_login) {
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| 161 | state_our_login = strcasecompare(*loginp, tok);
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| 162 | }
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| 163 | else {
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| 164 | free(*loginp);
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| 165 | *loginp = strdup(tok);
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| 166 | if(!*loginp) {
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| 167 | retcode = -1; /* allocation failed */
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| 168 | goto out;
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| 169 | }
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| 170 | }
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| 171 | state_login = 0;
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| 172 | }
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| 173 | else if(state_password) {
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| 174 | if(state_our_login || !specific_login) {
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| 175 | free(*passwordp);
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| 176 | *passwordp = strdup(tok);
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| 177 | if(!*passwordp) {
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| 178 | retcode = -1; /* allocation failed */
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| 179 | goto out;
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| 180 | }
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| 181 | }
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| 182 | state_password = 0;
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| 183 | }
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| 184 | else if(strcasecompare("login", tok))
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| 185 | state_login = 1;
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| 186 | else if(strcasecompare("password", tok))
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| 187 | state_password = 1;
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| 188 | else if(strcasecompare("machine", tok)) {
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| 189 | /* ok, there's machine here go => */
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| 190 | state = HOSTFOUND;
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| 191 | state_our_login = FALSE;
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| 192 | }
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| 193 | break;
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| 194 | } /* switch (state) */
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| 195 |
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| 196 | tok = strtok_r(NULL, " \t\n", &tok_buf);
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| 197 | } /* while(tok) */
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| 198 | } /* while fgets() */
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| 199 |
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| 200 | out:
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| 201 | fclose(file);
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| 202 | }
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| 203 |
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| 204 | return retcode;
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| 205 | }
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