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SL_REMAPPING_SP_PUB_CRYPTO_INVALID_BLOCK
What the security processor has established
Keep the symbolic result SL_REMAPPING_SP_PUB_CRYPTO_INVALID_BLOCK together with HRESULT 0xC004D20F. The producer is cryptographic processing inside the security processor; at the provider, algorithm, key, hash, signature and block-processing stage used to authenticate protected licensing data, Windows determined that an RSA operation produced or received a block that fails the structural checks for the selected operation.
the first result diagnostic fork is precise: the block is structurally invalid before application data can be trusted. That is why this result can require a different correction from the same visible activation banner.
The diagnostic record that matters
- cipher mode, block size and padding mode
- hash state and digest length
- signature format, length and verification key
- provider and algorithm identifiers
- key type and key-material length
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, record RSA key size, operation, encoded-block length, padding scheme and source of ciphertext/signature.
Cryptographic material should be logged by identifier, length, hash or thumbprint rather than by exporting secret keys or plaintext protected data.
Investigation sequence
- Use read-only inspection first: record RSA key size, operation, encoded-block length, padding scheme and source of ciphertext/signature.
Correcting the producing condition
Use the matching key, operation and encoding scheme and regenerate the block from an authoritative source.
Representative case: Ciphertext created for another key is decrypted and does not form a valid encoded RSA block.
Do not confuse it with these nearby results
| Result | Different condition |
|---|---|
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_FORMAT | Compared with this result, the RSA block encoding does not match the format required by the current operation. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_SIGNATURE | Compared with this result, signature verification completed and the signature does not authenticate the supplied hash with the selected key. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_PADDING | Compared with it, the final CBC block contains padding bytes that do not satisfy the expected padding scheme. |
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 — supported state, API or recovery information relevant to this HRESULT.
- BCryptHashData — reference for evidence collection and post-repair verification.
- BCryptVerifySignature — technical contract for the subsystem producing it.
- Signing data with CNG — official platform context used to interpret it.
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