Add a pclmulqdq ghash implementation

4 files changed, 219 insertions, 0 deletions

diff --git a/src/crypto/mac/ghash/pclmulqdq/CMakeLists.txt b/src/crypto/mac/ghash/pclmulqdq/CMakeLists.txt
new file mode 100644
index 0000000..a11ad02
--- /dev/null
+++ b/src/crypto/mac/ghash/pclmulqdq/CMakeLists.txt
@@ -0,0 +1,7 @@
+if(ARCH_X86 OR ARCH_X86_64)
+  fastd_mac_impl(ghash pclmulqdq
+    ghash_pclmulqdq.c
+    ghash_pclmulqdq_impl.c
+    )
+  fastd_mac_impl_compile_flags(ghash pclmulqdq ghash_pclmulqdq_impl.c "-mssse3 -mpclmul")
+endif(ARCH_X86 OR ARCH_X86_64)
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,
+};
diff --git a/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq.h b/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq.h
new file mode 100644
index 0000000..f2bc916
--- /dev/null
+++ b/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq.h
@@ -0,0 +1,45 @@
+/*
+  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 "../../../../crypto.h"
+
+
+typedef union _v2di {
+	uint64_t v __attribute__((vector_size(16)));
+	char v16 __attribute__((vector_size(16)));
+	long long int vll __attribute__((vector_size(16)));
+	uint64_t e[2];
+	fastd_block128_t block;
+} v2di;
+
+
+struct fastd_mac_state {
+	v2di H;
+};
+
+
+fastd_mac_state_t* fastd_ghash_pclmulqdq_init_state(fastd_context_t *ctx, const fastd_mac_context_t *mctx, const uint8_t *key);
+bool fastd_ghash_pclmulqdq_hash(fastd_context_t *ctx, const fastd_mac_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t n_blocks);
diff --git a/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq_impl.c b/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq_impl.c
new file mode 100644
index 0000000..e797d3c
--- /dev/null
+++ b/src/crypto/mac/ghash/pclmulqdq/ghash_pclmulqdq_impl.c
@@ -0,0 +1,106 @@
+/*
+  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"
+
+
+static inline v2di shl(v2di v, int a) {
+	v2di tmph, tmpl;
+	tmph.v = v.v << ((v2di){{a, a}}).v;
+	tmpl.v = v.v >> ((v2di){{64-a, 64-a}}).v;
+
+	return (v2di){{tmph.e[0], tmph.e[1]|tmpl.e[0]}};
+}
+
+static inline v2di shr(v2di v, int a) {
+	v2di tmph, tmpl;
+	tmph.v = v.v >> ((v2di){{a, a}}).v;
+	tmpl.v = v.v << ((v2di){{64-a, 64-a}}).v;
+
+	return (v2di){{tmph.e[0]|tmpl.e[1], tmph.e[1]}};
+}
+
+static inline v2di byteswap(v2di v) {
+	const v2di shuffle = { .v16 = {15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}};
+	v.v16 = __builtin_ia32_pshufb128(v.v16, shuffle.v16);
+	return v;
+}
+
+fastd_mac_state_t* fastd_ghash_pclmulqdq_init_state(fastd_context_t *ctx UNUSED, const fastd_mac_context_t *mctx UNUSED, const uint8_t *key) {
+	fastd_mac_state_t *state = malloc(sizeof(fastd_mac_state_t));
+
+	memcpy(&state->H, key, sizeof(v2di));
+	state->H = byteswap(state->H);
+
+	return state;
+}
+
+static inline v2di gmul(v2di v, v2di h) {
+	/* multiply */
+	v2di tmp00, tmp10, tmp01, tmp11;
+	tmp00.vll = __builtin_ia32_pclmulqdq128(v.vll, h.vll, 0x00);
+	tmp01.vll = __builtin_ia32_pclmulqdq128(v.vll, h.vll, 0x01);
+	tmp10.vll = __builtin_ia32_pclmulqdq128(v.vll, h.vll, 0x10);
+	tmp11.vll = __builtin_ia32_pclmulqdq128(v.vll, h.vll, 0x11);
+
+	v2di pl = {{tmp11.e[0] ^ tmp01.e[1] ^ tmp10.e[1], tmp11.e[1]}};
+	v2di ph = {{tmp00.e[0], tmp00.e[1] ^ tmp01.e[0] ^ tmp10.e[0]}};
+
+	pl = shl(pl, 1);
+	pl.e[0] |= ph.e[1] >> 63;
+
+	ph = shl(ph, 1);
+
+	/* reduce */
+	uint64_t b = ph.e[0] << 62;
+	uint64_t c = ph.e[0] << 57;
+
+	v2di d = {{ph.e[0], ph.e[1] ^ b ^ c}};
+
+	v2di e = shr(d, 1);
+	v2di f = shr(d, 2);
+	v2di g = shr(d, 7);
+
+	pl.v ^= d.v ^ e.v ^ f.v ^ g.v;
+
+	return pl;
+}
+
+
+bool fastd_ghash_pclmulqdq_hash(fastd_context_t *ctx UNUSED, const fastd_mac_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t n_blocks) {
+	const v2di *inv = (const v2di*)in;
+	v2di v = {{0, 0}};
+
+	size_t i;
+	for (i = 0; i < n_blocks; i++) {
+		v.v ^= byteswap(inv[i]).v;
+		v = gmul(v, state->H);
+	}
+
+	*out = byteswap(v).block;
+
+	return true;
+}