To summarize ECDH_compute_key, you provide a pointer to one party's EC public Key, a pointer to another party's EC private key, and a pointer to a hashing routine and the function will compute a shared secret value.
However, there is much more to key exchange than merely understanding how to use this function. It is more important to know how to use it correctly. I suggest that you read and understand the concepts of key exchange relating to ECC and ECDH in NIST Special Pub 800-56A http://csrc.nist.gov/publications/nistpubs/800-56A/SP800-56A_Revision1_M ar08-2007.pdf Determine whether your application requires the use of ephemeral keys and whether your key exchange needs to be one way or two way. Then start looking into the mechanics of the actual API calls you will need to use. Also keep in mind that good security design necessitates that you use symmetric, asymmetric and hashing algorithms of equivalent strength. Bill -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sateesh Babu Sent: January 11, 2008 7:03 AM To: openssl-users@openssl.org Subject: How to use ECDH_compute_key Hi, There is not enough documentation on the usage of ECDH_compute_key. Can anyone please help me in understanding its usage? ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
