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-rw-r--r--arch/arm64/crypto/sha1-ce-glue.c147
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 0000000000..71fa4f1122
--- /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);