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That usually indicates a mismatch between the private key configured in Wireshark and the certificate/private key on the server. Ssl_decrypt_pre_master_secret wrong pre_master_secret length (67, expected 48) dissect_ssl3_handshake can't decrypt pre master secret That is normal, when the server sends it's certificate, it will send all the Intermediate CA certificates too, so that the client can validate the whole chain up to the root certificate (which it must have in it's trust store). I've compared the modulus output of my private key to that of the three certificates, and my private key matches the first certificate listed, but not the other two. This may be the cause of the problem: When the server sends me the 'Certificate' part of the handshake, it sends me THREE certificates, but I only have ONE private key. Ssl_generate_keyring_material not enough data to generate key (0x17 required 0x37 or 0x57)ĭissect_ssl3_hnd_srv_hello can't generate keyring materialĪnd ssl_decrypt_pre_master_secret wrong pre_master_secret length (67, expected 48)ĭissect_ssl3_handshake can't decrypt pre master secret In my debug file, the private key is loaded successfully, but I noticed the following two items which I think may indicate a problem: dissect_ssl3_hnd_srv_hello trying to generate keys

This may be the cause of the problem: When the server sends me the 'Certificate' part of the handshake, it sends me THREE certificates, but I only have ONE private key. The capture session I'm trying to decrypt does include both the client and the server hello. From the server hello, the cipher is TLS_RSA_WITH_AES_128_CBC_SHA. I may be wrong about this, but I believe that the cipher selected by the server is not Diffie-Hellman based. Below are the things that I've checked out (thanks again to Sake Blok's presentation for giving me these ideas):

I'm trying to decrypt SSL packets that are coming from the internet to an application in Windows, and I can't get the decryption to work.