Add TKM private key implementation
authorReto Buerki <reet@codelabs.ch>
Tue, 16 Oct 2012 14:27:46 +0000 (16:27 +0200)
committerTobias Brunner <tobias@strongswan.org>
Tue, 19 Mar 2013 14:23:49 +0000 (15:23 +0100)
The key currently imitates the private key of alice@strongswan.org by
returning it's fingerprint in the get_fingerprint function.

This associates the private key with alice's X.509 cert and charon will
use it to create a signature over the local AUTH octets of the test
connection.

The private key serves as a proxy to the TKM ike_isa_sign operation and
extracts the required information from the auth octets chunk passed on
by the keymat.

src/charon-tkm/src/tkm/tkm_private_key.c [new file with mode: 0644]
src/charon-tkm/src/tkm/tkm_private_key.h [new file with mode: 0644]

diff --git a/src/charon-tkm/src/tkm/tkm_private_key.c b/src/charon-tkm/src/tkm/tkm_private_key.c
new file mode 100644 (file)
index 0000000..d728f8d
--- /dev/null
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2012 Reto Buerki
+ * Copyright (C) 2012 Adrian-Ken Rueegsegger
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+#include <utils/debug.h>
+#include <tkm/constants.h>
+#include <tkm/client.h>
+
+#include "tkm_utils.h"
+#include "tkm_types.h"
+#include "tkm_private_key.h"
+
+typedef struct private_tkm_private_key_t private_tkm_private_key_t;
+
+/**
+ * Private data of a tkm_private_key_t object.
+ */
+struct private_tkm_private_key_t {
+
+       /**
+        * Public interface for this signer.
+        */
+       tkm_private_key_t public;
+
+       /**
+        * Key fingerprint.
+        */
+       chunk_t fingerprint;
+
+       /**
+        * Reference count.
+        */
+       refcount_t ref;
+
+};
+
+METHOD(private_key_t, get_type, key_type_t,
+       private_tkm_private_key_t *this)
+{
+       return KEY_RSA;
+}
+
+METHOD(private_key_t, sign, bool,
+       private_tkm_private_key_t *this, signature_scheme_t scheme,
+       chunk_t data, chunk_t *signature)
+{
+       signature_type sig;
+       init_message_type msg;
+
+       if (data.ptr == NULL)
+       {
+               DBG1(DBG_LIB, "unable to get signature information");
+               return FALSE;
+       }
+       sign_info_t sign = *(sign_info_t *)(data.ptr);
+
+       chunk_to_sequence(&sign.init_message, &msg, sizeof(init_message_type));
+       const isa_id_type isa_id = sign.isa_id;
+       chunk_free(&sign.init_message);
+
+       if (ike_isa_sign(isa_id, 1, msg, &sig) != TKM_OK)
+       {
+               DBG1(DBG_LIB, "signature operation failed");
+               return FALSE;
+       }
+
+       sequence_to_chunk(sig.data, sig.size, signature);
+       return TRUE;
+}
+
+METHOD(private_key_t, decrypt, bool,
+       private_tkm_private_key_t *this, encryption_scheme_t scheme,
+       chunk_t crypto, chunk_t *plain)
+{
+       return FALSE;
+}
+
+METHOD(private_key_t, get_keysize, int,
+       private_tkm_private_key_t *this)
+{
+       return 0;
+}
+
+METHOD(private_key_t, get_public_key, public_key_t*,
+       private_tkm_private_key_t *this)
+{
+       return NULL;
+}
+
+METHOD(private_key_t, get_encoding, bool,
+       private_tkm_private_key_t *this, cred_encoding_type_t type,
+       chunk_t *encoding)
+{
+       return FALSE;
+}
+
+METHOD(private_key_t, get_fingerprint, bool,
+       private_tkm_private_key_t *this, cred_encoding_type_t type, chunk_t *fp)
+{
+       *fp = this->fingerprint;
+       return TRUE;
+}
+
+METHOD(private_key_t, get_ref, private_key_t*,
+       private_tkm_private_key_t *this)
+{
+       ref_get(&this->ref);
+       return &this->public.key;
+}
+
+METHOD(private_key_t, destroy, void,
+       private_tkm_private_key_t *this)
+{
+       if (ref_put(&this->ref))
+       {
+               chunk_free(&this->fingerprint);
+               free(this);
+       }
+}
+
+/**
+ * See header.
+ */
+tkm_private_key_t *tkm_private_key_init(void)
+{
+       private_tkm_private_key_t *this;
+
+       INIT(this,
+               .public = {
+                       .key = {
+                               .get_type = _get_type,
+                               .sign = _sign,
+                               .decrypt = _decrypt,
+                               .get_keysize = _get_keysize,
+                               .get_public_key = _get_public_key,
+                               .equals = private_key_equals,
+                               .belongs_to = private_key_belongs_to,
+                               .get_fingerprint = _get_fingerprint,
+                               .has_fingerprint = private_key_has_fingerprint,
+                               .get_encoding = _get_encoding,
+                               .get_ref = _get_ref,
+                               .destroy = _destroy,
+                       },
+               },
+               .ref = 1,
+       );
+
+       /* fingerprint of alice@strongswan.org keypair */
+       const char fake_fp[] = "05da04208c02f428470acf6c772d066613da863c";
+       this->fingerprint = chunk_create((u_char *)fake_fp, strlen(fake_fp));
+       this->fingerprint = chunk_from_hex(this->fingerprint, NULL);
+
+       return &this->public;
+}
diff --git a/src/charon-tkm/src/tkm/tkm_private_key.h b/src/charon-tkm/src/tkm/tkm_private_key.h
new file mode 100644 (file)
index 0000000..aa472a1
--- /dev/null
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2012 Reto Buerki
+ * Copyright (C) 2012 Adrian-Ken Rueegsegger
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+#ifndef TKM_PRIVATE_KEY_H_
+#define TKM_PRIVATE_KEY_H_
+
+#include <credentials/keys/private_key.h>
+
+typedef struct tkm_private_key_t tkm_private_key_t;
+
+/**
+ * TKM private_key_t implementation.
+ */
+struct tkm_private_key_t {
+
+       /**
+        * Implements private_key_t interface
+        */
+       private_key_t key;
+};
+
+/**
+ * Initialize TKM private key.
+ */
+tkm_private_key_t *tkm_private_key_init(void);
+
+#endif /** TKM_PRIVATE_KEY_H_ */