/* * Copyright (C) 2006 Stig Venaas * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. */ /* TODO: * accounting * radius keep alives (server status) * setsockopt(keepalive...), check if openssl has some keepalive feature */ /* For UDP there is one server instance consisting of udpserverrd and udpserverth * rd is responsible for init and launching wr * For TLS there is a server instance that launches tlsserverrd for each TLS peer * each tlsserverrd launches tlsserverwr * For each UDP/TLS peer there is clientrd and clientwr, clientwr is responsible * for init and launching rd * * serverrd will receive a request, processes it and puts it in the requestq of * the appropriate clientwr * clientwr monitors its requestq and sends requests * clientrd looks for responses, processes them and puts them in the replyq of * the peer the request came from * serverwr monitors its reply and sends replies * * In addition to the main thread, we have: * If UDP peers are configured, there will be 2 + 2 * #peers UDP threads * If TLS peers are configured, there will initially be 2 * #peers TLS threads * For each TLS peer connecting to us there will be 2 more TLS threads * This is only for connected peers * Example: With 3 UDP peer and 30 TLS peers, there will be a max of * 1 + (2 + 2 * 3) + (2 * 30) + (2 * 30) = 129 threads */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "radsecproxy.h" static struct options options; static struct client *clients; static struct server *servers; static int client_udp_count = 0; static int client_tls_count = 0; static int client_count = 0; static int server_udp_count = 0; static int server_tls_count = 0; static int server_count = 0; static struct replyq udp_server_replyq; static int udp_server_sock = -1; static pthread_mutex_t *ssl_locks; static long *ssl_lock_count; static SSL_CTX *ssl_ctx = NULL; extern int optind; extern char *optarg; /* callbacks for making OpenSSL thread safe */ unsigned long ssl_thread_id() { return (unsigned long)pthread_self(); } void ssl_locking_callback(int mode, int type, const char *file, int line) { if (mode & CRYPTO_LOCK) { pthread_mutex_lock(&ssl_locks[type]); ssl_lock_count[type]++; } else pthread_mutex_unlock(&ssl_locks[type]); } static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata) { int pwdlen = strlen(userdata); if (rwflag != 0 || pwdlen > size) /* not for decryption or too large */ return 0; memcpy(buf, userdata, pwdlen); return pwdlen; } static int verify_cb(int ok, X509_STORE_CTX *ctx) { char buf[256]; X509 *err_cert; int err, depth; err_cert = X509_STORE_CTX_get_current_cert(ctx); err = X509_STORE_CTX_get_error(ctx); depth = X509_STORE_CTX_get_error_depth(ctx); if (depth > MAX_CERT_DEPTH) { ok = 0; err = X509_V_ERR_CERT_CHAIN_TOO_LONG; X509_STORE_CTX_set_error(ctx, err); } if (!ok) { X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256); printf("verify error: num=%d:%s:depth=%d:%s\n", err, X509_verify_cert_error_string(err), depth, buf); switch (err) { case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf, 256); printf("issuer=%s\n", buf); break; case X509_V_ERR_CERT_NOT_YET_VALID: case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: printf("Certificate not yet valid\n"); break; case X509_V_ERR_CERT_HAS_EXPIRED: printf("Certificate has expired\n"); break; case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: printf("Certificate no longer valid (after notAfter)\n"); break; } } /* printf("certificate verify returns %d\n", ok); */ return ok; } SSL_CTX *ssl_init() { SSL_CTX *ctx; int i; unsigned long error; if (!options.tlscertificatefile || !options.tlscertificatekeyfile) { printf("TLSCertificateFile and TLSCertificateKeyFile must be specified for TLS\n"); exit(1); } if (!options.tlscacertificatefile && !options.tlscacertificatepath) { printf("CA Certificate file/path need to be configured\n"); exit(1); } ssl_locks = malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t)); ssl_lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long)); for (i = 0; i < CRYPTO_num_locks(); i++) { ssl_lock_count[i] = 0; pthread_mutex_init(&ssl_locks[i], NULL); } CRYPTO_set_id_callback(ssl_thread_id); CRYPTO_set_locking_callback(ssl_locking_callback); SSL_load_error_strings(); SSL_library_init(); while (!RAND_status()) { time_t t = time(NULL); pid_t pid = getpid(); RAND_seed((unsigned char *)&t, sizeof(time_t)); RAND_seed((unsigned char *)&pid, sizeof(pid)); } ctx = SSL_CTX_new(TLSv1_method()); if (options.tlscertificatekeypassword) { SSL_CTX_set_default_passwd_cb_userdata(ctx, options.tlscertificatekeypassword); SSL_CTX_set_default_passwd_cb(ctx, pem_passwd_cb); } if (SSL_CTX_use_certificate_chain_file(ctx, options.tlscertificatefile) && SSL_CTX_use_PrivateKey_file(ctx, options.tlscertificatekeyfile, SSL_FILETYPE_PEM) && SSL_CTX_check_private_key(ctx) && SSL_CTX_load_verify_locations(ctx, options.tlscacertificatefile, options.tlscacertificatepath)) { SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, verify_cb); SSL_CTX_set_verify_depth(ctx, MAX_CERT_DEPTH + 1); return ctx; } while ((error = ERR_get_error())) err("SSL: %s", ERR_error_string(error, NULL)); exit(1); } void printauth(char *s, unsigned char *t) { int i; printf("%s:", s); for (i = 0; i < 16; i++) printf("%02x ", t[i]); printf("\n"); } int resolvepeer(struct peer *peer) { struct addrinfo hints, *addrinfo; memset(&hints, 0, sizeof(hints)); hints.ai_socktype = (peer->type == 'T' ? SOCK_STREAM : SOCK_DGRAM); hints.ai_family = AF_UNSPEC; if (getaddrinfo(peer->host, peer->port, &hints, &addrinfo)) { err("resolvepeer: can't resolve %s port %s", peer->host, peer->port); return 0; } if (peer->addrinfo) freeaddrinfo(peer->addrinfo); peer->addrinfo = addrinfo; return 1; } int connecttoserver(struct addrinfo *addrinfo) { int s; struct addrinfo *res; for (res = addrinfo; res; res = res->ai_next) { s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); if (s < 0) { err("connecttoserver: socket failed"); continue; } if (connect(s, res->ai_addr, res->ai_addrlen) == 0) break; err("connecttoserver: connect failed"); close(s); s = -1; } return s; } /* returns the client with matching address, or NULL */ /* if client argument is not NULL, we only check that one client */ struct client *find_client(char type, struct sockaddr *addr, struct client *client) { struct sockaddr_in6 *sa6; struct in_addr *a4 = NULL; struct client *c; int i; struct addrinfo *res; if (addr->sa_family == AF_INET6) { sa6 = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12]; } else a4 = &((struct sockaddr_in *)addr)->sin_addr; c = (client ? client : clients); for (i = 0; i < client_count; i++) { if (c->peer.type == type) for (res = c->peer.addrinfo; res; res = res->ai_next) if ((a4 && res->ai_family == AF_INET && !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) || (res->ai_family == AF_INET6 && !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16))) return c; if (client) break; c++; } return NULL; } /* returns the server with matching address, or NULL */ /* if server argument is not NULL, we only check that one server */ struct server *find_server(char type, struct sockaddr *addr, struct server *server) { struct sockaddr_in6 *sa6; struct in_addr *a4 = NULL; struct server *s; int i; struct addrinfo *res; if (addr->sa_family == AF_INET6) { sa6 = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12]; } else a4 = &((struct sockaddr_in *)addr)->sin_addr; s = (server ? server : servers); for (i = 0; i < server_count; i++) { if (s->peer.type == type) for (res = s->peer.addrinfo; res; res = res->ai_next) if ((a4 && res->ai_family == AF_INET && !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) || (res->ai_family == AF_INET6 && !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16))) return s; if (server) break; s++; } return NULL; } /* exactly one of client and server must be non-NULL */ /* if *peer == NULL we return who we received from, else require it to be from peer */ /* return from in sa if not NULL */ unsigned char *radudpget(int s, struct client **client, struct server **server, struct sockaddr_storage *sa) { int cnt, len; void *f; unsigned char buf[65536], *rad; struct sockaddr_storage from; socklen_t fromlen = sizeof(from); for (;;) { cnt = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from, &fromlen); if (cnt == -1) { err("radudpget: recv failed"); continue; } printf("radudpget: got %d bytes from %s\n", cnt, addr2string((struct sockaddr *)&from, fromlen)); if (cnt < 20) { printf("radudpget: packet too small\n"); continue; } len = RADLEN(buf); if (cnt < len) { printf("radudpget: packet smaller than length field in radius header\n"); continue; } if (cnt > len) printf("radudpget: packet was padded with %d bytes\n", cnt - len); f = (client ? (void *)find_client('U', (struct sockaddr *)&from, *client) : (void *)find_server('U', (struct sockaddr *)&from, *server)); if (!f) { printf("radudpget: got packet from wrong or unknown UDP peer, ignoring\n"); continue; } rad = malloc(len); if (rad) break; err("radudpget: malloc failed"); } memcpy(rad, buf, len); if (client) *client = (struct client *)f; /* only need this if *client == NULL, but if not NULL *client == f here */ else *server = (struct server *)f; /* only need this if *server == NULL, but if not NULL *server == f here */ if (sa) *sa = from; return rad; } int tlsverifycert(struct peer *peer) { int i, l, loc; X509 *cert; X509_NAME *nm; X509_NAME_ENTRY *e; unsigned char *v; unsigned long error; #if 1 if (SSL_get_verify_result(peer->ssl) != X509_V_OK) { printf("tlsverifycert: basic validation failed\n"); while ((error = ERR_get_error())) err("clientwr: TLS: %s", ERR_error_string(error, NULL)); return 0; } #endif cert = SSL_get_peer_certificate(peer->ssl); if (!cert) { printf("tlsverifycert: failed to obtain certificate\n"); return 0; } nm = X509_get_subject_name(cert); loc = -1; for (;;) { loc = X509_NAME_get_index_by_NID(nm, NID_commonName, loc); if (loc == -1) break; e = X509_NAME_get_entry(nm, loc); l = ASN1_STRING_to_UTF8(&v, X509_NAME_ENTRY_get_data(e)); if (l < 0) continue; printf("cn: "); for (i = 0; i < l; i++) printf("%c", v[i]); printf("\n"); if (l == strlen(peer->host) && !strncasecmp(peer->host, (char *)v, l)) { printf("tlsverifycert: Found cn matching host %s, All OK\n", peer->host); return 1; } printf("tlsverifycert: cn not matching host %s\n", peer->host); } X509_free(cert); return 0; } void tlsconnect(struct server *server, struct timeval *when, char *text) { struct timeval now; time_t elapsed; printf("tlsconnect called from %s\n", text); pthread_mutex_lock(&server->lock); if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) { /* already reconnected, nothing to do */ printf("tlsconnect(%s): seems already reconnected\n", text); pthread_mutex_unlock(&server->lock); return; } printf("tlsconnect %s\n", text); for (;;) { gettimeofday(&now, NULL); elapsed = now.tv_sec - server->lastconnecttry.tv_sec; if (server->connectionok) { server->connectionok = 0; sleep(10); } else if (elapsed < 5) sleep(10); else if (elapsed < 600) { printf("tlsconnect: sleeping %lds\n", elapsed); sleep(elapsed); } else if (elapsed < 1000) { printf("tlsconnect: sleeping %ds\n", 900); sleep(900); } else server->lastconnecttry.tv_sec = now.tv_sec; /* no sleep at startup */ printf("tlsconnect: trying to open TLS connection to %s port %s\n", server->peer.host, server->peer.port); if (server->sock >= 0) close(server->sock); if ((server->sock = connecttoserver(server->peer.addrinfo)) < 0) continue; SSL_free(server->peer.ssl); server->peer.ssl = SSL_new(ssl_ctx); SSL_set_fd(server->peer.ssl, server->sock); if (SSL_connect(server->peer.ssl) > 0 && tlsverifycert(&server->peer)) break; } printf("tlsconnect: TLS connection to %s port %s up\n", server->peer.host, server->peer.port); gettimeofday(&server->lastconnecttry, NULL); pthread_mutex_unlock(&server->lock); } unsigned char *radtlsget(SSL *ssl) { int cnt, total, len; unsigned char buf[4], *rad; for (;;) { for (total = 0; total < 4; total += cnt) { cnt = SSL_read(ssl, buf + total, 4 - total); if (cnt <= 0) { printf("radtlsget: connection lost\n"); if (SSL_get_error(ssl, cnt) == SSL_ERROR_ZERO_RETURN) { /* remote end sent close_notify, send one back */ SSL_shutdown(ssl); } return NULL; } } len = RADLEN(buf); rad = malloc(len); if (!rad) { err("radtlsget: malloc failed"); continue; } memcpy(rad, buf, 4); for (; total < len; total += cnt) { cnt = SSL_read(ssl, rad + total, len - total); if (cnt <= 0) { printf("radtlsget: connection lost\n"); if (SSL_get_error(ssl, cnt) == SSL_ERROR_ZERO_RETURN) { /* remote end sent close_notify, send one back */ SSL_shutdown(ssl); } free(rad); return NULL; } } if (total >= 20) break; free(rad); printf("radtlsget: packet smaller than minimum radius size\n"); } printf("radtlsget: got %d bytes\n", total); return rad; } int clientradput(struct server *server, unsigned char *rad) { int cnt; size_t len; unsigned long error; struct timeval lastconnecttry; len = RADLEN(rad); if (server->peer.type == 'U') { if (send(server->sock, rad, len, 0) >= 0) { printf("clienradput: sent UDP of length %d to %s port %s\n", len, server->peer.host, server->peer.port); return 1; } err("clientradput: send failed"); return 0; } lastconnecttry = server->lastconnecttry; while ((cnt = SSL_write(server->peer.ssl, rad, len)) <= 0) { while ((error = ERR_get_error())) err("clientwr: TLS: %s", ERR_error_string(error, NULL)); tlsconnect(server, &lastconnecttry, "clientradput"); lastconnecttry = server->lastconnecttry; } server->connectionok = 1; printf("clientradput: Sent %d bytes, Radius packet of length %d to TLS peer %s\n", cnt, len, server->peer.host); return 1; } int radsign(unsigned char *rad, unsigned char *sec) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static EVP_MD_CTX mdctx; unsigned int md_len; int result; pthread_mutex_lock(&lock); if (first) { EVP_MD_CTX_init(&mdctx); first = 0; } result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) && EVP_DigestUpdate(&mdctx, rad, RADLEN(rad)) && EVP_DigestUpdate(&mdctx, sec, strlen((char *)sec)) && EVP_DigestFinal_ex(&mdctx, rad + 4, &md_len) && md_len == 16); pthread_mutex_unlock(&lock); return result; } int validauth(unsigned char *rad, unsigned char *reqauth, unsigned char *sec) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static EVP_MD_CTX mdctx; unsigned char hash[EVP_MAX_MD_SIZE]; unsigned int len; int result; pthread_mutex_lock(&lock); if (first) { EVP_MD_CTX_init(&mdctx); first = 0; } len = RADLEN(rad); result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) && EVP_DigestUpdate(&mdctx, rad, 4) && EVP_DigestUpdate(&mdctx, reqauth, 16) && (len <= 20 || EVP_DigestUpdate(&mdctx, rad + 20, len - 20)) && EVP_DigestUpdate(&mdctx, sec, strlen((char *)sec)) && EVP_DigestFinal_ex(&mdctx, hash, &len) && len == 16 && !memcmp(hash, rad + 4, 16)); pthread_mutex_unlock(&lock); return result; } int checkmessageauth(unsigned char *rad, uint8_t *authattr, char *secret) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static HMAC_CTX hmacctx; unsigned int md_len; uint8_t auth[16], hash[EVP_MAX_MD_SIZE]; pthread_mutex_lock(&lock); if (first) { HMAC_CTX_init(&hmacctx); first = 0; } memcpy(auth, authattr, 16); memset(authattr, 0, 16); md_len = 0; HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL); HMAC_Update(&hmacctx, rad, RADLEN(rad)); HMAC_Final(&hmacctx, hash, &md_len); memcpy(authattr, auth, 16); if (md_len != 16) { printf("message auth computation failed\n"); pthread_mutex_unlock(&lock); return 0; } if (memcmp(auth, hash, 16)) { printf("message authenticator, wrong value\n"); pthread_mutex_unlock(&lock); return 0; } pthread_mutex_unlock(&lock); return 1; } int createmessageauth(unsigned char *rad, unsigned char *authattrval, char *secret) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static HMAC_CTX hmacctx; unsigned int md_len; if (!authattrval) return 1; pthread_mutex_lock(&lock); if (first) { HMAC_CTX_init(&hmacctx); first = 0; } memset(authattrval, 0, 16); md_len = 0; HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL); HMAC_Update(&hmacctx, rad, RADLEN(rad)); HMAC_Final(&hmacctx, authattrval, &md_len); if (md_len != 16) { printf("message auth computation failed\n"); pthread_mutex_unlock(&lock); return 0; } pthread_mutex_unlock(&lock); return 1; } void sendrq(struct server *to, struct client *from, struct request *rq) { int i; pthread_mutex_lock(&to->newrq_mutex); /* might simplify if only try nextid, might be ok */ for (i = to->nextid; i < MAX_REQUESTS; i++) if (!to->requests[i].buf) break; if (i == MAX_REQUESTS) { for (i = 0; i < to->nextid; i++) if (!to->requests[i].buf) break; if (i == to->nextid) { printf("No room in queue, dropping request\n"); pthread_mutex_unlock(&to->newrq_mutex); return; } } to->nextid = i + 1; rq->buf[1] = (char)i; printf("sendrq: inserting packet with id %d in queue for %s\n", i, to->peer.host); if (!createmessageauth(rq->buf, rq->messageauthattrval, to->peer.secret)) return; to->requests[i] = *rq; if (!to->newrq) { to->newrq = 1; printf("signalling client writer\n"); pthread_cond_signal(&to->newrq_cond); } pthread_mutex_unlock(&to->newrq_mutex); } void sendreply(struct client *to, struct server *from, unsigned char *buf, struct sockaddr_storage *tosa) { struct replyq *replyq = to->replyq; pthread_mutex_lock(&replyq->count_mutex); if (replyq->count == replyq->size) { printf("No room in queue, dropping request\n"); pthread_mutex_unlock(&replyq->count_mutex); return; } replyq->replies[replyq->count].buf = buf; if (tosa) replyq->replies[replyq->count].tosa = *tosa; replyq->count++; if (replyq->count == 1) { printf("signalling client writer\n"); pthread_cond_signal(&replyq->count_cond); } pthread_mutex_unlock(&replyq->count_mutex); } int pwdencrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static EVP_MD_CTX mdctx; unsigned char hash[EVP_MAX_MD_SIZE], *input; unsigned int md_len; uint8_t i, offset = 0, out[128]; pthread_mutex_lock(&lock); if (first) { EVP_MD_CTX_init(&mdctx); first = 0; } input = auth; for (;;) { if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) || !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) || !EVP_DigestUpdate(&mdctx, input, 16) || !EVP_DigestFinal_ex(&mdctx, hash, &md_len) || md_len != 16) { pthread_mutex_unlock(&lock); return 0; } for (i = 0; i < 16; i++) out[offset + i] = hash[i] ^ in[offset + i]; input = out + offset - 16; offset += 16; if (offset == len) break; } memcpy(in, out, len); pthread_mutex_unlock(&lock); return 1; } int pwddecrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static EVP_MD_CTX mdctx; unsigned char hash[EVP_MAX_MD_SIZE], *input; unsigned int md_len; uint8_t i, offset = 0, out[128]; pthread_mutex_lock(&lock); if (first) { EVP_MD_CTX_init(&mdctx); first = 0; } input = auth; for (;;) { if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) || !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) || !EVP_DigestUpdate(&mdctx, input, 16) || !EVP_DigestFinal_ex(&mdctx, hash, &md_len) || md_len != 16) { pthread_mutex_unlock(&lock); return 0; } for (i = 0; i < 16; i++) out[offset + i] = hash[i] ^ in[offset + i]; input = in + offset; offset += 16; if (offset == len) break; } memcpy(in, out, len); pthread_mutex_unlock(&lock); return 1; } int msmppencrypt(uint8_t *text, uint8_t len, uint8_t *shared, uint8_t sharedlen, uint8_t *auth, uint8_t *salt) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static EVP_MD_CTX mdctx; unsigned char hash[EVP_MAX_MD_SIZE]; unsigned int md_len; uint8_t i, offset; pthread_mutex_lock(&lock); if (first) { EVP_MD_CTX_init(&mdctx); first = 0; } #if 0 printf("msppencrypt auth in: "); for (i = 0; i < 16; i++) printf("%02x ", auth[i]); printf("\n"); printf("msppencrypt salt in: "); for (i = 0; i < 2; i++) printf("%02x ", salt[i]); printf("\n"); printf("msppencrypt in: "); for (i = 0; i < len; i++) printf("%02x ", text[i]); printf("\n"); #endif if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) || !EVP_DigestUpdate(&mdctx, shared, sharedlen) || !EVP_DigestUpdate(&mdctx, auth, 16) || !EVP_DigestUpdate(&mdctx, salt, 2) || !EVP_DigestFinal_ex(&mdctx, hash, &md_len)) { pthread_mutex_unlock(&lock); return 0; } #if 0 printf("msppencrypt hash: "); for (i = 0; i < 16; i++) printf("%02x ", hash[i]); printf("\n"); #endif for (i = 0; i < 16; i++) text[i] ^= hash[i]; for (offset = 16; offset < len; offset += 16) { #if 0 printf("text + offset - 16 c(%d): ", offset / 16); for (i = 0; i < 16; i++) printf("%02x ", (text + offset - 16)[i]); printf("\n"); #endif if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) || !EVP_DigestUpdate(&mdctx, shared, sharedlen) || !EVP_DigestUpdate(&mdctx, text + offset - 16, 16) || !EVP_DigestFinal_ex(&mdctx, hash, &md_len) || md_len != 16) { pthread_mutex_unlock(&lock); return 0; } #if 0 printf("msppencrypt hash: "); for (i = 0; i < 16; i++) printf("%02x ", hash[i]); printf("\n"); #endif for (i = 0; i < 16; i++) text[offset + i] ^= hash[i]; } #if 0 printf("msppencrypt out: "); for (i = 0; i < len; i++) printf("%02x ", text[i]); printf("\n"); #endif pthread_mutex_unlock(&lock); return 1; } int msmppdecrypt(uint8_t *text, uint8_t len, uint8_t *shared, uint8_t sharedlen, uint8_t *auth, uint8_t *salt) { static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; static unsigned char first = 1; static EVP_MD_CTX mdctx; unsigned char hash[EVP_MAX_MD_SIZE]; unsigned int md_len; uint8_t i, offset; char plain[255]; pthread_mutex_lock(&lock); if (first) { EVP_MD_CTX_init(&mdctx); first = 0; } #if 0 printf("msppdecrypt auth in: "); for (i = 0; i < 16; i++) printf("%02x ", auth[i]); printf("\n"); printf("msppedecrypt salt in: "); for (i = 0; i < 2; i++) printf("%02x ", salt[i]); printf("\n"); printf("msppedecrypt in: "); for (i = 0; i < len; i++) printf("%02x ", text[i]); printf("\n"); #endif if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) || !EVP_DigestUpdate(&mdctx, shared, sharedlen) || !EVP_DigestUpdate(&mdctx, auth, 16) || !EVP_DigestUpdate(&mdctx, salt, 2) || !EVP_DigestFinal_ex(&mdctx, hash, &md_len)) { pthread_mutex_unlock(&lock); return 0; } #if 0 printf("msppedecrypt hash: "); for (i = 0; i < 16; i++) printf("%02x ", hash[i]); printf("\n"); #endif for (i = 0; i < 16; i++) plain[i] = text[i] ^ hash[i]; for (offset = 16; offset < len; offset += 16) { #if 0 printf("text + offset - 16 c(%d): ", offset / 16); for (i = 0; i < 16; i++) printf("%02x ", (text + offset - 16)[i]); printf("\n"); #endif if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) || !EVP_DigestUpdate(&mdctx, shared, sharedlen) || !EVP_DigestUpdate(&mdctx, text + offset - 16, 16) || !EVP_DigestFinal_ex(&mdctx, hash, &md_len) || md_len != 16) { pthread_mutex_unlock(&lock); return 0; } #if 0 printf("msppedecrypt hash: "); for (i = 0; i < 16; i++) printf("%02x ", hash[i]); printf("\n"); #endif for (i = 0; i < 16; i++) plain[offset + i] = text[offset + i] ^ hash[i]; } memcpy(text, plain, len); #if 0 printf("msppedecrypt out: "); for (i = 0; i < len; i++) printf("%02x ", text[i]); printf("\n"); #endif pthread_mutex_unlock(&lock); return 1; } struct server *id2server(char *id, uint8_t len) { int i; char **realm, *idrealm; idrealm = strchr(id, '@'); if (idrealm) { idrealm++; len -= idrealm - id; } else { idrealm = "-"; len = 1; } for (i = 0; i < server_count; i++) { for (realm = servers[i].realms; *realm; realm++) { if ((strlen(*realm) == 1 && **realm == '*') || (strlen(*realm) == len && !memcmp(idrealm, *realm, len))) { printf("found matching realm: %s, host %s\n", *realm, servers[i].peer.host); return servers + i; } } } return NULL; } int rqinqueue(struct server *to, struct client *from, uint8_t id) { int i; pthread_mutex_lock(&to->newrq_mutex); for (i = 0; i < MAX_REQUESTS; i++) if (to->requests[i].buf && to->requests[i].origid == id && to->requests[i].from == from) break; pthread_mutex_unlock(&to->newrq_mutex); return i < MAX_REQUESTS; } struct server *radsrv(struct request *rq, unsigned char *buf, struct client *from) { uint8_t code, id, *auth, *attr, attrvallen; uint8_t *usernameattr = NULL, *userpwdattr = NULL, *tunnelpwdattr = NULL, *messageauthattr = NULL; int i; uint16_t len; int left; struct server *to; unsigned char newauth[16]; code = *(uint8_t *)buf; id = *(uint8_t *)(buf + 1); len = RADLEN(buf); auth = (uint8_t *)(buf + 4); printf("radsrv: code %d, id %d, length %d\n", code, id, len); if (code != RAD_Access_Request) { printf("radsrv: server currently accepts only access-requests, ignoring\n"); return NULL; } left = len - 20; attr = buf + 20; while (left > 1) { left -= attr[RAD_Attr_Length]; if (left < 0) { printf("radsrv: attribute length exceeds packet length, ignoring packet\n"); return NULL; } switch (attr[RAD_Attr_Type]) { case RAD_Attr_User_Name: usernameattr = attr; break; case RAD_Attr_User_Password: userpwdattr = attr; break; case RAD_Attr_Tunnel_Password: tunnelpwdattr = attr; break; case RAD_Attr_Message_Authenticator: messageauthattr = attr; break; } attr += attr[RAD_Attr_Length]; } if (left) printf("radsrv: malformed packet? remaining byte after last attribute\n"); if (usernameattr) { printf("radsrv: Username: "); for (i = 0; i < usernameattr[RAD_Attr_Length] - 2; i++) printf("%c", usernameattr[RAD_Attr_Value + i]); printf("\n"); } to = id2server((char *)&usernameattr[RAD_Attr_Value], usernameattr[RAD_Attr_Length] - 2); if (!to) { printf("radsrv: ignoring request, don't know where to send it\n"); return NULL; } if (rqinqueue(to, from, id)) { printf("radsrv: ignoring request from host %s with id %d, already got one\n", from->peer.host, id); return NULL; } if (messageauthattr && (messageauthattr[RAD_Attr_Length] != 18 || !checkmessageauth(buf, &messageauthattr[RAD_Attr_Value], from->peer.secret))) { printf("radsrv: message authentication failed\n"); return NULL; } if (!RAND_bytes(newauth, 16)) { printf("radsrv: failed to generate random auth\n"); return NULL; } printauth("auth", auth); printauth("newauth", newauth); if (userpwdattr) { printf("radsrv: found userpwdattr of length %d\n", userpwdattr[RAD_Attr_Length]); attrvallen = userpwdattr[RAD_Attr_Length] - 2; if (attrvallen < 16 || attrvallen > 128 || attrvallen % 16) { printf("radsrv: invalid user password length\n"); return NULL; } if (!pwddecrypt(&userpwdattr[RAD_Attr_Value], attrvallen, from->peer.secret, strlen(from->peer.secret), auth)) { printf("radsrv: cannot decrypt password\n"); return NULL; } printf("radsrv: password: "); for (i = 0; i < attrvallen; i++) printf("%02x ", userpwdattr[RAD_Attr_Value + i]); printf("\n"); if (!pwdencrypt(&userpwdattr[RAD_Attr_Value], attrvallen, to->peer.secret, strlen(to->peer.secret), newauth)) { printf("radsrv: cannot encrypt password\n"); return NULL; } } if (tunnelpwdattr) { printf("radsrv: found tunnelpwdattr of length %d\n", tunnelpwdattr[RAD_Attr_Length]); attrvallen = tunnelpwdattr[RAD_Attr_Length] - 2; if (attrvallen < 16 || attrvallen > 128 || attrvallen % 16) { printf("radsrv: invalid user password length\n"); return NULL; } if (!pwddecrypt(&tunnelpwdattr[RAD_Attr_Value], attrvallen, from->peer.secret, strlen(from->peer.secret), auth)) { printf("radsrv: cannot decrypt password\n"); return NULL; } printf("radsrv: password: "); for (i = 0; i < attrvallen; i++) printf("%02x ", tunnelpwdattr[RAD_Attr_Value + i]); printf("\n"); if (!pwdencrypt(&tunnelpwdattr[RAD_Attr_Value], attrvallen, to->peer.secret, strlen(to->peer.secret), newauth)) { printf("radsrv: cannot encrypt password\n"); return NULL; } } rq->buf = buf; rq->from = from; rq->origid = id; rq->messageauthattrval = (messageauthattr ? &messageauthattr[RAD_Attr_Value] : NULL); memcpy(rq->origauth, auth, 16); memcpy(auth, newauth, 16); printauth("rq->origauth", (unsigned char *)rq->origauth); printauth("auth", auth); return to; } void *clientrd(void *arg) { struct server *server = (struct server *)arg; struct client *from; int i, left, subleft; unsigned char *buf, *messageauthattr, *subattr, *attr; struct sockaddr_storage fromsa; struct timeval lastconnecttry; char tmp[255]; for (;;) { getnext: lastconnecttry = server->lastconnecttry; buf = (server->peer.type == 'U' ? radudpget(server->sock, NULL, &server, NULL) : radtlsget(server->peer.ssl)); if (!buf && server->peer.type == 'T') { tlsconnect(server, &lastconnecttry, "clientrd"); continue; } server->connectionok = 1; if (*buf != RAD_Access_Accept && *buf != RAD_Access_Reject && *buf != RAD_Access_Challenge) { printf("clientrd: discarding, only accept access accept, access reject and access challenge messages\n"); continue; } printf("got message type: %d, id: %d\n", buf[0], buf[1]); i = buf[1]; /* i is the id */ pthread_mutex_lock(&server->newrq_mutex); if (!server->requests[i].buf || !server->requests[i].tries) { pthread_mutex_unlock(&server->newrq_mutex); printf("clientrd: no matching request sent with this id, ignoring\n"); continue; } if (server->requests[i].received) { pthread_mutex_unlock(&server->newrq_mutex); printf("clientrd: already received, ignoring\n"); continue; } if (!validauth(buf, server->requests[i].buf + 4, (unsigned char *)server->peer.secret)) { pthread_mutex_unlock(&server->newrq_mutex); printf("clientrd: invalid auth, ignoring\n"); continue; } from = server->requests[i].from; /* messageauthattr present? */ messageauthattr = NULL; left = RADLEN(buf) - 20; attr = buf + 20; while (left > 1) { left -= attr[RAD_Attr_Length]; if (left < 0) { printf("clientrd: attribute length exceeds packet length, ignoring packet\n"); goto getnext; } if (attr[RAD_Attr_Type] == RAD_Attr_Message_Authenticator) { if (attr[RAD_Attr_Length] != 18) { printf("clientrd: illegal message auth attribute length, ignoring packet\n"); goto getnext; } memcpy(tmp, buf + 4, 16); memcpy(buf + 4, server->requests[i].buf + 4, 16); if (!checkmessageauth(buf, &attr[RAD_Attr_Value], server->peer.secret)) { printf("clientrd: message authentication failed\n"); goto getnext; } memcpy(buf + 4, tmp, 16); printf("clientrd: message auth ok\n"); messageauthattr = attr; break; } attr += attr[RAD_Attr_Length]; } /* handle MS MPPE */ left = RADLEN(buf) - 20; attr = buf + 20; while (left > 1) { left -= attr[RAD_Attr_Length]; if (left < 0) { printf("clientrd: attribute length exceeds packet length, ignoring packet\n"); goto getnext; } if (attr[RAD_Attr_Type] == RAD_Attr_Vendor_Specific && ((uint16_t *)attr)[1] == 0 && ntohs(((uint16_t *)attr)[2]) == 311) { /* 311 == MS */ subleft = attr[RAD_Attr_Length] - 6; subattr = attr + 6; while (subleft > 1) { subleft -= subattr[RAD_Attr_Length]; if (subleft < 0) break; if (subattr[RAD_Attr_Type] != RAD_VS_ATTR_MS_MPPE_Send_Key && subattr[RAD_Attr_Type] != RAD_VS_ATTR_MS_MPPE_Recv_Key) continue; printf("clientrd: Got MS MPPE\n"); if (subattr[RAD_Attr_Length] < 20) continue; if (!msmppdecrypt(subattr + 4, subattr[RAD_Attr_Length] - 4, (unsigned char *)server->peer.secret, strlen(server->peer.secret), server->requests[i].buf + 4, subattr + 2)) { printf("clientrd: failed to decrypt msppe key\n"); continue; } if (!msmppencrypt(subattr + 4, subattr[RAD_Attr_Length] - 4, (unsigned char *)from->peer.secret, strlen(from->peer.secret), (unsigned char *)server->requests[i].origauth, subattr + 2)) { printf("clientrd: failed to encrypt msppe key\n"); continue; } } if (subleft < 0) { printf("clientrd: bad vendor specific attr or subattr length, ignoring packet\n"); goto getnext; } } attr += attr[RAD_Attr_Length]; } /* once we set received = 1, requests[i] may be reused */ buf[1] = (char)server->requests[i].origid; memcpy(buf + 4, server->requests[i].origauth, 16); printauth("origauth/buf+4", buf + 4); if (messageauthattr) { if (!createmessageauth(buf, &messageauthattr[RAD_Attr_Value], from->peer.secret)) continue; printf("clientrd: computed messageauthattr\n"); } if (from->peer.type == 'U') fromsa = server->requests[i].fromsa; server->requests[i].received = 1; pthread_mutex_unlock(&server->newrq_mutex); if (!radsign(buf, (unsigned char *)from->peer.secret)) { printf("clientrd: failed to sign message\n"); continue; } printauth("signedorigauth/buf+4", buf + 4); printf("clientrd: giving packet back to where it came from\n"); sendreply(from, server, buf, from->peer.type == 'U' ? &fromsa : NULL); } } void *clientwr(void *arg) { struct server *server = (struct server *)arg; struct request *rq; pthread_t clientrdth; int i; struct timeval now; struct timespec timeout; memset(&timeout, 0, sizeof(struct timespec)); if (server->peer.type == 'U') { if ((server->sock = connecttoserver(server->peer.addrinfo)) < 0) { printf("clientwr: connecttoserver failed\n"); exit(1); } } else tlsconnect(server, NULL, "new client"); if (pthread_create(&clientrdth, NULL, clientrd, (void *)server)) errx("clientwr: pthread_create failed"); for (;;) { pthread_mutex_lock(&server->newrq_mutex); if (!server->newrq) { if (timeout.tv_nsec) { printf("clientwr: waiting up to %ld secs for new request\n", timeout.tv_nsec); pthread_cond_timedwait(&server->newrq_cond, &server->newrq_mutex, &timeout); timeout.tv_nsec = 0; } else { printf("clientwr: waiting for new request\n"); pthread_cond_wait(&server->newrq_cond, &server->newrq_mutex); } if (server->newrq) { printf("clientwr: got new request\n"); server->newrq = 0; } } pthread_mutex_unlock(&server->newrq_mutex); for (i = 0; i < MAX_REQUESTS; i++) { pthread_mutex_lock(&server->newrq_mutex); while (!server->requests[i].buf && i < MAX_REQUESTS) i++; if (i == MAX_REQUESTS) { pthread_mutex_unlock(&server->newrq_mutex); break; } rq = server->requests + i; if (rq->received) { printf("clientwr: removing received packet from queue\n"); free(rq->buf); /* setting this to NULL means that it can be reused */ rq->buf = NULL; pthread_mutex_unlock(&server->newrq_mutex); continue; } gettimeofday(&now, NULL); if (now.tv_sec <= rq->expiry.tv_sec) { if (!timeout.tv_sec || rq->expiry.tv_sec < timeout.tv_sec) timeout.tv_sec = rq->expiry.tv_sec; pthread_mutex_unlock(&server->newrq_mutex); continue; } if (rq->tries == (server->peer.type == 'T' ? 1 : REQUEST_RETRIES)) { printf("clientwr: removing expired packet from queue\n"); free(rq->buf); /* setting this to NULL means that it can be reused */ rq->buf = NULL; pthread_mutex_unlock(&server->newrq_mutex); continue; } pthread_mutex_unlock(&server->newrq_mutex); rq->expiry.tv_sec = now.tv_sec + (server->peer.type == 'T' ? REQUEST_EXPIRY : REQUEST_EXPIRY / REQUEST_RETRIES); if (!timeout.tv_sec || rq->expiry.tv_sec < timeout.tv_sec) timeout.tv_sec = rq->expiry.tv_sec; rq->tries++; clientradput(server, server->requests[i].buf); usleep(200000); } } /* should do more work to maintain TLS connections, keepalives etc */ } void *udpserverwr(void *arg) { struct replyq *replyq = &udp_server_replyq; struct reply *reply = replyq->replies; pthread_mutex_lock(&replyq->count_mutex); for (;;) { while (!replyq->count) { printf("udp server writer, waiting for signal\n"); pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex); printf("udp server writer, got signal\n"); } pthread_mutex_unlock(&replyq->count_mutex); if (sendto(udp_server_sock, reply->buf, RADLEN(reply->buf), 0, (struct sockaddr *)&reply->tosa, SOCKADDR_SIZE(reply->tosa)) < 0) err("sendudp: send failed"); free(reply->buf); pthread_mutex_lock(&replyq->count_mutex); replyq->count--; memmove(replyq->replies, replyq->replies + 1, replyq->count * sizeof(struct reply)); } } void *udpserverrd(void *arg) { struct request rq; unsigned char *buf; struct server *to; struct client *fr; pthread_t udpserverwrth; if ((udp_server_sock = bindport(SOCK_DGRAM, options.udpserverport)) < 0) { printf("udpserverrd: socket/bind failed\n"); exit(1); } printf("udpserverrd: listening on UDP port %s\n", options.udpserverport); if (pthread_create(&udpserverwrth, NULL, udpserverwr, NULL)) errx("pthread_create failed"); for (;;) { fr = NULL; memset(&rq, 0, sizeof(struct request)); buf = radudpget(udp_server_sock, &fr, NULL, &rq.fromsa); to = radsrv(&rq, buf, fr); if (!to) { printf("udpserverrd: ignoring request, no place to send it\n"); continue; } sendrq(to, fr, &rq); } } void *tlsserverwr(void *arg) { int cnt; unsigned long error; struct client *client = (struct client *)arg; struct replyq *replyq; printf("tlsserverwr starting for %s\n", client->peer.host); replyq = client->replyq; pthread_mutex_lock(&replyq->count_mutex); for (;;) { while (!replyq->count) { if (client->peer.ssl) { printf("tls server writer, waiting for signal\n"); pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex); printf("tls server writer, got signal\n"); } if (!client->peer.ssl) { /* ssl might have changed while waiting */ pthread_mutex_unlock(&replyq->count_mutex); printf("tlsserverwr: exiting as requested\n"); pthread_exit(NULL); } } pthread_mutex_unlock(&replyq->count_mutex); cnt = SSL_write(client->peer.ssl, replyq->replies->buf, RADLEN(replyq->replies->buf)); if (cnt > 0) printf("tlsserverwr: Sent %d bytes, Radius packet of length %d\n", cnt, RADLEN(replyq->replies->buf)); else while ((error = ERR_get_error())) err("tlsserverwr: SSL: %s", ERR_error_string(error, NULL)); free(replyq->replies->buf); pthread_mutex_lock(&replyq->count_mutex); replyq->count--; memmove(replyq->replies, replyq->replies + 1, replyq->count * sizeof(struct reply)); } } void *tlsserverrd(void *arg) { struct request rq; char unsigned *buf; unsigned long error; struct server *to; int s; struct client *client = (struct client *)arg; pthread_t tlsserverwrth; SSL *ssl; printf("tlsserverrd starting for %s\n", client->peer.host); ssl = client->peer.ssl; if (SSL_accept(ssl) <= 0) { while ((error = ERR_get_error())) err("tlsserverrd: SSL: %s", ERR_error_string(error, NULL)); errx("accept failed, child exiting"); } if (tlsverifycert(&client->peer)) { if (pthread_create(&tlsserverwrth, NULL, tlsserverwr, (void *)client)) errx("pthread_create failed"); for (;;) { buf = radtlsget(client->peer.ssl); if (!buf) break; printf("tlsserverrd: got Radius message from %s\n", client->peer.host); memset(&rq, 0, sizeof(struct request)); to = radsrv(&rq, buf, client); if (!to) { printf("ignoring request, no place to send it\n"); continue; } sendrq(to, client, &rq); } printf("tlsserverrd: connection lost\n"); /* stop writer by setting peer.ssl to NULL and give signal in case waiting for data */ client->peer.ssl = NULL; pthread_mutex_lock(&client->replyq->count_mutex); pthread_cond_signal(&client->replyq->count_cond); pthread_mutex_unlock(&client->replyq->count_mutex); printf("tlsserverrd: waiting for writer to end\n"); pthread_join(tlsserverwrth, NULL); } s = SSL_get_fd(ssl); SSL_free(ssl); close(s); printf("tlsserverrd thread for %s exiting\n", client->peer.host); client->peer.ssl = NULL; pthread_exit(NULL); } int tlslistener() { pthread_t tlsserverth; int s, snew; struct sockaddr_storage from; size_t fromlen = sizeof(from); struct client *client; if ((s = bindport(SOCK_STREAM, DEFAULT_TLS_PORT)) < 0) { printf("tlslistener: socket/bind failed\n"); exit(1); } listen(s, 0); printf("listening for incoming TLS on port %s\n", DEFAULT_TLS_PORT); for (;;) { snew = accept(s, (struct sockaddr *)&from, &fromlen); if (snew < 0) errx("accept failed"); printf("incoming TLS connection from %s\n", addr2string((struct sockaddr *)&from, fromlen)); client = find_client('T', (struct sockaddr *)&from, NULL); if (!client) { printf("ignoring request, not a known TLS client\n"); shutdown(snew, SHUT_RDWR); close(snew); continue; } if (client->peer.ssl) { printf("Ignoring incoming connection, already have one from this client\n"); shutdown(snew, SHUT_RDWR); close(snew); continue; } client->peer.ssl = SSL_new(ssl_ctx); SSL_set_fd(client->peer.ssl, snew); if (pthread_create(&tlsserverth, NULL, tlsserverrd, (void *)client)) errx("pthread_create failed"); pthread_detach(tlsserverth); } return 0; } char *parsehostport(char *s, struct peer *peer) { char *p, *field; int ipv6 = 0; p = s; /* allow literal addresses and port, e.g. [2001:db8::1]:1812 */ if (*p == '[') { p++; field = p; for (; *p && *p != ']' && *p != ' ' && *p != '\t' && *p != '\n'; p++); if (*p != ']') { printf("no ] matching initial [\n"); exit(1); } ipv6 = 1; } else { field = p; for (; *p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n'; p++); } if (field == p) { printf("missing host/address\n"); exit(1); } peer->host = stringcopy(field, p - field); if (ipv6) { p++; if (*p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n') { printf("unexpected character after ]\n"); exit(1); } } if (*p == ':') { /* port number or service name is specified */; field = p++; for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++); if (field == p) { printf("syntax error, : but no following port\n"); exit(1); } peer->port = stringcopy(field, p - field); } else peer->port = stringcopy(peer->type == 'U' ? DEFAULT_UDP_PORT : DEFAULT_TLS_PORT, 0); return p; } /* * is default, else longest match ... ";" used for separator */ char *parserealmlist(char *s, struct server *server) { char *p; int i, n, l; for (p = s, n = 1; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++) if (*p == ';') n++; l = p - s; if (!l) { printf("realm list must be specified\n"); exit(1); } server->realmdata = stringcopy(s, l); server->realms = malloc((1+n) * sizeof(char *)); if (!server->realms) errx("malloc failed"); server->realms[0] = server->realmdata; for (n = 1, i = 0; i < l; i++) if (server->realmdata[i] == ';') { server->realmdata[i] = '\0'; server->realms[n++] = server->realmdata + i + 1; } server->realms[n] = NULL; return p; } FILE *openconfigfile(const char *filename) { FILE *f; char pathname[100], *base; f = fopen(filename, "r"); if (f) { printf("reading config file %s\n", filename); return f; } if (strlen(filename) + 1 <= sizeof(pathname)) { /* basename() might modify the string */ strcpy(pathname, filename); base = basename(pathname); f = fopen(base, "r"); } if (!f) err("could not read config file %s nor %s\n", filename, base); printf("reading config file %s\n", base); return f; } /* exactly one argument must be non-NULL */ void getconfig(const char *serverfile, const char *clientfile) { FILE *f; char line[1024]; char *p, *field, **r; struct client *client; struct server *server; struct peer *peer; int i, count, *ucount, *tcount; f = openconfigfile(serverfile ? serverfile : clientfile); if (serverfile) { ucount = &server_udp_count; tcount = &server_tls_count; } else { ucount = &client_udp_count; tcount = &client_tls_count; } while (fgets(line, 1024, f)) { for (p = line; *p == ' ' || *p == '\t'; p++); switch (*p) { case '#': case '\n': break; case 'T': (*tcount)++; break; case 'U': (*ucount)++; break; default: printf("type must be U or T, got %c\n", *p); exit(1); } } if (serverfile) { count = server_count = server_udp_count + server_tls_count; servers = calloc(count, sizeof(struct server)); if (!servers) errx("malloc failed"); } else { count = client_count = client_udp_count + client_tls_count; clients = calloc(count, sizeof(struct client)); if (!clients) errx("malloc failed"); } if (client_udp_count) { udp_server_replyq.replies = malloc(client_udp_count * MAX_REQUESTS * sizeof(struct reply)); if (!udp_server_replyq.replies) errx("malloc failed"); udp_server_replyq.size = client_udp_count * MAX_REQUESTS; udp_server_replyq.count = 0; pthread_mutex_init(&udp_server_replyq.count_mutex, NULL); pthread_cond_init(&udp_server_replyq.count_cond, NULL); } rewind(f); for (i = 0; i < count && fgets(line, 1024, f);) { if (serverfile) { server = &servers[i]; peer = &server->peer; } else { client = &clients[i]; peer = &client->peer; } for (p = line; *p == ' ' || *p == '\t'; p++); if (*p == '#' || *p == '\n') continue; peer->type = *p; /* we already know it must be U or T */ for (p++; *p == ' ' || *p == '\t'; p++); p = parsehostport(p, peer); for (; *p == ' ' || *p == '\t'; p++); if (serverfile) { p = parserealmlist(p, server); for (; *p == ' ' || *p == '\t'; p++); } field = p; for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++); if (field == p) { /* no secret set and end of line, line is complete if TLS */ if (peer->type == 'U') { printf("secret must be specified for UDP\n"); exit(1); } peer->secret = stringcopy(DEFAULT_TLS_SECRET, 0); } else { peer->secret = stringcopy(field, p - field); /* check that rest of line only white space */ for (; *p == ' ' || *p == '\t'; p++); if (*p && *p != '\n') { printf("max 4 fields per line, found a 5th\n"); exit(1); } } if ((serverfile && !resolvepeer(&server->peer)) || (clientfile && !resolvepeer(&client->peer))) { printf("failed to resolve host %s port %s, exiting\n", peer->host, peer->port); exit(1); } if (serverfile) { pthread_mutex_init(&server->lock, NULL); server->sock = -1; server->requests = calloc(MAX_REQUESTS, sizeof(struct request)); if (!server->requests) errx("malloc failed"); server->newrq = 0; pthread_mutex_init(&server->newrq_mutex, NULL); pthread_cond_init(&server->newrq_cond, NULL); } else { if (peer->type == 'U') client->replyq = &udp_server_replyq; else { client->replyq = malloc(sizeof(struct replyq)); if (!client->replyq) errx("malloc failed"); client->replyq->replies = calloc(MAX_REQUESTS, sizeof(struct reply)); if (!client->replyq->replies) errx("malloc failed"); client->replyq->size = MAX_REQUESTS; client->replyq->count = 0; pthread_mutex_init(&client->replyq->count_mutex, NULL); pthread_cond_init(&client->replyq->count_cond, NULL); } } printf("got type %c, host %s, port %s, secret %s\n", peer->type, peer->host, peer->port, peer->secret); if (serverfile) { printf(" with realms:"); for (r = server->realms; *r; r++) printf(" %s", *r); printf("\n"); } i++; } fclose(f); } void getmainconfig(const char *configfile) { FILE *f; char line[1024]; char *p, *opt, *endopt, *val, *endval; f = openconfigfile(configfile); memset(&options, 0, sizeof(options)); while (fgets(line, 1024, f)) { for (p = line; *p == ' ' || *p == '\t'; p++); if (!*p || *p == '#' || *p == '\n') continue; opt = p++; for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++); endopt = p - 1; for (; *p == ' ' || *p == '\t'; p++); if (!*p || *p == '\n') { endopt[1] = '\0'; printf("error in %s, option %s has no value\n", configfile, opt); exit(1); } val = p; for (; *p && *p != '\n'; p++) if (*p != ' ' && *p != '\t') endval = p; endopt[1] = '\0'; endval[1] = '\0'; printf("getmainconfig: %s = %s\n", opt, val); if (!strcasecmp(opt, "TLSCACertificateFile")) { options.tlscacertificatefile = stringcopy(val, 0); continue; } if (!strcasecmp(opt, "TLSCACertificatePath")) { options.tlscacertificatepath = stringcopy(val, 0); continue; } if (!strcasecmp(opt, "TLSCertificateFile")) { options.tlscertificatefile = stringcopy(val, 0); continue; } if (!strcasecmp(opt, "TLSCertificateKeyFile")) { options.tlscertificatekeyfile = stringcopy(val, 0); continue; } if (!strcasecmp(opt, "TLSCertificateKeyPassword")) { options.tlscertificatekeypassword = stringcopy(val, 0); continue; } if (!strcasecmp(opt, "UDPServerPort")) { options.udpserverport = stringcopy(val, 0); continue; } printf("error in %s, unknown option %s\n", configfile, opt); exit(1); } fclose(f); if (!options.udpserverport) options.udpserverport = stringcopy(DEFAULT_UDP_PORT, 0); } #if 0 void parseargs(int argc, char **argv) { int c; while ((c = getopt(argc, argv, "p:")) != -1) { switch (c) { case 'p': udp_server_port = optarg; break; default: goto usage; } } return; usage: printf("radsecproxy [ -p UDP-port ]\n"); exit(1); } #endif int main(int argc, char **argv) { pthread_t udpserverth; /* pthread_attr_t joinable; */ int i; /* parseargs(argc, argv); */ getmainconfig(CONFIG_MAIN); getconfig(CONFIG_SERVERS, NULL); getconfig(NULL, CONFIG_CLIENTS); /* pthread_attr_init(&joinable); */ /* pthread_attr_setdetachstate(&joinable, PTHREAD_CREATE_JOINABLE); */ if (client_udp_count) if (pthread_create(&udpserverth, NULL /*&joinable*/, udpserverrd, NULL)) errx("pthread_create failed"); if (client_tls_count || server_tls_count) ssl_ctx = ssl_init(); for (i = 0; i < server_count; i++) if (pthread_create(&servers[i].clientth, NULL, clientwr, (void *)&servers[i])) errx("pthread_create failed"); if (client_tls_count) return tlslistener(); /* just hang around doing nothing, anything to do here? */ for (;;) sleep(1000); }