/** * @file cert_payload.c * * @brief Implementation of cert_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 "cert_payload.h" #include /** * String mappings for cert_encoding_t. */ mapping_t cert_encoding_m[] = { {PKCS7_WRAPPED_X509_CERTIFICATE, "PKCS7_WRAPPED_X509_CERTIFICATE"}, {PGP_CERTIFICATE, "PGP_CERTIFICATE"}, {DNS_SIGNED_KEY, "DNS_SIGNED_KEY"}, {X509_CERTIFICATE_SIGNATURE, "X509_CERTIFICATE_SIGNATURE"}, {KERBEROS_TOKEN, "KERBEROS_TOKEN"}, {CERTIFICATE_REVOCATION_LIST, "CERTIFICATE_REVOCATION_LIST"}, {AUTHORITY_REVOCATION_LIST, "AUTHORITY_REVOCATION_LIST"}, {SPKI_CERTIFICATE, "SPKI_CERTIFICATE"}, {X509_CERTIFICATE_ATTRIBUTE, "X509_CERTIFICATE_ATTRIBUTE"}, {RAW_SA_KEY, "RAW_SA_KEY"}, {HASH_AND_URL_X509_CERTIFICATE, "HASH_AND_URL_X509_CERTIFICATE"}, {HASH_AND_URL_X509_BUNDLE, "HASH_AND_URL_X509_BUNDLE"}, {MAPPING_END, NULL} }; typedef struct private_cert_payload_t private_cert_payload_t; /** * Private data of an cert_payload_t object. * */ struct private_cert_payload_t { /** * Public cert_payload_t interface. */ cert_payload_t public; /** * Next payload type. */ u_int8_t next_payload; /** * Critical flag. */ bool critical; /** * Length of this payload. */ u_int16_t payload_length; /** * Encoding of the CERT Data. */ u_int8_t cert_encoding; /** * The contained cert data value. */ chunk_t cert_data; }; /** * Encoding rules to parse or generate a CERT payload * * The defined offsets are the positions in a object of type * private_cert_payload_t. * */ encoding_rule_t cert_payload_encodings[] = { /* 1 Byte next payload type, stored in the field next_payload */ { U_INT_8, offsetof(private_cert_payload_t, next_payload) }, /* the critical bit */ { FLAG, offsetof(private_cert_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_cert_payload_t, payload_length)}, /* 1 Byte CERT type*/ { U_INT_8, offsetof(private_cert_payload_t, cert_encoding) }, /* some cert data bytes, length is defined in PAYLOAD_LENGTH */ { CERT_DATA, offsetof(private_cert_payload_t, cert_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 ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! Cert Encoding ! ! +-+-+-+-+-+-+-+-+ ! ~ Certificate Data ~ ! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ /** * Implementation of payload_t.verify. */ static status_t verify(private_cert_payload_t *this) { if (this->critical) { /* critical bit is set! */ return FAILED; } if ((this->cert_encoding == 0) || ((this->cert_encoding >= 14) && (this->cert_encoding <= 200))) { /* reserved IDs */ return FAILED; } return SUCCESS; } /** * Implementation of cert_payload_t.get_encoding_rules. */ static void get_encoding_rules(private_cert_payload_t *this, encoding_rule_t **rules, size_t *rule_count) { *rules = cert_payload_encodings; *rule_count = sizeof(cert_payload_encodings) / sizeof(encoding_rule_t); } /** * Implementation of payload_t.get_type. */ static payload_type_t get_payload_type(private_cert_payload_t *this) { return CERTIFICATE; } /** * Implementation of payload_t.get_next_type. */ static payload_type_t get_next_type(private_cert_payload_t *this) { return (this->next_payload); } /** * Implementation of payload_t.set_next_type. */ static void set_next_type(private_cert_payload_t *this,payload_type_t type) { this->next_payload = type; } /** * Implementation of payload_t.get_length. */ static size_t get_length(private_cert_payload_t *this) { return this->payload_length; } /** * Implementation of cert_payload_t.set_cert_encoding. */ static void set_cert_encoding (private_cert_payload_t *this, cert_encoding_t encoding) { this->cert_encoding = encoding; } /** * Implementation of cert_payload_t.get_cert_encoding. */ static cert_encoding_t get_cert_encoding (private_cert_payload_t *this) { return (this->cert_encoding); } /** * Implementation of cert_payload_t.set_data. */ static void set_data (private_cert_payload_t *this, chunk_t data) { if (this->cert_data.ptr != NULL) { allocator_free_chunk(&(this->cert_data)); } this->cert_data.ptr = allocator_clone_bytes(data.ptr,data.len); this->cert_data.len = data.len; this->payload_length = CERT_PAYLOAD_HEADER_LENGTH + this->cert_data.len; } /** * Implementation of cert_payload_t.get_data. */ static chunk_t get_data (private_cert_payload_t *this) { return (this->cert_data); } /** * Implementation of cert_payload_t.get_data_clone. */ static chunk_t get_data_clone (private_cert_payload_t *this) { chunk_t cloned_data; if (this->cert_data.ptr == NULL) { return (this->cert_data); } cloned_data.ptr = allocator_clone_bytes(this->cert_data.ptr,this->cert_data.len); cloned_data.len = this->cert_data.len; return cloned_data; } /** * Implementation of payload_t.destroy and cert_payload_t.destroy. */ static void destroy(private_cert_payload_t *this) { if (this->cert_data.ptr != NULL) { allocator_free_chunk(&(this->cert_data)); } allocator_free(this); } /* * Described in header */ cert_payload_t *cert_payload_create() { private_cert_payload_t *this = allocator_alloc_thing(private_cert_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 (*) (cert_payload_t *)) destroy; this->public.set_cert_encoding = (void (*) (cert_payload_t *,cert_encoding_t)) set_cert_encoding; this->public.get_cert_encoding = (cert_encoding_t (*) (cert_payload_t *)) get_cert_encoding; this->public.set_data = (void (*) (cert_payload_t *,chunk_t)) set_data; this->public.get_data_clone = (chunk_t (*) (cert_payload_t *)) get_data_clone; this->public.get_data = (chunk_t (*) (cert_payload_t *)) get_data; /* private variables */ this->critical = FALSE; this->next_payload = NO_PAYLOAD; this->payload_length =CERT_PAYLOAD_HEADER_LENGTH; this->cert_data = CHUNK_INITIALIZER; return (&(this->public)); }