/** * @file auth_payload.h * * @brief Implementation of auth_payload_t. * */ /* * Copyright (C) 2005 Jan Hutter, Martin Willi * Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. See . * * 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 General Public License * for more details. */ #include "auth_payload.h" #include #include /** * String mappings for auth_method_t. */ mapping_t auth_method_m[] = { {RSA_DIGITAL_SIGNATURE, "RSA_DIGITAL_SIGNATURE"}, {SHARED_KEY_MESSAGE_INTEGRITY_CODE, "SHARED_KEY_MESSAGE_INTEGRITY_CODE"}, {DSS_DIGITAL_SIGNATURE, "DSS_DIGITAL_SIGNATURE"}, {MAPPING_END, NULL} }; typedef struct private_auth_payload_t private_auth_payload_t; /** * Private data of an auth_payload_t object. * */ struct private_auth_payload_t { /** * Public auth_payload_t interface. */ auth_payload_t public; /** * Next payload type. */ u_int8_t next_payload; /** * Critical flag. */ bool critical; /** * Length of this payload. */ u_int16_t payload_length; /** * Method of the AUTH Data. */ u_int8_t auth_method; /** * The contained auth data value. */ chunk_t auth_data; }; /** * Encoding rules to parse or generate a AUTH payload * * The defined offsets are the positions in a object of type * private_auth_payload_t. * */ encoding_rule_t auth_payload_encodings[] = { /* 1 Byte next payload type, stored in the field next_payload */ { U_INT_8, offsetof(private_auth_payload_t, next_payload) }, /* the critical bit */ { FLAG, offsetof(private_auth_payload_t, critical) }, /* 7 Bit reserved bits, nowhere stored */ { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, /* Length of the whole payload*/ { PAYLOAD_LENGTH, offsetof(private_auth_payload_t, payload_length)}, /* 1 Byte AUTH type*/ { U_INT_8, offsetof(private_auth_payload_t, auth_method) }, /* 3 reserved bytes */ { RESERVED_BYTE, 0 }, { RESERVED_BYTE, 0 }, { RESERVED_BYTE, 0 }, /* some auth data bytes, length is defined in PAYLOAD_LENGTH */ { AUTH_DATA, offsetof(private_auth_payload_t, auth_data) } }; /* 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! Next Payload !C! RESERVED ! Payload Length ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! Auth Method ! RESERVED ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! ! ~ Authentication Data ~ ! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ /** * Implementation of payload_t.verify. */ static status_t verify(private_auth_payload_t *this) { if (this->critical) { /* critical bit is set! */ return FAILED; } if ((this->auth_method == 0) || ((this->auth_method >= 4) && (this->auth_method <= 200))) { /* reserved IDs */ return FAILED; } return SUCCESS; } /** * Implementation of auth_payload_t.get_encoding_rules. */ static void get_encoding_rules(private_auth_payload_t *this, encoding_rule_t **rules, size_t *rule_count) { *rules = auth_payload_encodings; *rule_count = sizeof(auth_payload_encodings) / sizeof(encoding_rule_t); } /** * Implementation of payload_t.get_type. */ static payload_type_t get_payload_type(private_auth_payload_t *this) { return AUTHENTICATION; } /** * Implementation of payload_t.get_next_type. */ static payload_type_t get_next_type(private_auth_payload_t *this) { return (this->next_payload); } /** * Implementation of payload_t.set_next_type. */ static void set_next_type(private_auth_payload_t *this,payload_type_t type) { this->next_payload = type; } /** * Implementation of payload_t.get_length. */ static size_t get_length(private_auth_payload_t *this) { return this->payload_length; } /** * Implementation of auth_payload_t.set_auth_method. */ static void set_auth_method (private_auth_payload_t *this, auth_method_t method) { this->auth_method = method; } /** * Implementation of auth_payload_t.get_auth_method. */ static auth_method_t get_auth_method (private_auth_payload_t *this) { return (this->auth_method); } /** * Implementation of auth_payload_t.set_data. */ static void set_data (private_auth_payload_t *this, chunk_t data) { if (this->auth_data.ptr != NULL) { allocator_free_chunk(&(this->auth_data)); } this->auth_data.ptr = allocator_clone_bytes(data.ptr,data.len); this->auth_data.len = data.len; this->payload_length = AUTH_PAYLOAD_HEADER_LENGTH + this->auth_data.len; } /** * Implementation of auth_payload_t.get_data. */ static chunk_t get_data (private_auth_payload_t *this) { return (this->auth_data); } /** * Implementation of auth_payload_t.get_data_clone. */ static chunk_t get_data_clone (private_auth_payload_t *this) { chunk_t cloned_data; if (this->auth_data.ptr == NULL) { return (this->auth_data); } cloned_data.ptr = allocator_clone_bytes(this->auth_data.ptr,this->auth_data.len); cloned_data.len = this->auth_data.len; return cloned_data; } /** * Implementation of payload_t.destroy and auth_payload_t.destroy. */ static void destroy(private_auth_payload_t *this) { if (this->auth_data.ptr != NULL) { allocator_free_chunk(&(this->auth_data)); } allocator_free(this); } /* * Described in header */ auth_payload_t *auth_payload_create() { private_auth_payload_t *this = allocator_alloc_thing(private_auth_payload_t); /* interface functions */ this->public.payload_interface.verify = (status_t (*) (payload_t *))verify; this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules; this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length; this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type; this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type; this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_payload_type; this->public.payload_interface.destroy = (void (*) (payload_t *))destroy; /* public functions */ this->public.destroy = (void (*) (auth_payload_t *)) destroy; this->public.set_auth_method = (void (*) (auth_payload_t *,auth_method_t)) set_auth_method; this->public.get_auth_method = (auth_method_t (*) (auth_payload_t *)) get_auth_method; this->public.set_data = (void (*) (auth_payload_t *,chunk_t)) set_data; this->public.get_data_clone = (chunk_t (*) (auth_payload_t *)) get_data_clone; this->public.get_data = (chunk_t (*) (auth_payload_t *)) get_data; /* private variables */ this->critical = FALSE; this->next_payload = NO_PAYLOAD; this->payload_length =AUTH_PAYLOAD_HEADER_LENGTH; this->auth_data = CHUNK_INITIALIZER; return (&(this->public)); }