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-rw-r--r--source3/smbd/ssl.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/source3/smbd/ssl.c b/source3/smbd/ssl.c
new file mode 100644
index 0000000000..7fcb48a954
--- /dev/null
+++ b/source3/smbd/ssl.c
@@ -0,0 +1,286 @@
+/*
+ Unix SMB/CIFS implementation.
+ SSLeay utility functions
+ Copyright (C) Christian Starkjohann <cs@obdev.at> 1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+ * since includes.h pulls in config.h which is were WITH_SSL will be
+ * defined, we want to include includes.h before testing for WITH_SSL
+ * RJS 26-Jan-1999
+ */
+
+#include "includes.h"
+
+#ifdef WITH_SSL /* should always be defined if this module is compiled */
+
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+
+BOOL sslEnabled;
+SSL *ssl = NULL;
+int sslFd = -1;
+static SSL_CTX *sslContext = NULL;
+extern int DEBUGLEVEL;
+
+static int ssl_verify_cb(int ok, X509_STORE_CTX *ctx)
+{
+char buffer[256];
+
+ X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),
+ buffer, sizeof(buffer));
+ if(ok){
+ DEBUG(0, ("SSL: Certificate OK: %s\n", buffer));
+ }else{
+ switch (ctx->error){
+ case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
+ DEBUG(0, ("SSL: Cert error: CA not known: %s\n", buffer));
+ break;
+ case X509_V_ERR_CERT_NOT_YET_VALID:
+ DEBUG(0, ("SSL: Cert error: Cert not yet valid: %s\n", buffer));
+ break;
+ case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
+ DEBUG(0, ("SSL: Cert error: illegal \'not before\' field: %s\n",
+ buffer));
+ break;
+ case X509_V_ERR_CERT_HAS_EXPIRED:
+ DEBUG(0, ("SSL: Cert error: Cert expired: %s\n", buffer));
+ break;
+ case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
+ DEBUG(0, ("SSL: Cert error: invalid \'not after\' field: %s\n",
+ buffer));
+ break;
+ default:
+ DEBUG(0, ("SSL: Cert error: unknown error %d in %s\n", ctx->error,
+ buffer));
+ break;
+ }
+ }
+ return ok;
+}
+
+static RSA *ssl_temp_rsa_cb(SSL *ssl, int is_export, int keylength)
+{
+static RSA *rsa = NULL;
+
+ if(rsa == NULL)
+ rsa = RSA_generate_key(keylength, RSA_F4, NULL, NULL);
+ return rsa;
+}
+
+/* This is called before we fork. It should ask the user for the pass phrase
+ * if necessary. Error output can still go to stderr because the process
+ * has a terminal.
+ */
+int sslutil_init(int isServer)
+{
+int err, entropybytes;
+char *certfile, *keyfile, *ciphers, *cacertDir, *cacertFile;
+char *egdsocket, *entropyfile;
+
+ SSL_load_error_strings();
+ SSLeay_add_ssl_algorithms();
+ egdsocket = lp_ssl_egdsocket();
+ if (egdsocket != NULL && *egdsocket != 0)
+ RAND_egd(egdsocket);
+ entropyfile = lp_ssl_entropyfile();
+ entropybytes = lp_ssl_entropybytes();
+ if (entropyfile != NULL && *entropyfile != 0)
+ RAND_load_file(entropyfile, entropybytes);
+ switch(lp_ssl_version()){
+ case SMB_SSL_V2: sslContext = SSL_CTX_new(SSLv2_method()); break;
+ case SMB_SSL_V3: sslContext = SSL_CTX_new(SSLv3_method()); break;
+ default:
+ case SMB_SSL_V23: sslContext = SSL_CTX_new(SSLv23_method()); break;
+ case SMB_SSL_TLS1: sslContext = SSL_CTX_new(TLSv1_method()); break;
+ }
+ if(sslContext == NULL){
+ err = ERR_get_error();
+ fprintf(stderr, "SSL: Error allocating context: %s\n",
+ ERR_error_string(err, NULL));
+ exit(1);
+ }
+ if(lp_ssl_compatibility()){
+ SSL_CTX_set_options(sslContext, SSL_OP_ALL);
+ }
+ certfile = isServer ? lp_ssl_server_cert() : lp_ssl_client_cert();
+ if((certfile == NULL || *certfile == 0) && isServer){
+ fprintf(stderr, "SSL: No cert file specified in config file!\n");
+ fprintf(stderr, "The server MUST have a certificate!\n");
+ exit(1);
+ }
+ keyfile = isServer ? lp_ssl_server_privkey() : lp_ssl_client_privkey();
+ if(keyfile == NULL || *keyfile == 0)
+ keyfile = certfile;
+ if(certfile != NULL && *certfile != 0){
+ if(!SSL_CTX_use_certificate_chain_file(sslContext, certfile)){
+ err = ERR_get_error();
+ fprintf(stderr, "SSL: error reading certificate from file %s: %s\n",
+ certfile, ERR_error_string(err, NULL));
+ exit(1);
+ }
+ if(!SSL_CTX_use_PrivateKey_file(sslContext, keyfile, SSL_FILETYPE_PEM)){
+ err = ERR_get_error();
+ fprintf(stderr, "SSL: error reading private key from file %s: %s\n",
+ keyfile, ERR_error_string(err, NULL));
+ exit(1);
+ }
+ if(!SSL_CTX_check_private_key(sslContext)){
+ err = ERR_get_error();
+ fprintf(stderr, "SSL: Private key does not match public key in cert!\n");
+ exit(1);
+ }
+ }
+ cacertDir = lp_ssl_cacertdir();
+ cacertFile = lp_ssl_cacertfile();
+ if(cacertDir != NULL && *cacertDir == 0)
+ cacertDir = NULL;
+ if(cacertFile != NULL && *cacertFile == 0)
+ cacertFile = NULL;
+ if(!SSL_CTX_load_verify_locations(sslContext, cacertFile, cacertDir)){
+ err = ERR_get_error();
+ if (cacertFile || cacertDir) {
+ fprintf(stderr, "SSL: Error error setting CA cert locations: %s\n",
+ ERR_error_string(err, NULL));
+ fprintf(stderr, "trying default locations.\n");
+ }
+ cacertFile = cacertDir = NULL;
+ if(!SSL_CTX_set_default_verify_paths(sslContext)){
+ err = ERR_get_error();
+ fprintf(stderr, "SSL: Error error setting default CA cert location: %s\n",
+ ERR_error_string(err, NULL));
+ exit(1);
+ }
+ }
+ SSL_CTX_set_tmp_rsa_callback(sslContext, ssl_temp_rsa_cb);
+ if((ciphers = lp_ssl_ciphers()) != NULL && *ciphers != 0)
+ SSL_CTX_set_cipher_list(sslContext, ciphers);
+ if((isServer && lp_ssl_reqClientCert()) || (!isServer && lp_ssl_reqServerCert())){
+ SSL_CTX_set_verify(sslContext,
+ SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, ssl_verify_cb);
+ }else{
+ SSL_CTX_set_verify(sslContext, SSL_VERIFY_NONE, ssl_verify_cb);
+ }
+#if 1 /* don't know what this is good for, but s_server in SSLeay does it, too */
+ if(isServer){
+ SSL_CTX_set_client_CA_list(sslContext, SSL_load_client_CA_file(certfile));
+ }
+#endif
+ return 0;
+}
+
+int sslutil_accept(int fd)
+{
+int err;
+
+ if(ssl != NULL){
+ DEBUG(0, ("SSL: internal error: more than one SSL connection (server)\n"));
+ return -1;
+ }
+ if((ssl = SSL_new(sslContext)) == NULL){
+ err = ERR_get_error();
+ DEBUG(0, ("SSL: Error allocating handle: %s\n",
+ ERR_error_string(err, NULL)));
+ return -1;
+ }
+ SSL_set_fd(ssl, fd);
+ sslFd = fd;
+ if(SSL_accept(ssl) <= 0){
+ err = ERR_get_error();
+ DEBUG(0, ("SSL: Error accepting on socket: %s\n",
+ ERR_error_string(err, NULL)));
+ return -1;
+ }
+ DEBUG(0, ("SSL: negotiated cipher: %s\n", SSL_get_cipher(ssl)));
+ return 0;
+}
+
+int sslutil_fd_is_ssl(int fd)
+{
+ return fd == sslFd;
+}
+
+int sslutil_connect(int fd)
+{
+int err;
+
+ if(ssl != NULL){
+ DEBUG(0, ("SSL: internal error: more than one SSL connection (client)\n"));
+ return -1;
+ }
+ if((ssl = SSL_new(sslContext)) == NULL){
+ err = ERR_get_error();
+ DEBUG(0, ("SSL: Error allocating handle: %s\n",
+ ERR_error_string(err, NULL)));
+ return -1;
+ }
+ SSL_set_fd(ssl, fd);
+ sslFd = fd;
+ if(SSL_connect(ssl) <= 0){
+ err = ERR_get_error();
+ DEBUG(0, ("SSL: Error conencting socket: %s\n",
+ ERR_error_string(err, NULL)));
+ return -1;
+ }
+ DEBUG(0, ("SSL: negotiated cipher: %s\n", SSL_get_cipher(ssl)));
+ return 0;
+}
+
+int sslutil_disconnect(int fd)
+{
+ if(fd == sslFd && ssl != NULL){
+ SSL_free(ssl);
+ ssl = NULL;
+ sslFd = -1;
+ }
+ return 0;
+}
+
+int sslutil_negotiate_ssl(int fd, int msg_type)
+{
+unsigned char buf[5] = {0x83, 0, 0, 1, 0x81};
+char *reqHosts, *resignHosts;
+
+ reqHosts = lp_ssl_hosts();
+ resignHosts = lp_ssl_hosts_resign();
+ if(!allow_access(resignHosts, reqHosts, get_socket_name(fd), get_socket_addr(fd))){
+ sslEnabled = False;
+ return 0;
+ }
+ if(msg_type != 0x81){ /* first packet must be a session request */
+ DEBUG( 0, ( "Client %s did not use session setup; access denied\n",
+ client_addr() ) );
+ if (!send_smb(fd, (char *)buf))
+ DEBUG(0, ("sslutil_negotiate_ssl: send_smb failed.\n"));
+ return -1;
+ }
+ buf[4] = 0x8e; /* negative session response: use SSL */
+ if (!send_smb(fd, (char *)buf)) {
+ DEBUG(0,("sslutil_negotiate_ssl: send_smb failed.\n"));
+ return -1;
+ }
+ if(sslutil_accept(fd) != 0){
+ DEBUG( 0, ( "Client %s failed SSL negotiation!\n", client_addr() ) );
+ return -1;
+ }
+ return 1;
+}
+
+#else /* WITH_SSL */
+ void ssl_dummy(void);
+ void ssl_dummy(void) {;} /* So some compilers don't complain. */
+#endif /* WITH_SSL */