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/*-
* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
* Authors: Doug Rabson <dfr@rabson.org>
* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/_iovec.h>
#define ETYPE_NULL 0
#define ETYPE_DES_CBC_CRC 1
#define ETYPE_DES_CBC_MD4 2
#define ETYPE_DES_CBC_MD5 3
#define ETYPE_DES3_CBC_MD5 5
#define ETYPE_OLD_DES3_CBC_SHA1 7
#define ETYPE_DES3_CBC_SHA1 16
#define ETYPE_AES128_CTS_HMAC_SHA1_96 17
#define ETYPE_AES256_CTS_HMAC_SHA1_96 18
#define ETYPE_ARCFOUR_HMAC_MD5 23
#define ETYPE_ARCFOUR_HMAC_MD5_56 24
/*
* Key usages for des3-cbc-sha1 tokens
*/
#define KG_USAGE_SEAL 22
#define KG_USAGE_SIGN 23
#define KG_USAGE_SEQ 24
/*
* Key usages for RFC4121 tokens
*/
#define KG_USAGE_ACCEPTOR_SEAL 22
#define KG_USAGE_ACCEPTOR_SIGN 23
#define KG_USAGE_INITIATOR_SEAL 24
#define KG_USAGE_INITIATOR_SIGN 25
struct krb5_key_state;
typedef void init_func(struct krb5_key_state *ks);
typedef void destroy_func(struct krb5_key_state *ks);
typedef void set_key_func(struct krb5_key_state *ks, const void *in);
typedef void random_to_key_func(struct krb5_key_state *ks, const void *in);
typedef void encrypt_func(const struct krb5_key_state *ks,
struct mbuf *inout, size_t skip, size_t len, void *ivec, size_t ivlen);
typedef void checksum_func(const struct krb5_key_state *ks, int usage,
struct mbuf *inout, size_t skip, size_t inlen, size_t outlen);
struct krb5_encryption_class {
const char *ec_name;
int ec_type;
int ec_flags;
#define EC_DERIVED_KEYS 1
size_t ec_blocklen;
size_t ec_msgblocklen;
size_t ec_checksumlen;
size_t ec_keybits; /* key length in bits */
size_t ec_keylen; /* size of key in memory */
init_func *ec_init;
destroy_func *ec_destroy;
set_key_func *ec_set_key;
random_to_key_func *ec_random_to_key;
encrypt_func *ec_encrypt;
encrypt_func *ec_decrypt;
checksum_func *ec_checksum;
};
struct krb5_key_state {
const struct krb5_encryption_class *ks_class;
volatile u_int ks_refs;
void *ks_key;
void *ks_priv;
};
extern struct krb5_encryption_class krb5_des_encryption_class;
extern struct krb5_encryption_class krb5_des3_encryption_class;
extern struct krb5_encryption_class krb5_aes128_encryption_class;
extern struct krb5_encryption_class krb5_aes256_encryption_class;
extern struct krb5_encryption_class krb5_arcfour_encryption_class;
extern struct krb5_encryption_class krb5_arcfour_56_encryption_class;
static __inline void
krb5_set_key(struct krb5_key_state *ks, const void *keydata)
{
ks->ks_class->ec_set_key(ks, keydata);
}
static __inline void
krb5_random_to_key(struct krb5_key_state *ks, const void *keydata)
{
ks->ks_class->ec_random_to_key(ks, keydata);
}
static __inline void
krb5_encrypt(const struct krb5_key_state *ks, struct mbuf *inout,
size_t skip, size_t len, void *ivec, size_t ivlen)
{
ks->ks_class->ec_encrypt(ks, inout, skip, len, ivec, ivlen);
}
static __inline void
krb5_decrypt(const struct krb5_key_state *ks, struct mbuf *inout,
size_t skip, size_t len, void *ivec, size_t ivlen)
{
ks->ks_class->ec_decrypt(ks, inout, skip, len, ivec, ivlen);
}
static __inline void
krb5_checksum(const struct krb5_key_state *ks, int usage,
struct mbuf *inout, size_t skip, size_t inlen, size_t outlen)
{
ks->ks_class->ec_checksum(ks, usage, inout, skip, inlen, outlen);
}
extern struct krb5_encryption_class *
krb5_find_encryption_class(int etype);
extern struct krb5_key_state *
krb5_create_key(const struct krb5_encryption_class *ec);
extern void krb5_free_key(struct krb5_key_state *ks);
extern struct krb5_key_state *
krb5_derive_key(struct krb5_key_state *inkey,
void *constant, size_t constantlen);
extern struct krb5_key_state *
krb5_get_encryption_key(struct krb5_key_state *basekey, int usage);
extern struct krb5_key_state *
krb5_get_integrity_key(struct krb5_key_state *basekey, int usage);
extern struct krb5_key_state *
krb5_get_checksum_key(struct krb5_key_state *basekey, int usage);
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