Import Upstream version 1.1~pre12
This commit is contained in:
Guus Sliepen
parent
1813f3157e
commit
aa10d88732
134 changed files with 8673 additions and 4989 deletions
255
src/invitation.c
255
src/invitation.c
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@ -1,6 +1,6 @@
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/*
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invitation.c -- Create and accept invitations
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Copyright (C) 2013-2014 Guus Sliepen <guus@tinc-vpn.org>
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Copyright (C) 2013-2015 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -23,16 +23,20 @@
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#include "crypto.h"
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#include "ecdsa.h"
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#include "ecdsagen.h"
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#include "ifconfig.h"
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#include "invitation.h"
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#include "names.h"
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#include "netutl.h"
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#include "rsagen.h"
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#include "script.h"
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#include "sptps.h"
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#include "subnet.h"
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#include "tincctl.h"
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#include "utils.h"
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#include "xalloc.h"
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#include "ed25519/sha512.h"
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int addressfamily = AF_UNSPEC;
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static void scan_for_hostname(const char *filename, char **hostname, char **port) {
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@ -82,11 +86,11 @@ char *get_my_hostname() {
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char *port = NULL;
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char *hostport = NULL;
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char *name = get_my_name(false);
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char *filename = NULL;
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char filename[PATH_MAX] = {0};
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// Use first Address statement in own host config file
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if(check_id(name)) {
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xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
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snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
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scan_for_hostname(filename, &hostname, &port);
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scan_for_hostname(tinc_conf, &hostname, &port);
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}
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@ -180,7 +184,7 @@ again:
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hostname = xstrdup(line);
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save:
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if(filename) {
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if(*filename) {
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FILE *f = fopen(filename, "a");
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if(f) {
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fprintf(f, "\nAddress = %s\n", hostname);
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@ -205,7 +209,6 @@ done:
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free(hostname);
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free(port);
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free(filename);
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return hostport;
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}
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@ -241,14 +244,12 @@ int cmd_invite(int argc, char *argv[]) {
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return 1;
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// Ensure no host configuration file with that name exists
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char *filename = NULL;
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xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, argv[1]);
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char filename[PATH_MAX];
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snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", confbase, argv[1]);
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if(!access(filename, F_OK)) {
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free(filename);
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fprintf(stderr, "A host config file for %s already exists!\n", argv[1]);
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return 1;
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}
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free(filename);
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// If a daemon is running, ensure no other nodes know about this name
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bool found = false;
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@ -270,12 +271,9 @@ int cmd_invite(int argc, char *argv[]) {
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}
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}
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char hash[25];
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xasprintf(&filename, "%s" SLASH "invitations", confbase);
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snprintf(filename, sizeof filename, "%s" SLASH "invitations", confbase);
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if(mkdir(filename, 0700) && errno != EEXIST) {
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fprintf(stderr, "Could not create directory %s: %s\n", filename, strerror(errno));
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free(filename);
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return 1;
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}
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@ -283,7 +281,6 @@ int cmd_invite(int argc, char *argv[]) {
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DIR *dir = opendir(filename);
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if(!dir) {
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fprintf(stderr, "Could not read directory %s: %s\n", filename, strerror(errno));
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free(filename);
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return 1;
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}
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@ -295,9 +292,9 @@ int cmd_invite(int argc, char *argv[]) {
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while((ent = readdir(dir))) {
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if(strlen(ent->d_name) != 24)
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continue;
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char *invname;
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char invname[PATH_MAX];
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struct stat st;
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xasprintf(&invname, "%s" SLASH "%s", filename, ent->d_name);
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snprintf(invname, sizeof invname, "%s" SLASH "%s", filename, ent->d_name);
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if(!stat(invname, &st)) {
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if(deadline < st.st_mtime)
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count++;
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@ -307,21 +304,17 @@ int cmd_invite(int argc, char *argv[]) {
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fprintf(stderr, "Could not stat %s: %s\n", invname, strerror(errno));
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errno = 0;
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}
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free(invname);
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}
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closedir(dir);
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if(errno) {
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fprintf(stderr, "Error while reading directory %s: %s\n", filename, strerror(errno));
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closedir(dir);
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free(filename);
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return 1;
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}
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closedir(dir);
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free(filename);
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ecdsa_t *key;
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xasprintf(&filename, "%s" SLASH "invitations" SLASH "ed25519_key.priv", confbase);
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snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "ed25519_key.priv", confbase);
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// Remove the key if there are no outstanding invitations.
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if(!count)
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@ -332,23 +325,23 @@ int cmd_invite(int argc, char *argv[]) {
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if(!f) {
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if(errno != ENOENT) {
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fprintf(stderr, "Could not read %s: %s\n", filename, strerror(errno));
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free(filename);
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return 1;
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}
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key = ecdsa_generate();
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if(!key) {
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free(filename);
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if(!key)
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return 1;
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}
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f = fopen(filename, "w");
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if(!f) {
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fprintf(stderr, "Could not write %s: %s\n", filename, strerror(errno));
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free(filename);
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return 1;
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}
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chmod(filename, 0600);
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ecdsa_write_pem_private_key(key, f);
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if(!ecdsa_write_pem_private_key(key, f)) {
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fprintf(stderr, "Could not write ECDSA private key\n");
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fclose(f);
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return 1;
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}
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fclose(f);
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if(connect_tincd(false))
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@ -360,16 +353,13 @@ int cmd_invite(int argc, char *argv[]) {
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fprintf(stderr, "Could not read private key from %s\n", filename);
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}
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free(filename);
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if(!key)
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return 1;
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// Create a hash of the key.
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char hash[64];
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char *fingerprint = ecdsa_get_base64_public_key(key);
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digest_t *digest = digest_open_by_name("sha256", 18);
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if(!digest)
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abort();
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digest_create(digest, fingerprint, strlen(fingerprint), hash);
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sha512(fingerprint, strlen(fingerprint), hash);
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b64encode_urlsafe(hash, hash, 18);
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// Create a random cookie for this invitation.
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@ -378,20 +368,19 @@ int cmd_invite(int argc, char *argv[]) {
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// Create a filename that doesn't reveal the cookie itself
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char buf[18 + strlen(fingerprint)];
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char cookiehash[25];
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char cookiehash[64];
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memcpy(buf, cookie, 18);
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memcpy(buf + 18, fingerprint, sizeof buf - 18);
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digest_create(digest, buf, sizeof buf, cookiehash);
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sha512(buf, sizeof buf, cookiehash);
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b64encode_urlsafe(cookiehash, cookiehash, 18);
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b64encode_urlsafe(cookie, cookie, 18);
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// Create a file containing the details of the invitation.
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xasprintf(&filename, "%s" SLASH "invitations" SLASH "%s", confbase, cookiehash);
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snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "%s", confbase, cookiehash);
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int ifd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
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if(!ifd) {
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fprintf(stderr, "Could not create invitation file %s: %s\n", filename, strerror(errno));
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free(filename);
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return 1;
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}
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f = fdopen(ifd, "w");
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@ -403,7 +392,7 @@ int cmd_invite(int argc, char *argv[]) {
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// Fill in the details.
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fprintf(f, "Name = %s\n", argv[1]);
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if(netname)
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if(check_netname(netname, true))
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fprintf(f, "NetName = %s\n", netname);
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fprintf(f, "ConnectTo = %s\n", myname);
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@ -426,11 +415,10 @@ int cmd_invite(int argc, char *argv[]) {
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fprintf(f, "#---------------------------------------------------------------#\n");
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fprintf(f, "Name = %s\n", myname);
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char *filename2;
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xasprintf(&filename2, "%s" SLASH "hosts" SLASH "%s", confbase, myname);
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char filename2[PATH_MAX];
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snprintf(filename2, sizeof filename2, "%s" SLASH "hosts" SLASH "%s", confbase, myname);
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fcopy(f, filename2);
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fclose(f);
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free(filename2);
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// Create an URL from the local address, key hash and cookie
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char *url;
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@ -449,7 +437,6 @@ int cmd_invite(int argc, char *argv[]) {
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puts(url);
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free(url);
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free(filename);
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free(address);
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return 0;
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@ -554,12 +541,17 @@ static bool finalize_join(void) {
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}
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if(!check_id(name)) {
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fprintf(stderr, "Invalid Name found in invitation: %s!\n", name);
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fprintf(stderr, "Invalid Name found in invitation!\n");
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return false;
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}
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if(!netname)
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if(!netname) {
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netname = grep(data, "NetName");
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if(netname && !check_netname(netname, true)) {
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fprintf(stderr, "Unsafe NetName found in invitation!\n");
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return false;
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}
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}
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bool ask_netname = false;
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char temp_netname[32];
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@ -570,7 +562,7 @@ make_names:
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confbase = NULL;
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}
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make_names();
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make_names(false);
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free(tinc_conf);
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free(hosts_dir);
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@ -608,8 +600,8 @@ make_names:
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fprintf(f, "Name = %s\n", name);
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char *filename;
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xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
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char filename[PATH_MAX];
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snprintf(filename, sizeof filename, "%s" SLASH "%s", hosts_dir, name);
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FILE *fh = fopen(filename, "w");
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if(!fh) {
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fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
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@ -617,7 +609,19 @@ make_names:
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return false;
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}
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snprintf(filename, sizeof filename, "%s" SLASH "tinc-up.invitation", confbase);
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FILE *fup = fopen(filename, "w");
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if(!fup) {
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fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
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fclose(f);
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fclose(fh);
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return false;
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}
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ifconfig_header(fup);
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// Filter first chunk on approved keywords, split between tinc.conf and hosts/Name
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// Generate a tinc-up script from Ifconfig and Route keywords.
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// Other chunks go unfiltered to their respective host config files
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const char *p = data;
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char *l, *value;
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@ -656,6 +660,24 @@ make_names:
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break;
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}
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// Handle Ifconfig and Route statements
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if(!found) {
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if(!strcasecmp(l, "Ifconfig")) {
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if(!strcasecmp(value, "dhcp"))
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ifconfig_dhcp(fup);
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else if(!strcasecmp(value, "dhcp6"))
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ifconfig_dhcp6(fup);
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else if(!strcasecmp(value, "slaac"))
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ifconfig_slaac(fup);
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else
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ifconfig_address(fup, value);
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continue;
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} else if(!strcasecmp(l, "Route")) {
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ifconfig_route(fup, value);
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continue;
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}
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}
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// Ignore unknown and unsafe variables
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if(!found) {
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fprintf(stderr, "Ignoring unknown variable '%s' in invitation.\n", l);
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@ -670,7 +692,8 @@ make_names:
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}
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fclose(f);
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free(filename);
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bool valid_tinc_up = ifconfig_footer(fup);
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fclose(fup);
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while(l && !strcasecmp(l, "Name")) {
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if(!check_id(value)) {
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@ -683,7 +706,7 @@ make_names:
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return false;
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}
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xasprintf(&filename, "%s" SLASH "%s", hosts_dir, value);
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snprintf(filename, sizeof filename, "%s" SLASH "%s", hosts_dir, value);
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f = fopen(filename, "w");
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if(!f) {
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@ -711,7 +734,6 @@ make_names:
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}
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fclose(f);
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free(filename);
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}
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// Generate our key and send a copy to the server
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@ -723,8 +745,10 @@ make_names:
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if(!b64key)
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return false;
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xasprintf(&filename, "%s" SLASH "ed25519_key.priv", confbase);
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snprintf(filename, sizeof filename, "%s" SLASH "ed25519_key.priv", confbase);
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f = fopenmask(filename, "w", 0600);
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if(!f)
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return false;
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if(!ecdsa_write_pem_private_key(key, f)) {
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fprintf(stderr, "Error writing private key!\n");
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@ -739,20 +763,25 @@ make_names:
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sptps_send_record(&sptps, 1, b64key, strlen(b64key));
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free(b64key);
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ecdsa_free(key);
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#ifndef DISABLE_LEGACY
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rsa_t *rsa = rsa_generate(2048, 0x1001);
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xasprintf(&filename, "%s" SLASH "rsa_key.priv", confbase);
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snprintf(filename, sizeof filename, "%s" SLASH "rsa_key.priv", confbase);
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f = fopenmask(filename, "w", 0600);
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rsa_write_pem_private_key(rsa, f);
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if(!f || !rsa_write_pem_private_key(rsa, f)) {
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fprintf(stderr, "Could not write private RSA key\n");
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} else if(!rsa_write_pem_public_key(rsa, fh)) {
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fprintf(stderr, "Could not write public RSA key\n");
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}
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fclose(f);
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rsa_write_pem_public_key(rsa, fh);
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fclose(fh);
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ecdsa_free(key);
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rsa_free(rsa);
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#endif
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check_port(name);
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@ -768,17 +797,69 @@ ask_netname:
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line[strlen(line) - 1] = 0;
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char *newbase;
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xasprintf(&newbase, CONFDIR SLASH "tinc" SLASH "%s", line);
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char newbase[PATH_MAX];
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snprintf(newbase, sizeof newbase, CONFDIR SLASH "tinc" SLASH "%s", line);
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if(rename(confbase, newbase)) {
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fprintf(stderr, "Error trying to rename %s to %s: %s\n", confbase, newbase, strerror(errno));
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free(newbase);
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goto ask_netname;
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}
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free(newbase);
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netname = line;
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make_names();
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make_names(false);
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}
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char filename2[PATH_MAX];
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snprintf(filename, sizeof filename, "%s" SLASH "tinc-up.invitation", confbase);
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snprintf(filename2, sizeof filename2, "%s" SLASH "tinc-up", confbase);
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if(valid_tinc_up) {
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if(tty) {
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FILE *fup = fopen(filename, "r");
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if(fup) {
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fprintf(stderr, "\nPlease review the following tinc-up script:\n\n");
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char buf[MAXSIZE];
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while(fgets(buf, sizeof buf, fup))
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fputs(buf, stderr);
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fclose(fup);
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int response = 0;
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do {
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fprintf(stderr, "\nDo you want to use this script [y]es/[n]o/[e]dit? ");
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response = tolower(getchar());
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} while(!strchr("yne", response));
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fprintf(stderr, "\n");
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if(response == 'e') {
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char *command;
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#ifndef HAVE_MINGW
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xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ?: getenv("EDITOR") ?: "vi", filename);
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#else
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xasprintf(&command, "edit \"%s\"", filename);
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#endif
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if(system(command))
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response = 'n';
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else
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response = 'y';
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free(command);
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}
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if(response == 'y') {
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rename(filename, filename2);
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chmod(filename2, 0755);
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fprintf(stderr, "tinc-up enabled.\n");
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} else {
|
||||
fprintf(stderr, "tinc-up has been left disabled.\n");
|
||||
}
|
||||
}
|
||||
} else {
|
||||
fprintf(stderr, "A tinc-up script was generated, but has been left disabled.\n");
|
||||
}
|
||||
} else {
|
||||
// A placeholder was generated.
|
||||
rename(filename, filename2);
|
||||
chmod(filename2, 0755);
|
||||
}
|
||||
|
||||
fprintf(stderr, "Configuration stored in: %s\n", confbase);
|
||||
|
|
@ -922,16 +1003,31 @@ int cmd_join(int argc, char *argv[]) {
|
|||
if(!ai)
|
||||
return 1;
|
||||
|
||||
sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
|
||||
if(sock <= 0) {
|
||||
fprintf(stderr, "Could not open socket: %s\n", strerror(errno));
|
||||
return 1;
|
||||
struct addrinfo *aip = NULL;
|
||||
|
||||
next:
|
||||
if(!aip)
|
||||
aip = ai;
|
||||
else {
|
||||
aip = aip->ai_next;
|
||||
if(!aip)
|
||||
return 1;
|
||||
}
|
||||
|
||||
if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
|
||||
fprintf(stderr, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
|
||||
sock = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
|
||||
if(sock <= 0) {
|
||||
fprintf(stderr, "Could not open socket: %s\n", strerror(errno));
|
||||
goto next;
|
||||
}
|
||||
|
||||
if(connect(sock, aip->ai_addr, aip->ai_addrlen)) {
|
||||
char *addrstr, *portstr;
|
||||
sockaddr2str((sockaddr_t *)aip->ai_addr, &addrstr, &portstr);
|
||||
fprintf(stderr, "Could not connect to %s port %s: %s\n", addrstr, portstr, strerror(errno));
|
||||
free(addrstr);
|
||||
free(portstr);
|
||||
closesocket(sock);
|
||||
return 1;
|
||||
goto next;
|
||||
}
|
||||
|
||||
fprintf(stderr, "Connected to %s port %s...\n", address, port);
|
||||
|
|
@ -944,7 +1040,7 @@ int cmd_join(int argc, char *argv[]) {
|
|||
if(!sendline(sock, "0 ?%s %d.%d", b64key, PROT_MAJOR, 1)) {
|
||||
fprintf(stderr, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
|
||||
closesocket(sock);
|
||||
return 1;
|
||||
goto next;
|
||||
}
|
||||
|
||||
char hisname[4096] = "";
|
||||
|
|
@ -953,16 +1049,13 @@ int cmd_join(int argc, char *argv[]) {
|
|||
if(!recvline(sock, line, sizeof line) || sscanf(line, "%d %s %d.%d", &code, hisname, &hismajor, &hisminor) < 3 || code != 0 || hismajor != PROT_MAJOR || !check_id(hisname) || !recvline(sock, line, sizeof line) || !rstrip(line) || sscanf(line, "%d ", &code) != 1 || code != ACK || strlen(line) < 3) {
|
||||
fprintf(stderr, "Cannot read greeting from peer\n");
|
||||
closesocket(sock);
|
||||
return 1;
|
||||
goto next;
|
||||
}
|
||||
|
||||
// Check if the hash of the key he gave us matches the hash in the URL.
|
||||
char *fingerprint = line + 2;
|
||||
digest_t *digest = digest_open_by_name("sha256", 18);
|
||||
if(!digest)
|
||||
abort();
|
||||
char hishash[18];
|
||||
if(!digest_create(digest, fingerprint, strlen(fingerprint), hishash)) {
|
||||
char hishash[64];
|
||||
if(sha512(fingerprint, strlen(fingerprint), hishash)) {
|
||||
fprintf(stderr, "Could not create digest\n%s\n", line + 2);
|
||||
return 1;
|
||||
}
|
||||
|
|
@ -992,8 +1085,14 @@ int cmd_join(int argc, char *argv[]) {
|
|||
return 1;
|
||||
}
|
||||
|
||||
if(!sptps_receive_data(&sptps, line, len))
|
||||
return 1;
|
||||
char *p = line;
|
||||
while(len) {
|
||||
int done = sptps_receive_data(&sptps, p, len);
|
||||
if(!done)
|
||||
return 1;
|
||||
len -= done;
|
||||
p += done;
|
||||
}
|
||||
}
|
||||
|
||||
sptps_stop(&sptps);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue