Error
Error Code: ORA-28169

Oracle Error ORA-28169: Unsupported Certificate

📦 Oracle Database
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Description

The ORA-28169 error indicates that the Oracle database server does not support the type of certificate being presented by the client for authentication. This typically occurs during TLS/SSL handshake when the server attempts to extract client credentials from an unrecognized certificate format.
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Error Message

ORA-28169: unsupported certificate type
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Known Causes

3 known causes
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Unsupported Certificate Format
The client certificate uses an encryption or signing algorithm that the Oracle server is not configured to recognize. This is often due to using a newer or less common algorithm.
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Missing Server Configuration
The Oracle server is not properly configured with the necessary libraries or settings to process the specific certificate type. This can occur after an upgrade or initial installation.
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Incorrect Certificate Authority (CA)
The certificate was issued by a CA that is not trusted by the Oracle server. The server needs to be configured to trust the CA.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

Find Help

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