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627 lines
17 KiB
627 lines
17 KiB
/* |
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project |
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* 2006. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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|
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#include <stdio.h> |
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#include "cryptlib.h" |
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#include <openssl/x509.h> |
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#include <openssl/ec.h> |
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#include <openssl/bn.h> |
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#ifndef OPENSSL_NO_CMS |
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# include <openssl/cms.h> |
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#endif |
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#include "asn1_locl.h" |
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|
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static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key) |
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{ |
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const EC_GROUP *group; |
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int nid; |
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if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) { |
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ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS); |
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return 0; |
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} |
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if (EC_GROUP_get_asn1_flag(group) |
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&& (nid = EC_GROUP_get_curve_name(group))) |
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/* we have a 'named curve' => just set the OID */ |
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{ |
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*ppval = OBJ_nid2obj(nid); |
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*pptype = V_ASN1_OBJECT; |
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} else { /* explicit parameters */ |
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|
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ASN1_STRING *pstr = NULL; |
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pstr = ASN1_STRING_new(); |
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if (!pstr) |
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return 0; |
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pstr->length = i2d_ECParameters(ec_key, &pstr->data); |
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if (pstr->length <= 0) { |
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ASN1_STRING_free(pstr); |
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ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB); |
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return 0; |
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} |
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*ppval = pstr; |
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*pptype = V_ASN1_SEQUENCE; |
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} |
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return 1; |
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} |
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|
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static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
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{ |
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EC_KEY *ec_key = pkey->pkey.ec; |
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void *pval = NULL; |
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int ptype; |
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unsigned char *penc = NULL, *p; |
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int penclen; |
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|
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if (!eckey_param2type(&ptype, &pval, ec_key)) { |
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ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB); |
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return 0; |
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} |
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penclen = i2o_ECPublicKey(ec_key, NULL); |
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if (penclen <= 0) |
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goto err; |
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penc = OPENSSL_malloc(penclen); |
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if (!penc) |
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goto err; |
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p = penc; |
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penclen = i2o_ECPublicKey(ec_key, &p); |
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if (penclen <= 0) |
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goto err; |
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if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC), |
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ptype, pval, penc, penclen)) |
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return 1; |
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err: |
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if (ptype == V_ASN1_OBJECT) |
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ASN1_OBJECT_free(pval); |
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else |
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ASN1_STRING_free(pval); |
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if (penc) |
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OPENSSL_free(penc); |
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return 0; |
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} |
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|
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static EC_KEY *eckey_type2param(int ptype, void *pval) |
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{ |
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EC_KEY *eckey = NULL; |
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if (ptype == V_ASN1_SEQUENCE) { |
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ASN1_STRING *pstr = pval; |
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const unsigned char *pm = NULL; |
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int pmlen; |
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pm = pstr->data; |
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pmlen = pstr->length; |
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if (!(eckey = d2i_ECParameters(NULL, &pm, pmlen))) { |
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ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); |
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goto ecerr; |
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} |
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} else if (ptype == V_ASN1_OBJECT) { |
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ASN1_OBJECT *poid = pval; |
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EC_GROUP *group; |
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|
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/* |
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* type == V_ASN1_OBJECT => the parameters are given by an asn1 OID |
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*/ |
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if ((eckey = EC_KEY_new()) == NULL) { |
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ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE); |
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goto ecerr; |
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} |
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group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid)); |
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if (group == NULL) |
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goto ecerr; |
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EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE); |
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if (EC_KEY_set_group(eckey, group) == 0) |
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goto ecerr; |
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EC_GROUP_free(group); |
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} else { |
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ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); |
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goto ecerr; |
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} |
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return eckey; |
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ecerr: |
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if (eckey) |
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EC_KEY_free(eckey); |
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return NULL; |
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} |
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static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
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{ |
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const unsigned char *p = NULL; |
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void *pval; |
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int ptype, pklen; |
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EC_KEY *eckey = NULL; |
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X509_ALGOR *palg; |
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if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) |
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return 0; |
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X509_ALGOR_get0(NULL, &ptype, &pval, palg); |
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eckey = eckey_type2param(ptype, pval); |
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if (!eckey) { |
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ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB); |
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return 0; |
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} |
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/* We have parameters now set public key */ |
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if (!o2i_ECPublicKey(&eckey, &p, pklen)) { |
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ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR); |
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goto ecerr; |
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} |
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EVP_PKEY_assign_EC_KEY(pkey, eckey); |
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return 1; |
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ecerr: |
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if (eckey) |
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EC_KEY_free(eckey); |
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return 0; |
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} |
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static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
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{ |
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int r; |
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const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec); |
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const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec), |
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*pb = EC_KEY_get0_public_key(b->pkey.ec); |
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r = EC_POINT_cmp(group, pa, pb, NULL); |
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if (r == 0) |
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return 1; |
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if (r == 1) |
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return 0; |
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return -2; |
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} |
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static int eckey_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
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{ |
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const unsigned char *p = NULL; |
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void *pval; |
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int ptype, pklen; |
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EC_KEY *eckey = NULL; |
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X509_ALGOR *palg; |
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if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) |
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return 0; |
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X509_ALGOR_get0(NULL, &ptype, &pval, palg); |
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eckey = eckey_type2param(ptype, pval); |
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if (!eckey) |
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goto ecliberr; |
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/* We have parameters now set private key */ |
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if (!d2i_ECPrivateKey(&eckey, &p, pklen)) { |
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ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR); |
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goto ecerr; |
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} |
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/* calculate public key (if necessary) */ |
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if (EC_KEY_get0_public_key(eckey) == NULL) { |
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const BIGNUM *priv_key; |
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const EC_GROUP *group; |
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EC_POINT *pub_key; |
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/* |
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* the public key was not included in the SEC1 private key => |
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* calculate the public key |
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*/ |
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group = EC_KEY_get0_group(eckey); |
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pub_key = EC_POINT_new(group); |
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if (pub_key == NULL) { |
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ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); |
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goto ecliberr; |
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} |
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if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) { |
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EC_POINT_free(pub_key); |
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ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); |
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goto ecliberr; |
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} |
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priv_key = EC_KEY_get0_private_key(eckey); |
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if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL)) { |
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EC_POINT_free(pub_key); |
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ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); |
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goto ecliberr; |
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} |
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if (EC_KEY_set_public_key(eckey, pub_key) == 0) { |
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EC_POINT_free(pub_key); |
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ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); |
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goto ecliberr; |
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} |
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EC_POINT_free(pub_key); |
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} |
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EVP_PKEY_assign_EC_KEY(pkey, eckey); |
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return 1; |
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ecliberr: |
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ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); |
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ecerr: |
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if (eckey) |
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EC_KEY_free(eckey); |
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return 0; |
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} |
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static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
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{ |
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EC_KEY *ec_key; |
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unsigned char *ep, *p; |
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int eplen, ptype; |
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void *pval; |
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unsigned int tmp_flags, old_flags; |
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|
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ec_key = pkey->pkey.ec; |
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|
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if (!eckey_param2type(&ptype, &pval, ec_key)) { |
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ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR); |
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return 0; |
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} |
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/* set the private key */ |
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/* |
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* do not include the parameters in the SEC1 private key see PKCS#11 |
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* 12.11 |
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*/ |
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old_flags = EC_KEY_get_enc_flags(ec_key); |
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tmp_flags = old_flags | EC_PKEY_NO_PARAMETERS; |
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EC_KEY_set_enc_flags(ec_key, tmp_flags); |
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eplen = i2d_ECPrivateKey(ec_key, NULL); |
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if (!eplen) { |
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EC_KEY_set_enc_flags(ec_key, old_flags); |
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ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); |
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return 0; |
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} |
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ep = (unsigned char *)OPENSSL_malloc(eplen); |
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if (!ep) { |
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EC_KEY_set_enc_flags(ec_key, old_flags); |
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ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
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return 0; |
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} |
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p = ep; |
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if (!i2d_ECPrivateKey(ec_key, &p)) { |
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EC_KEY_set_enc_flags(ec_key, old_flags); |
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OPENSSL_free(ep); |
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ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); |
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return 0; |
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} |
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/* restore old encoding flags */ |
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EC_KEY_set_enc_flags(ec_key, old_flags); |
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|
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if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0, |
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ptype, pval, ep, eplen)) |
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return 0; |
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|
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return 1; |
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} |
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static int int_ec_size(const EVP_PKEY *pkey) |
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{ |
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return ECDSA_size(pkey->pkey.ec); |
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} |
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|
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static int ec_bits(const EVP_PKEY *pkey) |
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{ |
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BIGNUM *order = BN_new(); |
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const EC_GROUP *group; |
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int ret; |
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|
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if (!order) { |
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ERR_clear_error(); |
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return 0; |
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} |
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group = EC_KEY_get0_group(pkey->pkey.ec); |
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if (!EC_GROUP_get_order(group, order, NULL)) { |
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ERR_clear_error(); |
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return 0; |
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} |
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|
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ret = BN_num_bits(order); |
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BN_free(order); |
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return ret; |
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} |
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|
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static int ec_missing_parameters(const EVP_PKEY *pkey) |
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{ |
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if (EC_KEY_get0_group(pkey->pkey.ec) == NULL) |
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return 1; |
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return 0; |
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} |
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|
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static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) |
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{ |
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EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec)); |
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if (group == NULL) |
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return 0; |
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if (EC_KEY_set_group(to->pkey.ec, group) == 0) |
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return 0; |
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EC_GROUP_free(group); |
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return 1; |
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} |
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|
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static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
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{ |
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const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec), |
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*group_b = EC_KEY_get0_group(b->pkey.ec); |
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if (EC_GROUP_cmp(group_a, group_b, NULL)) |
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return 0; |
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else |
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return 1; |
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} |
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|
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static void int_ec_free(EVP_PKEY *pkey) |
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{ |
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EC_KEY_free(pkey->pkey.ec); |
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} |
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|
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static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype) |
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{ |
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unsigned char *buffer = NULL; |
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const char *ecstr; |
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size_t buf_len = 0, i; |
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int ret = 0, reason = ERR_R_BIO_LIB; |
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BIGNUM *pub_key = NULL, *order = NULL; |
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BN_CTX *ctx = NULL; |
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const EC_GROUP *group; |
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const EC_POINT *public_key; |
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const BIGNUM *priv_key; |
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|
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if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) { |
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reason = ERR_R_PASSED_NULL_PARAMETER; |
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goto err; |
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} |
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|
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ctx = BN_CTX_new(); |
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if (ctx == NULL) { |
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reason = ERR_R_MALLOC_FAILURE; |
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goto err; |
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} |
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|
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if (ktype > 0) { |
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public_key = EC_KEY_get0_public_key(x); |
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if (public_key != NULL) { |
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if ((pub_key = EC_POINT_point2bn(group, public_key, |
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EC_KEY_get_conv_form(x), NULL, |
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ctx)) == NULL) { |
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reason = ERR_R_EC_LIB; |
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goto err; |
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} |
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buf_len = (size_t)BN_num_bytes(pub_key); |
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} |
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} |
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|
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if (ktype == 2) { |
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priv_key = EC_KEY_get0_private_key(x); |
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if (priv_key && (i = (size_t)BN_num_bytes(priv_key)) > buf_len) |
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buf_len = i; |
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} else |
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priv_key = NULL; |
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|
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if (ktype > 0) { |
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buf_len += 10; |
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if ((buffer = OPENSSL_malloc(buf_len)) == NULL) { |
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reason = ERR_R_MALLOC_FAILURE; |
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goto err; |
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} |
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} |
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if (ktype == 2) |
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ecstr = "Private-Key"; |
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else if (ktype == 1) |
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ecstr = "Public-Key"; |
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else |
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ecstr = "ECDSA-Parameters"; |
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|
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if (!BIO_indent(bp, off, 128)) |
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goto err; |
|
if ((order = BN_new()) == NULL) |
|
goto err; |
|
if (!EC_GROUP_get_order(group, order, NULL)) |
|
goto err; |
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if (BIO_printf(bp, "%s: (%d bit)\n", ecstr, BN_num_bits(order)) <= 0) |
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goto err; |
|
|
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if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key, |
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buffer, off)) |
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goto err; |
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if ((pub_key != NULL) && !ASN1_bn_print(bp, "pub: ", pub_key, |
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buffer, off)) |
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goto err; |
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if (!ECPKParameters_print(bp, group, off)) |
|
goto err; |
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ret = 1; |
|
err: |
|
if (!ret) |
|
ECerr(EC_F_DO_EC_KEY_PRINT, reason); |
|
if (pub_key) |
|
BN_free(pub_key); |
|
if (order) |
|
BN_free(order); |
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if (ctx) |
|
BN_CTX_free(ctx); |
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if (buffer != NULL) |
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OPENSSL_free(buffer); |
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return (ret); |
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} |
|
|
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static int eckey_param_decode(EVP_PKEY *pkey, |
|
const unsigned char **pder, int derlen) |
|
{ |
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EC_KEY *eckey; |
|
if (!(eckey = d2i_ECParameters(NULL, pder, derlen))) { |
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ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB); |
|
return 0; |
|
} |
|
EVP_PKEY_assign_EC_KEY(pkey, eckey); |
|
return 1; |
|
} |
|
|
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static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder) |
|
{ |
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return i2d_ECParameters(pkey->pkey.ec, pder); |
|
} |
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|
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static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
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ASN1_PCTX *ctx) |
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{ |
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return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0); |
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} |
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|
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static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
|
ASN1_PCTX *ctx) |
|
{ |
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return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1); |
|
} |
|
|
|
static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
|
ASN1_PCTX *ctx) |
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{ |
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return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2); |
|
} |
|
|
|
static int old_ec_priv_decode(EVP_PKEY *pkey, |
|
const unsigned char **pder, int derlen) |
|
{ |
|
EC_KEY *ec; |
|
if (!(ec = d2i_ECPrivateKey(NULL, pder, derlen))) { |
|
ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR); |
|
return 0; |
|
} |
|
EVP_PKEY_assign_EC_KEY(pkey, ec); |
|
return 1; |
|
} |
|
|
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static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) |
|
{ |
|
return i2d_ECPrivateKey(pkey->pkey.ec, pder); |
|
} |
|
|
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static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
|
{ |
|
switch (op) { |
|
case ASN1_PKEY_CTRL_PKCS7_SIGN: |
|
if (arg1 == 0) { |
|
int snid, hnid; |
|
X509_ALGOR *alg1, *alg2; |
|
PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); |
|
if (alg1 == NULL || alg1->algorithm == NULL) |
|
return -1; |
|
hnid = OBJ_obj2nid(alg1->algorithm); |
|
if (hnid == NID_undef) |
|
return -1; |
|
if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) |
|
return -1; |
|
X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); |
|
} |
|
return 1; |
|
#ifndef OPENSSL_NO_CMS |
|
case ASN1_PKEY_CTRL_CMS_SIGN: |
|
if (arg1 == 0) { |
|
int snid, hnid; |
|
X509_ALGOR *alg1, *alg2; |
|
CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); |
|
if (alg1 == NULL || alg1->algorithm == NULL) |
|
return -1; |
|
hnid = OBJ_obj2nid(alg1->algorithm); |
|
if (hnid == NID_undef) |
|
return -1; |
|
if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) |
|
return -1; |
|
X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); |
|
} |
|
return 1; |
|
#endif |
|
|
|
case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
|
*(int *)arg2 = NID_sha1; |
|
return 2; |
|
|
|
default: |
|
return -2; |
|
|
|
} |
|
|
|
} |
|
|
|
const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = { |
|
EVP_PKEY_EC, |
|
EVP_PKEY_EC, |
|
0, |
|
"EC", |
|
"OpenSSL EC algorithm", |
|
|
|
eckey_pub_decode, |
|
eckey_pub_encode, |
|
eckey_pub_cmp, |
|
eckey_pub_print, |
|
|
|
eckey_priv_decode, |
|
eckey_priv_encode, |
|
eckey_priv_print, |
|
|
|
int_ec_size, |
|
ec_bits, |
|
|
|
eckey_param_decode, |
|
eckey_param_encode, |
|
ec_missing_parameters, |
|
ec_copy_parameters, |
|
ec_cmp_parameters, |
|
eckey_param_print, |
|
0, |
|
|
|
int_ec_free, |
|
ec_pkey_ctrl, |
|
old_ec_priv_decode, |
|
old_ec_priv_encode |
|
};
|
|
|