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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/crypto/serpent_sse2_glue.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/crypto/serpent_sse2_glue.c')
-rw-r--r--arch/x86/crypto/serpent_sse2_glue.c131
1 files changed, 131 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..d78f37e9b
--- /dev/null
+++ b/arch/x86/crypto/serpent_sse2_glue.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ */
+
+#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 "serpent-sse2.h"
+#include "ecb_cbc_helpers.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(const void *ctx, u8 *dst, const u8 *src)
+{
+ u8 buf[SERPENT_PARALLEL_BLOCKS - 1][SERPENT_BLOCK_SIZE];
+ const u8 *s = src;
+
+ if (dst == src)
+ s = memcpy(buf, src, sizeof(buf));
+ serpent_dec_blk_xway(ctx, dst, src);
+ crypto_xor(dst + SERPENT_BLOCK_SIZE, s, sizeof(buf));
+}
+
+static int ecb_encrypt(struct skcipher_request *req)
+{
+ ECB_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
+ ECB_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_enc_blk_xway);
+ ECB_BLOCK(1, __serpent_encrypt);
+ ECB_WALK_END();
+}
+
+static int ecb_decrypt(struct skcipher_request *req)
+{
+ ECB_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
+ ECB_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_dec_blk_xway);
+ ECB_BLOCK(1, __serpent_decrypt);
+ ECB_WALK_END();
+}
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+ CBC_WALK_START(req, SERPENT_BLOCK_SIZE, -1);
+ CBC_ENC_BLOCK(__serpent_encrypt);
+ CBC_WALK_END();
+}
+
+static int cbc_decrypt(struct skcipher_request *req)
+{
+ CBC_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
+ CBC_DEC_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_decrypt_cbc_xway);
+ CBC_DEC_BLOCK(1, __serpent_decrypt);
+ CBC_WALK_END();
+}
+
+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,
+ },
+};
+
+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");