Error
Error Code: ORA-28175

Oracle Error ORA-28175: Certificate Type Mismatch

📦 Oracle Database
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Description

The ORA-28175 error in Oracle Database indicates a mismatch between the certificate type provided by a proxy user and the type expected by the system. This typically occurs during authentication when using proxy authentication with certificates.
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Error Message

ORA-28175: incorrect certificate type
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Known Causes

4 known causes
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Incorrect Certificate Format
The proxy user is presenting a certificate in a format (e.g., PEM, DER) that is not supported or configured for the database.
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Wrong Certificate Authority (CA)
The certificate was issued by a Certificate Authority (CA) that is not trusted by the Oracle Database server.
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Certificate Type Mismatch in Configuration
The database configuration specifies a particular certificate type (e.g., X.509), but the presented certificate is of a different type.
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Certificate Not Intended for Authentication
The presented certificate is not configured or intended to be used for client authentication with the Oracle database.
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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

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