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/* Copyright © 2023 Valve Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <string.h>
#include <inttypes.h>
#include "mesa-blake3.h"
#include "hex.h"
void _mesa_blake3_format(char *buf, const unsigned char *blake3)
{
mesa_bytes_to_hex(buf, blake3, BLAKE3_OUT_LEN);
}
void _mesa_blake3_hex_to_blake3(unsigned char *buf, const char *hex)
{
mesa_hex_to_bytes(buf, hex, BLAKE3_OUT_LEN);
}
void _mesa_blake3_compute(const void *data, size_t size, blake3_hash result)
{
struct mesa_blake3 ctx;
_mesa_blake3_init(&ctx);
_mesa_blake3_update(&ctx, data, size);
_mesa_blake3_final(&ctx, result);
}
static void
blake3_to_uint32(const blake3_hash blake3,
uint32_t out[BLAKE3_OUT_LEN32])
{
memset(out, 0, BLAKE3_OUT_LEN);
for (unsigned i = 0; i < BLAKE3_OUT_LEN; i++)
out[i / 4] |= (uint32_t)blake3[i] << ((i % 4) * 8);
}
static void
blake3_from_uint32(blake3_hash blake3, uint32_t in[BLAKE3_OUT_LEN32])
{
for (unsigned i = 0; i < BLAKE3_OUT_LEN; i++)
blake3[i] = (in[i / 4] >> ((i % 4) * 8)) & 0xff;
}
void
_mesa_blake3_print(FILE *f, const blake3_hash blake3)
{
uint32_t u32[BLAKE3_OUT_LEN32];
blake3_to_uint32(blake3, u32);
for (unsigned i = 0; i < BLAKE3_OUT_LEN32; i++) {
fprintf(f, i ? ", 0x%08" PRIx32 : "0x%08" PRIx32, u32[i]);
}
}
bool
_mesa_blake3_from_printed_string(blake3_hash blake3, const char *printed)
{
unsigned expected_len = BLAKE3_PRINTED_LEN;
if (strlen(printed) != expected_len)
return false;
uint32_t u32[BLAKE3_OUT_LEN32];
for (unsigned i = 0; i < BLAKE3_OUT_LEN32; i++) {
int ret = sscanf(printed, i == BLAKE3_OUT_LEN32 - 1 ? "0x%08" PRIx32 : "0x%08" PRIx32 ", ", &u32[i]);
if (ret != 1)
return false;
printed += 12;
}
blake3_from_uint32(blake3, u32);
return true;
}
bool
_mesa_printed_blake3_equal(const blake3_hash blake3,
const uint32_t printed_blake3[BLAKE3_OUT_LEN32])
{
uint32_t u32[BLAKE3_OUT_LEN32];
blake3_to_uint32(blake3, u32);
return memcmp(u32, printed_blake3, sizeof(u32)) == 0;
}
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