ecdh.computeSecret(otherPublicKey[, inputEncoding][, outputEncoding])

• otherPublicKey <string> | <Buffer> | <TypedArray> | <DataView>
• inputEncoding <string> otherPublicKey 字符串的编码。
• outputEncoding <string> 返回值的编码。
• 返回: <Buffer> | <string>

使用 otherPublicKey 作为对方的公钥计算共享密钥，并返回计算出的共享密钥。 提供的密钥使用指定的 inputEncoding 进行解释，返回的密钥使用指定的 outputEncoding 进行编码。 如果未提供 inputEncoding，则 otherPublicKey 应为 Buffer、TypedArray 或 DataView。

如果给定 outputEncoding，将返回字符串；否则返回 Buffer。

当 otherPublicKey 位于椭圆曲线之外时，ecdh.computeSecret 将抛出 ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY 错误。 由于 otherPublicKey 通常由远程用户通过不安全的网络提供，因此请务必相应地处理此异常。

• otherPublicKey <string> | <Buffer> | <TypedArray> | <DataView>
• inputEncoding <string> The encoding of the otherPublicKey string.
• outputEncoding <string> The encoding of the return value.
• Returns: <Buffer> | <string>

Computes the shared secret using otherPublicKey as the other party's public key and returns the computed shared secret. The supplied key is interpreted using specified inputEncoding, and the returned secret is encoded using the specified outputEncoding. If the inputEncoding is not provided, otherPublicKey is expected to be a Buffer, TypedArray, or DataView.

If outputEncoding is given a string will be returned; otherwise a Buffer is returned.

ecdh.computeSecret will throw an ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY error when otherPublicKey lies outside of the elliptic curve. Since otherPublicKey is usually supplied from a remote user over an insecure network, be sure to handle this exception accordingly.