/* SPDX-License-Identifier: GPL-2.0-only */ /* * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and described * at https://datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02 * * Copyright (C) 2017 ARM Limited or its affiliates. * Copyright (C) 2017 Gilad Ben-Yossef <gilad@benyossef.com> * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> */ #include <linux/module.h> #include <asm/unaligned.h> #include <crypto/sm3.h> static const u32 ____cacheline_aligned K[64] = { 0x79cc4519, 0xf3988a32, 0xe7311465, 0xce6228cb, 0x9cc45197, 0x3988a32f, 0x7311465e, 0xe6228cbc, 0xcc451979, 0x988a32f3, 0x311465e7, 0x6228cbce, 0xc451979c, 0x88a32f39, 0x11465e73, 0x228cbce6, 0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c, 0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce, 0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec, 0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5, 0x7a879d8a, 0xf50f3b14, 0xea1e7629, 0xd43cec53, 0xa879d8a7, 0x50f3b14f, 0xa1e7629e, 0x43cec53d, 0x879d8a7a, 0x0f3b14f5, 0x1e7629ea, 0x3cec53d4, 0x79d8a7a8, 0xf3b14f50, 0xe7629ea1, 0xcec53d43, 0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c, 0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce, 0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec, 0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5 }; /* * Transform the message X which consists of 16 32-bit-words. See * GM/T 004-2012 for details. */ #define R(i, a, b, c, d, e, f, g, h, t, w1, w2) \ do { \ ss1 = rol32((rol32((a), 12) + (e) + (t)), 7); \ ss2 = ss1 ^ rol32((a), 12); \ d += FF ## i(a, b, c) + ss2 + ((w1) ^ (w2)); \ h += GG ## i(e, f, g) + ss1 + (w1); \ b = rol32((b), 9); \ f = rol32((f), 19); \ h = P0((h)); \ } while (0) #define R1(a, b, c, d, e, f, g, h, t, w1, w2) \ R(1, a, b, c, d, e, f, g, h, t, w1, w2) #define R2(a, b, c, d, e, f, g, h, t, w1, w2) \ R(2, a, b, c, d, e, f, g, h, t, w1, w2) #define FF1(x, y, z) (x ^ y ^ z) #define FF2(x, y, z) ((x & y) | (x & z) | (y & z)) #define GG1(x, y, z) FF1(x, y, z) #define GG2(x, y, z) ((x & y) | (~x & z)) /* Message expansion */ #define P0(x) ((x) ^ rol32((x), 9) ^ rol32((x), 17)) #define P1(x) ((x) ^ rol32((x), 15) ^ rol32((x), 23)) #define I(i) (W[i] = get_unaligned_be32(data + i * 4)) #define W1(i) (W[i & 0x0f]) #define W2(i) (W[i & 0x0f] = \ P1(W[i & 0x0f] \ ^ W[(i-9) & 0x0f] \ ^ rol32(W[(i-3) & 0x0f], 15)) \ ^ rol32(W[(i-13) & 0x0f], 7) \ ^ W[(i-6) & 0x0f]) static void sm3_transform(struct sm3_state *sctx, u8 const *data, u32 W[16]) { u32 a, b, c, d, e, f, g, h, ss1, ss2; a = sctx->state[0]; b = sctx->state[1]; c = sctx->state[2]; d = sctx->state[3]; e = sctx->state[4]; f = sctx->state[5]; g = sctx->state[6]; h = sctx->state[7]; R1(a, b, c, d, e, f, g, h, K[0], I(0), I(4)); R1(d, a, b, c, h, e, f, g, K[1], I(1), I(5)); R1(c, d, a, b, g, h, e, f, K[2], I(2), I(6)); R1(b, c, d, a, f, g, h, e, K[3], I(3), I(7)); R1(a, b, c, d, e, f, g, h, K[4], W1(4), I(8)); R1(d, a, b, c, h, e, f, g, K[5], W1(5), I(9)); R1(c, d, a, b, g, h, e, f, K[6], W1(6), I(10)); R1(b, c, d, a, f, g, h, e, K[7], W1(7), I(11)); R1(a, b, c, d, e, f, g, h, K[8], W1(8), I(12)); R1(d, a, b, c, h, e, f, g, K[9], W1(9), I(13)); R1(c, d, a, b, g, h, e, f, K[10], W1(10), I(14)); R1(b, c, d, a, f, g, h, e, K[11], W1(11), I(15)); R1(a, b, c, d, e, f, g, h, K[12], W1(12), W2(16)); R1(d, a, b, c, h, e, f, g, K[13], W1(13), W2(17)); R1(c, d, a, b, g, h, e, f, K[14], W1(14), W2(18)); R1(b, c, d, a, f, g, h, e, K[15], W1(15), W2(19)); R2(a, b, c, d, e, f, g, h, K[16], W1(16), W2(20)); R2(d, a, b, c, h, e, f, g, K[17], W1(17), W2(21)); R2(c, d, a, b, g, h, e, f, K[18], W1(18), W2(22)); R2(b, c, d, a, f, g, h, e, K[19], W1(19), W2(23)); R2(a, b, c, d, e, f, g, h, K[20], W1(20), W2(24)); R2(d, a, b, c, h, e, f, g, K[21], W1(21), W2(25)); R2(c, d, a, b, g, h, e, f, K[22], W1(22), W2(26)); R2(b, c, d, a, f, g, h, e, K[23], W1(23), W2(27)); R2(a, b, c, d, e, f, g, h, K[24], W1(24), W2(28)); R2(d, a, b, c, h, e, f, g, K[25], W1(25), W2(29)); R2(c, d, a, b, g, h, e, f, K[26], W1(26), W2(30)); R2(b, c, d, a, f, g, h, e, K[27], W1(27), W2(31)); R2(a, b, c, d, e, f, g, h, K[28], W1(28), W2(32)); R2(d, a, b, c, h, e, f, g, K[29], W1(29), W2(33)); R2(c, d, a, b, g, h, e, f, K[30], W1(30), W2(34)); R2(b, c, d, a, f, g, h, e, K[31], W1(31), W2(35)); R2(a, b, c, d, e, f, g, h, K[32], W1(32), W2(36)); R2(d, a, b, c, h, e, f, g, K[33], W1(33), W2(37)); R2(c, d, a, b, g, h, e, f, K[34], W1(34), W2(38)); R2(b, c, d, a, f, g, h, e, K[35], W1(35), W2(39)); R2(a, b, c, d, e, f, g, h, K[36], W1(36), W2(40)); R2(d, a, b, c, h, e, f, g, K[37], W1(37), W2(41)); R2(c, d, a, b, g, h, e, f, K[38], W1(38), W2(42)); R2(b, c, d, a, f, g, h, e, K[39], W1(39), W2(43)); R2(a, b, c, d, e, f, g, h, K[40], W1(40), W2(44)); R2(d, a, b, c, h, e, f, g, K[41], W1(41), W2(45)); R2(c, d, a, b, g, h, e, f, K[42], W1(42), W2(46)); R2(b, c, d, a, f, g, h, e, K[43], W1(43), W2(47)); R2(a, b, c, d, e, f, g, h, K[44], W1(44), W2(48)); R2(d, a, b, c, h, e, f, g, K[45], W1(45), W2(49)); R2(c, d, a, b, g, h, e, f, K[46], W1(46), W2(50)); R2(b, c, d, a, f, g, h, e, K[47], W1(47), W2(51)); R2(a, b, c, d, e, f, g, h, K[48], W1(48), W2(52)); R2(d, a, b, c, h, e, f, g, K[49], W1(49), W2(53)); R2(c, d, a, b, g, h, e, f, K[50], W1(50), W2(54)); R2(b, c, d, a, f, g, h, e, K[51], W1(51), W2(55)); R2(a, b, c, d, e, f, g, h, K[52], W1(52), W2(56)); R2(d, a, b, c, h, e, f, g, K[53], W1(53), W2(57)); R2(c, d, a, b, g, h, e, f, K[54], W1(54), W2(58)); R2(b, c, d, a, f, g, h, e, K[55], W1(55), W2(59)); R2(a, b, c, d, e, f, g, h, K[56], W1(56), W2(60)); R2(d, a, b, c, h, e, f, g, K[57], W1(57), W2(61)); R2(c, d, a, b, g, h, e, f, K[58], W1(58), W2(62)); R2(b, c, d, a, f, g, h, e, K[59], W1(59), W2(63)); R2(a, b, c, d, e, f, g, h, K[60], W1(60), W2(64)); R2(d, a, b, c, h, e, f, g, K[61], W1(61), W2(65)); R2(c, d, a, b, g, h, e, f, K[62], W1(62), W2(66)); R2(b, c, d, a, f, g, h, e, K[63], W1(63), W2(67)); sctx->state[0] ^= a; sctx->state[1] ^= b; sctx->state[2] ^= c; sctx->state[3] ^= d; sctx->state[4] ^= e; sctx->state[5] ^= f; sctx->state[6] ^= g; sctx->state[7] ^= h; } #undef R #undef R1 #undef R2 #undef I #undef W1 #undef W2 static inline void sm3_block(struct sm3_state *sctx, u8 const *data, int blocks, u32 W[16]) { while (blocks--) { sm3_transform(sctx, data, W); data += SM3_BLOCK_SIZE; } } void sm3_update(struct sm3_state *sctx, const u8 *data, unsigned int len) { unsigned int partial = sctx->count % SM3_BLOCK_SIZE; u32 W[16]; sctx->count += len; if ((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; sm3_block(sctx, sctx->buffer, 1, W); } blocks = len / SM3_BLOCK_SIZE; len %= SM3_BLOCK_SIZE; if (blocks) { sm3_block(sctx, data, blocks, W); data += blocks * SM3_BLOCK_SIZE; } memzero_explicit(W, sizeof(W)); partial = 0; } if (len) memcpy(sctx->buffer + partial, data, len); } EXPORT_SYMBOL_GPL(sm3_update); void sm3_final(struct sm3_state *sctx, u8 *out) { const int bit_offset = SM3_BLOCK_SIZE - sizeof(u64); __be64 *bits = (__be64 *)(sctx->buffer + bit_offset); __be32 *digest = (__be32 *)out; unsigned int partial = sctx->count % SM3_BLOCK_SIZE; u32 W[16]; int i; sctx->buffer[partial++] = 0x80; if (partial > bit_offset) { memset(sctx->buffer + partial, 0, SM3_BLOCK_SIZE - partial); partial = 0; sm3_block(sctx, sctx->buffer, 1, W); } memset(sctx->buffer + partial, 0, bit_offset - partial); *bits = cpu_to_be64(sctx->count << 3); sm3_block(sctx, sctx->buffer, 1, W); for (i = 0; i < 8; i++) put_unaligned_be32(sctx->state[i], digest++); /* Zeroize sensitive information. */ memzero_explicit(W, sizeof(W)); memzero_explicit(sctx, sizeof(*sctx)); } EXPORT_SYMBOL_GPL(sm3_final); MODULE_DESCRIPTION("Generic SM3 library"); MODULE_LICENSE("GPL v2");