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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
505 lines
18 KiB
C
505 lines
18 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:4;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright The Mbed TLS Contributors │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/mbedtls/sha256.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/nexgen32e/nexgen32e.h"
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#include "libc/nexgen32e/sha.h"
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/str/str.h"
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#include "third_party/mbedtls/common.h"
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#include "third_party/mbedtls/endian.h"
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#include "third_party/mbedtls/error.h"
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#include "third_party/mbedtls/md.h"
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asm(".ident\t\"\\n\\n\
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Mbed TLS (Apache 2.0)\\n\
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Copyright ARM Limited\\n\
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Copyright Mbed TLS Contributors\"");
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asm(".include \"libc/disclaimer.inc\"");
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/**
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* @fileoverview FIPS-180-2 compliant SHA-256 implementation
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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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* @see http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
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*/
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#define SHA256_VALIDATE_RET(cond) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA256_BAD_INPUT_DATA )
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#define SHA256_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond )
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#if !defined(MBEDTLS_SHA256_ALT)
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/**
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* \brief This function clones the state of a SHA-256 context.
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*
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* \param dst The destination context. This must be initialized.
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* \param src The context to clone. This must be initialized.
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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 );
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SHA256_VALIDATE( src );
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*dst = *src;
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}
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int mbedtls_sha256_starts_224( mbedtls_sha256_context *ctx )
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{
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SHA256_VALIDATE_RET( ctx );
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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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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ctx->is224 = true;
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return( 0 );
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}
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int mbedtls_sha256_starts_256( mbedtls_sha256_context *ctx )
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{
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SHA256_VALIDATE_RET( ctx );
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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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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ctx->is224 = false;
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return( 0 );
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}
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/**
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* \brief This function starts a SHA-224 or SHA-256 checksum
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* calculation.
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*
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* \param ctx The context to use. This must be initialized.
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* \param is224 This determines which function to use. This must be
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* either \c 0 for SHA-256, or \c 1 for SHA-224.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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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 );
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SHA256_VALIDATE_RET( is224 == 0 || is224 == 1 );
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if( !is224 )
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return mbedtls_sha256_starts_256( ctx );
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else
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return mbedtls_sha256_starts_224( ctx );
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}
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#if !defined(MBEDTLS_SHA256_PROCESS_ALT)
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#define K kSha256
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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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local.W[t] = S1(local.W[(t) - 2]) + local.W[(t) - 7] + \
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S0(local.W[(t) - 15]) + local.W[(t) - 16] \
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)
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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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local.temp1 = (h) + S3(e) + F1((e),(f),(g)) + (K) + (x); \
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local.temp2 = S2(a) + F0((a),(b),(c)); \
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(d) += local.temp1; (h) = local.temp1 + local.temp2; \
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} while( 0 )
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/**
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* \brief This function processes a single data block within
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* the ongoing SHA-256 computation. This function is for
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* internal use only.
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*
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* \param ctx The SHA-256 context. This must be initialized.
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* \param data The buffer holding one block of data. This must
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* be a readable buffer of length \c 64 Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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*/
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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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struct
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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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} local;
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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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if( X86_HAVE( SHA ) &&
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X86_HAVE( SSE2 ) &&
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X86_HAVE( SSSE3 ) )
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{
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if( IsAsan() )
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__asan_verify( data, 64 );
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sha256_transform_ni( ctx->state, data, 1 );
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return( 0 );
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}
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if( X86_HAVE( BMI2 ) &&
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X86_HAVE( AVX ) &&
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X86_HAVE( AVX2 ) )
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{
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if( IsAsan() )
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__asan_verify( data, 64 );
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sha256_transform_rorx( ctx->state, data, 1 );
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return( 0 );
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}
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for( i = 0; i < 8; i++ )
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local.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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if( i < 16 )
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GET_UINT32_BE( local.W[i], data, 4 * i );
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else
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R( i );
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P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
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local.A[5], local.A[6], local.A[7], local.W[i], K[i] );
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local.temp1 = local.A[7]; local.A[7] = local.A[6];
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local.A[6] = local.A[5]; local.A[5] = local.A[4];
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local.A[4] = local.A[3]; local.A[3] = local.A[2];
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local.A[2] = local.A[1]; local.A[1] = local.A[0];
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local.A[0] = local.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( local.W[i], data, 4 * i );
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for( i = 0; i < 16; i += 8 ) {
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P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
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local.A[5], local.A[6], local.A[7], local.W[i+0], K[i+0] );
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P( local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
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local.A[4], local.A[5], local.A[6], local.W[i+1], K[i+1] );
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P( local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
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local.A[3], local.A[4], local.A[5], local.W[i+2], K[i+2] );
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P( local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
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local.A[2], local.A[3], local.A[4], local.W[i+3], K[i+3] );
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P( local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
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local.A[1], local.A[2], local.A[3], local.W[i+4], K[i+4] );
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P( local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
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local.A[0], local.A[1], local.A[2], local.W[i+5], K[i+5] );
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P( local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
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local.A[7], local.A[0], local.A[1], local.W[i+6], K[i+6] );
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P( local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
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local.A[6], local.A[7], local.A[0], local.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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P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
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local.A[5], local.A[6], local.A[7], R(i+0), K[i+0] );
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P( local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
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local.A[4], local.A[5], local.A[6], R(i+1), K[i+1] );
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P( local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
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local.A[3], local.A[4], local.A[5], R(i+2), K[i+2] );
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P( local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
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local.A[2], local.A[3], local.A[4], R(i+3), K[i+3] );
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P( local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
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local.A[1], local.A[2], local.A[3], R(i+4), K[i+4] );
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P( local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
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local.A[0], local.A[1], local.A[2], R(i+5), K[i+5] );
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P( local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
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local.A[7], local.A[0], local.A[1], R(i+6), K[i+6] );
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P( local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
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local.A[6], local.A[7], local.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] += local.A[i];
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/* Zeroise buffers and variables to clear sensitive data from memory. */
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mbedtls_platform_zeroize( &local, sizeof( local ) );
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return( 0 );
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}
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#endif /* !MBEDTLS_SHA256_PROCESS_ALT */
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/**
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* \brief This function feeds an input buffer into an ongoing
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* SHA-256 checksum calculation.
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*
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* \param ctx The SHA-256 context. This must be initialized
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* and have a hash operation started.
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* \param input The buffer holding the data. This must be a readable
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* buffer of length \p ilen Bytes.
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* \param ilen The length of the input data in Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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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 = MBEDTLS_ERR_THIS_CORRUPTION;
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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] += (uint32_t) ilen;
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ctx->total[0] &= 0xFFFFFFFF;
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if( ctx->total[0] < (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( (void *) (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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if( ilen >= 64 )
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{
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if( X86_HAVE( SHA ) &&
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X86_HAVE( SSE2 ) &&
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X86_HAVE( SSSE3 ) )
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{
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if( IsAsan() )
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__asan_verify( input, ilen );
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sha256_transform_ni( ctx->state, input, ilen / 64 );
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input += ROUNDDOWN( ilen, 64 );
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ilen -= ROUNDDOWN( ilen, 64 );
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}
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else if( X86_HAVE( BMI ) &&
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X86_HAVE( BMI2 ) &&
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X86_HAVE( AVX2 ) )
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{
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if( IsAsan() )
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__asan_verify( input, ilen );
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sha256_transform_rorx( ctx->state, input, ilen / 64 );
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input += ROUNDDOWN( ilen, 64 );
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ilen -= ROUNDDOWN( ilen, 64 );
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}
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else
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{
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do
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{
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if(( ret = mbedtls_internal_sha256_process( ctx, input ) ))
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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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while( ilen >= 64 );
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}
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}
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if( ilen > 0 )
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memcpy( (void *) (ctx->buffer + left), input, ilen );
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return( 0 );
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}
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/**
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* \brief This function finishes the SHA-256 operation, and writes
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* the result to the output buffer.
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*
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* \param ctx The SHA-256 context. This must be initialized
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* and have a hash operation started.
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* \param output The SHA-224 or SHA-256 checksum result.
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* This must be a writable buffer of length \c 32 Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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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 = MBEDTLS_ERR_THIS_CORRUPTION;
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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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mbedtls_platform_zeroize( ctx->buffer + used, 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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mbedtls_platform_zeroize( ctx->buffer + used, 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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mbedtls_platform_zeroize( ctx->buffer, 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 )
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| ( 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 );
|
|
}
|
|
|
|
#endif /* !MBEDTLS_SHA256_ALT */
|
|
|
|
/**
|
|
* \brief This function calculates the SHA-224 or SHA-256
|
|
* checksum of a buffer.
|
|
*
|
|
* The function allocates the context, performs the
|
|
* calculation, and frees the context.
|
|
*
|
|
* The SHA-256 result is calculated as
|
|
* output = SHA-256(input buffer).
|
|
*
|
|
* \param input The buffer holding the data. This must be a readable
|
|
* buffer of length \p ilen Bytes.
|
|
* \param ilen The length of the input data in Bytes.
|
|
* \param output The SHA-224 or SHA-256 checksum result. This must
|
|
* be a writable buffer of length \c 32 Bytes.
|
|
* \param is224 Determines which function to use. This must be
|
|
* either \c 0 for SHA-256, or \c 1 for SHA-224.
|
|
*/
|
|
int mbedtls_sha256_ret( const void *input,
|
|
size_t ilen,
|
|
unsigned char output[32],
|
|
int is224 )
|
|
{
|
|
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
|
|
mbedtls_sha256_context ctx;
|
|
|
|
SHA256_VALIDATE_RET( is224 == 0 || is224 == 1 );
|
|
SHA256_VALIDATE_RET( ilen == 0 || input != NULL );
|
|
SHA256_VALIDATE_RET( (unsigned char *)output != NULL );
|
|
|
|
mbedtls_sha256_init( &ctx );
|
|
|
|
if( ( ret = mbedtls_sha256_starts_ret( &ctx, is224 ) ) != 0 )
|
|
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 );
|
|
}
|
|
|
|
dontinstrument int mbedtls_sha256_ret_224( const void *input, size_t ilen, unsigned char *output )
|
|
{
|
|
return mbedtls_sha256_ret( input, ilen, output, true );
|
|
}
|
|
|
|
dontinstrument int mbedtls_sha256_ret_256( const void *input, size_t ilen, unsigned char *output )
|
|
{
|
|
return mbedtls_sha256_ret( input, ilen, output, false );
|
|
}
|
|
|
|
const mbedtls_md_info_t mbedtls_sha224_info = {
|
|
"SHA224",
|
|
MBEDTLS_MD_SHA224,
|
|
28,
|
|
64,
|
|
(void *)mbedtls_sha256_starts_224,
|
|
(void *)mbedtls_sha256_update_ret,
|
|
(void *)mbedtls_internal_sha256_process,
|
|
(void *)mbedtls_sha256_finish_ret,
|
|
mbedtls_sha256_ret_224,
|
|
};
|
|
|
|
const mbedtls_md_info_t mbedtls_sha256_info = {
|
|
"SHA256",
|
|
MBEDTLS_MD_SHA256,
|
|
32,
|
|
64,
|
|
(void *)mbedtls_sha256_starts_256,
|
|
(void *)mbedtls_sha256_update_ret,
|
|
(void *)mbedtls_internal_sha256_process,
|
|
(void *)mbedtls_sha256_finish_ret,
|
|
mbedtls_sha256_ret_256,
|
|
};
|