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[src/trunk]: src/sys/crypto/blake2 Import small BLAKE2s implementation.
details: https://anonhg.NetBSD.org/src/rev/95fcf9b8d3bb
branches: trunk
changeset: 937497:95fcf9b8d3bb
user: riastradh <riastradh%NetBSD.org@localhost>
date: Thu Aug 20 21:21:05 2020 +0000
description:
Import small BLAKE2s implementation.
diffstat:
sys/crypto/blake2/blake2s.c | 350 ++++++++++++++++++++++++++++++++++++++++
sys/crypto/blake2/blake2s.h | 56 ++++++
sys/crypto/blake2/files.blake2s | 5 +
3 files changed, 411 insertions(+), 0 deletions(-)
diffs (truncated from 423 to 300 lines):
diff -r 4d4edc7277cd -r 95fcf9b8d3bb sys/crypto/blake2/blake2s.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/crypto/blake2/blake2s.c Thu Aug 20 21:21:05 2020 +0000
@@ -0,0 +1,350 @@
+/* $NetBSD: blake2s.c,v 1.1 2020/08/20 21:21:05 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2015 Taylor R. Campbell
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef _KERNEL
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: blake2s.c,v 1.1 2020/08/20 21:21:05 riastradh Exp $");
+
+#include <sys/types.h>
+#include <sys/module.h>
+
+#include <lib/libkern/libkern.h>
+
+#else
+
+#define _POSIX_C_SOURCE 200809L
+
+#include <assert.h>
+#include <stdint.h>
+#include <string.h>
+
+#endif
+
+#include "blake2s.h"
+
+#include <sys/endian.h>
+
+static inline uint32_t
+rotr32(uint32_t x, unsigned c)
+{
+
+ return ((x >> c) | (x << (32 - c)));
+}
+
+#define BLAKE2S_G(VA, VB, VC, VD, X, Y) do \
+{ \
+ (VA) = (VA) + (VB) + (X); \
+ (VD) = rotr32((VD) ^ (VA), 16); \
+ (VC) = (VC) + (VD); \
+ (VB) = rotr32((VB) ^ (VC), 12); \
+ (VA) = (VA) + (VB) + (Y); \
+ (VD) = rotr32((VD) ^ (VA), 8); \
+ (VC) = (VC) + (VD); \
+ (VB) = rotr32((VB) ^ (VC), 7); \
+} while (0)
+
+static const uint32_t blake2s_iv[8] = {
+ 0x6a09e667U, 0xbb67ae85U, 0x3c6ef372U, 0xa54ff53aU,
+ 0x510e527fU, 0x9b05688cU, 0x1f83d9abU, 0x5be0cd19U,
+};
+
+static const uint8_t blake2s_sigma[10][16] = {
+ { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
+ { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
+ { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
+ { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
+ { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
+ { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
+ { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
+ { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
+ { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
+ { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
+};
+
+static void
+blake2s_compress(uint32_t h[8], uint64_t c, uint32_t last,
+ const uint8_t in[64])
+{
+ uint32_t v0,v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13,v14,v15;
+ uint32_t m[16];
+ unsigned i;
+
+ /* Load the variables: first 8 from state, next 8 from IV. */
+ v0 = h[0];
+ v1 = h[1];
+ v2 = h[2];
+ v3 = h[3];
+ v4 = h[4];
+ v5 = h[5];
+ v6 = h[6];
+ v7 = h[7];
+ v8 = blake2s_iv[0];
+ v9 = blake2s_iv[1];
+ v10 = blake2s_iv[2];
+ v11 = blake2s_iv[3];
+ v12 = blake2s_iv[4];
+ v13 = blake2s_iv[5];
+ v14 = blake2s_iv[6];
+ v15 = blake2s_iv[7];
+
+ /* Incorporate the block counter and whether this is last. */
+ v12 ^= c & 0xffffffffU;
+ v13 ^= c >> 32;
+ v14 ^= last;
+
+ /* Load the message block. */
+ for (i = 0; i < 16; i++)
+ m[i] = le32dec(in + 4*i);
+
+ /* Transform the variables. */
+ for (i = 0; i < 10; i++) {
+ const uint8_t *sigma = blake2s_sigma[i];
+
+ BLAKE2S_G(v0, v4, v8, v12, m[sigma[ 0]], m[sigma[ 1]]);
+ BLAKE2S_G(v1, v5, v9, v13, m[sigma[ 2]], m[sigma[ 3]]);
+ BLAKE2S_G(v2, v6, v10, v14, m[sigma[ 4]], m[sigma[ 5]]);
+ BLAKE2S_G(v3, v7, v11, v15, m[sigma[ 6]], m[sigma[ 7]]);
+ BLAKE2S_G(v0, v5, v10, v15, m[sigma[ 8]], m[sigma[ 9]]);
+ BLAKE2S_G(v1, v6, v11, v12, m[sigma[10]], m[sigma[11]]);
+ BLAKE2S_G(v2, v7, v8, v13, m[sigma[12]], m[sigma[13]]);
+ BLAKE2S_G(v3, v4, v9, v14, m[sigma[14]], m[sigma[15]]);
+ }
+
+ /* Update the state. */
+ h[0] ^= v0 ^ v8;
+ h[1] ^= v1 ^ v9;
+ h[2] ^= v2 ^ v10;
+ h[3] ^= v3 ^ v11;
+ h[4] ^= v4 ^ v12;
+ h[5] ^= v5 ^ v13;
+ h[6] ^= v6 ^ v14;
+ h[7] ^= v7 ^ v15;
+
+ (void)explicit_memset(m, 0, sizeof m);
+}
+
+void
+blake2s_init(struct blake2s *B, size_t dlen, const void *key, size_t keylen)
+{
+ uint32_t param0;
+ unsigned i;
+
+ assert(0 < dlen);
+ assert(dlen <= 32);
+ assert(keylen <= 32);
+
+ /* Record the digest length. */
+ B->dlen = dlen;
+
+ /* Initialize the buffer. */
+ B->nb = 0;
+
+ /* Initialize the state. */
+ B->c = 0;
+ for (i = 0; i < 8; i++)
+ B->h[i] = blake2s_iv[i];
+
+ /*
+ * Set the parameters. We support only variable digest and key
+ * lengths: no tree hashing, no salt, no personalization.
+ */
+ param0 = 0;
+ param0 |= (uint32_t)dlen << 0;
+ param0 |= (uint32_t)keylen << 8;
+ param0 |= (uint32_t)1 << 16; /* tree fanout = 1 */
+ param0 |= (uint32_t)1 << 24; /* tree depth = 1 */
+ B->h[0] ^= param0;
+
+ /* If there's a key, compress it as the first message block. */
+ if (keylen) {
+ static const uint8_t zero_block[64];
+
+ blake2s_update(B, key, keylen);
+ blake2s_update(B, zero_block, 64 - keylen);
+ }
+}
+
+void
+blake2s_update(struct blake2s *B, const void *buf, size_t len)
+{
+ const uint8_t *p = buf;
+ size_t n = len;
+
+ /* Check the current state of the buffer. */
+ if (n <= 64u - B->nb) {
+ /* Can at most exactly fill the buffer. */
+ (void)memcpy(&B->b[B->nb], p, n);
+ B->nb += n;
+ return;
+ } else if (0 < B->nb) {
+ /* Can fill the buffer and go on. */
+ (void)memcpy(&B->b[B->nb], p, 64 - B->nb);
+ B->c += 64;
+ blake2s_compress(B->h, B->c, 0, B->b);
+ p += 64 - B->nb;
+ n -= 64 - B->nb;
+ }
+
+ /* At a block boundary. Compress straight from the input. */
+ while (64 < n) {
+ B->c += 64;
+ blake2s_compress(B->h, B->c, 0, p);
+ p += 64;
+ n -= 64;
+ }
+
+ /*
+ * Put whatever's left in the buffer. We may fill the buffer,
+ * but we can't compress in that case until we know whether we
+ * are compressing the last block or not.
+ */
+ (void)memcpy(B->b, p, n);
+ B->nb = n;
+}
+
+void
+blake2s_final(struct blake2s *B, void *digest)
+{
+ uint8_t *d = digest;
+ unsigned dlen = B->dlen;
+ unsigned i;
+
+ /* Pad with zeros, and do the last compression. */
+ B->c += B->nb;
+ for (i = B->nb; i < 64; i++)
+ B->b[i] = 0;
+ blake2s_compress(B->h, B->c, ~(uint32_t)0, B->b);
+
+ /* Reveal the first dlen/4 words of the state. */
+ for (i = 0; i < dlen/4; i++)
+ le32enc(d + 4*i, B->h[i]);
+ d += 4*i;
+ dlen -= 4*i;
+
+ /* If the caller wants a partial word, reveal that too. */
+ if (dlen) {
+ uint32_t hi = B->h[i];
+
+ do {
+ *d++ = hi;
+ hi >>= 8;
+ } while (--dlen);
+ }
+
+ /* Erase the state. */
+ (void)explicit_memset(B, 0, sizeof B);
+}
+
+void
+blake2s(void *digest, size_t dlen, const void *key, size_t keylen,
+ const void *in, size_t inlen)
+{
+ struct blake2s ctx;
+
+ blake2s_init(&ctx, dlen, key, keylen);
+ blake2s_update(&ctx, in, inlen);
+ blake2s_final(&ctx, digest);
+}
+
+static void
+blake2_selftest_prng(void *buf, size_t len, uint32_t seed)
+{
+ uint8_t *p = buf;
+ size_t n = len;
+ uint32_t t, a, b;
+
+ a = 0xdead4bad * seed;
+ b = 1;
+
+ while (n--) {
+ t = a + b;
+ *p++ = t >> 24;
+ a = b;
+ b = t;
+ }
+}
+
+int
+blake2s_selftest(void)
+{
+ const uint8_t d0[32] = {
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