生成密钥对/CSR证书请求/自签名证书

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DigitalSignature NonRepudiation KeyEncipherment DataEncipherment KeyAgreement
KeyCertSign(CA Required) CrlSign EncipherOnly DecipherOnly
ServerAuth ClientAuth CodeSigning EmailProtection IpsecEndSystem
IpsecTunnel IpsecUser TimeStamping OCSPSigning Wireless
SignAsCA