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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 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 sha1_process_mp(hash_state *hs, mp_int *mp) {
int i;
buffer * buf;
buf = buf_new(512 + 20); /* max buffer is a 4096 bit key,
plus header + some leeway*/
buf_putmpint(buf, mp);
i = buf->pos;
buf_setpos(buf, 0);
sha1_process(hs, buf_getptr(buf, i), i);
buf_free(buf);
}
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