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-rw-r--r--security/nss/lib/util/secport.c581
1 files changed, 581 insertions, 0 deletions
diff --git a/security/nss/lib/util/secport.c b/security/nss/lib/util/secport.c
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+++ b/security/nss/lib/util/secport.c
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+/*
+ * 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
+ *
+ * $Id$
+ */
+
+#include "seccomon.h"
+#include "prmem.h"
+#include "prerror.h"
+#include "plarena.h"
+#include "secerr.h"
+#include "prmon.h"
+#include "nsslocks.h"
+#include "secport.h"
+#include "prvrsion.h"
+#include "prenv.h"
+
+#ifdef DEBUG
+#define THREADMARK
+#endif /* DEBUG */
+
+#ifdef THREADMARK
+#include "prthread.h"
+#endif /* THREADMARK */
+
+#if defined(XP_UNIX) || defined(XP_MAC) || defined(XP_OS2) || defined(XP_BEOS)
+#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;
+
+#endif /* THREADMARK */
+
+/* The value of this magic must change each time PORTArenaPool changes. */
+#define ARENAPOOL_MAGIC 0xB8AC9BDF
+
+typedef struct PORTArenaPool_str {
+ PLArenaPool arena;
+ PRUint32 magic;
+ PRLock * lock;
+#ifdef THREADMARK
+ PRThread *marking_thread;
+ threadmark_mark *first_mark;
+#endif
+} PORTArenaPool;
+
+
+/* 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;
+}
+
+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);
+ }
+}
+
+char *
+PORT_Strdup(const char *str)
+{
+ size_t len = PORT_Strlen(str)+1;
+ char *newstr;
+
+ newstr = (char *)PORT_Alloc(len);
+ if (newstr) {
+ PORT_Memcpy(newstr, str, len);
+ }
+ return newstr;
+}
+
+void
+PORT_SetError(int value)
+{
+ PR_SetError(value, 0);
+ return;
+}
+
+int
+PORT_GetError(void)
+{
+ return(PR_GetError());
+}
+
+/********************* Arena code follows *****************************/
+
+PLArenaPool *
+PORT_NewArena(unsigned long chunksize)
+{
+ PORTArenaPool *pool;
+
+ pool = PORT_ZNew(PORTArenaPool);
+ if (!pool) {
+ return NULL;
+ }
+ pool->magic = ARENAPOOL_MAGIC;
+ pool->lock = PZ_NewLock(nssILockArena);
+ if (!pool->lock) {
+ ++port_allocFailures;
+ PORT_Free(pool);
+ return NULL;
+ }
+ PL_InitArenaPool(&pool->arena, "security", chunksize, sizeof(double));
+ return(&pool->arena);
+}
+
+void *
+PORT_ArenaAlloc(PLArenaPool *arena, size_t size)
+{
+ void *p;
+
+ PORTArenaPool *pool = (PORTArenaPool *)arena;
+
+ /* Is it one of ours? Assume so and check the magic */
+ if (ARENAPOOL_MAGIC == pool->magic ) {
+ PZ_Lock(pool->lock);
+#ifdef THREADMARK
+ /* Most likely one of ours. Is there a thread id? */
+ if (pool->marking_thread &&
+ pool->marking_thread != PR_GetCurrentThread() ) {
+ /* Another thread holds a mark in this arena */
+ PZ_Unlock(pool->lock);
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ PORT_Assert(0);
+ return NULL;
+ } /* tid != null */
+#endif /* THREADMARK */
+ PL_ARENA_ALLOCATE(p, arena, size);
+ PZ_Unlock(pool->lock);
+ } else {
+ PL_ARENA_ALLOCATE(p, arena, size);
+ }
+
+ if (!p) {
+ ++port_allocFailures;
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ }
+
+ return(p);
+}
+
+void *
+PORT_ArenaZAlloc(PLArenaPool *arena, size_t size)
+{
+ void *p = PORT_ArenaAlloc(arena, size);
+
+ if (p) {
+ PORT_Memset(p, 0, size);
+ }
+
+ return(p);
+}
+
+/* XXX - need to zeroize!! - jsw */
+void
+PORT_FreeArena(PLArenaPool *arena, PRBool zero)
+{
+ PORTArenaPool *pool = (PORTArenaPool *)arena;
+ PRLock * lock = (PRLock *)0;
+ size_t len = sizeof *arena;
+ extern const PRVersionDescription * libVersionPoint(void);
+ static const PRVersionDescription * pvd;
+ static PRBool doFreeArenaPool = PR_FALSE;
+
+ if (ARENAPOOL_MAGIC == pool->magic ) {
+ len = sizeof *pool;
+ lock = pool->lock;
+ PZ_Lock(lock);
+ }
+ if (!pvd) {
+ /* Each of NSPR's DLLs has a function libVersionPoint().
+ ** We could do a lot of extra work to be sure we're calling the
+ ** one in the DLL that holds PR_FreeArenaPool, but instead we
+ ** rely on the fact that ALL NSPR DLLs in the same directory
+ ** must be from the same release, and we call which ever one we get.
+ */
+ /* no need for thread protection here */
+ pvd = libVersionPoint();
+ if ((pvd->vMajor > 4) ||
+ (pvd->vMajor == 4 && pvd->vMinor > 1) ||
+ (pvd->vMajor == 4 && pvd->vMinor == 1 && pvd->vPatch >= 1)) {
+ const char *ev = PR_GetEnv("NSS_DISABLE_ARENA_FREE_LIST");
+ if (!ev) doFreeArenaPool = PR_TRUE;
+ }
+ }
+ if (doFreeArenaPool) {
+ PL_FreeArenaPool(arena);
+ } else {
+ PL_FinishArenaPool(arena);
+ }
+ PORT_ZFree(arena, len);
+ if (lock) {
+ PZ_Unlock(lock);
+ PZ_DestroyLock(lock);
+ }
+}
+
+void *
+PORT_ArenaGrow(PLArenaPool *arena, void *ptr, size_t oldsize, size_t newsize)
+{
+ PORTArenaPool *pool = (PORTArenaPool *)arena;
+ PORT_Assert(newsize >= oldsize);
+
+ if (ARENAPOOL_MAGIC == pool->magic ) {
+ PZ_Lock(pool->lock);
+ /* Do we do a THREADMARK check here? */
+ PL_ARENA_GROW(ptr, arena, oldsize, ( newsize - oldsize ) );
+ PZ_Unlock(pool->lock);
+ } else {
+ PL_ARENA_GROW(ptr, arena, oldsize, ( newsize - oldsize ) );
+ }
+
+ return(ptr);
+}
+
+void *
+PORT_ArenaMark(PLArenaPool *arena)
+{
+ void * result;
+
+ PORTArenaPool *pool = (PORTArenaPool *)arena;
+ if (ARENAPOOL_MAGIC == pool->magic ) {
+ PZ_Lock(pool->lock);
+#ifdef THREADMARK
+ {
+ threadmark_mark *tm, **pw;
+ PRThread * currentThread = PR_GetCurrentThread();
+
+ if (! pool->marking_thread ) {
+ /* First mark */
+ pool->marking_thread = currentThread;
+ } else if (currentThread != pool->marking_thread ) {
+ PZ_Unlock(pool->lock);
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ PORT_Assert(0);
+ return NULL;
+ }
+
+ result = PL_ARENA_MARK(arena);
+ PL_ARENA_ALLOCATE(tm, arena, sizeof(threadmark_mark));
+ if (!tm) {
+ PZ_Unlock(pool->lock);
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ return NULL;
+ }
+
+ tm->mark = result;
+ tm->next = (threadmark_mark *)NULL;
+
+ pw = &pool->first_mark;
+ while( *pw ) {
+ pw = &(*pw)->next;
+ }
+
+ *pw = tm;
+ }
+#else /* THREADMARK */
+ result = PL_ARENA_MARK(arena);
+#endif /* THREADMARK */
+ PZ_Unlock(pool->lock);
+ } else {
+ /* a "pure" NSPR arena */
+ result = PL_ARENA_MARK(arena);
+ }
+ return result;
+}
+
+void
+PORT_ArenaRelease(PLArenaPool *arena, void *mark)
+{
+ PORTArenaPool *pool = (PORTArenaPool *)arena;
+ if (ARENAPOOL_MAGIC == pool->magic ) {
+ PZ_Lock(pool->lock);
+#ifdef THREADMARK
+ {
+ threadmark_mark **pw, *tm;
+
+ if (PR_GetCurrentThread() != pool->marking_thread ) {
+ PZ_Unlock(pool->lock);
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ PORT_Assert(0);
+ return /* no error indication available */ ;
+ }
+
+ pw = &pool->first_mark;
+ while( *pw && (mark != (*pw)->mark) ) {
+ pw = &(*pw)->next;
+ }
+
+ if (! *pw ) {
+ /* bad mark */
+ PZ_Unlock(pool->lock);
+ 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 (! pool->first_mark ) {
+ pool->marking_thread = (PRThread *)NULL;
+ }
+ }
+#else /* THREADMARK */
+ PL_ARENA_RELEASE(arena, mark);
+#endif /* THREADMARK */
+ PZ_Unlock(pool->lock);
+ } else {
+ PL_ARENA_RELEASE(arena, mark);
+ }
+}
+
+void
+PORT_ArenaUnmark(PLArenaPool *arena, void *mark)
+{
+#ifdef THREADMARK
+ PORTArenaPool *pool = (PORTArenaPool *)arena;
+ if (ARENAPOOL_MAGIC == pool->magic ) {
+ threadmark_mark **pw, *tm;
+
+ PZ_Lock(pool->lock);
+
+ if (PR_GetCurrentThread() != pool->marking_thread ) {
+ PZ_Unlock(pool->lock);
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ PORT_Assert(0);
+ return /* no error indication available */ ;
+ }
+
+ pw = &pool->first_mark;
+ while( ((threadmark_mark *)NULL != *pw) && (mark != (*pw)->mark) ) {
+ pw = &(*pw)->next;
+ }
+
+ if ((threadmark_mark *)NULL == *pw ) {
+ /* bad mark */
+ PZ_Unlock(pool->lock);
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ PORT_Assert(0);
+ return /* no error indication available */ ;
+ }
+
+ tm = *pw;
+ *pw = (threadmark_mark *)NULL;
+
+ if (! pool->first_mark ) {
+ pool->marking_thread = (PRThread *)NULL;
+ }
+
+ PZ_Unlock(pool->lock);
+ }
+#endif /* THREADMARK */
+}
+
+char *
+PORT_ArenaStrdup(PLArenaPool *arena, const char *str) {
+ int len = PORT_Strlen(str)+1;
+ char *newstr;
+
+ newstr = (char*)PORT_ArenaAlloc(arena,len);
+ 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)
+{
+#if defined(XP_MAC) || defined(_WIN32_WCE)
+ return SECFailure;
+#else
+ SECStatus result = SECSuccess;
+ char * encoded;
+ int putEnvFailed;
+#ifdef _WIN32
+ PRBool setOK;
+
+ setOK = SetEnvironmentVariable(envVarName, envValue);
+ if (!setOK) {
+ SET_ERROR_CODE
+ return SECFailure;
+ }
+#endif
+
+ 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);
+ }
+ return result;
+#endif
+}
+
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