diff options
Diffstat (limited to 'security/nss/lib/freebl/det_rng.c')
| -rw-r--r-- | security/nss/lib/freebl/det_rng.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/security/nss/lib/freebl/det_rng.c b/security/nss/lib/freebl/det_rng.c index 04fce30e8..53d48bc7c 100644 --- a/security/nss/lib/freebl/det_rng.c +++ b/security/nss/lib/freebl/det_rng.c @@ -8,19 +8,22 @@ #include "nssilock.h" #include "seccomon.h" #include "secerr.h" +#include "prinit.h" #define GLOBAL_BYTES_SIZE 100 static PRUint8 globalBytes[GLOBAL_BYTES_SIZE]; static unsigned long globalNumCalls = 0; static PZLock *rng_lock = NULL; +static PRCallOnceType coRNGInit; +static const PRCallOnceType pristineCallOnce; -SECStatus -RNG_RNGInit(void) +static PRStatus +rng_init(void) { rng_lock = PZ_NewLock(nssILockOther); if (!rng_lock) { PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; + return PR_FAILURE; } /* --- LOCKED --- */ PZ_Lock(rng_lock); @@ -28,6 +31,17 @@ RNG_RNGInit(void) PZ_Unlock(rng_lock); /* --- UNLOCKED --- */ + return PR_SUCCESS; +} + +SECStatus +RNG_RNGInit(void) +{ + /* Allow only one call to initialize the context */ + if (PR_CallOnce(&coRNGInit, rng_init) != PR_SUCCESS) { + return SECFailure; + } + return SECSuccess; } @@ -97,8 +111,11 @@ RNG_GenerateGlobalRandomBytes(void *dest, size_t len) void RNG_RNGShutdown(void) { - PZ_DestroyLock(rng_lock); - rng_lock = NULL; + if (rng_lock) { + PZ_DestroyLock(rng_lock); + rng_lock = NULL; + } + coRNGInit = pristineCallOnce; } /* Test functions are not implemented! */ |