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/*
* Copyright (C) 2005-2006 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 <asn1/oid.h>
#include "crypter.h"
ENUM_BEGIN(encryption_algorithm_names, ENCR_DES_IV64, ENCR_DES_IV32,
"DES_IV64",
"DES_CBC",
"3DES_CBC",
"RC5_CBC",
"IDEA_CBC",
"CAST_CBC",
"BLOWFISH_CBC",
"3IDEA",
"DES_IV32");
ENUM_NEXT(encryption_algorithm_names, ENCR_NULL, ENCR_AES_CCM_ICV16, ENCR_DES_IV32,
"NULL",
"AES_CBC",
"AES_CTR",
"AES_CCM_8",
"AES_CCM_12",
"AES_CCM_16");
ENUM_NEXT(encryption_algorithm_names, ENCR_AES_GCM_ICV8, ENCR_NULL_AUTH_AES_GMAC, ENCR_AES_CCM_ICV16,
"AES_GCM_8",
"AES_GCM_12",
"AES_GCM_16",
"NULL_AES_GMAC");
ENUM_NEXT(encryption_algorithm_names, ENCR_CAMELLIA_CBC, ENCR_CAMELLIA_CCM_ICV16, ENCR_NULL_AUTH_AES_GMAC,
"CAMELLIA_CBC",
"CAMELLIA_CTR",
"CAMELLIA_CCM_8",
"CAMELLIA_CCM_12",
"CAMELLIA_CCM_16");
ENUM_NEXT(encryption_algorithm_names, ENCR_UNDEFINED, ENCR_RC2_CBC, ENCR_CAMELLIA_CCM_ICV16,
"UNDEFINED",
"DES_ECB",
"SERPENT_CBC",
"TWOFISH_CBC",
"RC2_CBC");
ENUM_END(encryption_algorithm_names, ENCR_RC2_CBC);
/*
* Described in header.
*/
encryption_algorithm_t encryption_algorithm_from_oid(int oid, size_t *key_size)
{
encryption_algorithm_t alg;
size_t alg_key_size;
switch (oid)
{
case OID_DES_CBC:
alg = ENCR_DES;
alg_key_size = 0;
break;
case OID_3DES_EDE_CBC:
alg = ENCR_3DES;
alg_key_size = 0;
break;
case OID_AES128_CBC:
alg = ENCR_AES_CBC;
alg_key_size = 128;
break;
case OID_AES192_CBC:
alg = ENCR_AES_CBC;
alg_key_size = 192;
break;
case OID_AES256_CBC:
alg = ENCR_AES_CBC;
alg_key_size = 256;
break;
case OID_CAMELLIA128_CBC:
alg = ENCR_CAMELLIA_CBC;
alg_key_size = 128;
break;
case OID_CAMELLIA192_CBC:
alg = ENCR_CAMELLIA_CBC;
alg_key_size = 192;
break;
case OID_CAMELLIA256_CBC:
alg = ENCR_CAMELLIA_CBC;
alg_key_size = 256;
break;
default:
alg = ENCR_UNDEFINED;
alg_key_size = 0;
}
if (key_size)
{
*key_size = alg_key_size;
}
return alg;
}
/*
* Described in header.
*/
int encryption_algorithm_to_oid(encryption_algorithm_t alg, size_t key_size)
{
int oid;
switch(alg)
{
case ENCR_DES:
oid = OID_DES_CBC;
break;
case ENCR_3DES:
oid = OID_3DES_EDE_CBC;
break;
case ENCR_AES_CBC:
switch (key_size)
{
case 128:
oid = OID_AES128_CBC;
break;
case 192:
oid = OID_AES192_CBC;
break;
case 256:
oid = OID_AES256_CBC;
break;
default:
oid = OID_UNKNOWN;
}
break;
case ENCR_CAMELLIA_CBC:
switch (key_size)
{
case 128:
oid = OID_CAMELLIA128_CBC;
break;
case 192:
oid = OID_CAMELLIA192_CBC;
break;
case 256:
oid = OID_CAMELLIA256_CBC;
break;
default:
oid = OID_UNKNOWN;
}
break;
default:
oid = OID_UNKNOWN;
}
return oid;
}
/*
* Described in header.
*/
bool encryption_algorithm_is_aead(encryption_algorithm_t alg)
{
switch (alg)
{
case ENCR_AES_CCM_ICV8:
case ENCR_AES_CCM_ICV12:
case ENCR_AES_CCM_ICV16:
case ENCR_AES_GCM_ICV8:
case ENCR_AES_GCM_ICV12:
case ENCR_AES_GCM_ICV16:
case ENCR_NULL_AUTH_AES_GMAC:
case ENCR_CAMELLIA_CCM_ICV8:
case ENCR_CAMELLIA_CCM_ICV12:
case ENCR_CAMELLIA_CCM_ICV16:
return TRUE;
default:
return FALSE;
}
}
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