/* 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 #if defined(_WIN32) || defined(WIN32) #ifndef XP_WIN32 #define XP_WIN32 #endif #endif #endif #ifdef unix #ifndef XP_UNIX #define XP_UNIX #endif #endif #include #include #include #include #include #include #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. */ typedef struct PORTCheapArenaPool_str { PLArenaPool arena; PRUint32 magic; /* This is used to distinguish the two subclasses. */ } PORTCheapArenaPool; SEC_BEGIN_PROTOS extern void *PORT_Alloc(size_t len); extern void *PORT_Realloc(void *old, size_t len); extern void *PORT_ZAlloc(size_t len); extern void *PORT_ZAllocAligned(size_t bytes, size_t alignment, void **mem); extern void *PORT_ZAllocAlignedOffset(size_t bytes, size_t alignment, size_t offset); extern void PORT_Free(void *ptr); extern void PORT_ZFree(void *ptr, size_t len); extern char *PORT_Strdup(const char *s); extern void PORT_SetError(int value); extern int PORT_GetError(void); /* These functions are for use with PORTArenaPools. */ extern PLArenaPool *PORT_NewArena(unsigned long chunksize); extern void PORT_FreeArena(PLArenaPool *arena, PRBool zero); /* These functions are for use with PORTCheapArenaPools. */ extern void PORT_InitCheapArena(PORTCheapArenaPool *arena, unsigned long chunksize); extern void PORT_DestroyCheapArena(PORTCheapArenaPool *arena); /* These functions work with both kinds of arena pool. */ extern void *PORT_ArenaAlloc(PLArenaPool *arena, size_t size); extern void *PORT_ArenaZAlloc(PLArenaPool *arena, size_t size); extern void *PORT_ArenaGrow(PLArenaPool *arena, void *ptr, size_t oldsize, size_t newsize); extern void *PORT_ArenaMark(PLArenaPool *arena); extern void PORT_ArenaRelease(PLArenaPool *arena, void *mark); extern void PORT_ArenaZRelease(PLArenaPool *arena, void *mark); extern void PORT_ArenaUnmark(PLArenaPool *arena, void *mark); extern char *PORT_ArenaStrdup(PLArenaPool *arena, const char *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) /* macros to handle endian based byte conversion */ #define PORT_GET_BYTE_BE(value, offset, len) \ ((unsigned char)(((len) - (offset)-1) >= sizeof(value) ? 0 : (((value) >> (((len) - (offset)-1) * PR_BITS_PER_BYTE)) & 0xff))) #define PORT_GET_BYTE_LE(value, offset, len) \ ((unsigned char)((offset) > sizeof(value) ? 0 : (((value) >> ((offset)*PR_BITS_PER_BYTE)) & 0xff))) /* 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! */ #define PORT_Atoi(buff) (int)strtol(buff, NULL, 10) /* 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) #define PORT_ErrorToName PR_ErrorToName #define PORT_Memcmp memcmp #define PORT_Memcpy memcpy #ifndef SUNOS4 #define PORT_Memmove memmove #else /*SUNOS4*/ #define PORT_Memmove(s, ct, n) bcopy((ct), (s), (n)) #endif /*SUNOS4*/ #define PORT_Memset memset #define PORT_Strcasecmp PL_strcasecmp #define PORT_Strcat strcat #define PORT_Strchr strchr #define PORT_Strrchr strrchr #define PORT_Strcmp strcmp #define PORT_Strcpy strcpy #define PORT_Strlen(s) strlen(s) #define PORT_Strncasecmp PL_strncasecmp #define PORT_Strncat strncat #define PORT_Strncmp strncmp #define PORT_Strncpy strncpy #define PORT_Strpbrk strpbrk #define PORT_Strstr strstr #define PORT_Strtok strtok #define PORT_Tolower tolower typedef PRBool(PR_CALLBACK *PORTCharConversionWSwapFunc)(PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen, PRBool swapBytes); typedef PRBool(PR_CALLBACK *PORTCharConversionFunc)(PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); SEC_BEGIN_PROTOS void PORT_SetUCS4_UTF8ConversionFunction(PORTCharConversionFunc convFunc); void PORT_SetUCS2_ASCIIConversionFunction(PORTCharConversionWSwapFunc convFunc); PRBool PORT_UCS4_UTF8Conversion(PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); PRBool PORT_UCS2_ASCIIConversion(PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen, PRBool swapBytes); void PORT_SetUCS2_UTF8ConversionFunction(PORTCharConversionFunc convFunc); PRBool PORT_UCS2_UTF8Conversion(PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); /* One-way conversion from ISO-8859-1 to UTF-8 */ PRBool PORT_ISO88591_UTF8Conversion(const unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); extern PRBool sec_port_ucs4_utf8_conversion_function( PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); extern PRBool sec_port_ucs2_utf8_conversion_function( PRBool toUnicode, unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); /* One-way conversion from ISO-8859-1 to UTF-8 */ extern PRBool sec_port_iso88591_utf8_conversion_function( const unsigned char *inBuf, unsigned int inBufLen, unsigned char *outBuf, unsigned int maxOutBufLen, unsigned int *outBufLen); extern int NSS_PutEnv(const char *envVarName, const char *envValue); extern int NSS_SecureMemcmp(const void *a, const void *b, size_t n); extern unsigned int NSS_SecureMemcmpZero(const void *mem, size_t n); /* * 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(const char *existingShLibName, PRFuncPtr staticShLibFunc, const char *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, ab so d=b * LxS if a has the high bit on, it's negative a> (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 #endif /* _SECPORT_H_ */