1 files changed, 202 insertions, 0 deletions
diff --git a/module/icp/algs/blake3/blake3_generic.c b/module/icp/algs/blake3/blake3_generic.c
new file mode 100644
index 000000000..6ff9a845c
--- /dev/null
+++ b/module/icp/algs/blake3/blake3_generic.c
@@ -0,0 +1,202 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Based on BLAKE3 v1.3.1, https://github.com/BLAKE3-team/BLAKE3
+ * Copyright (c) 2019-2020 Samuel Neves and Jack O'Connor
+ * Copyright (c) 2021-2022 Tino Reichardt <[email protected]>
+ */
+
+#include <sys/zfs_context.h>
+#include "blake3_impl.h"
+
+#define	rotr32(x, n)	(((x) >> (n)) | ((x) << (32 - (n))))
+static inline void g(uint32_t *state, size_t a, size_t b, size_t c, size_t d,
+    uint32_t x, uint32_t y)
+{
+	state[a] = state[a] + state[b] + x;
+	state[d] = rotr32(state[d] ^ state[a], 16);
+	state[c] = state[c] + state[d];
+	state[b] = rotr32(state[b] ^ state[c], 12);
+	state[a] = state[a] + state[b] + y;
+	state[d] = rotr32(state[d] ^ state[a], 8);
+	state[c] = state[c] + state[d];
+	state[b] = rotr32(state[b] ^ state[c], 7);
+}
+
+static inline void round_fn(uint32_t state[16], const uint32_t *msg,
+    size_t round)
+{
+	/* Select the message schedule based on the round. */
+	const uint8_t *schedule = BLAKE3_MSG_SCHEDULE[round];
+
+	/* Mix the columns. */
+	g(state, 0, 4, 8, 12, msg[schedule[0]], msg[schedule[1]]);
+	g(state, 1, 5, 9, 13, msg[schedule[2]], msg[schedule[3]]);
+	g(state, 2, 6, 10, 14, msg[schedule[4]], msg[schedule[5]]);
+	g(state, 3, 7, 11, 15, msg[schedule[6]], msg[schedule[7]]);
+
+	/* Mix the rows. */
+	g(state, 0, 5, 10, 15, msg[schedule[8]], msg[schedule[9]]);
+	g(state, 1, 6, 11, 12, msg[schedule[10]], msg[schedule[11]]);
+	g(state, 2, 7, 8, 13, msg[schedule[12]], msg[schedule[13]]);
+	g(state, 3, 4, 9, 14, msg[schedule[14]], msg[schedule[15]]);
+}
+
+static inline void compress_pre(uint32_t state[16], const uint32_t cv[8],
+    const uint8_t block[BLAKE3_BLOCK_LEN], uint8_t block_len,
+    uint64_t counter, uint8_t flags)
+{
+	uint32_t block_words[16];
+	block_words[0] = load32(block + 4 * 0);
+	block_words[1] = load32(block + 4 * 1);
+	block_words[2] = load32(block + 4 * 2);
+	block_words[3] = load32(block + 4 * 3);
+	block_words[4] = load32(block + 4 * 4);
+	block_words[5] = load32(block + 4 * 5);
+	block_words[6] = load32(block + 4 * 6);
+	block_words[7] = load32(block + 4 * 7);
+	block_words[8] = load32(block + 4 * 8);
+	block_words[9] = load32(block + 4 * 9);
+	block_words[10] = load32(block + 4 * 10);
+	block_words[11] = load32(block + 4 * 11);
+	block_words[12] = load32(block + 4 * 12);
+	block_words[13] = load32(block + 4 * 13);
+	block_words[14] = load32(block + 4 * 14);
+	block_words[15] = load32(block + 4 * 15);
+
+	state[0] = cv[0];
+	state[1] = cv[1];
+	state[2] = cv[2];
+	state[3] = cv[3];
+	state[4] = cv[4];
+	state[5] = cv[5];
+	state[6] = cv[6];
+	state[7] = cv[7];
+	state[8] = BLAKE3_IV[0];
+	state[9] = BLAKE3_IV[1];
+	state[10] = BLAKE3_IV[2];
+	state[11] = BLAKE3_IV[3];
+	state[12] = counter_low(counter);
+	state[13] = counter_high(counter);
+	state[14] = (uint32_t)block_len;
+	state[15] = (uint32_t)flags;
+
+	round_fn(state, &block_words[0], 0);
+	round_fn(state, &block_words[0], 1);
+	round_fn(state, &block_words[0], 2);
+	round_fn(state, &block_words[0], 3);
+	round_fn(state, &block_words[0], 4);
+	round_fn(state, &block_words[0], 5);
+	round_fn(state, &block_words[0], 6);
+}
+
+static inline void blake3_compress_in_place_generic(uint32_t cv[8],
+    const uint8_t block[BLAKE3_BLOCK_LEN], uint8_t block_len,
+    uint64_t counter, uint8_t flags)
+{
+	uint32_t state[16];
+	compress_pre(state, cv, block, block_len, counter, flags);
+	cv[0] = state[0] ^ state[8];
+	cv[1] = state[1] ^ state[9];
+	cv[2] = state[2] ^ state[10];
+	cv[3] = state[3] ^ state[11];
+	cv[4] = state[4] ^ state[12];
+	cv[5] = state[5] ^ state[13];
+	cv[6] = state[6] ^ state[14];
+	cv[7] = state[7] ^ state[15];
+}
+
+static inline void hash_one_generic(const uint8_t *input, size_t blocks,
+    const uint32_t key[8], uint64_t counter, uint8_t flags,
+    uint8_t flags_start, uint8_t flags_end, uint8_t out[BLAKE3_OUT_LEN])
+{
+	uint32_t cv[8];
+	memcpy(cv, key, BLAKE3_KEY_LEN);
+	uint8_t block_flags = flags | flags_start;
+	while (blocks > 0) {
+		if (blocks == 1) {
+			block_flags |= flags_end;
+		}
+		blake3_compress_in_place_generic(cv, input, BLAKE3_BLOCK_LEN,
+		    counter, block_flags);
+		input = &input[BLAKE3_BLOCK_LEN];
+		blocks -= 1;
+		block_flags = flags;
+	}
+	store_cv_words(out, cv);
+}
+
+static inline void blake3_compress_xof_generic(const uint32_t cv[8],
+    const uint8_t block[BLAKE3_BLOCK_LEN], uint8_t block_len,
+    uint64_t counter, uint8_t flags, uint8_t out[64])
+{
+	uint32_t state[16];
+	compress_pre(state, cv, block, block_len, counter, flags);
+
+	store32(&out[0 * 4], state[0] ^ state[8]);
+	store32(&out[1 * 4], state[1] ^ state[9]);
+	store32(&out[2 * 4], state[2] ^ state[10]);
+	store32(&out[3 * 4], state[3] ^ state[11]);
+	store32(&out[4 * 4], state[4] ^ state[12]);
+	store32(&out[5 * 4], state[5] ^ state[13]);
+	store32(&out[6 * 4], state[6] ^ state[14]);
+	store32(&out[7 * 4], state[7] ^ state[15]);
+	store32(&out[8 * 4], state[8] ^ cv[0]);
+	store32(&out[9 * 4], state[9] ^ cv[1]);
+	store32(&out[10 * 4], state[10] ^ cv[2]);
+	store32(&out[11 * 4], state[11] ^ cv[3]);
+	store32(&out[12 * 4], state[12] ^ cv[4]);
+	store32(&out[13 * 4], state[13] ^ cv[5]);
+	store32(&out[14 * 4], state[14] ^ cv[6]);
+	store32(&out[15 * 4], state[15] ^ cv[7]);
+}
+
+static inline void blake3_hash_many_generic(const uint8_t * const *inputs,
+    size_t num_inputs, size_t blocks, const uint32_t key[8], uint64_t counter,
+    boolean_t increment_counter, uint8_t flags, uint8_t flags_start,
+    uint8_t flags_end, uint8_t *out)
+{
+	while (num_inputs > 0) {
+		hash_one_generic(inputs[0], blocks, key, counter, flags,
+		    flags_start, flags_end, out);
+		if (increment_counter) {
+			counter += 1;
+		}
+		inputs += 1;
+		num_inputs -= 1;
+		out = &out[BLAKE3_OUT_LEN];
+	}
+}
+
+static inline boolean_t blake3_is_generic_supported(void)
+{
+	return (B_TRUE);
+}
+
+const blake3_impl_ops_t blake3_generic_impl = {
+	.compress_in_place = blake3_compress_in_place_generic,
+	.compress_xof = blake3_compress_xof_generic,
+	.hash_many = blake3_hash_many_generic,
+	.is_supported = blake3_is_generic_supported,
+	.degree = 4,
+	.name = "generic"
+};