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src/ltc/headers/tomcrypt_private.h  view on Meta::CPAN

/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

#include "tomcrypt.h"
#include <stdarg.h>

#ifndef TOMCRYPT_PRIVATE_H_
#define TOMCRYPT_PRIVATE_H_

/*
 * Internal Macros
 */
/* Static assertion */
#define LTC_STATIC_ASSERT(msg, cond) typedef char ltc_static_assert_##msg[(cond) ? 1 : -1];

#define LTC_PAD_MASK       (0xF000U)

/* only real 64bit, not ILP32 */
#if defined(ENDIAN_64BITWORD) && !defined(ENDIAN_64BITWORD_ILP32)
   #define CONSTPTR(n) CONST64(n)
#else
   #define CONSTPTR(n) n ## uL
#endif

LTC_STATIC_ASSERT(correct_CONSTPTR_size, sizeof(CONSTPTR(1)) == sizeof(void*))

/* Poor-man's `uintptr_t` since we can't use stdint.h
 * c.f. https://github.com/DCIT/perl-CryptX/issues/95#issuecomment-1745280962 */
typedef size_t ltc_uintptr;

LTC_STATIC_ASSERT(correct_ltc_uintptr_size, sizeof(ltc_uintptr) == sizeof(void*))

/* Aligns a `unsigned char` buffer `buf` to `n` bytes and returns that aligned address.
 * Make sure that the buffer that is passed is huge enough.
 */
#define LTC_ALIGN_BUF(buf, align) ((void*)((ltc_uintptr)&((unsigned char*)(buf))[(align) - 1] & (~(CONSTPTR(align) - CONSTPTR(1)))))

#define LTC_OID_MAX_STRLEN 256

/* `NULL` as defined by the standard is not guaranteed to be of a pointer
 * type. In order to make sure that in vararg API's a pointer type is used,
 * define our own version and use that one internally.
 */
#ifndef LTC_NULL
   #define LTC_NULL ((void *)0)
#endif

#define LTC_ARRAY_SIZE(arr) (sizeof(arr)/sizeof(arr[0]))

/*
 * Internal Enums
 */

enum ltc_oid_id {
   LTC_OID_UNDEF,
   LTC_OID_RSA,
   LTC_OID_DSA,
   LTC_OID_EC,
   LTC_OID_EC_PRIMEF,
   LTC_OID_X25519,
   LTC_OID_ED25519,
   LTC_OID_X448,
   LTC_OID_ED448,
   LTC_OID_DH,
   LTC_OID_RSA_OAEP,
   LTC_OID_RSA_MGF1,
   LTC_OID_RSA_PSS,
   LTC_OID_NUM
};

/*