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Fix downgrading from TLS v1.3 to TLS v1.2

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Fix handling of ServerHello in TLS v1.3 to support TLS v1.2 when
downgrading.
Added support in client and server examples for using downgrade method:
wolfSSLv23_client_method_ex() or wolfSSLv23_server_method_ex().
Add tests, using downgrade version, of client or server downgrading from
TLS v1.3 to TLS v1.2.
This commit is contained in:
Sean Parkinson
2018-02-22 11:05:58 +10:00
parent dc4edd0cd9
commit da4024b46a
8 changed files with 141 additions and 32 deletions
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examples/server/server.c
+8
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@@ -643,6 +643,10 @@ THREAD_RETURN CYASSL_THREAD server_test(void* args)
break;
case 'v' :
if (myoptarg[0] == 'd') {
version = SERVER_DOWNGRADE_VERSION;
break;
}
version = atoi(myoptarg);
if (version < 0 || version > 4) {
Usage();
@@ -893,6 +897,10 @@ THREAD_RETURN CYASSL_THREAD server_test(void* args)
method = wolfTLSv1_3_server_method_ex;
break;
#endif
case SERVER_DOWNGRADE_VERSION:
method = wolfSSLv23_server_method_ex;
break;
#endif /* NO_TLS */
#ifdef CYASSL_DTLS