atl - CryptoAPI - export/import of keys between different versions of Windows -


on win 2003 32 bit, export privatekeyblob cryptexportkey call (dwflags=0). attempt import key blob on win server 2008 64 bit 64 bit executable, call cryptimportkey fails nte_bad_data.

in both cases crypto provider initialized call

cryptacquirecontext(&hprov, szcontainer, null, prov_rsa_aes, crypt_machine_keyset)

the passwords export/import match. public key based on cryptderivekey of md5 hash of passwords identical in plain text represetnation. i'm not sure whether public keys end being equal in 2 systems.

are different types of systems (win 2003 32 bit vs win 2008 64 bit) expected cause of failure, , there way of getting work?

as conjectured public keys produced atl's ccryptderivedkey not equal on 2 systems. default settings of ccryptderivedkey must different in 2 versions of atl library.

since had access both source , destination servers, reexported , imported key in consistent manner - specifying algorithm, key size , presence of salt.

it nice know exact settings of ccryptderivedkey::initialize method in earlier version of atl library (visual studio 2005, believe).


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