diff options
Diffstat (limited to 'source4/heimdal/lib/krb5/convert_creds.c')
| -rw-r--r-- | source4/heimdal/lib/krb5/convert_creds.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/source4/heimdal/lib/krb5/convert_creds.c b/source4/heimdal/lib/krb5/convert_creds.c new file mode 100644 index 0000000000..bff56a2602 --- /dev/null +++ b/source4/heimdal/lib/krb5/convert_creds.c @@ -0,0 +1,179 @@ +/* + * Copyright (c) 1997 - 2004 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" +RCSID("$Id: convert_creds.c,v 1.32 2005/04/23 19:40:57 lha Exp $"); + +#include "krb5-v4compat.h" + +static krb5_error_code +check_ticket_flags(TicketFlags f) +{ + return 0; /* maybe add some more tests here? */ +} + +/* Convert the v5 credentials in `in_cred' to v4-dito in `v4creds'. + * This is done by sending them to the 524 function in the KDC. If + * `in_cred' doesn't contain a DES session key, then a new one is + * gotten from the KDC and stored in the cred cache `ccache'. + */ + +krb5_error_code KRB5_LIB_FUNCTION +krb524_convert_creds_kdc(krb5_context context, + krb5_creds *in_cred, + struct credentials *v4creds) +{ + krb5_error_code ret; + krb5_data reply; + krb5_storage *sp; + int32_t tmp; + krb5_data ticket; + char realm[REALM_SZ]; + krb5_creds *v5_creds = in_cred; + + ret = check_ticket_flags(v5_creds->flags.b); + if(ret) + goto out2; + + { + krb5_krbhst_handle handle; + + ret = krb5_krbhst_init(context, + krb5_principal_get_realm(context, + v5_creds->server), + KRB5_KRBHST_KRB524, + &handle); + if (ret) + goto out2; + + ret = krb5_sendto (context, + &v5_creds->ticket, + handle, + &reply); + krb5_krbhst_free(context, handle); + if (ret) + goto out2; + } + sp = krb5_storage_from_mem(reply.data, reply.length); + if(sp == NULL) { + ret = ENOMEM; + krb5_set_error_string (context, "malloc: out of memory"); + goto out2; + } + krb5_ret_int32(sp, &tmp); + ret = tmp; + if(ret == 0) { + memset(v4creds, 0, sizeof(*v4creds)); + ret = krb5_ret_int32(sp, &tmp); + if(ret) + goto out; + v4creds->kvno = tmp; + ret = krb5_ret_data(sp, &ticket); + if(ret) + goto out; + v4creds->ticket_st.length = ticket.length; + memcpy(v4creds->ticket_st.dat, ticket.data, ticket.length); + krb5_data_free(&ticket); + ret = krb5_524_conv_principal(context, + v5_creds->server, + v4creds->service, + v4creds->instance, + v4creds->realm); + if(ret) + goto out; + v4creds->issue_date = v5_creds->times.starttime; + v4creds->lifetime = _krb5_krb_time_to_life(v4creds->issue_date, + v5_creds->times.endtime); + ret = krb5_524_conv_principal(context, v5_creds->client, + v4creds->pname, + v4creds->pinst, + realm); + if(ret) + goto out; + memcpy(v4creds->session, v5_creds->session.keyvalue.data, 8); + } else { + krb5_set_error_string(context, "converting credentials: %s", + krb5_get_err_text(context, ret)); + } +out: + krb5_storage_free(sp); + krb5_data_free(&reply); +out2: + if (v5_creds != in_cred) + krb5_free_creds (context, v5_creds); + return ret; +} + +krb5_error_code KRB5_LIB_FUNCTION +krb524_convert_creds_kdc_ccache(krb5_context context, + krb5_ccache ccache, + krb5_creds *in_cred, + struct credentials *v4creds) +{ + krb5_error_code ret; + krb5_creds *v5_creds = in_cred; + krb5_keytype keytype; + + keytype = v5_creds->session.keytype; + + if (keytype != ENCTYPE_DES_CBC_CRC) { + /* MIT krb524d doesn't like nothing but des-cbc-crc tickets, + so go get one */ + krb5_creds template; + + memset (&template, 0, sizeof(template)); + template.session.keytype = ENCTYPE_DES_CBC_CRC; + ret = krb5_copy_principal (context, in_cred->client, &template.client); + if (ret) { + krb5_free_cred_contents (context, &template); + return ret; + } + ret = krb5_copy_principal (context, in_cred->server, &template.server); + if (ret) { + krb5_free_cred_contents (context, &template); + return ret; + } + + ret = krb5_get_credentials (context, 0, ccache, + &template, &v5_creds); + krb5_free_cred_contents (context, &template); + if (ret) + return ret; + } + + ret = krb524_convert_creds_kdc(context, v5_creds, v4creds); + + if (v5_creds != in_cred) + krb5_free_creds (context, v5_creds); + return ret; +} |