mirror of
https://github.com/PowerShell/Win32-OpenSSH.git
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151 lines
3.1 KiB
C
151 lines
3.1 KiB
C
/*
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* Copyright (c) 2015 Damien Miller <djm@mindrot.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <includes.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <openssl/bn.h>
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#include <openssl/ec.h>
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#include "sshbuf.h"
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#include "packet.h"
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#include "ssherr.h"
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#include "crypto-wrap.h"
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struct sshepoint {
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EC_POINT *pt;
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EC_GROUP *gp;
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};
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struct sshecurve {
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EC_GROUP *gp;
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};
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struct sshepoint *
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sshepoint_new(void)
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{
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return malloc(sizeof(struct sshepoint));
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}
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void
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sshepoint_free(struct sshepoint *pt)
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{
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if (pt != NULL) {
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if (pt->pt != NULL)
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EC_POINT_free(pt->pt);
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if (pt->gp != NULL)
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EC_GROUP_free(pt->gp);
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explicit_bzero(pt, sizeof(*pt));
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free(pt);
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}
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}
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int sshepoint_from(struct sshbn * x, struct sshbn * y, struct sshecurve * curve, struct sshepoint **retp)
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{
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struct sshepoint *ret = NULL;
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*retp = NULL;
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if ((ret = sshepoint_new()) == NULL)
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{
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return SSH_ERR_ALLOC_FAIL;
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}
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if ((ret->pt = EC_POINT_new(curve->gp)) == NULL)
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{
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sshepoint_free(ret);
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return SSH_ERR_LIBCRYPTO_ERROR;
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}
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ret->gp = curve->gp;
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if (EC_POINT_set_affine_corrdinates_GFp(curve->gp, ret->pt, x, y)) {
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sshepoint_free(ret);
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return SSH_ERR_LIBCRYPTO_ERROR;
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}
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*retp = ret;
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return 0;
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}
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int sshepoint_to(struct sshepoint * pt, struct sshbn **retx, struct sshbn **rety, struct sshecurve ** retcurve)
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{
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struct sshbn * x = NULL;
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struct sshbn * y = NULL;
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struct sshecurve * curve = NULL;
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if (((x = sshbn_new()) == NULL) ||
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((y = sshbn_new()) == NULL) ||
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((curve = sshecurve_new()) == NULL))
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{
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sshbn_free(x);
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sshbn_free(y);
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sshecurve_free(curve);
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return SSH_ERR_ALLOC_FAIL;
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}
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curve->gp = pt->gp;
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if (EC_POINT_get_affine_coordinates_GFp(pt->gp, pt->pt, sshbn_bignum(x), sshbn_bignum(y), NULL))
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{
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sshecurve_free(curve);
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sshbn_free(x);
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sshbn_free(y);
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return SSH_ERR_LIBCRYPTO_ERROR;
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}
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*retcurve = curve;
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*retx = x;
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*rety = y;
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return 0;
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}
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struct sshecurve * sshecurve_new(void)
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{
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struct sshecurve * curve = NULL;
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curve = (struct sshecurve *)malloc(sizeof(struct sshecurve));
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memset(curve, 0, sizeof(struct sshecurve));
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return curve;
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}
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void sshecurve_free(struct sshecurve * curve)
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{
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if (curve != NULL) {
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if (curve->gp != NULL)
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EC_GROUP_free(curve->gp);
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explicit_bzero(curve, sizeof(*curve));
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free(curve);
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}
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}
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struct sshecurve * sshecurve_new_curve(int nid)
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{
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struct sshecurve * ret;
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if ((ret = sshecurve_new()) == NULL)
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return NULL;
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ret->gp = EC_GROUP_new_by_curve_name(nid);
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return ret;
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} |