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