--- /dev/null
+/*
+ * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
+ * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
+ *
+ * Copyright (C) 2017 ARM Limited or its affiliates.
+ * Written by Gilad Ben-Yossef <gilad@benyossef.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <crypto/sm3.h>
+#include <crypto/sm3_base.h>
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
+ 0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
+ 0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
+ 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
+ 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
+};
+EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
+
+static inline u32 p0(u32 x)
+{
+ return x ^ rol32(x, 9) ^ rol32(x, 17);
+}
+
+static inline u32 p1(u32 x)
+{
+ return x ^ rol32(x, 15) ^ rol32(x, 23);
+}
+
+static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)
+{
+ return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));
+}
+
+static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)
+{
+ return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));
+}
+
+static inline u32 t(unsigned int n)
+{
+ return (n < 16) ? SM3_T1 : SM3_T2;
+}
+
+static void sm3_expand(u32 *t, u32 *w, u32 *wt)
+{
+ int i;
+ unsigned int tmp;
+
+ /* load the input */
+ for (i = 0; i <= 15; i++)
+ w[i] = get_unaligned_be32((__u32 *)t + i);
+
+ for (i = 16; i <= 67; i++) {
+ tmp = w[i - 16] ^ w[i - 9] ^ rol32(w[i - 3], 15);
+ w[i] = p1(tmp) ^ (rol32(w[i - 13], 7)) ^ w[i - 6];
+ }
+
+ for (i = 0; i <= 63; i++)
+ wt[i] = w[i] ^ w[i + 4];
+}
+
+static void sm3_compress(u32 *w, u32 *wt, u32 *m)
+{
+ u32 ss1;
+ u32 ss2;
+ u32 tt1;
+ u32 tt2;
+ u32 a, b, c, d, e, f, g, h;
+ int i;
+
+ a = m[0];
+ b = m[1];
+ c = m[2];
+ d = m[3];
+ e = m[4];
+ f = m[5];
+ g = m[6];
+ h = m[7];
+
+ for (i = 0; i <= 63; i++) {
+
+ ss1 = rol32((rol32(a, 12) + e + rol32(t(i), i)), 7);
+
+ ss2 = ss1 ^ rol32(a, 12);
+
+ tt1 = ff(i, a, b, c) + d + ss2 + *wt;
+ wt++;
+
+ tt2 = gg(i, e, f, g) + h + ss1 + *w;
+ w++;
+
+ d = c;
+ c = rol32(b, 9);
+ b = a;
+ a = tt1;
+ h = g;
+ g = rol32(f, 19);
+ f = e;
+ e = p0(tt2);
+ }
+
+ m[0] = a ^ m[0];
+ m[1] = b ^ m[1];
+ m[2] = c ^ m[2];
+ m[3] = d ^ m[3];
+ m[4] = e ^ m[4];
+ m[5] = f ^ m[5];
+ m[6] = g ^ m[6];
+ m[7] = h ^ m[7];
+
+ a = b = c = d = e = f = g = h = ss1 = ss2 = tt1 = tt2 = 0;
+}
+
+static void sm3_transform(struct sm3_state *sst, u8 const *src)
+{
+ unsigned int w[68];
+ unsigned int wt[64];
+
+ sm3_expand((u32 *)src, w, wt);
+ sm3_compress(w, wt, sst->state);
+
+ memzero_explicit(w, sizeof(w));
+ memzero_explicit(wt, sizeof(wt));
+}
+
+static void sm3_generic_block_fn(struct sm3_state *sst, u8 const *src,
+ int blocks)
+{
+ while (blocks--) {
+ sm3_transform(sst, src);
+ src += SM3_BLOCK_SIZE;
+ }
+}
+
+int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
+}
+EXPORT_SYMBOL(crypto_sm3_update);
+
+static int sm3_final(struct shash_desc *desc, u8 *out)
+{
+ sm3_base_do_finalize(desc, sm3_generic_block_fn);
+ return sm3_base_finish(desc, out);
+}
+
+int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *hash)
+{
+ sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
+ return sm3_final(desc, hash);
+}
+EXPORT_SYMBOL(crypto_sm3_finup);
+
+static struct shash_alg sm3_alg = {
+ .digestsize = SM3_DIGEST_SIZE,
+ .init = sm3_base_init,
+ .update = crypto_sm3_update,
+ .final = sm3_final,
+ .finup = crypto_sm3_finup,
+ .descsize = sizeof(struct sm3_state),
+ .base = {
+ .cra_name = "sm3",
+ .cra_driver_name = "sm3-generic",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SM3_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static int __init sm3_generic_mod_init(void)
+{
+ return crypto_register_shash(&sm3_alg);
+}
+
+static void __exit sm3_generic_mod_fini(void)
+{
+ crypto_unregister_shash(&sm3_alg);
+}
+
+module_init(sm3_generic_mod_init);
+module_exit(sm3_generic_mod_fini);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
+
+MODULE_ALIAS_CRYPTO("sm3");
+MODULE_ALIAS_CRYPTO("sm3-generic");
--- /dev/null
+/*
+ * sm3_base.h - core logic for SM3 implementations
+ *
+ * Copyright (C) 2017 ARM Limited or its affiliates.
+ * Written by Gilad Ben-Yossef <gilad@benyossef.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <crypto/internal/hash.h>
+#include <crypto/sm3.h>
+#include <linux/crypto.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+
+typedef void (sm3_block_fn)(struct sm3_state *sst, u8 const *src, int blocks);
+
+static inline int sm3_base_init(struct shash_desc *desc)
+{
+ struct sm3_state *sctx = shash_desc_ctx(desc);
+
+ sctx->state[0] = SM3_IVA;
+ sctx->state[1] = SM3_IVB;
+ sctx->state[2] = SM3_IVC;
+ sctx->state[3] = SM3_IVD;
+ sctx->state[4] = SM3_IVE;
+ sctx->state[5] = SM3_IVF;
+ sctx->state[6] = SM3_IVG;
+ sctx->state[7] = SM3_IVH;
+ sctx->count = 0;
+
+ return 0;
+}
+
+static inline int sm3_base_do_update(struct shash_desc *desc,
+ const u8 *data,
+ unsigned int len,
+ sm3_block_fn *block_fn)
+{
+ struct sm3_state *sctx = shash_desc_ctx(desc);
+ unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
+
+ sctx->count += len;
+
+ if (unlikely((partial + len) >= SM3_BLOCK_SIZE)) {
+ int blocks;
+
+ if (partial) {
+ int p = SM3_BLOCK_SIZE - partial;
+
+ memcpy(sctx->buffer + partial, data, p);
+ data += p;
+ len -= p;
+
+ block_fn(sctx, sctx->buffer, 1);
+ }
+
+ blocks = len / SM3_BLOCK_SIZE;
+ len %= SM3_BLOCK_SIZE;
+
+ if (blocks) {
+ block_fn(sctx, data, blocks);
+ data += blocks * SM3_BLOCK_SIZE;
+ }
+ partial = 0;
+ }
+ if (len)
+ memcpy(sctx->buffer + partial, data, len);
+
+ return 0;
+}
+
+static inline int sm3_base_do_finalize(struct shash_desc *desc,
+ sm3_block_fn *block_fn)
+{
+ const int bit_offset = SM3_BLOCK_SIZE - sizeof(__be64);
+ struct sm3_state *sctx = shash_desc_ctx(desc);
+ __be64 *bits = (__be64 *)(sctx->buffer + bit_offset);
+ unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
+
+ sctx->buffer[partial++] = 0x80;
+ if (partial > bit_offset) {
+ memset(sctx->buffer + partial, 0x0, SM3_BLOCK_SIZE - partial);
+ partial = 0;
+
+ block_fn(sctx, sctx->buffer, 1);
+ }
+
+ memset(sctx->buffer + partial, 0x0, bit_offset - partial);
+ *bits = cpu_to_be64(sctx->count << 3);
+ block_fn(sctx, sctx->buffer, 1);
+
+ return 0;
+}
+
+static inline int sm3_base_finish(struct shash_desc *desc, u8 *out)
+{
+ struct sm3_state *sctx = shash_desc_ctx(desc);
+ __be32 *digest = (__be32 *)out;
+ int i;
+
+ for (i = 0; i < SM3_DIGEST_SIZE / sizeof(__be32); i++)
+ put_unaligned_be32(sctx->state[i], digest++);
+
+ *sctx = (struct sm3_state){};
+ return 0;
+}
projects / mirror_ubuntu-focal-kernel.git / commitdiff