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-rw-r--r--scard-opensc.c532
1 files changed, 0 insertions, 532 deletions
diff --git a/scard-opensc.c b/scard-opensc.c
deleted file mode 100644
index 36dae05..0000000
--- a/scard-opensc.c
+++ /dev/null
@@ -1,532 +0,0 @@
-/*
- * Copyright (c) 2002 Juha Yrjölä. 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 <sys/types.h>
-
-#include <openssl/evp.h>
-#include <openssl/x509.h>
-
-#include <stdarg.h>
-#include <string.h>
-
-#include <opensc/opensc.h>
-#include <opensc/pkcs15.h>
-
-#include "key.h"
-#include "log.h"
-#include "xmalloc.h"
-#include "misc.h"
-#include "scard.h"
-
-#if OPENSSL_VERSION_NUMBER < 0x00907000L && defined(CRYPTO_LOCK_ENGINE)
-#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;
- if (sc_reader_id >= ctx->reader_count) {
- r = SC_ERROR_NO_READERS_FOUND;
- error("Illegal reader number %d (max %d)", sc_reader_id,
- ctx->reader_count -1);
- 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,
- unsigned int usage)
-{
- 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_usage(p15card, &priv->cert_id,
- usage, &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 == SC_ERROR_OBJECT_NOT_FOUND) {
- /* no pin required */
- r = sc_lock(card);
- if (r) {
- error("Unable to lock smartcard: %s", sc_strerror(r));
- goto err;
- }
- *key_obj_out = key_obj;
- return 0;
- } else 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;
-}
-
-#define SC_USAGE_DECRYPT SC_PKCS15_PRKEY_USAGE_DECRYPT | \
- SC_PKCS15_PRKEY_USAGE_UNWRAP
-
-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, SC_USAGE_DECRYPT);
- if (r)
- return -1;
- r = sc_pkcs15_decipher(p15card, key_obj, SC_ALGORITHM_RSA_PAD_PKCS1,
- 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;
-}
-
-#define SC_USAGE_SIGN SC_PKCS15_PRKEY_USAGE_SIGN | \
- SC_PKCS15_PRKEY_USAGE_SIGNRECOVER
-
-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;
-
- /* XXX: sc_prkey_op_init will search for a pkcs15 private
- * key object with the sign or signrecover usage flag set.
- * If the signing key has only the non-repudiation flag set
- * the key will be rejected as using a non-repudiation key
- * for authentication is not recommended. Note: This does not
- * prevent the use of a non-repudiation key for authentication
- * if the sign or signrecover flag is set as well.
- */
- r = sc_prkey_op_init(rsa, &key_obj, SC_USAGE_SIGN);
- 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) {
- logit("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)) {
- logit("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) {
- logit("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) {
- logit("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;
- }
- if (key_count > 1024)
- fatal("Too many keys (%u), expected <= 1024", key_count);
- keys = xcalloc(key_count * 2 + 1, sizeof(Key *));
- for (i = 0; i < key_count; i++) {
- sc_pkcs15_object_t *tmp_obj = NULL;
- cert_id = ((sc_pkcs15_cert_info_t *)(certs[i]->data))->id;
- if (sc_pkcs15_find_prkey_by_id(p15card, &cert_id, &tmp_obj))
- /* skip the public key (certificate) if no
- * corresponding private key is present */
- continue;
- 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;
-}
-
-char *
-sc_get_key_label(Key *key)
-{
- int r;
- const struct sc_priv_data *priv;
- struct sc_pkcs15_object *key_obj;
-
- priv = (const struct sc_priv_data *) RSA_get_app_data(key->rsa);
- if (priv == NULL || p15card == NULL) {
- logit("SmartCard key not loaded");
- /* internal error => return default label */
- return xstrdup("smartcard key");
- }
- r = sc_pkcs15_find_prkey_by_id(p15card, &priv->cert_id, &key_obj);
- if (r) {
- logit("Unable to find private key from SmartCard: %s",
- sc_strerror(r));
- return xstrdup("smartcard key");
- }
- if (key_obj == NULL || key_obj->label == NULL)
- /* the optional PKCS#15 label does not exists
- * => return the default label */
- return xstrdup("smartcard key");
- return xstrdup(key_obj->label);
-}
-
-#endif /* SMARTCARD */
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