Martin Willi
db7ef62494
centralized all printf specifier character definitions reuse of arginfo handlers more cleanups fixed more AMD64 issues added DEBUG_LEVEL compile flag to exclude DBGn() statements
322 lines
8.8 KiB
C
322 lines
8.8 KiB
C
/**
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* @file certreq_payload.c
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*
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* @brief Implementation of certreq_payload_t.
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*
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*/
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/*
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <stddef.h>
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#include <string.h>
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#include <daemon.h>
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#include <crypto/hashers/hasher.h>
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#include "certreq_payload.h"
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typedef struct private_certreq_payload_t private_certreq_payload_t;
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/**
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* Private data of an certreq_payload_t object.
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*
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*/
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struct private_certreq_payload_t {
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/**
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* Public certreq_payload_t interface.
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*/
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certreq_payload_t public;
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/**
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* Next payload type.
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*/
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u_int8_t next_payload;
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/**
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* Critical flag.
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*/
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bool critical;
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/**
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* Length of this payload.
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*/
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u_int16_t payload_length;
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/**
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* Encoding of the CERT Data.
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*/
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u_int8_t cert_encoding;
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/**
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* The contained certreq data value.
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*/
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chunk_t certreq_data;
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};
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/**
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* Encoding rules to parse or generate a CERTREQ payload
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*
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* The defined offsets are the positions in a object of type
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* private_certreq_payload_t.
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*
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*/
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encoding_rule_t certreq_payload_encodings[] = {
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/* 1 Byte next payload type, stored in the field next_payload */
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{ U_INT_8, offsetof(private_certreq_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_certreq_payload_t, critical) },
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/* 7 Bit reserved bits, nowhere stored */
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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/* Length of the whole payload*/
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{ PAYLOAD_LENGTH, offsetof(private_certreq_payload_t, payload_length)},
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/* 1 Byte CERTREQ type*/
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{ U_INT_8, offsetof(private_certreq_payload_t, cert_encoding)},
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/* some certreq data bytes, length is defined in PAYLOAD_LENGTH */
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{ CERTREQ_DATA, offsetof(private_certreq_payload_t, certreq_data)}
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};
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/*
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1 2 3
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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
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Next Payload !C! RESERVED ! Payload Length !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Cert Encoding ! !
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+-+-+-+-+-+-+-+-+ !
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~ Certification Authority ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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/**
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* Implementation of payload_t.verify.
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*/
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static status_t verify(private_certreq_payload_t *this)
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{
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if ((this->cert_encoding == 0) ||
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((this->cert_encoding >= 14) && (this->cert_encoding <= 200)))
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{
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/* reserved IDs */
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return FAILED;
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}
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return SUCCESS;
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}
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/**
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* Implementation of certreq_payload_t.get_encoding_rules.
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*/
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static void get_encoding_rules(private_certreq_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
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{
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*rules = certreq_payload_encodings;
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*rule_count = sizeof(certreq_payload_encodings) / sizeof(encoding_rule_t);
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}
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/**
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* Implementation of payload_t.get_type.
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*/
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static payload_type_t get_payload_type(private_certreq_payload_t *this)
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{
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return CERTIFICATE_REQUEST;
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}
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/**
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* Implementation of payload_t.get_next_type.
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*/
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static payload_type_t get_next_type(private_certreq_payload_t *this)
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{
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return (this->next_payload);
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}
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/**
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* Implementation of payload_t.set_next_type.
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*/
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static void set_next_type(private_certreq_payload_t *this,payload_type_t type)
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{
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this->next_payload = type;
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}
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/**
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* Implementation of payload_t.get_length.
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*/
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static size_t get_length(private_certreq_payload_t *this)
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{
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return this->payload_length;
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}
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/**
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* Implementation of certreq_payload_t.set_cert_encoding.
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*/
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static void set_cert_encoding (private_certreq_payload_t *this, cert_encoding_t encoding)
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{
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this->cert_encoding = encoding;
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}
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/**
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* Implementation of certreq_payload_t.get_cert_encoding.
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*/
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static cert_encoding_t get_cert_encoding (private_certreq_payload_t *this)
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{
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return (this->cert_encoding);
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}
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/**
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* Implementation of certreq_payload_t.set_data.
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*/
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static void set_data (private_certreq_payload_t *this, chunk_t data)
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{
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if (this->certreq_data.ptr != NULL)
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{
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chunk_free(&(this->certreq_data));
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}
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this->certreq_data.ptr = clalloc(data.ptr,data.len);
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this->certreq_data.len = data.len;
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this->payload_length = CERTREQ_PAYLOAD_HEADER_LENGTH + this->certreq_data.len;
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}
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/**
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* Implementation of certreq_payload_t.get_data.
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*/
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static chunk_t get_data (private_certreq_payload_t *this)
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{
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return (this->certreq_data);
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}
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/**
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* Implementation of certreq_payload_t.get_data_clone.
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*/
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static chunk_t get_data_clone (private_certreq_payload_t *this)
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{
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chunk_t cloned_data;
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if (this->certreq_data.ptr == NULL)
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{
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return (this->certreq_data);
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}
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cloned_data.ptr = clalloc(this->certreq_data.ptr,this->certreq_data.len);
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cloned_data.len = this->certreq_data.len;
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return cloned_data;
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}
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/**
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* Implementation of payload_t.destroy and certreq_payload_t.destroy.
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*/
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static void destroy(private_certreq_payload_t *this)
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{
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if (this->certreq_data.ptr != NULL)
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{
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chunk_free(&(this->certreq_data));
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}
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free(this);
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}
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/*
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* Described in header
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*/
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certreq_payload_t *certreq_payload_create()
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{
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private_certreq_payload_t *this = malloc_thing(private_certreq_payload_t);
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/* interface functions */
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this->public.payload_interface.verify = (status_t (*) (payload_t*))verify;
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this->public.payload_interface.get_encoding_rules = (void (*) (payload_t*,encoding_rule_t**,size_t*))get_encoding_rules;
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this->public.payload_interface.get_length = (size_t (*) (payload_t*))get_length;
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this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t*))get_next_type;
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this->public.payload_interface.set_next_type = (void (*) (payload_t*,payload_type_t))set_next_type;
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this->public.payload_interface.get_type = (payload_type_t (*) (payload_t*))get_payload_type;
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this->public.payload_interface.destroy = (void (*) (payload_t*))destroy;
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/* public functions */
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this->public.destroy = (void (*) (certreq_payload_t*)) destroy;
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this->public.set_cert_encoding = (void (*) (certreq_payload_t*,cert_encoding_t))set_cert_encoding;
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this->public.get_cert_encoding = (cert_encoding_t (*) (certreq_payload_t*))get_cert_encoding;
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this->public.set_data = (void (*) (certreq_payload_t*,chunk_t))set_data;
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this->public.get_data_clone = (chunk_t (*) (certreq_payload_t*))get_data_clone;
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this->public.get_data = (chunk_t (*) (certreq_payload_t*))get_data;
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/* private variables */
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this->critical = FALSE;
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this->next_payload = NO_PAYLOAD;
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this->payload_length =CERTREQ_PAYLOAD_HEADER_LENGTH;
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this->certreq_data = chunk_empty;
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return (&(this->public));
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}
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/*
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* Described in header
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*/
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certreq_payload_t *certreq_payload_create_from_cacert(identification_t *id)
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{
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x509_t *cacert = charon->credentials->get_ca_certificate(charon->credentials, id);
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rsa_public_key_t *pubkey = cacert->get_public_key(cacert);
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chunk_t keyid = pubkey->get_keyid(pubkey);
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certreq_payload_t *this = certreq_payload_create();
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DBG2(DBG_IKE, "requesting certificate issued by '%D'", id);
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DBG2(DBG_IKE, " with keyid %#B", &keyid);
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this->set_cert_encoding(this, CERT_X509_SIGNATURE);
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this->set_data(this, keyid);
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return this;
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}
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/*
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* Described in header
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*/
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certreq_payload_t *certreq_payload_create_from_cacerts(void)
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{
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certreq_payload_t *this;
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chunk_t keyids;
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u_char *pos;
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x509_t *cacert;
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iterator_t *iterator = charon->credentials->create_cacert_iterator(charon->credentials);
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int count = iterator->get_count(iterator);
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if (count == 0)
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return NULL;
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this = certreq_payload_create();
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keyids = chunk_alloc(count * HASH_SIZE_SHA1);
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pos = keyids.ptr;
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while (iterator->iterate(iterator, (void**)&cacert))
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{
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rsa_public_key_t *pubkey = cacert->get_public_key(cacert);
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chunk_t keyid = pubkey->get_keyid(pubkey);
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DBG2(DBG_IKE, "requesting certificate issued by '%D'", cacert->get_subject(cacert));
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DBG2(DBG_IKE, " with keyid %#B", &keyid);
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memcpy(pos, keyid.ptr, keyid.len);
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pos += HASH_SIZE_SHA1;
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}
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iterator->destroy(iterator);
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this->set_cert_encoding(this, CERT_X509_SIGNATURE);
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this->set_data(this, keyids);
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free(keyids.ptr);
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return this;
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}
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