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+// -*- mode: cpp; mode: fold -*-
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+// Description /*{{{*/
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+// $Id: netrc.c,v 1.38 2007-11-07 09:21:35 bagder Exp $
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+/* ######################################################################
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+
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+ netrc file parser - returns the login and password of a give host in
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+ a specified netrc-type file
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+
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+ Originally written by Daniel Stenberg, <daniel@haxx.se>, et al. and
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+ placed into the Public Domain, do with it what you will.
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+
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+ ##################################################################### */
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+ /*}}}*/
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+
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+#include <apt-pkg/configuration.h>
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+#include <apt-pkg/fileutl.h>
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+#include <iostream>
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <unistd.h>
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+#include <pwd.h>
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+
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+#include "netrc.h"
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+
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+
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+/* Get user and password from .netrc when given a machine name */
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+
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+enum {
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+ NOTHING,
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+ HOSTFOUND, /* the 'machine' keyword was found */
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+ HOSTCOMPLETE, /* the machine name following the keyword was found too */
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+ HOSTVALID, /* this is "our" machine! */
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+ HOSTEND /* LAST enum */
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+};
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+
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+/* make sure we have room for at least this size: */
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+#define LOGINSIZE 64
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+#define PASSWORDSIZE 64
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+#define NETRC DOT_CHAR "netrc"
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+
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+/* returns -1 on failure, 0 if the host is found, 1 is the host isn't found */
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+int parsenetrc (char *host, char *login, char *password, char *netrcfile = NULL)
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+{
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+ FILE *file;
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+ int retcode = 1;
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+ int specific_login = (login[0] != 0);
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+ char *home = NULL;
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+ bool netrc_alloc = false;
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+ int state = NOTHING;
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+
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+ char state_login = 0; /* Found a login keyword */
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+ char state_password = 0; /* Found a password keyword */
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+ int state_our_login = false; /* With specific_login,
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+ found *our* login name */
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+
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+ if (!netrcfile) {
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+ home = getenv ("HOME"); /* portable environment reader */
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+
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+ if (!home) {
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+ struct passwd *pw;
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+ pw = getpwuid (geteuid ());
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+ if(pw)
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+ home = pw->pw_dir;
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+ }
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+
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+ if (!home)
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+ return -1;
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+
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+ asprintf (&netrcfile, "%s%s%s", home, DIR_CHAR, NETRC);
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+ if(!netrcfile)
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+ return -1;
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+ else
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+ netrc_alloc = true;
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+ }
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+
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+ file = fopen (netrcfile, "r");
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+ if(file) {
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+ char *tok;
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+ char *tok_buf;
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+ bool done = false;
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+ char netrcbuffer[256];
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+
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+ while (!done && fgets(netrcbuffer, sizeof (netrcbuffer), file)) {
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+ tok = strtok_r (netrcbuffer, " \t\n", &tok_buf);
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+ while (!done && tok) {
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+ if(login[0] && password[0]) {
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+ done = true;
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+ break;
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+ }
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+
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+ switch(state) {
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+ case NOTHING:
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+ if (!strcasecmp ("machine", tok)) {
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+ /* the next tok is the machine name, this is in itself the
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+ delimiter that starts the stuff entered for this machine,
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+ after this we need to search for 'login' and
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+ 'password'. */
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+ state = HOSTFOUND;
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+ }
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+ break;
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+ case HOSTFOUND:
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+ /* extended definition of a "machine" if we have a "/"
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+ we match the start of the string (host.startswith(token) */
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+ if ((strchr(host, '/') && strstr(host, tok) == host) ||
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+ (!strcasecmp (host, tok))) {
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+ /* and yes, this is our host! */
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+ state = HOSTVALID;
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+ retcode = 0; /* we did find our host */
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+ }
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+ else
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+ /* not our host */
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+ state = NOTHING;
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+ break;
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+ case HOSTVALID:
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+ /* we are now parsing sub-keywords concerning "our" host */
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+ if (state_login) {
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+ if (specific_login)
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+ state_our_login = !strcasecmp (login, tok);
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+ else
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+ strncpy (login, tok, LOGINSIZE - 1);
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+ state_login = 0;
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+ } else if (state_password) {
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+ if (state_our_login || !specific_login)
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+ strncpy (password, tok, PASSWORDSIZE - 1);
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+ state_password = 0;
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+ } else if (!strcasecmp ("login", tok))
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+ state_login = 1;
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+ else if (!strcasecmp ("password", tok))
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+ state_password = 1;
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+ else if(!strcasecmp ("machine", tok)) {
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+ /* ok, there's machine here go => */
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+ state = HOSTFOUND;
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+ state_our_login = false;
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+ }
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+ break;
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+ } /* switch (state) */
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+
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+ tok = strtok_r (NULL, " \t\n", &tok_buf);
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+ } /* while(tok) */
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+ } /* while fgets() */
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+
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+ fclose(file);
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+ }
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+
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+ if (netrc_alloc)
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+ free(netrcfile);
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+
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+ return retcode;
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+}
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+
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+void maybe_add_auth (URI &Uri, string NetRCFile)
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+{
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+ if (_config->FindB("Debug::Acquire::netrc", false) == true)
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+ std::clog << "maybe_add_auth: " << (string)Uri
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+ << " " << NetRCFile << std::endl;
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+ if (Uri.Password.empty () == true || Uri.User.empty () == true)
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+ {
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+ if (NetRCFile.empty () == false)
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+ {
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+ char login[64] = "";
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+ char password[64] = "";
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+ char *netrcfile = strdupa (NetRCFile.c_str ());
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+
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+ // first check for a generic host based netrc entry
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+ char *host = strdupa (Uri.Host.c_str ());
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+ if (host && parsenetrc (host, login, password, netrcfile) == 0)
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+ {
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+ if (_config->FindB("Debug::Acquire::netrc", false) == true)
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+ std::clog << "host: " << host
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+ << " user: " << login
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+ << " pass-size: " << strlen(password)
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+ << std::endl;
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+ Uri.User = string (login);
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+ Uri.Password = string (password);
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+ return;
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+ }
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+
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+ // if host did not work, try Host+Path next, this will trigger
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+ // a lookup uri.startswith(host) in the netrc file parser (because
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+ // of the "/"
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+ char *hostpath = strdupa (string(Uri.Host+Uri.Path).c_str ());
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+ if (hostpath && parsenetrc (hostpath, login, password, netrcfile) == 0)
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+ {
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+ if (_config->FindB("Debug::Acquire::netrc", false) == true)
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+ std::clog << "hostpath: " << hostpath
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+ << " user: " << login
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+ << " pass-size: " << strlen(password)
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+ << std::endl;
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+ Uri.User = string (login);
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+ Uri.Password = string (password);
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+ return;
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+ }
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+ }
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+ }
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+}
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+
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+#ifdef DEBUG
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+int main(int argc, char* argv[])
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+{
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+ char login[64] = "";
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+ char password[64] = "";
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+
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+ if(argc < 2)
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+ return -1;
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+
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+ if(0 == parsenetrc (argv[1], login, password, argv[2])) {
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+ printf("HOST: %s LOGIN: %s PASSWORD: %s\n", argv[1], login, password);
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+ }
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+}
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+#endif
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Michael Vogt