New functions SSL[_CTX]_set_msg_callback().

New macros SSL[_CTX]_set_msg_callback_arg().

Message callback imlementation for SSL 3.0/TLS 1.0 (no SSL 2.0 yet).

New '-msg' option for 'openssl s_client' and 'openssl s_server'
that enable a message callback that displays all protocol messages.


In ssl3_get_client_hello (ssl/s3_srvr.c), generate a fatal alert if
client_version is smaller than the protocol version in use.
Also change ssl23_get_client_hello (ssl/s23_srvr.c) to select TLS 1.0
if the client demanded SSL 3.0 but only TLS 1.0 is enabled; then the
client will at least see that alert.

Fix SSL[_CTX]_ctrl prototype (void * instead of char * for generic
pointer).

Add/update some OpenSSL copyright notices.

1 files changed, 37 insertions, 0 deletions

diff --git a/CHANGES b/CHANGES
index b544a62dbf..79ee3c82e4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -12,6 +12,43 @@
          *) applies to 0.9.6a/0.9.6b/0.9.6c and 0.9.7
          +) applies to 0.9.7 only
 
+  +) New functions/macros
+
+          SSL_CTX_set_msg_callback(ctx, cb)
+          SSL_CTX_set_msg_callback_arg(ctx, arg)
+          SSL_set_msg_callback(ssl, cb)
+          SSL_set_msg_callback_arg(ssl, arg)
+
+     to request calling a callback function
+
+          void cb(int write_p, int version, int content_type,
+                  const void *buf, size_t len, SSL *ssl, void *arg)
+
+     whenever a protocol message has been completely received
+     (write_p == 0) or sent (write_p == 1).  Here 'version' is the
+     protocol version  according to which the SSL library interprets
+     the current protocol message (SSL2_VERSION, SSL3_VERSION, or
+     TLS1_VERSION).  'content_type' is 0 in the case of SSL 2.0, or
+     the content type as defined in the SSL 3.0/TLS 1.0 protocol
+     specification (change_cipher_spec(20), alert(21), handshake(22)).
+     'buf' and 'len' point to the actual message, 'ssl' to the
+     SSL object, and 'arg' is the application-defined value set by
+     SSL[_CTX]_set_msg_callback_arg().
+
+     'openssl s_client' and 'openssl s_server' have new '-msg' options
+     to enable a callback that displays all protocol messages.
+
+     TODO: SSL 2.0, doc/ssl/, doc/apps/
+     [Bodo Moeller]
+
+  *) In ssl3_get_client_hello (ssl/s3_srvr.c), generate a fatal alert
+     (sent using the client's version number) if client_version is
+     smaller than the protocol version in use.  Also change
+     ssl23_get_client_hello (ssl/s23_srvr.c) to select TLS 1.0 if
+     the client demanded SSL 3.0 but only TLS 1.0 is enabled; then
+     the client will at least see that alert.
+     [Bodo Moeller]
+
   +) Modify the behaviour of EVP cipher functions in similar way to digests
      to retain compatibility with existing code.
      [Steve Henson]