Changeset 5c09dbbad9c76ea76d7060b0fee10b7d3c8abb3a

Timestamp:

03/10/07 21:08:33 (1 year ago)

Author:

Rémi Denis-Courmont <rem@videolan.org>

git-committer:

Rémi Denis-Courmont <rem@videolan.org> 1173557313 +0000

git-parent:

[54a4638723464f86744b43be273474367a131891]

git-author:

Rémi Denis-Courmont <rem@videolan.org> 1173557313 +0000

Message:

Maintain the SRTCP index
This is not very useful at the moment, but will be needed for proper
replay attack protection

Files:

• libs/srtp/srtp.c (modified) (2 diffs)

libs/srtp/srtp.c

@@ -652 +652 @@
-    memcpy (buf + len, tag, s->tag_len);
-    *lenp = len + s->tag_len;
+    s->rtcp_index++; /* Update index */
-    return 0;
-}
@@ -683 +684 @@
-
-    len -= 4; /* Remove SRTCP index before decryption */
+    uint32_t index;
+    memcpy (&index, buf + len, 4);
+    index = ntohl (index);
+    if (((index - s->rtcp_index) & 0xffffffff) < 0x80000000)
+        s->rtcp_index = index; /* Update index */
+
-    *lenp = len;
-
-    return srtp_crypt (s, buf, len);
-}