The first 8 bytes (16 hex-encoded chars) of an encrypted pre-master secret (as transmitted over the wire in the ClientKeyExchange handshake message).Using a SSL keylog file which maps identifiers to master secrets. Works for RSA key exchanges and subject to the above limitation. Wireshark supports various methods to decrypt SSL:īy decrypting the pre-master secret using a private RSA key. These parameters are used in a DH key exchange, resulting in a shared secret (effectively the pre-master secret which is of course not visible on the wire). For cipher suites using the RSA key exchange, the private RSA key can be used to decrypt the encrypted pre-master secret.įor ephemeral Diffie-Hellman (DHE) cipher suites, the RSA private key is only used for signing the DH parameters (and not for encryption). Some background: Wireshark supports decryption of SSL sessions when the master secret can be calculated (which can be derived from a pre-master secret).
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