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SL_REMAPPING_SP_PUB_CRYPTO_INVALID_CIPHERMODE
What this Software Protection result isolates
The useful meaning of SL_REMAPPING_SP_PUB_CRYPTO_INVALID_CIPHERMODE, value 0xC004D204, is not simply “activation failed.” It comes from cryptographic processing inside the security processor, where the provider, algorithm, key, hash, signature and block-processing stage used to authenticate protected licensing data. The condition to investigate is the requested encrypt/decrypt or chaining-mode configuration is internally contradictory or unsupported.
For triage, this belongs to the cryptographic processing inside the security processor. The cipher can be valid while the requested mode/flag combination is not. Product-key changes or network tests are useful only when the evidence points back to those layers.
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 operation direction, chaining mode, padding flags, IV length and algorithm identifier.
Testing the failing stage
- Record this result,
0xC004D204, the exact API or service operation, and the affected product or protected object. - Prove the specific condition: record operation direction, chaining mode, padding flags, IV length and algorithm identifier.
- Compare the neighboring results below and identify which condition actually applies.
State to compare on both sides of the failure
- key type and key-material length
- cipher mode, block size and padding mode
- hash state and digest length
- signature format, length and verification key
- provider and algorithm identifiers
Do not confuse it with these nearby results
| Result | Different condition |
|---|---|
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_CIPHER | Compared with this result, the requested cipher identifier is not a valid supported encryption algorithm. |
SL_REMAPPING_SP_PUB_CRYPTO_UNKNOWN_PROVIDERID | Compared with this result, the cryptographic provider identifier is not registered in the security-processor API. |
SL_REMAPPING_SP_PUB_CRYPTO_INVALID_BLOCKLENGTH | Compared with it, the configured block length is incompatible with the selected cipher. |
Actions that usually destroy useful evidence
- Do not disable signature or padding validation to make the operation continue.
- Do not publish keys, decrypted license blobs or complete protected payloads in a support ticket.
Targeted fix
Choose one valid operation direction and a chaining/padding combination supported by the provider.
Representative case: A request marks a symmetric-key operation as both encrypt and decrypt.
Technical references
- CNG cryptographic primitive functions — reference for evidence collection and post-repair verification.
- BCryptHashData — technical contract for the subsystem producing it.
- BCryptVerifySignature — official platform context used to interpret it.
- Signing data with CNG — supported state, API or recovery information relevant to this HRESULT.
Looking for a different code? Search another status or error code.