212 lines
5.8 KiB
C
212 lines
5.8 KiB
C
/*
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* Copyright (c) 1997-2001 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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RCSID("$Id: recvauth.c,v 1.15 2001/05/14 06:14:51 assar Exp $");
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/*
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* See `sendauth.c' for the format.
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*/
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static krb5_boolean
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match_exact(void *data, const char *appl_version)
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{
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return strcmp(data, appl_version) == 0;
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}
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krb5_error_code
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krb5_recvauth(krb5_context context,
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krb5_auth_context *auth_context,
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krb5_pointer p_fd,
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char *appl_version,
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krb5_principal server,
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int32_t flags,
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krb5_keytab keytab,
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krb5_ticket **ticket)
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{
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return krb5_recvauth_match_version(context, auth_context, p_fd,
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match_exact, appl_version,
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server, flags,
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keytab, ticket);
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}
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krb5_error_code
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krb5_recvauth_match_version(krb5_context context,
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krb5_auth_context *auth_context,
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krb5_pointer p_fd,
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krb5_boolean (*match_appl_version)(void *,
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const char*),
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void *match_data,
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krb5_principal server,
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int32_t flags,
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krb5_keytab keytab,
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krb5_ticket **ticket)
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{
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krb5_error_code ret;
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const char *version = KRB5_SENDAUTH_VERSION;
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char her_version[sizeof(KRB5_SENDAUTH_VERSION)];
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char *her_appl_version;
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u_int32_t len;
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u_char repl;
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krb5_data data;
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krb5_flags ap_options;
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ssize_t n;
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/*
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* If there are no addresses in auth_context, get them from `fd'.
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*/
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if (*auth_context == NULL) {
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ret = krb5_auth_con_init (context, auth_context);
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if (ret)
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return ret;
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}
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ret = krb5_auth_con_setaddrs_from_fd (context,
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*auth_context,
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p_fd);
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if (ret)
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return ret;
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if(!(flags & KRB5_RECVAUTH_IGNORE_VERSION)) {
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n = krb5_net_read (context, p_fd, &len, 4);
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if (n < 0) {
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ret = errno;
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krb5_set_error_string (context, "read: %s", strerror(errno));
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return ret;
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}
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if (n == 0) {
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krb5_clear_error_string (context);
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return KRB5_SENDAUTH_BADAUTHVERS;
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}
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len = ntohl(len);
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if (len != sizeof(her_version)
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|| krb5_net_read (context, p_fd, her_version, len) != len
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|| strncmp (version, her_version, len)) {
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repl = 1;
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krb5_net_write (context, p_fd, &repl, 1);
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krb5_clear_error_string (context);
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return KRB5_SENDAUTH_BADAUTHVERS;
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}
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}
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n = krb5_net_read (context, p_fd, &len, 4);
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if (n < 0) {
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ret = errno;
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krb5_set_error_string (context, "read: %s", strerror(errno));
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return ret;
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}
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if (n == 0) {
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krb5_clear_error_string (context);
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return KRB5_SENDAUTH_BADAPPLVERS;
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}
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len = ntohl(len);
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her_appl_version = malloc (len);
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if (her_appl_version == NULL) {
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repl = 2;
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krb5_net_write (context, p_fd, &repl, 1);
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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if (krb5_net_read (context, p_fd, her_appl_version, len) != len
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|| !(*match_appl_version)(match_data, her_appl_version)) {
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repl = 2;
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krb5_net_write (context, p_fd, &repl, 1);
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krb5_set_error_string (context, "wrong sendauth version (%s)",
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her_appl_version);
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free (her_appl_version);
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return KRB5_SENDAUTH_BADAPPLVERS;
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}
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free (her_appl_version);
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repl = 0;
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if (krb5_net_write (context, p_fd, &repl, 1) != 1) {
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ret = errno;
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krb5_set_error_string (context, "write: %s", strerror(errno));
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return ret;
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}
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krb5_data_zero (&data);
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ret = krb5_read_message (context, p_fd, &data);
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if (ret)
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return ret;
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ret = krb5_rd_req (context,
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auth_context,
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&data,
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server,
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keytab,
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&ap_options,
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ticket);
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krb5_data_free (&data);
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if (ret) {
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krb5_data error_data;
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krb5_error_code ret2;
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ret2 = krb5_mk_error (context,
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ret,
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NULL,
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NULL,
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NULL,
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server,
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NULL,
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NULL,
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&error_data);
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if (ret2 == 0) {
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krb5_write_message (context, p_fd, &error_data);
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krb5_data_free (&error_data);
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}
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return ret;
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}
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len = 0;
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if (krb5_net_write (context, p_fd, &len, 4) != 4) {
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ret = errno;
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krb5_set_error_string (context, "write: %s", strerror(errno));
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return ret;
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}
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if (ap_options & AP_OPTS_MUTUAL_REQUIRED) {
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ret = krb5_mk_rep (context, *auth_context, &data);
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if (ret)
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return ret;
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ret = krb5_write_message (context, p_fd, &data);
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if (ret)
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return ret;
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krb5_data_free (&data);
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}
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return 0;
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}
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