FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/cryptosoft_xform.c

     /*      $NetBSD: cryptosoft_xform.c,v 1.4 2006/11/16 01:33:51 christos Exp $ */
     /*      $FreeBSD: src/sys/opencrypto/xform.c,v 1.1.2.1 2002/11/21 23:34:23 sam Exp $    */
     /*      $OpenBSD: xform.c,v 1.19 2002/08/16 22:47:25 dhartmei Exp $     */
     
     /*
      * The authors of this code are John Ioannidis (ji@tla.org),
      * Angelos D. Keromytis (kermit@csd.uch.gr) and
      * Niels Provos (provos@physnet.uni-hamburg.de).
      *
     * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
     * in November 1995.
     *
     * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
     * by Angelos D. Keromytis.
     *
     * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
     * and Niels Provos.
     *
     * Additional features in 1999 by Angelos D. Keromytis.
     *
     * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
     * Angelos D. Keromytis and Niels Provos.
     *
     * Copyright (C) 2001, 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 copies of any software which is or includes a copy or
     * modification of this software.
     * You may use this code under the GNU public license if you so wish. Please
     * contribute changes back to the authors under this freer than GPL license
     * so that we may further the use of strong encryption without limitations to
     * all.
     *
     * 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.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(1, "$NetBSD: cryptosoft_xform.c,v 1.4 2006/11/16 01:33:51 christos Exp $");
    
    #include <crypto/blowfish/blowfish.h>
    #include <crypto/cast128/cast128.h>
    #include <crypto/des/des.h>
    #include <crypto/rijndael/rijndael.h>
    #include <crypto/skipjack/skipjack.h>
    
    #include <opencrypto/deflate.h>
    
    #include <sys/md5.h>
    #include <sys/rmd160.h>
    #include <sys/sha1.h>
    
    struct swcr_auth_hash {
            struct auth_hash *auth_hash;
            void (*Init)(void *);
            int  (*Update)(void *, const uint8_t *, uint16_t);
            void (*Final)(uint8_t *, void *);
    };
    
    struct swcr_enc_xform {
            struct enc_xform *enc_xform;
            void (*encrypt)(caddr_t, uint8_t *);
            void (*decrypt)(caddr_t, uint8_t *);
            int  (*setkey)(uint8_t **, const uint8_t *, int len);
            void (*zerokey)(uint8_t **);
    };
    
    struct swcr_comp_algo {
            struct comp_algo *comp_algo;
            uint32_t (*compress)(uint8_t *, uint32_t, uint8_t **);
            uint32_t (*decompress)(uint8_t *, uint32_t, uint8_t **);
    };
    
    static void null_encrypt(caddr_t, u_int8_t *);
    static void null_decrypt(caddr_t, u_int8_t *);
    static int null_setkey(u_int8_t **, const u_int8_t *, int);
    static void null_zerokey(u_int8_t **);
    
    static  int des1_setkey(u_int8_t **, const u_int8_t *, int);
    static  int des3_setkey(u_int8_t **, const u_int8_t *, int);
    static  int blf_setkey(u_int8_t **, const u_int8_t *, int);
    static  int cast5_setkey(u_int8_t **, const u_int8_t *, int);
    static  int skipjack_setkey(u_int8_t **, const u_int8_t *, int);
    static  int rijndael128_setkey(u_int8_t **, const u_int8_t *, int);
    static  void des1_encrypt(caddr_t, u_int8_t *);
    static  void des3_encrypt(caddr_t, u_int8_t *);
    static  void blf_encrypt(caddr_t, u_int8_t *);
    static  void cast5_encrypt(caddr_t, u_int8_t *);
    static  void skipjack_encrypt(caddr_t, u_int8_t *);
    static  void rijndael128_encrypt(caddr_t, u_int8_t *);
    static  void des1_decrypt(caddr_t, u_int8_t *);
    static  void des3_decrypt(caddr_t, u_int8_t *);
    static  void blf_decrypt(caddr_t, u_int8_t *);
    static  void cast5_decrypt(caddr_t, u_int8_t *);
    static  void skipjack_decrypt(caddr_t, u_int8_t *);
   static  void rijndael128_decrypt(caddr_t, u_int8_t *);
   static  void des1_zerokey(u_int8_t **);
   static  void des3_zerokey(u_int8_t **);
   static  void blf_zerokey(u_int8_t **);
   static  void cast5_zerokey(u_int8_t **);
   static  void skipjack_zerokey(u_int8_t **);
   static  void rijndael128_zerokey(u_int8_t **);
   
   static  void null_init(void *);
   static  int null_update(void *, const u_int8_t *, u_int16_t);
   static  void null_final(u_int8_t *, void *);
   
   static int      MD5Update_int(void *, const u_int8_t *, u_int16_t);
   static void     SHA1Init_int(void *);
   static  int SHA1Update_int(void *, const u_int8_t *, u_int16_t);
   static  void SHA1Final_int(u_int8_t *, void *);
   
   
   static int RMD160Update_int(void *, const u_int8_t *, u_int16_t);
   static  int SHA1Update_int(void *, const u_int8_t *, u_int16_t);
   static  void SHA1Final_int(u_int8_t *, void *);
   static  int RMD160Update_int(void *, const u_int8_t *, u_int16_t);
   static  int SHA256Update_int(void *, const u_int8_t *, u_int16_t);
   static  int SHA384Update_int(void *, const u_int8_t *, u_int16_t);
   static  int SHA512Update_int(void *, const u_int8_t *, u_int16_t);
   
   static u_int32_t deflate_compress(u_int8_t *, u_int32_t, u_int8_t **);
   static u_int32_t deflate_decompress(u_int8_t *, u_int32_t, u_int8_t **);
   
   /* Encryption instances */
   static const struct swcr_enc_xform swcr_enc_xform_null = {
           &enc_xform_null,
           null_encrypt,
           null_decrypt,
           null_setkey,
           null_zerokey,
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_des = {
           &enc_xform_des,
           des1_encrypt,
           des1_decrypt,
           des1_setkey,
           des1_zerokey,
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_3des = {
           &enc_xform_3des,
           des3_encrypt,
           des3_decrypt,
           des3_setkey,
           des3_zerokey
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_blf = {
           &enc_xform_blf,
           blf_encrypt,
           blf_decrypt,
           blf_setkey,
           blf_zerokey
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_cast5 = {
           &enc_xform_cast5,
           cast5_encrypt,
           cast5_decrypt,
           cast5_setkey,
           cast5_zerokey
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_skipjack = {
           &enc_xform_skipjack,
           skipjack_encrypt,
           skipjack_decrypt,
           skipjack_setkey,
           skipjack_zerokey
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_rijndael128 = {
           &enc_xform_rijndael128,
           rijndael128_encrypt,
           rijndael128_decrypt,
           rijndael128_setkey,
           rijndael128_zerokey,
   };
   
   static const struct swcr_enc_xform swcr_enc_xform_arc4 = {
           &enc_xform_arc4,
           NULL,
           NULL,
           NULL,
           NULL,
   };
   
   /* Authentication instances */
   static const struct swcr_auth_hash swcr_auth_hash_null = {
           &auth_hash_null,
           null_init, null_update, null_final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_hmac_md5_96 = {
           &auth_hash_hmac_md5_96,
           (void (*) (void *)) MD5Init, MD5Update_int,
           (void (*) (u_int8_t *, void *)) MD5Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_hmac_sha1_96 = {
           &auth_hash_hmac_sha1_96,
           SHA1Init_int, SHA1Update_int, SHA1Final_int
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_hmac_ripemd_160_96 = {
           &auth_hash_hmac_ripemd_160_96,
           (void (*)(void *)) RMD160Init, RMD160Update_int,
           (void (*)(u_int8_t *, void *)) RMD160Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_key_md5 = {
           &auth_hash_key_md5,
           (void (*)(void *)) MD5Init, MD5Update_int,
           (void (*)(u_int8_t *, void *)) MD5Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_key_sha1 = {
           &auth_hash_key_sha1,
           SHA1Init_int, SHA1Update_int, SHA1Final_int
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_md5 = {
           &auth_hash_md5,
           (void (*) (void *)) MD5Init, MD5Update_int,
           (void (*) (u_int8_t *, void *)) MD5Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_sha1 = {
           &auth_hash_sha1,
           (void (*)(void *)) SHA1Init, SHA1Update_int,
           (void (*)(u_int8_t *, void *)) SHA1Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_hmac_sha2_256 = {
           &auth_hash_hmac_sha2_256,
           (void (*)(void *)) SHA256_Init, SHA256Update_int,
           (void (*)(u_int8_t *, void *)) SHA256_Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_hmac_sha2_384 = {
           &auth_hash_hmac_sha2_384,
           (void (*)(void *)) SHA384_Init, SHA384Update_int,
           (void (*)(u_int8_t *, void *)) SHA384_Final
   };
   
   static const struct swcr_auth_hash swcr_auth_hash_hmac_sha2_512 = {
           &auth_hash_hmac_sha2_384,
           (void (*)(void *)) SHA512_Init, SHA512Update_int,
           (void (*)(u_int8_t *, void *)) SHA512_Final
   };
   
   /* Compression instance */
   static const struct swcr_comp_algo swcr_comp_algo_deflate = {
           &comp_algo_deflate,
           deflate_compress,
           deflate_decompress
   };
   
   /*
    * Encryption wrapper routines.
    */
   static void
   null_encrypt(caddr_t key, u_int8_t *blk)
   {
   }
   static void
   null_decrypt(caddr_t key, u_int8_t *blk)
   {
   }
   static int
   null_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           *sched = NULL;
           return 0;
   }
   static void
   null_zerokey(u_int8_t **sched)
   {
           *sched = NULL;
   }
   
   static void
   des1_encrypt(caddr_t key, u_int8_t *blk)
   {
           des_cblock *cb = (des_cblock *) blk;
           des_key_schedule *p = (des_key_schedule *) key;
   
           des_ecb_encrypt(cb, cb, p[0], DES_ENCRYPT);
   }
   
   static void
   des1_decrypt(caddr_t key, u_int8_t *blk)
   {
           des_cblock *cb = (des_cblock *) blk;
           des_key_schedule *p = (des_key_schedule *) key;
   
           des_ecb_encrypt(cb, cb, p[0], DES_DECRYPT);
   }
   
   static int
   des1_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           des_key_schedule *p;
           int err;
   
           MALLOC(p, des_key_schedule *, sizeof (des_key_schedule),
                   M_CRYPTO_DATA, M_NOWAIT);
           if (p != NULL) {
                   bzero(p, sizeof(des_key_schedule));
                   des_set_key((des_cblock *)__UNCONST(key), p[0]);
                   err = 0;
           } else
                   err = ENOMEM;
           *sched = (u_int8_t *) p;
           return err;
   }
   
   static void
   des1_zerokey(u_int8_t **sched)
   {
           bzero(*sched, sizeof (des_key_schedule));
           FREE(*sched, M_CRYPTO_DATA);
           *sched = NULL;
   }
   
   static void
   des3_encrypt(caddr_t key, u_int8_t *blk)
   {
           des_cblock *cb = (des_cblock *) blk;
           des_key_schedule *p = (des_key_schedule *) key;
   
           des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_ENCRYPT);
   }
   
   static void
   des3_decrypt(caddr_t key, u_int8_t *blk)
   {
           des_cblock *cb = (des_cblock *) blk;
           des_key_schedule *p = (des_key_schedule *) key;
   
           des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_DECRYPT);
   }
   
   static int
   des3_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           des_key_schedule *p;
           int err;
   
           MALLOC(p, des_key_schedule *, 3*sizeof (des_key_schedule),
                   M_CRYPTO_DATA, M_NOWAIT);
           if (p != NULL) {
                   bzero(p, 3*sizeof(des_key_schedule));
                   des_set_key((des_cblock *)__UNCONST(key +  0), p[0]);
                   des_set_key((des_cblock *)__UNCONST(key +  8), p[1]);
                   des_set_key((des_cblock *)__UNCONST(key + 16), p[2]);
                   err = 0;
           } else
                   err = ENOMEM;
           *sched = (u_int8_t *) p;
           return err;
   }
   
   static void
   des3_zerokey(u_int8_t **sched)
   {
           bzero(*sched, 3*sizeof (des_key_schedule));
           FREE(*sched, M_CRYPTO_DATA);
           *sched = NULL;
   }
   
   static void
   blf_encrypt(caddr_t key, u_int8_t *blk)
   {
   
   #if defined(__NetBSD__)
           BF_ecb_encrypt(blk, blk, (BF_KEY *)key, 1);
   #else
           blf_ecb_encrypt((blf_ctx *) key, blk, 8);
   #endif
   }
   
   static void
   blf_decrypt(caddr_t key, u_int8_t *blk)
   {
   
   #if defined(__NetBSD__)
           BF_ecb_encrypt(blk, blk, (BF_KEY *)key, 0);
   #else
           blf_ecb_decrypt((blf_ctx *) key, blk, 8);
   #endif
   }
   
   static int
   blf_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           int err;
   
   #if defined(__FreeBSD__) || defined(__NetBSD__)
   #define BLF_SIZ sizeof(BF_KEY)
   #else
   #define BLF_SIZ sizeof(blf_ctx)
   #endif
   
           MALLOC(*sched, u_int8_t *, BLF_SIZ,
                   M_CRYPTO_DATA, M_NOWAIT);
           if (*sched != NULL) {
                   bzero(*sched, BLF_SIZ);
   #if defined(__FreeBSD__) || defined(__NetBSD__)
                   BF_set_key((BF_KEY *) *sched, len, key);
   #else
                   blf_key((blf_ctx *)*sched, key, len);
   #endif
                   err = 0;
           } else
                   err = ENOMEM;
           return err;
   }
   
   static void
   blf_zerokey(u_int8_t **sched)
   {
           bzero(*sched, BLF_SIZ);
           FREE(*sched, M_CRYPTO_DATA);
           *sched = NULL;
   }
   
   static void
   cast5_encrypt(caddr_t key, u_int8_t *blk)
   {
           cast128_encrypt((cast128_key *) key, blk, blk);
   }
   
   static void
   cast5_decrypt(caddr_t key, u_int8_t *blk)
   {
           cast128_decrypt((cast128_key *) key, blk, blk);
   }
   
   static int
   cast5_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           int err;
   
           MALLOC(*sched, u_int8_t *, sizeof(cast128_key), M_CRYPTO_DATA,
                  M_NOWAIT);
           if (*sched != NULL) {
                   bzero(*sched, sizeof(cast128_key));
                   cast128_setkey((cast128_key *)*sched, key, len);
                   err = 0;
           } else
                   err = ENOMEM;
           return err;
   }
   
   static void
   cast5_zerokey(u_int8_t **sched)
   {
           bzero(*sched, sizeof(cast128_key));
           FREE(*sched, M_CRYPTO_DATA);
           *sched = NULL;
   }
   
   static void
   skipjack_encrypt(caddr_t key, u_int8_t *blk)
   {
           skipjack_forwards(blk, blk, (u_int8_t **) key);
   }
   
   static void
   skipjack_decrypt(caddr_t key, u_int8_t *blk)
   {
           skipjack_backwards(blk, blk, (u_int8_t **) key);
   }
   
   static int
   skipjack_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           int err;
   
           /* NB: allocate all the memory that's needed at once */
           /* XXX assumes bytes are aligned on sizeof(u_char) == 1 boundaries.
            * Will this break a pdp-10, Cray-1, or GE-645 port?
            */
           MALLOC(*sched, u_int8_t *, 10 * (sizeof(u_int8_t *) + 0x100),
                   M_CRYPTO_DATA, M_NOWAIT);
   
           if (*sched != NULL) {
   
                   u_int8_t** key_tables = (u_int8_t**) *sched;
                   u_int8_t* table = (u_int8_t*) &key_tables[10];
                   int k;
   
                   bzero(*sched, 10 * sizeof(u_int8_t *)+0x100);
   
                   for (k = 0; k < 10; k++) {
                           key_tables[k] = table;
                           table += 0x100;
                   }
                   subkey_table_gen(key, (u_int8_t **) *sched);
                   err = 0;
           } else
                   err = ENOMEM;
           return err;
   }
   
   static void
   skipjack_zerokey(u_int8_t **sched)
   {
           bzero(*sched, 10 * (sizeof(u_int8_t *) + 0x100));
           FREE(*sched, M_CRYPTO_DATA);
           *sched = NULL;
   }
   
   static void
   rijndael128_encrypt(caddr_t key, u_int8_t *blk)
   {
           rijndael_encrypt((rijndael_ctx *) key, (u_char *) blk, (u_char *) blk);
   }
   
   static void
   rijndael128_decrypt(caddr_t key, u_int8_t *blk)
   {
           rijndael_decrypt((rijndael_ctx *) key, (u_char *) blk,
               (u_char *) blk);
   }
   
   static int
   rijndael128_setkey(u_int8_t **sched, const u_int8_t *key, int len)
   {
           int err;
   
           MALLOC(*sched, u_int8_t *, sizeof(rijndael_ctx), M_CRYPTO_DATA,
               M_WAITOK);
           if (*sched != NULL) {
                   bzero(*sched, sizeof(rijndael_ctx));
                   rijndael_set_key((rijndael_ctx *) *sched, key, len * 8);
                   err = 0;
           } else
                   err = ENOMEM;
           return err;
   }
   
   static void
   rijndael128_zerokey(u_int8_t **sched)
   {
           bzero(*sched, sizeof(rijndael_ctx));
           FREE(*sched, M_CRYPTO_DATA);
           *sched = NULL;
   }
   
   /*
    * And now for auth.
    */
   
   static void
   null_init(void *ctx)
   {
   }
   
   static int
   null_update(void *ctx, const u_int8_t *buf,
       u_int16_t len)
   {
           return 0;
   }
   
   static void
   null_final(u_int8_t *buf, void *ctx)
   {
           if (buf != (u_int8_t *) 0)
                   bzero(buf, 12);
   }
   
   static int
   RMD160Update_int(void *ctx, const u_int8_t *buf, u_int16_t len)
   {
           RMD160Update(ctx, buf, len);
           return 0;
   }
   
   static int
   MD5Update_int(void *ctx, const u_int8_t *buf, u_int16_t len)
   {
           MD5Update(ctx, buf, len);
           return 0;
   }
   
   static void
   SHA1Init_int(void *ctx)
   {
           SHA1Init(ctx);
   }
   
   static int
   SHA1Update_int(void *ctx, const u_int8_t *buf, u_int16_t len)
   {
           SHA1Update(ctx, buf, len);
           return 0;
   }
   
   static void
   SHA1Final_int(u_int8_t *blk, void *ctx)
   {
           SHA1Final(blk, ctx);
   }
   
   static int
   SHA256Update_int(void *ctx, const u_int8_t *buf, u_int16_t len)
   {
           SHA256_Update(ctx, buf, len);
           return 0;
   }
   
   static int
   SHA384Update_int(void *ctx, const u_int8_t *buf, u_int16_t len)
   {
           SHA384_Update(ctx, buf, len);
           return 0;
   }
   
   static int
   SHA512Update_int(void *ctx, const u_int8_t *buf, u_int16_t len)
   {
           SHA512_Update(ctx, buf, len);
           return 0;
   }
   
   /*
    * And compression
    */
   
   static u_int32_t
   deflate_compress(data, size, out)
           u_int8_t *data;
           u_int32_t size;
           u_int8_t **out;
   {
           return deflate_global(data, size, 0, out);
   }
   
   static u_int32_t
   deflate_decompress(data, size, out)
           u_int8_t *data;
           u_int32_t size;
           u_int8_t **out;
   {
           return deflate_global(data, size, 1, out);
   }

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