CertAlgIdToOID function

Use the CryptFindOIDInfo function instead of this function because ALG_ID identifiers are no longer supported in CNG. Use the CRYPT_OID_INFO_CNG_ALGID_KEY value in the dwKeyType parameter of the CryptFindOIDInfo function instead.

Windows Server 2003 and Windows XP:  

The CertAlgIdToOID function converts a CryptoAPI algorithm identifier (ALG_ID) to an Abstract Syntax Notation One (ASN.1) object identifier (OID) string.

Syntax

LPCSTR WINAPI CertAlgIdToOID(
  _In_ DWORD dwAlgId
);

Parameters

dwAlgId [in]

Value to be converted to an OID.

Return value

If the function succeeds, the function returns the null-terminated OID string.

If no OID string corresponds to the algorithm identifier, the function returns NULL.

Examples

// EXAMPLE USING CertAlgIdToOID() to 
// convert the CALG_SHA algorithm identifier to an 
// Object Identifier string.

//--------------------------------------------------------------------
//  Declare variables. 

LPCSTR pszObjID = NULL;

if(pszObjID = CertAlgIdToOID(CALG_SHA))
{
   printf("The OID for CALG_SHA  is %s \n",pszObjID);
}
else
{
   printf("No object identifier string correlates to the ALG_ID. \n");
}

Requirements

See also

Data Conversion Functions