SSL_Resumption

Pre-requisites

Openssl library version OpenSSL 1.1.1-dev
To install the latest OpenSSL master branch, follow the following steps:
$ git clone https://github.com/openssl/openssl.git
$ cd openssl
$ ./config --prefix=/usr/local
(–prefix is used to mention the top of the installation directory tree. Default directory is /usr/local for unix system)
$ ./config enable-tls1_3
(do step 4 only if tls1.3 is to be enabled)
$ make -j2
$ sudo make install
$ openssl help

Build Instructions

1. build.sh file is the main build file. The command to build the server client pair is
   sh build.sh
   e.g $ sh build.sh
   

Run Instructions

1. Command to run the server program
   ./server <test_case_code> [port No (Optional param - default port is 12345)]
   

2. Command to run the client program
   ./client <server_ip> <test_case_code> [port No (Optional param - default port is 12345)]
   

3. The client server pair can be run to test different testCases with various ciphersuites. Following Testcases Codes are supported.
   

TestCase_Code    Test case Explanation

1		TLS1.2_No Session Resumption Connection
2		TLS1.2_Session Resumption using Session Identifiers
3		TLS1.2_Session Resumption using Session Tickets
4		TLS1.3_No Session Resumption Connection
5		TLS1.3_Session Resumption using Shared PSK
6		TLS1.3_Session Resumption using External PSK 
7 		TLS1.3_Session Resumption using External Session file
8		TLS1.3_Session Resumption with Early Data

Ciphersuite_Code    CipherSuite Explanation

1		ECDHE-ECDSA-AES256-GCM-SHA384 with X25519 Elliptic curve
11		ECDHE-ECDSA-AES256-GCM-SHA384 with prime256v1 EC Param, 2048 bits DH Param
2		ECDHE-RSA-AES256-GCM-SHA384 with X25519 Elliptic curve, 2048 bits RSA keys
21		ECDHE-RSA-AES256-GCM-SHA384 with prime256v1 EC Param, 2048 bits DH Param, 2048 bits RSA keys
3		DHE-RSA-AES256-GCM-SHA384 with 2048 bits DH Param
4		DHE-RSA-AES256-GCM-SHA384 with 1024 bits DH Param
5		AES256-GCM-SHA384 with 3072 bits RSA keys
6		AES256-GCM-SHA384 with 2048 bits RSA keys
7		TLS13-AES-128-GCM-SHA256 with X25519 Elliptic Curve
71		TLS13-AES-128-GCM-SHA256 with prime256v1 EC Param, 2048 bits DH Param
8		TLS13-AES-128-GCM-SHA256 with X25519 Elliptic curve, 2048 bits RSA keys
81		TLS13-AES-128-GCM-SHA256 with prime256v1 EC Param, 2048 bits DH Param, 2048 bits RSA keys

Note:

CipherSuite_Code 1, 11, 2, 21, 3, 4, 5, 6 can be only used with TLS 1.2 (TestCase_Code 1,2 and 3)
CipherSuite_Code 7, 71, 8, 81 can be only used with TLS 1.3 (TestCase_Code 4,5, 6,7)
Only CipherSuite_Code 7 and 8 should be used with early Data test Case i.e. test Case 8

4. Example run
   

a) ./server 1 1
run server for no session resumption connection on TLS 1.2 using cipher suite ECDHE-ECDSA-AES256-GCM-SHA384 using elliptic curve X25519
./client 10.176.3.159 1 1
run client to connect to server running on 10.176.3.159 for the no resumption connection on TLS 1.2 using cipher suite ECDHE-ECDSA-AES256-GCM-SHA384 using elliptic curve X25519

b) ./server 4 7 6001
run server acceptinfg connection on port 6001 for no session resumption connection on TLS 1.3 using cipher suite TLS13-AES-128-GCM-SHA256 using elliptic curve X25519
./client 10.176.3.159 4 7 6001
run client to connect to server running on 10.176.3.159 on port 6001 for no session resumption connection on TLS 1.3 using cipher suite TLS13-AES-128-GCM-SHA256 using elliptic curve X25519

Keys, Certificates, Session Files

1. All the private keys and certificates can be found under ./network/credentials/keys directory
   
2. Session file in ./network/credentials/sessionFiles is written when Session Resumption is on