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started migration to encryption plugins

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This commit is contained in:
Andreas Steffen
2009-05-09 00:04:28 +02:00
parent bf45d6dd3b
commit d36ae9e305
24 changed files with 5630 additions and 253 deletions
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src/libstrongswan/crypto/crypters/crypter.c
+81
View File
@@ -14,6 +14,8 @@
* for more details.
*/
#include <asn1/oid.h>
#include "crypter.h"
ENUM_BEGIN(encryption_algorithm_names, ENCR_DES_IV64, ENCR_DES_IV32,
@@ -51,3 +53,82 @@ ENUM_NEXT(encryption_algorithm_names, ENCR_UNDEFINED, ENCR_TWOFISH, ENCR_CAMELLI
"TWOFISH");
ENUM_END(encryption_algorithm_names, ENCR_TWOFISH);
/*
* 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;
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;
default:
oid = OID_UNKNOWN;
}
return oid;
}
src/libstrongswan/crypto/crypters/crypter.h
+18
View File
@@ -128,4 +128,22 @@ struct crypter_t {
void (*destroy) (crypter_t *this);
};
/**
* Conversion of ASN.1 OID to encryption algorithm.
*
* @param oid ASN.1 OID
* @param key_size returns size of encryption key in bits
* @return encryption algorithm, ENCR_UNDEFINED if OID unsupported
*/
encryption_algorithm_t encryption_algorithm_from_oid(int oid, size_t *key_size);
/**
* Conversion of encryption algorithm to ASN.1 OID.
*
* @param alg encryption algorithm
* @param key_size size of encryption key in bits
* @return ASN.1 OID, OID_UNKNOWN if OID is unknown
*/
int encryption_algorithm_to_oid(encryption_algorithm_t alg, size_t key_size);
#endif /** CRYPTER_H_ @}*/