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SL_REMAPPING_SP_PUB_CRYPTO_INVALID_CIPHER
What this Software Protection result isolates
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_CIPHER (0xC004D203) 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 requested cipher identifier is not a valid supported encryption algorithm.
This result already rules out several broad guesses: an invalid cipher differs from a known cipher offered by an unknown provider. 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. The decisive proof is to record SPAPI cipher ID, provider ID, API version and platform build.
Cryptographic material should be logged by identifier, length, hash or thumbprint rather than by exporting secret keys or plaintext protected data.
State to compare on both sides of the failure
- provider and algorithm identifiers
- key type and key-material length
- cipher mode, block size and padding mode
- hash state and digest length
- signature format, length and verification key
Related codes with different remedies
| Result | Different condition |
|---|---|
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_BLOCKLENGTH | Compared with this result, the configured block length is incompatible with the selected cipher. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_CIPHERMODE | Compared with this result, the requested encrypt/decrypt or chaining-mode configuration is internally contradictory or unsupported. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_KEYLENGTH | Compared with this result, the supplied cryptographic key material has a length unsupported by the selected algorithm or key type. |
A reproducible troubleshooting path
- Identify the caller and operation instance that produced
0xC004D203. - Preserve the first inner I/O, crypto, parser or policy status that precedes the public HRESULT.
- Collect the code-specific evidence: record SPAPI cipher ID, provider ID, API version and platform build.
Recommended handling
Select a cipher exposed by the active provider and supported by the current security-processor version.
Representative case: A persisted policy references an algorithm identifier removed or never supported on this platform.
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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