summaryrefslogtreecommitdiffstats
path: root/third_party/heimdal/lib/krb5/sendauth.c
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/heimdal/lib/krb5/sendauth.c')
-rw-r--r--third_party/heimdal/lib/krb5/sendauth.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/sendauth.c b/third_party/heimdal/lib/krb5/sendauth.c
new file mode 100644
index 0000000..5011c26
--- /dev/null
+++ b/third_party/heimdal/lib/krb5/sendauth.c
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 1997 - 2006 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "krb5_locl.h"
+
+/*
+ * The format seems to be:
+ * client -> server
+ *
+ * 4 bytes - length
+ * KRB5_SENDAUTH_V1.0 (including zero)
+ * 4 bytes - length
+ * protocol string (with terminating zero)
+ *
+ * server -> client
+ * 1 byte - (0 = OK, else some kind of error)
+ *
+ * client -> server
+ * 4 bytes - length
+ * AP-REQ
+ *
+ * server -> client
+ * 4 bytes - length (0 = OK, else length of error)
+ * (error)
+ *
+ * if(mutual) {
+ * server -> client
+ * 4 bytes - length
+ * AP-REP
+ * }
+ */
+
+/**
+ * Perform the client side of the sendauth protocol.
+ *
+ * @param context Kerberos 5 context.
+ * @param auth_context Authentication context of the peer.
+ * @param p_fd Socket associated to the connection.
+ * @param appl_version Server-specific string.
+ * @param client Client principal. If NULL, use the credentials in \a ccache.
+ * @param server Server principal.
+ * @param ap_req_options Options for the AP_REQ message. See the AP_OPTS_* defines in krb5.h.
+ * @param in_data FIXME
+ * @param in_creds FIXME
+ * @param ccache Credentials cache. If NULL, use the default credentials cache.
+ * @param ret_error If not NULL, will be set to the error reported by server, if any.
+ * Must be deallocated with krb5_free_error_contents().
+ * @param rep_result If not NULL, will be set to the EncApRepPart of the AP_REP message.
+ * Must be deallocated with krb5_free_ap_rep_enc_part().
+ * @param out_creds FIXME If not NULL, will be set to FIXME. Must be deallocated with
+ * krb5_free_creds().
+ *
+ * @return 0 to indicate success. Otherwise a Kerberos error code is
+ * returned, see krb5_get_error_message().
+ */
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_sendauth(krb5_context context,
+ krb5_auth_context *auth_context,
+ krb5_pointer p_fd,
+ const char *appl_version,
+ krb5_principal client,
+ krb5_principal server,
+ krb5_flags ap_req_options,
+ krb5_data *in_data,
+ krb5_creds *in_creds,
+ krb5_ccache ccache,
+ krb5_error **ret_error,
+ krb5_ap_rep_enc_part **rep_result,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ uint32_t len, net_len;
+ const char *version = KRB5_SENDAUTH_VERSION;
+ u_char repl;
+ krb5_data ap_req, error_data;
+ krb5_creds this_cred;
+ krb5_principal this_client = NULL;
+ krb5_creds *creds;
+ ssize_t sret;
+ krb5_boolean my_ccache = FALSE;
+
+ len = strlen(version) + 1;
+ net_len = htonl(len);
+ if (krb5_net_write (context, p_fd, &net_len, 4) != 4
+ || krb5_net_write (context, p_fd, version, len) != len) {
+ ret = errno;
+ krb5_set_error_message (context, ret, "write: %s", strerror(ret));
+ return ret;
+ }
+
+ len = strlen(appl_version) + 1;
+ net_len = htonl(len);
+ if (krb5_net_write (context, p_fd, &net_len, 4) != 4
+ || krb5_net_write (context, p_fd, appl_version, len) != len) {
+ ret = errno;
+ krb5_set_error_message (context, ret, "write: %s", strerror(ret));
+ return ret;
+ }
+
+ sret = krb5_net_read (context, p_fd, &repl, sizeof(repl));
+ if (sret < 0) {
+ ret = errno;
+ krb5_set_error_message (context, ret, "read: %s", strerror(ret));
+ return ret;
+ } else if (sret != sizeof(repl)) {
+ krb5_clear_error_message (context);
+ return KRB5_SENDAUTH_BADRESPONSE;
+ }
+
+ if (repl != 0) {
+ krb5_clear_error_message (context);
+ return KRB5_SENDAUTH_REJECTED;
+ }
+
+ if (in_creds == NULL) {
+ if (ccache == NULL) {
+ ret = krb5_cc_default (context, &ccache);
+ if (ret)
+ return ret;
+ my_ccache = TRUE;
+ }
+
+ if (client == NULL) {
+ ret = krb5_cc_get_principal (context, ccache, &this_client);
+ if (ret) {
+ if(my_ccache)
+ krb5_cc_close(context, ccache);
+ return ret;
+ }
+ client = this_client;
+ }
+ memset(&this_cred, 0, sizeof(this_cred));
+ this_cred.client = client;
+ this_cred.server = server;
+ this_cred.times.endtime = 0;
+ this_cred.ticket.length = 0;
+ in_creds = &this_cred;
+ }
+ if (in_creds->ticket.length == 0) {
+ ret = krb5_get_credentials (context, 0, ccache, in_creds, &creds);
+ if (ret) {
+ if(my_ccache)
+ krb5_cc_close(context, ccache);
+ return ret;
+ }
+ } else {
+ creds = in_creds;
+ }
+ if(my_ccache)
+ krb5_cc_close(context, ccache);
+ ret = krb5_mk_req_extended (context,
+ auth_context,
+ ap_req_options,
+ in_data,
+ creds,
+ &ap_req);
+
+ if (out_creds)
+ *out_creds = creds;
+ else
+ krb5_free_creds(context, creds);
+ if(this_client)
+ krb5_free_principal(context, this_client);
+
+ if (ret)
+ return ret;
+
+ ret = krb5_write_message (context,
+ p_fd,
+ &ap_req);
+ if (ret)
+ return ret;
+
+ krb5_data_free (&ap_req);
+
+ ret = krb5_read_message (context, p_fd, &error_data);
+ if (ret)
+ return ret;
+
+ if (error_data.length != 0) {
+ KRB_ERROR error;
+
+ ret = krb5_rd_error (context, &error_data, &error);
+ krb5_data_free (&error_data);
+ if (ret == 0) {
+ ret = krb5_error_from_rd_error(context, &error, NULL);
+ if (ret_error != NULL) {
+ *ret_error = malloc (sizeof(krb5_error));
+ if (*ret_error == NULL) {
+ krb5_free_error_contents (context, &error);
+ } else {
+ **ret_error = error;
+ }
+ } else {
+ krb5_free_error_contents (context, &error);
+ }
+ return ret;
+ } else {
+ krb5_clear_error_message(context);
+ return ret;
+ }
+ } else
+ krb5_data_free (&error_data);
+
+ if (ap_req_options & AP_OPTS_MUTUAL_REQUIRED) {
+ krb5_data ap_rep;
+ krb5_ap_rep_enc_part *ignore = NULL;
+
+ krb5_data_zero (&ap_rep);
+ ret = krb5_read_message (context,
+ p_fd,
+ &ap_rep);
+ if (ret)
+ return ret;
+
+ ret = krb5_rd_rep (context, *auth_context, &ap_rep,
+ rep_result ? rep_result : &ignore);
+ krb5_data_free (&ap_rep);
+ if (ret)
+ return ret;
+ if (rep_result == NULL)
+ krb5_free_ap_rep_enc_part (context, ignore);
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 02:22:05 +0000