#include "system.h"
-#include <openssl/pem.h>
-#include <openssl/rsa.h>
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-
#include "splay_tree.h"
+#include "cipher.h"
#include "conf.h"
#include "connection.h"
#include "control.h"
#include "device.h"
+#include "digest.h"
#include "graph.h"
#include "logger.h"
#include "net.h"
#include "process.h"
#include "protocol.h"
#include "route.h"
+#include "rsa.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
bool read_rsa_public_key(connection_t *c) {
FILE *fp;
char *fname;
- char *key;
+ char *n;
+ bool result;
cp();
- if(!c->rsa_key) {
- c->rsa_key = RSA_new();
-// RSA_blinding_on(c->rsa_key, NULL);
- }
-
/* First, check for simple PublicKey statement */
- if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
- BN_hex2bn(&c->rsa_key->n, key);
- BN_hex2bn(&c->rsa_key->e, "FFFF");
- free(key);
- return true;
+ if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
+ result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
+ free(n);
+ return result;
}
/* Else, check for PublicKeyFile statement and read it */
- if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
- free(fname);
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
-
- if(c->rsa_key)
- return true; /* Woohoo. */
+ if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
+ asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- /* If it fails, try PEM_read_RSA_PUBKEY. */
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
- free(fname);
- c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
-
- if(c->rsa_key) {
-// RSA_blinding_on(c->rsa_key, NULL);
- return true;
- }
+ fp = fopen(fname, "r");
- logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
+ if(!fp) {
+ logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
fname, strerror(errno));
+ free(fname);
return false;
}
- /* Else, check if a harnessed public key is in the config file */
-
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(fname, "r");
-
- if(fp) {
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
- }
-
- free(fname);
-
- if(c->rsa_key)
- return true;
-
- /* Try again with PEM_read_RSA_PUBKEY. */
-
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(fname, "r");
-
- if(fp) {
- c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
-// RSA_blinding_on(c->rsa_key, NULL);
- fclose(fp);
- }
+ result = rsa_read_pem_public_key(&c->rsa, fp);
+ fclose(fp);
+ if(!result)
+ logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"), fname, strerror(errno));
free(fname);
-
- if(c->rsa_key)
- return true;
-
- logger(LOG_ERR, _("No public key for %s specified!"), c->name);
-
- return false;
+ return result;
}
-bool read_rsa_private_key(void) {
+bool read_rsa_private_key() {
FILE *fp;
- char *fname, *key, *pubkey;
- struct stat s;
+ char *fname;
+ char *n, *d;
+ bool result;
cp();
- if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
- if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &pubkey)) {
+ /* First, check for simple PrivateKey statement */
+
+ if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &n)) {
logger(LOG_ERR, _("PrivateKey used but no PublicKey found!"));
+ free(d);
return false;
}
- myself->connection->rsa_key = RSA_new();
-// RSA_blinding_on(myself->connection->rsa_key, NULL);
- BN_hex2bn(&myself->connection->rsa_key->d, key);
- BN_hex2bn(&myself->connection->rsa_key->n, pubkey);
- BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
- free(key);
- free(pubkey);
+ result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
+ free(n);
+ free(d);
return true;
}
+ /* Else, check for PrivateKeyFile statement and read it */
+
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
asprintf(&fname, "%s/rsa_key.priv", confbase);
}
#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
+ struct stat s;
+
if(fstat(fileno(fp), &s)) {
- logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"),
- fname, strerror(errno));
+ logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"), fname, strerror(errno));
free(fname);
return false;
}
logger(LOG_WARNING, _("Warning: insecure file permissions for RSA private key file `%s'!"), fname);
#endif
- myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
+ result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
fclose(fp);
- if(!myself->connection->rsa_key) {
- logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
+ if(!result)
+ logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"), fname, strerror(errno));
free(fname);
- return true;
+ return result;
}
static struct event keyexpire_event;
}
void regenerate_key() {
- RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+ ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
+
+ if(!cipher_regenerate_key(&myself->cipher, true)) {
+ logger(LOG_ERR, _("Error regenerating key!"));
+ abort();
+ }
if(timeout_initialized(&keyexpire_event)) {
- ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
event_del(&keyexpire_event);
send_key_changed(broadcast, myself);
} else {
}
event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
-
- if(myself->cipher) {
- EVP_CIPHER_CTX_init(&packet_ctx);
- if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len)) {
- logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"),
- myself->name, myself->hostname, ERR_error_string(ERR_get_error(), NULL));
- abort();
- }
-
- }
}
/*
/* Generate packet encryption key */
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
- if(!strcasecmp(cipher, "none")) {
- myself->cipher = NULL;
- } else {
- myself->cipher = EVP_get_cipherbyname(cipher);
-
- if(!myself->cipher) {
- logger(LOG_ERR, _("Unrecognized cipher type!"));
- return false;
- }
- }
- } else
- myself->cipher = EVP_bf_cbc();
-
- if(myself->cipher)
- myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
- else
- myself->keylength = 1;
-
- myself->connection->outcipher = EVP_bf_ofb();
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
+ cipher = xstrdup("blowfish");
- myself->key = xmalloc(myself->keylength);
+ if(!cipher_open_by_name(&myself->cipher, cipher)) {
+ logger(LOG_ERR, _("Unrecognized cipher type!"));
+ return false;
+ }
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
keylifetime = 3600;
regenerate_key();
+
/* Check if we want to use message authentication codes... */
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
- if(!strcasecmp(digest, "none")) {
- myself->digest = NULL;
- } else {
- myself->digest = EVP_get_digestbyname(digest);
-
- if(!myself->digest) {
- logger(LOG_ERR, _("Unrecognized digest type!"));
- return false;
- }
- }
- } else
- myself->digest = EVP_sha1();
-
- myself->connection->outdigest = EVP_sha1();
-
- if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"),
- &myself->maclength)) {
- if(myself->digest) {
- if(myself->maclength > myself->digest->md_size) {
- logger(LOG_ERR, _("MAC length exceeds size of digest!"));
- return false;
- } else if(myself->maclength < 0) {
- logger(LOG_ERR, _("Bogus MAC length!"));
- return false;
- }
- }
- } else
- myself->maclength = 4;
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
+ digest = xstrdup("sha1");
- myself->connection->outmaclength = 0;
+ if(!digest_open_by_name(&myself->digest, digest)) {
+ logger(LOG_ERR, _("Unrecognized digest type!"));
+ return false;
+ }
+
+ if(!get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->maclength))
+
+ if(digest_active(&myself->digest)) {
+ if(myself->maclength > digest_length(&myself->digest)) {
+ logger(LOG_ERR, _("MAC length exceeds size of digest!"));
+ return false;
+ } else if(myself->maclength < 0) {
+ logger(LOG_ERR, _("Bogus MAC length!"));
+ return false;
+ }
+ }
/* Compression */
- if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"),
- &myself->compression)) {
+ if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->compression)) {
if(myself->compression < 0 || myself->compression > 11) {
logger(LOG_ERR, _("Bogus compression level!"));
return false;
if(!setup_device())
return false;
- event_set(&device_ev, device_fd, EV_READ|EV_PERSIST,
- handle_device_data, NULL);
+ event_set(&device_ev, device_fd, EV_READ|EV_PERSIST, handle_device_data, NULL);
+
if (event_add(&device_ev, NULL) < 0) {
logger(LOG_ERR, _("event_add failed: %s"), strerror(errno));
close_device();
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