IEnroll4::GetKeyLenEx method (xenroll.h)

[This method is no longer available for use as of Windows Server 2008 and Windows Vista.]

The GetKeyLenEx method retrieves size information for the signature and exchange keys. This method was first defined in the IEnroll4 interface.

The values retrieved by this method are dependent upon the current cryptographic service provider.

Syntax

HRESULT GetKeyLenEx(
  [in]  LONG lSizeSpec,
  [in]  LONG lKeySpec,
  [out] LONG *pdwKeySize
);

[in] lSizeSpec

Value indicating the type of size information to be retrieved. Specify one of the following values.

Value	Meaning
XEKL_KEYSIZE_MIN	Minimum key size.
XEKL_KEYSIZE_MAX	Maximum key size.
XEKL_KEYSIZE_INC	Size of key increment. For more information, see Remarks.

[in] lKeySpec

Specifies the key for which size information is returned. Specify one of the following values.

Value	Meaning
XEKL_KEYSPEC_KEYX	Exchange key
XEKL_KEYSPEC_SIG	Signature key

[out] pdwKeySize

A pointer to LONG that receives the key size information, in bits.

None

If the cryptographic service provider does not support this method, an error is returned.

For additional details on the XEKL_KEYSIZE_INC value, see PP_SIG_KEYSIZE_INC usage in the CryptGetProvParam reference page.

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	xenroll.h
Library	Uuid.lib
DLL	Xenroll.dll