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Moving charon to libcharon.

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This commit is contained in:
Tobias Brunner
2010-03-19 13:34:52 +01:00
parent 7c11d10eb8
commit 08c5572602
480 changed files with 0 additions and 0 deletions
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src/libcharon/encoding/payloads/cert_payload.c
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/*
* Copyright (C) 2008 Tobias Brunner
* Copyright (C) 2005-2007 Martin Willi
* Copyright (C) 2005 Jan Hutter
* 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 <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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 <stddef.h>
#include <ctype.h>
#include <daemon.h>
#include "cert_payload.h"
ENUM(cert_encoding_names, ENC_PKCS7_WRAPPED_X509, ENC_OCSP_CONTENT,
"ENC_PKCS7_WRAPPED_X509",
"ENC_PGP",
"ENC_DNS_SIGNED_KEY",
"ENC_X509_SIGNATURE",
"ENC_X509_KEY_EXCHANGE",
"ENC_KERBEROS_TOKENS",
"ENC_CRL",
"ENC_ARL",
"ENC_SPKI",
"ENC_X509_ATTRIBUTE",
"ENC_RAW_RSA_KEY",
"ENC_X509_HASH_AND_URL",
"ENC_X509_HASH_AND_URL_BUNDLE",
"ENC_OCSP_CONTENT",
);
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 encoding;
/**
* The contained cert data value.
*/
chunk_t data;
/**
* TRUE if the "Hash and URL" data is invalid
*/
bool invalid_hash_and_url;
};
/**
* 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, encoding) },
/* some cert data bytes, length is defined in PAYLOAD_LENGTH */
{ CERT_DATA, offsetof(private_cert_payload_t, 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->encoding == ENC_X509_HASH_AND_URL ||
this->encoding == ENC_X509_HASH_AND_URL_BUNDLE)
{
/* coarse verification of "Hash and URL" encoded certificates */
if (this->data.len <= 20)
{
DBG1(DBG_ENC, "invalid payload length for hash-and-url (%d), ignore",
this->data.len);
this->invalid_hash_and_url = TRUE;
return SUCCESS;
}
int i = 20; /* skipping the hash */
for (; i < this->data.len; ++i)
{
if (this->data.ptr[i] == '\0')
{
/* null terminated, fine */
return SUCCESS;
}
else if (!isprint(this->data.ptr[i]))
{
DBG1(DBG_ENC, "non printable characters in url of hash-and-url"
" encoded certificate payload, ignore");
this->invalid_hash_and_url = TRUE;
return SUCCESS;
}
}
/* URL is not null terminated, correct that */
chunk_t data = chunk_alloc(this->data.len + 1);
memcpy(data.ptr, this->data.ptr, this->data.len);
data.ptr[this->data.len] = '\0';
chunk_free(&this->data);
this->data = data;
}
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.get_cert_encoding.
*/
static cert_encoding_t get_cert_encoding(private_cert_payload_t *this)
{
return this->encoding;
}
/**
* Implementation of cert_payload_t.get_cert.
*/
static certificate_t *get_cert(private_cert_payload_t *this)
{
if (this->encoding != ENC_X509_SIGNATURE)
{
return NULL;
}
return lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_BLOB_ASN1_DER, this->data,
BUILD_END);
}
/**
* Implementation of cert_payload_t.get_hash.
*/
static chunk_t get_hash(private_cert_payload_t *this)
{
chunk_t hash = chunk_empty;
if ((this->encoding != ENC_X509_HASH_AND_URL &&
this->encoding != ENC_X509_HASH_AND_URL_BUNDLE) ||
this->invalid_hash_and_url)
{
return hash;
}
hash.ptr = this->data.ptr;
hash.len = 20;
return hash;
}
/**
* Implementation of cert_payload_t.get_url.
*/
static char *get_url(private_cert_payload_t *this)
{
if ((this->encoding != ENC_X509_HASH_AND_URL &&
this->encoding != ENC_X509_HASH_AND_URL_BUNDLE) ||
this->invalid_hash_and_url)
{
return NULL;
}
return (char*)this->data.ptr + 20;
}
/**
* Implementation of payload_t.destroy and cert_payload_t.destroy.
*/
static void destroy(private_cert_payload_t *this)
{
chunk_free(&this->data);
free(this);
}
/*
* Described in header
*/
cert_payload_t *cert_payload_create()
{
private_cert_payload_t *this = malloc_thing(private_cert_payload_t);
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;
this->public.destroy = (void (*) (cert_payload_t*))destroy;
this->public.get_cert = (certificate_t* (*) (cert_payload_t*))get_cert;
this->public.get_cert_encoding = (cert_encoding_t (*) (cert_payload_t*))get_cert_encoding;
this->public.get_hash = (chunk_t (*) (cert_payload_t*))get_hash;
this->public.get_url = (char* (*) (cert_payload_t*))get_url;
this->critical = FALSE;
this->next_payload = NO_PAYLOAD;
this->payload_length = CERT_PAYLOAD_HEADER_LENGTH;
this->data = chunk_empty;
this->encoding = 0;
this->invalid_hash_and_url = FALSE;
return &this->public;
}
/*
* Described in header
*/
cert_payload_t *cert_payload_create_from_cert(certificate_t *cert)
{
private_cert_payload_t *this = (private_cert_payload_t*)cert_payload_create();
switch (cert->get_type(cert))
{
case CERT_X509:
this->encoding = ENC_X509_SIGNATURE;
break;
default:
DBG1(DBG_ENC, "embedding %N certificate in payload failed",
certificate_type_names, cert->get_type(cert));
free(this);
return NULL;
}
this->data = cert->get_encoding(cert);
this->payload_length = CERT_PAYLOAD_HEADER_LENGTH + this->data.len;
return &this->public;
}
/*
* Described in header
*/
cert_payload_t *cert_payload_create_from_hash_and_url(chunk_t hash, char *url)
{
private_cert_payload_t *this = (private_cert_payload_t*)cert_payload_create();
this->encoding = ENC_X509_HASH_AND_URL;
this->data = chunk_cat("cc", hash, chunk_create(url, strlen(url)));
this->payload_length = CERT_PAYLOAD_HEADER_LENGTH + this->data.len;
return &this->public;
}