lua-bcrypt

Secure password hashing for Lua
Log | Files | Refs | README

blf.h (3415B)


      1 /* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */
      2 /*
      3  * Blowfish - a fast block cipher designed by Bruce Schneier
      4  *
      5  * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Niels Provos.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef _BLF_H_
     35 #define _BLF_H_
     36 
     37 /* Schneier specifies a maximum key length of 56 bytes.
     38  * This ensures that every key bit affects every cipher
     39  * bit.  However, the subkeys can hold up to 72 bytes.
     40  * Warning: For normal blowfish encryption only 56 bytes
     41  * of the key affect all cipherbits.
     42  */
     43 
     44 #define BLF_N	16			/* Number of Subkeys */
     45 #define BLF_MAXKEYLEN ((BLF_N-2)*4)	/* 448 bits */
     46 #define BLF_MAXUTILIZED ((BLF_N+2)*4)	/* 576 bits */
     47 
     48 /* Blowfish context */
     49 typedef struct BlowfishContext {
     50 	u_int32_t S[4][256];	/* S-Boxes */
     51 	u_int32_t P[BLF_N + 2];	/* Subkeys */
     52 } blf_ctx;
     53 
     54 /* Raw access to customized Blowfish
     55  *	blf_key is just:
     56  *	Blowfish_initstate( state )
     57  *	Blowfish_expand0state( state, key, keylen )
     58  */
     59 
     60 void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *);
     61 void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *);
     62 void Blowfish_initstate(blf_ctx *);
     63 void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
     64 void Blowfish_expandstate
     65 (blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
     66 
     67 /* Standard Blowfish */
     68 
     69 void blf_key(blf_ctx *, const u_int8_t *, u_int16_t);
     70 void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
     71 void blf_dec(blf_ctx *, u_int32_t *, u_int16_t);
     72 
     73 void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t);
     74 void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t);
     75 
     76 void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
     77 void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
     78 
     79 /* Converts u_int8_t to u_int32_t */
     80 u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *);
     81 
     82 #endif