diff options
Diffstat (limited to 'src/sss_client')
| -rw-r--r-- | src/sss_client/krb5_authdata_int.h | 185 | ||||
| -rw-r--r-- | src/sss_client/sssd_pac.c | 282 |
2 files changed, 467 insertions, 0 deletions
diff --git a/src/sss_client/krb5_authdata_int.h b/src/sss_client/krb5_authdata_int.h new file mode 100644 index 00000000..5e0cf5e0 --- /dev/null +++ b/src/sss_client/krb5_authdata_int.h @@ -0,0 +1,185 @@ +/* + SSSD - MIT Kerberos authdata plugin + + This file contains definitions and declarations to build authdata plugins + for MIT Kerberos outside of the MIT Kerberos source tree. +*/ + +#ifndef _KRB5_AUTHDATA_INT_H +#define _KRB5_AUTHDATA_INT_H + +krb5_error_code KRB5_CALLCONV +krb5_ser_pack_int32(krb5_int32, krb5_octet **, size_t *); + +krb5_error_code KRB5_CALLCONV +krb5_ser_unpack_int32(krb5_int32 *, krb5_octet **, size_t *); + +krb5_error_code KRB5_CALLCONV +krb5_ser_pack_bytes(krb5_octet *, size_t, krb5_octet **, size_t *); + +#define AD_USAGE_AS_REQ 0x01 +#define AD_USAGE_TGS_REQ 0x02 +#define AD_USAGE_AP_REQ 0x04 +#define AD_USAGE_KDC_ISSUED 0x08 +#define AD_USAGE_MASK 0x0F +#define AD_INFORMATIONAL 0x10 + +struct _krb5_authdata_context; +typedef struct _krb5_authdata_context *krb5_authdata_context; + +typedef void +(*authdata_client_plugin_flags_proc)(krb5_context kcontext, + void *plugin_context, + krb5_authdatatype ad_type, + krb5_flags *flags); + +typedef krb5_error_code +(*authdata_client_plugin_init_proc)(krb5_context context, + void **plugin_context); +typedef void +(*authdata_client_plugin_fini_proc)(krb5_context kcontext, + void *plugin_context); + +typedef krb5_error_code +(*authdata_client_request_init_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void **request_context); + +typedef void +(*authdata_client_request_fini_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context); + +typedef krb5_error_code +(*authdata_client_import_authdata_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_authdata **authdata, + krb5_boolean kdc_issued_flag, + krb5_const_principal issuer); + +typedef krb5_error_code +(*authdata_client_export_authdata_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_flags usage, + krb5_authdata ***authdata); + +typedef krb5_error_code +(*authdata_client_get_attribute_types_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_data **attrs); + +typedef krb5_error_code +(*authdata_client_get_attribute_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + const krb5_data *attribute, + krb5_boolean *authenticated, + krb5_boolean *complete, + krb5_data *value, + krb5_data *display_value, + int *more); + +typedef krb5_error_code +(*authdata_client_set_attribute_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_boolean complete, + const krb5_data *attribute, + const krb5_data *value); + +typedef krb5_error_code +(*authdata_client_delete_attribute_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + const krb5_data *attribute); + +typedef krb5_error_code +(*authdata_client_export_internal_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_boolean restrict_authenticated, + void **ptr); + +typedef void +(*authdata_client_free_internal_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + void *ptr); + +typedef krb5_error_code +(*authdata_client_verify_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + const krb5_auth_context *auth_context, + const krb5_keyblock *key, + const krb5_ap_req *req); + +typedef krb5_error_code +(*authdata_client_size_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + size_t *sizep); + +typedef krb5_error_code +(*authdata_client_externalize_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_octet **buffer, + size_t *lenremain); + +typedef krb5_error_code +(*authdata_client_internalize_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + krb5_octet **buffer, + size_t *lenremain); + +typedef krb5_error_code +(*authdata_client_copy_proc)(krb5_context kcontext, + struct _krb5_authdata_context *context, + void *plugin_context, + void *request_context, + void *dst_plugin_context, + void *dst_request_context); + +typedef struct krb5plugin_authdata_client_ftable_v0 { + char *name; + krb5_authdatatype *ad_type_list; + authdata_client_plugin_init_proc init; + authdata_client_plugin_fini_proc fini; + authdata_client_plugin_flags_proc flags; + authdata_client_request_init_proc request_init; + authdata_client_request_fini_proc request_fini; + authdata_client_get_attribute_types_proc get_attribute_types; + authdata_client_get_attribute_proc get_attribute; + authdata_client_set_attribute_proc set_attribute; + authdata_client_delete_attribute_proc delete_attribute; + authdata_client_export_authdata_proc export_authdata; + authdata_client_import_authdata_proc import_authdata; + authdata_client_export_internal_proc export_internal; + authdata_client_free_internal_proc free_internal; + authdata_client_verify_proc verify; + authdata_client_size_proc size; + authdata_client_externalize_proc externalize; + authdata_client_internalize_proc internalize; + authdata_client_copy_proc copy; /* optional */ +} krb5plugin_authdata_client_ftable_v0; + +#endif /* _KRB5_AUTHDATA_INT_H */ diff --git a/src/sss_client/sssd_pac.c b/src/sss_client/sssd_pac.c new file mode 100644 index 00000000..cbcfe1d9 --- /dev/null +++ b/src/sss_client/sssd_pac.c @@ -0,0 +1,282 @@ +/* + Authors: + Sumit Bose <sbose@redhat.com> + + Copyright (C) 2011 Red Hat + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +/* A short documentation about authdata plugins can be found in + * http://http://k5wiki.kerberos.org/wiki/Projects/VerifyAuthData */ + +#include <krb5/krb5.h> +#include <errno.h> + +#include "krb5_authdata_int.h" +#include "sss_cli.h" + + +struct sssd_context { + krb5_data data; +}; + +static krb5_error_code +sssdpac_init(krb5_context kcontext, void **plugin_context) +{ + *plugin_context = NULL; + return 0; +} + +static void +sssdpac_flags(krb5_context kcontext, + void *plugin_context, + krb5_authdatatype ad_type, + krb5_flags *flags) +{ + *flags = AD_USAGE_KDC_ISSUED | AD_INFORMATIONAL | AD_USAGE_TGS_REQ; +} + +static void +sssdpac_fini(krb5_context kcontext, void *plugin_context) +{ + return; +} + +static krb5_error_code +sssdpac_request_init(krb5_context kcontext, + krb5_authdata_context context, + void *plugin_context, + void **request_context) +{ + struct sssd_context *sssdctx; + + sssdctx = (struct sssd_context *)calloc(1, sizeof(*sssdctx)); + if (sssdctx == NULL) { + return ENOMEM; + } + + *request_context = sssdctx; + + return 0; +} + +static krb5_error_code +sssdpac_import_authdata(krb5_context kcontext, + krb5_authdata_context context, + void *plugin_context, + void *request_context, + krb5_authdata **authdata, + krb5_boolean kdc_issued, + krb5_const_principal kdc_issuer) +{ + struct sss_cli_req_data sss_data; + int ret; + uint8_t *repbuf; + size_t replen; + int errnop; + char *data = NULL; + struct sssd_context *sssdctx = (struct sssd_context *)request_context; + + if (authdata[0] == NULL) { + return EINVAL; + } + + sss_data.len = authdata[0]->length; + sss_data.data = authdata[0]->contents; + + ret = sss_pac_make_request(SSS_PAC_ADD_PAC_USER, &sss_data, + &repbuf, &replen, &errnop); + if (ret != 0) { + /* Ignore the error */ + } + + if (authdata[0]->length > 0) { + data = malloc(sizeof(char) * authdata[0]->length); + if (data == NULL) { + return ENOMEM; + } + memcpy(data, authdata[0]->contents, authdata[0]->length); + } + + if (sssdctx->data.data != NULL) { + krb5_free_data_contents(kcontext, &sssdctx->data); + } + + sssdctx->data.length = authdata[0]->length; + sssdctx->data.data = data; + return 0; +} + +static void +sssdpac_request_fini(krb5_context kcontext, + krb5_authdata_context context, + void *plugin_context, + void *request_context) +{ + struct sssd_context *sssdctx = (struct sssd_context *)request_context; + + if (sssdctx != NULL) { + if (sssdctx->data.data != NULL) { + krb5_free_data_contents(kcontext, &sssdctx->data); + } + + free(sssdctx); + } +} + +static krb5_error_code +sssdpac_size(krb5_context kcontext, + krb5_authdata_context context, + void *plugin_context, + void *request_context, + size_t *sizep) +{ + struct sssd_context *sssdctx = (struct sssd_context *)request_context; + + *sizep += sizeof(krb5_int32); + + *sizep += sssdctx->data.length; + + *sizep += sizeof(krb5_int32); + + return 0; +} + +static krb5_error_code +sssdpac_externalize(krb5_context kcontext, + krb5_authdata_context context, + void *plugin_context, + void *request_context, + krb5_octet **buffer, + size_t *lenremain) +{ + krb5_error_code code = 0; + struct sssd_context *sssdctx = (struct sssd_context *)request_context; + size_t required = 0; + krb5_octet *bp; + size_t remain; + + bp = *buffer; + remain = *lenremain; + + if (sssdctx->data.data != NULL) { + sssdpac_size(kcontext, context, plugin_context, + request_context, &required); + + if (required <= remain) { + krb5_ser_pack_int32((krb5_int32)sssdctx->data.length, + &bp, &remain); + krb5_ser_pack_bytes((krb5_octet *)sssdctx->data.data, + (size_t)sssdctx->data.length, + &bp, &remain); + krb5_ser_pack_int32(0, + &bp, &remain); + } else { + code = ENOMEM; + } + } else { + krb5_ser_pack_int32(0, &bp, &remain); /* length */ + krb5_ser_pack_int32(0, &bp, &remain); /* verified */ + } + + *buffer = bp; + *lenremain = remain; + + return code; +} + +static krb5_error_code +sssdpac_internalize(krb5_context kcontext, + krb5_authdata_context context, + void *plugin_context, + void *request_context, + krb5_octet **buffer, + size_t *lenremain) +{ + struct sssd_context *sssdctx = (struct sssd_context *)request_context; + krb5_error_code code; + krb5_int32 ibuf; + krb5_octet *bp; + size_t remain; + krb5_data data; + + bp = *buffer; + remain = *lenremain; + + /* length */ + code = krb5_ser_unpack_int32(&ibuf, &bp, &remain); + if (code != 0) { + return code; + } + + if (ibuf != 0) { + + data.length = ibuf; + data.data = malloc(sizeof(char) * ibuf); + if (data.data == NULL) { + return ENOMEM; + } + memcpy(data.data, bp, ibuf); + + bp += ibuf; + remain -= ibuf; + } else { + data.length = 0; + data.data = NULL; + } + + /* verified */ + code = krb5_ser_unpack_int32(&ibuf, &bp, &remain); + if (code != 0) { + return code; + } + + if (sssdctx->data.data != NULL) { + krb5_free_data_contents(kcontext, &sssdctx->data); + } + + sssdctx->data.length = data.length; + sssdctx->data.data = data.data; + + *buffer = bp; + *lenremain = remain; + + return 0; +} + +static krb5_authdatatype sssdpac_ad_types[] = { KRB5_AUTHDATA_WIN2K_PAC, 0 }; + +krb5plugin_authdata_client_ftable_v0 authdata_client_0 = { + ((void *)((uintptr_t)("sssd_sssdpac"))), + sssdpac_ad_types, + sssdpac_init, + sssdpac_fini, + sssdpac_flags, + sssdpac_request_init, + sssdpac_request_fini, + NULL, + NULL, + NULL, + NULL, + NULL, + sssdpac_import_authdata, + NULL, + NULL, + NULL, + sssdpac_size, + sssdpac_externalize, + sssdpac_internalize, + NULL +}; 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