Spring / Spring CredHub Interview questions
How does Spring CredHub regenerate a credential?
Regeneration only works on credentials that CredHub itself created with generate(); CredHub remembers the generation parameters that were used, so regenerate() can reproduce a fresh value with the same shape — same length, same character rules for a password, same key size for an RSA key — without the caller re-specifying anything.
From Spring CredHub, that's a single call through the credentials operations:
CredentialDetails<PasswordCredential> rotated = credHubOperations.credentials() .regenerate(credentialName, PasswordCredential.class);
The old value isn't discarded; it becomes a prior version accessible through getByNameWithHistory(), and the credential's name and permissions stay the same. This is what makes CredHub-driven regeneration a good building block for scheduled credential rotation, since callers don't need to track generation parameters themselves.
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