2 * Copyright (c) 2002 Juha Yrjölä. All rights reserved.
3 * Copyright (c) 2001 Markus Friedl.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
27 #if defined(SMARTCARD) && defined(USE_OPENSC)
29 #include <openssl/evp.h>
30 #include <openssl/x509.h>
32 #include <opensc/opensc.h>
33 #include <opensc/pkcs15.h>
41 #if OPENSSL_VERSION_NUMBER < 0x00907000L && defined(CRYPTO_LOCK_ENGINE)
43 #define RSA_get_default_method RSA_get_default_openssl_method
48 #include <openssl/engine.h>
49 #define sc_get_rsa sc_get_engine
51 #define sc_get_rsa sc_get_rsa_method
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;
59 static char *sc_pin = NULL;
63 struct sc_pkcs15_id cert_id;
71 sc_pkcs15_unbind(p15card);
75 sc_disconnect_card(card, 0);
79 sc_release_context(ctx);
89 r = sc_establish_context(&ctx, "openssh");
92 r = sc_connect_card(ctx->reader[sc_reader_id], 0, &card);
95 r = sc_pkcs15_bind(card, &p15card);
104 /* private key operations */
107 sc_prkey_op_init(RSA *rsa, struct sc_pkcs15_object **key_obj_out)
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;
116 priv = (struct sc_priv_data *) RSA_get_app_data(rsa);
119 if (p15card == NULL) {
123 error("SmartCard init failed: %s", sc_strerror(r));
127 r = sc_pkcs15_find_prkey_by_id(p15card, &priv->cert_id, &key_obj);
129 error("Unable to find private key from SmartCard: %s",
134 r = sc_pkcs15_find_pin_by_auth_id(p15card, &key_obj->auth_id,
136 if (r == SC_ERROR_OBJECT_NOT_FOUND) {
137 /* no pin required */
139 *key_obj_out = key_obj;
142 error("Unable to find PIN object from SmartCard: %s",
149 error("Unable to lock smartcard: %s", sc_strerror(r));
152 if (sc_pin != NULL) {
153 r = sc_pkcs15_verify_pin(p15card, pin, sc_pin,
157 error("PIN code verification failed: %s",
162 *key_obj_out = key_obj;
170 sc_private_decrypt(int flen, u_char *from, u_char *to, RSA *rsa,
173 struct sc_pkcs15_object *key_obj;
176 if (padding != RSA_PKCS1_PADDING)
178 r = sc_prkey_op_init(rsa, &key_obj);
181 r = sc_pkcs15_decipher(p15card, key_obj, SC_ALGORITHM_RSA_PAD_PKCS1,
182 from, flen, to, flen);
185 error("sc_pkcs15_decipher() failed: %s", sc_strerror(r));
195 sc_sign(int type, u_char *m, unsigned int m_len,
196 unsigned char *sigret, unsigned int *siglen, RSA *rsa)
198 struct sc_pkcs15_object *key_obj;
200 unsigned long flags = 0;
202 r = sc_prkey_op_init(rsa, &key_obj);
205 /* FIXME: length of sigret correct? */
206 /* FIXME: check 'type' and modify flags accordingly */
207 flags = SC_ALGORITHM_RSA_PAD_PKCS1 | SC_ALGORITHM_RSA_HASH_SHA1;
208 r = sc_pkcs15_compute_signature(p15card, key_obj, flags,
209 m, m_len, sigret, RSA_size(rsa));
212 error("sc_pkcs15_compute_signature() failed: %s",
224 sc_private_encrypt(int flen, u_char *from, u_char *to, RSA *rsa,
227 error("Private key encryption not supported");
233 static int (*orig_finish)(RSA *rsa) = NULL;
238 struct sc_priv_data *priv;
240 priv = RSA_get_app_data(rsa);
242 if (priv->ref_count == 0) {
251 /* engine for overloading private key operations */
254 sc_get_rsa_method(void)
256 static RSA_METHOD smart_rsa;
257 const RSA_METHOD *def = RSA_get_default_method();
259 /* use the OpenSSL version */
260 memcpy(&smart_rsa, def, sizeof(smart_rsa));
262 smart_rsa.name = "opensc";
265 smart_rsa.rsa_priv_enc = sc_private_encrypt;
266 smart_rsa.rsa_priv_dec = sc_private_decrypt;
267 smart_rsa.rsa_sign = sc_sign;
270 orig_finish = def->finish;
271 smart_rsa.finish = sc_finish;
280 static ENGINE *smart_engine = NULL;
282 if ((smart_engine = ENGINE_new()) == NULL)
283 fatal("ENGINE_new failed");
285 ENGINE_set_id(smart_engine, "opensc");
286 ENGINE_set_name(smart_engine, "OpenSC");
288 ENGINE_set_RSA(smart_engine, sc_get_rsa_method());
289 ENGINE_set_DSA(smart_engine, DSA_get_default_openssl_method());
290 ENGINE_set_DH(smart_engine, DH_get_default_openssl_method());
291 ENGINE_set_RAND(smart_engine, RAND_SSLeay());
292 ENGINE_set_BN_mod_exp(smart_engine, BN_mod_exp);
299 convert_rsa_to_rsa1(Key * in, Key * out)
301 struct sc_priv_data *priv;
303 out->rsa->flags = in->rsa->flags;
304 out->flags = in->flags;
305 RSA_set_method(out->rsa, RSA_get_method(in->rsa));
306 BN_copy(out->rsa->n, in->rsa->n);
307 BN_copy(out->rsa->e, in->rsa->e);
308 priv = RSA_get_app_data(in->rsa);
310 RSA_set_app_data(out->rsa, priv);
315 sc_read_pubkey(Key * k, const struct sc_pkcs15_object *cert_obj)
318 sc_pkcs15_cert_t *cert = NULL;
319 struct sc_priv_data *priv = NULL;
320 sc_pkcs15_cert_info_t *cinfo = cert_obj->data;
323 EVP_PKEY *pubkey = NULL;
327 debug("sc_read_pubkey() with cert id %02X", cinfo->id.value[0]);
328 r = sc_pkcs15_read_certificate(p15card, cinfo, &cert);
330 logit("Certificate read failed: %s", sc_strerror(r));
339 if (!d2i_X509(&x509, &p, cert->data_len)) {
340 logit("Unable to parse X.509 certificate");
344 sc_pkcs15_free_certificate(cert);
346 pubkey = X509_get_pubkey(x509);
349 if (pubkey->type != EVP_PKEY_RSA) {
350 logit("Public key is of unknown type");
354 k->rsa = EVP_PKEY_get1_RSA(pubkey);
355 EVP_PKEY_free(pubkey);
357 k->rsa->flags |= RSA_FLAG_SIGN_VER;
358 RSA_set_method(k->rsa, sc_get_rsa_method());
359 priv = xmalloc(sizeof(struct sc_priv_data));
360 priv->cert_id = cinfo->id;
362 RSA_set_app_data(k->rsa, priv);
364 k->flags = KEY_FLAG_EXT;
365 tmp = key_fingerprint(k, SSH_FP_MD5, SSH_FP_HEX);
366 debug("fingerprint %d %s", key_size(k), tmp);
372 sc_pkcs15_free_certificate(cert);
374 EVP_PKEY_free(pubkey);
381 sc_get_keys(const char *id, const char *pin)
384 int i, r, real_count = 0, key_count;
385 sc_pkcs15_id_t cert_id;
386 sc_pkcs15_object_t *certs[32];
387 char *buf = xstrdup(id), *p;
389 debug("sc_get_keys called: id = %s", id);
393 sc_pin = (pin == NULL) ? NULL : xstrdup(pin);
396 if ((p = strchr(buf, ':')) != NULL) {
399 sc_pkcs15_hex_string_to_id(p, &cert_id);
401 r = sscanf(buf, "%d", &sc_reader_id);
405 if (p15card == NULL) {
409 error("Smartcard init failed: %s", sc_strerror(r));
414 r = sc_pkcs15_find_cert_by_id(p15card, &cert_id, &certs[0]);
419 r = sc_pkcs15_get_objects(p15card, SC_PKCS15_TYPE_CERT_X509,
422 logit("No certificates found on smartcard");
426 error("Certificate enumeration failed: %s",
432 /* FIXME: only keep entries with a corresponding private key */
433 keys = xmalloc(sizeof(Key *) * (key_count*2+1));
434 for (i = 0; i < key_count; i++) {
435 k = key_new(KEY_RSA);
438 r = sc_read_pubkey(k, certs[i]);
440 error("sc_read_pubkey failed: %s", sc_strerror(r));
444 keys[real_count] = k;
446 k = key_new(KEY_RSA1);
449 convert_rsa_to_rsa1(keys[real_count-1], k);
450 keys[real_count] = k;
453 keys[real_count] = NULL;
462 sc_put_key(Key *prv, const char *id)
464 error("key uploading not yet supported");
468 #endif /* SMARTCARD */