mirror of
https://github.com/RPCSX/rpcsx.git
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496 lines
12 KiB
C++
496 lines
12 KiB
C++
/*
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* FIPS-180-2 compliant SHA-256 implementation
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: GPL-2.0
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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/*
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* The SHA-256 Secure Hash Standard was published by NIST in 2002.
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*
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* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
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*/
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#include "sha256.h"
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#include "utils.h"
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#include <string.h>
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#if defined(MBEDTLS_SELF_TEST)
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_printf printf
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif /* MBEDTLS_PLATFORM_C */
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#endif /* MBEDTLS_SELF_TEST */
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#define SHA256_VALIDATE_RET(cond)
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#define SHA256_VALIDATE(cond)
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#if !defined(MBEDTLS_SHA256_ALT)
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/*
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* 32-bit integer manipulation macros (big endian)
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*/
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#ifndef GET_UINT32_BE
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#define GET_UINT32_BE(n, b, i) \
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do \
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{ \
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(n) = (static_cast<uint32_t>((b)[(i)]) << 24) | (static_cast<uint32_t>((b)[(i) + 1]) << 16) | (static_cast<uint32_t>((b)[(i) + 2]) << 8) | (static_cast<uint32_t>((b)[(i) + 3])); \
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} while (0)
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#endif
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#ifndef PUT_UINT32_BE
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#define PUT_UINT32_BE(n, b, i) \
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do \
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{ \
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(b)[(i)] = static_cast<unsigned char>((n) >> 24); \
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(b)[(i) + 1] = static_cast<unsigned char>((n) >> 16); \
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(b)[(i) + 2] = static_cast<unsigned char>((n) >> 8); \
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(b)[(i) + 3] = static_cast<unsigned char>((n)); \
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} while (0)
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#endif
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void mbedtls_sha256_init(mbedtls_sha256_context* ctx)
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{
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SHA256_VALIDATE(ctx != NULL);
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memset(ctx, 0, sizeof(mbedtls_sha256_context));
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}
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void mbedtls_sha256_free(mbedtls_sha256_context* ctx)
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{
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if (ctx == NULL)
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return;
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mbedtls_zeroize(ctx, sizeof(mbedtls_sha256_context));
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}
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void mbedtls_sha256_clone(mbedtls_sha256_context* dst,
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const mbedtls_sha256_context* src)
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{
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SHA256_VALIDATE(dst != NULL);
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SHA256_VALIDATE(src != NULL);
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*dst = *src;
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}
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/*
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* SHA-256 context setup
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*/
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int mbedtls_sha256_starts_ret(mbedtls_sha256_context* ctx, int is224)
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{
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SHA256_VALIDATE_RET(ctx != NULL);
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SHA256_VALIDATE_RET(is224 == 0 || is224 == 1);
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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if (is224 == 0)
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{
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/* SHA-256 */
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ctx->state[0] = 0x6A09E667;
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ctx->state[1] = 0xBB67AE85;
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ctx->state[2] = 0x3C6EF372;
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ctx->state[3] = 0xA54FF53A;
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ctx->state[4] = 0x510E527F;
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ctx->state[5] = 0x9B05688C;
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ctx->state[6] = 0x1F83D9AB;
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ctx->state[7] = 0x5BE0CD19;
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}
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else
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{
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/* SHA-224 */
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ctx->state[0] = 0xC1059ED8;
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ctx->state[1] = 0x367CD507;
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ctx->state[2] = 0x3070DD17;
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ctx->state[3] = 0xF70E5939;
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ctx->state[4] = 0xFFC00B31;
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ctx->state[5] = 0x68581511;
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ctx->state[6] = 0x64F98FA7;
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ctx->state[7] = 0xBEFA4FA4;
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}
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ctx->is224 = is224;
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return (0);
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha256_starts(mbedtls_sha256_context* ctx,
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int is224)
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{
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mbedtls_sha256_starts_ret(ctx, is224);
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}
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#endif
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#if !defined(MBEDTLS_SHA256_PROCESS_ALT)
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static const uint32_t K[] =
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{
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0x428A2F98,
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0x71374491,
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0xB5C0FBCF,
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0xE9B5DBA5,
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0x3956C25B,
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0x59F111F1,
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0x923F82A4,
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0xAB1C5ED5,
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0xD807AA98,
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0x12835B01,
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0x243185BE,
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0x550C7DC3,
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0x72BE5D74,
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0x80DEB1FE,
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0x9BDC06A7,
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0xC19BF174,
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0xE49B69C1,
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0xEFBE4786,
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0x0FC19DC6,
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0x240CA1CC,
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0x2DE92C6F,
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0x4A7484AA,
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0x5CB0A9DC,
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0x76F988DA,
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0x983E5152,
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0xA831C66D,
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0xB00327C8,
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0xBF597FC7,
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0xC6E00BF3,
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0xD5A79147,
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0x06CA6351,
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0x14292967,
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0x27B70A85,
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0x2E1B2138,
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0x4D2C6DFC,
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0x53380D13,
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0x650A7354,
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0x766A0ABB,
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0x81C2C92E,
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0x92722C85,
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0xA2BFE8A1,
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0xA81A664B,
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0xC24B8B70,
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0xC76C51A3,
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0xD192E819,
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0xD6990624,
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0xF40E3585,
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0x106AA070,
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0x19A4C116,
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0x1E376C08,
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0x2748774C,
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0x34B0BCB5,
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0x391C0CB3,
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0x4ED8AA4A,
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0x5B9CCA4F,
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0x682E6FF3,
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0x748F82EE,
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0x78A5636F,
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0x84C87814,
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0x8CC70208,
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0x90BEFFFA,
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0xA4506CEB,
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0xBEF9A3F7,
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0xC67178F2,
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};
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#define SHR(x, n) (((x) & 0xFFFFFFFF) >> (n))
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#define ROTR(x, n) (SHR(x, n) | ((x) << (32 - (n))))
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#define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
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#define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
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#define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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#define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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#define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
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#define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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#define R(t) \
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( \
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W[t] = S1(W[(t) - 2]) + W[(t) - 7] + \
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S0(W[(t) - 15]) + W[(t) - 16])
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#define P(a, b, c, d, e, f, g, h, x, K) \
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do \
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{ \
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temp1 = (h) + S3(e) + F1((e), (f), (g)) + (K) + (x); \
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temp2 = S2(a) + F0((a), (b), (c)); \
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(d) += temp1; \
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(h) = temp1 + temp2; \
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} while (0)
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int mbedtls_internal_sha256_process(mbedtls_sha256_context* ctx,
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const unsigned char data[64])
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{
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uint32_t temp1, temp2, W[64];
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uint32_t A[8];
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unsigned int i;
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SHA256_VALIDATE_RET(ctx != NULL);
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SHA256_VALIDATE_RET((const unsigned char*)data != NULL);
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for (i = 0; i < 8; i++)
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A[i] = ctx->state[i];
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#if defined(MBEDTLS_SHA256_SMALLER)
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for (i = 0; i < 64; i++)
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{
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if (i < 16)
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GET_UINT32_BE(W[i], data, 4 * i);
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else
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R(i);
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P(A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i]);
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temp1 = A[7];
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A[7] = A[6];
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A[6] = A[5];
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A[5] = A[4];
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A[4] = A[3];
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A[3] = A[2];
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A[2] = A[1];
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A[1] = A[0];
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A[0] = temp1;
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}
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#else /* MBEDTLS_SHA256_SMALLER */
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for (i = 0; i < 16; i++)
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GET_UINT32_BE(W[i], data, 4 * i);
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for (i = 0; i < 16; i += 8)
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{
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P(A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i + 0], K[i + 0]);
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P(A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i + 1], K[i + 1]);
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P(A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i + 2], K[i + 2]);
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P(A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i + 3], K[i + 3]);
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P(A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i + 4], K[i + 4]);
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P(A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i + 5], K[i + 5]);
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P(A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i + 6], K[i + 6]);
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P(A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i + 7], K[i + 7]);
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}
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for (i = 16; i < 64; i += 8)
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{
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P(A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i + 0), K[i + 0]);
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P(A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i + 1), K[i + 1]);
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P(A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i + 2), K[i + 2]);
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P(A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i + 3), K[i + 3]);
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P(A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i + 4), K[i + 4]);
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P(A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i + 5), K[i + 5]);
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P(A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i + 6), K[i + 6]);
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P(A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i + 7), K[i + 7]);
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}
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#endif /* MBEDTLS_SHA256_SMALLER */
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for (i = 0; i < 8; i++)
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ctx->state[i] += A[i];
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return (0);
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha256_process(mbedtls_sha256_context* ctx,
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const unsigned char data[64])
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{
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mbedtls_internal_sha256_process(ctx, data);
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}
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#endif
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#endif /* !MBEDTLS_SHA256_PROCESS_ALT */
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/*
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* SHA-256 process buffer
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*/
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int mbedtls_sha256_update_ret(mbedtls_sha256_context* ctx,
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const unsigned char* input,
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size_t ilen)
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{
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int ret;
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size_t fill;
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uint32_t left;
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SHA256_VALIDATE_RET(ctx != NULL);
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SHA256_VALIDATE_RET(ilen == 0 || input != NULL);
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if (ilen == 0)
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return (0);
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left = ctx->total[0] & 0x3F;
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fill = 64 - left;
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ctx->total[0] += static_cast<uint32_t>(ilen);
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ctx->total[0] &= 0xFFFFFFFF;
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if (ctx->total[0] < static_cast<uint32_t>(ilen))
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ctx->total[1]++;
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if (left && ilen >= fill)
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{
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memcpy(ctx->buffer + left, input, fill);
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if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0)
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return (ret);
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input += fill;
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ilen -= fill;
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left = 0;
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}
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while (ilen >= 64)
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{
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if ((ret = mbedtls_internal_sha256_process(ctx, input)) != 0)
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return (ret);
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input += 64;
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ilen -= 64;
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}
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if (ilen > 0)
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memcpy(ctx->buffer + left, input, ilen);
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return (0);
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha256_update(mbedtls_sha256_context* ctx,
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const unsigned char* input,
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size_t ilen)
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{
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mbedtls_sha256_update_ret(ctx, input, ilen);
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}
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#endif
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/*
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* SHA-256 final digest
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*/
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int mbedtls_sha256_finish_ret(mbedtls_sha256_context* ctx,
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unsigned char output[32])
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{
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int ret;
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uint32_t used;
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uint32_t high, low;
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SHA256_VALIDATE_RET(ctx != NULL);
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SHA256_VALIDATE_RET((unsigned char*)output != NULL);
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/*
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* Add padding: 0x80 then 0x00 until 8 bytes remain for the length
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*/
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used = ctx->total[0] & 0x3F;
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ctx->buffer[used++] = 0x80;
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if (used <= 56)
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{
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/* Enough room for padding + length in current block */
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memset(ctx->buffer + used, 0, 56 - used);
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}
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else
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{
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/* We'll need an extra block */
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memset(ctx->buffer + used, 0, 64 - used);
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if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0)
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return (ret);
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memset(ctx->buffer, 0, 56);
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}
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/*
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* Add message length
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*/
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high = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
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low = (ctx->total[0] << 3);
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PUT_UINT32_BE(high, ctx->buffer, 56);
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PUT_UINT32_BE(low, ctx->buffer, 60);
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if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0)
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return (ret);
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/*
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* Output final state
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*/
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PUT_UINT32_BE(ctx->state[0], output, 0);
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PUT_UINT32_BE(ctx->state[1], output, 4);
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PUT_UINT32_BE(ctx->state[2], output, 8);
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PUT_UINT32_BE(ctx->state[3], output, 12);
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PUT_UINT32_BE(ctx->state[4], output, 16);
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PUT_UINT32_BE(ctx->state[5], output, 20);
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PUT_UINT32_BE(ctx->state[6], output, 24);
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if (ctx->is224 == 0)
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PUT_UINT32_BE(ctx->state[7], output, 28);
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return (0);
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha256_finish(mbedtls_sha256_context* ctx,
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unsigned char output[32])
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{
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mbedtls_sha256_finish_ret(ctx, output);
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}
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#endif
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#endif /* !MBEDTLS_SHA256_ALT */
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/*
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* output = SHA-256( input buffer )
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*/
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int mbedtls_sha256_ret(const unsigned char* input,
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size_t ilen,
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unsigned char output[32],
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int is224)
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{
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int ret;
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mbedtls_sha256_context ctx;
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SHA256_VALIDATE_RET(is224 == 0 || is224 == 1);
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SHA256_VALIDATE_RET(ilen == 0 || input != NULL);
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SHA256_VALIDATE_RET((unsigned char*)output != NULL);
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mbedtls_sha256_init(&ctx);
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if ((ret = mbedtls_sha256_starts_ret(&ctx, is224)) != 0)
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goto exit;
|
|
|
|
if ((ret = mbedtls_sha256_update_ret(&ctx, input, ilen)) != 0)
|
|
goto exit;
|
|
|
|
if ((ret = mbedtls_sha256_finish_ret(&ctx, output)) != 0)
|
|
goto exit;
|
|
|
|
exit:
|
|
mbedtls_sha256_free(&ctx);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
|
|
void mbedtls_sha256(const unsigned char* input,
|
|
size_t ilen,
|
|
unsigned char output[32],
|
|
int is224)
|
|
{
|
|
mbedtls_sha256_ret(input, ilen, output, is224);
|
|
}
|
|
#endif
|