FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/xform_sha2.c

     /*      $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $  */
     /*-
      * The authors of this code are John Ioannidis (ji@tla.org),
      * Angelos D. Keromytis (kermit@csd.uch.gr),
      * Niels Provos (provos@physnet.uni-hamburg.de) and
      * Damien Miller (djm@mindrot.org).
      *
      * 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.
     *
     * AES XTS implementation in 2008 by Damien Miller
     *
     * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
     * Angelos D. Keromytis and Niels Provos.
     *
     * Copyright (C) 2001, Angelos D. Keromytis.
     *
     * Copyright (C) 2008, Damien Miller
     * Copyright (c) 2014 The FreeBSD Foundation
     * All rights reserved.
     *
     * Portions of this software were developed by John-Mark Gurney
     * under sponsorship of the FreeBSD Foundation and
     * Rubicon Communications, LLC (Netgate).
     *
     * 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>
    __FBSDID("$FreeBSD$");
    
    #include <crypto/sha2/sha256.h>
    #include <crypto/sha2/sha384.h>
    #include <crypto/sha2/sha512.h>
    #include <opencrypto/xform_auth.h>
    
    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);
    
    /* Authentication instances */
    struct auth_hash auth_hash_hmac_sha2_256 = {
            CRYPTO_SHA2_256_HMAC, "HMAC-SHA2-256",
            SHA2_256_HMAC_KEY_LEN, SHA2_256_HASH_LEN, sizeof(SHA256_CTX),
            SHA2_256_HMAC_BLOCK_LEN,
            (void (*)(void *)) SHA256_Init, NULL, NULL, SHA256Update_int,
            (void (*)(u_int8_t *, void *)) SHA256_Final
    };
    
    struct auth_hash auth_hash_hmac_sha2_384 = {
            CRYPTO_SHA2_384_HMAC, "HMAC-SHA2-384",
            SHA2_384_HMAC_KEY_LEN, SHA2_384_HASH_LEN, sizeof(SHA384_CTX),
            SHA2_384_HMAC_BLOCK_LEN,
            (void (*)(void *)) SHA384_Init, NULL, NULL, SHA384Update_int,
            (void (*)(u_int8_t *, void *)) SHA384_Final
    };
    
    struct auth_hash auth_hash_hmac_sha2_512 = {
            CRYPTO_SHA2_512_HMAC, "HMAC-SHA2-512",
            SHA2_512_HMAC_KEY_LEN, SHA2_512_HASH_LEN, sizeof(SHA512_CTX),
            SHA2_512_HMAC_BLOCK_LEN,
            (void (*)(void *)) SHA512_Init, NULL, NULL, SHA512Update_int,
            (void (*)(u_int8_t *, void *)) SHA512_Final
    };
    
    /*
     * And now for auth.
     */
    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;
   }

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