[openssh.git] / scard-opensc.c

/*
 * Copyright (c) 2002 Juha Yrj�l�.  All rights reserved.
 * Copyright (c) 2001 Markus Friedl.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "includes.h"
#if defined(SMARTCARD) && defined(USE_OPENSC)

#include <openssl/evp.h>
#include <openssl/x509.h>

#include <opensc.h>
#include <opensc-pkcs15.h>

#include "key.h"
#include "log.h"
#include "xmalloc.h"
#include "readpass.h"
#include "scard.h"

#if OPENSSL_VERSION_NUMBER >= 0x00907000L
#define USE_ENGINE
#define RSA_get_default_method RSA_get_default_openssl_method
#else
#endif

#ifdef USE_ENGINE
#include <openssl/engine.h>
#define sc_get_rsa sc_get_engine
#else
#define sc_get_rsa sc_get_rsa_method
#endif

static int sc_reader_id;
static sc_context_t *ctx = NULL;
static sc_card_t *card = NULL;
static sc_pkcs15_card_t *p15card = NULL;

static char *sc_pin = NULL;

struct sc_priv_data
{
	struct sc_pkcs15_id cert_id;
	int ref_count;
};

void
sc_close(void)
{
	if (p15card) {
		sc_pkcs15_unbind(p15card);
		p15card = NULL;
	}
	if (card) {
		sc_disconnect_card(card, 0);
		card = NULL;
	}
	if (ctx) {
		sc_release_context(ctx);
		ctx = NULL;
	}
}

static int 
sc_init(void)
{
	int r;

	r = sc_establish_context(&ctx, "openssh");
	if (r)
		goto err;
	r = sc_connect_card(ctx->reader[sc_reader_id], 0, &card);
	if (r)
		goto err;
	r = sc_pkcs15_bind(card, &p15card);
	if (r)
		goto err;
	return 0;
err:
	sc_close();
	return r;
}

/* private key operations */

static int
sc_prkey_op_init(RSA *rsa, struct sc_pkcs15_object **key_obj_out)
{
	int r;
	struct sc_priv_data *priv;
	struct sc_pkcs15_object *key_obj;
	struct sc_pkcs15_prkey_info *key;
	struct sc_pkcs15_object *pin_obj;
	struct sc_pkcs15_pin_info *pin;

	priv = (struct sc_priv_data *) RSA_get_app_data(rsa);
	if (priv == NULL)
		return -1;
	if (p15card == NULL) {
		sc_close();
		r = sc_init();
		if (r) {
			error("SmartCard init failed: %s", sc_strerror(r));
			goto err;
		}
	}
	r = sc_pkcs15_find_prkey_by_id(p15card, &priv->cert_id, &key_obj);
	if (r) {
		error("Unable to find private key from SmartCard: %s",
		      sc_strerror(r));
		goto err;
	}
	key = key_obj->data;
	r = sc_pkcs15_find_pin_by_auth_id(p15card, &key_obj->auth_id,
					  &pin_obj);
	if (r) {
		error("Unable to find PIN object from SmartCard: %s",
		      sc_strerror(r));
		goto err;
	}
	pin = pin_obj->data;
	r = sc_lock(card);
	if (r) {
		error("Unable to lock smartcard: %s", sc_strerror(r));
		goto err;
	}
	if (sc_pin != NULL) {
		r = sc_pkcs15_verify_pin(p15card, pin, sc_pin,
					 strlen(sc_pin));
		if (r) {
			sc_unlock(card);
			error("PIN code verification failed: %s",
			      sc_strerror(r));
			goto err;
		}
	}
	*key_obj_out = key_obj;
	return 0;
err:
	sc_close();
	return -1;
}

static int
sc_private_decrypt(int flen, u_char *from, u_char *to, RSA *rsa,
    int padding)
{
	struct sc_pkcs15_object *key_obj;
	int r;

	if (padding != RSA_PKCS1_PADDING)
		return -1;	
	r = sc_prkey_op_init(rsa, &key_obj);
	if (r)
		return -1;
	r = sc_pkcs15_decipher(p15card, key_obj, from, flen, to, flen);
	sc_unlock(card);
	if (r < 0) {
		error("sc_pkcs15_decipher() failed: %s", sc_strerror(r));
		goto err;
	}
	return r;
err:
	sc_close();
	return -1;
}

static int
sc_sign(int type, u_char *m, unsigned int m_len,
	unsigned char *sigret, unsigned int *siglen, RSA *rsa)
{
	struct sc_pkcs15_object *key_obj;
	int r;
	unsigned long flags = 0;

	r = sc_prkey_op_init(rsa, &key_obj);
	if (r)
		return -1;
	/* FIXME: length of sigret correct? */
	/* FIXME: check 'type' and modify flags accordingly */
	flags = SC_ALGORITHM_RSA_PAD_PKCS1 | SC_ALGORITHM_RSA_HASH_SHA1;
	r = sc_pkcs15_compute_signature(p15card, key_obj, flags,
					m, m_len, sigret, RSA_size(rsa));
	sc_unlock(card);
	if (r < 0) {
		error("sc_pkcs15_compute_signature() failed: %s",
		      sc_strerror(r));
		goto err;
	}
	*siglen = r;
	return 1;
err:
	sc_close();
	return 0;
}

static int
sc_private_encrypt(int flen, u_char *from, u_char *to, RSA *rsa,
    int padding)
{
	error("Private key encryption not supported");
	return -1;
}

/* called on free */

static int (*orig_finish)(RSA *rsa) = NULL;

static int
sc_finish(RSA *rsa)
{
	struct sc_priv_data *priv;

	priv = RSA_get_app_data(rsa);
	priv->ref_count--;
	if (priv->ref_count == 0) {
		free(priv);
		sc_close();
	}
	if (orig_finish)
		orig_finish(rsa);
	return 1;
}

/* engine for overloading private key operations */

static RSA_METHOD *
sc_get_rsa_method(void)
{
	static RSA_METHOD smart_rsa;
	const RSA_METHOD *def = RSA_get_default_method();

	/* use the OpenSSL version */
	memcpy(&smart_rsa, def, sizeof(smart_rsa));

	smart_rsa.name		= "opensc";

	/* overload */
	smart_rsa.rsa_priv_enc	= sc_private_encrypt;
	smart_rsa.rsa_priv_dec	= sc_private_decrypt;
	smart_rsa.rsa_sign	= sc_sign;

	/* save original */
	orig_finish		= def->finish;
	smart_rsa.finish	= sc_finish;

	return &smart_rsa;
}

#ifdef USE_ENGINE
static ENGINE *
sc_get_engine(void)
{
	static ENGINE *smart_engine = NULL;

	if ((smart_engine = ENGINE_new()) == NULL)
		fatal("ENGINE_new failed");

	ENGINE_set_id(smart_engine, "opensc");
	ENGINE_set_name(smart_engine, "OpenSC");

	ENGINE_set_RSA(smart_engine, sc_get_rsa_method());
	ENGINE_set_DSA(smart_engine, DSA_get_default_openssl_method());
	ENGINE_set_DH(smart_engine, DH_get_default_openssl_method());
	ENGINE_set_RAND(smart_engine, RAND_SSLeay());
	ENGINE_set_BN_mod_exp(smart_engine, BN_mod_exp);

	return smart_engine;
}
#endif

static void
convert_rsa_to_rsa1(Key * in, Key * out)
{
	struct sc_priv_data *priv;
	
	out->rsa->flags = in->rsa->flags;
	out->flags = in->flags;
	RSA_set_method(out->rsa, RSA_get_method(in->rsa));
	BN_copy(out->rsa->n, in->rsa->n);
	BN_copy(out->rsa->e, in->rsa->e);
	priv = RSA_get_app_data(in->rsa);
	priv->ref_count++;
	RSA_set_app_data(out->rsa, priv);
	return;
}

static int 
sc_read_pubkey(Key * k, const struct sc_pkcs15_object *cert_obj)
{
	int r;
	sc_pkcs15_cert_t *cert = NULL;
	struct sc_priv_data *priv = NULL;
	sc_pkcs15_cert_info_t *cinfo = cert_obj->data;

	X509 *x509 = NULL;
	EVP_PKEY *pubkey = NULL;
	u8 *p;
	char *tmp;
	
	debug("sc_read_pubkey() with cert id %02X", cinfo->id.value[0]);
	r = sc_pkcs15_read_certificate(p15card, cinfo, &cert);
	if (r) {
		log("Certificate read failed: %s", sc_strerror(r));
		goto err;
	}
	x509 = X509_new();
	if (x509 == NULL) {
		r = -1; 
		goto err;
	}
	p = cert->data;
	if (!d2i_X509(&x509, &p, cert->data_len)) {
		log("Unable to parse X.509 certificate");
		r = -1;
		goto err;
	}
	sc_pkcs15_free_certificate(cert);
	cert = NULL;
	pubkey = X509_get_pubkey(x509);
	X509_free(x509);
	x509 = NULL;
	if (pubkey->type != EVP_PKEY_RSA) {
		log("Public key is of unknown type");
		r = -1;
		goto err;
	}
	k->rsa = EVP_PKEY_get1_RSA(pubkey);
	EVP_PKEY_free(pubkey);

	k->rsa->flags |= RSA_FLAG_SIGN_VER;
	RSA_set_method(k->rsa, sc_get_rsa_method());
	priv = xmalloc(sizeof(struct sc_priv_data));
	priv->cert_id = cinfo->id;
	priv->ref_count = 1;
	RSA_set_app_data(k->rsa, priv);

	k->flags = KEY_FLAG_EXT;
	tmp = key_fingerprint(k, SSH_FP_MD5, SSH_FP_HEX);
	debug("fingerprint %d %s", key_size(k), tmp);
	xfree(tmp);
	
	return 0;
err:
	if (cert)
		sc_pkcs15_free_certificate(cert);
	if (pubkey)
		EVP_PKEY_free(pubkey);
	if (x509)
		X509_free(x509);
	return r;
}

Key **
sc_get_keys(const char *id, const char *pin)
{
	Key *k, **keys;
	int i, r, real_count = 0, key_count;
	sc_pkcs15_id_t cert_id;
	sc_pkcs15_object_t *certs[32];
	char *buf = xstrdup(id), *p;

	debug("sc_get_keys called: id = %s", id);

	if (sc_pin != NULL)
		xfree(sc_pin);
	sc_pin = (pin == NULL) ? NULL : xstrdup(pin);

	cert_id.len = 0;
	if ((p = strchr(buf, ':')) != NULL) {
		*p = 0;
		p++;
		sc_pkcs15_hex_string_to_id(p, &cert_id);
	}
	r = sscanf(buf, "%d", &sc_reader_id);
	xfree(buf);
	if (r != 1)
		goto err;
	if (p15card == NULL) {
		sc_close();
		r = sc_init();
		if (r) {
			error("Smartcard init failed: %s", sc_strerror(r));
			goto err;
		}
	}
	if (cert_id.len) {
		r = sc_pkcs15_find_cert_by_id(p15card, &cert_id, &certs[0]);
		if (r < 0)
			goto err;
		key_count = 1;
	} else {
		r = sc_pkcs15_get_objects(p15card, SC_PKCS15_TYPE_CERT_X509,
					  certs, 32);
		if (r == 0) {
			log("No certificates found on smartcard");
			r = -1;
			goto err;
		} else if (r < 0) {
			error("Certificate enumeration failed: %s",
			      sc_strerror(r));
			goto err;
		}
		key_count = r;
	}
	/* FIXME: only keep entries with a corresponding private key */
	keys = xmalloc(sizeof(Key *) * (key_count*2+1));
	for (i = 0; i < key_count; i++) {
		k = key_new(KEY_RSA);
		if (k == NULL)
			break;
		r = sc_read_pubkey(k, certs[i]);
		if (r) {
			error("sc_read_pubkey failed: %s", sc_strerror(r));
			key_free(k);
			continue;
		}
		keys[real_count] = k;
		real_count++;
		k = key_new(KEY_RSA1);
		if (k == NULL)
			break;
		convert_rsa_to_rsa1(keys[real_count-1], k);
		keys[real_count] = k;
		real_count++;
	}
	keys[real_count] = NULL;

	return keys;
err:
	sc_close();
	return NULL;
}

int
sc_put_key(Key *prv, const char *id)
{
	error("key uploading not yet supported");
	return -1;
}

#endif /* SMARTCARD */
Commit	Line	Data
295c8801	1	/*
	2	* Copyright (c) 2002 Juha Yrj�l�. All rights reserved.
	3	* Copyright (c) 2001 Markus Friedl.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	17	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#include "includes.h"
	27	#if defined(SMARTCARD) && defined(USE_OPENSC)
	28
	29	#include <openssl/evp.h>
	30	#include <openssl/x509.h>
	31
	32	#include <opensc.h>
	33	#include <opensc-pkcs15.h>
	34
	35	#include "key.h"
	36	#include "log.h"
	37	#include "xmalloc.h"
	38	#include "readpass.h"
	39	#include "scard.h"
	40
	41	#if OPENSSL_VERSION_NUMBER >= 0x00907000L
	42	#define USE_ENGINE
	43	#define RSA_get_default_method RSA_get_default_openssl_method
	44	#else
	45	#endif
	46
	47	#ifdef USE_ENGINE
	48	#include <openssl/engine.h>
	49	#define sc_get_rsa sc_get_engine
	50	#else
	51	#define sc_get_rsa sc_get_rsa_method
	52	#endif
	53
	54	static int sc_reader_id;
	55	static sc_context_t *ctx = NULL;
	56	static sc_card_t *card = NULL;
	57	static sc_pkcs15_card_t *p15card = NULL;
	58
	59	static char *sc_pin = NULL;
	60
	61	struct sc_priv_data
	62	{
	63	struct sc_pkcs15_id cert_id;
	64	int ref_count;
65	};
66
67	void
68	sc_close(void)
69	{
70	if (p15card) {
71	sc_pkcs15_unbind(p15card);
72	p15card = NULL;
73	}
74	if (card) {
75	sc_disconnect_card(card, 0);
76	card = NULL;
77	}
78	if (ctx) {
79	sc_release_context(ctx);
80	ctx = NULL;
81	}
82	}
83
84	static int
85	sc_init(void)
86	{
87	int r;
88
89	r = sc_establish_context(&ctx, "openssh");
90	if (r)
91	goto err;
92	r = sc_connect_card(ctx->reader[sc_reader_id], 0, &card);
93	if (r)
94	goto err;
95	r = sc_pkcs15_bind(card, &p15card);
96	if (r)
97	goto err;
98	return 0;
99	err:
100	sc_close();
101	return r;
102	}
103
104	/* private key operations */
105
106	static int
107	sc_prkey_op_init(RSA rsa, struct sc_pkcs15_object *key_obj_out)
108	{
109	int r;
110	struct sc_priv_data *priv;
111	struct sc_pkcs15_object *key_obj;
112	struct sc_pkcs15_prkey_info *key;
113	struct sc_pkcs15_object *pin_obj;
114	struct sc_pkcs15_pin_info *pin;
115
116	priv = (struct sc_priv_data *) RSA_get_app_data(rsa);
117	if (priv == NULL)
118	return -1;
119	if (p15card == NULL) {
120	sc_close();
121	r = sc_init();
122	if (r) {
123	error("SmartCard init failed: %s", sc_strerror(r));
124	goto err;
125	}
126	}
127	r = sc_pkcs15_find_prkey_by_id(p15card, &priv->cert_id, &key_obj);
128	if (r) {
129	error("Unable to find private key from SmartCard: %s",
130	sc_strerror(r));
131	goto err;
132	}
133	key = key_obj->data;
134	r = sc_pkcs15_find_pin_by_auth_id(p15card, &key_obj->auth_id,
135	&pin_obj);
136	if (r) {
137	error("Unable to find PIN object from SmartCard: %s",
138	sc_strerror(r));
139	goto err;
140	}
141	pin = pin_obj->data;
142	r = sc_lock(card);
143	if (r) {
144	error("Unable to lock smartcard: %s", sc_strerror(r));
145	goto err;
146	}
147	if (sc_pin != NULL) {
148	r = sc_pkcs15_verify_pin(p15card, pin, sc_pin,
149	strlen(sc_pin));
150	if (r) {
151	sc_unlock(card);
152	error("PIN code verification failed: %s",
153	sc_strerror(r));
154	goto err;
155	}
156	}
157	*key_obj_out = key_obj;
158	return 0;
159	err:
160	sc_close();
161	return -1;
162	}
163
164	static int
165	sc_private_decrypt(int flen, u_char from, u_char to, RSA *rsa,
166	int padding)
167	{
168	struct sc_pkcs15_object *key_obj;
169	int r;
170
171	if (padding != RSA_PKCS1_PADDING)
172	return -1;
173	r = sc_prkey_op_init(rsa, &key_obj);
174	if (r)
175	return -1;
176	r = sc_pkcs15_decipher(p15card, key_obj, from, flen, to, flen);
177	sc_unlock(card);
178	if (r < 0) {
179	error("sc_pkcs15_decipher() failed: %s", sc_strerror(r));
180	goto err;
181	}
182	return r;
183	err:
184	sc_close();
185	return -1;
186	}
187
188	static int
189	sc_sign(int type, u_char *m, unsigned int m_len,
190	unsigned char sigret, unsigned int siglen, RSA *rsa)
191	{
192	struct sc_pkcs15_object *key_obj;
193	int r;
194	unsigned long flags = 0;
195
196	r = sc_prkey_op_init(rsa, &key_obj);
197	if (r)
198	return -1;
199	/* FIXME: length of sigret correct? */
200	/* FIXME: check 'type' and modify flags accordingly */
201	flags = SC_ALGORITHM_RSA_PAD_PKCS1 \| SC_ALGORITHM_RSA_HASH_SHA1;
202	r = sc_pkcs15_compute_signature(p15card, key_obj, flags,
203	m, m_len, sigret, RSA_size(rsa));
204	sc_unlock(card);
205	if (r < 0) {
206	error("sc_pkcs15_compute_signature() failed: %s",
207	sc_strerror(r));
208	goto err;
209	}
210	*siglen = r;
211	return 1;
212	err:
213	sc_close();
214	return 0;
215	}
216
217	static int
218	sc_private_encrypt(int flen, u_char from, u_char to, RSA *rsa,
219	int padding)
220	{
221	error("Private key encryption not supported");
222	return -1;
223	}
224
225	/* called on free */
226
227	static int (orig_finish)(RSA rsa) = NULL;
228
229	static int
230	sc_finish(RSA *rsa)
231	{
232	struct sc_priv_data *priv;
233
234	priv = RSA_get_app_data(rsa);
235	priv->ref_count--;
236	if (priv->ref_count == 0) {
237	free(priv);
238	sc_close();
239	}
240	if (orig_finish)
241	orig_finish(rsa);
242	return 1;
243	}
244
245	/* engine for overloading private key operations */
246
247	static RSA_METHOD *
248	sc_get_rsa_method(void)
249	{
250	static RSA_METHOD smart_rsa;
251	const RSA_METHOD *def = RSA_get_default_method();
252
253	/* use the OpenSSL version */
254	memcpy(&smart_rsa, def, sizeof(smart_rsa));
255
256	smart_rsa.name = "opensc";
257
258	/* overload */
259	smart_rsa.rsa_priv_enc = sc_private_encrypt;
260	smart_rsa.rsa_priv_dec = sc_private_decrypt;
261	smart_rsa.rsa_sign = sc_sign;
262
263	/* save original */
264	orig_finish = def->finish;
265	smart_rsa.finish = sc_finish;
266
267	return &smart_rsa;
268	}
269
270	#ifdef USE_ENGINE
271	static ENGINE *
272	sc_get_engine(void)
273	{
274	static ENGINE *smart_engine = NULL;
275
276	if ((smart_engine = ENGINE_new()) == NULL)
277	fatal("ENGINE_new failed");
278
279	ENGINE_set_id(smart_engine, "opensc");
280	ENGINE_set_name(smart_engine, "OpenSC");
281
282	ENGINE_set_RSA(smart_engine, sc_get_rsa_method());
283	ENGINE_set_DSA(smart_engine, DSA_get_default_openssl_method());
284	ENGINE_set_DH(smart_engine, DH_get_default_openssl_method());
285	ENGINE_set_RAND(smart_engine, RAND_SSLeay());
286	ENGINE_set_BN_mod_exp(smart_engine, BN_mod_exp);
287
288	return smart_engine;
289	}
290	#endif
291
292	static void
293	convert_rsa_to_rsa1(Key * in, Key * out)
294	{
295	struct sc_priv_data *priv;
296
297	out->rsa->flags = in->rsa->flags;
298	out->flags = in->flags;
299	RSA_set_method(out->rsa, RSA_get_method(in->rsa));
300	BN_copy(out->rsa->n, in->rsa->n);
301	BN_copy(out->rsa->e, in->rsa->e);
302	priv = RSA_get_app_data(in->rsa);
303	priv->ref_count++;
304	RSA_set_app_data(out->rsa, priv);
305	return;
306	}
307
308	static int
309	sc_read_pubkey(Key * k, const struct sc_pkcs15_object *cert_obj)
310	{
311	int r;
312	sc_pkcs15_cert_t *cert = NULL;
313	struct sc_priv_data *priv = NULL;
314	sc_pkcs15_cert_info_t *cinfo = cert_obj->data;
315
316	X509 *x509 = NULL;
317	EVP_PKEY *pubkey = NULL;
318	u8 *p;
319	char *tmp;
320
321	debug("sc_read_pubkey() with cert id %02X", cinfo->id.value[0]);
322	r = sc_pkcs15_read_certificate(p15card, cinfo, &cert);
323	if (r) {
324	log("Certificate read failed: %s", sc_strerror(r));
325	goto err;
326	}
327	x509 = X509_new();
328	if (x509 == NULL) {
329	r = -1;
330	goto err;
331	}
332	p = cert->data;
333	if (!d2i_X509(&x509, &p, cert->data_len)) {
334	log("Unable to parse X.509 certificate");
335	r = -1;
336	goto err;
337	}
338	sc_pkcs15_free_certificate(cert);
339	cert = NULL;
340	pubkey = X509_get_pubkey(x509);
341	X509_free(x509);
342	x509 = NULL;
343	if (pubkey->type != EVP_PKEY_RSA) {
344	log("Public key is of unknown type");
345	r = -1;
346	goto err;
347	}
348	k->rsa = EVP_PKEY_get1_RSA(pubkey);
349	EVP_PKEY_free(pubkey);
350
351	k->rsa->flags \|= RSA_FLAG_SIGN_VER;
352	RSA_set_method(k->rsa, sc_get_rsa_method());
353	priv = xmalloc(sizeof(struct sc_priv_data));
354	priv->cert_id = cinfo->id;
355	priv->ref_count = 1;
356	RSA_set_app_data(k->rsa, priv);
357
358	k->flags = KEY_FLAG_EXT;
359	tmp = key_fingerprint(k, SSH_FP_MD5, SSH_FP_HEX);
360	debug("fingerprint %d %s", key_size(k), tmp);
361	xfree(tmp);
362
363	return 0;
364	err:
365	if (cert)
366	sc_pkcs15_free_certificate(cert);
367	if (pubkey)
368	EVP_PKEY_free(pubkey);
369	if (x509)
370	X509_free(x509);
371	return r;
372	}
373
374	Key **
375	sc_get_keys(const char id, const char pin)
376	{
377	Key k, *keys;
378	int i, r, real_count = 0, key_count;
379	sc_pkcs15_id_t cert_id;
380	sc_pkcs15_object_t *certs[32];
381	char buf = xstrdup(id), p;
382
383	debug("sc_get_keys called: id = %s", id);
384
385	if (sc_pin != NULL)
386	xfree(sc_pin);
387	sc_pin = (pin == NULL) ? NULL : xstrdup(pin);
388
389	cert_id.len = 0;
390	if ((p = strchr(buf, ':')) != NULL) {
391	*p = 0;
392	p++;
393	sc_pkcs15_hex_string_to_id(p, &cert_id);
394	}
395	r = sscanf(buf, "%d", &sc_reader_id);
396	xfree(buf);
397	if (r != 1)
398	goto err;
399	if (p15card == NULL) {
400	sc_close();
401	r = sc_init();
402	if (r) {
403	error("Smartcard init failed: %s", sc_strerror(r));
404	goto err;
405	}
406	}
407	if (cert_id.len) {
408	r = sc_pkcs15_find_cert_by_id(p15card, &cert_id, &certs[0]);
409	if (r < 0)
410	goto err;
411	key_count = 1;
412	} else {
413	r = sc_pkcs15_get_objects(p15card, SC_PKCS15_TYPE_CERT_X509,
414	certs, 32);
415	if (r == 0) {
416	log("No certificates found on smartcard");
417	r = -1;
418	goto err;
419	} else if (r < 0) {
420	error("Certificate enumeration failed: %s",
421	sc_strerror(r));
422	goto err;
423	}
424	key_count = r;
425	}
426	/* FIXME: only keep entries with a corresponding private key */
427	keys = xmalloc(sizeof(Key ) (key_count*2+1));
428	for (i = 0; i < key_count; i++) {
429	k = key_new(KEY_RSA);
430	if (k == NULL)
431	break;
432	r = sc_read_pubkey(k, certs[i]);
433	if (r) {
434	error("sc_read_pubkey failed: %s", sc_strerror(r));
435	key_free(k);
436	continue;
437	}
438	keys[real_count] = k;
439	real_count++;
440	k = key_new(KEY_RSA1);
441	if (k == NULL)
442	break;
443	convert_rsa_to_rsa1(keys[real_count-1], k);
444	keys[real_count] = k;
445	real_count++;
446	}
447	keys[real_count] = NULL;
448
449	return keys;
450	err:
451	sc_close();
452	return NULL;
453	}
454
455	int
456	sc_put_key(Key prv, const char id)
457	{
458	error("key uploading not yet supported");
459	return -1;
460	}
461
462	#endif /* SMARTCARD */