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pkcs15-pubkey.c
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pkcs15-pubkey.c
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/*
* pkcs15-pubkey.c: PKCS #15 public key functions
*
* Copyright (C) 2002 Juha Yrjölä <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#endif
#ifdef ENABLE_OPENSSL
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
# include <openssl/core_names.h>
# include <openssl/param_build.h>
#endif
#ifndef OPENSSL_NO_EC
#include <openssl/ec.h>
#endif
#endif
#include "internal.h"
#include "asn1.h"
#include "pkcs15.h"
#define C_ASN1_PKINFO_ATTR_SIZE 3
static const struct sc_asn1_entry c_asn1_pkinfo[C_ASN1_PKINFO_ATTR_SIZE] = {
{ "algorithm", SC_ASN1_ALGORITHM_ID, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "subjectPublicKey", SC_ASN1_BIT_STRING_NI, SC_ASN1_TAG_BIT_STRING, SC_ASN1_ALLOC, NULL, NULL},
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_COM_KEY_ATTR_SIZE 6
static const struct sc_asn1_entry c_asn1_com_key_attr[C_ASN1_COM_KEY_ATTR_SIZE] = {
{ "iD", SC_ASN1_PKCS15_ID, SC_ASN1_TAG_OCTET_STRING, 0, NULL, NULL },
{ "usage", SC_ASN1_BIT_FIELD, SC_ASN1_TAG_BIT_STRING, 0, NULL, NULL },
{ "native", SC_ASN1_BOOLEAN, SC_ASN1_TAG_BOOLEAN, SC_ASN1_OPTIONAL, NULL, NULL },
{ "accessFlags", SC_ASN1_BIT_FIELD, SC_ASN1_TAG_BIT_STRING, SC_ASN1_OPTIONAL, NULL, NULL },
{ "keyReference",SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_COM_PUBKEY_ATTR_SIZE 2
static const struct sc_asn1_entry c_asn1_com_pubkey_attr[C_ASN1_COM_PUBKEY_ATTR_SIZE] = {
{ "subjectName", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS,
SC_ASN1_EMPTY_ALLOWED | SC_ASN1_ALLOC | SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_RSAKEY_VALUE_CHOICE_SIZE 3
static const struct sc_asn1_entry c_asn1_rsakey_value_choice[C_ASN1_RSAKEY_VALUE_CHOICE_SIZE] = {
{ "path", SC_ASN1_PATH, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_EMPTY_ALLOWED, NULL, NULL },
{ "direct", SC_ASN1_OCTET_STRING, SC_ASN1_CTX | 0 | SC_ASN1_CONS, SC_ASN1_OPTIONAL | SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_RSAKEY_ATTR_SIZE 4
static const struct sc_asn1_entry c_asn1_rsakey_attr[C_ASN1_RSAKEY_ATTR_SIZE] = {
{ "value", SC_ASN1_CHOICE, 0, 0, NULL, NULL },
{ "modulusLength", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, 0, NULL, NULL },
{ "keyInfo", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_ECKEY_VALUE_CHOICE_SIZE 3
static const struct sc_asn1_entry c_asn1_eckey_value_choice[C_ASN1_ECKEY_VALUE_CHOICE_SIZE] = {
{ "path", SC_ASN1_PATH, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_EMPTY_ALLOWED, NULL, NULL },
{ "direct", SC_ASN1_OCTET_STRING, SC_ASN1_CTX | 0 | SC_ASN1_CONS, SC_ASN1_OPTIONAL | SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_ECKEY_ATTR_SIZE 3
static const struct sc_asn1_entry c_asn1_eckey_attr[C_ASN1_ECKEY_ATTR_SIZE] = {
{ "value", SC_ASN1_CHOICE, 0, 0, NULL, NULL },
{ "keyInfo", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_RSA_TYPE_ATTR_SIZE 2
static const struct sc_asn1_entry c_asn1_rsa_type_attr[C_ASN1_RSA_TYPE_ATTR_SIZE] = {
{ "publicRSAKeyAttributes", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_EC_TYPE_ATTR_SIZE 2
static const struct sc_asn1_entry c_asn1_ec_type_attr[C_ASN1_EC_TYPE_ATTR_SIZE] = {
{ "publicECKeyAttributes", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_GOST3410KEY_ATTR_SIZE 5
static const struct sc_asn1_entry c_asn1_gostr3410key_attr[C_ASN1_GOST3410KEY_ATTR_SIZE] = {
{ "value", SC_ASN1_PATH, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "params_r3410", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, 0, NULL, NULL },
{ "params_r3411", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, SC_ASN1_OPTIONAL, NULL, NULL },
{ "params_28147", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_GOST3410_TYPE_ATTR_SIZE 2
static const struct sc_asn1_entry c_asn1_gostr3410_type_attr[C_ASN1_GOST3410_TYPE_ATTR_SIZE] = {
{ "publicGOSTR3410KeyAttributes", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_PUBKEY_CHOICE_SIZE 4
static const struct sc_asn1_entry c_asn1_pubkey_choice[C_ASN1_PUBKEY_CHOICE_SIZE] = {
{ "publicRSAKey", SC_ASN1_PKCS15_OBJECT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "publicGOSTR3410Key", SC_ASN1_PKCS15_OBJECT, 4 | SC_ASN1_CTX | SC_ASN1_CONS, 0, NULL, NULL },
{ "publicECKey", SC_ASN1_PKCS15_OBJECT, 0 | SC_ASN1_CTX | SC_ASN1_CONS, 0, NULL, NULL },
/*TODO: -DEE not clear EC is needed here as look like it is for pukdf */
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_PUBKEY_SIZE 2
static const struct sc_asn1_entry c_asn1_pubkey[C_ASN1_PUBKEY_SIZE] = {
{ "publicKey", SC_ASN1_CHOICE, 0, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
int sc_pkcs15_pubkey_from_spki_sequence(sc_context_t *ctx, const u8 *buf, size_t buflen, sc_pkcs15_pubkey_t ** outpubkey);
int
sc_pkcs15_decode_pubkey_direct_value(struct sc_pkcs15_card *p15card, struct sc_pkcs15_object *obj)
{
struct sc_context *ctx = p15card->card->ctx;
struct sc_pkcs15_pubkey_info *info = (struct sc_pkcs15_pubkey_info *) obj->data;
LOG_FUNC_CALLED(ctx);
if (obj->content.value == NULL || obj->content.len == 0)
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
if (*obj->content.value == (SC_ASN1_TAG_CONSTRUCTED | SC_ASN1_TAG_SEQUENCE)) {
/* RAW direct value */
sc_log(ctx, "Decoding 'RAW' direct value");
info->direct.raw.value = malloc(obj->content.len);
if (!info->direct.raw.value)
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
memcpy(info->direct.raw.value, obj->content.value, obj->content.len);
info->direct.raw.len = obj->content.len;
/* TODO: encode 'spki' direct value */
}
if (*obj->content.value == (SC_ASN1_TAG_CONTEXT | SC_ASN1_TAG_CONSTRUCTED | 0x01)) {
struct sc_pkcs15_pubkey *pubkey = NULL;
int rv;
/* SPKI direct value */
sc_log(ctx, "Decoding 'SPKI' direct value");
info->direct.spki.value = malloc(obj->content.len);
if (!info->direct.spki.value)
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
memcpy(info->direct.spki.value, obj->content.value, obj->content.len);
info->direct.spki.len = obj->content.len;
rv = sc_pkcs15_pubkey_from_spki_sequence(ctx, info->direct.spki.value, info->direct.spki.len, &pubkey);
LOG_TEST_RET(ctx, rv, "Failed to decode 'SPKI' direct value");
rv = sc_pkcs15_encode_pubkey(ctx, pubkey, &info->direct.raw.value, &info->direct.raw.len);
sc_pkcs15_free_pubkey(pubkey);
LOG_TEST_RET(ctx, rv, "Failed to encode 'RAW' direct value");
}
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
int sc_pkcs15_decode_pukdf_entry(struct sc_pkcs15_card *p15card,
struct sc_pkcs15_object *obj,
const u8 ** buf, size_t *buflen)
{
struct sc_context *ctx = p15card->card->ctx;
struct sc_pkcs15_pubkey_info *info;
int r, gostr3410_params[3];
struct sc_pkcs15_keyinfo_gostparams *keyinfo_gostparams;
size_t usage_len, af_len;
struct sc_pkcs15_der *der = &obj->content;
struct sc_asn1_entry asn1_com_key_attr[C_ASN1_COM_KEY_ATTR_SIZE];
struct sc_asn1_entry asn1_com_pubkey_attr[C_ASN1_COM_PUBKEY_ATTR_SIZE];
struct sc_asn1_entry asn1_rsakey_value_choice[C_ASN1_RSAKEY_VALUE_CHOICE_SIZE];
struct sc_asn1_entry asn1_rsakey_attr[C_ASN1_RSAKEY_ATTR_SIZE];
struct sc_asn1_entry asn1_rsa_type_attr[C_ASN1_RSA_TYPE_ATTR_SIZE];
struct sc_asn1_entry asn1_eckey_value_choice[C_ASN1_ECKEY_VALUE_CHOICE_SIZE];
struct sc_asn1_entry asn1_eckey_attr[C_ASN1_ECKEY_ATTR_SIZE];
struct sc_asn1_entry asn1_ec_type_attr[C_ASN1_EC_TYPE_ATTR_SIZE];
struct sc_asn1_entry asn1_gostr3410key_attr[C_ASN1_GOST3410KEY_ATTR_SIZE];
struct sc_asn1_entry asn1_gostr3410_type_attr[C_ASN1_GOST3410_TYPE_ATTR_SIZE];
struct sc_asn1_entry asn1_pubkey_choice[C_ASN1_PUBKEY_CHOICE_SIZE];
struct sc_asn1_entry asn1_pubkey[C_ASN1_PUBKEY_SIZE];
struct sc_asn1_pkcs15_object rsakey_obj = { obj, asn1_com_key_attr,
asn1_com_pubkey_attr, asn1_rsa_type_attr };
struct sc_asn1_pkcs15_object eckey_obj = { obj, asn1_com_key_attr,
asn1_com_pubkey_attr, asn1_ec_type_attr };
struct sc_asn1_pkcs15_object gostr3410key_obj = { obj, asn1_com_key_attr,
asn1_com_pubkey_attr, asn1_gostr3410_type_attr };
info = calloc(1, sizeof *info);
if (info == NULL) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
usage_len = sizeof(info->usage);
af_len = sizeof(info->access_flags);
sc_copy_asn1_entry(c_asn1_pubkey, asn1_pubkey);
sc_copy_asn1_entry(c_asn1_pubkey_choice, asn1_pubkey_choice);
sc_copy_asn1_entry(c_asn1_rsa_type_attr, asn1_rsa_type_attr);
sc_copy_asn1_entry(c_asn1_rsakey_value_choice, asn1_rsakey_value_choice);
sc_copy_asn1_entry(c_asn1_rsakey_attr, asn1_rsakey_attr);
sc_copy_asn1_entry(c_asn1_ec_type_attr, asn1_ec_type_attr);
sc_copy_asn1_entry(c_asn1_eckey_value_choice, asn1_eckey_value_choice);
sc_copy_asn1_entry(c_asn1_eckey_attr, asn1_eckey_attr);
sc_copy_asn1_entry(c_asn1_gostr3410_type_attr, asn1_gostr3410_type_attr);
sc_copy_asn1_entry(c_asn1_gostr3410key_attr, asn1_gostr3410key_attr);
sc_copy_asn1_entry(c_asn1_com_pubkey_attr, asn1_com_pubkey_attr);
sc_copy_asn1_entry(c_asn1_com_key_attr, asn1_com_key_attr);
sc_format_asn1_entry(asn1_com_pubkey_attr + 0, &info->subject.value, &info->subject.len, 0);
sc_format_asn1_entry(asn1_pubkey_choice + 0, &rsakey_obj, NULL, 0);
sc_format_asn1_entry(asn1_pubkey_choice + 1, &gostr3410key_obj, NULL, 0);
sc_format_asn1_entry(asn1_pubkey_choice + 2, &eckey_obj, NULL, 0);
sc_format_asn1_entry(asn1_rsa_type_attr + 0, asn1_rsakey_attr, NULL, 0);
sc_format_asn1_entry(asn1_rsakey_value_choice + 0, &info->path, NULL, 0);
sc_format_asn1_entry(asn1_rsakey_value_choice + 1, &der->value, &der->len, 0);
sc_format_asn1_entry(asn1_rsakey_attr + 0, asn1_rsakey_value_choice, NULL, 0);
sc_format_asn1_entry(asn1_rsakey_attr + 1, &info->modulus_length, NULL, 0);
sc_format_asn1_entry(asn1_ec_type_attr + 0, asn1_eckey_attr, NULL, 0);
sc_format_asn1_entry(asn1_eckey_value_choice + 0, &info->path, NULL, 0);
sc_format_asn1_entry(asn1_eckey_value_choice + 1, &der->value, &der->len, 0);
sc_format_asn1_entry(asn1_eckey_attr + 0, asn1_eckey_value_choice, NULL, 0);
sc_format_asn1_entry(asn1_gostr3410_type_attr + 0, asn1_gostr3410key_attr, NULL, 0);
sc_format_asn1_entry(asn1_gostr3410key_attr + 0, &info->path, NULL, 0);
sc_format_asn1_entry(asn1_gostr3410key_attr + 1, &gostr3410_params[0], NULL, 0);
sc_format_asn1_entry(asn1_gostr3410key_attr + 2, &gostr3410_params[1], NULL, 0);
sc_format_asn1_entry(asn1_gostr3410key_attr + 3, &gostr3410_params[2], NULL, 0);
sc_format_asn1_entry(asn1_com_key_attr + 0, &info->id, NULL, 0);
sc_format_asn1_entry(asn1_com_key_attr + 1, &info->usage, &usage_len, 0);
sc_format_asn1_entry(asn1_com_key_attr + 2, &info->native, NULL, 0);
sc_format_asn1_entry(asn1_com_key_attr + 3, &info->access_flags, &af_len, 0);
sc_format_asn1_entry(asn1_com_key_attr + 4, &info->key_reference, NULL, 0);
sc_format_asn1_entry(asn1_pubkey + 0, asn1_pubkey_choice, NULL, 0);
/* Fill in defaults */
info->key_reference = -1;
info->native = 1;
memset(gostr3410_params, 0, sizeof(gostr3410_params));
r = sc_asn1_decode(ctx, asn1_pubkey, *buf, *buflen, buf, buflen);
if (r == SC_ERROR_ASN1_END_OF_CONTENTS)
goto err;
LOG_TEST_GOTO_ERR(ctx, r, "ASN.1 decoding failed");
if (asn1_pubkey_choice[0].flags & SC_ASN1_PRESENT) {
obj->type = SC_PKCS15_TYPE_PUBKEY_RSA;
} else if (asn1_pubkey_choice[1].flags & SC_ASN1_PRESENT) {
obj->type = SC_PKCS15_TYPE_PUBKEY_GOSTR3410;
assert(info->modulus_length == 0);
info->modulus_length = SC_PKCS15_GOSTR3410_KEYSIZE;
assert(info->params.len == 0);
info->params.len = sizeof(struct sc_pkcs15_keyinfo_gostparams);
info->params.data = malloc(info->params.len);
if (info->params.data == NULL) {
r = SC_ERROR_OUT_OF_MEMORY;
goto err;
}
assert(sizeof(*keyinfo_gostparams) == info->params.len);
keyinfo_gostparams = info->params.data;
keyinfo_gostparams->gostr3410 = (unsigned int)gostr3410_params[0];
keyinfo_gostparams->gostr3411 = (unsigned int)gostr3410_params[1];
keyinfo_gostparams->gost28147 = (unsigned int)gostr3410_params[2];
}
else if (asn1_pubkey_choice[2].flags & SC_ASN1_PRESENT) {
obj->type = SC_PKCS15_TYPE_PUBKEY_EC;
}
else {
goto err;
}
if (!p15card->app || !p15card->app->ddo.aid.len) {
if (!p15card->file_app) {
r = SC_ERROR_INTERNAL;
goto err;
}
r = sc_pkcs15_make_absolute_path(&p15card->file_app->path, &info->path);
if (r < 0) {
goto err;
}
}
else {
info->path.aid = p15card->app->ddo.aid;
}
sc_log(ctx, "PubKey path '%s'", sc_print_path(&info->path));
/* OpenSC 0.11.4 and older encoded "keyReference" as a negative
value. Fixed in 0.11.5 we need to add a hack, so old cards
continue to work. */
if (info->key_reference < -1)
info->key_reference += 256;
obj->data = info;
info = NULL;
r = sc_pkcs15_decode_pubkey_direct_value(p15card, obj);
if (r < 0) {
info = obj->data;
obj->data = NULL;
}
LOG_TEST_GOTO_ERR(ctx, r, "Decode public key direct value failed");
err:
if (r < 0) {
sc_pkcs15_free_pubkey_info(info);
if (der->len) {
free(der->value);
/* der points to obj->content */
obj->content.value = NULL;
obj->content.len = 0;
}
}
LOG_FUNC_RETURN(ctx, r);
}
int
sc_pkcs15_encode_pukdf_entry(struct sc_context *ctx, const struct sc_pkcs15_object *obj,
unsigned char **buf, size_t *buflen)
{
struct sc_asn1_entry asn1_com_key_attr[C_ASN1_COM_KEY_ATTR_SIZE];
struct sc_asn1_entry asn1_com_pubkey_attr[C_ASN1_COM_PUBKEY_ATTR_SIZE];
struct sc_asn1_entry asn1_rsakey_value_choice[C_ASN1_RSAKEY_VALUE_CHOICE_SIZE];
struct sc_asn1_entry asn1_rsakey_attr[C_ASN1_RSAKEY_ATTR_SIZE];
struct sc_asn1_entry asn1_rsa_type_attr[C_ASN1_RSA_TYPE_ATTR_SIZE];
struct sc_asn1_entry asn1_eckey_value_choice[C_ASN1_ECKEY_VALUE_CHOICE_SIZE];
struct sc_asn1_entry asn1_eckey_attr[C_ASN1_ECKEY_ATTR_SIZE];
struct sc_asn1_entry asn1_ec_type_attr[C_ASN1_EC_TYPE_ATTR_SIZE];
struct sc_asn1_entry asn1_gostr3410key_attr[C_ASN1_GOST3410KEY_ATTR_SIZE];
struct sc_asn1_entry asn1_gostr3410_type_attr[C_ASN1_GOST3410_TYPE_ATTR_SIZE];
struct sc_asn1_entry asn1_pubkey_choice[C_ASN1_PUBKEY_CHOICE_SIZE];
struct sc_asn1_entry asn1_pubkey[C_ASN1_PUBKEY_SIZE];
struct sc_pkcs15_pubkey_info *pubkey = (struct sc_pkcs15_pubkey_info *) obj->data;
struct sc_asn1_pkcs15_object rsakey_obj = {
(struct sc_pkcs15_object *) obj, asn1_com_key_attr, asn1_com_pubkey_attr, asn1_rsa_type_attr
};
struct sc_asn1_pkcs15_object eckey_obj = { (struct sc_pkcs15_object *) obj,
asn1_com_key_attr,
asn1_com_pubkey_attr, asn1_ec_type_attr };
struct sc_asn1_pkcs15_object gostr3410key_obj = { (struct sc_pkcs15_object *) obj,
asn1_com_key_attr,
asn1_com_pubkey_attr, asn1_gostr3410_type_attr };
struct sc_pkcs15_keyinfo_gostparams *keyinfo_gostparams;
int r;
size_t af_len, usage_len;
unsigned char *spki_value = NULL;
sc_copy_asn1_entry(c_asn1_pubkey, asn1_pubkey);
sc_copy_asn1_entry(c_asn1_pubkey_choice, asn1_pubkey_choice);
sc_copy_asn1_entry(c_asn1_rsa_type_attr, asn1_rsa_type_attr);
sc_copy_asn1_entry(c_asn1_rsakey_value_choice, asn1_rsakey_value_choice);
sc_copy_asn1_entry(c_asn1_rsakey_attr, asn1_rsakey_attr);
sc_copy_asn1_entry(c_asn1_ec_type_attr, asn1_ec_type_attr);
sc_copy_asn1_entry(c_asn1_eckey_value_choice, asn1_eckey_value_choice);
sc_copy_asn1_entry(c_asn1_eckey_attr, asn1_eckey_attr);
sc_copy_asn1_entry(c_asn1_gostr3410_type_attr, asn1_gostr3410_type_attr);
sc_copy_asn1_entry(c_asn1_gostr3410key_attr, asn1_gostr3410key_attr);
sc_copy_asn1_entry(c_asn1_com_pubkey_attr, asn1_com_pubkey_attr);
sc_copy_asn1_entry(c_asn1_com_key_attr, asn1_com_key_attr);
switch (obj->type) {
case SC_PKCS15_TYPE_PUBKEY_RSA:
sc_format_asn1_entry(asn1_pubkey_choice + 0, &rsakey_obj, NULL, 1);
sc_format_asn1_entry(asn1_rsa_type_attr + 0, asn1_rsakey_attr, NULL, 1);
if (pubkey->path.len) {
sc_format_asn1_entry(asn1_rsakey_value_choice + 0, &pubkey->path, NULL, 1);
}
else if (pubkey->direct.raw.value && pubkey->direct.raw.len) {
/* In RSAPublicKeyChoice 'raw' value keep it's SEQUENCE tag */
sc_log(ctx, "Encode direct 'RAW' value");
sc_format_asn1_entry(asn1_rsakey_value_choice + 1, pubkey->direct.raw.value, (void *)&pubkey->direct.raw.len, 1);
}
else if (pubkey->direct.spki.value && pubkey->direct.spki.len) {
/* In RSAPublicKeyChoice 'spki' value changes initial SEQUENCE tag for
* CONTEXT [1] constructed SEQUENCE */
sc_log(ctx, "Encode direct 'SPKI' value");
spki_value = malloc(pubkey->direct.spki.len);
if (!spki_value)
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
memcpy(spki_value, pubkey->direct.spki.value, pubkey->direct.spki.len);
*spki_value = (SC_ASN1_TAG_CONTEXT | SC_ASN1_TAG_CONSTRUCTED | 0x01);
sc_format_asn1_entry(asn1_rsakey_value_choice + 1, spki_value, (void *)&pubkey->direct.spki.len, 1);
}
else if (obj->content.value && obj->content.len) {
sc_log(ctx, "Encode 'RAW' object content");
sc_format_asn1_entry(asn1_rsakey_value_choice + 1, obj->content.value, (void *)&obj->content.len, 1);
}
else {
sc_log(ctx, "Use empty path");
sc_format_asn1_entry(asn1_rsakey_value_choice + 0, &pubkey->path, NULL, 1);
}
sc_format_asn1_entry(asn1_rsakey_attr + 0, asn1_rsakey_value_choice, NULL, 1);
sc_format_asn1_entry(asn1_rsakey_attr + 1, &pubkey->modulus_length, NULL, 1);
break;
case SC_PKCS15_TYPE_PUBKEY_GOSTR3410:
sc_format_asn1_entry(asn1_pubkey_choice + 1, &gostr3410key_obj, NULL, 1);
sc_format_asn1_entry(asn1_gostr3410_type_attr + 0, asn1_gostr3410key_attr, NULL, 1);
sc_format_asn1_entry(asn1_gostr3410key_attr + 0, &pubkey->path, NULL, 1);
if (pubkey->params.len == sizeof(*keyinfo_gostparams)) {
keyinfo_gostparams = pubkey->params.data;
sc_format_asn1_entry(asn1_gostr3410key_attr + 1,
&keyinfo_gostparams->gostr3410, NULL, 1);
sc_format_asn1_entry(asn1_gostr3410key_attr + 2,
&keyinfo_gostparams->gostr3411, NULL, 1);
sc_format_asn1_entry(asn1_gostr3410key_attr + 3,
&keyinfo_gostparams->gost28147, NULL, 1);
}
break;
case SC_PKCS15_TYPE_PUBKEY_EC:
sc_format_asn1_entry(asn1_pubkey_choice + 2, &eckey_obj, NULL, 1);
sc_format_asn1_entry(asn1_ec_type_attr + 0, asn1_eckey_attr, NULL, 1);
if (pubkey->path.len) {
sc_format_asn1_entry(asn1_eckey_value_choice + 0, &pubkey->path, NULL, 1);
}
else if (pubkey->direct.spki.value) {
sc_format_asn1_entry(asn1_eckey_value_choice + 1, pubkey->direct.spki.value, (void *)&pubkey->direct.spki.len, 1);
}
else if (pubkey->direct.raw.value) {
sc_format_asn1_entry(asn1_eckey_value_choice + 1, pubkey->direct.raw.value, (void *)&pubkey->direct.raw.len, 1);
LOG_TEST_RET(ctx, SC_ERROR_NOT_IMPLEMENTED, "Needs KeyInfo with reference to algorithm in TokenInfo");
}
else if (obj->content.value) {
sc_format_asn1_entry(asn1_eckey_value_choice + 1, obj->content.value, (void *)&obj->content.len, 1);
LOG_TEST_RET(ctx, SC_ERROR_NOT_IMPLEMENTED, "Needs KeyInfo with reference to algorithm in TokenInfo");
}
sc_format_asn1_entry(asn1_eckey_attr + 0, asn1_eckey_value_choice, NULL, 1);
break;
default:
sc_log(ctx, "Unsupported public key type: %X", obj->type);
LOG_FUNC_RETURN(ctx, SC_ERROR_INTERNAL);
break;
}
sc_format_asn1_entry(asn1_com_key_attr + 0, &pubkey->id, NULL, 1);
usage_len = sizeof(pubkey->usage);
sc_format_asn1_entry(asn1_com_key_attr + 1, &pubkey->usage, &usage_len, 1);
if (pubkey->native == 0)
sc_format_asn1_entry(asn1_com_key_attr + 2, &pubkey->native, NULL, 1);
if (pubkey->access_flags) {
af_len = sizeof(pubkey->access_flags);
sc_format_asn1_entry(asn1_com_key_attr + 3, &pubkey->access_flags, &af_len, 1);
}
if (pubkey->key_reference >= 0)
sc_format_asn1_entry(asn1_com_key_attr + 4, &pubkey->key_reference, NULL, 1);
sc_format_asn1_entry(asn1_pubkey + 0, asn1_pubkey_choice, NULL, 1);
if (pubkey->subject.value && pubkey->subject.len)
sc_format_asn1_entry(asn1_com_pubkey_attr + 0, pubkey->subject.value, &pubkey->subject.len, 1);
else
memset(asn1_com_pubkey_attr, 0, sizeof(asn1_com_pubkey_attr));
r = sc_asn1_encode(ctx, asn1_pubkey, buf, buflen);
sc_log(ctx, "Key path %s", sc_print_path(&pubkey->path));
if (spki_value)
free(spki_value);
return r;
}
#define C_ASN1_PUBLIC_KEY_SIZE 2
static struct sc_asn1_entry c_asn1_public_key[C_ASN1_PUBLIC_KEY_SIZE] = {
{ "publicKeyCoefficients", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_RSA_PUB_COEFFICIENTS_SIZE 3
static struct sc_asn1_entry c_asn1_rsa_pub_coefficients[C_ASN1_RSA_PUB_COEFFICIENTS_SIZE] = {
{ "modulus", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_INTEGER, SC_ASN1_ALLOC|SC_ASN1_UNSIGNED, NULL, NULL },
{ "exponent", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_INTEGER, SC_ASN1_ALLOC|SC_ASN1_UNSIGNED, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
#define C_ASN1_GOSTR3410_PUB_COEFFICIENTS_SIZE 2
static struct sc_asn1_entry c_asn1_gostr3410_pub_coefficients[C_ASN1_GOSTR3410_PUB_COEFFICIENTS_SIZE] = {
{ "xy", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_OCTET_STRING, SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
/* older incorrect implementation may have encoded as OCTET STRING */
/* accept either */
#define C_ASN1_EC_POINTQ_SIZE 3
static struct sc_asn1_entry c_asn1_ec_pointQ[C_ASN1_EC_POINTQ_SIZE] = {
{ "ecpointQ", SC_ASN1_BIT_STRING_NI, SC_ASN1_TAG_BIT_STRING, SC_ASN1_OPTIONAL | SC_ASN1_ALLOC, NULL, NULL },
{ "ecpointQ-OS",SC_ASN1_OCTET_STRING, SC_ASN1_TAG_OCTET_STRING, SC_ASN1_OPTIONAL | SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
int
sc_pkcs15_decode_pubkey_rsa(sc_context_t *ctx, struct sc_pkcs15_pubkey_rsa *key,
const u8 *buf, size_t buflen)
{
struct sc_asn1_entry asn1_public_key[C_ASN1_PUBLIC_KEY_SIZE];
struct sc_asn1_entry asn1_rsa_pub_coefficients[C_ASN1_RSA_PUB_COEFFICIENTS_SIZE];
int r;
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_public_key, asn1_public_key);
sc_format_asn1_entry(asn1_public_key + 0, asn1_rsa_pub_coefficients, NULL, 0);
sc_copy_asn1_entry(c_asn1_rsa_pub_coefficients, asn1_rsa_pub_coefficients);
sc_format_asn1_entry(asn1_rsa_pub_coefficients + 0, &key->modulus.data, &key->modulus.len, 0);
sc_format_asn1_entry(asn1_rsa_pub_coefficients + 1, &key->exponent.data, &key->exponent.len, 0);
r = sc_asn1_decode(ctx, asn1_public_key, buf, buflen, NULL, NULL);
LOG_TEST_RET(ctx, r, "ASN.1 parsing of public key failed");
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
int
sc_pkcs15_encode_pubkey_rsa(sc_context_t *ctx, struct sc_pkcs15_pubkey_rsa *key,
u8 **buf, size_t *buflen)
{
struct sc_asn1_entry asn1_public_key[C_ASN1_PUBLIC_KEY_SIZE];
struct sc_asn1_entry asn1_rsa_pub_coefficients[C_ASN1_RSA_PUB_COEFFICIENTS_SIZE];
int r;
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_public_key, asn1_public_key);
sc_format_asn1_entry(asn1_public_key + 0, asn1_rsa_pub_coefficients, NULL, 1);
sc_copy_asn1_entry(c_asn1_rsa_pub_coefficients, asn1_rsa_pub_coefficients);
sc_format_asn1_entry(asn1_rsa_pub_coefficients + 0, key->modulus.data, &key->modulus.len, 1);
sc_format_asn1_entry(asn1_rsa_pub_coefficients + 1, key->exponent.data, &key->exponent.len, 1);
r = sc_asn1_encode(ctx, asn1_public_key, buf, buflen);
LOG_TEST_RET(ctx, r, "ASN.1 encoding failed");
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
int
sc_pkcs15_decode_pubkey_gostr3410(sc_context_t *ctx, struct sc_pkcs15_pubkey_gostr3410 *key,
const u8 *buf, size_t buflen)
{
struct sc_asn1_entry asn1_gostr3410_pub_coeff[C_ASN1_GOSTR3410_PUB_COEFFICIENTS_SIZE];
int r;
struct sc_object_id param_key = {{ 1, 2, 643, 2, 2, 35, 1, -1}};
struct sc_object_id param_hash = {{ 1, 2, 643, 2, 2, 30, 1, -1}};
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_gostr3410_pub_coefficients, asn1_gostr3410_pub_coeff);
sc_format_asn1_entry(asn1_gostr3410_pub_coeff + 0, &key->xy.data, &key->xy.len, 0);
r = sc_asn1_decode(ctx, asn1_gostr3410_pub_coeff, buf, buflen, NULL, NULL);
LOG_TEST_RET(ctx, r, "ASN.1 parsing of public key failed");
key->params.key = param_key;
key->params.hash = param_hash;
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
int
sc_pkcs15_encode_pubkey_gostr3410(sc_context_t *ctx,
struct sc_pkcs15_pubkey_gostr3410 *key,
u8 **buf, size_t *buflen)
{
struct sc_asn1_entry asn1_gostr3410_pub_coeff[C_ASN1_GOSTR3410_PUB_COEFFICIENTS_SIZE];
int r;
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_gostr3410_pub_coefficients, asn1_gostr3410_pub_coeff);
sc_format_asn1_entry(asn1_gostr3410_pub_coeff + 0, key->xy.data, &key->xy.len, 1);
r = sc_asn1_encode(ctx, asn1_gostr3410_pub_coeff, buf, buflen);
LOG_TEST_RET(ctx, r, "ASN.1 encoding failed");
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
/*
* We are storing the ec_pointQ as u8 string not as DER
* Will accept either BIT STRING or OCTET STRING
*/
int
sc_pkcs15_decode_pubkey_ec(sc_context_t *ctx,
struct sc_pkcs15_pubkey_ec *key,
const u8 *buf, size_t buflen)
{
int r;
u8 * ecpoint_data = NULL;
size_t ecpoint_len = 0;
struct sc_asn1_entry asn1_ec_pointQ[C_ASN1_EC_POINTQ_SIZE];
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_ec_pointQ, asn1_ec_pointQ);
sc_format_asn1_entry(asn1_ec_pointQ + 0, &ecpoint_data, &ecpoint_len, 1);
sc_format_asn1_entry(asn1_ec_pointQ + 1, &ecpoint_data, &ecpoint_len, 1);
r = sc_asn1_decode_choice(ctx, asn1_ec_pointQ, buf, buflen, NULL, NULL);
if (r < 0 || ecpoint_len == 0 || ecpoint_data == NULL) {
free(ecpoint_data);
LOG_FUNC_RETURN(ctx,SC_ERROR_INVALID_ASN1_OBJECT);
}
if (*ecpoint_data != 0x04) {
free(ecpoint_data);
LOG_TEST_RET(ctx, SC_ERROR_NOT_SUPPORTED, "Supported only uncompressed EC pointQ value");
}
key->ecpointQ.len = ecpoint_len;
key->ecpointQ.value = ecpoint_data;
key->params.field_length = (ecpoint_len - 1)/2 * 8;
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
int
sc_pkcs15_encode_pubkey_ec(sc_context_t *ctx, struct sc_pkcs15_pubkey_ec *key,
u8 **buf, size_t *buflen)
{
struct sc_asn1_entry asn1_ec_pointQ[C_ASN1_EC_POINTQ_SIZE];
size_t key_len;
volatile int gdb_test = 0; /* so can reset via gdb for testing new way */
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_ec_pointQ, asn1_ec_pointQ);
if (gdb_test == 1) {
key_len = key->ecpointQ.len * 8; /* encode in bit string */
sc_format_asn1_entry(asn1_ec_pointQ + 0, key->ecpointQ.value, &key_len, 1);
} else {
key_len = key->ecpointQ.len;
sc_format_asn1_entry(asn1_ec_pointQ + 1, key->ecpointQ.value, &key_len, 1);
}
LOG_FUNC_RETURN(ctx,
sc_asn1_encode(ctx, asn1_ec_pointQ, buf, buflen));
}
/*
* all "ec" keys uses same pubkey format, keep this external entrypoint
* keys are just byte strings.
* will accept in either BIT STRING or OCTET STRING
*/
int
sc_pkcs15_decode_pubkey_eddsa(sc_context_t *ctx,
struct sc_pkcs15_pubkey_ec *key,
const u8 *buf, size_t buflen)
{
int r;
u8 * ecpoint_data = NULL;
size_t ecpoint_len = 0;
struct sc_asn1_entry asn1_ec_pointQ[C_ASN1_EC_POINTQ_SIZE];
LOG_FUNC_CALLED(ctx);
sc_copy_asn1_entry(c_asn1_ec_pointQ, asn1_ec_pointQ);
sc_format_asn1_entry(asn1_ec_pointQ + 0, &ecpoint_data, &ecpoint_len, 1);
sc_format_asn1_entry(asn1_ec_pointQ + 1, &ecpoint_data, &ecpoint_len, 1);
r = sc_asn1_decode_choice(ctx, asn1_ec_pointQ, buf, buflen, NULL, NULL);
if (r < 0 || ecpoint_len == 0 || ecpoint_data == NULL) {
free(ecpoint_data);
LOG_FUNC_RETURN(ctx,SC_ERROR_INVALID_ASN1_OBJECT);
}
key->ecpointQ.len = ecpoint_len;
key->ecpointQ.value = ecpoint_data;
key->params.field_length = ecpoint_len * 8;
LOG_FUNC_RETURN(ctx, SC_SUCCESS);
}
/*
* all "ec" keys uses same pubkey format, keep this external entrypoint
*/
int
sc_pkcs15_encode_pubkey_eddsa(sc_context_t *ctx, struct sc_pkcs15_pubkey_ec *key,
u8 **buf, size_t *buflen)
{
/* same format */
return sc_pkcs15_encode_pubkey_ec(ctx, key, buf, buflen);
}
int
sc_pkcs15_encode_pubkey(sc_context_t *ctx, struct sc_pkcs15_pubkey *key,
u8 **buf, size_t *len)
{
if (key->algorithm == SC_ALGORITHM_RSA)
return sc_pkcs15_encode_pubkey_rsa(ctx, &key->u.rsa, buf, len);
if (key->algorithm == SC_ALGORITHM_GOSTR3410)
return sc_pkcs15_encode_pubkey_gostr3410(ctx, &key->u.gostr3410, buf, len);
if (key->algorithm == SC_ALGORITHM_EC)
return sc_pkcs15_encode_pubkey_ec(ctx, &key->u.ec, buf, len);
if (key->algorithm == SC_ALGORITHM_EDDSA || key->algorithm == SC_ALGORITHM_XEDDSA)
return sc_pkcs15_encode_pubkey_eddsa(ctx, &key->u.ec, buf, len);
sc_log(ctx, "Encoding of public key type %lu not supported", key->algorithm);
LOG_FUNC_RETURN(ctx, SC_ERROR_NOT_SUPPORTED);
}
static const struct sc_asn1_entry c_asn1_spki_key_items[] = {
{ "algorithm", SC_ASN1_ALGORITHM_ID, SC_ASN1_CONS| SC_ASN1_TAG_SEQUENCE, 0, NULL, NULL},
{ "key", SC_ASN1_BIT_STRING_NI, SC_ASN1_TAG_BIT_STRING, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
static const struct sc_asn1_entry c_asn1_spki_key[] = {
{ "publicKey", SC_ASN1_STRUCT, SC_ASN1_CONS | SC_ASN1_TAG_SEQUENCE, 0, NULL, NULL},
{ NULL, 0, 0, 0, NULL, NULL }
};
/*
* Encode a pubkey as a SPKI, useful for pkcs15-tool, and for PKCS#15 files.
*/
int
sc_pkcs15_encode_pubkey_as_spki(sc_context_t *ctx, struct sc_pkcs15_pubkey *pubkey,
u8 **buf, size_t *len)
{
int r = 0;
struct sc_asn1_entry asn1_spki_key[2], asn1_spki_key_items[3];
struct sc_pkcs15_u8 pkey;
size_t key_len;
LOG_FUNC_CALLED(ctx);
pkey.value = NULL;
pkey.len = 0;
sc_log(ctx, "Encoding public key with algorithm %lu", pubkey->algorithm);
if (!pubkey->alg_id) {
pubkey->alg_id = calloc(1, sizeof(struct sc_algorithm_id));
if (!pubkey->alg_id)
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
sc_init_oid(&pubkey->alg_id->oid);
pubkey->alg_id->algorithm = pubkey->algorithm;
}
switch (pubkey->algorithm) {
case SC_ALGORITHM_EC:
case SC_ALGORITHM_EDDSA:
case SC_ALGORITHM_XEDDSA:
/*
* most keys, but not EC have only one encoding.
* For a SPKI, the ecpoint is placed directly in the
* BIT STRING
*/
key_len = pubkey->u.ec.ecpointQ.len * 8;
pkey.value = pubkey->u.ec.ecpointQ.value;
pkey.len = 0; /* flag as do not delete */
if (pubkey->u.ec.params.named_curve || pubkey->u.ec.params.der.value) {
struct sc_ec_parameters *ec_params = NULL;
r = sc_pkcs15_fix_ec_parameters(ctx, &pubkey->u.ec.params);
LOG_TEST_RET(ctx, r, "failed to fix EC parameters");
ec_params = calloc(1, sizeof(struct sc_ec_parameters));
if (!ec_params)
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
ec_params->type = 1;
ec_params->der.value = calloc(1, pubkey->u.ec.params.der.len);
if (!ec_params->der.value) {
free(ec_params);
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
}
memcpy(ec_params->der.value, pubkey->u.ec.params.der.value, pubkey->u.ec.params.der.len);
ec_params->der.len = pubkey->u.ec.params.der.len;
/* This could have been already allocated: avoid memory leak */
sc_asn1_clear_algorithm_id(pubkey->alg_id);
pubkey->alg_id->params = ec_params;
}
break;
case SC_ALGORITHM_GOSTR3410:
/* TODO is this needed? does it cause mem leak? */
pubkey->alg_id->params = &pubkey->u.gostr3410.params;
r = sc_pkcs15_encode_pubkey(ctx, pubkey, &pkey.value, &pkey.len);
key_len = pkey.len * 8;
break;
default:
r = sc_pkcs15_encode_pubkey(ctx, pubkey, &pkey.value, &pkey.len);
key_len = pkey.len * 8;
break;
}
if (r == 0) {
sc_copy_asn1_entry(c_asn1_spki_key, asn1_spki_key);
sc_copy_asn1_entry(c_asn1_spki_key_items, asn1_spki_key_items);
sc_format_asn1_entry(asn1_spki_key + 0, asn1_spki_key_items, NULL, 1);
sc_format_asn1_entry(asn1_spki_key_items + 0, pubkey->alg_id, NULL, 1);
sc_format_asn1_entry(asn1_spki_key_items + 1, pkey.value, &key_len, 1);
r = sc_asn1_encode(ctx, asn1_spki_key, buf, len);
}
if (pkey.len && pkey.value)
free(pkey.value);
LOG_FUNC_RETURN(ctx, r);
}
int
sc_pkcs15_decode_pubkey(sc_context_t *ctx, struct sc_pkcs15_pubkey *key,
const u8 *buf, size_t len)
{
if (key->algorithm == SC_ALGORITHM_RSA)
return sc_pkcs15_decode_pubkey_rsa(ctx, &key->u.rsa, buf, len);
if (key->algorithm == SC_ALGORITHM_GOSTR3410)
return sc_pkcs15_decode_pubkey_gostr3410(ctx, &key->u.gostr3410, buf, len);
if (key->algorithm == SC_ALGORITHM_EC)
return sc_pkcs15_decode_pubkey_ec(ctx, &key->u.ec, buf, len);
if (key->algorithm == SC_ALGORITHM_EDDSA || key->algorithm == SC_ALGORITHM_XEDDSA)
return sc_pkcs15_decode_pubkey_eddsa(ctx, &key->u.ec, buf, len);
sc_log(ctx, "Decoding of public key type %lu not supported", key->algorithm);
return SC_ERROR_NOT_SUPPORTED;
}
/*
* Read public key.
*/
int
sc_pkcs15_read_pubkey(struct sc_pkcs15_card *p15card, const struct sc_pkcs15_object *obj,
struct sc_pkcs15_pubkey **out)
{
struct sc_context *ctx;
const struct sc_pkcs15_pubkey_info *info = NULL;
struct sc_pkcs15_pubkey *pubkey = NULL;
unsigned char *data = NULL;
size_t len;
int algorithm, r;
int private_obj;
if (p15card == NULL || p15card->card == NULL || p15card->card->ops == NULL
|| obj == NULL || out == NULL) {
return SC_ERROR_INVALID_ARGUMENTS;
}
ctx = p15card->card->ctx;
LOG_FUNC_CALLED(ctx);
sc_log(ctx, "Public key type 0x%X", obj->type);
switch (obj->type) {
case SC_PKCS15_TYPE_PUBKEY_RSA:
algorithm = SC_ALGORITHM_RSA;
break;
case SC_PKCS15_TYPE_PUBKEY_GOSTR3410:
algorithm = SC_ALGORITHM_GOSTR3410;
break;
case SC_PKCS15_TYPE_PUBKEY_EC:
algorithm = SC_ALGORITHM_EC;
break;
case SC_PKCS15_TYPE_PUBKEY_EDDSA:
algorithm = SC_ALGORITHM_EDDSA;
break;
case SC_PKCS15_TYPE_PUBKEY_XEDDSA:
algorithm = SC_ALGORITHM_XEDDSA;
break;
default:
LOG_TEST_RET(ctx, SC_ERROR_NOT_SUPPORTED, "Unsupported public key type.");
}
info = (const struct sc_pkcs15_pubkey_info *) obj->data;
pubkey = calloc(1, sizeof(struct sc_pkcs15_pubkey));
if (pubkey == NULL) {
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
}
pubkey->algorithm = algorithm;
/* starting from SPKI direct value
in a compact form it presents complete public key data */
if (info->direct.spki.value && info->direct.spki.len) {
sc_log(ctx, "Using direct SPKI value, tag 0x%X", *(info->direct.spki.value));
r = sc_pkcs15_pubkey_from_spki_sequence(ctx, info->direct.spki.value, info->direct.spki.len, &pubkey);
LOG_TEST_GOTO_ERR(ctx, r, "Failed to decode 'SPKI' direct value");
}
else if (info->direct.raw.value && info->direct.raw.len) {
sc_log(ctx, "Using direct RAW value");
r = sc_pkcs15_decode_pubkey(ctx, pubkey, info->direct.raw.value, info->direct.raw.len);
LOG_TEST_GOTO_ERR(ctx, r, "Failed to decode 'RAW' direct value");
sc_log(ctx, "TODO: for EC keys 'raw' data needs to be completed with referenced algorithm from TokenInfo");
}
else if (obj->content.value && obj->content.len) {
sc_log(ctx, "Using object content");
r = sc_pkcs15_decode_pubkey(ctx, pubkey, obj->content.value, obj->content.len);
LOG_TEST_GOTO_ERR(ctx, r, "Failed to decode object content value");
sc_log(ctx, "TODO: for EC keys 'raw' data needs to be completed with referenced algorithm from TokenInfo");
}
else if (p15card->card->ops->read_public_key) {
sc_log(ctx, "Call card specific 'read-public-key' handle");
r = p15card->card->ops->read_public_key(p15card->card, algorithm,
(struct sc_path *)&info->path, info->key_reference, (unsigned)info->modulus_length,
&data, &len);
LOG_TEST_GOTO_ERR(ctx, r, "Card specific 'read-public' procedure failed.");
r = sc_pkcs15_decode_pubkey(ctx, pubkey, data, len);
LOG_TEST_GOTO_ERR(ctx, r, "Decode public key error");
}
else if (info->path.len) {
sc_log(ctx, "Read from EF and decode");
private_obj = obj->flags & SC_PKCS15_CO_FLAG_PRIVATE;
r = sc_pkcs15_read_file(p15card, &info->path, &data, &len, private_obj);
LOG_TEST_GOTO_ERR(ctx, r, "Failed to read public key file.");
if ((algorithm == SC_ALGORITHM_EC || algorithm == SC_ALGORITHM_EDDSA || algorithm == SC_ALGORITHM_XEDDSA)
&& *data == (SC_ASN1_TAG_SEQUENCE | SC_ASN1_TAG_CONSTRUCTED))
r = sc_pkcs15_pubkey_from_spki_sequence(ctx, data, len, &pubkey);
else
r = sc_pkcs15_decode_pubkey(ctx, pubkey, data, len);
LOG_TEST_GOTO_ERR(ctx, r, "Decode public key error");
}
else {
r = SC_ERROR_NOT_IMPLEMENTED;
LOG_TEST_GOTO_ERR(ctx, r, "No way to get public key");
}
err:
if (r) {
sc_pkcs15_free_pubkey(pubkey);
} else
*out = pubkey;
free(data);
LOG_FUNC_RETURN(ctx, r);
}
static int
sc_pkcs15_dup_bignum (struct sc_pkcs15_bignum *dst, struct sc_pkcs15_bignum *src)
{
if (!dst || !src) {
return SC_ERROR_INVALID_ARGUMENTS;
}
if (src->data && src->len) {
dst->data = calloc(1, src->len);
if (!dst->data)
return SC_ERROR_OUT_OF_MEMORY;
memcpy(dst->data, src->data, src->len);
dst->len = src->len;
}
return 0;
}