CRYPT_EAL_Md CRYPT_EAL_MdCopyCtx CRYPT_EAL_MdDeinit CRYPT_EAL_MdDupCtx CRYPT_EAL_MdFinal CRYPT_EAL_MdFreeCtx CRYPT_EAL_MdGetDigestSize CRYPT_EAL_MdGetId CRYPT_EAL_MdInit CRYPT_EAL_MdIsValidAlgId CRYPT_EAL_MdNewCtx CRYPT_EAL_MdUpdate

CRYPT_EAL_MdDupCtx() CRYPT_EAL_MdCTX * CRYPT_EAL_MdDupCtx ( const CRYPT_EAL_MdCTX *  ctx ) Copy the MD context. Note that need to call the CRYPT_EAL_MdFreeCtx interface to release the memory after the duplication is complete. 参数 ctx [IN] Source MD context 返回值 CRYPT_EAL_MdCTX,MD context pointer. NULL, if the operation fails.