1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/ec/ec_print.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ==================================================================== 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the above copyright 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the documentation and/or other materials provided with the 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * distribution. 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * software must display the following acknowledgment: 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * endorse or promote products derived from this software without 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * prior written permission. For written permission, please contact 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * openssl-core@openssl.org. 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5. Products derived from this software may not be called "OpenSSL" 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * nor may "OpenSSL" appear in their names without prior written 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * permission of the OpenSSL Project. 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 6. Redistributions of any form whatsoever must retain the following 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * acknowledgment: 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OF THE POSSIBILITY OF SUCH DAMAGE. 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ==================================================================== 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This product includes cryptographic software written by Eric Young 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (eay@cryptsoft.com). This product includes software written by Tim 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Hudson (tjh@cryptsoft.com). 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/crypto.h> 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "ec_lcl.h" 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectBIGNUM *EC_POINT_point2bn(const EC_GROUP *group, 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project const EC_POINT *point, 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project point_conversion_form_t form, 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIGNUM *ret, 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX *ctx) 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project size_t buf_len=0; 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *buf; 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project buf_len = EC_POINT_point2oct(group, point, form, 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project NULL, 0, ctx); 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (buf_len == 0) 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((buf = OPENSSL_malloc(buf_len)) == NULL) 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx)) 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = BN_bin2bn(buf, buf_len, ret); 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectEC_POINT *EC_POINT_bn2point(const EC_GROUP *group, 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project const BIGNUM *bn, 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project EC_POINT *point, 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX *ctx) 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project size_t buf_len=0; 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *buf; 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project EC_POINT *ret; 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((buf_len = BN_num_bytes(bn)) == 0) return NULL; 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project buf = OPENSSL_malloc(buf_len); 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (buf == NULL) 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_bn2bin(bn, buf)) 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (point == NULL) 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((ret = EC_POINT_new(group)) == NULL) 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = point; 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!EC_POINT_oct2point(group, ret, buf, buf_len, ctx)) 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (point == NULL) 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project EC_POINT_clear_free(ret); 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic const char *HEX_DIGITS = "0123456789ABCDEF"; 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* the return value must be freed (using OPENSSL_free()) */ 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectchar *EC_POINT_point2hex(const EC_GROUP *group, 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project const EC_POINT *point, 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project point_conversion_form_t form, 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX *ctx) 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project char *ret, *p; 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project size_t buf_len=0,i; 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *buf, *pbuf; 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project buf_len = EC_POINT_point2oct(group, point, form, 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project NULL, 0, ctx); 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (buf_len == 0) 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((buf = OPENSSL_malloc(buf_len)) == NULL) 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx)) 153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 156656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 157656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = (char *)OPENSSL_malloc(buf_len*2+2); 159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ret == NULL) 160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p = ret; 165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pbuf = buf; 166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (i=buf_len; i > 0; i--) 167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int v = (int) *(pbuf++); 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *(p++)=HEX_DIGITS[v>>4]; 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *(p++)=HEX_DIGITS[v&0x0F]; 171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *p='\0'; 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(buf); 175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectEC_POINT *EC_POINT_hex2point(const EC_GROUP *group, 180656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project const char *buf, 181656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project EC_POINT *point, 182656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX *ctx) 183656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project EC_POINT *ret=NULL; 185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIGNUM *tmp_bn=NULL; 186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_hex2bn(&tmp_bn, buf)) 188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = EC_POINT_bn2point(group, tmp_bn, point, ctx); 191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_clear_free(tmp_bn); 193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 196