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SL_REMAPPING_SP_PUB_API_INVALID_KEY_LENGTH
What SL_REMAPPING_SP_PUB_API_INVALID_KEY_LENGTH actually isolates
SL_REMAPPING_SP_PUB_API_INVALID_KEY_LENGTH (0xC004D055) reports that the Software Protection public API received a cryptographic key of an unsupported length. The useful diagnostic unit is the exact object and operation, not the product name alone.
Keep these facts stable
capture API name, algorithm, key length in bits/bytes, provider/environment, and where the key material was produced.
Corrective test
supply a key length defined for the selected algorithm/provider and retest the same API. Avoid broad reinstalls or policy changes until that controlled test changes the result.
Technical references
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