FreeBSD/Linux Kernel Cross Reference
sys/crypto/cryptodev.h

     /*      $OpenBSD: cryptodev.h,v 1.82 2022/05/03 09:18:11 claudio Exp $  */
     
     /*
      * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
      *
      * This code was written by Angelos D. Keromytis in Athens, Greece, in
      * February 2000. Network Security Technologies Inc. (NSTI) kindly
      * supported the development of this code.
      *
     * Copyright (c) 2000 Angelos D. Keromytis
     *
     * Permission to use, copy, and modify this software with or without fee
     * is hereby granted, provided that this entire notice is included in
     * all source code copies of any software which is or includes a copy or
     * modification of this software.
     *
     * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
     * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
     * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
     * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
     * PURPOSE.
     *
     * Copyright (c) 2001 Theo de Raadt
     *
     * 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 ``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 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.
     *
     * Effort sponsored in part by the Defense Advanced Research Projects
     * Agency (DARPA) and Air Force Research Laboratory, Air Force
     * Materiel Command, USAF, under agreement number F30602-01-2-0537.
     *
     */
    
    #ifndef _CRYPTO_CRYPTO_H_
    #define _CRYPTO_CRYPTO_H_
    
    #include <sys/task.h>
    
    /* Some initial values */
    #define CRYPTO_DRIVERS_INITIAL  4
    #define CRYPTO_DRIVERS_MAX      128
    #define CRYPTO_SW_SESSIONS      32
    
    /* HMAC values */
    #define HMAC_MD5_BLOCK_LEN      64
    #define HMAC_SHA1_BLOCK_LEN     64
    #define HMAC_RIPEMD160_BLOCK_LEN 64
    #define HMAC_SHA2_256_BLOCK_LEN 64
    #define HMAC_SHA2_384_BLOCK_LEN 128
    #define HMAC_SHA2_512_BLOCK_LEN 128
    #define HMAC_MAX_BLOCK_LEN      HMAC_SHA2_512_BLOCK_LEN /* keep in sync */
    #define HMAC_IPAD_VAL           0x36
    #define HMAC_OPAD_VAL           0x5C
    
    /* Encryption algorithm block sizes */
    #define DES3_BLOCK_LEN          8
    #define BLOWFISH_BLOCK_LEN      8
    #define CAST128_BLOCK_LEN       8
    #define RIJNDAEL128_BLOCK_LEN   16
    #define CHACHA20_BLOCK_LEN      64
    #define EALG_MAX_BLOCK_LEN      64 /* Keep this updated */
    
    /* Maximum hash algorithm result length */
    #define AALG_MAX_RESULT_LEN     64 /* Keep this updated */
    
    #define CRYPTO_3DES_CBC         1
    #define CRYPTO_BLF_CBC          2
    #define CRYPTO_CAST_CBC         3
    #define CRYPTO_MD5_HMAC         4
    #define CRYPTO_SHA1_HMAC        5
    #define CRYPTO_RIPEMD160_HMAC   6
    #define CRYPTO_RIJNDAEL128_CBC  7  /* 128 bit blocksize */
    #define CRYPTO_AES_CBC          7  /* 128 bit blocksize -- the same as above */
    #define CRYPTO_DEFLATE_COMP     8  /* Deflate compression algorithm */
    #define CRYPTO_NULL             9
    #define CRYPTO_SHA2_256_HMAC    11
    #define CRYPTO_SHA2_384_HMAC    12
    #define CRYPTO_SHA2_512_HMAC    13
    #define CRYPTO_AES_CTR          14
    #define CRYPTO_AES_XTS          15
    #define CRYPTO_AES_GCM_16       16
   #define CRYPTO_AES_128_GMAC     17
   #define CRYPTO_AES_192_GMAC     18
   #define CRYPTO_AES_256_GMAC     19
   #define CRYPTO_AES_GMAC         20
   #define CRYPTO_CHACHA20_POLY1305        21
   #define CRYPTO_CHACHA20_POLY1305_MAC    22
   #define CRYPTO_ESN              23 /* Support for Extended Sequence Numbers */
   #define CRYPTO_ALGORITHM_MAX    23 /* Keep updated */
   
   /* Algorithm flags */
   #define CRYPTO_ALG_FLAG_SUPPORTED       0x01 /* Algorithm is supported */
   
   /* Standard initialization structure beginning */
   struct cryptoini {
           int             cri_alg;        /* Algorithm to use */
           int             cri_klen;       /* Key length, in bits */
           int             cri_rnd;        /* Algorithm rounds, where relevant */
           caddr_t         cri_key;        /* key to use */
           union {
                   u_int8_t        iv[EALG_MAX_BLOCK_LEN]; /* IV to use */
                   u_int8_t        esn[4];                 /* high-order ESN */
           } u;
   #define cri_iv          u.iv
   #define cri_esn         u.esn
           struct cryptoini *cri_next;
   };
   
   /* Describe boundaries of a single crypto operation */
   struct cryptodesc {
           int             crd_skip;       /* How many bytes to ignore from start */
           int             crd_len;        /* How many bytes to process */
           int             crd_inject;     /* Where to inject results, if applicable */
           int             crd_flags;
   
   #define CRD_F_ENCRYPT           0x01    /* Set when doing encryption */
   #define CRD_F_IV_PRESENT        0x02    /* When encrypting, IV is already in
                                              place, so don't copy. */
   #define CRD_F_IV_EXPLICIT       0x04    /* IV explicitly provided */
   #define CRD_F_COMP              0x10    /* Set when doing compression */
   #define CRD_F_ESN               0x20    /* Set when ESN field is provided */
   
           struct cryptoini        CRD_INI; /* Initialization/context data */
   #define crd_esn         CRD_INI.cri_esn
   #define crd_iv          CRD_INI.cri_iv
   #define crd_key         CRD_INI.cri_key
   #define crd_rnd         CRD_INI.cri_rnd
   #define crd_alg         CRD_INI.cri_alg
   #define crd_klen        CRD_INI.cri_klen
   };
   
   /* Structure describing complete operation */
   struct cryptop {
           u_int64_t       crp_sid;        /* Session ID */
           int             crp_ilen;       /* Input data total length */
           int             crp_olen;       /* Result total length */
           int             crp_alloctype;  /* Type of buf to allocate if needed */
   
           int             crp_flags;
   
   #define CRYPTO_F_IMBUF  0x0001  /* Input/output are mbuf chains, otherwise contig */
   #define CRYPTO_F_IOV    0x0002  /* Input/output are uio */
   
           void            *crp_buf;       /* Data to be processed */
   
           struct cryptodesc *crp_desc;    /* List of processing descriptors */
           struct cryptodesc crp_sdesc[2]; /* Static array for small ops */
           int              crp_ndesc;     /* Amount of descriptors to use */
           int              crp_ndescalloc;/* Amount of descriptors allocated */
   
           caddr_t         crp_mac;
   };
   
   #define CRYPTO_BUF_IOV          0x1
   #define CRYPTO_BUF_MBUF         0x2
   
   #define CRYPTO_OP_DECRYPT       0x0
   #define CRYPTO_OP_ENCRYPT       0x1
   
   /* Crypto capabilities structure */
   struct cryptocap {
           u_int64_t       cc_operations;  /* Counter of how many ops done */
           u_int64_t       cc_bytes;       /* Counter of how many bytes done */
   
           u_int32_t       cc_sessions;    /* How many sessions allocated */
   
           /* Symmetric/hash algorithms supported */
           int             cc_alg[CRYPTO_ALGORITHM_MAX + 1];
   
           u_int8_t        cc_flags;
   #define CRYPTOCAP_F_CLEANUP     0x01
   #define CRYPTOCAP_F_SOFTWARE    0x02
   #define CRYPTOCAP_F_MPSAFE      0x04
   
           int             (*cc_newsession) (u_int32_t *, struct cryptoini *);
           int             (*cc_process) (struct cryptop *);
           int             (*cc_freesession) (u_int64_t);
   };
   
   void    crypto_init(void);
   
   int     crypto_newsession(u_int64_t *, struct cryptoini *, int);
   int     crypto_freesession(u_int64_t);
   int     crypto_register(u_int32_t, int *,
               int (*)(u_int32_t *, struct cryptoini *), int (*)(u_int64_t),
               int (*)(struct cryptop *));
   int     crypto_unregister(u_int32_t, int);
   int32_t crypto_get_driverid(u_int8_t);
   int     crypto_invoke(struct cryptop *);
   
   void    cuio_copydata(struct uio *, int, int, caddr_t);
   void    cuio_copyback(struct uio *, int, int, const void *);
   int     cuio_getptr(struct uio *, int, int *);
   int     cuio_apply(struct uio *, int, int,
               int (*f)(caddr_t, caddr_t, unsigned int), caddr_t);
   
   struct  cryptop *crypto_getreq(int);
   void    crypto_freereq(struct cryptop *);
   #endif /* _CRYPTO_CRYPTO_H_ */

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