1fde2092d0
Rediff patch from PR 1453, lstrlenW is no longer used upstream so that part of the patch was dropped.
366 lines
14 KiB
C++
366 lines
14 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 <assert.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/* Define `inline` on some non-C99-compliant compilers. */
|
|
#if (defined(__ARMCC_VERSION) || defined(_MSC_VER)) && \
|
|
!defined(inline) && !defined(__cplusplus)
|
|
#define inline __inline
|
|
#endif
|
|
|
|
/** 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
|
|
|
|
/** Return an offset into a buffer.
|
|
*
|
|
* This is just the addition of an offset to a pointer, except that this
|
|
* function also accepts an offset of 0 into a buffer whose pointer is null.
|
|
* (`p + n` has undefined behavior when `p` is null, even when `n == 0`.
|
|
* A null pointer is a valid buffer pointer when the size is 0, for example
|
|
* as the result of `malloc(0)` on some platforms.)
|
|
*
|
|
* \param p Pointer to a buffer of at least n bytes.
|
|
* This may be \p NULL if \p n is zero.
|
|
* \param n An offset in bytes.
|
|
* \return Pointer to offset \p n in the buffer \p p.
|
|
* Note that this is only a valid pointer if the size of the
|
|
* buffer is at least \p n + 1.
|
|
*/
|
|
static inline unsigned char *mbedtls_buffer_offset(
|
|
unsigned char *p, size_t n)
|
|
{
|
|
return p == NULL ? NULL : p + n;
|
|
}
|
|
|
|
/** Return an offset into a read-only buffer.
|
|
*
|
|
* Similar to mbedtls_buffer_offset(), but for const pointers.
|
|
*
|
|
* \param p Pointer to a buffer of at least n bytes.
|
|
* This may be \p NULL if \p n is zero.
|
|
* \param n An offset in bytes.
|
|
* \return Pointer to offset \p n in the buffer \p p.
|
|
* Note that this is only a valid pointer if the size of the
|
|
* buffer is at least \p n + 1.
|
|
*/
|
|
static inline const unsigned char *mbedtls_buffer_offset_const(
|
|
const unsigned char *p, size_t n)
|
|
{
|
|
return p == NULL ? NULL : p + n;
|
|
}
|
|
|
|
/** 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
|
|
|
|
/* Always provide a static assert macro, so it can be used unconditionally.
|
|
* It will expand to nothing on some systems.
|
|
* Can be used outside functions (but don't add a trailing ';' in that case:
|
|
* the semicolon is included here to avoid triggering -Wextra-semi when
|
|
* MBEDTLS_STATIC_ASSERT() expands to nothing).
|
|
* Can't use the C11-style `defined(static_assert)` on FreeBSD, since it
|
|
* defines static_assert even with -std=c99, but then complains about it.
|
|
*/
|
|
#if defined(static_assert) && !defined(__FreeBSD__)
|
|
#define MBEDTLS_STATIC_ASSERT(expr, msg) static_assert(expr, msg);
|
|
#else
|
|
#define MBEDTLS_STATIC_ASSERT(expr, msg)
|
|
#endif
|
|
|
|
#endif /* MBEDTLS_LIBRARY_COMMON_H */
|