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SL_REMAPPING_SP_PUB_CRYPTO_INVALID_PADDING
Where the failure occurs in Software Protection Platform
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_PADDING (0xC004D211) 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 final CBC block contains padding bytes that do not satisfy the expected padding scheme.
This result already rules out several broad guesses: padding failure may indicate truncation, wrong key/IV or tampering; it is not solved by ignoring the final bytes. Preserve its operation name, product instance and timestamp so a later retry does not hide the original failure.
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 cipher/mode, block size, IV provenance, ciphertext length and padding setting.
State to compare on both sides of the failure
- 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
Related codes with different remedies
| 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_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_SIGNATURE | Compared with this result, signature verification completed and the signature does not authenticate the supplied hash with the selected key. |
Testing the failing stage
- Identify the caller and operation instance that produced
0xC004D211. - Collect the code-specific evidence: record cipher/mode, block size, IV provenance, ciphertext length and padding setting.
Correcting the producing condition
Restore the correct key, IV and complete ciphertext, then decrypt with the matching padding mode.
Representative case: A protected blob is decrypted with the wrong IV and its final padding check fails.
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- Do not publish keys, decrypted license blobs or complete protected payloads in a support ticket.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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