diff options
Diffstat (limited to 'crypto/heimdal/lib/gssapi/acquire_cred.c')
| -rw-r--r-- | crypto/heimdal/lib/gssapi/acquire_cred.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/gssapi/acquire_cred.c b/crypto/heimdal/lib/gssapi/acquire_cred.c new file mode 100644 index 0000000..503ac91 --- /dev/null +++ b/crypto/heimdal/lib/gssapi/acquire_cred.c @@ -0,0 +1,303 @@ +/* + * Copyright (c) 1997 - 2003 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 "gssapi_locl.h" + +RCSID("$Id: acquire_cred.c,v 1.13 2003/04/06 00:31:55 lha Exp $"); + +static krb5_error_code +get_keytab(krb5_keytab *keytab) +{ + char kt_name[256]; + krb5_error_code kret; + + if (gssapi_krb5_keytab != NULL) { + kret = krb5_kt_get_name(gssapi_krb5_context, + gssapi_krb5_keytab, + kt_name, sizeof(kt_name)); + if (kret == 0) + kret = krb5_kt_resolve(gssapi_krb5_context, kt_name, keytab); + } else + kret = krb5_kt_default(gssapi_krb5_context, keytab); + return (kret); +} + +static OM_uint32 acquire_initiator_cred + (OM_uint32 * minor_status, + const gss_name_t desired_name, + OM_uint32 time_req, + const gss_OID_set desired_mechs, + gss_cred_usage_t cred_usage, + gss_cred_id_t handle, + gss_OID_set * actual_mechs, + OM_uint32 * time_rec + ) +{ + OM_uint32 ret; + krb5_creds cred; + krb5_principal def_princ; + krb5_get_init_creds_opt opt; + krb5_ccache ccache; + krb5_keytab keytab; + krb5_error_code kret; + + keytab = NULL; + ccache = NULL; + def_princ = NULL; + ret = GSS_S_FAILURE; + memset(&cred, 0, sizeof(cred)); + + kret = krb5_cc_default(gssapi_krb5_context, &ccache); + if (kret) + goto end; + kret = krb5_cc_get_principal(gssapi_krb5_context, ccache, + &def_princ); + if (kret != 0) { + /* we'll try to use a keytab below */ + krb5_cc_destroy(gssapi_krb5_context, ccache); + ccache = NULL; + kret = 0; + } else if (handle->principal == NULL) { + kret = krb5_copy_principal(gssapi_krb5_context, def_princ, + &handle->principal); + if (kret) + goto end; + } else if (handle->principal != NULL && + krb5_principal_compare(gssapi_krb5_context, handle->principal, + def_princ) == FALSE) { + /* Before failing, lets check the keytab */ + krb5_free_principal(gssapi_krb5_context, def_princ); + def_princ = NULL; + } + if (def_princ == NULL) { + /* We have no existing credentials cache, + * so attempt to get a TGT using a keytab. + */ + if (handle->principal == NULL) { + kret = krb5_get_default_principal(gssapi_krb5_context, + &handle->principal); + if (kret) + goto end; + } + kret = get_keytab(&keytab); + if (kret) + goto end; + krb5_get_init_creds_opt_init(&opt); + kret = krb5_get_init_creds_keytab(gssapi_krb5_context, &cred, + handle->principal, keytab, 0, NULL, &opt); + if (kret) + goto end; + kret = krb5_cc_gen_new(gssapi_krb5_context, &krb5_mcc_ops, + &ccache); + if (kret) + goto end; + kret = krb5_cc_initialize(gssapi_krb5_context, ccache, cred.client); + if (kret) + goto end; + kret = krb5_cc_store_cred(gssapi_krb5_context, ccache, &cred); + if (kret) + goto end; + handle->lifetime = cred.times.endtime; + } else { + krb5_creds in_cred, *out_cred; + krb5_const_realm realm; + + memset(&in_cred, 0, sizeof(in_cred)); + in_cred.client = handle->principal; + + realm = krb5_principal_get_realm(gssapi_krb5_context, + handle->principal); + if (realm == NULL) { + kret = KRB5_PRINC_NOMATCH; /* XXX */ + goto end; + } + + kret = krb5_make_principal(gssapi_krb5_context, &in_cred.server, + realm, KRB5_TGS_NAME, realm, NULL); + if (kret) + goto end; + + kret = krb5_get_credentials(gssapi_krb5_context, 0, + ccache, &in_cred, &out_cred); + krb5_free_principal(gssapi_krb5_context, in_cred.server); + if (kret) + goto end; + + handle->lifetime = out_cred->times.endtime; + krb5_free_creds(gssapi_krb5_context, out_cred); + } + + handle->ccache = ccache; + ret = GSS_S_COMPLETE; + +end: + if (cred.client != NULL) + krb5_free_creds_contents(gssapi_krb5_context, &cred); + if (def_princ != NULL) + krb5_free_principal(gssapi_krb5_context, def_princ); + if (keytab != NULL) + krb5_kt_close(gssapi_krb5_context, keytab); + if (ret != GSS_S_COMPLETE) { + if (ccache != NULL) + krb5_cc_close(gssapi_krb5_context, ccache); + if (kret != 0) { + *minor_status = kret; + gssapi_krb5_set_error_string (); + } + } + return (ret); +} + +static OM_uint32 acquire_acceptor_cred + (OM_uint32 * minor_status, + const gss_name_t desired_name, + OM_uint32 time_req, + const gss_OID_set desired_mechs, + gss_cred_usage_t cred_usage, + gss_cred_id_t handle, + gss_OID_set * actual_mechs, + OM_uint32 * time_rec + ) +{ + OM_uint32 ret; + krb5_error_code kret; + + kret = 0; + ret = GSS_S_FAILURE; + kret = get_keytab(&handle->keytab); + if (kret) + goto end; + ret = GSS_S_COMPLETE; + +end: + if (ret != GSS_S_COMPLETE) { + if (handle->keytab != NULL) + krb5_kt_close(gssapi_krb5_context, handle->keytab); + if (kret != 0) { + *minor_status = kret; + gssapi_krb5_set_error_string (); + } + } + return (ret); +} + +OM_uint32 gss_acquire_cred + (OM_uint32 * minor_status, + const gss_name_t desired_name, + OM_uint32 time_req, + const gss_OID_set desired_mechs, + gss_cred_usage_t cred_usage, + gss_cred_id_t * output_cred_handle, + gss_OID_set * actual_mechs, + OM_uint32 * time_rec + ) +{ + gss_cred_id_t handle; + OM_uint32 ret; + + GSSAPI_KRB5_INIT (); + + *output_cred_handle = NULL; + if (time_rec) + *time_rec = 0; + if (actual_mechs) + *actual_mechs = GSS_C_NO_OID_SET; + + if (desired_mechs) { + OM_uint32 present = 0; + + ret = gss_test_oid_set_member(minor_status, GSS_KRB5_MECHANISM, + desired_mechs, &present); + if (ret) + return ret; + if (!present) { + *minor_status = 0; + return GSS_S_BAD_MECH; + } + } + + handle = (gss_cred_id_t)malloc(sizeof(*handle)); + if (handle == GSS_C_NO_CREDENTIAL) { + *minor_status = ENOMEM; + return (GSS_S_FAILURE); + } + + memset(handle, 0, sizeof (*handle)); + + if (desired_name != GSS_C_NO_NAME) { + ret = gss_duplicate_name(minor_status, desired_name, + &handle->principal); + if (ret != GSS_S_COMPLETE) { + free(handle); + return (ret); + } + } + if (cred_usage == GSS_C_INITIATE || cred_usage == GSS_C_BOTH) { + ret = acquire_initiator_cred(minor_status, desired_name, time_req, + desired_mechs, cred_usage, handle, actual_mechs, time_rec); + if (ret != GSS_S_COMPLETE) { + free(handle); + return (ret); + } + } else if (cred_usage == GSS_C_ACCEPT || cred_usage == GSS_C_BOTH) { + ret = acquire_acceptor_cred(minor_status, desired_name, time_req, + desired_mechs, cred_usage, handle, actual_mechs, time_rec); + if (ret != GSS_S_COMPLETE) { + free(handle); + return (ret); + } + } else { + free(handle); + *minor_status = GSS_KRB5_S_G_BAD_USAGE; + return GSS_S_FAILURE; + } + ret = gss_create_empty_oid_set(minor_status, &handle->mechanisms); + if (ret == GSS_S_COMPLETE) + ret = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM, + &handle->mechanisms); + if (ret == GSS_S_COMPLETE) + ret = gss_inquire_cred(minor_status, handle, NULL, time_rec, NULL, + actual_mechs); + if (ret != GSS_S_COMPLETE) { + if (handle->mechanisms != NULL) + gss_release_oid_set(NULL, &handle->mechanisms); + free(handle); + return (ret); + } + *minor_status = 0; + if (time_rec) + *time_rec = handle->lifetime; + handle->usage = cred_usage; + *output_cred_handle = handle; + return (GSS_S_COMPLETE); +} |
