76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
|
|
* 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);
|
|
}
|