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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /security/nss/lib/freebl/det_rng.c
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'security/nss/lib/freebl/det_rng.c')
-rw-r--r--security/nss/lib/freebl/det_rng.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/det_rng.c b/security/nss/lib/freebl/det_rng.c
new file mode 100644
index 000000000..fcbf9b34a
--- /dev/null
+++ b/security/nss/lib/freebl/det_rng.c
@@ -0,0 +1,67 @@
+/* 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/. */
+
+#include "blapi.h"
+#include "blapit.h"
+#include "chacha20.h"
+#include "nssilock.h"
+#include "seccomon.h"
+#include "secerr.h"
+
+static unsigned long globalNumCalls = 0;
+
+SECStatus
+prng_ResetForFuzzing(PZLock *rng_lock)
+{
+ /* Check for a valid RNG lock. */
+ PORT_Assert(rng_lock != NULL);
+ if (rng_lock == NULL) {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+
+ /* --- LOCKED --- */
+ PZ_Lock(rng_lock);
+ globalNumCalls = 0;
+ PZ_Unlock(rng_lock);
+ /* --- UNLOCKED --- */
+
+ return SECSuccess;
+}
+
+SECStatus
+prng_GenerateDeterministicRandomBytes(PZLock *rng_lock, void *dest, size_t len)
+{
+ static const uint8_t key[32];
+ uint8_t nonce[12] = { 0 };
+
+ /* Check for a valid RNG lock. */
+ PORT_Assert(rng_lock != NULL);
+ if (rng_lock == NULL) {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+
+ /* --- LOCKED --- */
+ PZ_Lock(rng_lock);
+
+ memcpy(nonce, &globalNumCalls, sizeof(globalNumCalls));
+ globalNumCalls++;
+
+ ChaCha20Poly1305Context *cx =
+ ChaCha20Poly1305_CreateContext(key, sizeof(key), 16);
+ if (!cx) {
+ PORT_SetError(SEC_ERROR_NO_MEMORY);
+ PZ_Unlock(rng_lock);
+ return SECFailure;
+ }
+
+ memset(dest, 0, len);
+ ChaCha20XOR(dest, dest, len, key, nonce, 0);
+ ChaCha20Poly1305_DestroyContext(cx, PR_TRUE);
+
+ PZ_Unlock(rng_lock);
+ /* --- UNLOCKED --- */
+ return SECSuccess;
+}