2002-03-03 00:32:28 +00:00
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/*
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* pkcs15-pubkey.c: PKCS #15 public key functions
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*
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* Copyright (C) 2002 Juha Yrj<EFBFBD>l<EFBFBD> <juha.yrjola@iki.fi>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sc-internal.h"
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#include "opensc-pkcs15.h"
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#include "sc-asn1.h"
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#include "sc-log.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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static const struct sc_asn1_entry c_asn1_com_key_attr[] = {
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{ "iD", SC_ASN1_PKCS15_ID, ASN1_OCTET_STRING, 0, NULL },
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{ "usage", SC_ASN1_BIT_STRING, ASN1_BIT_STRING, 0, NULL },
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{ "native", SC_ASN1_BOOLEAN, ASN1_BOOLEAN, SC_ASN1_OPTIONAL, NULL },
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{ "accessFlags", SC_ASN1_BIT_STRING, ASN1_BIT_STRING, SC_ASN1_OPTIONAL, NULL },
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{ "keyReference",SC_ASN1_INTEGER, ASN1_INTEGER, SC_ASN1_OPTIONAL, NULL },
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{ NULL }
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};
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static const struct sc_asn1_entry c_asn1_com_pubkey_attr[] = {
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/* FIXME */
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{ NULL }
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};
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static const struct sc_asn1_entry c_asn1_rsakey_attr[] = {
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{ "value", SC_ASN1_PATH, ASN1_SEQUENCE | SC_ASN1_CONS, 0, NULL },
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{ "modulusLength", SC_ASN1_INTEGER, ASN1_INTEGER, 0, NULL },
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{ "keyInfo", SC_ASN1_INTEGER, ASN1_INTEGER, SC_ASN1_OPTIONAL, NULL },
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{ NULL }
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};
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static const struct sc_asn1_entry c_asn1_type_attr[] = {
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2002-03-05 09:30:01 +00:00
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{ "publicRSAKeyAttributes", SC_ASN1_STRUCT, ASN1_SEQUENCE | SC_ASN1_CONS, 0, NULL },
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2002-03-03 00:32:28 +00:00
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{ NULL }
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};
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static const struct sc_asn1_entry c_asn1_pubkey[] = {
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{ "publicRSAKey", SC_ASN1_PKCS15_OBJECT, ASN1_SEQUENCE | SC_ASN1_CONS, 0, NULL },
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{ NULL }
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};
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int sc_pkcs15_decode_pukdf_entry(struct sc_pkcs15_card *p15card,
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struct sc_pkcs15_object *obj,
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const u8 ** buf, size_t *buflen)
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{
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struct sc_context *ctx = p15card->card->ctx;
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struct sc_pkcs15_pubkey_info info;
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int r;
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int usage_len = sizeof(info.usage);
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int af_len = sizeof(info.access_flags);
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struct sc_asn1_entry asn1_com_key_attr[6], asn1_com_pubkey_attr[1];
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struct sc_asn1_entry asn1_rsakey_attr[4], asn1_type_attr[2];
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struct sc_asn1_entry asn1_pubkey[2];
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struct sc_asn1_pkcs15_object pubkey_obj = { obj, asn1_com_key_attr,
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asn1_com_pubkey_attr, asn1_type_attr };
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sc_copy_asn1_entry(c_asn1_pubkey, asn1_pubkey);
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sc_copy_asn1_entry(c_asn1_type_attr, asn1_type_attr);
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sc_copy_asn1_entry(c_asn1_rsakey_attr, asn1_rsakey_attr);
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sc_copy_asn1_entry(c_asn1_com_pubkey_attr, asn1_com_pubkey_attr);
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sc_copy_asn1_entry(c_asn1_com_key_attr, asn1_com_key_attr);
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sc_format_asn1_entry(asn1_pubkey + 0, &pubkey_obj, NULL, 0);
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sc_format_asn1_entry(asn1_type_attr + 0, asn1_rsakey_attr, NULL, 0);
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sc_format_asn1_entry(asn1_rsakey_attr + 0, &info.path, NULL, 0);
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sc_format_asn1_entry(asn1_rsakey_attr + 1, &info.modulus_length, NULL, 0);
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sc_format_asn1_entry(asn1_com_key_attr + 0, &info.id, NULL, 0);
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sc_format_asn1_entry(asn1_com_key_attr + 1, &info.usage, &usage_len, 0);
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sc_format_asn1_entry(asn1_com_key_attr + 2, &info.native, NULL, 0);
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sc_format_asn1_entry(asn1_com_key_attr + 3, &info.access_flags, &af_len, 0);
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sc_format_asn1_entry(asn1_com_key_attr + 4, &info.key_reference, NULL, 0);
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/* Fill in defaults */
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memset(&info, 0, sizeof(info));
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info.key_reference = -1;
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info.native = 1;
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r = sc_asn1_decode(ctx, asn1_pubkey, *buf, *buflen, buf, buflen);
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if (r == SC_ERROR_ASN1_END_OF_CONTENTS)
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return r;
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SC_TEST_RET(ctx, r, "ASN.1 decoding failed");
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obj->type = SC_PKCS15_TYPE_PUBKEY_RSA;
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obj->data = malloc(sizeof(info));
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if (obj->data == NULL)
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SC_FUNC_RETURN(ctx, 0, SC_ERROR_OUT_OF_MEMORY);
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memcpy(obj->data, &info, sizeof(info));
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return 0;
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}
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int sc_pkcs15_encode_pukdf_entry(struct sc_context *ctx,
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const struct sc_pkcs15_object *obj,
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u8 **buf, size_t *buflen)
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{
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struct sc_asn1_entry asn1_com_key_attr[6], asn1_com_pubkey_attr[1];
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struct sc_asn1_entry asn1_rsakey_attr[4], asn1_type_attr[2];
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struct sc_asn1_entry asn1_pubkey[2];
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struct sc_pkcs15_pubkey_info *pubkey =
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(struct sc_pkcs15_pubkey_info *) obj->data;
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struct sc_asn1_pkcs15_object pubkey_obj = { (struct sc_pkcs15_object *) obj,
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asn1_com_key_attr,
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asn1_com_pubkey_attr, asn1_type_attr };
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int r;
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int af_len, usage_len;
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sc_copy_asn1_entry(c_asn1_pubkey, asn1_pubkey);
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sc_copy_asn1_entry(c_asn1_type_attr, asn1_type_attr);
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sc_copy_asn1_entry(c_asn1_rsakey_attr, asn1_rsakey_attr);
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sc_copy_asn1_entry(c_asn1_com_pubkey_attr, asn1_com_pubkey_attr);
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sc_copy_asn1_entry(c_asn1_com_key_attr, asn1_com_key_attr);
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sc_format_asn1_entry(asn1_pubkey + 0, &pubkey_obj, NULL, 1);
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sc_format_asn1_entry(asn1_type_attr + 0, asn1_rsakey_attr, NULL, 1);
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sc_format_asn1_entry(asn1_rsakey_attr + 0, &pubkey->path, NULL, 1);
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sc_format_asn1_entry(asn1_rsakey_attr + 1, &pubkey->modulus_length, NULL, 1);
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sc_format_asn1_entry(asn1_com_key_attr + 0, &pubkey->id, NULL, 1);
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usage_len = _sc_count_bit_string_size(&pubkey->usage, sizeof(pubkey->usage));
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sc_format_asn1_entry(asn1_com_key_attr + 1, &pubkey->usage, &usage_len, 1);
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if (pubkey->native == 0)
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sc_format_asn1_entry(asn1_com_key_attr + 2, &pubkey->native, NULL, 1);
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if (pubkey->access_flags) {
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af_len = _sc_count_bit_string_size(&pubkey->access_flags, sizeof(pubkey->access_flags));
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sc_format_asn1_entry(asn1_com_key_attr + 3, &pubkey->access_flags, &af_len, 1);
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}
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if (pubkey->key_reference >= 0)
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sc_format_asn1_entry(asn1_com_key_attr + 4, &pubkey->key_reference, NULL, 1);
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r = sc_asn1_encode(ctx, asn1_pubkey, buf, buflen);
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return r;
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}
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