What does Intel IPP status -172 (ippStsECCInvalidFlagErr) mean?

 
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ippStsECCInvalidFlagErr

This status is about the option flags passed to an ECC operation. The key material may be valid, but the requested mode, validation flag, or operation option is not accepted for that function and context.

Check wrapper enumerations carefully. A flag value that is valid for one IPP ECC helper can be meaningless for another, especially when application code stores flags as generic integers.

What to verify

  • The exact IPP function and its accepted flag enumeration.
  • Whether multiple flags were combined when the API expects one value.
  • Whether the context state supports the requested operation direction.

Intel IPP Error Reporting · Intel IPP Cryptography Reference


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