1 files changed, 147 insertions, 0 deletions
diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c
new file mode 100644
index 000000000..71fa4f112
--- /dev/null
+++ b/arch/arm64/crypto/sha1-ce-glue.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
+ *
+ * Copyright (C) 2014 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
+ */
+
+#include <asm/neon.h>
+#include <asm/simd.h>
+#include <asm/unaligned.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/simd.h>
+#include <crypto/sha1.h>
+#include <crypto/sha1_base.h>
+#include <linux/cpufeature.h>
+#include <linux/crypto.h>
+#include <linux/module.h>
+
+MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
+MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS_CRYPTO("sha1");
+
+struct sha1_ce_state {
+	struct sha1_state	sst;
+	u32			finalize;
+};
+
+extern const u32 sha1_ce_offsetof_count;
+extern const u32 sha1_ce_offsetof_finalize;
+
+asmlinkage int sha1_ce_transform(struct sha1_ce_state *sst, u8 const *src,
+				 int blocks);
+
+static void __sha1_ce_transform(struct sha1_state *sst, u8 const *src,
+				int blocks)
+{
+	while (blocks) {
+		int rem;
+
+		kernel_neon_begin();
+		rem = sha1_ce_transform(container_of(sst, struct sha1_ce_state,
+						     sst), src, blocks);
+		kernel_neon_end();
+		src += (blocks - rem) * SHA1_BLOCK_SIZE;
+		blocks = rem;
+	}
+}
+
+const u32 sha1_ce_offsetof_count = offsetof(struct sha1_ce_state, sst.count);
+const u32 sha1_ce_offsetof_finalize = offsetof(struct sha1_ce_state, finalize);
+
+static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
+			  unsigned int len)
+{
+	struct sha1_ce_state *sctx = shash_desc_ctx(desc);
+
+	if (!crypto_simd_usable())
+		return crypto_sha1_update(desc, data, len);
+
+	sctx->finalize = 0;
+	sha1_base_do_update(desc, data, len, __sha1_ce_transform);
+
+	return 0;
+}
+
+static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
+			 unsigned int len, u8 *out)
+{
+	struct sha1_ce_state *sctx = shash_desc_ctx(desc);
+	bool finalize = !sctx->sst.count && !(len % SHA1_BLOCK_SIZE) && len;
+
+	if (!crypto_simd_usable())
+		return crypto_sha1_finup(desc, data, len, out);
+
+	/*
+	 * Allow the asm code to perform the finalization if there is no
+	 * partial data and the input is a round multiple of the block size.
+	 */
+	sctx->finalize = finalize;
+
+	sha1_base_do_update(desc, data, len, __sha1_ce_transform);
+	if (!finalize)
+		sha1_base_do_finalize(desc, __sha1_ce_transform);
+	return sha1_base_finish(desc, out);
+}
+
+static int sha1_ce_final(struct shash_desc *desc, u8 *out)
+{
+	struct sha1_ce_state *sctx = shash_desc_ctx(desc);
+
+	if (!crypto_simd_usable())
+		return crypto_sha1_finup(desc, NULL, 0, out);
+
+	sctx->finalize = 0;
+	sha1_base_do_finalize(desc, __sha1_ce_transform);
+	return sha1_base_finish(desc, out);
+}
+
+static int sha1_ce_export(struct shash_desc *desc, void *out)
+{
+	struct sha1_ce_state *sctx = shash_desc_ctx(desc);
+
+	memcpy(out, &sctx->sst, sizeof(struct sha1_state));
+	return 0;
+}
+
+static int sha1_ce_import(struct shash_desc *desc, const void *in)
+{
+	struct sha1_ce_state *sctx = shash_desc_ctx(desc);
+
+	memcpy(&sctx->sst, in, sizeof(struct sha1_state));
+	sctx->finalize = 0;
+	return 0;
+}
+
+static struct shash_alg alg = {
+	.init			= sha1_base_init,
+	.update			= sha1_ce_update,
+	.final			= sha1_ce_final,
+	.finup			= sha1_ce_finup,
+	.import			= sha1_ce_import,
+	.export			= sha1_ce_export,
+	.descsize		= sizeof(struct sha1_ce_state),
+	.statesize		= sizeof(struct sha1_state),
+	.digestsize		= SHA1_DIGEST_SIZE,
+	.base			= {
+		.cra_name		= "sha1",
+		.cra_driver_name	= "sha1-ce",
+		.cra_priority		= 200,
+		.cra_blocksize		= SHA1_BLOCK_SIZE,
+		.cra_module		= THIS_MODULE,
+	}
+};
+
+static int __init sha1_ce_mod_init(void)
+{
+	return crypto_register_shash(&alg);
+}
+
+static void __exit sha1_ce_mod_fini(void)
+{
+	crypto_unregister_shash(&alg);
+}
+
+module_cpu_feature_match(SHA1, sha1_ce_mod_init);
+module_exit(sha1_ce_mod_fini);