Changeset 5617

Timestamp:

Jul 4, 2017 11:22:39 AM (7 years ago)

Author:

nanang

Message:

Re #1993: Slight improvement on simple SRTP key generator (when PJ_HAS_SSL_SOCK is not set).

File:

• pjproject/trunk/pjmedia/src/pjmedia/transport_srtp_sdes.c (modified) (1 diff)

pjproject/trunk/pjmedia/src/pjmedia/transport_srtp_sdes.c

@@ -132 +132 @@
             PJ_LOG(3,(THIS_FILE, "Warning: simple random generator is used "
                                  "for generating SRTP key"));
-            for (i=0; i<crypto_suites[cs_idx].cipher_key_len; ++i)
-                key[i] = (char)(pj_rand() & 0xFF);
+            for (i=0; i<crypto_suites[cs_idx].cipher_key_len; ++i) {
+                pj_timestamp ts;
+                if (pj_rand() % 7 < 2)
+                    pj_thread_sleep(pj_rand() % 11);
+                pj_get_timestamp(&ts);
+                key[i] = (char)((pj_rand() + ts.u32.lo) & 0xFF);
+            }
 #endif