ecdh.generateKeys([encoding[, format]])
生成私有和公共 EC Diffie-Hellman 密钥值,并返回指定 format 和 encoding 中的公钥。此密钥应转让给另一方。
¥Generates private and public EC Diffie-Hellman key values, and returns
the public key in the specified format and encoding. This key should be
transferred to the other party.
format 参数指定点编码,可以是 'compressed' 或 'uncompressed'。如果未指定 format,则该点将以 'uncompressed' 格式返回。
¥The format argument specifies point encoding and can be 'compressed' or
'uncompressed'. If format is not specified, the point will be returned in
'uncompressed' format.
如果提供了 encoding,则返回一个字符串;否则返回 Buffer。
¥If encoding is provided a string is returned; otherwise a Buffer
is returned.