What is the format of such secret and how could I get those data using the OpenSSL APIs to be able to decrypt TLS 1. The protocol version is SSLv3, (D)TLS 1.0-1.2. For the DH key exchange, the premaster secret is. The cipher suite selected by the server is not using (EC)DHE. In this case, I would suggest the use of the PMSCLIENTRANDOM key which maps the Random bytes from the Client Hello message to the premaster secret (both are hex-encoded). This is why I thought certificates are not needed if I want to use Wireshark to decrypt those packets. In turn, the server uses its private key to decrypt the sent symmetric. Afaik when using certificates on top of the key there should be a piece of information coming from the other side at runtime, so then I can not decrypt the stream of packets if I dont have that information. CLIENT_HANDSHAKE_TRAFFIC_SECRET/SERVER_HANDSHAKE_TRAFFIC_SECRET. As documented in this post, Wireshark supports several options for providing secrets to enable TLS decryption. TLS was designed to operate on top of a reliable transport protocol such as TCP. Importing this (client or server) secret file into Wireshark as a Pre-Master-Secret Log File, I was able to decrypt the TLS 1.2 traffic, but as I know, the CLIENT_RANDOM cannot be used for TLS 1.3 (at least it does not work for me), but there I should use i.e. So far, this continues to look like a TLS 1.2 client hello with the standard client random, session ID, cipher suites and compression methods (which are. Size_t masterKeyLength = SSL_SESSION_get_master_key(SSL_get_session(ssl), masterKey, sizeof(masterKey)) Size_t randomLength = SSL_get_client_random(ssl, random, SS元_RANDOM_SIZE) I would like to create a secret file from both my TLS client and server programs (these are just test programs at the moment: client.exe and server.exe, in which I am playing around the SSL/TLS), that later can be used to decrypt the traffic in Wireshark.įor TLS 1.2, I created a CLIENT_RANDOM file with the following format (testing just a single connection, so there is just 1 single line in the file): CLIENT_RANDOM Ĭode snippet to read the random and the master key: uint8_t random
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