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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.
Cryptographic material should be logged by identifier, length, hash or thumbprint rather than by exporting secret keys or plaintext protected data.
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.
Looking for a different code? Search another status or error code.