keytool -import -v -alias server -file server.cert -keystore client.truststore -storepass 123456 -storetype BKS -provider org.bouncycastle.jce.provider.BouncyCastleProvider

android 双向认证 证书格式
https://blog.csdn.net/zhuhai__yizhi/article/details/82494879
https://github.com/Frank-Zhu/AndroidHttpsDemo
https://blog.csdn.net/qq_36992688/article/details/78861883