Adding upstream version 3.7.9.upstream/3.7.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 206 insertions, 0 deletions

diff --git a/lib/accelerated/x86/aes-gcm-x86-aesni.c b/lib/accelerated/x86/aes-gcm-x86-aesni.c
new file mode 100644
index 0000000..3be63dd
--- /dev/null
+++ b/lib/accelerated/x86/aes-gcm-x86-aesni.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2011-2012 Free Software Foundation, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * The GnuTLS is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ *
+ */
+
+/*
+ * The following code is an implementation of the AES-128-GCM cipher
+ * using AESNI (without PCLMUL)
+ */
+
+#include "errors.h"
+#include "gnutls_int.h"
+
+#ifdef HAVE_LIBNETTLE
+
+#include <gnutls/crypto.h>
+#include "errors.h"
+#include <aes-x86.h>
+#include <x86-common.h>
+#include <byteswap.h>
+#include <nettle/gcm.h>
+
+/* GCM mode 
+ * It is used when the CPU doesn't include the PCLMUL instructions.
+ */
+struct gcm_x86_aes_ctx {
+	struct GCM_CTX(AES_KEY) inner;
+	size_t rekey_counter;
+};
+
+static void x86_aes_encrypt(const void *_ctx,
+				size_t length, uint8_t * dst,
+				const uint8_t * src)
+{
+	AES_KEY *ctx = (void*)_ctx;
+
+	aesni_ecb_encrypt(src, dst, length, ctx, 1);
+}
+
+static void x86_aes128_set_encrypt_key(void *_ctx,
+					const uint8_t * key)
+{
+	AES_KEY *ctx = _ctx;
+
+	aesni_set_encrypt_key(key, 16*8, ctx);
+}
+
+static void x86_aes192_set_encrypt_key(void *_ctx,
+					const uint8_t * key)
+{
+	AES_KEY *ctx = _ctx;
+
+	aesni_set_encrypt_key(key, 24*8, ctx);
+}
+
+static void x86_aes256_set_encrypt_key(void *_ctx,
+					const uint8_t * key)
+{
+	AES_KEY *ctx = _ctx;
+
+	aesni_set_encrypt_key(key, 32*8, ctx);
+}
+
+static int
+aes_gcm_cipher_init(gnutls_cipher_algorithm_t algorithm, void **_ctx,
+		    int enc)
+{
+	/* we use key size to distinguish */
+	if (algorithm != GNUTLS_CIPHER_AES_128_GCM &&
+	    algorithm != GNUTLS_CIPHER_AES_192_GCM &&
+	    algorithm != GNUTLS_CIPHER_AES_256_GCM)
+		return GNUTLS_E_INVALID_REQUEST;
+
+	*_ctx = gnutls_calloc(1, sizeof(struct gcm_x86_aes_ctx));
+	if (*_ctx == NULL) {
+		gnutls_assert();
+		return GNUTLS_E_MEMORY_ERROR;
+	}
+
+	return 0;
+}
+
+static int
+aes_gcm_cipher_setkey(void *_ctx, const void *key, size_t length)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+
+	if (length == 16) {
+		GCM_SET_KEY(&ctx->inner, x86_aes128_set_encrypt_key, x86_aes_encrypt,
+			    key);
+	} else if (length == 24) {
+		GCM_SET_KEY(&ctx->inner, x86_aes192_set_encrypt_key, x86_aes_encrypt,
+			    key);
+	} else if (length == 32) {
+		GCM_SET_KEY(&ctx->inner, x86_aes256_set_encrypt_key, x86_aes_encrypt,
+			    key);
+	} else
+		return GNUTLS_E_INVALID_REQUEST;
+
+	ctx->rekey_counter = 0;
+	return 0;
+}
+
+static int aes_gcm_setiv(void *_ctx, const void *iv, size_t iv_size)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+
+	if (iv_size != GCM_BLOCK_SIZE - 4)
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
+	GCM_SET_IV(&ctx->inner, iv_size, iv);
+
+	ctx->rekey_counter = 0;
+	return 0;
+}
+
+static int
+aes_gcm_encrypt(void *_ctx, const void *src, size_t src_size,
+		void *dst, size_t length)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+	int ret;
+
+	if (unlikely(length < src_size))
+		return gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
+
+	ret = record_aes_gcm_encrypt_size(&ctx->rekey_counter, src_size);
+	if (ret < 0) {
+		return gnutls_assert_val(ret);
+	}
+
+	GCM_ENCRYPT(&ctx->inner, x86_aes_encrypt, src_size, dst, src);
+
+	return 0;
+}
+
+static int
+aes_gcm_decrypt(void *_ctx, const void *src, size_t src_size,
+		void *dst, size_t dst_size)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+
+	if (unlikely(dst_size < src_size))
+		return gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
+
+	GCM_DECRYPT(&ctx->inner, x86_aes_encrypt, src_size, dst, src);
+	return 0;
+}
+
+static int aes_gcm_auth(void *_ctx, const void *src, size_t src_size)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+
+	GCM_UPDATE(&ctx->inner, src_size, src);
+
+	return 0;
+}
+
+static void aes_gcm_tag(void *_ctx, void *tag, size_t tagsize)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+
+	GCM_DIGEST(&ctx->inner, x86_aes_encrypt, tagsize, tag);
+}
+
+static void aes_gcm_deinit(void *_ctx)
+{
+	struct gcm_x86_aes_ctx *ctx = _ctx;
+
+	zeroize_temp_key(ctx, sizeof(*ctx));
+	gnutls_free(ctx);
+}
+
+#include "aes-gcm-aead.h"
+
+const gnutls_crypto_cipher_st _gnutls_aes_gcm_x86_aesni = {
+	.init = aes_gcm_cipher_init,
+	.setkey = aes_gcm_cipher_setkey,
+	.setiv = aes_gcm_setiv,
+	.aead_encrypt = aes_gcm_aead_encrypt,
+	.aead_decrypt = aes_gcm_aead_decrypt,
+	.encrypt = aes_gcm_encrypt,
+	.decrypt = aes_gcm_decrypt,
+	.deinit = aes_gcm_deinit,
+	.tag = aes_gcm_tag,
+	.auth = aes_gcm_auth,
+};
+
+#endif