306 lines
12 KiB
C
306 lines
12 KiB
C
/**
|
|
* \file common.h
|
|
*
|
|
* \brief Utility macros for internal use in the library
|
|
*/
|
|
/*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef MBEDTLS_LIBRARY_COMMON_H
|
|
#define MBEDTLS_LIBRARY_COMMON_H
|
|
|
|
#if defined(MBEDTLS_CONFIG_FILE)
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#else
|
|
#include "mbedtls/config.h"
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
|
|
/** Helper to define a function as static except when building invasive tests.
|
|
*
|
|
* If a function is only used inside its own source file and should be
|
|
* declared `static` to allow the compiler to optimize for code size,
|
|
* but that function has unit tests, define it with
|
|
* ```
|
|
* MBEDTLS_STATIC_TESTABLE int mbedtls_foo(...) { ... }
|
|
* ```
|
|
* and declare it in a header in the `library/` directory with
|
|
* ```
|
|
* #if defined(MBEDTLS_TEST_HOOKS)
|
|
* int mbedtls_foo(...);
|
|
* #endif
|
|
* ```
|
|
*/
|
|
#if defined(MBEDTLS_TEST_HOOKS)
|
|
#define MBEDTLS_STATIC_TESTABLE
|
|
#else
|
|
#define MBEDTLS_STATIC_TESTABLE static
|
|
#endif
|
|
|
|
/** Byte Reading Macros
|
|
*
|
|
* Given a multi-byte integer \p x, MBEDTLS_BYTE_n retrieves the n-th
|
|
* byte from x, where byte 0 is the least significant byte.
|
|
*/
|
|
#define MBEDTLS_BYTE_0( x ) ( (uint8_t) ( ( x ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_1( x ) ( (uint8_t) ( ( ( x ) >> 8 ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_2( x ) ( (uint8_t) ( ( ( x ) >> 16 ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_3( x ) ( (uint8_t) ( ( ( x ) >> 24 ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_4( x ) ( (uint8_t) ( ( ( x ) >> 32 ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_5( x ) ( (uint8_t) ( ( ( x ) >> 40 ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_6( x ) ( (uint8_t) ( ( ( x ) >> 48 ) & 0xff ) )
|
|
#define MBEDTLS_BYTE_7( x ) ( (uint8_t) ( ( ( x ) >> 56 ) & 0xff ) )
|
|
|
|
/**
|
|
* Get the unsigned 32 bits integer corresponding to four bytes in
|
|
* big-endian order (MSB first).
|
|
*
|
|
* \param data Base address of the memory to get the four bytes from.
|
|
* \param offset Offset from \p base of the first and most significant
|
|
* byte of the four bytes to build the 32 bits unsigned
|
|
* integer from.
|
|
*/
|
|
#ifndef MBEDTLS_GET_UINT32_BE
|
|
#define MBEDTLS_GET_UINT32_BE( data , offset ) \
|
|
( \
|
|
( (uint32_t) ( data )[( offset ) ] << 24 ) \
|
|
| ( (uint32_t) ( data )[( offset ) + 1] << 16 ) \
|
|
| ( (uint32_t) ( data )[( offset ) + 2] << 8 ) \
|
|
| ( (uint32_t) ( data )[( offset ) + 3] ) \
|
|
)
|
|
#endif
|
|
|
|
/**
|
|
* Put in memory a 32 bits unsigned integer in big-endian order.
|
|
*
|
|
* \param n 32 bits unsigned integer to put in memory.
|
|
* \param data Base address of the memory where to put the 32
|
|
* bits unsigned integer in.
|
|
* \param offset Offset from \p base where to put the most significant
|
|
* byte of the 32 bits unsigned integer \p n.
|
|
*/
|
|
#ifndef MBEDTLS_PUT_UINT32_BE
|
|
#define MBEDTLS_PUT_UINT32_BE( n, data, offset ) \
|
|
{ \
|
|
( data )[( offset ) ] = MBEDTLS_BYTE_3( n ); \
|
|
( data )[( offset ) + 1] = MBEDTLS_BYTE_2( n ); \
|
|
( data )[( offset ) + 2] = MBEDTLS_BYTE_1( n ); \
|
|
( data )[( offset ) + 3] = MBEDTLS_BYTE_0( n ); \
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Get the unsigned 32 bits integer corresponding to four bytes in
|
|
* little-endian order (LSB first).
|
|
*
|
|
* \param data Base address of the memory to get the four bytes from.
|
|
* \param offset Offset from \p base of the first and least significant
|
|
* byte of the four bytes to build the 32 bits unsigned
|
|
* integer from.
|
|
*/
|
|
#ifndef MBEDTLS_GET_UINT32_LE
|
|
#define MBEDTLS_GET_UINT32_LE( data, offset ) \
|
|
( \
|
|
( (uint32_t) ( data )[( offset ) ] ) \
|
|
| ( (uint32_t) ( data )[( offset ) + 1] << 8 ) \
|
|
| ( (uint32_t) ( data )[( offset ) + 2] << 16 ) \
|
|
| ( (uint32_t) ( data )[( offset ) + 3] << 24 ) \
|
|
)
|
|
#endif
|
|
|
|
/**
|
|
* Put in memory a 32 bits unsigned integer in little-endian order.
|
|
*
|
|
* \param n 32 bits unsigned integer to put in memory.
|
|
* \param data Base address of the memory where to put the 32
|
|
* bits unsigned integer in.
|
|
* \param offset Offset from \p base where to put the least significant
|
|
* byte of the 32 bits unsigned integer \p n.
|
|
*/
|
|
#ifndef MBEDTLS_PUT_UINT32_LE
|
|
#define MBEDTLS_PUT_UINT32_LE( n, data, offset ) \
|
|
{ \
|
|
( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \
|
|
( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \
|
|
( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n ); \
|
|
( data )[( offset ) + 3] = MBEDTLS_BYTE_3( n ); \
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Get the unsigned 16 bits integer corresponding to two bytes in
|
|
* little-endian order (LSB first).
|
|
*
|
|
* \param data Base address of the memory to get the two bytes from.
|
|
* \param offset Offset from \p base of the first and least significant
|
|
* byte of the two bytes to build the 16 bits unsigned
|
|
* integer from.
|
|
*/
|
|
#ifndef MBEDTLS_GET_UINT16_LE
|
|
#define MBEDTLS_GET_UINT16_LE( data, offset ) \
|
|
( \
|
|
( (uint16_t) ( data )[( offset ) ] ) \
|
|
| ( (uint16_t) ( data )[( offset ) + 1] << 8 ) \
|
|
)
|
|
#endif
|
|
|
|
/**
|
|
* Put in memory a 16 bits unsigned integer in little-endian order.
|
|
*
|
|
* \param n 16 bits unsigned integer to put in memory.
|
|
* \param data Base address of the memory where to put the 16
|
|
* bits unsigned integer in.
|
|
* \param offset Offset from \p base where to put the least significant
|
|
* byte of the 16 bits unsigned integer \p n.
|
|
*/
|
|
#ifndef MBEDTLS_PUT_UINT16_LE
|
|
#define MBEDTLS_PUT_UINT16_LE( n, data, offset ) \
|
|
{ \
|
|
( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \
|
|
( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Get the unsigned 16 bits integer corresponding to two bytes in
|
|
* big-endian order (MSB first).
|
|
*
|
|
* \param data Base address of the memory to get the two bytes from.
|
|
* \param offset Offset from \p base of the first and most significant
|
|
* byte of the two bytes to build the 16 bits unsigned
|
|
* integer from.
|
|
*/
|
|
#ifndef MBEDTLS_GET_UINT16_BE
|
|
#define MBEDTLS_GET_UINT16_BE( data, offset ) \
|
|
( \
|
|
( (uint16_t) ( data )[( offset ) ] << 8 ) \
|
|
| ( (uint16_t) ( data )[( offset ) + 1] ) \
|
|
)
|
|
#endif
|
|
|
|
/**
|
|
* Put in memory a 16 bits unsigned integer in big-endian order.
|
|
*
|
|
* \param n 16 bits unsigned integer to put in memory.
|
|
* \param data Base address of the memory where to put the 16
|
|
* bits unsigned integer in.
|
|
* \param offset Offset from \p base where to put the most significant
|
|
* byte of the 16 bits unsigned integer \p n.
|
|
*/
|
|
#ifndef MBEDTLS_PUT_UINT16_BE
|
|
#define MBEDTLS_PUT_UINT16_BE( n, data, offset ) \
|
|
{ \
|
|
( data )[( offset ) ] = MBEDTLS_BYTE_1( n ); \
|
|
( data )[( offset ) + 1] = MBEDTLS_BYTE_0( n ); \
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Get the unsigned 64 bits integer corresponding to eight bytes in
|
|
* big-endian order (MSB first).
|
|
*
|
|
* \param data Base address of the memory to get the eight bytes from.
|
|
* \param offset Offset from \p base of the first and most significant
|
|
* byte of the eight bytes to build the 64 bits unsigned
|
|
* integer from.
|
|
*/
|
|
#ifndef MBEDTLS_GET_UINT64_BE
|
|
#define MBEDTLS_GET_UINT64_BE( data, offset ) \
|
|
( \
|
|
( (uint64_t) ( data )[( offset ) ] << 56 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 1] << 48 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 2] << 40 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 3] << 32 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 4] << 24 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 5] << 16 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 6] << 8 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 7] ) \
|
|
)
|
|
#endif
|
|
|
|
/**
|
|
* Put in memory a 64 bits unsigned integer in big-endian order.
|
|
*
|
|
* \param n 64 bits unsigned integer to put in memory.
|
|
* \param data Base address of the memory where to put the 64
|
|
* bits unsigned integer in.
|
|
* \param offset Offset from \p base where to put the most significant
|
|
* byte of the 64 bits unsigned integer \p n.
|
|
*/
|
|
#ifndef MBEDTLS_PUT_UINT64_BE
|
|
#define MBEDTLS_PUT_UINT64_BE( n, data, offset ) \
|
|
{ \
|
|
( data )[( offset ) ] = MBEDTLS_BYTE_7( n ); \
|
|
( data )[( offset ) + 1] = MBEDTLS_BYTE_6( n ); \
|
|
( data )[( offset ) + 2] = MBEDTLS_BYTE_5( n ); \
|
|
( data )[( offset ) + 3] = MBEDTLS_BYTE_4( n ); \
|
|
( data )[( offset ) + 4] = MBEDTLS_BYTE_3( n ); \
|
|
( data )[( offset ) + 5] = MBEDTLS_BYTE_2( n ); \
|
|
( data )[( offset ) + 6] = MBEDTLS_BYTE_1( n ); \
|
|
( data )[( offset ) + 7] = MBEDTLS_BYTE_0( n ); \
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Get the unsigned 64 bits integer corresponding to eight bytes in
|
|
* little-endian order (LSB first).
|
|
*
|
|
* \param data Base address of the memory to get the eight bytes from.
|
|
* \param offset Offset from \p base of the first and least significant
|
|
* byte of the eight bytes to build the 64 bits unsigned
|
|
* integer from.
|
|
*/
|
|
#ifndef MBEDTLS_GET_UINT64_LE
|
|
#define MBEDTLS_GET_UINT64_LE( data, offset ) \
|
|
( \
|
|
( (uint64_t) ( data )[( offset ) + 7] << 56 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 6] << 48 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 5] << 40 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 4] << 32 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 3] << 24 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 2] << 16 ) \
|
|
| ( (uint64_t) ( data )[( offset ) + 1] << 8 ) \
|
|
| ( (uint64_t) ( data )[( offset ) ] ) \
|
|
)
|
|
#endif
|
|
|
|
/**
|
|
* Put in memory a 64 bits unsigned integer in little-endian order.
|
|
*
|
|
* \param n 64 bits unsigned integer to put in memory.
|
|
* \param data Base address of the memory where to put the 64
|
|
* bits unsigned integer in.
|
|
* \param offset Offset from \p base where to put the least significant
|
|
* byte of the 64 bits unsigned integer \p n.
|
|
*/
|
|
#ifndef MBEDTLS_PUT_UINT64_LE
|
|
#define MBEDTLS_PUT_UINT64_LE( n, data, offset ) \
|
|
{ \
|
|
( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \
|
|
( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \
|
|
( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n ); \
|
|
( data )[( offset ) + 3] = MBEDTLS_BYTE_3( n ); \
|
|
( data )[( offset ) + 4] = MBEDTLS_BYTE_4( n ); \
|
|
( data )[( offset ) + 5] = MBEDTLS_BYTE_5( n ); \
|
|
( data )[( offset ) + 6] = MBEDTLS_BYTE_6( n ); \
|
|
( data )[( offset ) + 7] = MBEDTLS_BYTE_7( n ); \
|
|
}
|
|
#endif
|
|
|
|
#endif /* MBEDTLS_LIBRARY_COMMON_H */
|