diff options
Diffstat (limited to 'source4/heimdal/lib/gssapi/mech/gss_cred.c')
| -rw-r--r-- | source4/heimdal/lib/gssapi/mech/gss_cred.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/source4/heimdal/lib/gssapi/mech/gss_cred.c b/source4/heimdal/lib/gssapi/mech/gss_cred.c new file mode 100644 index 0000000000..66df50b55e --- /dev/null +++ b/source4/heimdal/lib/gssapi/mech/gss_cred.c @@ -0,0 +1,224 @@ +/* + * Copyright (c) 2009 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 KTH 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 KTH AND ITS 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 KTH OR ITS 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 "mech_locl.h" +#include <krb5.h> + +/* + * format: any number of: + * mech-len: int32 + * mech-data: char * (not alligned) + * cred-len: int32 + * cred-data char * (not alligned) +*/ + +OM_uint32 GSSAPI_LIB_FUNCTION +gss_export_cred(OM_uint32 * minor_status, + gss_cred_id_t cred_handle, + gss_buffer_t token) +{ + struct _gss_cred *cred = (struct _gss_cred *)cred_handle; + struct _gss_mechanism_cred *mc; + gss_buffer_desc buffer; + krb5_error_code ret; + krb5_storage *sp; + OM_uint32 major; + krb5_data data; + + _mg_buffer_zero(token); + + if (cred == NULL) { + *minor_status = 0; + return GSS_S_NO_CRED; + } + + SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) { + if (mc->gmc_mech->gm_export_cred == NULL) { + *minor_status = 0; + return GSS_S_NO_CRED; + } + } + + sp = krb5_storage_emem(); + if (sp == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + + SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) { + + major = mc->gmc_mech->gm_export_cred(minor_status, + mc->gmc_cred, &buffer); + if (major) { + krb5_storage_free(sp); + return major; + } + + ret = krb5_storage_write(sp, buffer.value, buffer.length); + if (ret != buffer.length) { + gss_release_buffer(minor_status, &buffer); + krb5_storage_free(sp); + *minor_status = EINVAL; + return GSS_S_FAILURE; + } + gss_release_buffer(minor_status, &buffer); + } + + ret = krb5_storage_to_data(sp, &data); + krb5_storage_free(sp); + if (ret) { + *minor_status = ret; + return GSS_S_FAILURE; + } + + token->value = data.data; + token->length = data.length; + + return GSS_S_COMPLETE; +} + +OM_uint32 GSSAPI_LIB_FUNCTION +gss_import_cred(OM_uint32 * minor_status, + gss_buffer_t token, + gss_cred_id_t * cred_handle) +{ + gssapi_mech_interface m; + krb5_error_code ret; + struct _gss_cred *cred; + krb5_storage *sp = NULL; + OM_uint32 major, junk; + krb5_data data; + + *cred_handle = GSS_C_NO_CREDENTIAL; + + if (token->length == 0) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + + sp = krb5_storage_from_readonly_mem(token->value, token->length); + if (sp == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + + cred = calloc(1, sizeof(struct _gss_cred)); + if (cred == NULL) { + krb5_storage_free(sp); + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + SLIST_INIT(&cred->gc_mc); + + *cred_handle = (gss_cred_id_t)cred; + + while(1) { + struct _gss_mechanism_cred *mc; + gss_buffer_desc buffer; + gss_cred_id_t mcred; + gss_OID_desc oid; + + ret = krb5_ret_data(sp, &data); + if (ret == HEIM_ERR_EOF) { + break; + } else if (ret) { + *minor_status = ret; + major = GSS_S_FAILURE; + goto out; + } + oid.elements = data.data; + oid.length = data.length; + + m = __gss_get_mechanism(&oid); + krb5_data_free(&data); + if (!m) { + *minor_status = 0; + major = GSS_S_BAD_MECH; + goto out; + } + + if (m->gm_import_cred == NULL) { + *minor_status = 0; + major = GSS_S_BAD_MECH; + goto out; + } + + ret = krb5_ret_data(sp, &data); + if (ret) { + *minor_status = ret; + major = GSS_S_FAILURE; + goto out; + } + + buffer.value = data.data; + buffer.length = data.length; + + major = m->gm_import_cred(minor_status, + &buffer, &mcred); + krb5_data_free(&data); + if (major) { + goto out; + } + + mc = malloc(sizeof(struct _gss_mechanism_cred)); + if (mc == NULL) { + *minor_status = EINVAL; + major = GSS_S_FAILURE; + goto out; + } + + mc->gmc_mech = m; + mc->gmc_mech_oid = &m->gm_mech_oid; + mc->gmc_cred = mcred; + + SLIST_INSERT_HEAD(&cred->gc_mc, mc, gmc_link); + } + krb5_storage_free(sp); + sp = NULL; + + if (SLIST_EMPTY(&cred->gc_mc)) { + major = GSS_S_NO_CRED; + goto out; + } + + return GSS_S_COMPLETE; + + out: + if (sp) + krb5_storage_free(sp); + + gss_release_cred(&junk, cred_handle); + + return major; + +} |