FreeBSD/Linux Kernel Cross Reference
sys/kgssapi/krb5/kcrypto.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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_aes128_encryption_class;
    extern struct krb5_encryption_class krb5_aes256_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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