curvetun: renamed client, server, and management files

Rename those files so that they are conform to the rest of the files
we have in our repository.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 0 insertions, 760 deletions

diff --git a/ct_usermgmt.c b/ct_usermgmt.c
deleted file mode 100644
index c303cd5..0000000
--- a/ct_usermgmt.c
+++ /dev/null
@@ -1,760 +0,0 @@
-/*
- * netsniff-ng - the packet sniffing beast
- * Copyright 2011 Daniel Borkmann.
- * Subject to the GPL, version 2.
- */
-
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <syslog.h>
-#include <limits.h>
-#include <arpa/inet.h>
-
-#include "die.h"
-#include "ct_usermgmt.h"
-#include "locking.h"
-#include "xmalloc.h"
-#include "ioexact.h"
-#include "ioops.h"
-#include "str.h"
-#include "curvetun.h"
-#include "curve.h"
-#include "crypto.h"
-#include "hash.h"
-
-struct user_store {
-	char username[256];
-	unsigned char publickey[crypto_box_pub_key_size];
-	struct curve25519_proto proto_inf;
-	struct user_store *next;
-};
-
-struct sock_map_entry {
-	int fd;
-	struct curve25519_proto *proto;
-	struct sock_map_entry *next;
-};
-
-struct sockaddr_map_entry {
-	struct sockaddr_storage *sa;
-	size_t sa_len;
-	struct curve25519_proto *proto;
-	struct sockaddr_map_entry *next;
-};
-
-static struct user_store *store = NULL;
-static struct rwlock store_lock;
-
-static struct hash_table sock_mapper;
-static struct rwlock sock_map_lock;
-
-static struct hash_table sockaddr_mapper;
-static struct rwlock sockaddr_map_lock;
-
-static unsigned char token[crypto_auth_hmacsha512256_KEYBYTES];
-
-static void init_sock_mapper(void)
-{
-	rwlock_init(&sock_map_lock);
-
-	rwlock_wr_lock(&sock_map_lock);
-
-	memset(&sock_mapper, 0, sizeof(sock_mapper));
-	init_hash(&sock_mapper);
-
-	rwlock_unlock(&sock_map_lock);
-}
-
-static void init_sockaddr_mapper(void)
-{
-	rwlock_init(&sockaddr_map_lock);
-	rwlock_wr_lock(&sockaddr_map_lock);
-
-	memset(&sockaddr_mapper, 0, sizeof(sockaddr_mapper));
-	init_hash(&sockaddr_mapper);
-
-	rwlock_unlock(&sockaddr_map_lock);
-}
-
-static int cleanup_batch_sock_mapper(void *ptr)
-{
-	struct sock_map_entry *next;
-	struct sock_map_entry *e = ptr;
-
-	if (!e)
-		return 0;
-
-	while ((next = e->next)) {
-		e->next = NULL;
-		xfree(e);
-		e = next;
-	}
-
-	xfree(e);
-
-	return 0;
-}
-
-static void destroy_sock_mapper(void)
-{
-	rwlock_wr_lock(&sock_map_lock);
-	for_each_hash(&sock_mapper, cleanup_batch_sock_mapper);
-	free_hash(&sock_mapper);
-	rwlock_unlock(&sock_map_lock);
-
-	rwlock_destroy(&sock_map_lock);
-}
-
-static int cleanup_batch_sockaddr_mapper(void *ptr)
-{
-	struct sockaddr_map_entry *next;
-	struct sockaddr_map_entry *e = ptr;
-
-	if (!e)
-		return 0;
-
-	while ((next = e->next)) {
-		e->next = NULL;
-		xfree(e);
-		e = next;
-	}
-
-	xfree(e);
-	return 0;
-}
-
-static void destroy_sockaddr_mapper(void)
-{
-	rwlock_wr_lock(&sockaddr_map_lock);
-	for_each_hash(&sockaddr_mapper, cleanup_batch_sockaddr_mapper);
-	free_hash(&sockaddr_mapper);
-	rwlock_unlock(&sockaddr_map_lock);
-
-	rwlock_destroy(&sockaddr_map_lock);
-}
-
-static struct user_store *user_store_alloc(void)
-{
-	return xzmalloc(sizeof(struct user_store));
-}
-
-static void user_store_free(struct user_store *us)
-{
-	if (!us)
-		return;
-	memset(us, 0, sizeof(struct user_store));
-	xfree(us);
-}
-
-/* already in lock */
-static int __check_duplicate_username(char *username, size_t len)
-{
-	int duplicate = 0;
-	struct user_store *elem = store;
-
-	while (elem) {
-		if (!memcmp(elem->username, username,
-			    strlen(elem->username) + 1)) {
-			duplicate = 1;
-			break;
-		}
-		elem = elem->next;
-	}
-
-	return duplicate;
-}
-
-/* already in lock */
-static int __check_duplicate_pubkey(unsigned char *pubkey, size_t len)
-{
-	int duplicate = 0;
-	struct user_store *elem = store;
-
-	while (elem) {
-		if (!memcmp(elem->publickey, pubkey,
-			    sizeof(elem->publickey))) {
-			duplicate = 1;
-			break;
-		}
-		elem = elem->next;
-	}
-
-	return duplicate;
-}
-
-enum parse_states {
-	PARSE_USERNAME,
-	PARSE_PUBKEY,
-	PARSE_DONE,
-};
-
-static int parse_line(char *line, char *homedir)
-{
-	char *str;
-	enum parse_states s = PARSE_USERNAME;
-	struct user_store *elem;
-	unsigned char pkey[crypto_box_pub_key_size];
-
-	elem = user_store_alloc();
-	elem->next = store;
-
-	str = strtok(line, ";");
-	for (; str != NULL;) {
-		switch (s) {
-		case PARSE_USERNAME:
-			if (__check_duplicate_username(str, strlen(str) + 1))
-				return -EINVAL;
-			strlcpy(elem->username, str, sizeof(elem->username));
-			s = PARSE_PUBKEY;
-			break;
-		case PARSE_PUBKEY:
-			if (!curve25519_pubkey_hexparse_32(pkey, sizeof(pkey),
-							   str, strlen(str)))
-				return -EINVAL;
-			if (__check_duplicate_pubkey(pkey, sizeof(pkey)))
-				return -EINVAL;
-			memcpy(elem->publickey, pkey, sizeof(elem->publickey));
-			curve25519_proto_init(&elem->proto_inf, elem->publickey, sizeof(elem->publickey));
-			s = PARSE_DONE;
-			break;
-		case PARSE_DONE:
-			break;
-		default:
-			return -EIO;
-		}
-
-		str = strtok(NULL, ";");
-	}
-
-	store = elem;
-	return s == PARSE_DONE ? 0 : -EIO;
-}
-
-void parse_userfile_and_generate_user_store_or_die(char *homedir)
-{
-	FILE *fp;
-	char path[PATH_MAX], buff[512];
-	int line = 1, ret, fd;
-
-	memset(path, 0, sizeof(path));
-	slprintf(path, sizeof(path), "%s/%s", homedir, FILE_CLIENTS);
-
-	rwlock_init(&store_lock);
-	rwlock_wr_lock(&store_lock);
-
-	fp = fopen(path, "r");
-	if (!fp)
-		panic("Cannot open client file!\n");
-
-	memset(buff, 0, sizeof(buff));
-	while (fgets(buff, sizeof(buff), fp) != NULL) {
-		buff[sizeof(buff) - 1] = 0;
-		/* A comment. Skip this line */
-		if (buff[0] == '#' || buff[0] == '\n') {
-			memset(buff, 0, sizeof(buff));
-			line++;
-			continue;
-		}
-
-		ret = parse_line(buff, homedir);
-		if (ret < 0)
-			panic("Cannot parse line %d from clients!\n", line);
-		line++;
-		memset(buff, 0, sizeof(buff));
-	}
-
-	fclose(fp);
-
-	if (store == NULL)
-		panic("No registered clients found!\n");
-
-	rwlock_unlock(&store_lock);
-
-	init_sock_mapper();
-	init_sockaddr_mapper();
-
-	/*
-	 * Pubkey is also used as a hmac of the initial packet to check
-	 * the integrity of the packet, so that we know if it's just random
-	 * garbage or a 'valid' packet. Again, just for the integrity!
-	 */
-
-	memset(path, 0, sizeof(path));
-	slprintf(path, sizeof(path), "%s/%s", homedir, FILE_PUBKEY);
-
-	fd = open_or_die(path, O_RDONLY);
-	ret = read(fd, token, sizeof(token));
-	if (ret != crypto_auth_hmacsha512256_KEYBYTES)
-		panic("Cannot read public key!\n");
-	close(fd);
-}
-
-void dump_user_store(void)
-{
-	int i;
-	struct user_store *elem;
-
-	rwlock_rd_lock(&store_lock);
-
-	elem = store;
-	while (elem) {
-		printf("%s -> ", elem->username);
-		for (i = 0; i < sizeof(elem->publickey); ++i)
-			if (i == (sizeof(elem->publickey) - 1))
-				printf("%02x\n", (unsigned char)
-				       elem->publickey[i]);
-			else
-				printf("%02x:", (unsigned char)
-				       elem->publickey[i]);
-		elem = elem->next;
-	}
-
-	rwlock_unlock(&store_lock);
-}
-
-void destroy_user_store(void)
-{
-	struct user_store *elem, *nelem = NULL;
-
-	rwlock_wr_lock(&store_lock);
-
-	elem = store;
-	while (elem) {
-		nelem = elem->next;
-		elem->next = NULL;
-		user_store_free(elem);
-		elem = nelem;
-	}
-	rwlock_unlock(&store_lock);
-
-	rwlock_destroy(&store_lock);
-
-	destroy_sock_mapper();
-	destroy_sockaddr_mapper();
-}
-
-int username_msg(char *username, size_t len, char *dst, size_t dlen)
-{
-	int fd;
-	ssize_t ret;
-	uint32_t salt;
-	unsigned char h[crypto_hash_sha512_BYTES];
-	struct username_struct *us = (struct username_struct *) dst;
-	char *uname;
-	size_t uname_len;
-
-	if (dlen < sizeof(struct username_struct))
-		return -ENOMEM;
-
-	uname_len = 512;
-	uname = xzmalloc(uname_len);
-
-	fd = open_or_die("/dev/random", O_RDONLY);
-	ret = read_exact(fd, &salt, sizeof(salt), 0);
-	if (ret != sizeof(salt))
-		panic("Cannot read from /dev/random!\n");
-	close(fd);
-
-	slprintf(uname, uname_len, "%s%u", username, salt);
-	crypto_hash_sha512(h, (unsigned char *) uname, strlen(uname));
-
-	us->salt = htonl(salt);
-	memcpy(us->hash, h, sizeof(us->hash));
-
-	xfree(uname);
-	return 0;
-}
-
-enum is_user_enum username_msg_is_user(char *src, size_t slen, char *username,
-				       size_t len)
-{
-	char *uname;
-	size_t uname_len;
-	uint32_t salt;
-	struct username_struct *us = (struct username_struct *) src;
-	unsigned char h[crypto_hash_sha512_BYTES];
-
-	if (slen < sizeof(struct username_struct)) {
-		errno = ENOMEM;
-		return USERNAMES_ERR;
-	}
-
-	uname_len = 512;
-	uname = xzmalloc(uname_len);
-
-	salt = ntohl(us->salt);
-
-	slprintf(uname, uname_len, "%s%u", username, salt);
-	crypto_hash_sha512(h, (unsigned char *) uname, strlen(uname));
-	xfree(uname);
-
-	if (!crypto_verify_32(&h[0], &us->hash[0]) &&
-	    !crypto_verify_32(&h[32], &us->hash[32]))
-		return USERNAMES_OK;
-	else
-		return USERNAMES_NE;
-}
-
-static int register_user_by_socket(int fd, struct curve25519_proto *proto)
-{
-	void **pos;
-	struct sock_map_entry *entry;
-
-	rwlock_wr_lock(&sock_map_lock);
-
-	entry = xzmalloc(sizeof(*entry));
-	entry->fd = fd;
-	entry->proto = proto;
-
-	pos = insert_hash(entry->fd, entry, &sock_mapper);
-	if (pos) {
-		entry->next = (*pos);
-		(*pos) = entry;
-	}
-
-	rwlock_unlock(&sock_map_lock);
-
-	return 0;
-}
-
-static int register_user_by_sockaddr(struct sockaddr_storage *sa,
-				     size_t sa_len,
-				     struct curve25519_proto *proto)
-{
-	void **pos;
-	struct sockaddr_map_entry *entry;
-	unsigned int hash = hash_name((char *) sa, sa_len);
-
-	rwlock_wr_lock(&sockaddr_map_lock);
-
-	entry = xzmalloc(sizeof(*entry));
-	entry->sa = xmemdupz(sa, sa_len);
-	entry->sa_len = sa_len;
-	entry->proto = proto;
-
-	pos = insert_hash(hash, entry, &sockaddr_mapper);
-	if (pos) {
-		entry->next = (*pos);
-		(*pos) = entry;
-	}
-
-	rwlock_unlock(&sockaddr_map_lock);
-
-	return 0;
-}
-
-int try_register_user_by_socket(struct curve25519_struct *c,
-				char *src, size_t slen, int sock, int log)
-{
-	int ret = -1;
-	char *cbuff = NULL;
-	size_t real_len = 132;
-	ssize_t clen;
-	struct user_store *elem;
-	enum is_user_enum err;
-	unsigned char auth[crypto_auth_hmacsha512256_BYTES];
-	struct taia arrival_taia;
-
-	/* assert(132 == clen + sizeof(auth)); */
-	/*
-	 * Check hmac first, if malicious, drop immediately before we
-	 * investigate more efforts.
-	 */
-	if (slen < real_len)
-		return -1;
-
-	taia_now(&arrival_taia);
-
-	memcpy(auth, src, sizeof(auth));
-
-	src += sizeof(auth);
-	real_len -= sizeof(auth);
-
-	if (crypto_auth_hmacsha512256_verify(auth, (unsigned char *) src,
-					     real_len, token)) {
-		syslog(LOG_ERR, "Bad packet hmac for id %d! Dropping!\n", sock);
-		return -1;
-	} else {
-		if (log)
-			syslog(LOG_INFO, "Good packet hmac for id %d!\n", sock);
-	}
-
-	rwlock_rd_lock(&store_lock);
-
-	elem = store;
-	while (elem) {
-		clen = curve25519_decode(c, &elem->proto_inf,
-					 (unsigned char *) src, real_len,
-					 (unsigned char **) &cbuff,
-					 &arrival_taia);
-		if (clen <= 0) {
-			elem = elem->next;
-			continue;
-		}
-
-		cbuff += crypto_box_zerobytes;
-		clen -= crypto_box_zerobytes;
-
-		if (log)
-			syslog(LOG_INFO, "Packet decoded successfully for id %d!\n", sock);
-
-		err = username_msg_is_user(cbuff, clen, elem->username,
-					   strlen(elem->username) + 1);
-		if (err == USERNAMES_OK) {
-			if (log)
-				syslog(LOG_INFO, "Found user %s for id %d! Registering ...\n",
-				       elem->username, sock);
-			ret = register_user_by_socket(sock, &elem->proto_inf);
-			break;
-		}
-
-		elem = elem->next;
-	}
-
-	rwlock_unlock(&store_lock);
-
-	if (ret == -1)
-		syslog(LOG_ERR, "User not found! Dropping connection!\n");
-
-	return ret;
-}
-
-int try_register_user_by_sockaddr(struct curve25519_struct *c,
-				  char *src, size_t slen,
-				  struct sockaddr_storage *sa,
-				  size_t sa_len, int log)
-{
-	int ret = -1;
-	char *cbuff = NULL;
-	struct user_store *elem;
-	ssize_t clen;
-	size_t real_len = 132;
-	enum is_user_enum err;
-	unsigned char auth[crypto_auth_hmacsha512256_BYTES];
-	struct taia arrival_taia;
-
-	/* assert(132 == clen + sizeof(auth)); */
-	/*
-	 * Check hmac first, if malicious, drop immediately before we
-	 * investigate more efforts.
-	 */
-	if (slen < real_len)
-		return -1;
-
-	taia_now(&arrival_taia);
-
-	memcpy(auth, src, sizeof(auth));
-
-	src += sizeof(auth);
-	real_len -= sizeof(auth);
-
-	if (crypto_auth_hmacsha512256_verify(auth, (unsigned char *) src,
-					     real_len, token)) {
-		syslog(LOG_ERR, "Got bad packet hmac! Dropping!\n");
-		return -1;
-	} else {
-		if (log)
-			syslog(LOG_INFO, "Got good packet hmac!\n");
-	}
-
-	rwlock_rd_lock(&store_lock);
-
-	elem = store;
-	while (elem) {
-		clen = curve25519_decode(c, &elem->proto_inf,
-					 (unsigned char *) src, real_len,
-					 (unsigned char **) &cbuff,
-					 &arrival_taia);
-		if (clen <= 0) {
-			elem = elem->next;
-			continue;
-		}
-
-		cbuff += crypto_box_zerobytes;
-		clen -= crypto_box_zerobytes;
-
-		if (log)
-			syslog(LOG_INFO, "Packet decoded successfully!\n");
-
-		err = username_msg_is_user(cbuff, clen, elem->username,
-					   strlen(elem->username) + 1);
-		if (err == USERNAMES_OK) {
-			if (log)
-				syslog(LOG_INFO, "Found user %s! Registering ...\n",
-				       elem->username);
-			ret = register_user_by_sockaddr(sa, sa_len,
-							&elem->proto_inf);
-			break;
-		}
-
-		elem = elem->next;
-	}
-
-	rwlock_unlock(&store_lock);
-
-	if (ret == -1)
-		syslog(LOG_ERR, "User not found! Dropping connection!\n");
-
-	return ret;
-}
-
-int get_user_by_socket(int fd, struct curve25519_proto **proto)
-{
-	int ret = -1;
-	struct sock_map_entry *entry;
-
-	errno = 0;
-
-	rwlock_rd_lock(&sock_map_lock);
-
-	entry = lookup_hash(fd, &sock_mapper);
-	while (entry && fd != entry->fd)
-		entry = entry->next;
-	if (entry && fd == entry->fd) {
-		(*proto) = entry->proto;
-		ret = 0;
-	} else {
-		(*proto) = NULL;
-		errno = ENOENT;
-	}
-
-	rwlock_unlock(&sock_map_lock);
-
-	return ret;
-}
-
-int get_user_by_sockaddr(struct sockaddr_storage *sa, size_t sa_len,
-			 struct curve25519_proto **proto)
-{
-	int ret = -1;
-	struct sockaddr_map_entry *entry;
-	unsigned int hash = hash_name((char *) sa, sa_len);
-
-	errno = 0;
-
-	rwlock_rd_lock(&sockaddr_map_lock);
-
-	entry = lookup_hash(hash, &sockaddr_mapper);
-	while (entry && entry->sa_len == sa_len &&
-	       memcmp(sa, entry->sa, entry->sa_len))
-		entry = entry->next;
-	if (entry && entry->sa_len == sa_len &&
-	    !memcmp(sa, entry->sa, entry->sa_len)) {
-		(*proto) = entry->proto;
-		ret = 0;
-	} else {
-		(*proto) = NULL;
-		errno = ENOENT;
-	}
-
-	rwlock_unlock(&sockaddr_map_lock);
-
-	return ret;
-}
-
-static struct sock_map_entry *socket_to_sock_map_entry(int fd)
-{
-	struct sock_map_entry *entry, *ret = NULL;
-
-	errno = 0;
-
-	rwlock_rd_lock(&sock_map_lock);
-
-	entry = lookup_hash(fd, &sock_mapper);
-	while (entry && fd != entry->fd)
-		entry = entry->next;
-	if (entry && fd == entry->fd)
-		ret = entry;
-	else
-		errno = ENOENT;
-
-	rwlock_unlock(&sock_map_lock);
-
-	return ret;
-}
-
-void remove_user_by_socket(int fd)
-{
-	struct sock_map_entry *pos;
-	struct sock_map_entry *entry = socket_to_sock_map_entry(fd);
-
-	if (!entry)
-		return;
-
-	rwlock_wr_lock(&sock_map_lock);
-
-	pos = remove_hash(entry->fd, entry, entry->next, &sock_mapper);
-	while (pos && pos->next && pos->next != entry)
-		pos = pos->next;
-	if (pos && pos->next && pos->next == entry)
-		pos->next = entry->next;
-
-	memset(entry->proto->enonce, 0, sizeof(entry->proto->enonce));
-	memset(entry->proto->dnonce, 0, sizeof(entry->proto->dnonce));
-
-	entry->proto = NULL;
-	entry->next = NULL;
-
-	xfree(entry);
-
-	rwlock_unlock(&sock_map_lock);
-}
-
-static struct sockaddr_map_entry *
-sockaddr_to_sockaddr_map_entry(struct sockaddr_storage *sa, size_t sa_len)
-{
-	struct sockaddr_map_entry *entry, *ret = NULL;
-	unsigned int hash = hash_name((char *) sa, sa_len);
-
-	errno = 0;
-
-	rwlock_rd_lock(&sockaddr_map_lock);
-
-	entry = lookup_hash(hash, &sockaddr_mapper);
-	while (entry && entry->sa_len == sa_len &&
-	       memcmp(sa, entry->sa, entry->sa_len))
-		entry = entry->next;
-	if (entry && entry->sa_len == sa_len &&
-	    !memcmp(sa, entry->sa, entry->sa_len))
-		ret = entry;
-	else
-		errno = ENOENT;
-
-	rwlock_unlock(&sockaddr_map_lock);
-
-	return ret;
-}
-
-void remove_user_by_sockaddr(struct sockaddr_storage *sa, size_t sa_len)
-{
-	struct sockaddr_map_entry *pos;
-	struct sockaddr_map_entry *entry;
-	unsigned int hash = hash_name((char *) sa, sa_len);
-
-	entry = sockaddr_to_sockaddr_map_entry(sa, sa_len);
-	if (!entry)
-		return;
-
-	rwlock_wr_lock(&sockaddr_map_lock);
-
-	pos = remove_hash(hash, entry, entry->next, &sockaddr_mapper);
-	while (pos && pos->next && pos->next != entry)
-		pos = pos->next;
-	if (pos && pos->next && pos->next == entry)
-		pos->next = entry->next;
-
-	memset(entry->proto->enonce, 0, sizeof(entry->proto->enonce));
-	memset(entry->proto->dnonce, 0, sizeof(entry->proto->dnonce));
-
-	entry->proto = NULL;
-	entry->next = NULL;
-
-	xfree(entry->sa);
-	xfree(entry);
-
-	rwlock_unlock(&sockaddr_map_lock);
-}