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/*
* Copyright (C) 2018 Tobias Brunner
* HSR Hochschule fuer Technik Rapperswil
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "botan_ed_public_key.h"
#include "botan_util.h"
#include <botan/build.h>
#ifdef BOTAN_HAS_ED25519
#include <utils/debug.h>
typedef struct private_public_key_t private_public_key_t;
/**
* Private data
*/
struct private_public_key_t {
/**
* Public interface
*/
public_key_t public;
/**
* Botan public key object
*/
botan_pubkey_t key;
/**
* Reference counter
*/
refcount_t ref;
};
METHOD(public_key_t, get_type, key_type_t,
private_public_key_t *this)
{
return KEY_ED25519;
}
METHOD(public_key_t, get_keysize, int,
private_public_key_t *this)
{
return ED25519_KEY_LEN * 8;
}
METHOD(public_key_t, verify, bool,
private_public_key_t *this, signature_scheme_t scheme,
void *params, chunk_t data, chunk_t signature)
{
switch (scheme)
{
case SIGN_ED25519:
return botan_verify_signature(this->key, "Pure", data, signature);
default:
DBG1(DBG_LIB, "signature scheme %N not supported via botan",
signature_scheme_names, scheme);
return FALSE;
}
}
METHOD(public_key_t, encrypt, bool,
private_public_key_t *this, encryption_scheme_t scheme,
chunk_t crypto, chunk_t *plain)
{
DBG1(DBG_LIB, "EdDSA public key encryption not implemented");
return FALSE;
}
METHOD(public_key_t, get_fingerprint, bool,
private_public_key_t *this, cred_encoding_type_t type,
chunk_t *fingerprint)
{
return botan_get_fingerprint(this->key, this, type, fingerprint);
}
METHOD(public_key_t, get_encoding, bool,
private_public_key_t *this, cred_encoding_type_t type,
chunk_t *encoding)
{
return botan_get_encoding(this->key, type, encoding);
}
METHOD(public_key_t, get_ref, public_key_t*,
private_public_key_t *this)
{
ref_get(&this->ref);
return &this->public;
}
METHOD(public_key_t, destroy, void,
private_public_key_t *this)
{
if (ref_put(&this->ref))
{
lib->encoding->clear_cache(lib->encoding, this);
botan_pubkey_destroy(this->key);
free(this);
}
}
/**
* Internal generic constructor
*/
static private_public_key_t *create_empty()
{
private_public_key_t *this;
INIT(this,
.public = {
.get_type = _get_type,
.verify = _verify,
.encrypt = _encrypt,
.get_keysize = _get_keysize,
.equals = public_key_equals,
.get_fingerprint = _get_fingerprint,
.has_fingerprint = public_key_has_fingerprint,
.get_encoding = _get_encoding,
.get_ref = _get_ref,
.destroy = _destroy,
},
.ref = 1,
);
return this;
}
/*
* Described in header
*/
public_key_t *botan_ed_public_key_adopt(botan_pubkey_t key)
{
private_public_key_t *this;
this = create_empty();
this->key = key;
return &this->public;
}
/*
* Described in header
*/
public_key_t *botan_ed_public_key_load(key_type_t type, va_list args)
{
private_public_key_t *this;
chunk_t key = chunk_empty;
while (TRUE)
{
switch (va_arg(args, builder_part_t))
{
case BUILD_EDDSA_PUB:
key = va_arg(args, chunk_t);
continue;
case BUILD_END:
break;
default:
return NULL;
}
break;
}
/* ASN.1-encoded keys are handled generically, so we only handle the
* explicit case */
if (key.len != ED25519_KEY_LEN)
{
return NULL;
}
this = create_empty();
if (botan_pubkey_load_ed25519(&this->key, key.ptr))
{
free(this);
return NULL;
}
return &this->public;
}
#endif
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