I_IrmCrypt.HrEncrypt Method

Last modified: October 07, 2009

Applies to: SharePoint Foundation 2010

Accepts unencrypted data and encrypts that data in place.

HRESULT HrEncrypt(
    ULONG  ulOffset,
    BYTE  *pbData,
    DWORD  cbData,
    DWORD *pcbData


[in] Where in the block to start the encryption. Generally set to zero unless stream functions are encrypting portions of a block.


[in/out] The data to be encrypted.


[in] The amount, in bytes, of data to encrypt.


[out] The amount of data that the function was actually able to encrypt. Under normal conditions, this is a DWORD whose value is equal to cbData.

In general, this method is not called directly by the 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.