Add a pclmulqdq ghash implementation

1 files changed, 61 insertions, 0 deletions

diff --git a/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq.c b/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq.c
new file mode 100644
index 0000000..11073a5
--- /dev/null
+++ b/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq.c
@@ -0,0 +1,61 @@
+/*
+  Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  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 COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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 "ghash_pclmulqdq.h"
+#include "../../../../cpuid.h"
+
+
+static bool ghash_available(void) {
+	static const uint64_t REQ = CPUID_FXSR|CPUID_SSSE3|CPUID_PCLMULQDQ;
+
+	return ((fastd_cpuid()&REQ) == REQ);
+}
+
+static fastd_mac_context_t* ghash_initialize(fastd_context_t *ctx UNUSED) {
+	return NULL;
+}
+
+static void ghash_free_state(fastd_context_t *ctx UNUSED, fastd_mac_state_t *state) {
+	if (state) {
+		secure_memzero(state, sizeof(*state));
+		free(state);
+	}
+}
+
+static void ghash_free(fastd_context_t *ctx UNUSED, fastd_mac_context_t *mctx UNUSED) {
+}
+
+const fastd_mac_t fastd_mac_ghash_pclmulqdq = {
+	.available = ghash_available,
+
+	.initialize = ghash_initialize,
+	.init_state = fastd_ghash_pclmulqdq_init_state,
+
+	.hash = fastd_ghash_pclmulqdq_hash,
+
+	.free_state = ghash_free_state,
+	.free = ghash_free,
+};