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/* 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
/*
* Allow freebl and softoken to be loaded without util or NSPR.
*
* These symbols are overridden once real NSPR, and libutil are attached.
*/
#define _GNU_SOURCE 1
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <sys/time.h>
#include <dlfcn.h>
#include <prio.h>
#include <prlink.h>
#include <prlog.h>
#include <prthread.h>
#include <plstr.h>
#include <prinit.h>
#include <prlock.h>
#include <prmem.h>
#include <prerror.h>
#include <prmon.h>
#include <pratom.h>
#include <prsystem.h>
#include <prinrval.h>
#include <prtime.h>
#include <prcvar.h>
#include <secasn1.h>
#include <secdig.h>
#include <secport.h>
#include <secitem.h>
#include <blapi.h>
#include <assert.h>
#include <private/pprio.h>
/* Android API < 21 doesn't define RTLD_NOLOAD */
#ifndef RTLD_NOLOAD
#define RTLD_NOLOAD 0
#endif
#define FREEBL_NO_WEAK 1
#define WEAK __attribute__((weak))
#ifdef FREEBL_NO_WEAK
/*
* This uses function pointers.
*
* CONS: A separate function is needed to
* fill in the function pointers.
*
* PROS: it works on all platforms.
* it allows for dynamically finding nspr and libutil, even once
* softoken is loaded and running. (NOTE: this may be a problem if
* we switch between the stubs and real NSPR on the fly. NSPR will
* do bad things if passed an _FakeArena to free or allocate from).
*/
#define STUB_DECLARE(ret, fn, args) \
typedef ret(*type_##fn) args; \
static type_##fn ptr_##fn = NULL
#define STUB_SAFE_CALL0(fn) \
if (ptr_##fn) { \
return ptr_##fn(); \
}
#define STUB_SAFE_CALL1(fn, a1) \
if (ptr_##fn) { \
return ptr_##fn(a1); \
}
#define STUB_SAFE_CALL2(fn, a1, a2) \
if (ptr_##fn) { \
return ptr_##fn(a1, a2); \
}
#define STUB_SAFE_CALL3(fn, a1, a2, a3) \
if (ptr_##fn) { \
return ptr_##fn(a1, a2, a3); \
}
#define STUB_SAFE_CALL4(fn, a1, a2, a3, a4) \
if (ptr_##fn) { \
return ptr_##fn(a1, a2, a3, a4); \
}
#define STUB_SAFE_CALL5(fn, a1, a2, a3, a4, a5) \
if (ptr_##fn) { \
return ptr_##fn(a1, a2, a3, a4, a5); \
}
#define STUB_SAFE_CALL6(fn, a1, a2, a3, a4, a5, a6) \
if (ptr_##fn) { \
return ptr_##fn(a1, a2, a3, a4, a5, a6); \
}
#define STUB_FETCH_FUNCTION(fn) \
ptr_##fn = (type_##fn)dlsym(lib, #fn); \
if (ptr_##fn == NULL) { \
return SECFailure; \
}
#else
/*
* this uses the loader weak attribute. it works automatically, but once
* freebl is loaded, the symbols are 'fixed' (later loading of NSPR or
* libutil will not resolve these symbols).
*/
#define STUB_DECLARE(ret, fn, args) \
WEAK extern ret fn args
#define STUB_SAFE_CALL0(fn) \
if (fn) { \
return fn(); \
}
#define STUB_SAFE_CALL1(fn, a1) \
if (fn) { \
return fn(a1); \
}
#define STUB_SAFE_CALL2(fn, a1, a2) \
if (fn) { \
return fn(a1, a2); \
}
#define STUB_SAFE_CALL3(fn, a1, a2, a3) \
if (fn) { \
return fn(a1, a2, a3); \
}
#define STUB_SAFE_CALL4(fn, a1, a2, a3, a4) \
if (fn) { \
return fn(a1, a2, a3, a4); \
}
#define STUB_SAFE_CALL6(fn, a1, a2, a3, a4, a5, a6) \
if (fn) { \
return fn(a1, a2, a3, a4, a5, a6); \
}
#endif
STUB_DECLARE(void *, PORT_Alloc_Util, (size_t len));
STUB_DECLARE(void *, PORT_ArenaAlloc_Util, (PLArenaPool * arena, size_t size));
STUB_DECLARE(void *, PORT_ArenaZAlloc_Util, (PLArenaPool * arena, size_t size));
STUB_DECLARE(void, PORT_Free_Util, (void *ptr));
STUB_DECLARE(void, PORT_FreeArena_Util, (PLArenaPool * arena, PRBool zero));
STUB_DECLARE(int, PORT_GetError_Util, (void));
STUB_DECLARE(PLArenaPool *, PORT_NewArena_Util, (unsigned long chunksize));
STUB_DECLARE(void, PORT_SetError_Util, (int value));
STUB_DECLARE(void *, PORT_ZAlloc_Util, (size_t len));
STUB_DECLARE(void *, PORT_ZAllocAligned_Util, (size_t bytes, size_t alignment, void **mem));
STUB_DECLARE(void *, PORT_ZAllocAlignedOffset_Util, (size_t bytes, size_t alignment, size_t offset));
STUB_DECLARE(void, PORT_ZFree_Util, (void *ptr, size_t len));
STUB_DECLARE(void, PR_Assert, (const char *s, const char *file, PRIntn ln));
STUB_DECLARE(PRStatus, PR_Access, (const char *name, PRAccessHow how));
STUB_DECLARE(PRStatus, PR_CallOnce, (PRCallOnceType * once, PRCallOnceFN func));
STUB_DECLARE(PRStatus, PR_Close, (PRFileDesc * fd));
STUB_DECLARE(void, PR_DestroyLock, (PRLock * lock));
STUB_DECLARE(void, PR_DestroyCondVar, (PRCondVar * cvar));
STUB_DECLARE(void, PR_Free, (void *ptr));
STUB_DECLARE(char *, PR_GetLibraryFilePathname, (const char *name, PRFuncPtr addr));
STUB_DECLARE(PRFileDesc *, PR_ImportPipe, (PROsfd osfd));
STUB_DECLARE(void, PR_Lock, (PRLock * lock));
STUB_DECLARE(PRCondVar *, PR_NewCondVar, (PRLock * lock));
STUB_DECLARE(PRLock *, PR_NewLock, (void));
STUB_DECLARE(PRStatus, PR_NotifyCondVar, (PRCondVar * cvar));
STUB_DECLARE(PRStatus, PR_NotifyAllCondVar, (PRCondVar * cvar));
STUB_DECLARE(PRFileDesc *, PR_Open, (const char *name, PRIntn flags, PRIntn mode));
STUB_DECLARE(PRInt32, PR_Read, (PRFileDesc * fd, void *buf, PRInt32 amount));
STUB_DECLARE(PROffset32, PR_Seek, (PRFileDesc * fd, PROffset32 offset, PRSeekWhence whence));
STUB_DECLARE(PRStatus, PR_Sleep, (PRIntervalTime ticks));
STUB_DECLARE(PRStatus, PR_Unlock, (PRLock * lock));
STUB_DECLARE(PRStatus, PR_WaitCondVar, (PRCondVar * cvar, PRIntervalTime timeout));
STUB_DECLARE(char *, PR_GetEnvSecure, (const char *));
STUB_DECLARE(SECItem *, SECITEM_AllocItem_Util, (PLArenaPool * arena, SECItem *item, unsigned int len));
STUB_DECLARE(SECComparison, SECITEM_CompareItem_Util, (const SECItem *a, const SECItem *b));
STUB_DECLARE(PRBool, SECITEM_ItemsAreEqual_Util, (const SECItem *a, const SECItem *b));
STUB_DECLARE(SECStatus, SECITEM_CopyItem_Util, (PLArenaPool * arena, SECItem *to, const SECItem *from));
STUB_DECLARE(void, SECITEM_FreeItem_Util, (SECItem * zap, PRBool freeit));
STUB_DECLARE(void, SECITEM_ZfreeItem_Util, (SECItem * zap, PRBool freeit));
STUB_DECLARE(SECOidTag, SECOID_FindOIDTag_Util, (const SECItem *oid));
STUB_DECLARE(int, NSS_SecureMemcmp, (const void *a, const void *b, size_t n));
STUB_DECLARE(unsigned int, NSS_SecureMemcmpZero, (const void *mem, size_t n));
STUB_DECLARE(void, NSS_SecureSelect, (void *dest, const void *src0, const void *src1, size_t n, unsigned char b));
#ifndef NSS_FIPS_DISABLED
STUB_DECLARE(PRBool, NSS_GetSystemFIPSEnabled, (void));
#endif
#define PORT_ZNew_stub(type) (type *)PORT_ZAlloc_stub(sizeof(type))
#define PORT_New_stub(type) (type *)PORT_Alloc_stub(sizeof(type))
#define PORT_ZNewArray_stub(type, num) \
(type *)PORT_ZAlloc_stub(sizeof(type) * (num))
#define PORT_ZNewAligned_stub(type, alignment, mem) \
(type *)PORT_ZAllocAlignedOffset_stub(sizeof(type), alignment, offsetof(type, mem))
/*
* NOTE: in order to support hashing only the memory allocation stubs,
* the get library name stubs, and the file io stubs are needed (the latter
* two are for the library verification). The remaining stubs are simply to
* compile. Attempts to use the library for other operations without NSPR
* will most likely fail.
*/
/* memory */
extern void *
PORT_Alloc_stub(size_t len)
{
STUB_SAFE_CALL1(PORT_Alloc_Util, len);
return malloc(len);
}
extern void
PORT_Free_stub(void *ptr)
{
STUB_SAFE_CALL1(PORT_Free_Util, ptr);
return free(ptr);
}
extern void *
PORT_ZAlloc_stub(size_t len)
{
STUB_SAFE_CALL1(PORT_ZAlloc_Util, len);
void *ptr = malloc(len);
if (ptr) {
memset(ptr, 0, len);
}
return ptr;
}
/* aligned_alloc is C11. This is an alternative to get aligned memory. */
extern void *
PORT_ZAllocAligned_stub(size_t bytes, size_t alignment, void **mem)
{
STUB_SAFE_CALL3(PORT_ZAllocAligned_Util, bytes, alignment, mem);
/* This only works if alignement is a power of 2. */
if ((alignment == 0) || (alignment & (alignment - 1))) {
return NULL;
}
size_t x = alignment - 1;
size_t len = (bytes ? bytes : 1) + x;
if (!mem) {
return NULL;
}
/* Always allocate a non-zero amount of bytes */
*mem = malloc(len);
if (!*mem) {
return NULL;
}
memset(*mem, 0, len);
/* We're pretty sure this is non-zero, but let's assure scan-build too. */
void *ret = (void *)(((uintptr_t)*mem + x) & ~(uintptr_t)x);
assert(ret);
return ret;
}
extern void *
PORT_ZAllocAlignedOffset_stub(size_t size, size_t alignment, size_t offset)
{
STUB_SAFE_CALL3(PORT_ZAllocAlignedOffset_Util, size, alignment, offset);
if (offset > size) {
return NULL;
}
void *mem = NULL;
void *v = PORT_ZAllocAligned_stub(size, alignment, &mem);
if (!v) {
return NULL;
}
*((void **)((uintptr_t)v + offset)) = mem;
return v;
}
extern void
PORT_ZFree_stub(void *ptr, size_t len)
{
STUB_SAFE_CALL2(PORT_ZFree_Util, ptr, len);
memset(ptr, 0, len);
return free(ptr);
}
extern void
PR_Free_stub(void *ptr)
{
STUB_SAFE_CALL1(PR_Free, ptr);
return free(ptr);
}
/* we have defensive returns after abort(), which is marked noreturn on some
* platforms, making the compiler legitimately complain. */
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunreachable-code-return"
#endif
/*
* arenas
*
*/
extern PLArenaPool *
PORT_NewArena_stub(unsigned long chunksize)
{
STUB_SAFE_CALL1(PORT_NewArena_Util, chunksize);
abort();
return NULL;
}
extern void *
PORT_ArenaAlloc_stub(PLArenaPool *arena, size_t size)
{
STUB_SAFE_CALL2(PORT_ArenaZAlloc_Util, arena, size);
abort();
return NULL;
}
extern void *
PORT_ArenaZAlloc_stub(PLArenaPool *arena, size_t size)
{
STUB_SAFE_CALL2(PORT_ArenaZAlloc_Util, arena, size);
abort();
return NULL;
}
extern void
PORT_FreeArena_stub(PLArenaPool *arena, PRBool zero)
{
STUB_SAFE_CALL2(PORT_FreeArena_Util, arena, zero);
abort();
}
/* io */
extern PRFileDesc *
PR_Open_stub(const char *name, PRIntn flags, PRIntn mode)
{
int *lfd = NULL;
int fd;
int lflags = 0;
STUB_SAFE_CALL3(PR_Open, name, flags, mode);
if (flags & PR_RDWR) {
lflags = O_RDWR;
} else if (flags & PR_WRONLY) {
lflags = O_WRONLY;
} else {
lflags = O_RDONLY;
}
if (flags & PR_EXCL)
lflags |= O_EXCL;
if (flags & PR_APPEND)
lflags |= O_APPEND;
if (flags & PR_TRUNCATE)
lflags |= O_TRUNC;
fd = open(name, lflags, mode);
if (fd >= 0) {
lfd = PORT_New_stub(int);
if (lfd != NULL) {
*lfd = fd;
} else {
close(fd);
}
}
return (PRFileDesc *)lfd;
}
extern PRFileDesc *
PR_ImportPipe_stub(PROsfd fd)
{
int *lfd = NULL;
STUB_SAFE_CALL1(PR_ImportPipe, fd);
lfd = PORT_New_stub(int);
if (lfd != NULL) {
*lfd = fd;
}
return (PRFileDesc *)lfd;
}
extern PRStatus
PR_Close_stub(PRFileDesc *fd)
{
int *lfd;
STUB_SAFE_CALL1(PR_Close, fd);
lfd = (int *)fd;
close(*lfd);
PORT_Free_stub(lfd);
return PR_SUCCESS;
}
extern PRInt32
PR_Read_stub(PRFileDesc *fd, void *buf, PRInt32 amount)
{
int *lfd;
STUB_SAFE_CALL3(PR_Read, fd, buf, amount);
lfd = (int *)fd;
return read(*lfd, buf, amount);
}
extern PROffset32
PR_Seek_stub(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence)
{
int *lfd;
int lwhence = SEEK_SET;
STUB_SAFE_CALL3(PR_Seek, fd, offset, whence);
lfd = (int *)fd;
switch (whence) {
case PR_SEEK_CUR:
lwhence = SEEK_CUR;
break;
case PR_SEEK_END:
lwhence = SEEK_END;
break;
case PR_SEEK_SET:
break;
}
return lseek(*lfd, offset, lwhence);
}
PRStatus
PR_Access_stub(const char *name, PRAccessHow how)
{
int mode = F_OK;
int rv;
STUB_SAFE_CALL2(PR_Access, name, how);
switch (how) {
case PR_ACCESS_WRITE_OK:
mode = W_OK;
break;
case PR_ACCESS_READ_OK:
mode = R_OK;
break;
/* assume F_OK for all others */
default:
break;
}
rv = access(name, mode);
if (rv == 0) {
return PR_SUCCESS;
}
return PR_FAILURE;
}
/*
* library
*/
extern char *
PR_GetLibraryFilePathname_stub(const char *name, PRFuncPtr addr)
{
Dl_info dli;
char *result;
STUB_SAFE_CALL2(PR_GetLibraryFilePathname, name, addr);
if (dladdr((void *)addr, &dli) == 0) {
return NULL;
}
result = PORT_Alloc_stub(strlen(dli.dli_fname) + 1);
if (result != NULL) {
strcpy(result, dli.dli_fname);
}
return result;
}
#include <errno.h>
/* errors */
extern int
PORT_GetError_stub(void)
{
STUB_SAFE_CALL0(PORT_GetError_Util);
return errno;
}
extern void
PORT_SetError_stub(int value)
{
STUB_SAFE_CALL1(PORT_SetError_Util, value);
errno = value;
}
/* misc */
extern void
PR_Assert_stub(const char *s, const char *file, PRIntn ln)
{
STUB_SAFE_CALL3(PR_Assert, s, file, ln);
fprintf(stderr, "%s line %d: %s\n", file, ln, s);
abort();
}
/* time */
extern PRStatus
PR_Sleep_stub(PRIntervalTime ticks)
{
STUB_SAFE_CALL1(PR_Sleep, ticks);
usleep(ticks * 1000);
return PR_SUCCESS;
}
/* locking */
extern PRLock *
PR_NewLock_stub(void)
{
STUB_SAFE_CALL0(PR_NewLock);
abort();
return NULL;
}
extern PRStatus
PR_Unlock_stub(PRLock *lock)
{
STUB_SAFE_CALL1(PR_Unlock, lock);
abort();
return PR_FAILURE;
}
extern void
PR_Lock_stub(PRLock *lock)
{
STUB_SAFE_CALL1(PR_Lock, lock);
abort();
return;
}
extern void
PR_DestroyLock_stub(PRLock *lock)
{
STUB_SAFE_CALL1(PR_DestroyLock, lock);
abort();
return;
}
extern PRCondVar *
PR_NewCondVar_stub(PRLock *lock)
{
STUB_SAFE_CALL1(PR_NewCondVar, lock);
abort();
return NULL;
}
extern PRStatus
PR_NotifyCondVar_stub(PRCondVar *cvar)
{
STUB_SAFE_CALL1(PR_NotifyCondVar, cvar);
abort();
return PR_FAILURE;
}
extern PRStatus
PR_NotifyAllCondVar_stub(PRCondVar *cvar)
{
STUB_SAFE_CALL1(PR_NotifyAllCondVar, cvar);
abort();
return PR_FAILURE;
}
extern PRStatus
PR_WaitCondVar_stub(PRCondVar *cvar, PRIntervalTime timeout)
{
STUB_SAFE_CALL2(PR_WaitCondVar, cvar, timeout);
abort();
return PR_FAILURE;
}
extern char *
PR_GetEnvSecure_stub(const char *var)
{
STUB_SAFE_CALL1(PR_GetEnvSecure, var);
#ifdef __USE_GNU
return secure_getenv(var);
#else
return getenv(var);
#endif
}
extern void
PR_DestroyCondVar_stub(PRCondVar *cvar)
{
STUB_SAFE_CALL1(PR_DestroyCondVar, cvar);
abort();
return;
}
/*
* NOTE: this presupposes GCC 4.1
*/
extern PRStatus
PR_CallOnce_stub(PRCallOnceType *once, PRCallOnceFN func)
{
STUB_SAFE_CALL2(PR_CallOnce, once, func);
abort();
return PR_FAILURE;
}
/*
* SECITEMS implement Item Utilities
*/
extern void
SECITEM_FreeItem_stub(SECItem *zap, PRBool freeit)
{
STUB_SAFE_CALL2(SECITEM_FreeItem_Util, zap, freeit);
abort();
}
extern SECItem *
SECITEM_AllocItem_stub(PLArenaPool *arena, SECItem *item, unsigned int len)
{
STUB_SAFE_CALL3(SECITEM_AllocItem_Util, arena, item, len);
abort();
return NULL;
}
extern SECComparison
SECITEM_CompareItem_stub(const SECItem *a, const SECItem *b)
{
STUB_SAFE_CALL2(SECITEM_CompareItem_Util, a, b);
abort();
return SECEqual;
}
extern PRBool
SECITEM_ItemsAreEqual_stub(const SECItem *a, const SECItem *b)
{
STUB_SAFE_CALL2(SECITEM_ItemsAreEqual_Util, a, b);
/* two nulls are equal */
if (!a && !b) {
return PR_TRUE;
}
/* only one NULL is not equal */
if (!a || !b) {
return PR_FALSE;
}
/* we know both secitems have been set, now make sure the lengths
* are equal */
if (a->len != b->len) {
return PR_FALSE;
}
/* lengths are equal, safe to verify the data */
if (PORT_Memcmp(a->data, b->data, b->len) != 0) {
return PR_FALSE;
}
return PR_TRUE;
}
extern SECStatus
SECITEM_CopyItem_stub(PLArenaPool *arena, SECItem *to, const SECItem *from)
{
STUB_SAFE_CALL3(SECITEM_CopyItem_Util, arena, to, from);
abort();
return SECFailure;
}
extern SECOidTag
SECOID_FindOIDTag_stub(const SECItem *oid)
{
STUB_SAFE_CALL1(SECOID_FindOIDTag_Util, oid);
abort();
return SEC_OID_UNKNOWN;
}
#ifdef __clang__
#pragma clang diagnostic pop
#endif
extern void
SECITEM_ZfreeItem_stub(SECItem *zap, PRBool freeit)
{
STUB_SAFE_CALL2(SECITEM_ZfreeItem_Util, zap, freeit);
if (zap) {
if (zap->data) {
PORT_Memset(zap->data, 0, zap->len);
PORT_Free_stub(zap->data);
}
PORT_Memset(zap, 0, sizeof(SECItem));
if (freeit) {
PORT_Free_stub(zap);
}
}
}
extern int
NSS_SecureMemcmp_stub(const void *a, const void *b, size_t n)
{
STUB_SAFE_CALL3(NSS_SecureMemcmp, a, b, n);
abort();
}
extern unsigned int
NSS_SecureMemcmpZero_stub(const void *mem, size_t n)
{
STUB_SAFE_CALL2(NSS_SecureMemcmpZero, mem, n);
abort();
}
extern void
NSS_SecureSelect_stub(void *dest, const void *src0, const void *src1, size_t n, unsigned char b)
{
STUB_SAFE_CALL5(NSS_SecureSelect, dest, src0, src1, n, b);
abort();
}
#ifndef NSS_FIPS_DISABLED
PRBool
NSS_GetSystemFIPSEnabled_stub(void)
{
STUB_SAFE_CALL0(NSS_GetSystemFIPSEnabled);
const char *env;
/* The environment variable is active for all platforms */
env = PR_GetEnvSecure_stub("NSS_FIPS");
/* we generally accept y, Y, 1, FIPS, TRUE, and ON as turning on FIPS
* mode. Anything else is considered 'off' */
if (env && (*env == 'y' || *env == '1' || *env == 'Y' ||
(strcasecmp(env, "fips") == 0) ||
(strcasecmp(env, "true") == 0) ||
(strcasecmp(env, "on") == 0))) {
return PR_TRUE;
}
/* currently only Linux has a system FIPS indicator. Add others here
* as they become available/known */
#ifdef LINUX
{
FILE *f;
char d;
size_t size;
f = fopen("/proc/sys/crypto/fips_enabled", "r");
if (!f)
return PR_FALSE;
size = fread(&d, 1, 1, f);
fclose(f);
if (size != 1)
return PR_FALSE;
if (d == '1')
return PR_TRUE;
}
#endif /* LINUX */
return PR_FALSE;
}
#endif /* NSS_FIPS_DISABLED = 0 */
#ifdef FREEBL_NO_WEAK
static const char *nsprLibName = SHLIB_PREFIX "nspr4." SHLIB_SUFFIX;
static const char *nssutilLibName = SHLIB_PREFIX "nssutil3." SHLIB_SUFFIX;
static SECStatus
freebl_InitNSPR(void *lib)
{
STUB_FETCH_FUNCTION(PR_Free);
STUB_FETCH_FUNCTION(PR_Open);
STUB_FETCH_FUNCTION(PR_ImportPipe);
STUB_FETCH_FUNCTION(PR_Close);
STUB_FETCH_FUNCTION(PR_Read);
STUB_FETCH_FUNCTION(PR_Seek);
STUB_FETCH_FUNCTION(PR_GetLibraryFilePathname);
STUB_FETCH_FUNCTION(PR_Assert);
STUB_FETCH_FUNCTION(PR_Access);
STUB_FETCH_FUNCTION(PR_Sleep);
STUB_FETCH_FUNCTION(PR_CallOnce);
STUB_FETCH_FUNCTION(PR_NewCondVar);
STUB_FETCH_FUNCTION(PR_NotifyCondVar);
STUB_FETCH_FUNCTION(PR_NotifyAllCondVar);
STUB_FETCH_FUNCTION(PR_WaitCondVar);
STUB_FETCH_FUNCTION(PR_DestroyCondVar);
STUB_FETCH_FUNCTION(PR_NewLock);
STUB_FETCH_FUNCTION(PR_Unlock);
STUB_FETCH_FUNCTION(PR_Lock);
STUB_FETCH_FUNCTION(PR_DestroyLock);
STUB_FETCH_FUNCTION(PR_GetEnvSecure);
return SECSuccess;
}
static SECStatus
freebl_InitNSSUtil(void *lib)
{
STUB_FETCH_FUNCTION(PORT_Alloc_Util);
STUB_FETCH_FUNCTION(PORT_Free_Util);
STUB_FETCH_FUNCTION(PORT_ZAlloc_Util);
STUB_FETCH_FUNCTION(PORT_ZFree_Util);
STUB_FETCH_FUNCTION(PORT_NewArena_Util);
STUB_FETCH_FUNCTION(PORT_ArenaAlloc_Util);
STUB_FETCH_FUNCTION(PORT_ArenaZAlloc_Util);
STUB_FETCH_FUNCTION(PORT_FreeArena_Util);
STUB_FETCH_FUNCTION(PORT_GetError_Util);
STUB_FETCH_FUNCTION(PORT_SetError_Util);
STUB_FETCH_FUNCTION(SECITEM_FreeItem_Util);
STUB_FETCH_FUNCTION(SECITEM_AllocItem_Util);
STUB_FETCH_FUNCTION(SECITEM_CompareItem_Util);
STUB_FETCH_FUNCTION(SECITEM_CopyItem_Util);
STUB_FETCH_FUNCTION(SECITEM_ZfreeItem_Util);
STUB_FETCH_FUNCTION(SECOID_FindOIDTag_Util);
STUB_FETCH_FUNCTION(NSS_SecureMemcmp);
STUB_FETCH_FUNCTION(NSS_SecureMemcmpZero);
STUB_FETCH_FUNCTION(NSS_SecureSelect);
return SECSuccess;
}
/*
* fetch the library if it's loaded. For NSS it should already be loaded
*/
#define freebl_getLibrary(libName) \
dlopen(libName, RTLD_LAZY | RTLD_NOLOAD)
#define freebl_releaseLibrary(lib) \
if (lib) \
dlclose(lib)
static void *FREEBLnsprGlobalLib = NULL;
static void *FREEBLnssutilGlobalLib = NULL;
void __attribute((destructor)) FREEBL_unload()
{
freebl_releaseLibrary(FREEBLnsprGlobalLib);
freebl_releaseLibrary(FREEBLnssutilGlobalLib);
}
#endif
/*
* load the symbols from the real libraries if available.
*
* if force is set, explicitly load the libraries if they are not already
* loaded. If we could not use the real libraries, return failure.
*/
extern SECStatus
FREEBL_InitStubs()
{
SECStatus rv = SECSuccess;
#ifdef FREEBL_NO_WEAK
void *nspr = NULL;
void *nssutil = NULL;
/* NSPR should be first */
if (!FREEBLnsprGlobalLib) {
nspr = freebl_getLibrary(nsprLibName);
if (!nspr) {
return SECFailure;
}
rv = freebl_InitNSPR(nspr);
if (rv != SECSuccess) {
freebl_releaseLibrary(nspr);
return rv;
}
FREEBLnsprGlobalLib = nspr; /* adopt */
}
/* now load NSSUTIL */
if (!FREEBLnssutilGlobalLib) {
nssutil = freebl_getLibrary(nssutilLibName);
if (!nssutil) {
return SECFailure;
}
rv = freebl_InitNSSUtil(nssutil);
if (rv != SECSuccess) {
freebl_releaseLibrary(nssutil);
return rv;
}
FREEBLnssutilGlobalLib = nssutil; /* adopt */
}
#endif
return rv;
}