HRESULT 0x80091004 (CRYPT_E_INVALID_MSG

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CRYPT_E_INVALID_MSG_TYPE means the requested cryptographic operation is not valid for the current message type.

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CRYPT_E_OID_FORMAT	CRYPT_E_UNEXPECTED_ENCODING

CRYPT_E_INVALID_MSG_TYPE

The operation was requested for a CMS message type that does not support it. Signed, enveloped, and other message forms expose different parameters and controls.

What to check for CRYPT_E_INVALID_MSG_TYPE

Determine the actual message type before calling a type-specific CryptoAPI operation.
Verify that code handling a signed message is not attempting a decryption-only operation, and vice versa.
Read message parameters only after the message has been decoded far enough for that information to be available.

Microsoft: CryptMsgOpenToDecode

Microsoft: CryptMsgControl

Verification: Preserve the cryptographic input, provider, key or certificate state that produces invalid msg type, then compare the same operation after correcting only that state.

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