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lighttpd1.4/src/mod_openssl.c

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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 "sys-crypto.h"
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/pem.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 "http_header.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_privkey;
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;
array *ssl_conf_cmd;
buffer *ssl_acme_tls_1;
} 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 (16 * 1024)
static char *local_send_buffer;
typedef struct {
SSL *ssl;
connection *con;
short renegotiations; /* count of SSL_CB_HANDSHAKE_START */
short close_notify;
unsigned short request_env_patched;
unsigned short alpn;
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));
#ifdef DEBUG_WOLFSSL
wolfSSL_Debugging_ON();
#endif
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_privkey);
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);
array_free(s->ssl_conf_cmd);
buffer_free(s->ssl_acme_tls_1);
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);
if (hctx->renegotiations >= 0) ++hctx->renegotiations;
}
#ifdef TLS1_3_VERSION
/* https://github.com/openssl/openssl/issues/5721
* "TLSv1.3 unexpected InfoCallback after handshake completed" */
if (0 != (where & SSL_CB_HANDSHAKE_DONE)) {
/* SSL_version() is valid after initial handshake completed */
if (SSL_version(ssl) >= TLS1_3_VERSION) {
/* https://wiki.openssl.org/index.php/TLS1.3
* "Renegotiation is not possible in a TLSv1.3 connection" */
handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl);
hctx->renegotiations = -1;
}
}
#endif
}
/* 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
mod_openssl_SNI (SSL *ssl, server *srv, handler_ctx *hctx, const char *servername, size_t len)
{
if (len >= 1024) { /*(expecting < 256; TLSEXT_MAXLEN_host_name is 255)*/
log_error(srv->errh, __FILE__, __LINE__,
"SSL: SNI name too long %.*s", (int)len, servername);
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
/* use SNI to patch mod_openssl config and then reset COMP_HTTP_HOST */
connection * const con = hctx->con;
buffer_copy_string_len(con->uri.authority, servername, len);
buffer_to_lower(con->uri.authority);
#if 0
/*(con->uri.authority used below for configuration before request read;
* revisit for h2)*/
if (0 != http_request_host_policy(con, con->uri.authority, con->uri.scheme))
return SSL_TLSEXT_ERR_ALERT_FATAL;
#endif
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_clear(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;
}
#ifdef SSL_CLIENT_HELLO_SUCCESS
static int
mod_openssl_client_hello_cb (SSL *ssl, int *al, void *srv)
{
handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl);
buffer_copy_string(hctx->con->uri.scheme, "https");
const unsigned char *name;
size_t len, slen;
if (!SSL_client_hello_get0_ext(ssl, TLSEXT_TYPE_server_name, &name, &len)) {
return SSL_CLIENT_HELLO_SUCCESS; /* client did not provide SNI */
}
/* expecting single element in the server_name extension; parse first one */
if (len > 5
&& (size_t)((name[0] << 8) + name[1]) == len-2
&& name[2] == TLSEXT_TYPE_server_name
&& (slen = (name[3] << 8) + name[4]) <= len-5) { /*(first)*/
int rc = mod_openssl_SNI(ssl, srv, hctx, (const char *)name+5, slen);
if (rc == SSL_TLSEXT_ERR_OK)
return SSL_CLIENT_HELLO_SUCCESS;
}
*al = TLS1_AD_UNRECOGNIZED_NAME;
return SSL_CLIENT_HELLO_ERROR;
}
#else
static int
network_ssl_servername_callback (SSL *ssl, int *al, server *srv)
{
handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl);
buffer_copy_string(hctx->con->uri.scheme, "https");
UNUSED(al);
const char *servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
return (NULL != servername)
? mod_openssl_SNI(ssl, srv, hctx, servername, strlen(servername))
: SSL_TLSEXT_ERR_NOACK; /* client did not provide SNI */
}
#endif
#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 = !buffer_string_is_empty(s->ssl_privkey)
? evp_pkey_load_pem_file(srv, s->ssl_privkey->ptr)
: 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__, "sssbb", "SSL:",
"Private key does not match the certificate public key,"
" reason:", ERR_error_string(ERR_get_error(), NULL),
s->ssl_pemfile, s->ssl_privkey);
return -1;
}
return 0;
}
#ifndef OPENSSL_NO_TLSEXT
#if OPENSSL_VERSION_NUMBER >= 0x10002000
static int
mod_openssl_acme_tls_1 (SSL *ssl, handler_ctx *hctx)
{
server *srv = hctx->srv;
buffer *b = srv->tmp_buf;
buffer *name = hctx->con->uri.authority;
X509 *ssl_pemfile_x509 = NULL;
EVP_PKEY *ssl_pemfile_pkey = NULL;
size_t len;
int rc = SSL_TLSEXT_ERR_ALERT_FATAL;
/* check if acme-tls/1 protocol is enabled (path to dir of cert(s) is set)*/
if (buffer_string_is_empty(hctx->conf.ssl_acme_tls_1))
return SSL_TLSEXT_ERR_NOACK; /*(reuse value here for not-configured)*/
buffer_copy_buffer(b, hctx->conf.ssl_acme_tls_1);
buffer_append_slash(b);
/* check if SNI set server name (required for acme-tls/1 protocol)
* and perform simple path checks for no '/'
* and no leading '.' (e.g. ignore "." or ".." or anything beginning '.') */
if (buffer_string_is_empty(name)) return rc;
if (NULL != strchr(name->ptr, '/')) return rc;
if (name->ptr[0] == '.') return rc;
#if 0
if (0 != http_request_host_policy(hctx->con, name, hctx->con->uri.scheme))
return rc;
#endif
buffer_append_string_buffer(b, name);
len = buffer_string_length(b);
do {
buffer_append_string_len(b, CONST_STR_LEN(".crt.pem"));
ssl_pemfile_x509 = x509_load_pem_file(srv, b->ptr);
if (NULL == ssl_pemfile_x509) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
"Failed to load acme-tls/1 pemfile:", b);
break;
}
buffer_string_set_length(b, len); /*(remove ".crt.pem")*/
buffer_append_string_len(b, CONST_STR_LEN(".key.pem"));
ssl_pemfile_pkey = evp_pkey_load_pem_file(srv, b->ptr);
if (NULL == ssl_pemfile_pkey) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
"Failed to load acme-tls/1 pemfile:", b);
break;
}
#if 0 /* redundant with below? */
if (!X509_check_private_key(ssl_pemfile_x509, ssl_pemfile_pkey)) {
log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:",
"Private key does not match acme-tls/1 certificate public key,"
" reason:" ERR_error_string(ERR_get_error(), NULL), b);
break;
}
#endif
/* first set certificate!
* setting private key checks whether certificate matches it */
if (1 != SSL_use_certificate(ssl, ssl_pemfile_x509)) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"failed to set acme-tls/1 certificate for TLS server name",
name, ERR_error_string(ERR_get_error(), NULL));
break;
}
if (1 != SSL_use_PrivateKey(ssl, ssl_pemfile_pkey)) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"failed to set acme-tls/1 private key for TLS server name",
name, ERR_error_string(ERR_get_error(), NULL));
break;
}
rc = SSL_TLSEXT_ERR_OK;
} while (0);
if (ssl_pemfile_pkey) EVP_PKEY_free(ssl_pemfile_pkey);
if (ssl_pemfile_x509) X509_free(ssl_pemfile_x509);
return rc;
}
enum {
MOD_OPENSSL_ALPN_HTTP11 = 1
,MOD_OPENSSL_ALPN_HTTP10 = 2
,MOD_OPENSSL_ALPN_H2 = 3
,MOD_OPENSSL_ALPN_ACME_TLS_1 = 4
};
/* https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids */
static int
mod_openssl_alpn_select_cb (SSL *ssl, const unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg)
{
handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl);
unsigned short proto;
UNUSED(arg);
for (unsigned int i = 0, n; i < inlen; i += n) {
n = in[i++];
if (i+n > inlen || 0 == n) break;
switch (n) {
#if 0
case 2: /* "h2" */
if (in[i] == 'h' && in[i+1] == '2') {
proto = MOD_OPENSSL_ALPN_H2;
break;
}
continue;
#endif
case 8: /* "http/1.1" "http/1.0" */
if (0 == memcmp(in+i, "http/1.", 7)) {
if (in[i+7] == '1') {
proto = MOD_OPENSSL_ALPN_HTTP11;
break;
}
if (in[i+7] == '0') {
proto = MOD_OPENSSL_ALPN_HTTP10;
break;
}
}
continue;
case 10: /* "acme-tls/1" */
if (0 == memcmp(in+i, "acme-tls/1", 10)) {
int rc = mod_openssl_acme_tls_1(ssl, hctx);
if (rc == SSL_TLSEXT_ERR_OK) {
proto = MOD_OPENSSL_ALPN_ACME_TLS_1;
break;
}
/* (use SSL_TLSEXT_ERR_NOACK for not-configured) */
if (rc == SSL_TLSEXT_ERR_NOACK) continue;
return rc;
}
continue;
default:
continue;
}
hctx->alpn = proto;
*out = in+i;
*outlen = n;
return SSL_TLSEXT_ERR_OK;
}
#if OPENSSL_VERSION_NUMBER < 0x10100000L
return SSL_TLSEXT_ERR_NOACK;
#else
return SSL_TLSEXT_ERR_ALERT_FATAL;
#endif
}
#endif /* OPENSSL_VERSION_NUMBER >= 0x10002000 */
#endif /* OPENSSL_NO_TLSEXT */
static int
network_openssl_ssl_conf_cmd (server *srv, plugin_config *s)
{
#ifdef SSL_CONF_FLAG_CMDLINE
int rc = 0;
const data_string *ds;
SSL_CONF_CTX * const cctx = SSL_CONF_CTX_new();
SSL_CONF_CTX_set_ssl_ctx(cctx, s->ssl_ctx);
SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE
| SSL_CONF_FLAG_SERVER
| SSL_CONF_FLAG_SHOW_ERRORS
| SSL_CONF_FLAG_CERTIFICATE);
/* always disable null and export ciphers */
ds = (const data_string *)
array_get_element_klen(s->ssl_conf_cmd,
CONST_STR_LEN("CipherString"));
if (NULL != ds) {
buffer_append_string_len(ds->value,
CONST_STR_LEN(":!aNULL:!eNULL:!EXP"));
}
for (size_t i = 0; i < s->ssl_conf_cmd->used; ++i) {
ds = (data_string *)s->ssl_conf_cmd->data[i];
ERR_clear_error();
if (SSL_CONF_cmd(cctx, ds->key->ptr, ds->value->ptr) <= 0) {
log_error_write(srv, __FILE__, __LINE__, "ssbbss", "SSL:",
"SSL_CONF_cmd", ds->key, ds->value, ":",
ERR_error_string(ERR_get_error(), NULL));
rc = -1;
break;
}
}
if (0 == rc && 1 != SSL_CONF_CTX_finish(cctx)) {
log_error_write(srv, __FILE__, __LINE__, "sss", "SSL:",
"SSL_CONF_CTX_finish():",
ERR_error_string(ERR_get_error(), NULL));
rc = -1;
}
SSL_CONF_CTX_free(cctx);
return rc;
#else
UNUSED(s);
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"ssl.openssl.ssl-conf-cmd not available; ignored");
return 0;
#endif
}
static int
network_init_ssl (server *srv, void *p_d)
{
plugin_data *p = p_d;
#ifndef OPENSSL_NO_DH
/* 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
/* 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 OPENSSL_VERSION_NUMBER >= 0x10100000L
s->ssl_ctx = (!s->ssl_use_sslv2 && !s->ssl_use_sslv3)
? SSL_CTX_new(TLS_server_method())
: SSL_CTX_new(SSLv23_server_method());
#else
s->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
#endif
if (NULL == s->ssl_ctx) {
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);
#ifndef HAVE_WOLFSSL_SSL_H /*(wolfSSL does not support SSLv2)*/
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;
}
}
#endif
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
{
DH *dh;
/* Support for Diffie-Hellman key exchange */
if (!buffer_string_is_empty(s->ssl_dh_file)) {
/* DH parameters from file */
BIO *bio;
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
{
int nid = 0;
/* 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 {
#if OPENSSL_VERSION_NUMBER < 0x10002000
/* Default curve */
nid = OBJ_sn2nid("prime256v1");
#elif OPENSSL_VERSION_NUMBER < 0x10100000L \
|| defined(LIBRESSL_VERSION_NUMBER)
if (!SSL_CTX_set_ecdh_auto(s->ssl_ctx, 1)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"SSL: SSL_CTX_set_ecdh_auto() failed");
}
#endif
}
if (nid) {
EC_KEY *ecdh;
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_chain_file(s->ssl_ctx,
s->ssl_pemfile->ptr)) {
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__, "ssbb", "SSL:",
ERR_error_string(ERR_get_error(), NULL),
s->ssl_pemfile, s->ssl_privkey);
return -1;
}
if (SSL_CTX_check_private_key(s->ssl_ctx) != 1) {
log_error_write(srv, __FILE__, __LINE__, "sssbb", "SSL:",
"Private key does not match the certificate public "
"key, reason:",
ERR_error_string(ERR_get_error(), NULL),
s->ssl_pemfile, s->ssl_privkey);
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
#ifdef SSL_CLIENT_HELLO_SUCCESS
SSL_CTX_set_client_hello_cb(s->ssl_ctx,mod_openssl_client_hello_cb,srv);
#else
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
#if OPENSSL_VERSION_NUMBER >= 0x10002000
SSL_CTX_set_alpn_select_cb(s->ssl_ctx,mod_openssl_alpn_select_cb,NULL);
#endif
#endif
if (s->ssl_conf_cmd->used) {
if (0 != network_openssl_ssl_conf_cmd(srv, s)) return -1;
}
}
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 */
{ "ssl.openssl.ssl-conf-cmd", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 20 */
{ "ssl.acme-tls-1", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 21 */
{ "ssl.privkey", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 22 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
if (!p) return HANDLER_ERROR;
p->config_storage = calloc(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_privkey = 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;
s->ssl_read_ahead = (0 == i)
? 0
: p->config_storage[0]->ssl_read_ahead;
if (0 == i)
buffer_copy_string_len(s->ssl_cipher_list, CONST_STR_LEN("HIGH"));
if (0 != i) {
buffer *b;
b = p->config_storage[0]->ssl_ca_crl_file;
if (!buffer_string_is_empty(b))
buffer_copy_buffer(s->ssl_ca_crl_file, b);
b = p->config_storage[0]->ssl_ca_dn_file;
if (!buffer_string_is_empty(b))
buffer_copy_buffer(s->ssl_ca_dn_file, b);
b = p->config_storage[0]->ssl_cipher_list;
if (!buffer_string_is_empty(b))
buffer_copy_buffer(s->ssl_cipher_list, b);
}
s->ssl_conf_cmd = (0 == i)
? array_init()
: array_init_array(p->config_storage[0]->ssl_conf_cmd);
s->ssl_acme_tls_1 = buffer_init();
cv[0].destination = &(s->ssl_log_noise);
cv[1].destination = &(s->ssl_enabled);
cv[2].destination = s->ssl_pemfile;
cv[3].destination = s->ssl_ca_file;
cv[4].destination = s->ssl_dh_file;
cv[5].destination = s->ssl_ec_curve;
cv[6].destination = s->ssl_cipher_list;
cv[7].destination = &(s->ssl_honor_cipher_order);
cv[8].destination = &(s->ssl_empty_fragments);
cv[9].destination = &(s->ssl_disable_client_renegotiation);
cv[10].destination = &(s->ssl_read_ahead);
cv[11].destination = &(s->ssl_verifyclient);
cv[12].destination = &(s->ssl_verifyclient_enforce);
cv[13].destination = &(s->ssl_verifyclient_depth);
cv[14].destination = s->ssl_verifyclient_username;
cv[15].destination = &(s->ssl_verifyclient_export_cert);
cv[16].destination = &(s->ssl_use_sslv2);
cv[17].destination = &(s->ssl_use_sslv3);
cv[18].destination = s->ssl_ca_crl_file;
cv[19].destination = s->ssl_ca_dn_file;
cv[20].destination = s->ssl_conf_cmd;
cv[21].destination = s->ssl_acme_tls_1;
cv[22].destination = s->ssl_privkey;
p->config_storage[i] = s;
if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
return HANDLER_ERROR;
}
if (0 != i && s->ssl_enabled && buffer_string_is_empty(s->ssl_pemfile)){
/* inherit ssl settings from global scope (in network_init_ssl())
* (if only ssl.engine = "enable" and no other ssl.* settings)*/
for (size_t j = 0; j < config->value->used; ++j) {
buffer *k = config->value->data[j]->key;
if (0 == strncmp(k->ptr, "ssl.", sizeof("ssl.")-1)
&& !buffer_is_equal_string(k, CONST_STR_LEN("ssl.engine"))){
log_error_write(srv, __FILE__, __LINE__, "sb",
"ssl.pemfile has to be set in same scope "
"as other ssl.* directives, unless only "
"ssl.engine is set, inheriting ssl.* from "
"global scope", k);
return HANDLER_ERROR;
}
}
}
if (0 != i && s->ssl_enabled && config->comp != COMP_SERVER_SOCKET) {
log_error_write(srv, __FILE__, __LINE__, "s",
"ssl.engine is valid only in global scope "
"or $SERVER[\"socket\"] condition");
}
if (!array_is_kvstring(s->ssl_conf_cmd)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"ssl.openssl.ssl-conf-cmd must be array "
"of \"key\" => \"value\" strings");
}
}
if (0 != network_init_ssl(srv, p)) return HANDLER_ERROR;
return HANDLER_GO_ON;
}
#define PATCH(x) \
hctx->conf.x = s->x;
static int
mod_openssl_patch_connection (server *srv, connection *con, handler_ctx *hctx)
{
plugin_config *s = plugin_data_singleton->config_storage[0];
/*PATCH(ssl_enabled);*//*(not patched)*/
/*PATCH(ssl_pemfile);*//*(not patched)*/
/*PATCH(ssl_privkey);*//*(not patched)*/
PATCH(ssl_pemfile_x509);
PATCH(ssl_pemfile_pkey);
PATCH(ssl_ca_file);
/*PATCH(ssl_ca_crl_file);*//*(not patched)*/
PATCH(ssl_ca_dn_file);
PATCH(ssl_ca_file_cert_names);
/*PATCH(ssl_cipher_list);*//*(not patched)*/
/*PATCH(ssl_dh_file);*//*(not patched)*/
/*PATCH(ssl_ec_curve);*//*(not patched)*/
/*PATCH(ssl_honor_cipher_order);*//*(not patched)*/
/*PATCH(ssl_empty_fragments);*//*(not patched)*/
/*PATCH(ssl_use_sslv2);*//*(not patched)*/
/*PATCH(ssl_use_sslv3);*//*(not patched)*/
/*PATCH(ssl_conf_cmd);*//*(not patched)*/
PATCH(ssl_verifyclient);
PATCH(ssl_verifyclient_enforce);
PATCH(ssl_verifyclient_depth);
PATCH(ssl_verifyclient_username);
PATCH(ssl_verifyclient_export_cert);
PATCH(ssl_disable_client_renegotiation);
PATCH(ssl_read_ahead);
PATCH(ssl_acme_tls_1);
PATCH(ssl_log_noise);
/* skip the first, the global context */
for (size_t i = 1; i < srv->config_context->used; ++i) {
data_config *dc = (data_config *)srv->config_context->data[i];
s = plugin_data_singleton->config_storage[i];
/* condition didn't match */
if (!config_check_cond(srv, con, dc)) continue;
/* merge config */
for (size_t j = 0; j < dc->value->used; ++j) {
data_unset *du = dc->value->data[j];
if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.pemfile"))) {
/*PATCH(ssl_pemfile);*//*(not patched)*/
/*PATCH(ssl_privkey);*//*(not patched)*/
PATCH(ssl_pemfile_x509);
PATCH(ssl_pemfile_pkey);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.ca-file"))) {
PATCH(ssl_ca_file);
PATCH(ssl_ca_file_cert_names);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.ca-dn-file"))) {
PATCH(ssl_ca_dn_file);
PATCH(ssl_ca_file_cert_names);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.verifyclient.activate"))) {
PATCH(ssl_verifyclient);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.verifyclient.enforce"))) {
PATCH(ssl_verifyclient_enforce);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.verifyclient.depth"))) {
PATCH(ssl_verifyclient_depth);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.verifyclient.username"))) {
PATCH(ssl_verifyclient_username);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.verifyclient.exportcert"))) {
PATCH(ssl_verifyclient_export_cert);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.disable-client-renegotiation"))) {
PATCH(ssl_disable_client_renegotiation);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.read-ahead"))) {
PATCH(ssl_read_ahead);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.acme-tls-1"))) {
PATCH(ssl_acme_tls_1);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("debug.log-ssl-noise"))) {
PATCH(ssl_log_noise);
#if 0 /*(not patched)*/
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.ca-crl-file"))) {
PATCH(ssl_ca_crl_file);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.honor-cipher-order"))) {
PATCH(ssl_honor_cipher_order);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.empty-fragments"))) {
PATCH(ssl_empty_fragments);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.use-sslv2"))) {
PATCH(ssl_use_sslv2);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.use-sslv3"))) {
PATCH(ssl_use_sslv3);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.cipher-list"))) {
PATCH(ssl_cipher_list);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.dh-file"))) {
PATCH(ssl_dh_file);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.ec-curve"))) {
PATCH(ssl_ec_curve);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.engine"))) {
PATCH(ssl_enabled);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("ssl.openssl.ssl-conf-cmd"))) {
PATCH(ssl_conf_cmd);
#endif
}
}
}
return 0;
}
#undef PATCH
static int
load_next_chunk (server *srv, chunkqueue *cq, off_t max_bytes,
const char **data, size_t *data_len)
{
chunk *c = cq->first;
/* local_send_buffer is a static buffer of size (LOCAL_SEND_BUFSIZE)
*
* it has to stay at the same location all the time to satisfy the needs
* of SSL_write to pass the SAME parameter in case of a _WANT_WRITE
*
* buffer is allocated once, is NOT realloced (note: not thread-safe)
*
* (Note: above restriction no longer true since SSL_CTX_set_mode() is
* called with SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)
* */
force_assert(NULL != c);
switch (c->type) {
case MEM_CHUNK:
*data = NULL;
*data_len = 0;
do {
size_t have;
force_assert(c->offset >= 0
&& c->offset <= (off_t)buffer_string_length(c->mem));
have = buffer_string_length(c->mem) - c->offset;
/* copy small mem chunks into single large buffer before SSL_write()
* to reduce number times write() called underneath SSL_write() and
* potentially reduce number of packets generated if TCP_NODELAY */
if (*data_len) {
size_t space = LOCAL_SEND_BUFSIZE - *data_len;
if (have > space)
have = space;
if (have > (size_t)max_bytes - *data_len)
have = (size_t)max_bytes - *data_len;
if (*data != local_send_buffer) {
memcpy(local_send_buffer, *data, *data_len);
*data = local_send_buffer;
}
memcpy(local_send_buffer+*data_len,c->mem->ptr+c->offset,have);
*data_len += have;
continue;
}
if ((off_t) have > max_bytes) have = max_bytes;
*data = c->mem->ptr + c->offset;
*data_len = have;
} while ((c = c->next) && c->type == MEM_CHUNK
&& *data_len < LOCAL_SEND_BUFSIZE
&& (off_t) *data_len < max_bytes);
return 0;
case FILE_CHUNK:
if (0 != chunkqueue_open_file_chunk(srv, cq)) return -1;
{
off_t offset, toSend;
force_assert(c->offset >= 0 && c->offset <= c->file.length);
offset = c->file.start + c->offset;
toSend = c->file.length - c->offset;
if (toSend > LOCAL_SEND_BUFSIZE) toSend = LOCAL_SEND_BUFSIZE;
if (toSend > max_bytes) toSend = max_bytes;
if (-1 == lseek(c->file.fd, offset, SEEK_SET)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"lseek: ", strerror(errno));
return -1;
}
if (-1 == (toSend = read(c->file.fd, local_send_buffer, toSend))) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"read: ", strerror(errno));
return -1;
}
*data = local_send_buffer;
*data_len = toSend;
}
return 0;
}
return -1;
}
static int
mod_openssl_close_notify(server *srv, handler_ctx *hctx);
static int
connection_write_cq_ssl (server *srv, connection *con,
chunkqueue *cq, off_t max_bytes)
{
handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id];
SSL *ssl = hctx->ssl;
if (0 != hctx->close_notify) return mod_openssl_close_notify(srv, hctx);
chunkqueue_remove_finished_chunks(cq);
while (max_bytes > 0 && NULL != cq->first) {
const char *data;
size_t data_len;
int r;
if (0 != load_next_chunk(srv,cq,max_bytes,&data,&data_len)) return -1;
/**
* SSL_write man-page
*
* WARNING
* When an SSL_write() operation has to be repeated because of
* SSL_ERROR_WANT_READ or SSL_ERROR_WANT_WRITE, it must be
* repeated with the same arguments.
*/
ERR_clear_error();
r = SSL_write(ssl, data, data_len);
if (hctx->renegotiations > 1
&& hctx->conf.ssl_disable_client_renegotiation) {
log_error_write(srv, __FILE__, __LINE__, "s",
"SSL: renegotiation initiated by client, killing connection");
return -1;
}
if (r <= 0) {
int ssl_r;
unsigned long err;
switch ((ssl_r = SSL_get_error(ssl, r))) {
case SSL_ERROR_WANT_READ:
con->is_readable = -1;
return 0; /* try again later */
case SSL_ERROR_WANT_WRITE:
con->is_writable = -1;
return 0; /* try again later */
case SSL_ERROR_SYSCALL:
/* perhaps we have error waiting in our error-queue */
if (0 != (err = ERR_get_error())) {
do {
log_error_write(srv, __FILE__, __LINE__, "sdds",
"SSL:", ssl_r, r,
ERR_error_string(err, NULL));
} while((err = ERR_get_error()));
} else if (r == -1) {
/* no, but we have errno */
switch(errno) {
case EPIPE:
case ECONNRESET:
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "sddds",
"SSL:", ssl_r, r, errno,
strerror(errno));
break;
}
} else {
/* neither error-queue nor errno ? */
log_error_write(srv, __FILE__, __LINE__, "sddds",
"SSL (error):", ssl_r, r, errno,
strerror(errno));
}
break;
case SSL_ERROR_ZERO_RETURN:
/* clean shutdown on the remote side */
if (r == 0) return -2;
/* fall through */
default:
while((err = ERR_get_error())) {
log_error_write(srv, __FILE__, __LINE__, "sdds",
"SSL:", ssl_r, r,
ERR_error_string(err, NULL));
}
break;
}
return -1;
}
chunkqueue_mark_written(cq, r);
max_bytes -= r;
if ((size_t) r < data_len) break; /* try again later */
}
return 0;
}
static int
connection_read_cq_ssl (server *srv, connection *con,
chunkqueue *cq, off_t max_bytes)
{
handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id];
int r, ssl_err, len;
char *mem = NULL;
size_t mem_len = 0;
/*(code transform assumption; minimize diff)*/
force_assert(cq == con->read_queue);
UNUSED(max_bytes);
if (0 != hctx->close_notify) return mod_openssl_close_notify(srv, hctx);
ERR_clear_error();
do {
len = SSL_pending(hctx->ssl);
mem_len = len < 2048 ? 2048 : (size_t)len;
mem = chunkqueue_get_memory(con->read_queue, &mem_len);
#if 0
/* overwrite everything with 0 */
memset(mem, 0, mem_len);
#endif
len = SSL_read(hctx->ssl, mem, mem_len);
if (len > 0) {
chunkqueue_use_memory(con->read_queue, len);
con->bytes_read += len;
} else {
chunkqueue_use_memory(con->read_queue, 0);
}
if (hctx->renegotiations > 1
&& hctx->conf.ssl_disable_client_renegotiation) {
log_error_write(srv, __FILE__, __LINE__, "s",
"SSL: renegotiation initiated by client, killing connection");
return -1;
}
#if OPENSSL_VERSION_NUMBER >= 0x10002000
if (hctx->alpn) {
if (hctx->alpn == MOD_OPENSSL_ALPN_ACME_TLS_1) {
chunkqueue_reset(con->read_queue);
/* initiate handshake in order to send ServerHello.
* Once TLS handshake is complete, return -1 to result in
* CON_STATE_ERROR so that socket connection is quickly closed*/
if (1 == SSL_do_handshake(hctx->ssl)) return -1;
len = -1;
break;
}
hctx->alpn = 0;
}
#endif
} while (len > 0
&& (hctx->conf.ssl_read_ahead || SSL_pending(hctx->ssl) > 0));
if (len < 0) {
int oerrno = errno;
switch ((r = SSL_get_error(hctx->ssl, len))) {
case SSL_ERROR_WANT_WRITE:
con->is_writable = -1;
/* fall through */
case SSL_ERROR_WANT_READ:
con->is_readable = 0;
/* the manual says we have to call SSL_read with the same arguments
* next time. we ignore this restriction; no one has complained
* about it in 1.5 yet, so it probably works anyway.
*/
return 0;
case SSL_ERROR_SYSCALL:
/**
* man SSL_get_error()
*
* SSL_ERROR_SYSCALL
* Some I/O error occurred. The OpenSSL error queue may contain
* more information on the error. If the error queue is empty
* (i.e. ERR_get_error() returns 0), ret can be used to find out
* more about the error: If ret == 0, an EOF was observed that
* violates the protocol. If ret == -1, the underlying BIO
* reported an I/O error (for socket I/O on Unix systems, consult
* errno for details).
*
*/
while((ssl_err = ERR_get_error())) {
/* get all errors from the error-queue */
log_error_write(srv, __FILE__, __LINE__, "sds", "SSL:",
r, ERR_error_string(ssl_err, NULL));
}
switch(oerrno) {
default:
/* (oerrno should be something like ECONNABORTED not 0
* if client disconnected before anything was sent
* (e.g. TCP connection probe), but it does not appear
* that openssl provides such notification, not even
* something like SSL_R_SSL_HANDSHAKE_FAILURE) */
if (0==oerrno && 0==cq->bytes_in && !hctx->conf.ssl_log_noise)
break;
log_error_write(srv, __FILE__, __LINE__, "sddds", "SSL:",
len, r, oerrno,
strerror(oerrno));
break;
}
break;
case SSL_ERROR_ZERO_RETURN:
/* clean shutdown on the remote side */
if (r == 0) {
/* FIXME: later */
}
/* fall through */
default:
while((ssl_err = ERR_get_error())) {
switch (ERR_GET_REASON(ssl_err)) {
case SSL_R_SSL_HANDSHAKE_FAILURE:
#ifdef SSL_R_TLSV1_ALERT_UNKNOWN_CA
case SSL_R_TLSV1_ALERT_UNKNOWN_CA:
#endif
#ifdef SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN
case SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN:
#endif
#ifdef SSL_R_SSLV3_ALERT_BAD_CERTIFICATE
case SSL_R_SSLV3_ALERT_BAD_CERTIFICATE:
#endif
if (!hctx->conf.ssl_log_noise) continue;
break;
default:
break;
}
/* get all errors from the error-queue */
log_error_write(srv, __FILE__, __LINE__, "sds", "SSL:",
r, ERR_error_string(ssl_err, NULL));
}
break;
}
return -1;
} else if (len == 0) {
con->is_readable = 0;
/* the other end close the connection -> KEEP-ALIVE */
return -2;
} else {
return 0;
}
}
CONNECTION_FUNC(mod_openssl_handle_con_accept)
{
plugin_data *p = p_d;
handler_ctx *hctx;
server_socket *srv_sock = con->srv_socket;
if (!srv_sock->is_ssl) return HANDLER_GO_ON;
hctx = handler_ctx_init();
hctx->con = con;
hctx->srv = srv;
con->plugin_ctx[p->id] = hctx;
mod_openssl_patch_connection(srv, con, hctx);
/* connect fd to SSL */
hctx->ssl = SSL_new(p->config_storage[srv_sock->sidx]->ssl_ctx);
if (NULL == hctx->ssl) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return HANDLER_ERROR;
}
buffer_copy_string_len(con->proto, CONST_STR_LEN("https"));
con->network_read = connection_read_cq_ssl;
con->network_write = connection_write_cq_ssl;
SSL_set_app_data(hctx->ssl, hctx);
SSL_set_accept_state(hctx->ssl);
if (1 != (SSL_set_fd(hctx->ssl, con->fd))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return HANDLER_ERROR;
}
return HANDLER_GO_ON;
}
static void
mod_openssl_detach(handler_ctx *hctx)
{
/* step aside from futher SSL processing
* (used after handle_connection_shut_wr hook) */
/* future: might restore prior network_read and network_write fn ptrs */
hctx->con->is_ssl_sock = 0;
/* if called after handle_connection_shut_wr hook, shutdown SHUT_WR */
if (-1 == hctx->close_notify) shutdown(hctx->con->fd, SHUT_WR);
hctx->close_notify = 1;
}
CONNECTION_FUNC(mod_openssl_handle_con_shut_wr)
{
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL == hctx) return HANDLER_GO_ON;
hctx->close_notify = -2;
if (SSL_is_init_finished(hctx->ssl)) {
mod_openssl_close_notify(srv, hctx);
}
else {
mod_openssl_detach(hctx);
}
return HANDLER_GO_ON;
}
static int
mod_openssl_close_notify(server *srv, handler_ctx *hctx)
{
int ret, ssl_r;
unsigned long err;
if (1 == hctx->close_notify) return -2;
ERR_clear_error();
switch ((ret = SSL_shutdown(hctx->ssl))) {
case 1:
mod_openssl_detach(hctx);
return -2;
case 0:
/* Drain SSL read buffers in case pending records need processing.
* Limit to reading next record to avoid denial of service when CPU
* processing TLS is slower than arrival speed of TLS data packets.
* (unless hctx->conf.ssl_read_ahead is set)
*
* references:
*
* "New session ticket breaks bidirectional shutdown of TLS 1.3 connection"
* https://github.com/openssl/openssl/issues/6262
*
* The peer is still allowed to send data after receiving the
* "close notify" event. If the peer did send data it need to be
* processed by calling SSL_read() before calling SSL_shutdown() a
* second time. SSL_read() will indicate the end of the peer data by
* returning <= 0 and SSL_get_error() returning
* SSL_ERROR_ZERO_RETURN. It is recommended to call SSL_read()
* between SSL_shutdown() calls.
*
* Additional discussion in "Auto retry in shutdown"
* https://github.com/openssl/openssl/pull/6340
*/
ssl_r = SSL_pending(hctx->ssl);
if (ssl_r) {
do {
char buf[4096];
ret = SSL_read(hctx->ssl, buf, (int)sizeof(buf));
} while (ret > 0 && (hctx->conf.ssl_read_ahead||(ssl_r-=ret)));
}
ERR_clear_error();
switch ((ret = SSL_shutdown(hctx->ssl))) {
case 1:
mod_openssl_detach(hctx);
return -2;
case 0:
hctx->close_notify = -1;
return 0;
default:
break;
}
/* fall through */
default:
if (!SSL_is_init_finished(hctx->ssl)) {
mod_openssl_detach(hctx);
return -2;
}
switch ((ssl_r = SSL_get_error(hctx->ssl, ret))) {
case SSL_ERROR_ZERO_RETURN:
case SSL_ERROR_WANT_WRITE:
case SSL_ERROR_WANT_READ:
hctx->close_notify = -1;
return 0; /* try again later */
case SSL_ERROR_SYSCALL:
/* perhaps we have error waiting in our error-queue */
if (0 != (err = ERR_get_error())) {
do {
log_error_write(srv, __FILE__, __LINE__, "sdds",
"SSL:", ssl_r, ret,
ERR_error_string(err, NULL));
} while((err = ERR_get_error()));
} else if (errno != 0) {
/*ssl bug (see lighttpd ticket #2213): sometimes errno==0*/
switch(errno) {
case EPIPE:
case ECONNRESET:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sddds",
"SSL (error):", ssl_r, ret, errno,
strerror(errno));
break;
}
}
break;
default:
while((err = ERR_get_error())) {
log_error_write(srv, __FILE__, __LINE__, "sdds",
"SSL:", ssl_r, ret,
ERR_error_string(err, NULL));
}
break;
}
}
ERR_clear_error();
hctx->close_notify = -1;
return ret;
}
CONNECTION_FUNC(mod_openssl_handle_con_close)
{
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL != hctx) {
handler_ctx_free(hctx);
con->plugin_ctx[p->id] = NULL;
}
UNUSED(srv);
return HANDLER_GO_ON;
}
static void
https_add_ssl_client_entries (server *srv, connection *con, handler_ctx *hctx)
{
X509 *xs;
X509_NAME *xn;
int i, nentries;
long vr = SSL_get_verify_result(hctx->ssl);
if (vr != X509_V_OK) {
char errstr[256];
ERR_error_string_n(vr, errstr, sizeof(errstr));
buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("FAILED:"));
buffer_append_string(srv->tmp_buf, errstr);
http_header_env_set(con,
CONST_STR_LEN("SSL_CLIENT_VERIFY"),
CONST_BUF_LEN(srv->tmp_buf));
return;
} else if (!(xs = SSL_get_peer_certificate(hctx->ssl))) {
http_header_env_set(con,
CONST_STR_LEN("SSL_CLIENT_VERIFY"),
CONST_STR_LEN("NONE"));
return;
} else {
http_header_env_set(con,
CONST_STR_LEN("SSL_CLIENT_VERIFY"),
CONST_STR_LEN("SUCCESS"));
}
xn = X509_get_subject_name(xs);
{
char buf[256];
int len = safer_X509_NAME_oneline(xn, buf, sizeof(buf));
if (len > 0) {
if (len >= (int)sizeof(buf)) len = (int)sizeof(buf)-1;
http_header_env_set(con,
CONST_STR_LEN("SSL_CLIENT_S_DN"),
buf, (size_t)len);
}
}
buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("SSL_CLIENT_S_DN_"));
for (i = 0, nentries = X509_NAME_entry_count(xn); i < nentries; ++i) {
int xobjnid;
const char * xobjsn;
X509_NAME_ENTRY *xe;
if (!(xe = X509_NAME_get_entry(xn, i))) {
continue;
}
xobjnid = OBJ_obj2nid((ASN1_OBJECT*)X509_NAME_ENTRY_get_object(xe));
xobjsn = OBJ_nid2sn(xobjnid);
if (xobjsn) {
buffer_string_set_length(srv->tmp_buf,sizeof("SSL_CLIENT_S_DN_")-1);
buffer_append_string(srv->tmp_buf, xobjsn);
http_header_env_set(con,
CONST_BUF_LEN(srv->tmp_buf),
(const char*)X509_NAME_ENTRY_get_data(xe)->data,
X509_NAME_ENTRY_get_data(xe)->length);
}
}
{
ASN1_INTEGER *xsn = X509_get_serialNumber(xs);
BIGNUM *serialBN = ASN1_INTEGER_to_BN(xsn, NULL);
char *serialHex = BN_bn2hex(serialBN);
http_header_env_set(con,
CONST_STR_LEN("SSL_CLIENT_M_SERIAL"),
serialHex, strlen(serialHex));
OPENSSL_free(serialHex);
BN_free(serialBN);
}
if (!buffer_string_is_empty(hctx->conf.ssl_verifyclient_username)) {
/* pick one of the exported values as "REMOTE_USER", for example
* ssl.verifyclient.username = "SSL_CLIENT_S_DN_UID"
* or
* ssl.verifyclient.username = "SSL_CLIENT_S_DN_emailAddress"
*/
buffer *varname = hctx->conf.ssl_verifyclient_username;
buffer *vb = http_header_env_get(con, CONST_BUF_LEN(varname));
if (vb) { /* same as http_auth.c:http_auth_setenv() */
http_header_env_set(con,
CONST_STR_LEN("REMOTE_USER"),
CONST_BUF_LEN(vb));
http_header_env_set(con,
CONST_STR_LEN("AUTH_TYPE"),
CONST_STR_LEN("SSL_CLIENT_VERIFY"));
}
}
if (hctx->conf.ssl_verifyclient_export_cert) {
BIO *bio;
if (NULL != (bio = BIO_new(BIO_s_mem()))) {
buffer *cert = srv->tmp_buf;
int n;
PEM_write_bio_X509(bio, xs);
n = BIO_pending(bio);
buffer_string_prepare_copy(cert, n);
BIO_read(bio, cert->ptr, n);
BIO_free(bio);
buffer_commit(cert, n);
http_header_env_set(con,
CONST_STR_LEN("SSL_CLIENT_CERT"),
CONST_BUF_LEN(cert));
}
}
X509_free(xs);
}
static void
http_cgi_ssl_env (server *srv, connection *con, handler_ctx *hctx)
{
const char *s;
const SSL_CIPHER *cipher;
UNUSED(srv);
s = SSL_get_version(hctx->ssl);
http_header_env_set(con,
CONST_STR_LEN("SSL_PROTOCOL"),
s, strlen(s));
if ((cipher = SSL_get_current_cipher(hctx->ssl))) {
int usekeysize, algkeysize;
char buf[LI_ITOSTRING_LENGTH];
s = SSL_CIPHER_get_name(cipher);
http_header_env_set(con,
CONST_STR_LEN("SSL_CIPHER"),
s, strlen(s));
usekeysize = SSL_CIPHER_get_bits(cipher, &algkeysize);
li_itostrn(buf, sizeof(buf), usekeysize);
http_header_env_set(con,
CONST_STR_LEN("SSL_CIPHER_USEKEYSIZE"),
buf, strlen(buf));
li_itostrn(buf, sizeof(buf), algkeysize);
http_header_env_set(con,
CONST_STR_LEN("SSL_CIPHER_ALGKEYSIZE"),
buf, strlen(buf));
}
}
CONNECTION_FUNC(mod_openssl_handle_request_env)
{
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL == hctx) return HANDLER_GO_ON;
if (hctx->request_env_patched) return HANDLER_GO_ON;
hctx->request_env_patched = 1;
http_cgi_ssl_env(srv, con, hctx);
if (hctx->conf.ssl_verifyclient) {
https_add_ssl_client_entries(srv, con, hctx);
}
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_openssl_handle_uri_raw)
{
/* mod_openssl must be loaded prior to mod_auth
* if mod_openssl is configured to set REMOTE_USER based on client cert */
/* mod_openssl must be loaded after mod_extforward
* if mod_openssl config is based on lighttpd.conf remote IP conditional
* using remote IP address set by mod_extforward, *unless* PROXY protocol
* is enabled with extforward.hap-PROXY = "enable", in which case the
* reverse is true: mod_extforward must be loaded after mod_openssl */
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL == hctx) return HANDLER_GO_ON;
mod_openssl_patch_connection(srv, con, hctx);
if (hctx->conf.ssl_verifyclient) {
mod_openssl_handle_request_env(srv, con, p);
}
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_openssl_handle_request_reset)
{
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (NULL == hctx) return HANDLER_GO_ON;
hctx->request_env_patched = 0;
UNUSED(srv);
return HANDLER_GO_ON;
}
int mod_openssl_plugin_init (plugin *p);
int mod_openssl_plugin_init (plugin *p)
{
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("openssl");
p->init = mod_openssl_init;
p->cleanup = mod_openssl_free;
p->priv_defaults= mod_openssl_set_defaults;
p->handle_connection_accept = mod_openssl_handle_con_accept;
p->handle_connection_shut_wr = mod_openssl_handle_con_shut_wr;
p->handle_connection_close = mod_openssl_handle_con_close;
p->handle_uri_raw = mod_openssl_handle_uri_raw;
p->handle_request_env = mod_openssl_handle_request_env;
p->connection_reset = mod_openssl_handle_request_reset;
p->data = NULL;
return 0;
}