mirror of
https://github.com/classilla/tenfourfox.git
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717 lines
18 KiB
C
717 lines
18 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* secport.c - portability interfaces for security libraries
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*
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* This file abstracts out libc functionality that libsec depends on
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*
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* NOTE - These are not public interfaces
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*/
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#include "seccomon.h"
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#include "prmem.h"
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#include "prerror.h"
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#include "plarena.h"
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#include "secerr.h"
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#include "prmon.h"
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#include "nssilock.h"
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#include "secport.h"
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#include "prenv.h"
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#ifdef DEBUG
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#define THREADMARK
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#endif /* DEBUG */
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#ifdef THREADMARK
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#include "prthread.h"
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#endif /* THREADMARK */
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#if defined(XP_UNIX) || defined(XP_OS2) || defined(XP_BEOS)
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#include <stdlib.h>
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#else
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#include "wtypes.h"
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#endif
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#define SET_ERROR_CODE /* place holder for code to set PR error code. */
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#ifdef THREADMARK
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typedef struct threadmark_mark_str {
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struct threadmark_mark_str *next;
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void *mark;
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} threadmark_mark;
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#endif /* THREADMARK */
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/* The value of this magic must change each time PORTArenaPool changes. */
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#define ARENAPOOL_MAGIC 0xB8AC9BDF
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typedef struct PORTArenaPool_str {
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PLArenaPool arena;
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PRUint32 magic;
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PRLock * lock;
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#ifdef THREADMARK
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PRThread *marking_thread;
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threadmark_mark *first_mark;
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#endif
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} PORTArenaPool;
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/* count of allocation failures. */
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unsigned long port_allocFailures;
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/* locations for registering Unicode conversion functions.
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* XXX is this the appropriate location? or should they be
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* moved to client/server specific locations?
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*/
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PORTCharConversionFunc ucs4Utf8ConvertFunc;
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PORTCharConversionFunc ucs2Utf8ConvertFunc;
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PORTCharConversionWSwapFunc ucs2AsciiConvertFunc;
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/* NSPR memory allocation functions (PR_Malloc, PR_Calloc, and PR_Realloc)
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* use the PRUint32 type for the size parameter. Before we pass a size_t or
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* unsigned long size to these functions, we need to ensure it is <= half of
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* the maximum PRUint32 value to avoid truncation and catch a negative size.
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*/
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#define MAX_SIZE (PR_UINT32_MAX >> 1)
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void *
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PORT_Alloc(size_t bytes)
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{
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void *rv = NULL;
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if (bytes <= MAX_SIZE) {
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/* Always allocate a non-zero amount of bytes */
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rv = PR_Malloc(bytes ? bytes : 1);
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}
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if (!rv) {
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++port_allocFailures;
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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return rv;
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}
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void *
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PORT_Realloc(void *oldptr, size_t bytes)
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{
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void *rv = NULL;
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if (bytes <= MAX_SIZE) {
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rv = PR_Realloc(oldptr, bytes);
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}
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if (!rv) {
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++port_allocFailures;
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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return rv;
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}
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void *
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PORT_ZAlloc(size_t bytes)
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{
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void *rv = NULL;
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if (bytes <= MAX_SIZE) {
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/* Always allocate a non-zero amount of bytes */
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rv = PR_Calloc(1, bytes ? bytes : 1);
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}
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if (!rv) {
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++port_allocFailures;
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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return rv;
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}
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void
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PORT_Free(void *ptr)
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{
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if (ptr) {
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PR_Free(ptr);
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}
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}
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void
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PORT_ZFree(void *ptr, size_t len)
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{
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if (ptr) {
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memset(ptr, 0, len);
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PR_Free(ptr);
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}
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}
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char *
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PORT_Strdup(const char *str)
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{
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size_t len = PORT_Strlen(str)+1;
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char *newstr;
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newstr = (char *)PORT_Alloc(len);
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if (newstr) {
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PORT_Memcpy(newstr, str, len);
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}
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return newstr;
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}
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void
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PORT_SetError(int value)
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{
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#ifdef DEBUG_jp96085
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PORT_Assert(value != SEC_ERROR_REUSED_ISSUER_AND_SERIAL);
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#endif
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PR_SetError(value, 0);
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return;
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}
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int
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PORT_GetError(void)
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{
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return(PR_GetError());
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}
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/********************* Arena code follows *****************************
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* ArenaPools are like heaps. The memory in them consists of large blocks,
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* called arenas, which are allocated from the/a system heap. Inside an
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* ArenaPool, the arenas are organized as if they were in a stack. Newly
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* allocated arenas are "pushed" on that stack. When you attempt to
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* allocate memory from an ArenaPool, the code first looks to see if there
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* is enough unused space in the top arena on the stack to satisfy your
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* request, and if so, your request is satisfied from that arena.
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* Otherwise, a new arena is allocated (or taken from NSPR's list of freed
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* arenas) and pushed on to the stack. The new arena is always big enough
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* to satisfy the request, and is also at least a minimum size that is
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* established at the time that the ArenaPool is created.
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*
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* The ArenaMark function returns the address of a marker in the arena at
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* the top of the arena stack. It is the address of the place in the arena
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* on the top of the arena stack from which the next block of memory will
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* be allocated. Each ArenaPool has its own separate stack, and hence
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* marks are only relevant to the ArenaPool from which they are gotten.
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* Marks may be nested. That is, a thread can get a mark, and then get
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* another mark.
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*
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* It is intended that all the marks in an ArenaPool may only be owned by a
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* single thread. In DEBUG builds, this is enforced. In non-DEBUG builds,
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* it is not. In DEBUG builds, when a thread gets a mark from an
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* ArenaPool, no other thread may acquire a mark in that ArenaPool while
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* that mark exists, that is, until that mark is unmarked or released.
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* Therefore, it is important that every mark be unmarked or released when
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* the creating thread has no further need for exclusive ownership of the
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* right to manage the ArenaPool.
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*
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* The ArenaUnmark function discards the ArenaMark at the address given,
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* and all marks nested inside that mark (that is, acquired from that same
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* ArenaPool while that mark existed). It is an error for a thread other
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* than the mark's creator to try to unmark it. When a thread has unmarked
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* all its marks from an ArenaPool, then another thread is able to set
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* marks in that ArenaPool. ArenaUnmark does not deallocate (or "pop") any
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* memory allocated from the ArenaPool since the mark was created.
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*
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* ArenaRelease "pops" the stack back to the mark, deallocating all the
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* memory allocated from the arenas in the ArenaPool since that mark was
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* created, and removing any arenas from the ArenaPool that have no
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* remaining active allocations when that is done. It implicitly releases
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* any marks nested inside the mark being explicitly released. It is the
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* only operation, other than destroying the arenapool, that potentially
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* reduces the number of arenas on the stack. Otherwise, the stack grows
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* until the arenapool is destroyed, at which point all the arenas are
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* freed or returned to a "free arena list", depending on their sizes.
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*/
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PLArenaPool *
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PORT_NewArena(unsigned long chunksize)
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{
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PORTArenaPool *pool;
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if (chunksize > MAX_SIZE) {
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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return NULL;
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}
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pool = PORT_ZNew(PORTArenaPool);
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if (!pool) {
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return NULL;
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}
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pool->magic = ARENAPOOL_MAGIC;
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pool->lock = PZ_NewLock(nssILockArena);
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if (!pool->lock) {
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++port_allocFailures;
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PORT_Free(pool);
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return NULL;
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}
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PL_InitArenaPool(&pool->arena, "security", chunksize, sizeof(double));
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return(&pool->arena);
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}
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void *
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PORT_ArenaAlloc(PLArenaPool *arena, size_t size)
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{
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void *p = NULL;
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PORTArenaPool *pool = (PORTArenaPool *)arena;
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if (size <= 0) {
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size = 1;
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}
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if (size > MAX_SIZE) {
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/* you lose. */
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} else
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/* Is it one of ours? Assume so and check the magic */
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if (ARENAPOOL_MAGIC == pool->magic ) {
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PZ_Lock(pool->lock);
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#ifdef THREADMARK
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/* Most likely one of ours. Is there a thread id? */
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if (pool->marking_thread &&
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pool->marking_thread != PR_GetCurrentThread() ) {
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/* Another thread holds a mark in this arena */
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PZ_Unlock(pool->lock);
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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PORT_Assert(0);
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return NULL;
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} /* tid != null */
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#endif /* THREADMARK */
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PL_ARENA_ALLOCATE(p, arena, size);
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PZ_Unlock(pool->lock);
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} else {
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PL_ARENA_ALLOCATE(p, arena, size);
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}
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if (!p) {
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++port_allocFailures;
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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return(p);
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}
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void *
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PORT_ArenaZAlloc(PLArenaPool *arena, size_t size)
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{
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void *p;
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if (size <= 0)
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size = 1;
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p = PORT_ArenaAlloc(arena, size);
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if (p) {
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PORT_Memset(p, 0, size);
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}
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return(p);
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}
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/*
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* If zero is true, zeroize the arena memory before freeing it.
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*/
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void
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PORT_FreeArena(PLArenaPool *arena, PRBool zero)
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{
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PORTArenaPool *pool = (PORTArenaPool *)arena;
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PRLock * lock = (PRLock *)0;
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size_t len = sizeof *arena;
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static PRBool checkedEnv = PR_FALSE;
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static PRBool doFreeArenaPool = PR_FALSE;
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if (!pool)
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return;
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if (ARENAPOOL_MAGIC == pool->magic ) {
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len = sizeof *pool;
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lock = pool->lock;
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PZ_Lock(lock);
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}
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if (!checkedEnv) {
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/* no need for thread protection here */
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doFreeArenaPool = (PR_GetEnv("NSS_DISABLE_ARENA_FREE_LIST") == NULL);
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checkedEnv = PR_TRUE;
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}
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if (zero) {
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PL_ClearArenaPool(arena, 0);
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}
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if (doFreeArenaPool) {
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PL_FreeArenaPool(arena);
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} else {
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PL_FinishArenaPool(arena);
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}
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PORT_ZFree(arena, len);
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if (lock) {
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PZ_Unlock(lock);
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PZ_DestroyLock(lock);
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}
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}
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void *
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PORT_ArenaGrow(PLArenaPool *arena, void *ptr, size_t oldsize, size_t newsize)
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{
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PORTArenaPool *pool = (PORTArenaPool *)arena;
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PORT_Assert(newsize >= oldsize);
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if (newsize > MAX_SIZE) {
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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return NULL;
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}
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if (ARENAPOOL_MAGIC == pool->magic ) {
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PZ_Lock(pool->lock);
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/* Do we do a THREADMARK check here? */
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PL_ARENA_GROW(ptr, arena, oldsize, ( newsize - oldsize ) );
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PZ_Unlock(pool->lock);
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} else {
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PL_ARENA_GROW(ptr, arena, oldsize, ( newsize - oldsize ) );
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}
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return(ptr);
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}
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void *
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PORT_ArenaMark(PLArenaPool *arena)
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{
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void * result;
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PORTArenaPool *pool = (PORTArenaPool *)arena;
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if (ARENAPOOL_MAGIC == pool->magic ) {
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PZ_Lock(pool->lock);
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#ifdef THREADMARK
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{
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threadmark_mark *tm, **pw;
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PRThread * currentThread = PR_GetCurrentThread();
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if (! pool->marking_thread ) {
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/* First mark */
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pool->marking_thread = currentThread;
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} else if (currentThread != pool->marking_thread ) {
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PZ_Unlock(pool->lock);
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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PORT_Assert(0);
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return NULL;
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}
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result = PL_ARENA_MARK(arena);
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PL_ARENA_ALLOCATE(tm, arena, sizeof(threadmark_mark));
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if (!tm) {
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PZ_Unlock(pool->lock);
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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return NULL;
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}
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tm->mark = result;
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tm->next = (threadmark_mark *)NULL;
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pw = &pool->first_mark;
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while( *pw ) {
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pw = &(*pw)->next;
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}
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*pw = tm;
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}
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#else /* THREADMARK */
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result = PL_ARENA_MARK(arena);
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#endif /* THREADMARK */
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PZ_Unlock(pool->lock);
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} else {
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/* a "pure" NSPR arena */
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result = PL_ARENA_MARK(arena);
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}
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return result;
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}
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/*
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* This function accesses the internals of PLArena, which is why it needs
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* to use the NSPR internal macro PL_MAKE_MEM_UNDEFINED before the memset
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* calls.
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*
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* We should move this function to NSPR as PL_ClearArenaAfterMark or add
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* a PL_ARENA_CLEAR_AND_RELEASE macro.
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*
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* TODO: remove the #ifdef PL_MAKE_MEM_UNDEFINED tests when NSPR 4.10+ is
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* widely available.
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*/
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static void
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port_ArenaZeroAfterMark(PLArenaPool *arena, void *mark)
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{
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PLArena *a = arena->current;
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if (a->base <= (PRUword)mark && (PRUword)mark <= a->avail) {
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/* fast path: mark falls in the current arena */
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#ifdef PL_MAKE_MEM_UNDEFINED
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PL_MAKE_MEM_UNDEFINED(mark, a->avail - (PRUword)mark);
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#endif
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memset(mark, 0, a->avail - (PRUword)mark);
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} else {
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/* slow path: need to find the arena that mark falls in */
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for (a = arena->first.next; a; a = a->next) {
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PR_ASSERT(a->base <= a->avail && a->avail <= a->limit);
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if (a->base <= (PRUword)mark && (PRUword)mark <= a->avail) {
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#ifdef PL_MAKE_MEM_UNDEFINED
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PL_MAKE_MEM_UNDEFINED(mark, a->avail - (PRUword)mark);
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#endif
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memset(mark, 0, a->avail - (PRUword)mark);
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a = a->next;
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break;
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}
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}
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for (; a; a = a->next) {
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PR_ASSERT(a->base <= a->avail && a->avail <= a->limit);
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#ifdef PL_MAKE_MEM_UNDEFINED
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PL_MAKE_MEM_UNDEFINED((void *)a->base, a->avail - a->base);
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#endif
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memset((void *)a->base, 0, a->avail - a->base);
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}
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}
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}
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static void
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port_ArenaRelease(PLArenaPool *arena, void *mark, PRBool zero)
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{
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PORTArenaPool *pool = (PORTArenaPool *)arena;
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if (ARENAPOOL_MAGIC == pool->magic ) {
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PZ_Lock(pool->lock);
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#ifdef THREADMARK
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{
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threadmark_mark **pw;
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if (PR_GetCurrentThread() != pool->marking_thread ) {
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PZ_Unlock(pool->lock);
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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PORT_Assert(0);
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return /* no error indication available */ ;
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}
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pw = &pool->first_mark;
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while( *pw && (mark != (*pw)->mark) ) {
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pw = &(*pw)->next;
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}
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if (! *pw ) {
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/* bad mark */
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PZ_Unlock(pool->lock);
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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PORT_Assert(0);
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return /* no error indication available */ ;
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}
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*pw = (threadmark_mark *)NULL;
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if (zero) {
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port_ArenaZeroAfterMark(arena, mark);
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}
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PL_ARENA_RELEASE(arena, mark);
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if (! pool->first_mark ) {
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pool->marking_thread = (PRThread *)NULL;
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}
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}
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#else /* THREADMARK */
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if (zero) {
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port_ArenaZeroAfterMark(arena, mark);
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}
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PL_ARENA_RELEASE(arena, mark);
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#endif /* THREADMARK */
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PZ_Unlock(pool->lock);
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} else {
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if (zero) {
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port_ArenaZeroAfterMark(arena, mark);
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}
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PL_ARENA_RELEASE(arena, mark);
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}
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}
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void
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PORT_ArenaRelease(PLArenaPool *arena, void *mark)
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{
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port_ArenaRelease(arena, mark, PR_FALSE);
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}
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/*
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* Zeroize the arena memory before releasing it.
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*/
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void
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PORT_ArenaZRelease(PLArenaPool *arena, void *mark)
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{
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port_ArenaRelease(arena, mark, PR_TRUE);
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}
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void
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PORT_ArenaUnmark(PLArenaPool *arena, void *mark)
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{
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#ifdef THREADMARK
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PORTArenaPool *pool = (PORTArenaPool *)arena;
|
|
if (ARENAPOOL_MAGIC == pool->magic ) {
|
|
threadmark_mark **pw;
|
|
|
|
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 */ ;
|
|
}
|
|
|
|
*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_ISO88591_UTF8Conversion(const unsigned char *inBuf,
|
|
unsigned int inBufLen, unsigned char *outBuf,
|
|
unsigned int maxOutBufLen, unsigned int *outBufLen)
|
|
{
|
|
return sec_port_iso88591_utf8_conversion_function(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;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Perform a constant-time compare of two memory regions. The return value is
|
|
* 0 if the memory regions are equal and non-zero otherwise.
|
|
*/
|
|
int
|
|
NSS_SecureMemcmp(const void *ia, const void *ib, size_t n)
|
|
{
|
|
const unsigned char *a = (const unsigned char*) ia;
|
|
const unsigned char *b = (const unsigned char*) ib;
|
|
size_t i;
|
|
unsigned char r = 0;
|
|
|
|
for (i = 0; i < n; ++i) {
|
|
r |= *a++ ^ *b++;
|
|
}
|
|
|
|
return r;
|
|
}
|