Imported Upstream version 5.0.1

1 files changed, 191 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/openssl/openssl_hmac.c b/src/libstrongswan/plugins/openssl/openssl_hmac.c
new file mode 100644
index 000000000..5d05425d3
--- /dev/null
+++ b/src/libstrongswan/plugins/openssl/openssl_hmac.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * 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.
+ */
+
+/*
+ * Copyright (C) 2012 Aleksandr Grinberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+
+#include "openssl_hmac.h"
+
+#include <crypto/mac.h>
+#include <crypto/prfs/mac_prf.h>
+#include <crypto/signers/mac_signer.h>
+
+typedef struct private_mac_t private_mac_t;
+
+/**
+ * Private data of a mac_t object.
+ */
+struct private_mac_t {
+
+	/**
+	 * Public interface
+	 */
+	mac_t public;
+
+	/**
+	 * Hasher to use
+	 */
+	const EVP_MD *hasher;
+
+	/**
+	 * Current HMAC context
+	 */
+	HMAC_CTX hmac;
+};
+
+METHOD(mac_t, set_key, bool,
+	private_mac_t *this, chunk_t key)
+{
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L
+	return HMAC_Init_ex(&this->hmac, key.ptr, key.len, this->hasher, NULL);
+#else /* OPENSSL_VERSION_NUMBER < 1.0 */
+	HMAC_Init_ex(&this->hmac, key.ptr, key.len, this->hasher, NULL);
+	return TRUE;
+#endif
+}
+
+METHOD(mac_t, get_mac, bool,
+	private_mac_t *this, chunk_t data, u_int8_t *out)
+{
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L
+	if (!HMAC_Update(&this->hmac, data.ptr, data.len))
+	{
+		return FALSE;
+	}
+	if (out == NULL)
+	{
+		return TRUE;
+	}
+	if (!HMAC_Final(&this->hmac, out, NULL))
+	{
+		return FALSE;
+	}
+#else /* OPENSSL_VERSION_NUMBER < 1.0 */
+	HMAC_Update(&this->hmac, data.ptr, data.len);
+	if (out == NULL)
+	{
+		return TRUE;
+	}
+	HMAC_Final(&this->hmac, out, NULL);
+#endif
+	return set_key(this, chunk_empty);
+}
+
+METHOD(mac_t, get_mac_size, size_t,
+	private_mac_t *this)
+{
+	return EVP_MD_size(this->hasher);
+}
+
+METHOD(mac_t, destroy, void,
+	private_mac_t *this)
+{
+	HMAC_CTX_cleanup(&this->hmac);
+	free(this);
+}
+
+/*
+ * Create an OpenSSL-backed implementation of the mac_t interface
+ */
+static mac_t *hmac_create(hash_algorithm_t algo)
+{
+	private_mac_t *this;
+	char *name;
+
+	name = enum_to_name(hash_algorithm_short_names, algo);
+	if (!name)
+	{
+		return NULL;
+	}
+
+	INIT(this,
+		.public = {
+			.get_mac = _get_mac,
+			.get_mac_size = _get_mac_size,
+			.set_key = _set_key,
+			.destroy = _destroy,
+		},
+		.hasher = EVP_get_digestbyname(name),
+	);
+
+	if (!this->hasher)
+	{
+		free(this);
+		return NULL;
+	}
+
+	HMAC_CTX_init(&this->hmac);
+	if (!set_key(this, chunk_empty))
+	{
+		destroy(this);
+		return NULL;
+	}
+
+	return &this->public;
+}
+
+/*
+ * Described in header
+ */
+prf_t *openssl_hmac_prf_create(pseudo_random_function_t algo)
+{
+	mac_t *hmac;
+
+	hmac = hmac_create(hasher_algorithm_from_prf(algo));
+	if (hmac)
+	{
+		return mac_prf_create(hmac);
+	}
+	return NULL;
+}
+
+/*
+ * Described in header
+ */
+signer_t *openssl_hmac_signer_create(integrity_algorithm_t algo)
+{
+	mac_t *hmac;
+	size_t trunc;
+
+	hmac = hmac_create(hasher_algorithm_from_integrity(algo, &trunc));
+	if (hmac)
+	{
+		return mac_signer_create(hmac, trunc);
+	}
+	return NULL;
+}
+