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Can we add our symmetric algorithm to OpenSSL?

I want to add my symmetric encryption algorithm to OpenSSL and use it as a symmetric algorithm in SSL protocol. I need to test it using s_client

. So I need to say that OpenSSL uses it as a symmetric algorithm. It is enough for OpenSSL to use RSA for key exchange phases. I just want an algorithm like DES

or to be replaced in the encryption algorithm AES

.

Is it possible? If so, how can I do this? Do I have a tutorial for my problem?

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Yes, you can. Please download the latest version (1.0.1j as of today) of openssl and look at the engines / ccgost folder. There you can find the implemented Russian symmetric encryption algorithm gost89 and use them as an example (see files gost89. * And gost_crypt.c). Full description of how to do it from this area. Good luck.



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