crypto.setEngine(engine[, flags])
engine<string>flags<crypto.constants> 默认值:crypto.constants.ENGINE_METHOD_ALL
为部分或所有 OpenSSL 功能（由标志选择）加载并设置 engine。
engine 可以是 id 或引擎共享库的路径。
可选的 flags 参数默认使用 ENGINE_METHOD_ALL。
flags 是采用以下标志之一或混合的位字段（在 crypto.constants 中定义）：
crypto.constants.ENGINE_METHOD_RSAcrypto.constants.ENGINE_METHOD_DSAcrypto.constants.ENGINE_METHOD_DHcrypto.constants.ENGINE_METHOD_RANDcrypto.constants.ENGINE_METHOD_ECcrypto.constants.ENGINE_METHOD_CIPHERScrypto.constants.ENGINE_METHOD_DIGESTScrypto.constants.ENGINE_METHOD_PKEY_METHScrypto.constants.ENGINE_METHOD_PKEY_ASN1_METHScrypto.constants.ENGINE_METHOD_ALLcrypto.constants.ENGINE_METHOD_NONE
engine<string>flags<crypto.constants> Default:crypto.constants.ENGINE_METHOD_ALL
Load and set the engine for some or all OpenSSL functions (selected by flags).
engine could be either an id or a path to the engine's shared library.
The optional flags argument uses ENGINE_METHOD_ALL by default. The flags
is a bit field taking one of or a mix of the following flags (defined in
crypto.constants):
crypto.constants.ENGINE_METHOD_RSAcrypto.constants.ENGINE_METHOD_DSAcrypto.constants.ENGINE_METHOD_DHcrypto.constants.ENGINE_METHOD_RANDcrypto.constants.ENGINE_METHOD_ECcrypto.constants.ENGINE_METHOD_CIPHERScrypto.constants.ENGINE_METHOD_DIGESTScrypto.constants.ENGINE_METHOD_PKEY_METHScrypto.constants.ENGINE_METHOD_PKEY_ASN1_METHScrypto.constants.ENGINE_METHOD_ALLcrypto.constants.ENGINE_METHOD_NONE