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Diffstat (limited to 'keyexchange/isakmpd-20041012/sysdep/common/blf.h')
| -rw-r--r-- | keyexchange/isakmpd-20041012/sysdep/common/blf.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/keyexchange/isakmpd-20041012/sysdep/common/blf.h b/keyexchange/isakmpd-20041012/sysdep/common/blf.h new file mode 100644 index 0000000..97eec89 --- /dev/null +++ b/keyexchange/isakmpd-20041012/sysdep/common/blf.h @@ -0,0 +1,70 @@ +/* $OpenBSD: blf.h,v 1.5 2003/06/03 14:52:06 ho Exp $ */ +/* + * Blowfish - a fast block cipher designed by Bruce Schneier + * + * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de> + * All rights reserved. + * + * 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. + */ + +#ifndef _BLF_H_ +#define _BLF_H_ + +/* Schneier states the maximum key length to be 56 bytes. + * The way how the subkeys are initialized by the key up + * to (N+2)*4 i.e. 72 bytes are utilized. + * Warning: For normal blowfish encryption only 56 bytes + * of the key affect all cipherbits. + */ + +#define BLF_N 16 /* Number of Subkeys */ +#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */ + +/* Blowfish context */ +typedef struct BlowfishContext { + u_int32_t S[4][256]; /* S-Boxes */ + u_int32_t P[BLF_N + 2]; /* Subkeys */ +} blf_ctx; + +/* Raw access to customized Blowfish + * blf_key is just: + * Blowfish_initstate( state ) + * Blowfish_expand0state( state, key, keylen ) + */ + +void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *); +void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *); +void Blowfish_initstate(blf_ctx *); +void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t); +void Blowfish_expandstate +(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t); + +/* Standard Blowfish */ + +void blf_key(blf_ctx *, const u_int8_t *, u_int16_t); +void blf_enc(blf_ctx *, u_int32_t *, u_int16_t); +void blf_dec(blf_ctx *, u_int32_t *, u_int16_t); + +/* Converts u_int8_t to u_int32_t */ +u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *); + +#endif |