mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-02 13:03:28 +01:00
256 lines
7.9 KiB
C
256 lines
7.9 KiB
C
/*
|
|
* Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
/* Based on https://131002.net/siphash C reference implementation */
|
|
/*
|
|
SipHash reference C implementation
|
|
|
|
Copyright (c) 2012-2016 Jean-Philippe Aumasson
|
|
Copyright (c) 2012-2014 Daniel J. Bernstein
|
|
|
|
To the extent possible under law, the author(s) have dedicated all copyright
|
|
and related and neighboring rights to this software to the public domain
|
|
worldwide. This software is distributed without any warranty.
|
|
|
|
You should have received a copy of the CC0 Public Domain Dedication along
|
|
with this software. If not, see
|
|
<http://creativecommons.org/publicdomain/zero/1.0/>.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <openssl/crypto.h>
|
|
|
|
#include "crypto/siphash.h"
|
|
|
|
#define ROTL(x, b) (uint64_t)(((x) << (b)) | ((x) >> (64 - (b))))
|
|
|
|
#define U32TO8_LE(p, v) \
|
|
(p)[0] = (uint8_t)((v)); \
|
|
(p)[1] = (uint8_t)((v) >> 8); \
|
|
(p)[2] = (uint8_t)((v) >> 16); \
|
|
(p)[3] = (uint8_t)((v) >> 24);
|
|
|
|
#define U64TO8_LE(p, v) \
|
|
U32TO8_LE((p), (uint32_t)((v))); \
|
|
U32TO8_LE((p) + 4, (uint32_t)((v) >> 32));
|
|
|
|
#define U8TO64_LE(p) \
|
|
(((uint64_t)((p)[0])) | ((uint64_t)((p)[1]) << 8) | \
|
|
((uint64_t)((p)[2]) << 16) | ((uint64_t)((p)[3]) << 24) | \
|
|
((uint64_t)((p)[4]) << 32) | ((uint64_t)((p)[5]) << 40) | \
|
|
((uint64_t)((p)[6]) << 48) | ((uint64_t)((p)[7]) << 56))
|
|
|
|
#define SIPROUND \
|
|
do { \
|
|
v0 += v1; \
|
|
v1 = ROTL(v1, 13); \
|
|
v1 ^= v0; \
|
|
v0 = ROTL(v0, 32); \
|
|
v2 += v3; \
|
|
v3 = ROTL(v3, 16); \
|
|
v3 ^= v2; \
|
|
v0 += v3; \
|
|
v3 = ROTL(v3, 21); \
|
|
v3 ^= v0; \
|
|
v2 += v1; \
|
|
v1 = ROTL(v1, 17); \
|
|
v1 ^= v2; \
|
|
v2 = ROTL(v2, 32); \
|
|
} while (0)
|
|
|
|
size_t SipHash_ctx_size(void)
|
|
{
|
|
return sizeof(SIPHASH);
|
|
}
|
|
|
|
size_t SipHash_hash_size(SIPHASH *ctx)
|
|
{
|
|
return ctx->hash_size;
|
|
}
|
|
|
|
static size_t siphash_adjust_hash_size(size_t hash_size)
|
|
{
|
|
if (hash_size == 0)
|
|
hash_size = SIPHASH_MAX_DIGEST_SIZE;
|
|
return hash_size;
|
|
}
|
|
|
|
int SipHash_set_hash_size(SIPHASH *ctx, size_t hash_size)
|
|
{
|
|
hash_size = siphash_adjust_hash_size(hash_size);
|
|
if (hash_size != SIPHASH_MIN_DIGEST_SIZE
|
|
&& hash_size != SIPHASH_MAX_DIGEST_SIZE)
|
|
return 0;
|
|
|
|
/*
|
|
* It's possible that the key was set first. If the hash size changes,
|
|
* we need to adjust v1 (see SipHash_Init().
|
|
*/
|
|
|
|
/* Start by adjusting the stored size, to make things easier */
|
|
ctx->hash_size = siphash_adjust_hash_size(ctx->hash_size);
|
|
|
|
/* Now, adjust ctx->v1 if the old and the new size differ */
|
|
if ((size_t)ctx->hash_size != hash_size) {
|
|
ctx->v1 ^= 0xee;
|
|
ctx->hash_size = hash_size;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* hash_size = crounds = drounds = 0 means SipHash24 with 16-byte output */
|
|
int SipHash_Init(SIPHASH *ctx, const unsigned char *k, int crounds, int drounds)
|
|
{
|
|
uint64_t k0 = U8TO64_LE(k);
|
|
uint64_t k1 = U8TO64_LE(k + 8);
|
|
|
|
/* If the hash size wasn't set, i.e. is zero */
|
|
ctx->hash_size = siphash_adjust_hash_size(ctx->hash_size);
|
|
|
|
if (drounds == 0)
|
|
drounds = SIPHASH_D_ROUNDS;
|
|
if (crounds == 0)
|
|
crounds = SIPHASH_C_ROUNDS;
|
|
|
|
ctx->crounds = crounds;
|
|
ctx->drounds = drounds;
|
|
|
|
ctx->len = 0;
|
|
ctx->total_inlen = 0;
|
|
|
|
ctx->v0 = 0x736f6d6570736575ULL ^ k0;
|
|
ctx->v1 = 0x646f72616e646f6dULL ^ k1;
|
|
ctx->v2 = 0x6c7967656e657261ULL ^ k0;
|
|
ctx->v3 = 0x7465646279746573ULL ^ k1;
|
|
|
|
if (ctx->hash_size == SIPHASH_MAX_DIGEST_SIZE)
|
|
ctx->v1 ^= 0xee;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void SipHash_Update(SIPHASH *ctx, const unsigned char *in, size_t inlen)
|
|
{
|
|
uint64_t m;
|
|
const uint8_t *end;
|
|
int left;
|
|
unsigned int i;
|
|
uint64_t v0 = ctx->v0;
|
|
uint64_t v1 = ctx->v1;
|
|
uint64_t v2 = ctx->v2;
|
|
uint64_t v3 = ctx->v3;
|
|
|
|
ctx->total_inlen += inlen;
|
|
|
|
if (ctx->len) {
|
|
/* deal with leavings */
|
|
size_t available = SIPHASH_BLOCK_SIZE - ctx->len;
|
|
|
|
/* not enough to fill leavings */
|
|
if (inlen < available) {
|
|
memcpy(&ctx->leavings[ctx->len], in, inlen);
|
|
ctx->len += inlen;
|
|
return;
|
|
}
|
|
|
|
/* copy data into leavings and reduce input */
|
|
memcpy(&ctx->leavings[ctx->len], in, available);
|
|
inlen -= available;
|
|
in += available;
|
|
|
|
/* process leavings */
|
|
m = U8TO64_LE(ctx->leavings);
|
|
v3 ^= m;
|
|
for (i = 0; i < ctx->crounds; ++i)
|
|
SIPROUND;
|
|
v0 ^= m;
|
|
}
|
|
left = inlen & (SIPHASH_BLOCK_SIZE-1); /* gets put into leavings */
|
|
end = in + inlen - left;
|
|
|
|
for (; in != end; in += 8) {
|
|
m = U8TO64_LE(in);
|
|
v3 ^= m;
|
|
for (i = 0; i < ctx->crounds; ++i)
|
|
SIPROUND;
|
|
v0 ^= m;
|
|
}
|
|
|
|
/* save leavings and other ctx */
|
|
if (left)
|
|
memcpy(ctx->leavings, end, left);
|
|
ctx->len = left;
|
|
|
|
ctx->v0 = v0;
|
|
ctx->v1 = v1;
|
|
ctx->v2 = v2;
|
|
ctx->v3 = v3;
|
|
}
|
|
|
|
int SipHash_Final(SIPHASH *ctx, unsigned char *out, size_t outlen)
|
|
{
|
|
/* finalize hash */
|
|
unsigned int i;
|
|
uint64_t b = ctx->total_inlen << 56;
|
|
uint64_t v0 = ctx->v0;
|
|
uint64_t v1 = ctx->v1;
|
|
uint64_t v2 = ctx->v2;
|
|
uint64_t v3 = ctx->v3;
|
|
|
|
if (ctx->crounds == 0 || outlen == 0 || outlen != (size_t)ctx->hash_size)
|
|
return 0;
|
|
|
|
switch (ctx->len) {
|
|
case 7:
|
|
b |= ((uint64_t)ctx->leavings[6]) << 48;
|
|
/* fall thru */
|
|
case 6:
|
|
b |= ((uint64_t)ctx->leavings[5]) << 40;
|
|
/* fall thru */
|
|
case 5:
|
|
b |= ((uint64_t)ctx->leavings[4]) << 32;
|
|
/* fall thru */
|
|
case 4:
|
|
b |= ((uint64_t)ctx->leavings[3]) << 24;
|
|
/* fall thru */
|
|
case 3:
|
|
b |= ((uint64_t)ctx->leavings[2]) << 16;
|
|
/* fall thru */
|
|
case 2:
|
|
b |= ((uint64_t)ctx->leavings[1]) << 8;
|
|
/* fall thru */
|
|
case 1:
|
|
b |= ((uint64_t)ctx->leavings[0]);
|
|
case 0:
|
|
break;
|
|
}
|
|
|
|
v3 ^= b;
|
|
for (i = 0; i < ctx->crounds; ++i)
|
|
SIPROUND;
|
|
v0 ^= b;
|
|
if (ctx->hash_size == SIPHASH_MAX_DIGEST_SIZE)
|
|
v2 ^= 0xee;
|
|
else
|
|
v2 ^= 0xff;
|
|
for (i = 0; i < ctx->drounds; ++i)
|
|
SIPROUND;
|
|
b = v0 ^ v1 ^ v2 ^ v3;
|
|
U64TO8_LE(out, b);
|
|
if (ctx->hash_size == SIPHASH_MIN_DIGEST_SIZE)
|
|
return 1;
|
|
v1 ^= 0xdd;
|
|
for (i = 0; i < ctx->drounds; ++i)
|
|
SIPROUND;
|
|
b = v0 ^ v1 ^ v2 ^ v3;
|
|
U64TO8_LE(out + 8, b);
|
|
return 1;
|
|
}
|