Entry Points

All custom CSPs must support all of the following DLL entry points:

• CPAcquireContext
• CPCreateHash
• CPDecrypt
• CPDeriveKey
• CPDestroyHash
• CPDestroyKey
• CPEncrypt
• CPExportKey
• CPGenKey
• CPGenRandom
• CPGetHashParam
• CPGetKeyParam
• CPGetProvParam
• CPGetUserKey
• CPHashData
• CPHashSessionKey
• CPImportKey
• CPReleaseContext
• CPSetHashParam
• CPSetKeyParam
• CPSetProvParam
• CPSignHash
• CPVerifySignature

All PROV_RSA_SCHANNEL and PROV_DH_SCHANNEL CSPs must also support all of the following DLL entry points: These entry points are optional for other custom CSPs):

• CPDuplicateHash
• CPDuplicateKey

These functions compose the CryptoSPI system program interface. Each function corresponds directly to a CryptoAPI cryptographic function.

Note  All of these functions must be declared with the WINAPI keyword.