1 files changed, 305 insertions, 0 deletions

diff --git a/arch/arm/crypto/sha512_neon_glue.c b/arch/arm/crypto/sha512_neon_glue.c
new file mode 100644
index 000000000000..0d2758ff5e12
--- /dev/null
+++ b/arch/arm/crypto/sha512_neon_glue.c
@@ -0,0 +1,305 @@
+/*
+ * Glue code for the SHA512 Secure Hash Algorithm assembly implementation
+ * using NEON instructions.
+ *
+ * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+ *
+ * This file is based on sha512_ssse3_glue.c:
+ *   Copyright (C) 2013 Intel Corporation
+ *   Author: Tim Chen <tim.c.chen@linux.intel.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.
+ *
+ */
+
+#include <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/cryptohash.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <crypto/sha.h>
+#include <asm/byteorder.h>
+#include <asm/simd.h>
+#include <asm/neon.h>
+
+
+static const u64 sha512_k[] = {
+        0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
+        0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
+        0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
+        0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
+        0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
+        0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+        0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
+        0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
+        0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
+        0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
+        0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
+        0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+        0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
+        0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
+        0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
+        0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
+        0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
+        0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+        0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
+        0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
+        0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
+        0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
+        0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
+        0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+        0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
+        0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
+        0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
+        0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
+        0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
+        0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+        0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
+        0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
+        0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
+        0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
+        0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
+        0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+        0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
+        0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
+        0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
+        0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
+};
+
+
+asmlinkage void sha512_transform_neon(u64 *digest, const void *data,
+                                      const u64 k[], unsigned int num_blks);
+
+
+static int sha512_neon_init(struct shash_desc *desc)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+
+        sctx->state[0] = SHA512_H0;
+        sctx->state[1] = SHA512_H1;
+        sctx->state[2] = SHA512_H2;
+        sctx->state[3] = SHA512_H3;
+        sctx->state[4] = SHA512_H4;
+        sctx->state[5] = SHA512_H5;
+        sctx->state[6] = SHA512_H6;
+        sctx->state[7] = SHA512_H7;
+        sctx->count[0] = sctx->count[1] = 0;
+
+        return 0;
+}
+
+static int __sha512_neon_update(struct shash_desc *desc, const u8 *data,
+                                unsigned int len, unsigned int partial)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+        unsigned int done = 0;
+
+        sctx->count[0] += len;
+        if (sctx->count[0] < len)
+                sctx->count[1]++;
+
+        if (partial) {
+                done = SHA512_BLOCK_SIZE - partial;
+                memcpy(sctx->buf + partial, data, done);
+                sha512_transform_neon(sctx->state, sctx->buf, sha512_k, 1);
+        }
+
+        if (len - done >= SHA512_BLOCK_SIZE) {
+                const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
+
+                sha512_transform_neon(sctx->state, data + done, sha512_k,
+                                      rounds);
+
+                done += rounds * SHA512_BLOCK_SIZE;
+        }
+
+        memcpy(sctx->buf, data + done, len - done);
+
+        return 0;
+}
+
+static int sha512_neon_update(struct shash_desc *desc, const u8 *data,
+                             unsigned int len)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+        unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
+        int res;
+
+        /* Handle the fast case right here */
+        if (partial + len < SHA512_BLOCK_SIZE) {
+                sctx->count[0] += len;
+                if (sctx->count[0] < len)
+                        sctx->count[1]++;
+                memcpy(sctx->buf + partial, data, len);
+
+                return 0;
+        }
+
+        if (!may_use_simd()) {
+                res = crypto_sha512_update(desc, data, len);
+        } else {
+                kernel_neon_begin();
+                res = __sha512_neon_update(desc, data, len, partial);
+                kernel_neon_end();
+        }
+
+        return res;
+}
+
+
+/* Add padding and return the message digest. */
+static int sha512_neon_final(struct shash_desc *desc, u8 *out)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+        unsigned int i, index, padlen;
+        __be64 *dst = (__be64 *)out;
+        __be64 bits[2];
+        static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
+
+        /* save number of bits */
+        bits[1] = cpu_to_be64(sctx->count[0] << 3);
+        bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
+
+        /* Pad out to 112 mod 128 and append length */
+        index = sctx->count[0] & 0x7f;
+        padlen = (index < 112) ? (112 - index) : ((128+112) - index);
+
+        if (!may_use_simd()) {
+                crypto_sha512_update(desc, padding, padlen);
+                crypto_sha512_update(desc, (const u8 *)&bits, sizeof(bits));
+        } else {
+                kernel_neon_begin();
+                /* We need to fill a whole block for __sha512_neon_update() */
+                if (padlen <= 112) {
+                        sctx->count[0] += padlen;
+                        if (sctx->count[0] < padlen)
+                                sctx->count[1]++;
+                        memcpy(sctx->buf + index, padding, padlen);
+                } else {
+                        __sha512_neon_update(desc, padding, padlen, index);
+                }
+                __sha512_neon_update(desc, (const u8 *)&bits,
+                                        sizeof(bits), 112);
+                kernel_neon_end();
+        }
+
+        /* Store state in digest */
+        for (i = 0; i < 8; i++)
+                dst[i] = cpu_to_be64(sctx->state[i]);
+
+        /* Wipe context */
+        memset(sctx, 0, sizeof(*sctx));
+
+        return 0;
+}
+
+static int sha512_neon_export(struct shash_desc *desc, void *out)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+
+        memcpy(out, sctx, sizeof(*sctx));
+
+        return 0;
+}
+
+static int sha512_neon_import(struct shash_desc *desc, const void *in)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+
+        memcpy(sctx, in, sizeof(*sctx));
+
+        return 0;
+}
+
+static int sha384_neon_init(struct shash_desc *desc)
+{
+        struct sha512_state *sctx = shash_desc_ctx(desc);
+
+        sctx->state[0] = SHA384_H0;
+        sctx->state[1] = SHA384_H1;
+        sctx->state[2] = SHA384_H2;
+        sctx->state[3] = SHA384_H3;
+        sctx->state[4] = SHA384_H4;
+        sctx->state[5] = SHA384_H5;
+        sctx->state[6] = SHA384_H6;
+        sctx->state[7] = SHA384_H7;
+
+        sctx->count[0] = sctx->count[1] = 0;
+
+        return 0;
+}
+
+static int sha384_neon_final(struct shash_desc *desc, u8 *hash)
+{
+        u8 D[SHA512_DIGEST_SIZE];
+
+        sha512_neon_final(desc, D);
+
+        memcpy(hash, D, SHA384_DIGEST_SIZE);
+        memset(D, 0, SHA512_DIGEST_SIZE);
+
+        return 0;
+}
+
+static struct shash_alg algs[] = { {
+        .digestsize     =       SHA512_DIGEST_SIZE,
+        .init           =       sha512_neon_init,
+        .update         =       sha512_neon_update,
+        .final          =       sha512_neon_final,
+        .export         =       sha512_neon_export,
+        .import         =       sha512_neon_import,
+        .descsize       =       sizeof(struct sha512_state),
+        .statesize      =       sizeof(struct sha512_state),
+        .base           =       {
+                .cra_name       =       "sha512",
+                .cra_driver_name =      "sha512-neon",
+                .cra_priority   =       250,
+                .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
+                .cra_blocksize  =       SHA512_BLOCK_SIZE,
+                .cra_module     =       THIS_MODULE,
+        }
+},  {
+        .digestsize     =       SHA384_DIGEST_SIZE,
+        .init           =       sha384_neon_init,
+        .update         =       sha512_neon_update,
+        .final          =       sha384_neon_final,
+        .export         =       sha512_neon_export,
+        .import         =       sha512_neon_import,
+        .descsize       =       sizeof(struct sha512_state),
+        .statesize      =       sizeof(struct sha512_state),
+        .base           =       {
+                .cra_name       =       "sha384",
+                .cra_driver_name =      "sha384-neon",
+                .cra_priority   =       250,
+                .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
+                .cra_blocksize  =       SHA384_BLOCK_SIZE,
+                .cra_module     =       THIS_MODULE,
+        }
+} };
+
+static int __init sha512_neon_mod_init(void)
+{
+        if (!cpu_has_neon())
+                return -ENODEV;
+
+        return crypto_register_shashes(algs, ARRAY_SIZE(algs));
+}
+
+static void __exit sha512_neon_mod_fini(void)
+{
+        crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+}
+
+module_init(sha512_neon_mod_init);
+module_exit(sha512_neon_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, NEON accelerated");
+
+MODULE_ALIAS("sha512");
+MODULE_ALIAS("sha384");