ssl Archives - Java / Cloud / BigData

December 7, 2021December 7, 2021
Java, Linux, SSL
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How to add URL cert to JKS

Let’s imagine that you need to download a certificate from a website / service / endpoint and put it in the trusted certificates store (JKS or cacerts). To do this, you need to fill in the parameters SERVER_URL, ALIAS_NAME, CERT_NAME and run the script: As a result, an trusted jks storage will be created with […]

April 28, 2021August 10, 2021
Java, SSL
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OPENSSL internal: SSLV3 ALERT HANDSHAKE FAILURE

Full text of the error: If you encounter such an error, there are at least two reasons: Incompatible version of boring-ssl library. Private key problem. For example, we wrote our own KeyManager implementation and the getPrivateKey() method returns null, or there is no such private key at all.

April 7, 2021August 10, 2021
Hadoop, Java, ZooKeeper
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How ZooKeeper ACL works

In this post I will describe the basic principles of how ACL works in ZooKeeper. ACL is not set recursively and is not inherited by the child nodes. If we have a read-only ACL for /path1/path2 or /path1/path2/path3, then deleting /path1 will fail, regardless of AСL of /path1. Several ACL records can be set on […]