/*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Elliptic Curve Cryptography library.
*
* The Initial Developer of the Original Code is
* Sun Microsystems, Inc.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dr Vipul Gupta <vipul.gupta@sun.com> and
* Douglas Stebila <douglas@stebila.ca>, Sun Microsystems Laboratories
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Sun elects to use this software under the MPL license.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/param.h>
#ifdef _KERNEL
#include <sys/kmem.h>
#else
#include <string.h>
#endif
#include "ec.h"
#include "ecl-curve.h"
#include "ecc_impl.h"
#define MAX_ECKEY_LEN 72
#define SEC_ASN1_OBJECT_ID 0x06
/*
* Initializes a SECItem from a hexadecimal string
*
* Warning: This function ignores leading 00's, so any leading 00's
* in the hexadecimal string must be optional.
*/
static SECItem *
hexString2SECItem(PRArenaPool *arena, SECItem *item, const char *str,
int kmflag)
{
int i = 0;
int byteval = 0;
int tmp = strlen(str);
if ((tmp % 2) != 0) return NULL;
/* skip leading 00's unless the hex string is "00" */
while ((tmp > 2) && (str[0] == '0') && (str[1] == '0')) {
str += 2;
tmp -= 2;
}
item->data = (unsigned char *) PORT_ArenaAlloc(arena, tmp/2, kmflag);
if (item->data == NULL) return NULL;
item->len = tmp/2;
while (str[i]) {
if ((str[i] >= '0') && (str[i] <= '9'))
tmp = str[i] - '0';
else if ((str[i] >= 'a') && (str[i] <= 'f'))
tmp = str[i] - 'a' + 10;
else if ((str[i] >= 'A') && (str[i] <= 'F'))
tmp = str[i] - 'A' + 10;
else
return NULL;
byteval = byteval * 16 + tmp;
if ((i % 2) != 0) {
item->data[i/2] = byteval;
byteval = 0;
}
i++;
}
return item;
}
static SECStatus
gf_populate_params(ECCurveName name, ECFieldType field_type, ECParams *params,
int kmflag)
{
SECStatus rv = SECFailure;
const ECCurveParams *curveParams;
/* 2 ['0'+'4'] + MAX_ECKEY_LEN * 2 [x,y] * 2 [hex string] + 1 ['\0'] */
char genenc[3 + 2 * 2 * MAX_ECKEY_LEN];
if ((name < ECCurve_noName) || (name > ECCurve_pastLastCurve)) goto cleanup;
params->name = name;
curveParams = ecCurve_map[params->name];
CHECK_OK(curveParams);
params->fieldID.size = curveParams->size;
params->fieldID.type = field_type;
if (field_type == ec_field_GFp) {
CHECK_OK(hexString2SECItem(NULL, &params->fieldID.u.prime,
curveParams->irr, kmflag));
} else {
CHECK_OK(hexString2SECItem(NULL, &params->fieldID.u.poly,
curveParams->irr, kmflag));
}
CHECK_OK(hexString2SECItem(NULL, &params->curve.a,
curveParams->curvea, kmflag));
CHECK_OK(hexString2SECItem(NULL, &params->curve.b,
curveParams->curveb, kmflag));
genenc[0] = '0';
genenc[1] = '4';
genenc[2] = '\0';
strcat(genenc, curveParams->genx);
strcat(genenc, curveParams->geny);
CHECK_OK(hexString2SECItem(NULL, &params->base, genenc, kmflag));
CHECK_OK(hexString2SECItem(NULL, &params->order,
curveParams->order, kmflag));
params->cofactor = curveParams->cofactor;
rv = SECSuccess;
cleanup:
return rv;
}
ECCurveName SECOID_FindOIDTag(const SECItem *);
SECStatus
EC_FillParams(PRArenaPool *arena, const SECItem *encodedParams,
ECParams *params, int kmflag)
{
SECStatus rv = SECFailure;
ECCurveName tag;
SECItem oid = { siBuffer, NULL, 0};
#if EC_DEBUG
int i;
printf("Encoded params in EC_DecodeParams: ");
for (i = 0; i < encodedParams->len; i++) {
printf("%02x:", encodedParams->data[i]);
}
printf("\n");
#endif
if ((encodedParams->len != ANSI_X962_CURVE_OID_TOTAL_LEN) &&
(encodedParams->len != SECG_CURVE_OID_TOTAL_LEN)) {
PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
return SECFailure;
};
oid.len = encodedParams->len - 2;
oid.data = encodedParams->data + 2;
if ((encodedParams->data[0] != SEC_ASN1_OBJECT_ID) ||
((tag = SECOID_FindOIDTag(&oid)) == ECCurve_noName)) {
PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
return SECFailure;
}
params->arena = arena;
params->cofactor = 0;
params->type = ec_params_named;
params->name = ECCurve_noName;
/* For named curves, fill out curveOID */
params->curveOID.len = oid.len;
params->curveOID.data = (unsigned char *) PORT_ArenaAlloc(NULL, oid.len,
kmflag);
if (params->curveOID.data == NULL) goto cleanup;
memcpy(params->curveOID.data, oid.data, oid.len);
#if EC_DEBUG
printf("Curve: %s\n", SECOID_FindOIDTagDescription(tag));
#endif
switch (tag) {
/* Binary curves */
case ECCurve_X9_62_CHAR2_PNB163V1:
/* Populate params for c2pnb163v1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB163V1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB163V2:
/* Populate params for c2pnb163v2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB163V2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB163V3:
/* Populate params for c2pnb163v3 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB163V3, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB176V1:
/* Populate params for c2pnb176v1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB176V1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB191V1:
/* Populate params for c2tnb191v1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB191V1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB191V2:
/* Populate params for c2tnb191v2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB191V2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB191V3:
/* Populate params for c2tnb191v3 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB191V3, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB208W1:
/* Populate params for c2pnb208w1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB208W1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB239V1:
/* Populate params for c2tnb239v1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB239V1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB239V2:
/* Populate params for c2tnb239v2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB239V2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB239V3:
/* Populate params for c2tnb239v3 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB239V3, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB272W1:
/* Populate params for c2pnb272w1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB272W1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB304W1:
/* Populate params for c2pnb304w1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB304W1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB359V1:
/* Populate params for c2tnb359v1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB359V1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_PNB368W1:
/* Populate params for c2pnb368w1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_PNB368W1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_X9_62_CHAR2_TNB431R1:
/* Populate params for c2tnb431r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_CHAR2_TNB431R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_113R1:
/* Populate params for sect113r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_113R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_113R2:
/* Populate params for sect113r2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_113R2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_131R1:
/* Populate params for sect131r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_131R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_131R2:
/* Populate params for sect131r2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_131R2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_163K1:
/* Populate params for sect163k1
* (the NIST K-163 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_163K1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_163R1:
/* Populate params for sect163r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_163R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_163R2:
/* Populate params for sect163r2
* (the NIST B-163 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_163R2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_193R1:
/* Populate params for sect193r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_193R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_193R2:
/* Populate params for sect193r2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_193R2, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_233K1:
/* Populate params for sect233k1
* (the NIST K-233 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_233K1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_233R1:
/* Populate params for sect233r1
* (the NIST B-233 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_233R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_239K1:
/* Populate params for sect239k1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_239K1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_283K1:
/* Populate params for sect283k1
* (the NIST K-283 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_283K1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_283R1:
/* Populate params for sect283r1
* (the NIST B-283 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_283R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_409K1:
/* Populate params for sect409k1
* (the NIST K-409 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_409K1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_409R1:
/* Populate params for sect409r1
* (the NIST B-409 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_409R1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_571K1:
/* Populate params for sect571k1
* (the NIST K-571 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_571K1, ec_field_GF2m,
params, kmflag) );
break;
case ECCurve_SECG_CHAR2_571R1:
/* Populate params for sect571r1
* (the NIST B-571 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_CHAR2_571R1, ec_field_GF2m,
params, kmflag) );
break;
/* Prime curves */
case ECCurve_X9_62_PRIME_192V1:
/* Populate params for prime192v1 aka secp192r1
* (the NIST P-192 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_192V1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_X9_62_PRIME_192V2:
/* Populate params for prime192v2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_192V2, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_X9_62_PRIME_192V3:
/* Populate params for prime192v3 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_192V3, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_X9_62_PRIME_239V1:
/* Populate params for prime239v1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_239V1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_X9_62_PRIME_239V2:
/* Populate params for prime239v2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_239V2, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_X9_62_PRIME_239V3:
/* Populate params for prime239v3 */
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_239V3, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_X9_62_PRIME_256V1:
/* Populate params for prime256v1 aka secp256r1
* (the NIST P-256 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_X9_62_PRIME_256V1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_112R1:
/* Populate params for secp112r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_112R1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_112R2:
/* Populate params for secp112r2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_112R2, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_128R1:
/* Populate params for secp128r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_128R1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_128R2:
/* Populate params for secp128r2 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_128R2, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_160K1:
/* Populate params for secp160k1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_160K1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_160R1:
/* Populate params for secp160r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_160R1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_160R2:
/* Populate params for secp160r1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_160R2, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_192K1:
/* Populate params for secp192k1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_192K1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_224K1:
/* Populate params for secp224k1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_224K1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_224R1:
/* Populate params for secp224r1
* (the NIST P-224 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_224R1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_256K1:
/* Populate params for secp256k1 */
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_256K1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_384R1:
/* Populate params for secp384r1
* (the NIST P-384 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_384R1, ec_field_GFp,
params, kmflag) );
break;
case ECCurve_SECG_PRIME_521R1:
/* Populate params for secp521r1
* (the NIST P-521 curve)
*/
CHECK_SEC_OK( gf_populate_params(ECCurve_SECG_PRIME_521R1, ec_field_GFp,
params, kmflag) );
break;
default:
break;
};
cleanup:
if (!params->cofactor) {
PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
#if EC_DEBUG
printf("Unrecognized curve, returning NULL params\n");
#endif
}
return rv;
}
SECStatus
EC_DecodeParams(const SECItem *encodedParams, ECParams **ecparams, int kmflag)
{
PRArenaPool *arena;
ECParams *params;
SECStatus rv = SECFailure;
/* Initialize an arena for the ECParams structure */
if (!(arena = PORT_NewArena(NSS_FREEBL_DEFAULT_CHUNKSIZE)))
return SECFailure;
params = (ECParams *)PORT_ArenaZAlloc(NULL, sizeof(ECParams), kmflag);
if (!params) {
PORT_FreeArena(NULL, B_TRUE);
return SECFailure;
}
/* Copy the encoded params */
SECITEM_AllocItem(arena, &(params->DEREncoding), encodedParams->len,
kmflag);
memcpy(params->DEREncoding.data, encodedParams->data, encodedParams->len);
/* Fill out the rest of the ECParams structure based on
* the encoded params
*/
rv = EC_FillParams(NULL, encodedParams, params, kmflag);
if (rv == SECFailure) {
PORT_FreeArena(NULL, B_TRUE);
return SECFailure;
} else {
*ecparams = params;;
return SECSuccess;
}
}