You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
179 lines
5.4 KiB
179 lines
5.4 KiB
/* crypto/ec/ec_print.c */ |
|
/* ==================================================================== |
|
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions |
|
* are met: |
|
* |
|
* 1. Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* |
|
* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in |
|
* the documentation and/or other materials provided with the |
|
* distribution. |
|
* |
|
* 3. All advertising materials mentioning features or use of this |
|
* software must display the following acknowledgment: |
|
* "This product includes software developed by the OpenSSL Project |
|
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
|
* |
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
|
* endorse or promote products derived from this software without |
|
* prior written permission. For written permission, please contact |
|
* openssl-core@openssl.org. |
|
* |
|
* 5. Products derived from this software may not be called "OpenSSL" |
|
* nor may "OpenSSL" appear in their names without prior written |
|
* permission of the OpenSSL Project. |
|
* |
|
* 6. Redistributions of any form whatsoever must retain the following |
|
* acknowledgment: |
|
* "This product includes software developed by the OpenSSL Project |
|
* for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
|
* OF THE POSSIBILITY OF SUCH DAMAGE. |
|
* ==================================================================== |
|
* |
|
* This product includes cryptographic software written by Eric Young |
|
* (eay@cryptsoft.com). This product includes software written by Tim |
|
* Hudson (tjh@cryptsoft.com). |
|
* |
|
*/ |
|
|
|
#include <openssl/crypto.h> |
|
#include "ec_lcl.h" |
|
|
|
BIGNUM *EC_POINT_point2bn(const EC_GROUP *group, |
|
const EC_POINT *point, |
|
point_conversion_form_t form, |
|
BIGNUM *ret, BN_CTX *ctx) |
|
{ |
|
size_t buf_len = 0; |
|
unsigned char *buf; |
|
|
|
buf_len = EC_POINT_point2oct(group, point, form, NULL, 0, ctx); |
|
if (buf_len == 0) |
|
return NULL; |
|
|
|
if ((buf = OPENSSL_malloc(buf_len)) == NULL) |
|
return NULL; |
|
|
|
if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx)) { |
|
OPENSSL_free(buf); |
|
return NULL; |
|
} |
|
|
|
ret = BN_bin2bn(buf, buf_len, ret); |
|
|
|
OPENSSL_free(buf); |
|
|
|
return ret; |
|
} |
|
|
|
EC_POINT *EC_POINT_bn2point(const EC_GROUP *group, |
|
const BIGNUM *bn, EC_POINT *point, BN_CTX *ctx) |
|
{ |
|
size_t buf_len = 0; |
|
unsigned char *buf; |
|
EC_POINT *ret; |
|
|
|
if ((buf_len = BN_num_bytes(bn)) == 0) |
|
return NULL; |
|
buf = OPENSSL_malloc(buf_len); |
|
if (buf == NULL) |
|
return NULL; |
|
|
|
if (!BN_bn2bin(bn, buf)) { |
|
OPENSSL_free(buf); |
|
return NULL; |
|
} |
|
|
|
if (point == NULL) { |
|
if ((ret = EC_POINT_new(group)) == NULL) { |
|
OPENSSL_free(buf); |
|
return NULL; |
|
} |
|
} else |
|
ret = point; |
|
|
|
if (!EC_POINT_oct2point(group, ret, buf, buf_len, ctx)) { |
|
if (point == NULL) |
|
EC_POINT_clear_free(ret); |
|
OPENSSL_free(buf); |
|
return NULL; |
|
} |
|
|
|
OPENSSL_free(buf); |
|
return ret; |
|
} |
|
|
|
static const char *HEX_DIGITS = "0123456789ABCDEF"; |
|
|
|
/* the return value must be freed (using OPENSSL_free()) */ |
|
char *EC_POINT_point2hex(const EC_GROUP *group, |
|
const EC_POINT *point, |
|
point_conversion_form_t form, BN_CTX *ctx) |
|
{ |
|
char *ret, *p; |
|
size_t buf_len = 0, i; |
|
unsigned char *buf, *pbuf; |
|
|
|
buf_len = EC_POINT_point2oct(group, point, form, NULL, 0, ctx); |
|
if (buf_len == 0) |
|
return NULL; |
|
|
|
if ((buf = OPENSSL_malloc(buf_len)) == NULL) |
|
return NULL; |
|
|
|
if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx)) { |
|
OPENSSL_free(buf); |
|
return NULL; |
|
} |
|
|
|
ret = (char *)OPENSSL_malloc(buf_len * 2 + 2); |
|
if (ret == NULL) { |
|
OPENSSL_free(buf); |
|
return NULL; |
|
} |
|
p = ret; |
|
pbuf = buf; |
|
for (i = buf_len; i > 0; i--) { |
|
int v = (int)*(pbuf++); |
|
*(p++) = HEX_DIGITS[v >> 4]; |
|
*(p++) = HEX_DIGITS[v & 0x0F]; |
|
} |
|
*p = '\0'; |
|
|
|
OPENSSL_free(buf); |
|
|
|
return ret; |
|
} |
|
|
|
EC_POINT *EC_POINT_hex2point(const EC_GROUP *group, |
|
const char *buf, EC_POINT *point, BN_CTX *ctx) |
|
{ |
|
EC_POINT *ret = NULL; |
|
BIGNUM *tmp_bn = NULL; |
|
|
|
if (!BN_hex2bn(&tmp_bn, buf)) |
|
return NULL; |
|
|
|
ret = EC_POINT_bn2point(group, tmp_bn, point, ctx); |
|
|
|
BN_clear_free(tmp_bn); |
|
|
|
return ret; |
|
}
|
|
|