Created framework for BLISS post-quantum signature algorithm

src/libstrongswan/plugins/bliss/bliss_private_key.c

@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2014 Andreas Steffen
+ * HSR 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 "bliss_private_key.h"
+
+typedef struct private_bliss_private_key_t private_bliss_private_key_t;
+
+/**
+ * Private data of a bliss_private_key_t object.
+ */
+struct private_bliss_private_key_t {
+	/**
+	 * Public interface for this signer.
+	 */
+	bliss_private_key_t public;
+
+
+	/**
+	 * BLISS type
+	 */
+	u_int key_size;
+
+	/**
+	 * reference count
+	 */
+	refcount_t ref;
+};
+
+METHOD(private_key_t, get_type, key_type_t,
+	private_bliss_private_key_t *this)
+{
+	return KEY_BLISS;
+}
+
+METHOD(private_key_t, sign, bool,
+	private_bliss_private_key_t *this, signature_scheme_t scheme,
+	chunk_t data, chunk_t *signature)
+{
+	switch (scheme)
+	{
+		case SIGN_BLISS_I_SHA256:
+			return FALSE;
+		case SIGN_BLISS_IV_SHA384:
+			return FALSE;
+		default:
+			DBG1(DBG_LIB, "signature scheme %N not supported with BLISS",
+				 signature_scheme_names, scheme);
+			return FALSE;
+	}
+}
+
+METHOD(private_key_t, decrypt, bool,
+	private_bliss_private_key_t *this, encryption_scheme_t scheme,
+	chunk_t crypto, chunk_t *plain)
+{
+	DBG1(DBG_LIB, "encryption scheme %N not supported",
+				   encryption_scheme_names, scheme);
+	return FALSE;
+}
+
+METHOD(private_key_t, get_keysize, int,
+	private_bliss_private_key_t *this)
+{
+	return this->key_size;
+}
+
+METHOD(private_key_t, get_public_key, public_key_t*,
+	private_bliss_private_key_t *this)
+{
+	public_key_t *public = NULL;
+
+	return public;
+}
+
+METHOD(private_key_t, get_encoding, bool,
+	private_bliss_private_key_t *this, cred_encoding_type_t type,
+	chunk_t *encoding)
+{
+	bool success = TRUE;
+
+	*encoding = chunk_empty;
+
+	return success;
+}
+
+METHOD(private_key_t, get_fingerprint, bool,
+	private_bliss_private_key_t *this, cred_encoding_type_t type, chunk_t *fp)
+{
+	bool success = FALSE;
+
+	return success;
+}
+
+METHOD(private_key_t, get_ref, private_key_t*,
+	private_bliss_private_key_t *this)
+{
+	ref_get(&this->ref);
+	return &this->public.key;
+}
+
+METHOD(private_key_t, destroy, void,
+	private_bliss_private_key_t *this)
+{
+	if (ref_put(&this->ref))
+	{
+		free(this);
+	}
+}
+
+/**
+ * Internal generic constructor
+ */
+static private_bliss_private_key_t *bliss_private_key_create_empty(void)
+{
+	private_bliss_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,
+	);
+	return this;
+}
+
+/**
+ * See header.
+ */
+bliss_private_key_t *bliss_private_key_gen(key_type_t type, va_list args)
+{
+	private_bliss_private_key_t *this;
+	u_int key_size = 1;
+
+	while (TRUE)
+	{
+		switch (va_arg(args, builder_part_t))
+		{
+			case BUILD_KEY_SIZE:
+				key_size = va_arg(args, u_int);
+				continue;
+			case BUILD_END:
+				break;
+			default:
+				return NULL;
+		}
+		break;
+	}
+
+	/* Only BLISS-I and BLISS-IV are supported */
+	if (key_size != 1 && key_size != 4)
+	{
+		return NULL;
+	}
+
+	this = bliss_private_key_create_empty();
+	this->key_size = key_size;
+
+	return &this->public;
+}
+
+/**
+ * See header.
+ */
+bliss_private_key_t *bliss_private_key_load(key_type_t type, va_list args)
+{
+	private_bliss_private_key_t *this;
+
+	while (TRUE)
+	{
+		switch (va_arg(args, builder_part_t))
+		{
+			default:
+				return NULL;
+		}
+		break;
+	}
+
+	this = bliss_private_key_create_empty();
+
+	return &this->public;
+}
+