lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include <errno.h>
#include <string.h>
#include <unistd.h>
#ifndef USE_OPENSSL_KERBEROS
#ifndef OPENSSL_NO_KRB5
#define OPENSSL_NO_KRB5
#endif
#endif
#include <openssl/ssl.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#if ! defined OPENSSL_NO_TLSEXT && ! defined SSL_CTRL_SET_TLSEXT_HOSTNAME
#define OPENSSL_NO_TLSEXT
#endif
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
#include <openssl/ecdh.h>
#endif
#endif
#include "base.h"
#include "log.h"
#include "plugin.h"
typedef struct {
SSL_CTX *ssl_ctx; /* not patched */
/* SNI per host: with COMP_SERVER_SOCKET, COMP_HTTP_SCHEME, COMP_HTTP_HOST */
EVP_PKEY *ssl_pemfile_pkey;
X509 *ssl_pemfile_x509;
STACK_OF(X509_NAME) *ssl_ca_file_cert_names;
unsigned short ssl_verifyclient;
unsigned short ssl_verifyclient_enforce;
unsigned short ssl_verifyclient_depth;
unsigned short ssl_verifyclient_export_cert;
buffer *ssl_verifyclient_username;
unsigned short ssl_disable_client_renegotiation;
unsigned short ssl_read_ahead;
unsigned short ssl_log_noise;
/*(used only during startup; not patched)*/
unsigned short ssl_enabled; /* only interesting for setting up listening sockets. don't use at runtime */
unsigned short ssl_honor_cipher_order; /* determine SSL cipher in server-preferred order, not client-order */
unsigned short ssl_empty_fragments; /* whether to not set SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS */
unsigned short ssl_use_sslv2;
unsigned short ssl_use_sslv3;
buffer *ssl_pemfile;
buffer *ssl_ca_file;
buffer *ssl_ca_crl_file;
buffer *ssl_ca_dn_file;
buffer *ssl_cipher_list;
buffer *ssl_dh_file;
buffer *ssl_ec_curve;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config **config_storage;
} plugin_data;
static int ssl_is_init;
/* need assigned p->id for deep access of module handler_ctx for connection
* i.e. handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; */
static plugin_data *plugin_data_singleton;
#define LOCAL_SEND_BUFSIZE (64 * 1024)
static char *local_send_buffer;
typedef struct {
SSL *ssl;
connection *con;
unsigned int renegotiations; /* count of SSL_CB_HANDSHAKE_START */
int request_env_patched;
plugin_config conf;
server *srv;
} handler_ctx;
static handler_ctx *
handler_ctx_init (void)
{
handler_ctx *hctx = calloc(1, sizeof(*hctx));
force_assert(hctx);
return hctx;
}
static void
handler_ctx_free (handler_ctx *hctx)
{
if (hctx->ssl) SSL_free(hctx->ssl);
free(hctx);
}
INIT_FUNC(mod_openssl_init)
{
plugin_data_singleton = (plugin_data *)calloc(1, sizeof(plugin_data));
return plugin_data_singleton;
}
FREE_FUNC(mod_openssl_free)
{
plugin_data *p = p_d;
if (!p) return HANDLER_GO_ON;
if (p->config_storage) {
for (size_t i = 0; i < srv->config_context->used; ++i) {
plugin_config *s = p->config_storage[i];
int copy;
if (NULL == s) continue;
copy = s->ssl_enabled && buffer_string_is_empty(s->ssl_pemfile);
buffer_free(s->ssl_pemfile);
buffer_free(s->ssl_ca_file);
buffer_free(s->ssl_ca_crl_file);
buffer_free(s->ssl_ca_dn_file);
buffer_free(s->ssl_cipher_list);
buffer_free(s->ssl_dh_file);
buffer_free(s->ssl_ec_curve);
buffer_free(s->ssl_verifyclient_username);
if (copy) continue;
SSL_CTX_free(s->ssl_ctx);
EVP_PKEY_free(s->ssl_pemfile_pkey);
X509_free(s->ssl_pemfile_x509);
if (NULL != s->ssl_ca_file_cert_names)
sk_X509_NAME_pop_free(s->ssl_ca_file_cert_names,X509_NAME_free);
}
for (size_t i = 0; i < srv->config_context->used; ++i) {
plugin_config *s = p->config_storage[i];
if (NULL == s) continue;
free(s);
}
free(p->config_storage);
}
if (ssl_is_init) {
#if OPENSSL_VERSION_NUMBER >= 0x10100000L \
&& !defined(LIBRESSL_VERSION_NUMBER)
/*(OpenSSL libraries handle thread init and deinit)
* https://github.com/openssl/openssl/pull/1048 */
#else
CRYPTO_cleanup_all_ex_data();
ERR_free_strings();
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
ERR_remove_thread_state(NULL);
#else
ERR_remove_state(0);
#endif
EVP_cleanup();
#endif
free(local_send_buffer);
}
free(p);
return HANDLER_GO_ON;
}
static int
safer_X509_NAME_oneline(X509_NAME *name, char *buf, size_t sz)
{
BIO *bio = BIO_new(BIO_s_mem());
if (bio) {
int len = X509_NAME_print_ex(bio, name, 0, XN_FLAG_ONELINE);
BIO_gets(bio, buf, (int)sz); /*(may be truncated if len >= sz)*/
BIO_free(bio);
return len; /*return value has similar semantics to that of snprintf()*/
}
else {
buf[0] = '\0';
return -1;
}
}
static void
ssl_info_callback (const SSL *ssl, int where, int ret)
{
UNUSED(ret);
if (0 != (where & SSL_CB_HANDSHAKE_START)) {
handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl);
++hctx->renegotiations;
}
}
/* https://wiki.openssl.org/index.php/Manual:SSL_CTX_set_verify(3)#EXAMPLES */
static int
verify_callback(int preverify_ok, X509_STORE_CTX *ctx)
{
char buf[256];
X509 *err_cert;
int err, depth;
SSL *ssl;
handler_ctx *hctx;
server *srv;
err = X509_STORE_CTX_get_error(ctx);
depth = X509_STORE_CTX_get_error_depth(ctx);
/*
* Retrieve the pointer to the SSL of the connection currently treated
* and the application specific data stored into the SSL object.
*/
ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
hctx = (handler_ctx *) SSL_get_app_data(ssl);
srv = hctx->srv;
/*
* Catch a too long certificate chain. The depth limit set using
* SSL_CTX_set_verify_depth() is by purpose set to "limit+1" so
* that whenever the "depth>verify_depth" condition is met, we
* have violated the limit and want to log this error condition.
* We must do it here, because the CHAIN_TOO_LONG error would not
* be found explicitly; only errors introduced by cutting off the
* additional certificates would be logged.
*/
if (depth > hctx->conf.ssl_verifyclient_depth) {
preverify_ok = 0;
err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
X509_STORE_CTX_set_error(ctx, err);
}
if (preverify_ok && 0 == depth
&& !buffer_string_is_empty(hctx->conf.ssl_ca_dn_file)
&& !buffer_string_is_empty(hctx->conf.ssl_ca_file)) {
/* verify that client cert is issued by CA in ssl.ca-dn-file
* if both ssl.ca-dn-file and ssl.ca-file were configured */
STACK_OF(X509_NAME) * const names = hctx->conf.ssl_ca_file_cert_names;
X509_NAME *issuer;
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
err_cert = X509_STORE_CTX_get_current_cert(ctx);
#else
err_cert = ctx->current_cert;
#endif
if (NULL == err_cert) return !hctx->conf.ssl_verifyclient_enforce;
issuer = X509_get_issuer_name(err_cert);
#if 0 /*(?desirable/undesirable to have ssl_ca_file_cert_names sorted?)*/
if (-1 != sk_X509_NAME_find(names, issuer))
return preverify_ok; /* match */
#else
for (int i = 0, len = sk_X509_NAME_num(names); i < len; ++i) {
if (0 == X509_NAME_cmp(sk_X509_NAME_value(names, i), issuer))
return preverify_ok; /* match */
}
#endif
preverify_ok = 0;
err = X509_V_ERR_CERT_REJECTED;
X509_STORE_CTX_set_error(ctx, err);
}
if (preverify_ok) {
return preverify_ok;
}
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
err_cert = X509_STORE_CTX_get_current_cert(ctx);
#else
err_cert = ctx->current_cert;
#endif
if (NULL == err_cert) return !hctx->conf.ssl_verifyclient_enforce;
safer_X509_NAME_oneline(X509_get_subject_name(err_cert),buf,sizeof(buf));
log_error_write(srv, __FILE__, __LINE__, "SDSSSDSS",
"SSL: verify error:num=", err, ":",
X509_verify_cert_error_string(err), ":depth=", depth,
":subject=", buf);
/*
* At this point, err contains the last verification error. We can use
* it for something special
*/
if (!preverify_ok && (err == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY ||
err == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT)) {
safer_X509_NAME_oneline(X509_get_issuer_name(err_cert),buf,sizeof(buf));
log_error_write(srv, __FILE__, __LINE__, "SS", "SSL: issuer=", buf);
}
return !hctx->conf.ssl_verifyclient_enforce;
}
#ifndef OPENSSL_NO_TLSEXT
static int mod_openssl_patch_connection (server *srv, connection *con, handler_ctx *hctx);
static int
network_ssl_servername_callback (SSL *ssl, int *al, server *srv)
{
const char *servername;
handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl);
connection *con = hctx->con;
UNUSED(al);
buffer_copy_string(con->uri.scheme, "https");
servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (NULL == servername) {
#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;
}
/* use SNI to patch mod_openssl config and then reset COMP_HTTP_HOST */
buffer_copy_string(con->uri.authority, servername);
buffer_to_lower(con->uri.authority);
con->conditional_is_valid[COMP_HTTP_SCHEME] = 1;
con->conditional_is_valid[COMP_HTTP_HOST] = 1;
mod_openssl_patch_connection(srv, con, hctx);
/* reset COMP_HTTP_HOST so that conditions re-run after request hdrs read */
/*(done in response.c:config_cond_cache_reset() after request hdrs read)*/
/*config_cond_cache_reset_item(con, COMP_HTTP_HOST);*/
/*buffer_reset(con->uri.authority);*/
if (NULL == hctx->conf.ssl_pemfile_x509
|| NULL == hctx->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->uri.authority);
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
/* first set certificate!
* setting private key checks whether certificate matches it */
if (1 != SSL_use_certificate(ssl, hctx->conf.ssl_pemfile_x509)) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"failed to set certificate for TLS server name",
con->uri.authority,
ERR_error_string(ERR_get_error(), NULL));
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
if (1 != SSL_use_PrivateKey(ssl, hctx->conf.ssl_pemfile_pkey)) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"failed to set private key for TLS server name",
con->uri.authority,
ERR_error_string(ERR_get_error(), NULL));
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
if (hctx->conf.ssl_verifyclient) {
int mode;
if (NULL == hctx->conf.ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"can't verify client without ssl.ca-file "
"or ssl.ca-dn-file for TLS server name",
con->uri.authority,
ERR_error_string(ERR_get_error(), NULL));
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
SSL_set_client_CA_list(
ssl, SSL_dup_CA_list(hctx->conf.ssl_ca_file_cert_names));
/* forcing verification here is really not that useful
* -- a client could just connect without SNI */
mode = SSL_VERIFY_PEER;
if (hctx->conf.ssl_verifyclient_enforce) {
mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
}
SSL_set_verify(ssl, mode, verify_callback);
SSL_set_verify_depth(ssl, hctx->conf.ssl_verifyclient_depth + 1);
} else {
SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL);
}
return SSL_TLSEXT_ERR_OK;
}
#endif
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, plugin_config *s, size_t 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;
}
#else
UNUSED(ndx);
#endif
s->ssl_pemfile_x509 = x509_load_pem_file(srv, s->ssl_pemfile->ptr);
if (NULL == s->ssl_pemfile_x509) return -1;
s->ssl_pemfile_pkey = evp_pkey_load_pem_file(srv, s->ssl_pemfile->ptr);
if (NULL == s->ssl_pemfile_pkey) 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;
}
static int
network_init_ssl (server *srv, void *p_d)
{
plugin_data *p = p_d;
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
EC_KEY *ecdh;
int nid;
#endif
#endif
#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,
};
/* load SSL certificates */
for (size_t i = 0; i < srv->config_context->used; ++i) {
plugin_config *s = p->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 (s->ssl_enabled) {
if (buffer_string_is_empty(s->ssl_pemfile)) {
/* inherit ssl settings from global scope
* (if only ssl.engine = "enable" and no other ssl.* settings)*/
if (0 != i && p->config_storage[0]->ssl_enabled) {
s->ssl_ctx = p->config_storage[0]->ssl_ctx;
continue;
}
/* PEM file is require */
log_error_write(srv, __FILE__, __LINE__, "s",
"ssl.pemfile has to be set "
"when ssl.engine = \"enable\"");
return -1;
}
}
if (buffer_string_is_empty(s->ssl_pemfile)
&& buffer_string_is_empty(s->ssl_ca_dn_file)
&& buffer_string_is_empty(s->ssl_ca_file)) continue;
if (ssl_is_init == 0) {
#if OPENSSL_VERSION_NUMBER >= 0x10100000L \
&& !defined(LIBRESSL_VERSION_NUMBER)
OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS
|OPENSSL_INIT_LOAD_CRYPTO_STRINGS,NULL);
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
|OPENSSL_INIT_ADD_ALL_DIGESTS
|OPENSSL_INIT_LOAD_CONFIG, NULL);
#else
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
#endif
ssl_is_init = 1;
if (0 == RAND_status()) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"not enough entropy in the pool");
return -1;
}
local_send_buffer = malloc(LOCAL_SEND_BUFSIZE);
force_assert(NULL != local_send_buffer);
}
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, s, i)) return -1;
}
if (!buffer_string_is_empty(s->ssl_ca_dn_file)) {
s->ssl_ca_file_cert_names =
SSL_load_client_CA_file(s->ssl_ca_dn_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_dn_file);
}
}
if (NULL == s->ssl_ca_file_cert_names
&& !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 && 0 != SSL_OP_NO_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 && 0 != SSL_OP_NO_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 (size_t j = 0; j < srv->config_context->used; ++j) {
plugin_config *s1 = p->config_storage[j];
if (!buffer_string_is_empty(s1->ssl_ca_dn_file)) {
if (1 != SSL_CTX_load_verify_locations(
s->ssl_ctx, s1->ssl_ca_dn_file->ptr, NULL)) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL),
s1->ssl_ca_dn_file);
return -1;
}
}
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) {
int mode;
if (NULL == s->ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "s",
"SSL: You specified ssl.verifyclient.activate "
"but no ssl.ca-file or ssl.ca-dn-file");
return -1;
}
SSL_CTX_set_client_CA_list(
s->ssl_ctx, SSL_dup_CA_list(s->ssl_ca_file_cert_names));
mode = SSL_VERIFY_PEER;
if (s->ssl_verifyclient_enforce) {
mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
}
SSL_CTX_set_verify(s->ssl_ctx, mode, verify_callback);
SSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth + 1);
if (!buffer_string_is_empty(s->ssl_ca_crl_file)) {
X509_STORE *store = SSL_CTX_get_cert_store(s->ssl_ctx);
if (1 != X509_STORE_load_locations(store, s->ssl_ca_crl_file->ptr, NULL)) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_ca_crl_file);
return -1;
}
X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL);
}
}
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, s->ssl_read_ahead);
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
}
return 0;
}
SETDEFAULTS_FUNC(mod_openssl_set_defaults)
{
plugin_data *p = p_d;
config_values_t cv[] = {
{ "debug.log-ssl-noise", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "ssl.engine", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ "ssl.pemfile", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
{ "ssl.ca-file", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 3 */
{ "ssl.dh-file", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 4 */
{ "ssl.ec-curve", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 5 */
{ "ssl.cipher-list", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 6 */
{ "ssl.honor-cipher-order", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 7 */
{ "ssl.empty-fragments", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 8 */
{ "ssl.disable-client-renegotiation", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 9 */
{ "ssl.read-ahead", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 10 */
{ "ssl.verifyclient.activate", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 11 */
{ "ssl.verifyclient.enforce", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 12 */
{ "ssl.verifyclient.depth", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 13 */
{ "ssl.verifyclient.username", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 14 */
{ "ssl.verifyclient.exportcert", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 15 */
{ "ssl.use-sslv2", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 16 */
{ "ssl.use-sslv3", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 17 */
{ "ssl.ca-crl-file", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 18 */
{ "ssl.ca-dn-file", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 19 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
if (!p) return HANDLER_ERROR;
p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
for (size_t i = 0; i < srv->config_context->used; i++) {
data_config const* config = (data_config const*)srv->config_context->data[i];
plugin_config *s = calloc(1, sizeof(plugin_config));
s->ssl_enabled = 0;
s->ssl_pemfile = buffer_init();
s->ssl_ca_file = buffer_init();
s->ssl_ca_crl_file = buffer_init();
s->ssl_ca_dn_file = buffer_init();
s->ssl_cipher_list = buffer_init();
s->ssl_dh_file = buffer_init();
s->ssl_ec_curve = buffer_init();
s->ssl_honor_cipher_order = 1;
s->ssl_empty_fragments = 0;
s->ssl_use_sslv2 = 0;
s->ssl_use_sslv3 = 0;
s->ssl_verifyclient = 0;
s->ssl_verifyclient_enforce = 1;
s->ssl_verifyclient_username = buffer_init();
s->ssl_verifyclient_depth = 9;
s->ssl_verifyclient_export_cert = 0;
s->ssl_disable_client_renegotiation = 1;