[FLINK-36805][cdc-common] Add ConfigShade interface to support encryption of sensitive configuration items and provide a base64 encoding implementation #3829
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…itive configuration items and provide base64 encoding implementation
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…of sensitive configuration items and provide base64 encoding implementation
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When Flink CDC uses pipeline to submit jobs, we need to set configuration items in plaintext in the definition file, including sensitive configurations such as passwords for connecting to source and sink components (e.g., mysql, doris, etc.), which may be a security risk. To avoid the use of plaintext passwords, we provide an interface (ConfigShade) by implementing which developers can customize the decryption method themselves.
We also provide an implementation for base64 encoding first, not only as an example implementation of the interface, but also to solve the current problem of plaintext passwords.