--- /dev/null
+/*
+ * ngIRCd -- The Next Generation IRC Daemon
+ *
+ * SSL wrapper functions.
+ * Copyright (c) 2005-2008 Florian Westphal <fw@strlen.de>
+ */
+
+#include "portab.h"
+#include "imp.h"
+#include "conf-ssl.h"
+
+#ifdef SSL_SUPPORT
+
+#include "io.h"
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#define CONN_MODULE
+#include "conn.h"
+#include "conf.h"
+#include "conn-func.h"
+#include "conn-ssl.h"
+#include "log.h"
+
+#include "exp.h"
+#include "defines.h"
+
+extern struct SSLOptions Conf_SSLOptions;
+
+#ifdef HAVE_LIBSSL
+#include <openssl/err.h>
+#include <openssl/rand.h>
+
+static SSL_CTX * ssl_ctx;
+static DH *dh_params;
+
+static bool ConnSSL_LoadServerKey_openssl PARAMS(( SSL_CTX *c ));
+#endif
+
+#ifdef HAVE_LIBGNUTLS
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <gnutls/x509.h>
+
+#define DH_BITS 1024
+static gnutls_certificate_credentials_t x509_cred;
+static gnutls_dh_params_t dh_params;
+
+static bool ConnSSL_LoadServerKey_gnutls PARAMS(( void ));
+#endif
+
+static bool ConnSSL_Init_SSL PARAMS(( CONNECTION *c ));
+static int ConnectAccept PARAMS(( CONNECTION *c, bool connect ));
+static int ConnSSL_HandleError PARAMS(( CONNECTION *c, const int code, const char *fname ));
+
+#ifdef HAVE_LIBGNUTLS
+static char * openreadclose(const char *name, size_t *len)
+{
+ char *buf = NULL;
+ struct stat s;
+ ssize_t br;
+ int fd = open(name, O_RDONLY);
+ if (fd < 0) {
+ Log(LOG_ERR, "Could not open %s: %s", name, strerror(errno));
+ return NULL;
+ }
+ if (fstat(fd, &s)) {
+ Log(LOG_ERR, "Could not fstat %s: %s", name, strerror(errno));
+ goto out;
+ }
+ if (!S_ISREG(s.st_mode)) {
+ Log(LOG_ERR, "%s: Not a regular file", name);
+ goto out;
+ }
+ if (s.st_size <= 0) {
+ Log(LOG_ERR, "%s: invalid file length (size %ld <= 0)", name, (long) s.st_size);
+ goto out;
+ }
+ buf = malloc(s.st_size);
+ if (!buf) {
+ Log(LOG_ERR, "Could not malloc %lu bytes for file %s: %s", s.st_size, name, strerror(errno));
+ goto out;
+ }
+ br = read(fd, buf, s.st_size);
+ if (br != (ssize_t)s.st_size) {
+ Log(LOG_ERR, "Could not read file %s: read returned %ld, expected %ld: %s",
+ name, (long) br, (long) s.st_size, br == -1 ? strerror(errno):"short read?!");
+ memset(buf, 0, s.st_size);
+ free(buf);
+ buf = NULL;
+ } else {
+ *len = br;
+ }
+out:
+ close(fd);
+ return buf;
+}
+#endif
+
+
+#ifdef HAVE_LIBSSL
+static void
+LogOpenSSLError( const char *msg, const char *msg2 )
+{
+ unsigned long err = ERR_get_error();
+ char * errmsg = err ? ERR_error_string(err, NULL) : "Unable to determine error";
+
+ if (!msg) msg = "SSL Error";
+ if (msg2)
+ Log( LOG_ERR, "%s: %s: %s", msg, msg2, errmsg);
+ else
+ Log( LOG_ERR, "%s: %s", msg, errmsg);
+}
+
+
+static int
+pem_passwd_cb(char *buf, int size, int rwflag, void *password)
+{
+ array *pass = password;
+ int passlen;
+ assert(rwflag == 0); /* 0 -> callback used for decryption. See SSL_CTX_set_default_passwd_cb(3) */
+
+ passlen = (int) array_bytes(pass);
+
+ LogDebug("pem_passwd_cb buf size %d, array size %d", size, passlen);
+ assert(passlen >= 0);
+ if (passlen <= 0) {
+ Log(LOG_ERR, "pem_passwd_cb: password required, but not set");
+ return 0;
+ }
+ size = passlen > size ? size : passlen;
+ memcpy(buf, (char *)(array_start(pass)), size);
+ return size;
+}
+#endif
+
+
+static bool
+Load_DH_params(void)
+{
+#ifdef HAVE_LIBSSL
+ FILE *fp;
+ bool ret = true;
+
+ if (!Conf_SSLOptions.DHFile) {
+ Log(LOG_NOTICE, "Configuration option \"SSLDHFile\" not set");
+ return false;
+ }
+ fp = fopen(Conf_SSLOptions.DHFile, "r");
+ if (!fp) {
+ Log(LOG_ERR, "%s: %s", Conf_SSLOptions.DHFile, strerror(errno));
+ return false;
+ }
+ dh_params = PEM_read_DHparams(fp, NULL, NULL, NULL);
+ if (!dh_params) {
+ Log(LOG_ERR, "%s: PEM_read_DHparams failed", Conf_SSLOptions.DHFile);
+ ret = false;
+ }
+ fclose(fp);
+ return ret;
+#endif
+#ifdef HAVE_LIBGNUTLS
+ bool need_dhgenerate = true;
+ int err;
+ gnutls_dh_params_t tmp_dh_params;
+
+ err = gnutls_dh_params_init(&tmp_dh_params);
+ if (err < 0) {
+ Log(LOG_ERR, "gnutls_dh_params_init: %s", gnutls_strerror(err));
+ return false;
+ }
+ if (Conf_SSLOptions.DHFile) {
+ gnutls_datum_t dhparms;
+ size_t size;
+ dhparms.data = (unsigned char *) openreadclose(Conf_SSLOptions.DHFile, &size);
+ if (dhparms.data) {
+ dhparms.size = size;
+ err = gnutls_dh_params_import_pkcs3(tmp_dh_params, &dhparms, GNUTLS_X509_FMT_PEM);
+ if (err == 0)
+ need_dhgenerate = false;
+ else
+ Log(LOG_ERR, "gnutls_dh_params_init: %s", gnutls_strerror(err));
+
+ memset(dhparms.data, 0, size);
+ free(dhparms.data);
+ }
+ }
+ if (need_dhgenerate) {
+ Log(LOG_WARNING, "SSLDHFile not set, generating %u bit DH parameters. This may take a while...", DH_BITS);
+ err = gnutls_dh_params_generate2(tmp_dh_params, DH_BITS);
+ if (err < 0) {
+ Log(LOG_ERR, "gnutls_dh_params_generate2: %s", gnutls_strerror(err));
+ return false;
+ }
+ }
+ dh_params = tmp_dh_params;
+ return true;
+#endif
+}
+
+
+void ConnSSL_Free(CONNECTION *c)
+{
+#ifdef HAVE_LIBSSL
+ SSL *ssl = c->ssl_state.ssl;
+ if (ssl) {
+ SSL_shutdown(ssl);
+ SSL_free(ssl);
+ c->ssl_state.ssl = NULL;
+ }
+#endif
+#ifdef HAVE_LIBGNUTLS
+ gnutls_session_t sess = c->ssl_state.gnutls_session;
+ if (Conn_OPTION_ISSET(c, CONN_SSL)) {
+ gnutls_bye(sess, GNUTLS_SHUT_RDWR);
+ gnutls_deinit(sess);
+ }
+#endif
+ assert(Conn_OPTION_ISSET(c, CONN_SSL));
+ Conn_OPTION_DEL(c, (CONN_SSL_CONNECT|CONN_SSL|CONN_SSL_WANT_WRITE));
+}
+
+
+bool
+ConnSSL_InitLibrary( void )
+{
+#ifdef HAVE_LIBSSL
+ SSL_CTX *newctx;
+
+ if (!ssl_ctx) {
+ SSL_library_init();
+ SSL_load_error_strings();
+ }
+
+ if (!RAND_status()) {
+ Log(LOG_ERR, "OpenSSL PRNG not seeded: /dev/urandom missing?");
+ /*
+ * it is probably best to fail and let the user install EGD or a similar program if no kernel random device is available.
+ * According to OpenSSL RAND_egd(3): "The automatic query of /var/run/egd-pool et al was added in OpenSSL 0.9.7";
+ * so it makes little sense to deal with PRNGD seeding ourselves.
+ */
+ return false;
+ }
+
+ newctx = SSL_CTX_new(SSLv23_method());
+ if (!newctx) {
+ LogOpenSSLError("SSL_CTX_new()", NULL);
+ return false;
+ }
+
+ if (!ConnSSL_LoadServerKey_openssl(newctx))
+ goto out;
+
+ SSL_CTX_set_options(newctx, SSL_OP_SINGLE_DH_USE|SSL_OP_NO_SSLv2);
+ SSL_CTX_set_mode(newctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
+ SSL_CTX_free(ssl_ctx);
+ ssl_ctx = newctx;
+ Log(LOG_INFO, "%s initialized", SSLeay_version(SSLEAY_VERSION));
+ return true;
+out:
+ SSL_CTX_free(newctx);
+ return false;
+#endif
+#ifdef HAVE_LIBGNUTLS
+ int err;
+ static bool initialized;
+ if (initialized) /* TODO: cannot reload gnutls keys: can't simply free x509 context -- it may still be in use */
+ return false;
+
+ err = gnutls_global_init();
+ if (err) {
+ Log(LOG_ERR, "gnutls_global_init(): %s", gnutls_strerror(err));
+ return false;
+ }
+ if (!ConnSSL_LoadServerKey_gnutls())
+ return false;
+ Log(LOG_INFO, "gnutls %s initialized", gnutls_check_version(NULL));
+ initialized = true;
+ return true;
+#endif
+}
+
+
+#ifdef HAVE_LIBGNUTLS
+static bool
+ConnSSL_LoadServerKey_gnutls(void)
+{
+ int err;
+ const char *cert_file;
+
+ err = gnutls_certificate_allocate_credentials(&x509_cred);
+ if (err < 0) {
+ Log(LOG_ERR, "gnutls_certificate_allocate_credentials: %s", gnutls_strerror(err));
+ return false;
+ }
+
+ cert_file = Conf_SSLOptions.CertFile ? Conf_SSLOptions.CertFile:Conf_SSLOptions.KeyFile;
+ if (!cert_file) {
+ Log(LOG_ERR, "Neither Key nor certificate File set");
+ return false;
+ }
+
+ if (array_bytes(&Conf_SSLOptions.KeyFilePassword))
+ Log(LOG_WARNING, "Ignoring KeyFilePassword: Not supported by GNUTLS");
+
+ if (!Load_DH_params())
+ return false;
+
+ gnutls_certificate_set_dh_params(x509_cred, dh_params);
+ err = gnutls_certificate_set_x509_key_file(x509_cred, cert_file, Conf_SSLOptions.KeyFile, GNUTLS_X509_FMT_PEM);
+ if (err < 0) {
+ Log(LOG_ERR, "gnutls_certificate_set_x509_key_file (cert %s, key %s): %s",
+ cert_file, Conf_SSLOptions.KeyFile ? Conf_SSLOptions.KeyFile : "(NULL)", gnutls_strerror(err));
+ return false;
+ }
+ return true;
+}
+#endif
+
+
+#ifdef HAVE_LIBSSL
+static bool
+ConnSSL_LoadServerKey_openssl(SSL_CTX *ctx)
+{
+ char *cert_key;
+
+ assert(ctx);
+ if (!Conf_SSLOptions.KeyFile) {
+ Log(LOG_NOTICE, "No SSL Server Key configured, ssl disabled");
+ return false;
+ }
+
+ SSL_CTX_set_default_passwd_cb(ctx, pem_passwd_cb);
+ SSL_CTX_set_default_passwd_cb_userdata(ctx, &Conf_SSLOptions.KeyFilePassword);
+
+ if (SSL_CTX_use_PrivateKey_file(ctx, Conf_SSLOptions.KeyFile, SSL_FILETYPE_PEM) != 1) {
+ array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
+ LogOpenSSLError("SSL_CTX_use_PrivateKey_file", Conf_SSLOptions.KeyFile);
+ return false;
+ }
+
+ cert_key = Conf_SSLOptions.CertFile ? Conf_SSLOptions.CertFile:Conf_SSLOptions.KeyFile;
+ if (SSL_CTX_use_certificate_chain_file(ctx, cert_key) != 1) {
+ array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
+ LogOpenSSLError("SSL_CTX_use_certificate_file", cert_key);
+ return false;
+ }
+
+ array_free_wipe(&Conf_SSLOptions.KeyFilePassword);
+
+ if (!SSL_CTX_check_private_key(ctx)) {
+ LogOpenSSLError("Server Private Key does not match certificate", NULL);
+ return false;
+ }
+ if (Load_DH_params()) {
+ if (SSL_CTX_set_tmp_dh(ctx, dh_params) != 1)
+ LogOpenSSLError("Error setting DH Parameters", Conf_SSLOptions.DHFile);
+ /* don't return false here: the non-DH modes will still work */
+ DH_free(dh_params);
+ dh_params = NULL;
+ }
+ return true;
+}
+
+
+#endif
+static bool
+ConnSSL_Init_SSL(CONNECTION *c)
+{
+ int ret;
+ assert(c != NULL);
+#ifdef HAVE_LIBSSL
+ assert(ssl_ctx);
+ if (!ssl_ctx) /* NULL when library initialization failed */
+ return false;
+
+ assert(c->ssl_state.ssl == NULL);
+
+ c->ssl_state.ssl = SSL_new(ssl_ctx);
+ if (!c->ssl_state.ssl) {
+ LogOpenSSLError("SSL_new()", NULL);
+ return false;
+ }
+
+ ret = SSL_set_fd(c->ssl_state.ssl, c->sock);
+ if (ret != 1) {
+ LogOpenSSLError("SSL_set_fd()", NULL);
+ ConnSSL_Free(c);
+ return false;
+ }
+#endif
+#ifdef HAVE_LIBGNUTLS
+ ret = gnutls_set_default_priority(c->ssl_state.gnutls_session);
+ if (ret < 0) {
+ Log(LOG_ERR, "gnutls_set_default_priority: %s", gnutls_strerror(ret));
+ ConnSSL_Free(c);
+ }
+ gnutls_transport_set_ptr(c->ssl_state.gnutls_session, (gnutls_transport_ptr_t) c->sock);
+ ret = gnutls_credentials_set(c->ssl_state.gnutls_session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ if (ret < 0) {
+ Log(LOG_ERR, "gnutls_credentials_set: %s", gnutls_strerror(ret));
+ ConnSSL_Free(c);
+ }
+ gnutls_dh_set_prime_bits(c->ssl_state.gnutls_session, DH_BITS);
+#endif
+ Conn_OPTION_ADD(c, CONN_SSL);
+ return true;
+}
+
+
+bool
+ConnSSL_PrepareConnect(CONNECTION *c, UNUSED CONF_SERVER *s)
+{
+ bool ret;
+#ifdef HAVE_LIBGNUTLS
+ int err;
+#endif
+ assert(c != NULL);
+ assert(s != NULL);
+#ifdef HAVE_LIBGNUTLS
+ err = gnutls_init(&c->ssl_state.gnutls_session, GNUTLS_CLIENT);
+ if (err) {
+ Log(LOG_ERR, "gnutls_init: %s", gnutls_strerror(err));
+ return false;
+ }
+#endif
+ ret = ConnSSL_Init_SSL(c);
+ if (!ret)
+ return false;
+ Conn_OPTION_ADD(c, CONN_SSL_CONNECT);
+#ifdef HAVE_LIBSSL
+ assert(c->ssl_state.ssl);
+ SSL_set_verify(c->ssl_state.ssl, SSL_VERIFY_NONE, NULL);
+#endif
+ return true;
+}
+
+
+/*
+ Check an Handle Error return code after failed calls to ssl/tls functions.
+ OpenSSL:
+ SSL_connect(), SSL_accept(), SSL_do_handshake(), SSL_read(), SSL_peek(), or SSL_write() on ssl.
+ GNUTLS:
+ gnutlsssl_read(), gnutls_write() or gnutls_handshake().
+ Return: -1 on fatal error, 0 if we can try again later.
+ */
+static int
+ConnSSL_HandleError( CONNECTION *c, const int code, const char *fname )
+{
+#ifdef HAVE_LIBSSL
+ int ret = SSL_ERROR_SYSCALL;
+ unsigned long sslerr;
+ int real_errno = errno;
+
+ assert( fname );
+
+ ret = SSL_get_error(c->ssl_state.ssl, code);
+ switch (ret) {
+ case SSL_ERROR_WANT_READ:
+ io_event_del(c->sock, IO_WANTWRITE);
+ Conn_OPTION_ADD(c, CONN_SSL_WANT_READ);
+ return 0; /* try again later */
+ case SSL_ERROR_WANT_WRITE:
+ io_event_del(c->sock, IO_WANTREAD);
+ Conn_OPTION_ADD(c, CONN_SSL_WANT_WRITE); /* fall through */
+ case SSL_ERROR_NONE:
+ return 0; /* try again later */
+ case SSL_ERROR_ZERO_RETURN: /* TLS/SSL Connection was shut down */
+ LogOpenSSLError("TLS/SSL Connection shutdown", fname);
+ break;
+ /*
+ SSL_ERROR_WANT_CONNECT, SSL_ERROR_WANT_ACCEPT, SSL_ERROR_WANT_X509_LOOKUP
+ */
+ case SSL_ERROR_SYSCALL:
+ sslerr = ERR_get_error();
+ if (sslerr) {
+ Log( LOG_ERR, "%s: %s", fname, ERR_error_string(sslerr, NULL ));
+ } else {
+
+ switch (code) { /* EOF that violated protocol */
+ case 0:
+ Log(LOG_ERR, "%s: Client Disconnected", fname );
+ break;
+ case -1: /* low level socket I/O error, check errno */
+ Log(LOG_ERR, "%s: %s", fname, strerror(real_errno));
+ }
+ }
+ break;
+ case SSL_ERROR_SSL:
+ LogOpenSSLError("TLS/SSL Protocol Error", fname);
+ break;
+ default:
+ Log( LOG_ERR, "%s: Unknown error %d!", fname, ret);
+ }
+ ConnSSL_Free(c);
+ return -1;
+#endif
+#ifdef HAVE_LIBGNUTLS
+ switch (code) {
+ case GNUTLS_E_AGAIN:
+ case GNUTLS_E_INTERRUPTED:
+ if (gnutls_record_get_direction(c->ssl_state.gnutls_session)) { /* need write */
+ io_event_del(c->sock, IO_WANTREAD);
+ Conn_OPTION_ADD(c, CONN_SSL_WANT_WRITE); /* fall through */
+ break;
+ } else { /* need read */
+ io_event_del(c->sock, IO_WANTWRITE);
+ Conn_OPTION_ADD(c, CONN_SSL_WANT_READ);
+ break;
+ }
+ default:
+ assert(code < 0);
+ if (gnutls_error_is_fatal(code)) {
+ Log(LOG_ERR, "%s: %s", fname, gnutls_strerror(code));
+ ConnSSL_Free(c);
+ return -1;
+ }
+ }
+ return 0;
+#endif
+}
+
+
+static void
+ConnSSL_LogCertInfo( CONNECTION *c )
+{
+#ifdef HAVE_LIBSSL
+ SSL *ssl = c->ssl_state.ssl;
+
+ assert( c );
+ assert( ssl );
+
+ Log( LOG_INFO, "New %s connection using cipher %s on socket %d",
+ SSL_get_version(ssl), SSL_get_cipher(ssl), c->sock);
+#endif
+#ifdef HAVE_LIBGNUTLS
+ gnutls_credentials_type_t cred;
+ gnutls_session_t sess = c->ssl_state.gnutls_session;
+ gnutls_cipher_algorithm_t cipher = gnutls_cipher_get(sess);
+
+ Log( LOG_INFO, "New %s connection using cipher %s-%s on socket %d",
+ gnutls_protocol_get_name(gnutls_protocol_get_version(sess)),
+ gnutls_cipher_get_name(cipher), gnutls_mac_get_name(gnutls_mac_get(sess)), c->sock);
+#endif
+}
+
+
+/*
+ Accept incoming SSL connection.
+ Return Values:
+ 1: SSL Connection established
+ 0: try again
+ -1: SSL Connection not established due to fatal error.
+*/
+int
+ConnSSL_Accept( CONNECTION *c )
+{
+ assert(c != NULL);
+#ifdef HAVE_LIBSSL
+ if (!c->ssl_state.ssl) {
+#endif
+#ifdef HAVE_LIBGNUTLS
+ if (!Conn_OPTION_ISSET(c, CONN_SSL)) {
+ int err = gnutls_init(&c->ssl_state.gnutls_session, GNUTLS_SERVER);
+ if (err) {
+ Log(LOG_ERR, "gnutls_init: %s", gnutls_strerror(err));
+ return false;
+ }
+#endif
+ LogDebug("ConnSSL_Accept: Initializing SSL data");
+ if (!ConnSSL_Init_SSL(c))
+ return -1;
+ }
+ return ConnectAccept(c, false );
+}
+
+
+int
+ConnSSL_Connect( CONNECTION *c )
+{
+ assert(c != NULL);
+#ifdef HAVE_LIBSSL
+ assert(c->ssl_state.ssl);
+#endif
+#ifdef HAVE_LIBGNUTLS
+ assert(Conn_OPTION_ISSET(c, CONN_SSL));
+#endif
+ return ConnectAccept(c, true);
+}
+
+
+/* accept/connect wrapper. if connect is true, connect to peer, otherwise wait for incoming connection */
+static int
+ConnectAccept( CONNECTION *c, bool connect)
+{
+ int ret;
+#ifdef HAVE_LIBSSL
+ SSL *ssl = c->ssl_state.ssl;
+ assert(ssl != NULL);
+
+ ret = connect ? SSL_connect(ssl) : SSL_accept(ssl);
+ if (1 != ret)
+ return ConnSSL_HandleError(c, ret, connect ? "SSL_connect": "SSL_accept");
+#endif
+#ifdef HAVE_LIBGNUTLS
+ (void) connect;
+ assert(Conn_OPTION_ISSET(c, CONN_SSL));
+ ret = gnutls_handshake(c->ssl_state.gnutls_session);
+ if (ret)
+ return ConnSSL_HandleError(c, ret, "gnutls_handshake");
+#endif /* _GNUTLS */
+ Conn_OPTION_DEL(c, (CONN_SSL_WANT_WRITE|CONN_SSL_WANT_READ|CONN_SSL_CONNECT));
+ ConnSSL_LogCertInfo(c);
+ return 1;
+}
+
+
+ssize_t
+ConnSSL_Write(CONNECTION *c, const void *buf, size_t count)
+{
+ ssize_t bw;
+
+ Conn_OPTION_DEL(c, CONN_SSL_WANT_WRITE|CONN_SSL_WANT_READ);
+
+ assert(count > 0);
+#ifdef HAVE_LIBSSL
+ bw = (ssize_t) SSL_write(c->ssl_state.ssl, buf, count);
+#endif
+#ifdef HAVE_LIBGNUTLS
+ bw = gnutls_write(c->ssl_state.gnutls_session, buf, count);
+#endif
+ if ( bw > 0 ) return bw;
+ if (ConnSSL_HandleError( c, bw, "ConnSSL_Write") == 0)
+ errno = EAGAIN; /* try again */
+ return -1;
+}
+
+
+ssize_t
+ConnSSL_Read(CONNECTION *c, void * buf, size_t count)
+{
+ ssize_t br;
+
+ Conn_OPTION_DEL(c, CONN_SSL_WANT_WRITE|CONN_SSL_WANT_READ);
+#ifdef HAVE_LIBSSL
+ br = (ssize_t) SSL_read(c->ssl_state.ssl, buf, count);
+ if (br > 0) /* on EOF we have to call ConnSSL_HandleError(), see SSL_read(3) */
+ return br;
+#endif
+#ifdef HAVE_LIBGNUTLS
+ br = gnutls_read(c->ssl_state.gnutls_session, buf, count);
+ if (br >= 0) /* on EOF we must _not_ call ConnSSL_HandleError, see gnutls_record_recv(3) */
+ return br;
+#endif
+ /* error on read: switch ConnSSL_HandleError() return values -> 0 is "try again", so return -1 and set EAGAIN */
+ if (ConnSSL_HandleError(c, br, "ConnSSL_Read") == 0) {
+ errno = EAGAIN;
+ return -1;
+ }
+ return 0;
+}
+
+
+bool
+ConnSSL_GetCipherInfo(CONNECTION *c, char *buf, size_t len)
+{
+#ifdef HAVE_LIBSSL
+ SSL *ssl;
+ assert(c != NULL);
+ assert(len >= 128);
+ ssl = c->ssl_state.ssl;
+ if (!ssl) return false;
+ return SSL_CIPHER_description(SSL_get_current_cipher(ssl), buf, len) != NULL;
+#endif
+#ifdef HAVE_LIBGNUTLS
+ assert(c != NULL);
+ assert(len >= 128);
+ if (Conn_OPTION_ISSET(c, CONN_SSL)) {
+ const char *name_cipher, *name_mac, *name_proto, *name_keyexchange;
+ unsigned keysize;
+
+ gnutls_session_t sess = c->ssl_state.gnutls_session;
+ gnutls_cipher_algorithm_t cipher = gnutls_cipher_get(sess);
+ name_cipher = gnutls_cipher_get_name(cipher);
+ name_mac = gnutls_mac_get_name(gnutls_mac_get(sess));
+ keysize = gnutls_cipher_get_key_size(cipher) * 8;
+ name_proto = gnutls_protocol_get_name(gnutls_protocol_get_version(sess));
+ name_keyexchange = gnutls_kx_get_name(gnutls_kx_get(sess));
+
+ return snprintf(buf, len, "%s-%s%15s Kx=%s Enc=%s(%u) Mac=%s\n",
+ name_cipher, name_mac, name_proto, name_keyexchange, name_cipher, keysize, name_mac) > 0;
+ }
+ return false;
+#endif
+}
+
+
+#endif /* SSL_SUPPORT */
+/* -eof- */
+
+
projects / ngircd-alex.git / commitdiff