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SL_REMAPPING_SP_PUB_CRYPTO_INVALID_FORMAT
Why this is more specific than an activation failure
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_FORMAT (0xC004D210) is emitted by cryptographic processing inside the security processor. It marks a specific point inside the provider, algorithm, key, hash, signature and block-processing stage used to authenticate protected licensing data: the RSA block encoding does not match the format required by the current operation.
This result already rules out several broad guesses: a correctly sized RSA block can still have the wrong encoding format. Preserve its operation name, product instance and timestamp so a later retry does not hide the original failure.
State to compare on both sides of the failure
- signature format, length and verification key
- provider and algorithm identifiers
- key type and key-material length
- cipher mode, block size and padding mode
- hash state and digest length
Checks in the useful order
- Record this result,
0xC004D210, the exact API or service operation, and the affected product or protected object. - Prove the specific condition: capture padding/format identifier, key type, operation direction and producer implementation.
- Compare the neighboring results below and identify which condition actually applies.
Where it sits in the licensing pipeline
Algorithm selection, key lookup, block formatting and signature verification are independent boundaries; a failure in one does not prove corruption at the others. To verify this, capture padding/format identifier, key type, operation direction and producer implementation.
Similar symptoms, different conditions
| Result | Different condition |
|---|---|
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_BLOCK | Compared with this result, an RSA operation produced or received a block that fails the structural checks for the selected operation. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_PADDING | Compared with this result, the final CBC block contains padding bytes that do not satisfy the expected padding scheme. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_SIGNATURE | Compared with it, signature verification completed and the signature does not authenticate the supplied hash with the selected key. |
Safe recovery direction
Align producer and verifier on the documented RSA encoding and padding contract.
Representative case: A signature encoded for PSS is verified as if it used PKCS#1 v1.5 formatting.
Actions that usually destroy useful evidence
- Do not publish keys, decrypted license blobs or complete protected payloads in a support ticket.
- Do not disable signature or padding validation to make the operation continue.
Technical references
- CNG cryptographic primitive functions — technical contract for the subsystem producing it.
- BCryptHashData — official platform context used to interpret it.
- BCryptVerifySignature — supported state, API or recovery information relevant to this HRESULT.
- Signing data with CNG — reference for evidence collection and post-repair verification.
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