/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* * secport.h - portability interfaces for security libraries
*/
#ifndef _SECPORT_H_ #define _SECPORT_H_
#include"utilrename.h" #include"prlink.h"
/* * define XP_WIN, or XP_UNIX, in case they are not defined * by anyone else
*/ #ifdef _WINDOWS #ifndef XP_WIN #define XP_WIN #endif #ifdefined(_WIN32) || defined(WIN32) #ifndef XP_WIN32 #define XP_WIN32 #endif #endif #endif
#include <ctype.h> /* ask for Annex K for memset_s. will set the appropriate #define
* if Annex K is supported */ #define __STDC_WANT_LIB_EXT1__ 1 #include <string.h> #include <stddef.h> #include <stdlib.h> #include <stdint.h> #include"prtypes.h" #include"prlog.h"/* for PR_ASSERT */ #include"plarena.h" #include"plstr.h"
/* * HACK for NSS 2.8 to allow Admin to compile without source changes.
*/ #ifndef SEC_BEGIN_PROTOS #include"seccomon.h" #endif
/* * The PORT_*Arena* function signatures mostly involve PLArenaPool* arguments. * But this is misleading! It's not actually safe to use vanilla PLArenaPools * with them. There are two "subclasses" of PLArenaPool that should be used * instead. * * - PORTArenaPool (defined in secport.c): this "subclass" is always * heap-allocated and uses a (heap-allocated) lock to protect all accesses. * Use PORT_NewArena() and PORT_FreeArena() to create and destroy * PORTArenaPools. * * - PORTCheapArenaPool (defined here): this "subclass" can be stack-allocated * and does not use a lock to protect accesses. This makes it cheaper but * less general. It is best used for arena pools that (a) are hot, (b) have * lifetimes bounded within a single function, and (c) don't need locking. * Use PORT_InitCheapArena() and PORT_DestroyCheapArena() to initialize and * finalize PORTCheapArenaPools. * * All the other PORT_Arena* functions will operate safely with either * subclass.
*/ typedefstruct PORTCheapArenaPool_str {
PLArenaPool arena;
PRUint32 magic; /* This is used to distinguish the two subclasses. */
} PORTCheapArenaPool;
/* These functions are for use with PORTArenaPools. */ extern PLArenaPool *PORT_NewArena(unsignedlong chunksize); externvoid PORT_FreeArena(PLArenaPool *arena, PRBool zero);
/* These functions are for use with PORTCheapArenaPools. */ externvoid PORT_InitCheapArena(PORTCheapArenaPool *arena, unsignedlong chunksize); externvoid PORT_DestroyCheapArena(PORTCheapArenaPool *arena);
/* These functions work with both kinds of arena pool. */ externvoid *PORT_ArenaAlloc(PLArenaPool *arena, size_t size); externvoid *PORT_ArenaZAlloc(PLArenaPool *arena, size_t size); externvoid *PORT_ArenaGrow(PLArenaPool *arena, void *ptr,
size_t oldsize, size_t newsize); externvoid *PORT_ArenaMark(PLArenaPool *arena); externvoid PORT_ArenaRelease(PLArenaPool *arena, void *mark); externvoid PORT_ArenaZRelease(PLArenaPool *arena, void *mark); externvoid PORT_ArenaUnmark(PLArenaPool *arena, void *mark); externchar *PORT_ArenaStrdup(PLArenaPool *arena, constchar *str);
SEC_END_PROTOS
#define PORT_Assert PR_ASSERT /* This is a variation of PORT_Assert where the arguments will be always * used either in Debug or not. But, in optimized mode the result will be
* ignored. See more details in Bug 1588015. */ #define PORT_AssertArg PR_ASSERT_ARG
/* Assert the current location can't be reached, passing a reason-string. */ #define PORT_AssertNotReached(reasonStr) PR_NOT_REACHED(reasonStr)
/* This runs a function that should return SECSuccess. * Intended for NSS internal use only. * The return value is asserted in a debug build, otherwise it is ignored. * This is no substitute for proper error handling. It is OK only if you * have ensured that the function cannot fail by other means such as checking * prerequisites. In that case this can be used as a safeguard against * unexpected changes in a function.
*/ #ifdef DEBUG #define PORT_CheckSuccess(f) PR_ASSERT((f) == SECSuccess) #else #define PORT_CheckSuccess(f) (f) #endif #define PORT_ZNew(type) (type *)PORT_ZAlloc(sizeof(type)) #define PORT_ZNewAligned(type, alignment, mem) \
(type *)PORT_ZAllocAlignedOffset(sizeof(type), alignment, offsetof(type, mem)) #define PORT_New(type) (type *)PORT_Alloc(sizeof(type)) #define PORT_ArenaNew(poolp, type) \
(type *)PORT_ArenaAlloc(poolp, sizeof(type)) #define PORT_ArenaZNew(poolp, type) \
(type *)PORT_ArenaZAlloc(poolp, sizeof(type)) #define PORT_NewArray(type, num) \
(type *)PORT_Alloc(sizeof(type) * (num)) #define PORT_ZNewArray(type, num) \
(type *)PORT_ZAlloc(sizeof(type) * (num)) #define PORT_ArenaNewArray(poolp, type, num) \
(type *)PORT_ArenaAlloc(poolp, sizeof(type) * (num)) #define PORT_ArenaZNewArray(poolp, type, num) \
(type *)PORT_ArenaZAlloc(poolp, sizeof(type) * (num))
/* Please, keep these defines sorted alphabetically. Thanks! */
/* Returns a UTF-8 encoded constant error string for err. * Returns NULL if initialization of the error tables fails * due to insufficient memory. * * This string must not be modified by the application.
*/ #define PORT_ErrorToString(err) PR_ErrorToString((err), PR_LANGUAGE_I_DEFAULT)
/* * Load a shared library called "newShLibName" in the same directory as * a shared library that is already loaded, called existingShLibName. * A pointer to a static function in that shared library, * staticShLibFunc, is required. * * existingShLibName: * The file name of the shared library that shall be used as the * "reference library". The loader will attempt to load the requested * library from the same directory as the reference library. * * staticShLibFunc: * Pointer to a static function in the "reference library". * * newShLibName: * The simple file name of the new shared library to be loaded. * * We use PR_GetLibraryFilePathname to get the pathname of the loaded * shared lib that contains this function, and then do a * PR_LoadLibraryWithFlags with an absolute pathname for the shared * library to be loaded. * * On Windows, the "alternate search path" strategy is employed, if available. * On Unix, if existingShLibName is a symbolic link, and no link exists for the * new library, the original link will be resolved, and the new library loaded * from the resolved location. * * If the new shared library is not found in the same location as the reference * library, it will then be loaded from the normal system library path.
*/
PRLibrary *
PORT_LoadLibraryFromOrigin(constchar *existingShLibName,
PRFuncPtr staticShLibFunc, constchar *newShLibName);
SEC_END_PROTOS
/* * Constant time macros
*/ /* These macros use the fact that arithmetic shift shifts-in the sign bit. * However, this is not ensured by the C standard so you may need to replace * them with something else for odd compilers. These macros work for object * sizes up to 32 bits. The inequalities will produce incorrect results if * abs(a-b) >= PR_UINT32_MAX/2. This can be a voided if unsigned values stay * within the range 0-PRUINT32_MAX/2 and signed values stay within the range * -PRINT32_MAX/2-PRINT32_MAX/2. If these are insufficient, we can fix * this by either expanding the PORT_CT_DUPLICATE_MSB_TO_ALL to PRUint64 * or by creating the following new macros for inequality: * * PORT_CT_OVERFLOW prevents the overflow condition by handling the case * where the high bits in a and b are different specially. Basically if * the high bit in a and b differs we can just * copy the high bit of one of the parameters to determine the result as * follows: * GxU if a has the high bit on, a>b, so d=a * LxU if b has the high bit on, a<b, so d=b * GxS if b has the high bit on, it's negative a>b so d=b * LxS if a has the high bit on, it's negative a<b so d=a * where PORT_CT_xxU() macros do unsigned compares and PORT_CT_xxS() do signed * compares. * * #define PORT_CT_OVERFLOW(a,b,c,d) \ * PORT_CT_SEL(PORT_CT_DUPLICATE_MSB_TO_ALL((a)^(b)), \ * (PORT_CT_DUPLICATE_MSB_TO_ALL(d)),c) * #define PORT_CT_GTU(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_GT(a,b),a) * #define PORT_CT_LTU(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_LT(a,b),b) * #define PORT_CT_GEU(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_GE(a,b),a) * #define PORT_CT_LEU(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_LE(a,b),b) * #define PORT_CT_GTS(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_GT(a,b),b) * #define PORT_CT_LTS(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_LT(a,b),a) * #define PORT_CT_GES(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_GE(a,b),b) * #define PORT_CT_LES(a,b) PORT_CT_OVERFLOW(a,b,PORT_CT_LE(a,b),a) * *
* */ /* Constant-time helper macro that copies the MSB of x to all other bits. */ #define PORT_CT_DUPLICATE_MSB_TO_ALL(x) ((PRUint32)((PRInt32)(x) >> (sizeof(PRInt32) * 8 - 1)))
/* Constant-time helper macro that selects l or r depending on all-1 or all-0
* mask m */ #define PORT_CT_SEL(m, l, r) (((m) & (l)) | (~(m) & (r)))
/* Constant-time helper macro that returns all-1s if x is not 0; and all-0s
* otherwise. */ #define PORT_CT_NOT_ZERO(x) (PORT_CT_DUPLICATE_MSB_TO_ALL(((x) | (0 - (x)))))
/* Constant-time helper macro that returns all-1s if x is 0; and all-0s
* otherwise. */ #define PORT_CT_ZERO(x) (~PORT_CT_DUPLICATE_MSB_TO_ALL(((x) | (0 - (x)))))
/* Constant-time helper macro for equalities and inequalities.
* returns all-1's for true and all-0's for false */ #define PORT_CT_EQ(a, b) PORT_CT_ZERO(((a) - (b))) #define PORT_CT_NE(a, b) PORT_CT_NOT_ZERO(((a) - (b))) #define PORT_CT_GT(a, b) PORT_CT_DUPLICATE_MSB_TO_ALL((b) - (a)) #define PORT_CT_LT(a, b) PORT_CT_DUPLICATE_MSB_TO_ALL((a) - (b)) #define PORT_CT_GE(a, b) (~PORT_CT_LT(a, b)) #define PORT_CT_LE(a, b) (~PORT_CT_GT(a, b)) #define PORT_CT_TRUE (~0) #define PORT_CT_FALSE 0
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.