Mercurial > dropbear
view bignum.c @ 1147:809feaa9408f DROPBEAR_2015.68
changelog and version 2015.68
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 08 Aug 2015 20:35:28 +0800 |
parents | 7540c0822374 |
children | 2bb4c662d1c2 |
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/* * Dropbear - a SSH2 server * * Copyright (c) 2002,2003 Matt Johnston * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* Contains helper functions for mp_int handling */ #include "includes.h" #include "dbutil.h" /* wrapper for mp_init, failing fatally on errors (memory allocation) */ void m_mp_init(mp_int *mp) { if (mp_init(mp) != MP_OKAY) { dropbear_exit("Mem alloc error"); } } /* simplified duplication of bn_mp_multi's mp_init_multi, but die fatally * on error */ void m_mp_init_multi(mp_int *mp, ...) { mp_int* cur_arg = mp; va_list args; va_start(args, mp); /* init args to next argument from caller */ while (cur_arg != NULL) { if (mp_init(cur_arg) != MP_OKAY) { dropbear_exit("Mem alloc error"); } cur_arg = va_arg(args, mp_int*); } va_end(args); } void m_mp_alloc_init_multi(mp_int **mp, ...) { mp_int** cur_arg = mp; va_list args; va_start(args, mp); /* init args to next argument from caller */ while (cur_arg != NULL) { *cur_arg = m_malloc(sizeof(mp_int)); if (mp_init(*cur_arg) != MP_OKAY) { dropbear_exit("Mem alloc error"); } cur_arg = va_arg(args, mp_int**); } va_end(args); } void bytes_to_mp(mp_int *mp, const unsigned char* bytes, unsigned int len) { if (mp_read_unsigned_bin(mp, (unsigned char*)bytes, len) != MP_OKAY) { dropbear_exit("Mem alloc error"); } } /* hash the ssh representation of the mp_int mp */ void hash_process_mp(const struct ltc_hash_descriptor *hash_desc, hash_state *hs, mp_int *mp) { buffer * buf; buf = buf_new(512 + 20); /* max buffer is a 4096 bit key, plus header + some leeway*/ buf_putmpint(buf, mp); hash_desc->process(hs, buf->data, buf->len); buf_free(buf); }