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ippStsCTRSizeErr
This status is specific to Counter (CTR) mode setup. In CTR mode the counter block is part of the input state used to generate the keystream; IPP rejects sizes that do not match the function contract.
The usual failure is a wrapper that treats the counter length, IV length, and cipher block size as interchangeable. They are related, but the IPP function still has a precise parameter contract.
Useful diagnostics
- Log the IPP function variant and all counter/IV length arguments.
- Check endian and increment policy only after the rejected size has been fixed.
- For streaming encryption, verify that a resumed context was initialized with the same counter layout.
Intel IPP Error Reporting · Intel IPP Cryptography Reference · NIST SP 800-38A CTR mode
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