diff options
Diffstat (limited to 'security/nss/lib/freebl/stubs.c')
| -rw-r--r-- | security/nss/lib/freebl/stubs.c | 711 |
1 files changed, 711 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/stubs.c b/security/nss/lib/freebl/stubs.c new file mode 100644 index 000000000..8e0784935 --- /dev/null +++ b/security/nss/lib/freebl/stubs.c @@ -0,0 +1,711 @@ +/* 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/. */ + +/* + * 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 <private/pprio.h> + +#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_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_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(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)); + +#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)) + +/* + * 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; +} + +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); +} + +/* + * 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); + abort(); + return NULL; +} + +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 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; +} + +extern void +SECITEM_ZfreeItem_stub(SECItem *zap, PRBool freeit) +{ + STUB_SAFE_CALL2(SECITEM_ZfreeItem_Util, zap, freeit); + abort(); +} + +extern int +NSS_SecureMemcmp_stub(const void *a, const void *b, size_t n) +{ + STUB_SAFE_CALL3(NSS_SecureMemcmp, a, b, n); + abort(); +} + +#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); + 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; +} |