1 // SPDX-License-Identifier: GPL-2.0 OR MIT
3  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
20 	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
21 	{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
22 	{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
23 	{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
24 	{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
25 	{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
26 	{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
27 	{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
28 	{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
29 	{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
35 	state->t[0] += inc;  in blake2s_increment_counter()
36 	state->t[1] += (state->t[0] < inc);  in blake2s_increment_counter()
50 	while (nblocks > 0) {  in blake2s_compress_generic()
54 		memcpy(v, state->h, 32);  in blake2s_compress_generic()
56 		v[ 9] = BLAKE2S_IV1;  in blake2s_compress_generic()
59 		v[12] = BLAKE2S_IV4 ^ state->t[0];  in blake2s_compress_generic()
60 		v[13] = BLAKE2S_IV5 ^ state->t[1];  in blake2s_compress_generic()
61 		v[14] = BLAKE2S_IV6 ^ state->f[0];  in blake2s_compress_generic()
62 		v[15] = BLAKE2S_IV7 ^ state->f[1];  in blake2s_compress_generic()
64 #define G(r, i, a, b, c, d) do { \  in blake2s_compress_generic()  argument
65 	a += b + m[blake2s_sigma[r][2 * i + 0]]; \  in blake2s_compress_generic()
66 	d = ror32(d ^ a, 16); \  in blake2s_compress_generic()
68 	b = ror32(b ^ c, 12); \  in blake2s_compress_generic()
69 	a += b + m[blake2s_sigma[r][2 * i + 1]]; \  in blake2s_compress_generic()
70 	d = ror32(d ^ a, 8); \  in blake2s_compress_generic()
72 	b = ror32(b ^ c, 7); \  in blake2s_compress_generic()
73 } while (0)  in blake2s_compress_generic()
76 	G(r, 0, v[0], v[ 4], v[ 8], v[12]); \  in blake2s_compress_generic()
77 	G(r, 1, v[1], v[ 5], v[ 9], v[13]); \  in blake2s_compress_generic()
80 	G(r, 4, v[0], v[ 5], v[10], v[15]); \  in blake2s_compress_generic()
83 	G(r, 7, v[3], v[ 4], v[ 9], v[14]); \  in blake2s_compress_generic()
84 } while (0)  in blake2s_compress_generic()
85 		ROUND(0);  in blake2s_compress_generic()
94 		ROUND(9);  in blake2s_compress_generic()
99 		for (i = 0; i < 8; ++i)  in blake2s_compress_generic()
100 			state->h[i] ^= v[i] ^ v[i + 8];  in blake2s_compress_generic()
103 		--nblocks;  in blake2s_compress_generic()
115 	state->f[0] = -1;  in blake2s_set_lastblock()
120 	const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;  in blake2s_update()
125 		memcpy(state->buf + state->buflen, in, fill);  in blake2s_update()
126 		blake2s_compress(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);  in blake2s_update()
127 		state->buflen = 0;  in blake2s_update()
129 		inlen -= fill;  in blake2s_update()
133 		blake2s_compress(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);  in blake2s_update()
134 		in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);  in blake2s_update()
135 		inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);  in blake2s_update()
137 	memcpy(state->buf + state->buflen, in, inlen);  in blake2s_update()
138 	state->buflen += inlen;  in blake2s_update()
146 	memset(state->buf + state->buflen, 0,  in blake2s_final()
147 	       BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */  in blake2s_final()
148 	blake2s_compress(state, state->buf, 1, state->buflen);  in blake2s_final()
149 	cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));  in blake2s_final()
150 	memcpy(out, state->h, state->outlen);  in blake2s_final()
159 	return 0;  in blake2s_mod_init()
165 MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");