/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:4;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright The Mbed TLS Contributors │
│ │
│ Licensed under the Apache License, Version 2.0 (the "License"); │
│ you may not use this file except in compliance with the License. │
│ You may obtain a copy of the License at │
│ │
│ http://www.apache.org/licenses/LICENSE-2.0 │
│ │
│ Unless required by applicable law or agreed to in writing, software │
│ distributed under the License is distributed on an "AS IS" BASIS, │
│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
│ See the License for the specific language governing permissions and │
│ limitations under the License. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/asan.internal.h"
#include "libc/literal.h"
#include "libc/macros.internal.h"
#include "libc/nexgen32e/nexgen32e.h"
#include "libc/nexgen32e/x86feature.h"
#include "libc/str/str.h"
#include "third_party/mbedtls/chk.h"
#include "third_party/mbedtls/common.h"
#include "third_party/mbedtls/endian.h"
#include "third_party/mbedtls/error.h"
#include "third_party/mbedtls/md.h"
#include "third_party/mbedtls/platform.h"
#include "third_party/mbedtls/sha512.h"
asm(".ident\t\"\\n\\n\
Mbed TLS (Apache 2.0)\\n\
Copyright ARM Limited\\n\
Copyright Mbed TLS Contributors\"");
asm(".include \"libc/disclaimer.inc\"");
/* clang-format off */
/**
* @fileoverview FIPS-180-2 compliant SHA-384/512 implementation
*
* The SHA-512 Secure Hash Standard was published by NIST in 2002.
*
* @see http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
*/
void sha512_transform_rorx(mbedtls_sha512_context *, const uint8_t *, int);
#if defined(MBEDTLS_SHA512_C)
#define SHA512_VALIDATE_RET(cond) \
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA512_BAD_INPUT_DATA )
#define SHA512_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond )
#if !defined(MBEDTLS_SHA512_ALT)
#define sha512_put_uint64_be PUT_UINT64_BE
/**
* \brief This function clones the state of a SHA-512 context.
*
* \param dst The destination context. This must be initialized.
* \param src The context to clone. This must be initialized.
*/
void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
const mbedtls_sha512_context *src )
{
SHA512_VALIDATE( dst );
SHA512_VALIDATE( src );
*dst = *src;
}
int mbedtls_sha512_starts_384( mbedtls_sha512_context *ctx )
{
SHA512_VALIDATE_RET( ctx );
ctx->total[0] = 0;
ctx->total[1] = 0;
ctx->state[0] = 0xCBBB9D5DC1059ED8;
ctx->state[1] = 0x629A292A367CD507;
ctx->state[2] = 0x9159015A3070DD17;
ctx->state[3] = 0x152FECD8F70E5939;
ctx->state[4] = 0x67332667FFC00B31;
ctx->state[5] = 0x8EB44A8768581511;
ctx->state[6] = 0xDB0C2E0D64F98FA7;
ctx->state[7] = 0x47B5481DBEFA4FA4;
ctx->is384 = true;
return( 0 );
}
int mbedtls_sha512_starts_512( mbedtls_sha512_context *ctx )
{
SHA512_VALIDATE_RET( ctx );
ctx->total[0] = 0;
ctx->total[1] = 0;
ctx->state[0] = 0x6A09E667F3BCC908;
ctx->state[1] = 0xBB67AE8584CAA73B;
ctx->state[2] = 0x3C6EF372FE94F82B;
ctx->state[3] = 0xA54FF53A5F1D36F1;
ctx->state[4] = 0x510E527FADE682D1;
ctx->state[5] = 0x9B05688C2B3E6C1F;
ctx->state[6] = 0x1F83D9ABFB41BD6B;
ctx->state[7] = 0x5BE0CD19137E2179;
ctx->is384 = false;
return( 0 );
}
/**
* \brief This function starts a SHA-384 or SHA-512 checksum
* calculation.
*
* \param ctx The SHA-512 context to use. This must be initialized.
* \param is384 Determines which function to use. This must be
* either \c 0 for SHA-512, or \c 1 for SHA-384.
*
* \note When \c MBEDTLS_SHA512_NO_SHA384 is defined, \p is384 must
* be \c 0, or the function will return
* #MBEDTLS_ERR_SHA512_BAD_INPUT_DATA.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 )
{
SHA512_VALIDATE_RET( ctx );
SHA512_VALIDATE_RET( is384 == 0 || is384 == 1 );
if( !is384 )
return mbedtls_sha512_starts_512( ctx );
else
return mbedtls_sha512_starts_384( ctx );
}
#if !defined(MBEDTLS_SHA512_PROCESS_ALT)
#define SHR(x,n) ((x) >> (n))
#define ROR(x,n) (SHR((x),(n)) | ((x) << (64 - (n))))
#define S0(x) (ROR(x, 1) ^ ROR(x, 8) ^ SHR(x, 7))
#define S1(x) (ROR(x,19) ^ ROR(x,61) ^ SHR(x, 6))
#define S2(x) (ROR(x,28) ^ ROR(x,34) ^ ROR(x,39))
#define S3(x) (ROR(x,14) ^ ROR(x,18) ^ ROR(x,41))
#define F0(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
#define F1(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
#define P(a,b,c,d,e,f,g,h,x,k) \
do \
{ \
local.temp1 = (h) + S3(e) + F1((e),(f),(g)) + (k) + (x); \
local.temp2 = S2(a) + F0((a),(b),(c)); \
(d) += local.temp1; (h) = local.temp1 + local.temp2; \
} while( 0 )
/**
* \brief This function processes a single data block within
* the ongoing SHA-512 computation.
* This function is for internal use only.
*
* \param ctx The SHA-512 context. This must be initialized.
* \param data The buffer holding one block of data. This
* must be a readable buffer of length \c 128 Bytes.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
const unsigned char data[128] )
{
int i;
struct
{
uint64_t temp1, temp2, W[80];
uint64_t A[8];
} local;
SHA512_VALIDATE_RET( ctx != NULL );
SHA512_VALIDATE_RET( (const unsigned char *)data != NULL );
if( !IsTiny() && X86_HAVE(AVX2) )
{
if (IsAsan())
__asan_verify(data, 128);
sha512_transform_rorx(ctx, data, 1);
return 0;
}
for( i = 0; i < 8; i++ )
local.A[i] = ctx->state[i];
#if defined(MBEDTLS_SHA512_SMALLER)
for( i = 0; i < 80; i++ )
{
if( i < 16 )
{
GET_UINT64_BE( local.W[i], data, i << 3 );
}
else
{
local.W[i] = S1(local.W[i - 2]) + local.W[i - 7] +
S0(local.W[i - 15]) + local.W[i - 16];
}
P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
local.A[5], local.A[6], local.A[7], local.W[i], kSha512[i] );
local.temp1 = local.A[7];
local.A[7] = local.A[6];
local.A[6] = local.A[5];
local.A[5] = local.A[4];
local.A[4] = local.A[3];
local.A[3] = local.A[2];
local.A[2] = local.A[1];
local.A[1] = local.A[0];
local.A[0] = local.temp1;
}
#else /* MBEDTLS_SHA512_SMALLER */
for( i = 0; i < 16; i++ )
{
GET_UINT64_BE( local.W[i], data, i << 3 );
}
for( ; i < 80; i++ )
{
local.W[i] = S1(local.W[i - 2]) + local.W[i - 7] +
S0(local.W[i - 15]) + local.W[i - 16];
}
i = 0;
do
{
P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
local.A[5], local.A[6], local.A[7], local.W[i], kSha512[i] ); i++;
P( local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
local.A[4], local.A[5], local.A[6], local.W[i], kSha512[i] ); i++;
P( local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
local.A[3], local.A[4], local.A[5], local.W[i], kSha512[i] ); i++;
P( local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
local.A[2], local.A[3], local.A[4], local.W[i], kSha512[i] ); i++;
P( local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
local.A[1], local.A[2], local.A[3], local.W[i], kSha512[i] ); i++;
P( local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
local.A[0], local.A[1], local.A[2], local.W[i], kSha512[i] ); i++;
P( local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
local.A[7], local.A[0], local.A[1], local.W[i], kSha512[i] ); i++;
P( local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
local.A[6], local.A[7], local.A[0], local.W[i], kSha512[i] ); i++;
}
while( i < 80 );
#endif /* MBEDTLS_SHA512_SMALLER */
for( i = 0; i < 8; i++ )
ctx->state[i] += local.A[i];
/* Zeroise buffers and variables to clear sensitive data from memory. */
mbedtls_platform_zeroize( &local, sizeof( local ) );
return( 0 );
}
#endif /* !MBEDTLS_SHA512_PROCESS_ALT */
/**
* \brief This function feeds an input buffer into an ongoing
* SHA-512 checksum calculation.
*
* \param ctx The SHA-512 context. This must be initialized
* and have a hash operation started.
* \param input The buffer holding the input data. This must
* be a readable buffer of length \p ilen Bytes.
* \param ilen The length of the input data in Bytes.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
const unsigned char *input,
size_t ilen )
{
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
size_t fill;
unsigned int left;
SHA512_VALIDATE_RET( ctx != NULL );
SHA512_VALIDATE_RET( ilen == 0 || input != NULL );
if( ilen == 0 )
return( 0 );
left = (unsigned int) (ctx->total[0] & 0x7F);
fill = 128 - left;
ctx->total[0] += (uint64_t) ilen;
if( ctx->total[0] < (uint64_t) ilen )
ctx->total[1]++;
if( left && ilen >= fill )
{
memcpy( (void *) (ctx->buffer + left), input, fill );
if( ( ret = mbedtls_internal_sha512_process( ctx, ctx->buffer ) ) != 0 )
return( ret );
input += fill;
ilen -= fill;
left = 0;
}
if (!IsTiny() && ilen >= 128 && X86_HAVE(AVX2)) {
if (IsAsan()) __asan_verify(input, ilen / 128 * 128);
sha512_transform_rorx(ctx, input, ilen / 128);
input += ROUNDDOWN(ilen, 128);
ilen -= ROUNDDOWN(ilen, 128);
}
while( ilen >= 128 )
{
if( ( ret = mbedtls_internal_sha512_process( ctx, input ) ) != 0 )
return( ret );
input += 128;
ilen -= 128;
}
if( ilen > 0 )
memcpy( (void *) (ctx->buffer + left), input, ilen );
return( 0 );
}
/**
* \brief This function finishes the SHA-512 operation, and writes
* the result to the output buffer.
*
* \param ctx The SHA-512 context. This must be initialized
* and have a hash operation started.
* \param output The SHA-384 or SHA-512 checksum result.
* This must be a writable buffer of length \c 64 Bytes.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
unsigned char output[64] )
{
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
unsigned used;
uint64_t high, low;
SHA512_VALIDATE_RET( ctx != NULL );
SHA512_VALIDATE_RET( (unsigned char *)output != NULL );
/*
* Add padding: 0x80 then 0x00 until 16 bytes remain for the length
*/
used = ctx->total[0] & 0x7F;
ctx->buffer[used++] = 0x80;
if( used <= 112 )
{
/* Enough room for padding + length in current block */
mbedtls_platform_zeroize( ctx->buffer + used, 112 - used );
}
else
{
/* We'll need an extra block */
mbedtls_platform_zeroize( ctx->buffer + used, 128 - used );
if( ( ret = mbedtls_internal_sha512_process( ctx, ctx->buffer ) ) != 0 )
return( ret );
mbedtls_platform_zeroize( ctx->buffer, 112 );
}
/*
* Add message length
*/
high = ( ctx->total[0] >> 61 )
| ( ctx->total[1] << 3 );
low = ( ctx->total[0] << 3 );
sha512_put_uint64_be( high, ctx->buffer, 112 );
sha512_put_uint64_be( low, ctx->buffer, 120 );
if( ( ret = mbedtls_internal_sha512_process( ctx, ctx->buffer ) ) != 0 )
return( ret );
/*
* Output final state
*/
sha512_put_uint64_be( ctx->state[0], output, 0 );
sha512_put_uint64_be( ctx->state[1], output, 8 );
sha512_put_uint64_be( ctx->state[2], output, 16 );
sha512_put_uint64_be( ctx->state[3], output, 24 );
sha512_put_uint64_be( ctx->state[4], output, 32 );
sha512_put_uint64_be( ctx->state[5], output, 40 );
#if !defined(MBEDTLS_SHA512_NO_SHA384)
if( ctx->is384 == 0 )
#endif
{
sha512_put_uint64_be( ctx->state[6], output, 48 );
sha512_put_uint64_be( ctx->state[7], output, 56 );
}
return( 0 );
}
#endif /* !MBEDTLS_SHA512_ALT */
/**
* \brief This function calculates the SHA-512 or SHA-384
* checksum of a buffer.
*
* The function allocates the context, performs the
* calculation, and frees the context.
*
* The SHA-512 result is calculated as
* output = SHA-512(input buffer).
*
* \param input The buffer holding the input 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-384 or SHA-512 checksum result.
* This must be a writable buffer of length \c 64 Bytes.
* \param is384 Determines which function to use. This must be either
* \c 0 for SHA-512, or \c 1 for SHA-384.
*
* \note When \c MBEDTLS_SHA512_NO_SHA384 is defined, \p is384 must
* be \c 0, or the function will return
* #MBEDTLS_ERR_SHA512_BAD_INPUT_DATA.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha512_ret( const void *input,
size_t ilen,
unsigned char output[64],
int is384 )
{
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
mbedtls_sha512_context ctx;
#if !defined(MBEDTLS_SHA512_NO_SHA384)
SHA512_VALIDATE_RET( is384 == 0 || is384 == 1 );
#else
SHA512_VALIDATE_RET( is384 == 0 );
#endif
SHA512_VALIDATE_RET( ilen == 0 || input );
SHA512_VALIDATE_RET( (unsigned char *)output );
mbedtls_sha512_init( &ctx );
MBEDTLS_CHK( mbedtls_sha512_starts_ret( &ctx, is384 ) );
MBEDTLS_CHK( mbedtls_sha512_update_ret( &ctx, input, ilen ) );
MBEDTLS_CHK( mbedtls_sha512_finish_ret( &ctx, output ) );
cleanup:
mbedtls_sha512_free( &ctx );
return( ret );
}
noinstrument int mbedtls_sha512_ret_384( const void *input, size_t ilen, unsigned char *output )
{
return mbedtls_sha512_ret( input, ilen, output, true );
}
noinstrument int mbedtls_sha512_ret_512( const void *input, size_t ilen, unsigned char *output )
{
return mbedtls_sha512_ret( input, ilen, output, false );
}
#if !defined(MBEDTLS_SHA512_NO_SHA384)
const mbedtls_md_info_t mbedtls_sha384_info = {
"SHA384",
MBEDTLS_MD_SHA384,
48,
128,
(void *)mbedtls_sha512_starts_384,
(void *)mbedtls_sha512_update_ret,
(void *)mbedtls_internal_sha512_process,
(void *)mbedtls_sha512_finish_ret,
mbedtls_sha512_ret_384,
};
#endif
const mbedtls_md_info_t mbedtls_sha512_info = {
"SHA512",
MBEDTLS_MD_SHA512,
64,
128,
(void *)mbedtls_sha512_starts_512,
(void *)mbedtls_sha512_update_ret,
(void *)mbedtls_internal_sha512_process,
(void *)mbedtls_sha512_finish_ret,
mbedtls_sha512_ret_512,
};
#endif /* MBEDTLS_SHA512_C */