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