embedaddon/lighttpd/src/network.c - view

File: [ELWIX - Embedded LightWeight unIX -] / embedaddon / lighttpd / src / network.c
Revision 1.1.1.3 (vendor branch): download - view: text, annotated - select for diffs - revision graph
Wed Nov 2 10:35:00 2016 UTC (7 years, 7 months ago) by misho
Branches: lighttpd, MAIN
CVS tags: v1_4_41p8, HEAD

lighttpd 1.4.41

#include "first.h" #include "network.h" #include "fdevent.h" #include "log.h" #include "connections.h" #include "plugin.h" #include "joblist.h" #include "configfile.h" #include "network_backends.h" #include "sys-mmap.h" #include "sys-socket.h" #include <sys/types.h> #include <sys/stat.h> #include <sys/time.h> #include <errno.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #include <stdlib.h> #include <assert.h> #ifdef USE_OPENSSL # include <openssl/ssl.h> # include <openssl/err.h> # include <openssl/rand.h> # ifndef OPENSSL_NO_DH # include <openssl/dh.h> # endif # include <openssl/bn.h> # if OPENSSL_VERSION_NUMBER >= 0x0090800fL # ifndef OPENSSL_NO_ECDH # include <openssl/ecdh.h> # endif # endif #endif #ifdef USE_OPENSSL static void ssl_info_callback(const SSL *ssl, int where, int ret) { UNUSED(ret); if (0 != (where & SSL_CB_HANDSHAKE_START)) { connection *con = SSL_get_app_data(ssl); ++con->renegotiations; } } #endif void network_accept_tcp_nagle_disable (const int fd) { static int noinherit_tcpnodelay = -1; int opt; if (!noinherit_tcpnodelay) /* TCP_NODELAY inherited from listen socket */ return; if (noinherit_tcpnodelay < 0) { socklen_t optlen = sizeof(opt); if (0 == getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen)) { noinherit_tcpnodelay = !opt; if (opt) /* TCP_NODELAY inherited from listen socket */ return; } } opt = 1; (void)setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)); } static handler_t network_server_handle_fdevent(server *srv, void *context, int revents) { server_socket *srv_socket = (server_socket *)context; connection *con; int loops = 0; UNUSED(context); if (0 == (revents & FDEVENT_IN)) { log_error_write(srv, __FILE__, __LINE__, "sdd", "strange event for server socket", srv_socket->fd, revents); return HANDLER_ERROR; } /* accept()s at most 100 connections directly * * we jump out after 100 to give the waiting connections a chance */ for (loops = 0; loops < 100 && NULL != (con = connection_accept(srv, srv_socket)); loops++) { connection_state_machine(srv, con); } return HANDLER_GO_ON; } #if defined USE_OPENSSL && ! defined OPENSSL_NO_TLSEXT static int network_ssl_servername_callback(SSL *ssl, int *al, server *srv) { const char *servername; connection *con = (connection *) SSL_get_app_data(ssl); UNUSED(al); buffer_copy_string(con->uri.scheme, "https"); if (NULL == (servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name))) { #if 0 /* this "error" just means the client didn't support it */ log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", "failed to get TLS server name"); #endif return SSL_TLSEXT_ERR_NOACK; } buffer_copy_string(con->tlsext_server_name, servername); buffer_to_lower(con->tlsext_server_name); /* Sometimes this is still set, confusing COMP_HTTP_HOST */ buffer_reset(con->uri.authority); config_cond_cache_reset(srv, con); config_setup_connection(srv, con); con->conditional_is_valid[COMP_SERVER_SOCKET] = 1; con->conditional_is_valid[COMP_HTTP_SCHEME] = 1; con->conditional_is_valid[COMP_HTTP_HOST] = 1; config_patch_connection(srv, con); if (NULL == con->conf.ssl_pemfile_x509 || NULL == con->conf.ssl_pemfile_pkey) { /* x509/pkey available <=> pemfile was set <=> pemfile got patched: so this should never happen, unless you nest $SERVER["socket"] */ log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:", "no certificate/private key for TLS server name", con->tlsext_server_name); return SSL_TLSEXT_ERR_ALERT_FATAL; } /* first set certificate! setting private key checks whether certificate matches it */ if (!SSL_use_certificate(ssl, con->conf.ssl_pemfile_x509)) { log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:", "failed to set certificate for TLS server name", con->tlsext_server_name, ERR_error_string(ERR_get_error(), NULL)); return SSL_TLSEXT_ERR_ALERT_FATAL; } if (!SSL_use_PrivateKey(ssl, con->conf.ssl_pemfile_pkey)) { log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:", "failed to set private key for TLS server name", con->tlsext_server_name, ERR_error_string(ERR_get_error(), NULL)); return SSL_TLSEXT_ERR_ALERT_FATAL; } if (con->conf.ssl_verifyclient) { if (NULL == con->conf.ssl_ca_file_cert_names) { log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:", "can't verify client without ssl.ca-file for TLS server name", con->tlsext_server_name, ERR_error_string(ERR_get_error(), NULL)); return SSL_TLSEXT_ERR_ALERT_FATAL; } SSL_set_client_CA_list(ssl, SSL_dup_CA_list(con->conf.ssl_ca_file_cert_names)); /* forcing verification here is really not that useful - a client could just connect without SNI */ SSL_set_verify( ssl, SSL_VERIFY_PEER | (con->conf.ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0), NULL ); SSL_set_verify_depth(ssl, con->conf.ssl_verifyclient_depth); } else { SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL); } return SSL_TLSEXT_ERR_OK; } #endif static int network_server_init(server *srv, buffer *host_token, specific_config *s) { int val; socklen_t addr_len; server_socket *srv_socket; unsigned int port = 0; const char *host; buffer *b; int err; #ifdef __WIN32 WORD wVersionRequested; WSADATA wsaData; wVersionRequested = MAKEWORD( 2, 2 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { /* Tell the user that we could not find a usable */ /* WinSock DLL. */ return -1; } #endif err = -1; srv_socket = calloc(1, sizeof(*srv_socket)); force_assert(NULL != srv_socket); srv_socket->addr.plain.sa_family = AF_INET; /* default */ srv_socket->fd = -1; srv_socket->fde_ndx = -1; srv_socket->srv_token = buffer_init(); buffer_copy_buffer(srv_socket->srv_token, host_token); b = buffer_init(); buffer_copy_buffer(b, host_token); host = b->ptr; if (host[0] == '/') { /* host is a unix-domain-socket */ #ifdef HAVE_SYS_UN_H srv_socket->addr.plain.sa_family = AF_UNIX; #else log_error_write(srv, __FILE__, __LINE__, "s", "ERROR: Unix Domain sockets are not supported."); goto error_free_socket; #endif } else { /* ipv4:port * [ipv6]:port */ size_t len = buffer_string_length(b); char *sp = NULL; if (0 == len) { log_error_write(srv, __FILE__, __LINE__, "s", "value of $SERVER[\"socket\"] must not be empty"); goto error_free_socket; } if ((b->ptr[0] == '[' && b->ptr[len-1] == ']') || NULL == (sp = strrchr(b->ptr, ':'))) { /* use server.port if set in config, or else default from config_set_defaults() */ port = srv->srvconf.port; sp = b->ptr + len; /* point to '\0' at end of string so end of IPv6 address can be found below */ } else { /* found ip:port separator at *sp; port doesn't end in ']', so *sp hopefully doesn't split an IPv6 address */ *sp = '\0'; port = strtol(sp+1, NULL, 10); } /* check for [ and ] */ if (b->ptr[0] == '[' && *(sp-1) == ']') { *(sp-1) = '\0'; host++; s->use_ipv6 = 1; } if (port == 0 || port > 65535) { log_error_write(srv, __FILE__, __LINE__, "sd", "port not set or out of range:", port); goto error_free_socket; } } if (*host == '\0') host = NULL; #ifdef HAVE_IPV6 if (s->use_ipv6) { srv_socket->addr.plain.sa_family = AF_INET6; } #endif switch(srv_socket->addr.plain.sa_family) { #ifdef HAVE_IPV6 case AF_INET6: memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in6)); srv_socket->addr.ipv6.sin6_family = AF_INET6; if (host == NULL) { srv_socket->addr.ipv6.sin6_addr = in6addr_any; log_error_write(srv, __FILE__, __LINE__, "s", "warning: please use server.use-ipv6 only for hostnames, not without server.bind / empty address; your config will break if the kernel default for IPV6_V6ONLY changes"); } else { struct addrinfo hints, *res; int r; memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; if (0 != (r = getaddrinfo(host, NULL, &hints, &res))) { hints.ai_family = AF_INET; if ( #ifdef EAI_ADDRFAMILY EAI_ADDRFAMILY == r && #endif 0 == getaddrinfo(host, NULL, &hints, &res)) { memcpy(&srv_socket->addr.ipv4, res->ai_addr, res->ai_addrlen); srv_socket->addr.ipv4.sin_family = AF_INET; srv_socket->addr.ipv4.sin_port = htons(port); addr_len = sizeof(struct sockaddr_in); /*assert(addr_len == res->ai_addrlen);*/ freeaddrinfo(res); break; } log_error_write(srv, __FILE__, __LINE__, "sssss", "getaddrinfo failed: ", gai_strerror(r), "'", host, "'"); goto error_free_socket; } memcpy(&(srv_socket->addr), res->ai_addr, res->ai_addrlen); freeaddrinfo(res); } srv_socket->addr.ipv6.sin6_port = htons(port); addr_len = sizeof(struct sockaddr_in6); break; #endif case AF_INET: memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in)); srv_socket->addr.ipv4.sin_family = AF_INET; if (host == NULL) { srv_socket->addr.ipv4.sin_addr.s_addr = htonl(INADDR_ANY); } else { struct hostent *he; if (NULL == (he = gethostbyname(host))) { log_error_write(srv, __FILE__, __LINE__, "sds", "gethostbyname failed: ", h_errno, host); goto error_free_socket; } if (he->h_addrtype != AF_INET) { log_error_write(srv, __FILE__, __LINE__, "sd", "addr-type != AF_INET: ", he->h_addrtype); goto error_free_socket; } if (he->h_length != sizeof(struct in_addr)) { log_error_write(srv, __FILE__, __LINE__, "sd", "addr-length != sizeof(in_addr): ", he->h_length); goto error_free_socket; } memcpy(&(srv_socket->addr.ipv4.sin_addr.s_addr), he->h_addr_list[0], he->h_length); } srv_socket->addr.ipv4.sin_port = htons(port); addr_len = sizeof(struct sockaddr_in); break; #ifdef HAVE_SYS_UN_H case AF_UNIX: memset(&srv_socket->addr, 0, sizeof(struct sockaddr_un)); srv_socket->addr.un.sun_family = AF_UNIX; { size_t hostlen = strlen(host) + 1; if (hostlen > sizeof(srv_socket->addr.un.sun_path)) { log_error_write(srv, __FILE__, __LINE__, "sS", "unix socket filename too long:", host); goto error_free_socket; } memcpy(srv_socket->addr.un.sun_path, host, hostlen); #if defined(SUN_LEN) addr_len = SUN_LEN(&srv_socket->addr.un); #else /* stevens says: */ addr_len = hostlen + sizeof(srv_socket->addr.un.sun_family); #endif } break; #endif default: goto error_free_socket; } if (srv->srvconf.preflight_check) { err = 0; goto error_free_socket; } if (srv->sockets_disabled) { /* lighttpd -1 (one-shot mode) */ #ifdef USE_OPENSSL if (s->ssl_enabled) srv_socket->ssl_ctx = s->ssl_ctx; #endif goto srv_sockets_append; } #ifdef HAVE_SYS_UN_H if (AF_UNIX == srv_socket->addr.plain.sa_family) { /* check if the socket exists and try to connect to it. */ force_assert(host); /*(static analysis hint)*/ if (-1 == (srv_socket->fd = socket(srv_socket->addr.plain.sa_family, SOCK_STREAM, 0))) { log_error_write(srv, __FILE__, __LINE__, "ss", "socket failed:", strerror(errno)); goto error_free_socket; } if (0 == connect(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) { log_error_write(srv, __FILE__, __LINE__, "ss", "server socket is still in use:", host); goto error_free_socket; } /* connect failed */ switch(errno) { case ECONNREFUSED: unlink(host); break; case ENOENT: break; default: log_error_write(srv, __FILE__, __LINE__, "sds", "testing socket failed:", host, strerror(errno)); goto error_free_socket; } } else #endif { if (-1 == (srv_socket->fd = socket(srv_socket->addr.plain.sa_family, SOCK_STREAM, IPPROTO_TCP))) { log_error_write(srv, __FILE__, __LINE__, "ss", "socket failed:", strerror(errno)); goto error_free_socket; } #ifdef HAVE_IPV6 if (AF_INET6 == srv_socket->addr.plain.sa_family && host != NULL) { if (s->set_v6only) { val = 1; if (-1 == setsockopt(srv_socket->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) { log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(IPV6_V6ONLY) failed:", strerror(errno)); goto error_free_socket; } } else { log_error_write(srv, __FILE__, __LINE__, "s", "warning: server.set-v6only will be removed soon, update your config to have different sockets for ipv4 and ipv6"); } } #endif } /* set FD_CLOEXEC now, fdevent_fcntl_set is called later; needed for pipe-logger forks */ fd_close_on_exec(srv_socket->fd); /* */ srv->cur_fds = srv_socket->fd; val = 1; if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) { log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(SO_REUSEADDR) failed:", strerror(errno)); goto error_free_socket; } if (srv_socket->addr.plain.sa_family != AF_UNIX) { val = 1; if (setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)) < 0) { log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(TCP_NODELAY) failed:", strerror(errno)); goto error_free_socket; } } if (0 != bind(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) { switch(srv_socket->addr.plain.sa_family) { case AF_UNIX: log_error_write(srv, __FILE__, __LINE__, "sds", "can't bind to socket:", host, strerror(errno)); break; default: log_error_write(srv, __FILE__, __LINE__, "ssds", "can't bind to port:", host, port, strerror(errno)); break; } goto error_free_socket; } if (-1 == listen(srv_socket->fd, s->listen_backlog)) { log_error_write(srv, __FILE__, __LINE__, "ss", "listen failed: ", strerror(errno)); goto error_free_socket; } if (s->ssl_enabled) { #ifdef USE_OPENSSL if (NULL == (srv_socket->ssl_ctx = s->ssl_ctx)) { log_error_write(srv, __FILE__, __LINE__, "s", "ssl.pemfile has to be set"); goto error_free_socket; } #else log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", "ssl requested but openssl support is not compiled in"); goto error_free_socket; #endif #ifdef TCP_DEFER_ACCEPT } else if (s->defer_accept) { int v = s->defer_accept; if (-1 == setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &v, sizeof(v))) { log_error_write(srv, __FILE__, __LINE__, "ss", "can't set TCP_DEFER_ACCEPT: ", strerror(errno)); } #endif #if defined(__FreeBSD__) || defined(__NetBSD__) \ || defined(__OpenBSD__) || defined(__DragonflyBSD__) } else if (!buffer_is_empty(s->bsd_accept_filter) && (buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("httpready")) || buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("dataready")))) { #ifdef SO_ACCEPTFILTER /* FreeBSD accf_http filter */ struct accept_filter_arg afa; memset(&afa, 0, sizeof(afa)); strncpy(afa.af_name, s->bsd_accept_filter->ptr, sizeof(afa.af_name)); if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)) < 0) { if (errno != ENOENT) { log_error_write(srv, __FILE__, __LINE__, "SBss", "can't set accept-filter '", s->bsd_accept_filter, "':", strerror(errno)); } } #endif #endif } srv_sockets_append: srv_socket->is_ssl = s->ssl_enabled; if (srv->srv_sockets.size == 0) { srv->srv_sockets.size = 4; srv->srv_sockets.used = 0; srv->srv_sockets.ptr = malloc(srv->srv_sockets.size * sizeof(server_socket*)); force_assert(NULL != srv->srv_sockets.ptr); } else if (srv->srv_sockets.used == srv->srv_sockets.size) { srv->srv_sockets.size += 4; srv->srv_sockets.ptr = realloc(srv->srv_sockets.ptr, srv->srv_sockets.size * sizeof(server_socket*)); force_assert(NULL != srv->srv_sockets.ptr); } srv->srv_sockets.ptr[srv->srv_sockets.used++] = srv_socket; buffer_free(b); return 0; error_free_socket: if (srv_socket->fd != -1) { /* check if server fd are already registered */ if (srv_socket->fde_ndx != -1) { fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd); fdevent_unregister(srv->ev, srv_socket->fd); } close(srv_socket->fd); } buffer_free(srv_socket->srv_token); free(srv_socket); buffer_free(b); return err; /* -1 if error; 0 if srv->srvconf.preflight_check successful */ } int network_close(server *srv) { size_t i; for (i = 0; i < srv->srv_sockets.used; i++) { server_socket *srv_socket = srv->srv_sockets.ptr[i]; if (srv_socket->fd != -1) { /* check if server fd are already registered */ if (srv_socket->fde_ndx != -1) { fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd); fdevent_unregister(srv->ev, srv_socket->fd); } close(srv_socket->fd); } buffer_free(srv_socket->srv_token); free(srv_socket); } free(srv->srv_sockets.ptr); return 0; } typedef enum { NETWORK_BACKEND_UNSET, NETWORK_BACKEND_WRITE, NETWORK_BACKEND_WRITEV, NETWORK_BACKEND_SENDFILE, } network_backend_t; #ifdef USE_OPENSSL static X509* x509_load_pem_file(server *srv, const char *file) { BIO *in; X509 *x = NULL; in = BIO_new(BIO_s_file()); if (NULL == in) { log_error_write(srv, __FILE__, __LINE__, "S", "SSL: BIO_new(BIO_s_file()) failed"); goto error; } if (BIO_read_filename(in,file) <= 0) { log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: BIO_read_filename('", file,"') failed"); goto error; } x = PEM_read_bio_X509(in, NULL, NULL, NULL); if (NULL == x) { log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: couldn't read X509 certificate from '", file,"'"); goto error; } BIO_free(in); return x; error: if (NULL != in) BIO_free(in); return NULL; } static EVP_PKEY* evp_pkey_load_pem_file(server *srv, const char *file) { BIO *in; EVP_PKEY *x = NULL; in=BIO_new(BIO_s_file()); if (NULL == in) { log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BIO_new(BIO_s_file()) failed"); goto error; } if (BIO_read_filename(in,file) <= 0) { log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: BIO_read_filename('", file,"') failed"); goto error; } x = PEM_read_bio_PrivateKey(in, NULL, NULL, NULL); if (NULL == x) { log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: couldn't read private key from '", file,"'"); goto error; } BIO_free(in); return x; error: if (NULL != in) BIO_free(in); return NULL; } static int network_openssl_load_pemfile(server *srv, size_t ndx) { specific_config *s = srv->config_storage[ndx]; #ifdef OPENSSL_NO_TLSEXT { data_config *dc = (data_config *)srv->config_context->data[ndx]; if ((ndx > 0 && (COMP_SERVER_SOCKET != dc->comp || dc->cond != CONFIG_COND_EQ)) || !s->ssl_enabled) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", "ssl.pemfile only works in SSL socket binding context as openssl version does not support TLS extensions"); return -1; } } #endif if (NULL == (s->ssl_pemfile_x509 = x509_load_pem_file(srv, s->ssl_pemfile->ptr))) return -1; if (NULL == (s->ssl_pemfile_pkey = evp_pkey_load_pem_file(srv, s->ssl_pemfile->ptr))) return -1; if (!X509_check_private_key(s->ssl_pemfile_x509, s->ssl_pemfile_pkey)) { log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:", "Private key does not match the certificate public key, reason:", ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile); return -1; } return 0; } #endif int network_init(server *srv) { buffer *b; size_t i, j; network_backend_t backend; #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef OPENSSL_NO_ECDH EC_KEY *ecdh; int nid; #endif #endif #ifdef USE_OPENSSL # ifndef OPENSSL_NO_DH DH *dh; # endif BIO *bio; /* 1024-bit MODP Group with 160-bit prime order subgroup (RFC5114) * -----BEGIN DH PARAMETERS----- * MIIBDAKBgQCxC4+WoIDgHd6S3l6uXVTsUsmfvPsGo8aaap3KUtI7YWBz4oZ1oj0Y * mDjvHi7mUsAT7LSuqQYRIySXXDzUm4O/rMvdfZDEvXCYSI6cIZpzck7/1vrlZEc4 * +qMaT/VbzMChUa9fDci0vUW/N982XBpl5oz9p21NpwjfH7K8LkpDcQKBgQCk0cvV * w/00EmdlpELvuZkF+BBN0lisUH/WQGz/FCZtMSZv6h5cQVZLd35pD1UE8hMWAhe0 * sBuIal6RVH+eJ0n01/vX07mpLuGQnQ0iY/gKdqaiTAh6CR9THb8KAWm2oorWYqTR * jnOvoy13nVkY0IvIhY9Nzvl8KiSFXm7rIrOy5QICAKA= * -----END DH PARAMETERS----- */ static const unsigned char dh1024_p[]={ 0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E, 0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6, 0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86, 0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0, 0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C, 0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70, 0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA, 0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0, 0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF, 0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08, 0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71, }; static const unsigned char dh1024_g[]={ 0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42, 0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F, 0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E, 0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13, 0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F, 0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1, 0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08, 0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A, 0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59, 0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24, 0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5, }; #endif struct nb_map { network_backend_t nb; const char *name; } network_backends[] = { /* lowest id wins */ #if defined USE_SENDFILE { NETWORK_BACKEND_SENDFILE, "sendfile" }, #endif #if defined USE_LINUX_SENDFILE { NETWORK_BACKEND_SENDFILE, "linux-sendfile" }, #endif #if defined USE_FREEBSD_SENDFILE { NETWORK_BACKEND_SENDFILE, "freebsd-sendfile" }, #endif #if defined USE_SOLARIS_SENDFILEV { NETWORK_BACKEND_SENDFILE, "solaris-sendfilev" }, #endif #if defined USE_WRITEV { NETWORK_BACKEND_WRITEV, "writev" }, #endif { NETWORK_BACKEND_WRITE, "write" }, { NETWORK_BACKEND_UNSET, NULL } }; #ifdef USE_OPENSSL /* load SSL certificates */ for (i = 0; i < srv->config_context->used; i++) { specific_config *s = srv->config_storage[i]; #ifndef SSL_OP_NO_COMPRESSION # define SSL_OP_NO_COMPRESSION 0 #endif #ifndef SSL_MODE_RELEASE_BUFFERS /* OpenSSL >= 1.0.0 */ #define SSL_MODE_RELEASE_BUFFERS 0 #endif long ssloptions = SSL_OP_ALL | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_NO_COMPRESSION; if (buffer_string_is_empty(s->ssl_pemfile) && buffer_string_is_empty(s->ssl_ca_file)) continue; if (srv->ssl_is_init == 0) { SSL_load_error_strings(); SSL_library_init(); OpenSSL_add_all_algorithms(); srv->ssl_is_init = 1; if (0 == RAND_status()) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", "not enough entropy in the pool"); return -1; } } if (!buffer_string_is_empty(s->ssl_pemfile)) { #ifdef OPENSSL_NO_TLSEXT data_config *dc = (data_config *)srv->config_context->data[i]; if (COMP_HTTP_HOST == dc->comp) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", "can't use ssl.pemfile with $HTTP[\"host\"], openssl version does not support TLS extensions"); return -1; } #endif if (network_openssl_load_pemfile(srv, i)) return -1; } if (!buffer_string_is_empty(s->ssl_ca_file)) { s->ssl_ca_file_cert_names = SSL_load_client_CA_file(s->ssl_ca_file->ptr); if (NULL == s->ssl_ca_file_cert_names) { log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:", ERR_error_string(ERR_get_error(), NULL), s->ssl_ca_file); } } if (buffer_string_is_empty(s->ssl_pemfile) || !s->ssl_enabled) continue; if (NULL == (s->ssl_ctx = SSL_CTX_new(SSLv23_server_method()))) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", ERR_error_string(ERR_get_error(), NULL)); return -1; } /* completely useless identifier; required for client cert verification to work with sessions */ if (0 == SSL_CTX_set_session_id_context(s->ssl_ctx, (const unsigned char*) CONST_STR_LEN("lighttpd"))) { log_error_write(srv, __FILE__, __LINE__, "ss:s", "SSL:", "failed to set session context", ERR_error_string(ERR_get_error(), NULL)); return -1; } if (s->ssl_empty_fragments) { #ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS ssloptions &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS; #else ssloptions &= ~0x00000800L; /* hardcode constant */ log_error_write(srv, __FILE__, __LINE__, "ss", "WARNING: SSL:", "'insert empty fragments' not supported by the openssl version used to compile lighttpd with"); #endif } SSL_CTX_set_options(s->ssl_ctx, ssloptions); SSL_CTX_set_info_callback(s->ssl_ctx, ssl_info_callback); if (!s->ssl_use_sslv2) { /* disable SSLv2 */ if ((SSL_OP_NO_SSLv2 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv2)) != SSL_OP_NO_SSLv2) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", ERR_error_string(ERR_get_error(), NULL)); return -1; } } if (!s->ssl_use_sslv3) { /* disable SSLv3 */ if ((SSL_OP_NO_SSLv3 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv3)) != SSL_OP_NO_SSLv3) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", ERR_error_string(ERR_get_error(), NULL)); return -1; } } if (!buffer_string_is_empty(s->ssl_cipher_list)) { /* Disable support for low encryption ciphers */ if (SSL_CTX_set_cipher_list(s->ssl_ctx, s->ssl_cipher_list->ptr) != 1) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", ERR_error_string(ERR_get_error(), NULL)); return -1; } if (s->ssl_honor_cipher_order) { SSL_CTX_set_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); } } #ifndef OPENSSL_NO_DH /* Support for Diffie-Hellman key exchange */ if (!buffer_string_is_empty(s->ssl_dh_file)) { /* DH parameters from file */ bio = BIO_new_file((char *) s->ssl_dh_file->ptr, "r"); if (bio == NULL) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to open file", s->ssl_dh_file->ptr); return -1; } dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); BIO_free(bio); if (dh == NULL) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: PEM_read_bio_DHparams failed", s->ssl_dh_file->ptr); return -1; } } else { BIGNUM *dh_p, *dh_g; /* Default DH parameters from RFC5114 */ dh = DH_new(); if (dh == NULL) { log_error_write(srv, __FILE__, __LINE__, "s", "SSL: DH_new () failed"); return -1; } dh_p = BN_bin2bn(dh1024_p,sizeof(dh1024_p), NULL); dh_g = BN_bin2bn(dh1024_g,sizeof(dh1024_g), NULL); if ((dh_p == NULL) || (dh_g == NULL)) { DH_free(dh); log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BN_bin2bn () failed"); return -1; } #if OPENSSL_VERSION_NUMBER < 0x10100000L \ || defined(LIBRESSL_VERSION_NUMBER) dh->p = dh_p; dh->g = dh_g; dh->length = 160; #else DH_set0_pqg(dh, dh_p, NULL, dh_g); DH_set_length(dh, 160); #endif } SSL_CTX_set_tmp_dh(s->ssl_ctx,dh); SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_DH_USE); DH_free(dh); #else if (!buffer_string_is_empty(s->ssl_dh_file)) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: openssl compiled without DH support, can't load parameters from", s->ssl_dh_file->ptr); } #endif #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef OPENSSL_NO_ECDH /* Support for Elliptic-Curve Diffie-Hellman key exchange */ if (!buffer_string_is_empty(s->ssl_ec_curve)) { /* OpenSSL only supports the "named curves" from RFC 4492, section 5.1.1. */ nid = OBJ_sn2nid((char *) s->ssl_ec_curve->ptr); if (nid == 0) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unknown curve name", s->ssl_ec_curve->ptr); return -1; } } else { /* Default curve */ nid = OBJ_sn2nid("prime256v1"); } ecdh = EC_KEY_new_by_curve_name(nid); if (ecdh == NULL) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to create curve", s->ssl_ec_curve->ptr); return -1; } SSL_CTX_set_tmp_ecdh(s->ssl_ctx,ecdh); SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_ECDH_USE); EC_KEY_free(ecdh); #endif #endif /* load all ssl.ca-files specified in the config into each SSL_CTX to be prepared for SNI */ for (j = 0; j < srv->config_context->used; j++) { specific_config *s1 = srv->config_storage[j]; if (!buffer_string_is_empty(s1->ssl_ca_file)) { if (1 != SSL_CTX_load_verify_locations(s->ssl_ctx, s1->ssl_ca_file->ptr, NULL)) { log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:", ERR_error_string(ERR_get_error(), NULL), s1->ssl_ca_file); return -1; } } } if (s->ssl_verifyclient) { if (NULL == s->ssl_ca_file_cert_names) { log_error_write(srv, __FILE__, __LINE__, "s", "SSL: You specified ssl.verifyclient.activate but no ca_file" ); return -1; } SSL_CTX_set_client_CA_list(s->ssl_ctx, SSL_dup_CA_list(s->ssl_ca_file_cert_names)); SSL_CTX_set_verify( s->ssl_ctx, SSL_VERIFY_PEER | (s->ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0), NULL ); SSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth); } if (1 != SSL_CTX_use_certificate(s->ssl_ctx, s->ssl_pemfile_x509)) { log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:", ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile); return -1; } if (1 != SSL_CTX_use_PrivateKey(s->ssl_ctx, s->ssl_pemfile_pkey)) { log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:", ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile); return -1; } if (SSL_CTX_check_private_key(s->ssl_ctx) != 1) { log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:", "Private key does not match the certificate public key, reason:", ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile); return -1; } SSL_CTX_set_default_read_ahead(s->ssl_ctx, 1); SSL_CTX_set_mode(s->ssl_ctx, SSL_CTX_get_mode(s->ssl_ctx) | SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_RELEASE_BUFFERS); # ifndef OPENSSL_NO_TLSEXT if (!SSL_CTX_set_tlsext_servername_callback(s->ssl_ctx, network_ssl_servername_callback) || !SSL_CTX_set_tlsext_servername_arg(s->ssl_ctx, srv)) { log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:", "failed to initialize TLS servername callback, openssl library does not support TLS servername extension"); return -1; } # endif } #endif b = buffer_init(); buffer_copy_buffer(b, srv->srvconf.bindhost); buffer_append_string_len(b, CONST_STR_LEN(":")); buffer_append_int(b, srv->srvconf.port); if (0 != network_server_init(srv, b, srv->config_storage[0])) { buffer_free(b); return -1; } buffer_free(b); #ifdef USE_OPENSSL srv->network_ssl_backend_write = network_write_chunkqueue_openssl; #endif /* get a usefull default */ backend = network_backends[0].nb; /* match name against known types */ if (!buffer_string_is_empty(srv->srvconf.network_backend)) { for (i = 0; network_backends[i].name; i++) { /**/ if (buffer_is_equal_string(srv->srvconf.network_backend, network_backends[i].name, strlen(network_backends[i].name))) { backend = network_backends[i].nb; break; } } if (NULL == network_backends[i].name) { /* we don't know it */ log_error_write(srv, __FILE__, __LINE__, "sb", "server.network-backend has a unknown value:", srv->srvconf.network_backend); return -1; } } switch(backend) { case NETWORK_BACKEND_WRITE: srv->network_backend_write = network_write_chunkqueue_write; break; #if defined(USE_WRITEV) case NETWORK_BACKEND_WRITEV: srv->network_backend_write = network_write_chunkqueue_writev; break; #endif #if defined(USE_SENDFILE) case NETWORK_BACKEND_SENDFILE: srv->network_backend_write = network_write_chunkqueue_sendfile; break; #endif default: return -1; } /* check for $SERVER["socket"] */ for (i = 1; i < srv->config_context->used; i++) { data_config *dc = (data_config *)srv->config_context->data[i]; specific_config *s = srv->config_storage[i]; /* not our stage */ if (COMP_SERVER_SOCKET != dc->comp) continue; if (dc->cond != CONFIG_COND_EQ) continue; /* check if we already know this socket, * if yes, don't init it */ for (j = 0; j < srv->srv_sockets.used; j++) { if (buffer_is_equal(srv->srv_sockets.ptr[j]->srv_token, dc->string)) { break; } } if (j == srv->srv_sockets.used) { if (0 != network_server_init(srv, dc->string, s)) return -1; } } return 0; } int network_register_fdevents(server *srv) { size_t i; if (-1 == fdevent_reset(srv->ev)) { return -1; } if (srv->sockets_disabled) return 0; /* lighttpd -1 (one-shot mode) */ /* register fdevents after reset */ for (i = 0; i < srv->srv_sockets.used; i++) { server_socket *srv_socket = srv->srv_sockets.ptr[i]; fdevent_register(srv->ev, srv_socket->fd, network_server_handle_fdevent, srv_socket); fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, FDEVENT_IN); } return 0; } int network_write_chunkqueue(server *srv, connection *con, chunkqueue *cq, off_t max_bytes) { int ret = -1; off_t written = 0; #ifdef TCP_CORK int corked = 0; #endif server_socket *srv_socket = con->srv_socket; if (con->conf.global_kbytes_per_second) { off_t limit = con->conf.global_kbytes_per_second * 1024 - *(con->conf.global_bytes_per_second_cnt_ptr); if (limit <= 0) { /* we reached the global traffic limit */ con->traffic_limit_reached = 1; return 1; } else { if (max_bytes > limit) max_bytes = limit; } } if (con->conf.kbytes_per_second) { off_t limit = con->conf.kbytes_per_second * 1024 - con->bytes_written_cur_second; if (limit <= 0) { /* we reached the traffic limit */ con->traffic_limit_reached = 1; return 1; } else { if (max_bytes > limit) max_bytes = limit; } } written = cq->bytes_out; #ifdef TCP_CORK /* Linux: put a cork into the socket as we want to combine the write() calls * but only if we really have multiple chunks */ if (cq->first && cq->first->next) { corked = 1; (void)setsockopt(con->fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked)); } #endif if (srv_socket->is_ssl) { #ifdef USE_OPENSSL ret = srv->network_ssl_backend_write(srv, con, con->ssl, cq, max_bytes); #endif } else { ret = srv->network_backend_write(srv, con, con->fd, cq, max_bytes); } if (ret >= 0) { chunkqueue_remove_finished_chunks(cq); ret = chunkqueue_is_empty(cq) ? 0 : 1; } #ifdef TCP_CORK if (corked) { corked = 0; (void)setsockopt(con->fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked)); } #endif written = cq->bytes_out - written; con->bytes_written += written; con->bytes_written_cur_second += written; *(con->conf.global_bytes_per_second_cnt_ptr) += written; return ret; }