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-rw-r--r--security/nss/lib/freebl/unix_urandom.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/unix_urandom.c b/security/nss/lib/freebl/unix_urandom.c
new file mode 100644
index 000000000..25e6ad91c
--- /dev/null
+++ b/security/nss/lib/freebl/unix_urandom.c
@@ -0,0 +1,50 @@
+/* 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 <fcntl.h>
+#include <unistd.h>
+#include "secerr.h"
+#include "secrng.h"
+#include "prprf.h"
+
+void
+RNG_SystemInfoForRNG(void)
+{
+ PRUint8 bytes[SYSTEM_RNG_SEED_COUNT];
+ size_t numBytes = RNG_SystemRNG(bytes, SYSTEM_RNG_SEED_COUNT);
+ if (!numBytes) {
+ /* error is set */
+ return;
+ }
+ RNG_RandomUpdate(bytes, numBytes);
+}
+
+size_t
+RNG_SystemRNG(void *dest, size_t maxLen)
+{
+ int fd;
+ int bytes;
+ size_t fileBytes = 0;
+ unsigned char *buffer = dest;
+
+ fd = open("/dev/urandom", O_RDONLY);
+ if (fd < 0) {
+ PORT_SetError(SEC_ERROR_NEED_RANDOM);
+ return 0;
+ }
+ while (fileBytes < maxLen) {
+ bytes = read(fd, buffer, maxLen - fileBytes);
+ if (bytes <= 0) {
+ break;
+ }
+ fileBytes += bytes;
+ buffer += bytes;
+ }
+ (void)close(fd);
+ if (fileBytes != maxLen) {
+ PORT_SetError(SEC_ERROR_NEED_RANDOM);
+ return 0;
+ }
+ return fileBytes;
+}