secport.c
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上传日期:2007-01-12
资源大小:3042k
文件大小:15k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (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.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- /*
- * secport.c - portability interfaces for security libraries
- *
- * This file abstracts out libc functionality that libsec depends on
- *
- * NOTE - These are not public interfaces
- *
- * $Id: secport.c,v 1.4 2000/09/20 17:07:22 relyea%netscape.com Exp $
- */
- #include "seccomon.h"
- #include "prmem.h"
- #include "prerror.h"
- #include "plarena.h"
- #include "secerr.h"
- #include "prmon.h"
- #include "nsslocks.h"
- #include "secport.h"
- #ifdef DEBUG
- #define THREADMARK
- #endif /* DEBUG */
- #ifdef THREADMARK
- #include "prthread.h"
- #endif /* THREADMARK */
- #if defined(XP_UNIX) || defined(XP_MAC) || defined(XP_OS2)
- #include <stdlib.h>
- #else
- #include "wtypes.h"
- #endif
- #define SET_ERROR_CODE /* place holder for code to set PR error code. */
- #ifdef THREADMARK
- typedef struct threadmark_mark_str {
- struct threadmark_mark_str *next;
- void *mark;
- } threadmark_mark;
- typedef struct threadmark_arena_str {
- PLArenaPool arena;
- PRUint32 magic;
- PRThread *marking_thread;
- threadmark_mark *first_mark;
- } threadmark_arena;
- #define THREADMARK_MAGIC 0xB8AC9BDD /* In honor of nelsonb */
- #endif /* THREADMARK */
- /* count of allocation failures. */
- unsigned long port_allocFailures;
- /* locations for registering Unicode conversion functions.
- * XXX is this the appropriate location? or should they be
- * moved to client/server specific locations?
- */
- PORTCharConversionFunc ucs4Utf8ConvertFunc;
- PORTCharConversionFunc ucs2Utf8ConvertFunc;
- PORTCharConversionWSwapFunc ucs2AsciiConvertFunc;
- void *
- PORT_Alloc(size_t bytes)
- {
- void *rv;
- /* Always allocate a non-zero amount of bytes */
- rv = (void *)PR_Malloc(bytes ? bytes : 1);
- if (!rv) {
- ++port_allocFailures;
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- }
- return rv;
- }
- void *
- PORT_Realloc(void *oldptr, size_t bytes)
- {
- void *rv;
- rv = (void *)PR_Realloc(oldptr, bytes);
- if (!rv) {
- ++port_allocFailures;
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- }
- return rv;
- }
- #ifdef XP_MAC
- char *
- PORT_Strdup(const char *cp)
- {
- size_t len = PORT_Strlen(cp);
- char *buf;
- buf = (char *)PORT_Alloc(len+1);
- if (buf == NULL) return;
- PORT_Memcpy(buf,cp,len+1);
- return buf;
- }
- #endif
- void *
- PORT_ZAlloc(size_t bytes)
- {
- void *rv;
- /* Always allocate a non-zero amount of bytes */
- rv = (void *)PR_Calloc(1, bytes ? bytes : 1);
- if (!rv) {
- ++port_allocFailures;
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- }
- return rv;
- }
- void
- PORT_Free(void *ptr)
- {
- if (ptr) {
- PR_Free(ptr);
- }
- }
- void
- PORT_ZFree(void *ptr, size_t len)
- {
- if (ptr) {
- memset(ptr, 0, len);
- PR_Free(ptr);
- }
- }
- void
- PORT_SetError(int value)
- {
- PR_SetError(value, 0);
- return;
- }
- int
- PORT_GetError(void)
- {
- return(PR_GetError());
- }
- /********************* Arena code follows *****************************/
- PRMonitor * arenaMonitor;
- static void
- getArenaLock(void)
- {
- if (!arenaMonitor) {
- nss_InitMonitor(&arenaMonitor);
- }
- if (arenaMonitor)
- PR_EnterMonitor(arenaMonitor);
- }
- static void
- releaseArenaLock(void)
- {
- if (arenaMonitor)
- PR_ExitMonitor(arenaMonitor);
- }
- PLArenaPool *
- PORT_NewArena(unsigned long chunksize)
- {
- PLArenaPool *arena;
-
- getArenaLock();
- #ifdef THREADMARK
- {
- threadmark_arena *tarena = (threadmark_arena *)
- PORT_ZAlloc(sizeof(threadmark_arena));
- if( (threadmark_arena *)NULL != tarena ) {
- arena = &tarena->arena;
- tarena->magic = THREADMARK_MAGIC;
- } else {
- arena = (PLArenaPool *)NULL;
- }
- }
- #else /* THREADMARK */
- arena = (PLArenaPool*)PORT_ZAlloc(sizeof(PLArenaPool));
- #endif /* THREADMARK */
- if ( arena != NULL ) {
- PL_InitArenaPool(arena, "security", chunksize, sizeof(double));
- }
- releaseArenaLock();
- return(arena);
- }
- void *
- PORT_ArenaAlloc(PLArenaPool *arena, size_t size)
- {
- void *p;
- getArenaLock();
- #ifdef THREADMARK
- {
- /* Is it one of ours? Assume so and check the magic */
- threadmark_arena *tarena = (threadmark_arena *)arena;
- if( THREADMARK_MAGIC == tarena->magic ) {
- /* Most likely one of ours. Is there a thread id? */
- if( (PRThread *)NULL != tarena->marking_thread ) {
- /* Yes. Has this arena been marked by this thread? */
- if( tarena->marking_thread == PR_GetCurrentThread() ) {
- /* Yup. Everything's okay. */
- ;
- } else {
- /* Nope. BZZT! error */
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return (void *)NULL;
- }
- } /* tid != null */
- } /* tarena */
- } /* scope */
- #endif /* THREADMARK */
- PL_ARENA_ALLOCATE(p, arena, size);
- releaseArenaLock();
- if (p == NULL) {
- ++port_allocFailures;
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- }
- return(p);
- }
- void *
- PORT_ArenaZAlloc(PLArenaPool *arena, size_t size)
- {
- void *p;
- getArenaLock();
- #ifdef THREADMARK
- {
- /* Is it one of ours? Assume so and check the magic */
- threadmark_arena *tarena = (threadmark_arena *)arena;
- if( THREADMARK_MAGIC == tarena->magic ) {
- /* Most likely one of ours. Is there a thread id? */
- if( (PRThread *)NULL != tarena->marking_thread ) {
- /* Yes. Has this arena been marked by this thread? */
- if( tarena->marking_thread == PR_GetCurrentThread() ) {
- /* Yup. Everything's okay. */
- ;
- } else {
- /* No, it was a different thread BZZT! error */
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return (void *)NULL;
- }
- } /* tid != null */
- } /* tarena */
- } /* scope */
- #endif /* THREADMARK */
- PL_ARENA_ALLOCATE(p, arena, size);
- releaseArenaLock();
- if (p == NULL) {
- ++port_allocFailures;
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- } else {
- PORT_Memset(p, 0, size);
- }
- return(p);
- }
- /* XXX - need to zeroize!! - jsw */
- void
- PORT_FreeArena(PLArenaPool *arena, PRBool zero)
- {
- getArenaLock();
- PL_FinishArenaPool(arena);
- PORT_Free(arena);
- releaseArenaLock();
- }
- void *
- PORT_ArenaGrow(PLArenaPool *arena, void *ptr, size_t oldsize, size_t newsize)
- {
- PORT_Assert(newsize >= oldsize);
-
- getArenaLock();
- /* Do we do a THREADMARK check here? */
- PL_ARENA_GROW(ptr, arena, oldsize, ( newsize - oldsize ) );
- releaseArenaLock();
-
- return(ptr);
- }
- void *
- PORT_ArenaMark(PLArenaPool *arena)
- {
- void * result;
- getArenaLock();
- #ifdef THREADMARK
- {
- threadmark_mark *tm, **pw;
- threadmark_arena *tarena = (threadmark_arena *)arena;
- if( THREADMARK_MAGIC == tarena->magic ) {
- /* one of ours */
- if( (PRThread *)NULL == tarena->marking_thread ) {
- /* First mark */
- tarena->marking_thread = PR_GetCurrentThread();
- } else {
- if( PR_GetCurrentThread() != tarena->marking_thread ) {
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return (void *)NULL;
- }
- }
- result = PL_ARENA_MARK(arena);
- PL_ARENA_ALLOCATE(tm, arena, sizeof(threadmark_mark));
- if( (threadmark_mark *)NULL == tm ) {
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- return (void *)NULL;
- }
- tm->mark = result;
- tm->next = (threadmark_mark *)NULL;
- pw = &tarena->first_mark;
- while( (threadmark_mark *)NULL != *pw ) {
- pw = &(*pw)->next;
- }
- *pw = tm;
- } else {
- /* a "pure" NSPR arena */
- result = PL_ARENA_MARK(arena);
- }
- }
- #else /* THREADMARK */
- result = PL_ARENA_MARK(arena);
- #endif /* THREADMARK */
- releaseArenaLock();
- return result;
- }
- void
- PORT_ArenaRelease(PLArenaPool *arena, void *mark)
- {
- getArenaLock();
- #ifdef THREADMARK
- {
- threadmark_arena *tarena = (threadmark_arena *)arena;
- if( THREADMARK_MAGIC == tarena->magic ) {
- threadmark_mark **pw, *tm;
- if( PR_GetCurrentThread() != tarena->marking_thread ) {
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return /* no error indication available */ ;
- }
- pw = &tarena->first_mark;
- while( ((threadmark_mark *)NULL != *pw) && (mark != (*pw)->mark) ) {
- pw = &(*pw)->next;
- }
- if( (threadmark_mark *)NULL == *pw ) {
- /* bad mark */
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return /* no error indication available */ ;
- }
- tm = *pw;
- *pw = (threadmark_mark *)NULL;
- PL_ARENA_RELEASE(arena, mark);
- if( (threadmark_mark *)NULL == tarena->first_mark ) {
- tarena->marking_thread = (PRThread *)NULL;
- }
- } else {
- PL_ARENA_RELEASE(arena, mark);
- }
- }
- #else /* THREADMARK */
- PL_ARENA_RELEASE(arena, mark);
- #endif /* THREADMARK */
- releaseArenaLock();
- }
- void
- PORT_ArenaUnmark(PLArenaPool *arena, void *mark)
- {
- #ifdef THREADMARK
- getArenaLock();
- {
- threadmark_arena *tarena = (threadmark_arena *)arena;
- if( THREADMARK_MAGIC == tarena->magic ) {
- threadmark_mark **pw, *tm;
- if( PR_GetCurrentThread() != tarena->marking_thread ) {
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return /* no error indication available */ ;
- }
- pw = &tarena->first_mark;
- while( ((threadmark_mark *)NULL != *pw) && (mark != (*pw)->mark) ) {
- pw = &(*pw)->next;
- }
- if( (threadmark_mark *)NULL == *pw ) {
- /* bad mark */
- releaseArenaLock();
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- PORT_Assert(0);
- return /* no error indication available */ ;
- }
- tm = *pw;
- *pw = (threadmark_mark *)NULL;
- if( (threadmark_mark *)NULL == tarena->first_mark ) {
- tarena->marking_thread = (PRThread *)NULL;
- }
- } else {
- PL_ARENA_RELEASE(arena, mark);
- }
- }
- releaseArenaLock();
- #endif /* THREADMARK */
- }
- char *
- PORT_ArenaStrdup(PLArenaPool *arena, char *str) {
- int len = PORT_Strlen(str)+1;
- char *newstr;
- getArenaLock();
- newstr = (char*)PORT_ArenaAlloc(arena,len);
- releaseArenaLock();
- if (newstr) {
- PORT_Memcpy(newstr,str,len);
- }
- return newstr;
- }
- /********************** end of arena functions ***********************/
- /****************** unicode conversion functions ***********************/
- /*
- * NOTE: These conversion functions all assume that the multibyte
- * characters are going to be in NETWORK BYTE ORDER, not host byte
- * order. This is because the only time we deal with UCS-2 and UCS-4
- * are when the data was received from or is going to be sent out
- * over the wire (in, e.g. certificates).
- */
- void
- PORT_SetUCS4_UTF8ConversionFunction(PORTCharConversionFunc convFunc)
- {
- ucs4Utf8ConvertFunc = convFunc;
- }
- void
- PORT_SetUCS2_ASCIIConversionFunction(PORTCharConversionWSwapFunc convFunc)
- {
- ucs2AsciiConvertFunc = convFunc;
- }
- void
- PORT_SetUCS2_UTF8ConversionFunction(PORTCharConversionFunc convFunc)
- {
- ucs2Utf8ConvertFunc = convFunc;
- }
- PRBool
- PORT_UCS4_UTF8Conversion(PRBool toUnicode, unsigned char *inBuf,
- unsigned int inBufLen, unsigned char *outBuf,
- unsigned int maxOutBufLen, unsigned int *outBufLen)
- {
- if(!ucs4Utf8ConvertFunc) {
- return sec_port_ucs4_utf8_conversion_function(toUnicode,
- inBuf, inBufLen, outBuf, maxOutBufLen, outBufLen);
- }
- return (*ucs4Utf8ConvertFunc)(toUnicode, inBuf, inBufLen, outBuf,
- maxOutBufLen, outBufLen);
- }
- PRBool
- PORT_UCS2_UTF8Conversion(PRBool toUnicode, unsigned char *inBuf,
- unsigned int inBufLen, unsigned char *outBuf,
- unsigned int maxOutBufLen, unsigned int *outBufLen)
- {
- if(!ucs2Utf8ConvertFunc) {
- return sec_port_ucs2_utf8_conversion_function(toUnicode,
- inBuf, inBufLen, outBuf, maxOutBufLen, outBufLen);
- }
- return (*ucs2Utf8ConvertFunc)(toUnicode, inBuf, inBufLen, outBuf,
- maxOutBufLen, outBufLen);
- }
- PRBool
- PORT_UCS2_ASCIIConversion(PRBool toUnicode, unsigned char *inBuf,
- unsigned int inBufLen, unsigned char *outBuf,
- unsigned int maxOutBufLen, unsigned int *outBufLen,
- PRBool swapBytes)
- {
- if(!ucs2AsciiConvertFunc) {
- return PR_FALSE;
- }
- return (*ucs2AsciiConvertFunc)(toUnicode, inBuf, inBufLen, outBuf,
- maxOutBufLen, outBufLen, swapBytes);
- }
- /* Portable putenv. Creates/replaces an environment variable of the form
- * envVarName=envValue
- */
- int
- NSS_PutEnv(const char * envVarName, const char * envValue)
- {
- SECStatus result = SECSuccess;
- #ifdef _WIN32
- PRBool setOK;
- setOK = SetEnvironmentVariable(envVarName, envValue);
- if (!setOK) {
- SET_ERROR_CODE
- result = SECFailure;
- }
- #elif defined(XP_MAC)
- result = SECFailure;
- #else
- char * encoded;
- int putEnvFailed;
- encoded = (char *)PORT_ZAlloc(strlen(envVarName) + 2 + strlen(envValue));
- strcpy(encoded, envVarName);
- strcat(encoded, "=");
- strcat(encoded, envValue);
- putEnvFailed = putenv(encoded); /* adopt. */
- if (putEnvFailed) {
- SET_ERROR_CODE
- result = SECFailure;
- PORT_Free(encoded);
- }
- #endif
- return result;
- }