Pull the code that builds a DTLS sequence number out into its own function

to avoid duplication. Also use fewer magic numbers.

ok miod@

1 files changed, 14 insertions, 1 deletions

diff --git a/src/lib/libssl/d1_lib.c b/src/lib/libssl/d1_lib.c
index 13c93a77cf..b90cc8eed3 100644
--- a/src/lib/libssl/d1_lib.c
+++ b/src/lib/libssl/d1_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: d1_lib.c,v 1.20 2014/06/13 04:29:13 miod Exp $ */
+/* $OpenBSD: d1_lib.c,v 1.21 2014/06/21 17:02:25 jsing Exp $ */
 /* 
  * DTLS implementation written by Nagendra Modadugu
  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
@@ -460,3 +460,16 @@ dtls1_listen(SSL *s, struct sockaddr *client)
         (void)BIO_dgram_get_peer(SSL_get_rbio(s), client);
         return 1;
 }
+
+void
+dtls1_build_sequence_number(unsigned char *dst, unsigned char *seq,
+    unsigned short epoch)
+{
+        unsigned char dtlsseq[SSL3_SEQUENCE_SIZE];
+        unsigned char *p;
+
+        p = dtlsseq;
+        s2n(epoch, p);
+        memcpy(p, &seq[2], SSL3_SEQUENCE_SIZE - 2);
+        memcpy(dst, dtlsseq, SSL3_SEQUENCE_SIZE);
+}