RE: Malign SSL server attacks

2000-10-18 Thread Tim Dierks
I am not familiar enough with the protocol to answer this question: is it possible for an evil SSL server to send packets such that it ends up with an arbitrary signature from a client? I'm trying to emphasize the importange of keyUsage bits. :) This is not possible without unreasonable

Re: Malign SSL server attacks

2000-10-18 Thread Eric Murray
On Tue, Oct 17, 2000 at 12:02:35PM -0400, [EMAIL PROTECTED] wrote: I am not familiar enough with the protocol to answer this question: is it possible for an evil SSL server to send packets such that it ends up with an arbitrary signature from a client? I'm trying to emphasize the importange

Re: Malign SSL server attacks

2000-10-18 Thread Rich Salz
The only time the client signs something is when the server requests client auth. In TLS, the client signs MD5 and/or SHA1 hashes of the TLS handshake messages that have passed between the client and server at that point in the protocol. In SSLv3, it signs an MD5 and/or SHA1 HMAC-like