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/*
* Copyright (C) 2012 Martin Willi
* Copyright (C) 2012 revosec AG
*
* 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 "pkcs7_data.h"
#include <asn1/asn1.h>
#include <asn1/oid.h>
typedef struct private_pkcs7_data_t private_pkcs7_data_t;
/**
* Private data of a PKCS#7 signed-data container.
*/
struct private_pkcs7_data_t {
/**
* Implements pkcs7_t.
*/
pkcs7_t public;
/**
* Encoded data
*/
chunk_t content;
/**
* Encoded PKCS#7 data
*/
chunk_t encoding;
};
METHOD(container_t, get_type, container_type_t,
private_pkcs7_data_t *this)
{
return CONTAINER_PKCS7_DATA;
}
METHOD(container_t, create_signature_enumerator, enumerator_t*,
private_pkcs7_data_t *this)
{
return enumerator_create_empty();
}
METHOD(container_t, get_data, bool,
private_pkcs7_data_t *this, chunk_t *data)
{
chunk_t chunk;
chunk = this->content;
if (asn1_unwrap(&chunk, &chunk) == ASN1_OCTET_STRING)
{
*data = chunk_clone(chunk);
return TRUE;
}
return FALSE;
}
METHOD(container_t, get_encoding, bool,
private_pkcs7_data_t *this, chunk_t *data)
{
*data = chunk_clone(this->encoding);
return TRUE;
}
METHOD(container_t, destroy, void,
private_pkcs7_data_t *this)
{
free(this->content.ptr);
free(this->encoding.ptr);
free(this);
}
/**
* Create an empty container
*/
static private_pkcs7_data_t* create_empty()
{
private_pkcs7_data_t *this;
INIT(this,
.public = {
.container = {
.get_type = _get_type,
.create_signature_enumerator = _create_signature_enumerator,
.get_data = _get_data,
.get_encoding = _get_encoding,
.destroy = _destroy,
},
.get_attribute = (void*)return_false,
.create_cert_enumerator = (void*)enumerator_create_empty,
},
);
return this;
}
/**
* See header.
*/
pkcs7_t *pkcs7_data_load(chunk_t encoding, chunk_t content)
{
private_pkcs7_data_t *this = create_empty();
this->encoding = chunk_clone(encoding);
this->content = chunk_clone(content);
return &this->public;
}
/**
* See header.
*/
pkcs7_t *pkcs7_data_gen(container_type_t type, va_list args)
{
private_pkcs7_data_t *this;
chunk_t blob = chunk_empty;
while (TRUE)
{
switch (va_arg(args, builder_part_t))
{
case BUILD_BLOB:
blob = va_arg(args, chunk_t);
continue;
case BUILD_END:
break;
default:
return NULL;
}
break;
}
if (blob.len)
{
this = create_empty();
this->content = asn1_wrap(ASN1_OCTET_STRING, "c", blob);
this->encoding = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_PKCS7_DATA),
asn1_wrap(ASN1_CONTEXT_C_0, "c", this->content));
return &this->public;
}
return NULL;
}
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