X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_auth.c;h=59cab66f85aced6f7947344cfd258924891adac0;hp=dafcc20c2d29a1e49b1541296e25b7bce2d5514f;hb=38c2d6c1dae3f09c68baa37fd24caa2e0ec6d8ad;hpb=6c5f3d8b74ffea1522a727ef189a5ba65a939e07 diff --git a/src/protocol_auth.c b/src/protocol_auth.c index dafcc20c..59cab66f 100644 --- a/src/protocol_auth.c +++ b/src/protocol_auth.c @@ -1,7 +1,7 @@ /* protocol_auth.c -- handle the meta-protocol, authentication - Copyright (C) 1999-2003 Ivo Timmermans , - 2000-2003 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2007 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -17,13 +17,14 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: protocol_auth.c,v 1.1.4.26 2003/08/28 21:05:11 guus Exp $ + $Id$ */ #include "system.h" #include #include +#include #include #include "avl_tree.h" @@ -50,7 +51,6 @@ bool send_id(connection_t *c) bool id_h(connection_t *c) { char name[MAX_STRING_SIZE]; - bool choice; cp(); @@ -68,16 +68,19 @@ bool id_h(connection_t *c) return false; } - /* If we set c->name in advance, make sure we are connected to the right host */ + /* If this is an outgoing connection, make sure we are connected to the right host */ - if(c->name) { + if(c->outgoing) { if(strcmp(c->name, name)) { logger(LOG_ERR, _("Peer %s is %s instead of %s"), c->hostname, name, c->name); return false; } - } else + } else { + if(c->name) + free(c->name); c->name = xstrdup(name); + } /* Check if version matches */ @@ -108,14 +111,6 @@ bool id_h(connection_t *c) return false; } - /* Check some options */ - - if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &choice) && choice) || myself->options & OPTION_INDIRECT) - c->options |= OPTION_INDIRECT; - - if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &choice) && choice) || myself->options & OPTION_TCPONLY) - c->options |= OPTION_TCPONLY | OPTION_INDIRECT; - c->allow_request = METAKEY; return send_metakey(c); @@ -123,7 +118,7 @@ bool id_h(connection_t *c) bool send_metakey(connection_t *c) { - char buffer[MAX_STRING_SIZE]; + char *buffer; int len; bool x; @@ -133,6 +128,8 @@ bool send_metakey(connection_t *c) /* Allocate buffers for the meta key */ + buffer = alloca(2 * len + 1); + if(!c->outkey) c->outkey = xmalloc(len); @@ -141,7 +138,7 @@ bool send_metakey(connection_t *c) cp(); /* Copy random data to the buffer */ - RAND_bytes(c->outkey, len); + RAND_pseudo_bytes((unsigned char *)c->outkey, len); /* The message we send must be smaller than the modulus of the RSA key. By definition, for a key of k bits, the following formula holds: @@ -169,7 +166,7 @@ bool send_metakey(connection_t *c) with a length equal to that of the modulus of the RSA key. */ - if(RSA_public_encrypt(len, c->outkey, buffer, c->rsa_key, RSA_NO_PADDING) != len) { + if(RSA_public_encrypt(len, (unsigned char *)c->outkey, (unsigned char *)buffer, c->rsa_key, RSA_NO_PADDING) != len) { logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname); return false; @@ -190,10 +187,14 @@ bool send_metakey(connection_t *c) /* Further outgoing requests are encrypted with the key we just generated */ if(c->outcipher) { - EVP_EncryptInit(c->outctx, c->outcipher, - c->outkey + len - c->outcipher->key_len, - c->outkey + len - c->outcipher->key_len - - c->outcipher->iv_len); + if(!EVP_EncryptInit(c->outctx, c->outcipher, + (unsigned char *)c->outkey + len - c->outcipher->key_len, + (unsigned char *)c->outkey + len - c->outcipher->key_len - + c->outcipher->iv_len)) { + logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"), + c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL)); + return false; + } c->status.encryptout = true; } @@ -238,8 +239,8 @@ bool metakey_h(connection_t *c) /* Decrypt the meta key */ - if(RSA_private_decrypt(len, buffer, c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) { /* See challenge() */ - logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), + if(RSA_private_decrypt(len, (unsigned char *)buffer, (unsigned char *)c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) { /* See challenge() */ + logger(LOG_ERR, _("Error during decryption of meta key for %s (%s)"), c->name, c->hostname); return false; } @@ -262,10 +263,14 @@ bool metakey_h(connection_t *c) return false; } - EVP_DecryptInit(c->inctx, c->incipher, - c->inkey + len - c->incipher->key_len, - c->inkey + len - c->incipher->key_len - - c->incipher->iv_len); + if(!EVP_DecryptInit(c->inctx, c->incipher, + (unsigned char *)c->inkey + len - c->incipher->key_len, + (unsigned char *)c->inkey + len - c->incipher->key_len - + c->incipher->iv_len)) { + logger(LOG_ERR, _("Error during initialisation of cipher from %s (%s): %s"), + c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL)); + return false; + } c->status.decryptin = true; } else { @@ -299,7 +304,7 @@ bool metakey_h(connection_t *c) bool send_challenge(connection_t *c) { - char buffer[MAX_STRING_SIZE]; + char *buffer; int len; cp(); @@ -310,12 +315,14 @@ bool send_challenge(connection_t *c) /* Allocate buffers for the challenge */ + buffer = alloca(2 * len + 1); + if(!c->hischallenge) c->hischallenge = xmalloc(len); /* Copy random data to the buffer */ - RAND_bytes(c->hischallenge, len); + RAND_pseudo_bytes((unsigned char *)c->hischallenge, len); /* Convert to hex */ @@ -375,10 +382,13 @@ bool send_chal_reply(connection_t *c) /* Calculate the hash from the challenge we received */ - EVP_DigestInit(&ctx, c->indigest); - EVP_DigestUpdate(&ctx, c->mychallenge, - RSA_size(myself->connection->rsa_key)); - EVP_DigestFinal(&ctx, hash, NULL); + if(!EVP_DigestInit(&ctx, c->indigest) + || !EVP_DigestUpdate(&ctx, c->mychallenge, RSA_size(myself->connection->rsa_key)) + || !EVP_DigestFinal(&ctx, (unsigned char *)hash, NULL)) { + logger(LOG_ERR, _("Error during calculation of response for %s (%s): %s"), + c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL)); + return false; + } /* Convert the hash to a hexadecimal formatted string */ @@ -418,9 +428,13 @@ bool chal_reply_h(connection_t *c) /* Calculate the hash from the challenge we sent */ - EVP_DigestInit(&ctx, c->outdigest); - EVP_DigestUpdate(&ctx, c->hischallenge, RSA_size(c->rsa_key)); - EVP_DigestFinal(&ctx, myhash, NULL); + if(!EVP_DigestInit(&ctx, c->outdigest) + || !EVP_DigestUpdate(&ctx, c->hischallenge, RSA_size(c->rsa_key)) + || !EVP_DigestFinal(&ctx, (unsigned char *)myhash, NULL)) { + logger(LOG_ERR, _("Error during calculation of response from %s (%s): %s"), + c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL)); + return false; + } /* Verify the incoming hash with the calculated hash */ @@ -452,6 +466,7 @@ bool send_ack(connection_t *c) to create node_t and edge_t structures. */ struct timeval now; + bool choice; cp(); @@ -460,6 +475,19 @@ bool send_ack(connection_t *c) gettimeofday(&now, NULL); c->estimated_weight = (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec - c->start.tv_usec) / 1000; + /* Check some options */ + + if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &choice) && choice) || myself->options & OPTION_INDIRECT) + c->options |= OPTION_INDIRECT; + + if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &choice) && choice) || myself->options & OPTION_TCPONLY) + c->options |= OPTION_TCPONLY | OPTION_INDIRECT; + + if((get_config_bool(lookup_config(c->config_tree, "PMTUDiscovery"), &choice) && choice) || myself->options & OPTION_PMTU_DISCOVERY) + c->options |= OPTION_PMTU_DISCOVERY; + + get_config_int(lookup_config(c->config_tree, "Weight"), &c->estimated_weight); + return send_request(c, "%d %s %d %lx", ACK, myport, c->estimated_weight, c->options); } @@ -472,6 +500,15 @@ static void send_everything(connection_t *c) /* Send all known subnets and edges */ + if(tunnelserver) { + for(node = myself->subnet_tree->head; node; node = node->next) { + s = node->data; + send_add_subnet(c, s); + } + + return; + } + for(node = node_tree->head; node; node = node->next) { n = node->data; @@ -491,7 +528,7 @@ bool ack_h(connection_t *c) { char hisport[MAX_STRING_SIZE]; char *hisaddress, *dummy; - int weight; + int weight, mtu; long int options; node_t *n; @@ -526,6 +563,12 @@ bool ack_h(connection_t *c) c->node = n; c->options |= options; + if(get_config_int(lookup_config(c->config_tree, "PMTU"), &mtu) && mtu < n->mtu) + n->mtu = mtu; + + if(get_config_int(lookup_config(myself->connection->config_tree, "PMTU"), &mtu) && mtu < n->mtu) + n->mtu = mtu; + /* Activate this connection */ c->allow_request = ALL; @@ -556,7 +599,10 @@ bool ack_h(connection_t *c) /* Notify everyone of the new edge */ - send_add_edge(broadcast, c->edge); + if(tunnelserver) + send_add_edge(c, c->edge); + else + send_add_edge(broadcast, c->edge); /* Run MST and SSSP algorithms */