diff -r 000000000000 -r 6474c204b198 media/webrtc/signaling/src/sipcc/plat/unix-common/random.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/webrtc/signaling/src/sipcc/plat/unix-common/random.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,76 @@
+/* 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 <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <syslog.h>
+#include <inttypes.h>
+
+/**
+ * platGenerateCryptoRand
+ * @brief Generates a Random Number
+ *
+ * Generate crypto graphically random number for a desired length.
+ * The function uses "secd" 's provided API. The random bytes are
+ * generated by "secd" which runs as another process. The function
+ * will be much slower than the cpr_rand(). This function should be
+ * used when good random number is needed such as random number that
+ * to be used for SRTP key for an example.
+ *
+ * @param[in] buf  - pointer to the buffer to store the result of random
+ *                   bytes requested.
+ * @param[in] len  - pointer to the length of the desired random bytes.
+ *             When calling the function, the integer's value
+ *             should be set to the desired number of random
+ *             bytes ('buf' should be of at least this size).
+ *             upon success, its value will be set to the
+ *             actual number of random bytes being returned.
+ *             (realistically, there is a maximum number of
+ *             random bytes that can be returned at a time.
+ *             if the caller request more than that, the
+ *             'len' will indicate how many bytes are actually being
+ *             returned) on failure, its value will be set to 0.
+ *
+ * @return
+ *     1 - success.
+ *     0 - fail.
+ *
+ * @note This function MUST BE REWRITTEN BY THE VENDORS
+ * @note The intent of this function is to generate a cryptographically strong
+ * random number. Vendors can map this to HandyIron or OpenSSL random number
+ * generation functions.
+ */
+int
+platGenerateCryptoRand(uint8_t *buf, int *len)
+{
+    int fd;
+    int rc = 0;
+    ssize_t s;
+
+    if ((fd = open("/dev/urandom", O_RDONLY)) == -1) {
+        syslog(LOG_ERR, "Failed to open prng driver");
+        return 0;
+    }
+
+    /*
+     * Try to read the given amount of bytes from the PRNG device.  We do not
+     * handle short reads but just return the number of bytes read from the
+     * device.  The caller has to manage this.
+     * E.g. gsmsdp_generate_key() in core/gsm/gsm_sdp_crypto.c
+     */
+    s = read(fd, buf, (size_t) *len);
+
+    if (s > 0) {
+        *len = s;
+        rc = 1; /* Success */
+    } else {
+        *len = 0;
+        rc = 0; /* Failure */
+    }
+
+    (void) close(fd);
+    return rc;
+}
+