I_IrmCrypt.HrDecrypt Method
Applies to: SharePoint Foundation 2010
Accepts encrypted data and decrypts that data in place.
HRESULT HrDecrypt(
ULONG ulOffset,
BYTE *pbData,
DWORD cbData,
DWORD *pcbData
) PURE;
Parameters
ulOffset
[in] Where in the block to start the decryption. Generally set to zero unless stream functions are decrypting portions of a block.
pbData
[in/out] The data to be decrypted.
cbData
[in] The amount, in bytes, of data to decrypt.
pcbData
[out] The amount of data that the function was actually able to decrypt. Under normal conditions, this is a DWORD whose value is equal to cbData.
Remarks
In general, this method is not called directly by the Information Rights Management (IRM) protector. Instead, this method is used by a stream operator, also written by the protector’s developer, which facilitates a higher level view of encrypting data.