[svn-upgrade] Integrating new upstream version, strongswan (4.2.8)

1 files changed, 152 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/sha1/sha1_prf.c b/src/libstrongswan/plugins/sha1/sha1_prf.c
new file mode 100644
index 000000000..668801caf
--- /dev/null
+++ b/src/libstrongswan/plugins/sha1/sha1_prf.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * 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.
+ *
+ * $Id$
+ */
+
+#include "sha1_prf.h"
+#include "sha1_hasher.h"
+
+#include <arpa/inet.h>
+
+typedef struct private_sha1_prf_t private_sha1_prf_t;
+typedef struct private_sha1_hasher_t private_sha1_hasher_t;
+
+/**
+ * Private data structure with hasing context.
+ */
+struct private_sha1_hasher_t {
+	/**
+	 * Public interface for this hasher.
+	 */
+	sha1_hasher_t public;
+	
+	/*
+	 * State of the hasher. From sha1_hasher.c, do not change it!
+	 */
+	u_int32_t state[5];
+    u_int32_t count[2];
+    u_int8_t buffer[64];
+};
+
+/**
+ * Private data structure with keyed prf context.
+ */
+struct private_sha1_prf_t {
+
+	/**
+	 * public prf interface
+	 */
+	sha1_prf_t public;
+
+	/**
+	 * internal used hasher
+	 */
+	private_sha1_hasher_t *hasher;
+};
+
+/**
+ * From sha1_hasher.c
+ */
+extern void SHA1Update(private_sha1_hasher_t* this, u_int8_t *data, u_int32_t len);
+
+/**
+ * Implementation of prf_t.get_bytes.
+ */
+static void get_bytes(private_sha1_prf_t *this, chunk_t seed, u_int8_t *bytes)
+{
+	u_int32_t *hash = (u_int32_t*)bytes;
+
+	SHA1Update(this->hasher, seed.ptr, seed.len);
+
+	hash[0] = htonl(this->hasher->state[0]);
+	hash[1] = htonl(this->hasher->state[1]);
+	hash[2] = htonl(this->hasher->state[2]);
+	hash[3] = htonl(this->hasher->state[3]);
+	hash[4] = htonl(this->hasher->state[4]);
+}
+
+/**
+ * Implementation of prf_t.get_block_size.
+ */
+static size_t get_block_size(private_sha1_prf_t *this)
+{
+	return HASH_SIZE_SHA1;
+}
+
+/**
+ * Implementation of prf_t.allocate_bytes.
+ */
+static void allocate_bytes(private_sha1_prf_t *this, chunk_t seed, chunk_t *chunk)
+{
+	*chunk = chunk_alloc(HASH_SIZE_SHA1);
+	get_bytes(this, seed, chunk->ptr);
+}
+
+/**
+ * Implementation of prf_t.get_key_size.
+ */
+static size_t get_key_size(private_sha1_prf_t *this)
+{
+	return sizeof(this->hasher->state);
+}
+
+/**
+ * Implementation of prf_t.set_key.
+ */
+static void set_key(private_sha1_prf_t *this, chunk_t key)
+{
+	int i, rounds;
+	u_int32_t *iv = (u_int32_t*)key.ptr;
+	
+	this->hasher->public.hasher_interface.reset(&this->hasher->public.hasher_interface);
+	rounds = min(key.len/sizeof(u_int32_t), sizeof(this->hasher->state));
+	for (i = 0; i < rounds; i++)
+	{
+		this->hasher->state[i] ^= htonl(iv[i]);
+	}
+}
+
+/**
+ * Implementation of prf_t.destroy.
+ */
+static void destroy(private_sha1_prf_t *this)
+{
+	this->hasher->public.hasher_interface.destroy(&this->hasher->public.hasher_interface);
+	free(this);
+}
+
+/**
+ * see header
+ */
+sha1_prf_t *sha1_prf_create(pseudo_random_function_t algo)
+{
+	private_sha1_prf_t *this;
+	if (algo != PRF_KEYED_SHA1)
+	{
+		return NULL;
+	}
+	this = malloc_thing(private_sha1_prf_t);
+	this->public.prf_interface.get_bytes = (void (*) (prf_t *,chunk_t,u_int8_t*))get_bytes;
+	this->public.prf_interface.allocate_bytes = (void (*) (prf_t*,chunk_t,chunk_t*))allocate_bytes;
+	this->public.prf_interface.get_block_size = (size_t (*) (prf_t*))get_block_size;
+	this->public.prf_interface.get_key_size = (size_t (*) (prf_t*))get_key_size;
+	this->public.prf_interface.set_key = (void (*) (prf_t *,chunk_t))set_key;
+	this->public.prf_interface.destroy = (void (*) (prf_t *))destroy;
+	
+	this->hasher = (private_sha1_hasher_t*)sha1_hasher_create(HASH_SHA1);
+	
+	return &this->public;
+}
+