mozilla-nss/nss-fips-fix-missing-nspr.patch

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diff --git a/nss/lib/freebl/drbg.c b/nss/lib/freebl/drbg.c
index 3ed1751..65fee9a 100644
--- a/nss/lib/freebl/drbg.c
+++ b/nss/lib/freebl/drbg.c
@@ -6,6 +6,8 @@
#include "stubs.h"
#endif
+#include <unistd.h>
+
#include "prerror.h"
#include "secerr.h"
@@ -182,11 +184,30 @@ prng_initEntropy(void)
PRUint8 block[PRNG_ENTROPY_BLOCK_SIZE];
SHA256Context ctx;
+ /* Don't have NSPR, so can't use the real PR_CallOnce. Implement a stripped
+ * down version. This is similar to freebl_RunLoaderOnce(). */
+ if (coRNGInitEntropy.initialized) {
+ return coRNGInitEntropy.status;
+ }
+ if (__sync_lock_test_and_set(&coRNGInitEntropy.inProgress, 1) != 0) {
+ /* Shouldn't have a lot of takers here, which is good
+ * since we don't have condition variables yet.
+ * 'initialized' only ever gets set (not cleared) so we don't
+ * need the traditional locks. */
+ while (!coRNGInitEntropy.initialized) {
+ sleep(1); /* don't have condition variables, just give up the CPU */
+ }
+ return coRNGInitEntropy.status;
+ }
+
/* For FIPS 140-2 4.9.2 continuous random number generator test,
* fetch the initial entropy from the system RNG and keep it for
* later comparison. */
length = RNG_SystemRNG(block, sizeof(block));
if (length == 0) {
+ coRNGInitEntropy.status = PR_FAILURE;
+ __sync_synchronize ();
+ coRNGInitEntropy.initialized = 1;
return PR_FAILURE; /* error is already set */
}
PORT_Assert(length == sizeof(block));
@@ -199,6 +220,10 @@ prng_initEntropy(void)
sizeof(globalrng->previousEntropyHash));
PORT_Memset(block, 0, sizeof(block));
SHA256_DestroyContext(&ctx, PR_FALSE);
+
+ coRNGInitEntropy.status = PR_SUCCESS;
+ __sync_synchronize ();
+ coRNGInitEntropy.initialized = 1;
return PR_SUCCESS;
}
@@ -211,7 +236,7 @@ prng_getEntropy(PRUint8 *buffer, size_t requestLength)
SHA256Context ctx;
SECStatus rv = SECSuccess;
- if (PR_CallOnce(&coRNGInitEntropy, prng_initEntropy) != PR_SUCCESS) {
+ if (prng_initEntropy () != PR_SUCCESS) {
PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
return SECFailure;
}
@@ -842,7 +867,21 @@ PRNGTEST_Generate(PRUint8 *bytes, unsigned int bytes_len,
}
/* replicate reseed test from prng_GenerateGlobalRandomBytes */
if (testContext.reseed_counter[0] >= RESEED_VALUE) {
- rv = prng_reseed(&testContext, NULL, 0, NULL, 0);
+ /* We need to supply the entropy so as to avoid use of global RNG */
+ static const PRUint8 reseed_entropy[] = {
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ };
+ static const PRUint8 additional_input[] = {
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ };
+ rv = prng_reseed(&testContext, reseed_entropy, sizeof reseed_entropy,
+ additional_input, sizeof additional_input);
if (rv != SECSuccess) {
return rv;
}