Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 240 insertions, 0 deletions

diff --git a/arch/x86/crypto/serpent_sse2_glue.c b/arch/x86/crypto/serpent_sse2_glue.c
new file mode 100644
index 000000000..3dafe1375
--- /dev/null
+++ b/arch/x86/crypto/serpent_sse2_glue.c
@@ -0,0 +1,240 @@
+/*
+ * Glue Code for SSE2 assembler versions of Serpent Cipher
+ *
+ * Copyright (c) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
+ *
+ * Glue code based on aesni-intel_glue.c by:
+ *  Copyright (C) 2008, Intel Corp.
+ *    Author: Huang Ying <ying.huang@intel.com>
+ *
+ * CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
+ *   Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ * CTR part based on code (crypto/ctr.c) by:
+ *   (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ * USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/b128ops.h>
+#include <crypto/internal/simd.h>
+#include <crypto/serpent.h>
+#include <asm/crypto/serpent-sse2.h>
+#include <asm/crypto/glue_helper.h>
+
+static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
+				   const u8 *key, unsigned int keylen)
+{
+	return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
+}
+
+static void serpent_decrypt_cbc_xway(void *ctx, u128 *dst, const u128 *src)
+{
+	u128 ivs[SERPENT_PARALLEL_BLOCKS - 1];
+	unsigned int j;
+
+	for (j = 0; j < SERPENT_PARALLEL_BLOCKS - 1; j++)
+		ivs[j] = src[j];
+
+	serpent_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
+
+	for (j = 0; j < SERPENT_PARALLEL_BLOCKS - 1; j++)
+		u128_xor(dst + (j + 1), dst + (j + 1), ivs + j);
+}
+
+static void serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
+{
+	be128 ctrblk;
+
+	le128_to_be128(&ctrblk, iv);
+	le128_inc(iv);
+
+	__serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
+	u128_xor(dst, src, (u128 *)&ctrblk);
+}
+
+static void serpent_crypt_ctr_xway(void *ctx, u128 *dst, const u128 *src,
+				   le128 *iv)
+{
+	be128 ctrblks[SERPENT_PARALLEL_BLOCKS];
+	unsigned int i;
+
+	for (i = 0; i < SERPENT_PARALLEL_BLOCKS; i++) {
+		if (dst != src)
+			dst[i] = src[i];
+
+		le128_to_be128(&ctrblks[i], iv);
+		le128_inc(iv);
+	}
+
+	serpent_enc_blk_xway_xor(ctx, (u8 *)dst, (u8 *)ctrblks);
+}
+
+static const struct common_glue_ctx serpent_enc = {
+	.num_funcs = 2,
+	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = SERPENT_PARALLEL_BLOCKS,
+		.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_enc_blk_xway) }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
+	} }
+};
+
+static const struct common_glue_ctx serpent_ctr = {
+	.num_funcs = 2,
+	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = SERPENT_PARALLEL_BLOCKS,
+		.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_crypt_ctr_xway) }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_crypt_ctr) }
+	} }
+};
+
+static const struct common_glue_ctx serpent_dec = {
+	.num_funcs = 2,
+	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = SERPENT_PARALLEL_BLOCKS,
+		.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_dec_blk_xway) }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
+	} }
+};
+
+static const struct common_glue_ctx serpent_dec_cbc = {
+	.num_funcs = 2,
+	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = SERPENT_PARALLEL_BLOCKS,
+		.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_decrypt_cbc_xway) }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
+	} }
+};
+
+static int ecb_encrypt(struct skcipher_request *req)
+{
+	return glue_ecb_req_128bit(&serpent_enc, req);
+}
+
+static int ecb_decrypt(struct skcipher_request *req)
+{
+	return glue_ecb_req_128bit(&serpent_dec, req);
+}
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+	return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__serpent_encrypt),
+					   req);
+}
+
+static int cbc_decrypt(struct skcipher_request *req)
+{
+	return glue_cbc_decrypt_req_128bit(&serpent_dec_cbc, req);
+}
+
+static int ctr_crypt(struct skcipher_request *req)
+{
+	return glue_ctr_req_128bit(&serpent_ctr, req);
+}
+
+static struct skcipher_alg serpent_algs[] = {
+	{
+		.base.cra_name		= "__ecb(serpent)",
+		.base.cra_driver_name	= "__ecb-serpent-sse2",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= SERPENT_MIN_KEY_SIZE,
+		.max_keysize		= SERPENT_MAX_KEY_SIZE,
+		.setkey			= serpent_setkey_skcipher,
+		.encrypt		= ecb_encrypt,
+		.decrypt		= ecb_decrypt,
+	}, {
+		.base.cra_name		= "__cbc(serpent)",
+		.base.cra_driver_name	= "__cbc-serpent-sse2",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= SERPENT_MIN_KEY_SIZE,
+		.max_keysize		= SERPENT_MAX_KEY_SIZE,
+		.ivsize			= SERPENT_BLOCK_SIZE,
+		.setkey			= serpent_setkey_skcipher,
+		.encrypt		= cbc_encrypt,
+		.decrypt		= cbc_decrypt,
+	}, {
+		.base.cra_name		= "__ctr(serpent)",
+		.base.cra_driver_name	= "__ctr-serpent-sse2",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= 1,
+		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= SERPENT_MIN_KEY_SIZE,
+		.max_keysize		= SERPENT_MAX_KEY_SIZE,
+		.ivsize			= SERPENT_BLOCK_SIZE,
+		.chunksize		= SERPENT_BLOCK_SIZE,
+		.setkey			= serpent_setkey_skcipher,
+		.encrypt		= ctr_crypt,
+		.decrypt		= ctr_crypt,
+	},
+};
+
+static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
+
+static int __init serpent_sse2_init(void)
+{
+	if (!boot_cpu_has(X86_FEATURE_XMM2)) {
+		printk(KERN_INFO "SSE2 instructions are not detected.\n");
+		return -ENODEV;
+	}
+
+	return simd_register_skciphers_compat(serpent_algs,
+					      ARRAY_SIZE(serpent_algs),
+					      serpent_simd_algs);
+}
+
+static void __exit serpent_sse2_exit(void)
+{
+	simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
+				  serpent_simd_algs);
+}
+
+module_init(serpent_sse2_init);
+module_exit(serpent_sse2_exit);
+
+MODULE_DESCRIPTION("Serpent Cipher Algorithm, SSE2 optimized");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CRYPTO("serpent");