TLS1_TXT_ECDH_RSA_WITH_AES_256_SHA384

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C) nothrow
enum TLS1_TXT_ECDH_RSA_WITH_AES_256_SHA384 = "ECDH-RSA-AES256-SHA384";

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