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author | djm <devnull@localhost> | 2006-05-22 11:53:27 +0000 |
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committer | djm <devnull@localhost> | 2006-05-22 11:53:27 +0000 |
commit | 08f7132af5c94eaababc9811afb2a90c9c9e2bf8 (patch) | |
tree | 7e189b2014644405e53c41df254a4f3740091ad1 /bcrypt/pybc_blf.h | |
download | py-bcrypt-08f7132af5c94eaababc9811afb2a90c9c9e2bf8.tar.gz |
Initial revision
Diffstat (limited to 'bcrypt/pybc_blf.h')
-rw-r--r-- | bcrypt/pybc_blf.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/bcrypt/pybc_blf.h b/bcrypt/pybc_blf.h new file mode 100644 index 0000000..269e25c --- /dev/null +++ b/bcrypt/pybc_blf.h @@ -0,0 +1,71 @@ +/* $OpenBSD: blf.h,v 1.6 2002/02/16 21:27:17 millert 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Niels Provos. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * 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 _PYBC_BLF_H_ +#define _PYBC_BLF_H_ + +/* Schneier specifies a maximum key length of 56 bytes. + * This ensures that every key bit affects every cipher + * bit. However, the subkeys can hold up to 72 bytes. + * 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 */ +} pybc_blf_ctx; + +/* Raw access to customized Blowfish + * blf_key is just: + * Blowfish_initstate( state ) + * Blowfish_expand0state( state, key, keylen ) + */ + +void pybc_Blowfish_initstate(pybc_blf_ctx *); +void pybc_Blowfish_expand0state(pybc_blf_ctx *, const u_int8_t *, u_int16_t); +void pybc_Blowfish_expandstate(pybc_blf_ctx *, const u_int8_t *, u_int16_t, + const u_int8_t *, u_int16_t); + +/* Standard Blowfish */ + +void pybc_blf_enc(pybc_blf_ctx *, u_int32_t *, u_int16_t); + +/* Converts u_int8_t to u_int32_t */ +u_int32_t pybc_Blowfish_stream2word(const u_int8_t *, u_int16_t, u_int16_t *); + +#endif |