298 lines
8.8 KiB
C
298 lines
8.8 KiB
C
/**
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* PKCS15 emulation layer for DNIe card.
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*
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* Copyright (C) 2011, Andre Zepezauer <andre.zepezauer@student.uni-halle.de>
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* Copyright (C) 2011, Juan Antonio Martinez <jonsito@terra.es>
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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 <stdlib.h>
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#include <string.h>
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "libopensc/log.h"
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#include "libopensc/asn1.h"
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#include "libopensc/pkcs15.h"
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#include "libopensc/cwa14890.h"
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#include "libopensc/cwa-dnie.h"
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/* Card driver related */
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#if defined(ENABLE_OPENSSL) && defined(ENABLE_SM)
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extern int dnie_match_card(struct sc_card *card);
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/* Helper functions to get the pkcs15 stuff bound. */
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static
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int dump_ef(sc_card_t * card, const char *path, u8 * buf, size_t * buf_len)
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{
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int rv;
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sc_file_t *file = NULL;
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sc_path_t scpath;
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sc_format_path(path, &scpath);
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rv = sc_select_file(card, &scpath, &file);
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if (rv < 0) {
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sc_file_free(file);
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return rv;
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}
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if (file->size > *buf_len) {
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sc_file_free(file);
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return SC_ERROR_BUFFER_TOO_SMALL;
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}
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rv = sc_read_binary(card, 0, buf, file->size, 0);
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sc_file_free(file);
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if (rv < 0)
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return rv;
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*buf_len = rv;
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return SC_SUCCESS;
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}
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static const struct sc_asn1_entry c_asn1_odf[] = {
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{"privateKeys", SC_ASN1_STRUCT, SC_ASN1_CTX | 0 | SC_ASN1_CONS, 0, NULL,
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NULL},
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{"publicKeys", SC_ASN1_STRUCT, SC_ASN1_CTX | 1 | SC_ASN1_CONS, 0, NULL,
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NULL},
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{"trustedPublicKeys", SC_ASN1_STRUCT, SC_ASN1_CTX | 2 | SC_ASN1_CONS, 0,
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NULL, NULL},
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{"secretKeys", SC_ASN1_STRUCT, SC_ASN1_CTX | 3 | SC_ASN1_CONS, 0, NULL,
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NULL},
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{"certificates", SC_ASN1_STRUCT, SC_ASN1_CTX | 4 | SC_ASN1_CONS, 0,
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NULL, NULL},
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{"trustedCertificates", SC_ASN1_STRUCT, SC_ASN1_CTX | 5 | SC_ASN1_CONS,
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0, NULL, NULL},
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{"usefulCertificates", SC_ASN1_STRUCT, SC_ASN1_CTX | 6 | SC_ASN1_CONS,
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0, NULL, NULL},
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{"dataObjects", SC_ASN1_STRUCT, SC_ASN1_CTX | 7 | SC_ASN1_CONS, 0, NULL,
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NULL},
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{"authObjects", SC_ASN1_STRUCT, SC_ASN1_CTX | 8 | SC_ASN1_CONS, 0, NULL,
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NULL},
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{NULL, 0, 0, 0, NULL, NULL}
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};
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static const unsigned int odf_indexes[] = {
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SC_PKCS15_PRKDF,
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SC_PKCS15_PUKDF,
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SC_PKCS15_PUKDF_TRUSTED,
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SC_PKCS15_SKDF,
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SC_PKCS15_CDF,
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SC_PKCS15_CDF_TRUSTED,
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SC_PKCS15_CDF_USEFUL,
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SC_PKCS15_DODF,
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SC_PKCS15_AODF,
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};
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static
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int parse_odf(const u8 * buf, size_t buflen, struct sc_pkcs15_card *p15card)
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{
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const u8 *p = buf;
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size_t left = buflen;
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int r, i, type;
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sc_path_t path;
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struct sc_asn1_entry asn1_obj_or_path[] = {
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{"path", SC_ASN1_PATH, SC_ASN1_CONS | SC_ASN1_SEQUENCE, 0,
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&path, NULL},
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{NULL, 0, 0, 0, NULL, NULL}
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};
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struct sc_asn1_entry asn1_odf[10];
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sc_path_t path_prefix;
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sc_format_path("3F005015", &path_prefix);
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sc_copy_asn1_entry(c_asn1_odf, asn1_odf);
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for (i = 0; asn1_odf[i].name != NULL; i++)
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sc_format_asn1_entry(asn1_odf + i, asn1_obj_or_path, NULL, 0);
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while (left > 0) {
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r = sc_asn1_decode_choice(p15card->card->ctx, asn1_odf, p, left,
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&p, &left);
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if (r == SC_ERROR_ASN1_END_OF_CONTENTS)
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break;
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if (r < 0)
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return r;
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type = r;
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r = sc_pkcs15_make_absolute_path(&path_prefix, &path);
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if (r < 0)
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return r;
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r = sc_pkcs15_add_df(p15card, odf_indexes[type], &path);
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if (r)
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return r;
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}
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return 0;
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}
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static int sc_pkcs15emu_dnie_init(sc_pkcs15_card_t * p15card)
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{
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u8 buf[1024];
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sc_pkcs15_df_t *df;
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sc_pkcs15_object_t *p15_obj;
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size_t len = sizeof(buf);
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int rv;
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struct sc_pkcs15_cert_info *p15_info = NULL;
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sc_context_t *ctx = p15card->card->ctx;
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LOG_FUNC_CALLED(ctx);
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/* Check for correct card driver (i.e. iso7816) */
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if (strcmp(p15card->card->driver->short_name, "dnie") != 0)
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return SC_ERROR_WRONG_CARD;
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/* Check for correct card atr */
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if (dnie_match_card(p15card->card) != 1)
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return SC_ERROR_WRONG_CARD;
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/* The two keys inside DNIe 3.0 needs login before performing any signature.
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* They are CKA_ALWAYS_AUTHENTICATE although they are not tagged like that.
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* For the moment caching is forced if 3.0 is detected to make it work properly. */
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if (p15card->card->atr.value[15] >= DNIE_30_VERSION) {
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p15card->opts.use_pin_cache = 1;
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p15card->opts.pin_cache_counter = DNIE_30_CACHE_COUNTER;
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sc_log(ctx, "DNIe 3.0 detected - PKCS#15 options reset: use_file_cache=%d use_pin_cache=%d pin_cache_counter=%d pin_cache_ignore_user_consent=%d",
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p15card->opts.use_file_cache,
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p15card->opts.use_pin_cache,
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p15card->opts.pin_cache_counter,
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p15card->opts.pin_cache_ignore_user_consent);
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}
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/* Set root path of this application */
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sc_file_free(p15card->file_app);
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p15card->file_app = sc_file_new();
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if (NULL == p15card->file_app)
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LOG_FUNC_RETURN(ctx, SC_ERROR_NOT_ENOUGH_MEMORY);
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sc_format_path("3F00", &p15card->file_app->path);
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/* Load TokenInfo */
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rv = dump_ef(p15card->card, "3F0050155032", buf, &len);
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if (rv != SC_SUCCESS) {
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sc_log(ctx, "Reading of EF.TOKENINFO failed: %d", rv);
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LOG_FUNC_RETURN(ctx, rv);
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}
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rv = sc_pkcs15_parse_tokeninfo(p15card->card->ctx, p15card->tokeninfo,
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buf, len);
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if (rv != SC_SUCCESS) {
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sc_log(ctx, "Decoding of EF.TOKENINFO failed: %d", rv);
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LOG_FUNC_RETURN(ctx, rv);
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}
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/* Only accept the original stuff */
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if (strcmp(p15card->tokeninfo->manufacturer_id, "DGP-FNMT") != 0)
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LOG_FUNC_RETURN(ctx, SC_ERROR_WRONG_CARD);
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/* Load ODF */
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rv = dump_ef(p15card->card, "3F0050155031", buf, &len);
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if (rv != SC_SUCCESS) {
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sc_log(ctx, "Reading of ODF failed: %d", rv);
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LOG_FUNC_RETURN(ctx, rv);
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}
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rv = parse_odf(buf, len, p15card);
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if (rv != SC_SUCCESS) {
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sc_log(ctx, "Decoding of ODF failed: %d", rv);
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LOG_FUNC_RETURN(ctx, rv);
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}
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/* Decode EF.PrKDF, EF.PuKDF and EF.CDF */
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for (df = p15card->df_list; df != NULL; df = df->next) {
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if (df->type == SC_PKCS15_PRKDF) {
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rv = sc_pkcs15_parse_df(p15card, df);
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if (rv != SC_SUCCESS) {
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sc_log(ctx,
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"Decoding of EF.PrKDF (%s) failed: %d",
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sc_print_path(&df->path), rv);
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}
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}
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if (df->type == SC_PKCS15_PUKDF) {
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rv = sc_pkcs15_parse_df(p15card, df);
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if (rv != SC_SUCCESS) {
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sc_log(ctx,
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"Decoding of EF.PuKDF (%s) failed: %d",
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sc_print_path(&df->path), rv);
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}
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}
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if (df->type == SC_PKCS15_CDF) {
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rv = sc_pkcs15_parse_df(p15card, df);
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if (rv != SC_SUCCESS) {
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sc_log(ctx,
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"Decoding of EF.CDF (%s) failed: %d",
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sc_print_path(&df->path), rv);
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}
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}
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if (df->type == SC_PKCS15_DODF) {
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rv = sc_pkcs15_parse_df(p15card, df);
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if (rv != SC_SUCCESS) {
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sc_log(ctx,
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"Decoding of EF.DODF (%s) failed: %d",
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sc_print_path(&df->path), rv);
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}
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}
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}
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/* Perform required fixes */
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p15_obj = p15card->obj_list;
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while (p15_obj != NULL) {
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/* Add missing 'auth_id' to private objects */
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if ((p15_obj->flags & SC_PKCS15_CO_FLAG_PRIVATE)
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&& (p15_obj->auth_id.len == 0)) {
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p15_obj->auth_id.value[0] = 0x01;
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p15_obj->auth_id.len = 1;
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};
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/* Set path count to -1 for public certificates, as they
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will need to be decompressed and read_binary()'d, so
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we make sure we end up reading the file->size and not the
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path->count which is the compressed size on newer
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DNIe versions */
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if ( p15_obj->df && (p15_obj->df->type == SC_PKCS15_CDF) ) {
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p15_info = (struct sc_pkcs15_cert_info *) p15_obj ->data;
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p15_info ->path.count = -1;
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}
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/* Remove found public keys as cannot be read_binary()'d */
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if ( p15_obj->df && (p15_obj->df->type == SC_PKCS15_PUKDF) ) {
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sc_pkcs15_object_t *puk = p15_obj;
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p15_obj = p15_obj->next;
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sc_pkcs15_remove_object(p15card, puk);
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sc_pkcs15_free_object(puk);
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} else {
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p15_obj = p15_obj->next;
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}
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}
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LOG_FUNC_RETURN(ctx, SC_SUCCESS);
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}
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#endif
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/****************************************/
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/* public functions for in-built module */
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/****************************************/
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int sc_pkcs15emu_dnie_init_ex(sc_pkcs15_card_t * p15card,
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struct sc_aid *aid)
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{
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int r=SC_SUCCESS;
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sc_context_t *ctx = p15card->card->ctx;
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LOG_FUNC_CALLED(ctx);
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#if defined(ENABLE_OPENSSL) && defined(ENABLE_SM)
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/* check for proper card */
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r = dnie_match_card(p15card->card);
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if (r == 0)
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LOG_FUNC_RETURN(ctx, SC_ERROR_WRONG_CARD);
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/* ok: initialize and return */
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LOG_FUNC_RETURN(ctx, sc_pkcs15emu_dnie_init(p15card));
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#else
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r = SC_ERROR_WRONG_CARD;
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LOG_FUNC_RETURN(ctx, r);
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#endif
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}
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