Re: CryptImportKey & PLAINTEXTKEYBLOB

From: Ryan Menezes [MSFT] (ryanmen_at_online.microsoft.com)
Date: 06/28/04

  • Next message: Michel Gallant: "Re: CryptImportKey & PLAINTEXTKEYBLOB" 
    Date: Sun, 27 Jun 2004 17:23:39 -0700

    You will need to use exponent-of-one key for W2k and W98.
    http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/Q228/7/86.ASP&NoWebContent=1 

    -- 
Thanks,
Ryan Menezes [MS]
This posting is provided "AS IS" with no warranties, and confers no rights.
"Oleg Leikin" <Oleg Leikin@discussions.microsoft.com> wrote in message
news:EE8702F1-F7F1-4FCC-9008-CD6EC68FA7DB@microsoft.com...
> Hi All,
>
> the same code works under XP and fails under 2000 (GetLastError returns
NTE_BAD_TYPE ater CryptImportKey is executed):
>
> .......................................
>
> DWORD keyBlobLength = 0;
> BYTE* pKeyBlob = NULL;
> Key2PLAINTEXTKEYBLOB(CALG_3DES, pKeyBase, keyBaseLength,
&pKeyBlob,keyBlobLength);
>
> if(!pKeyBlob)
>      return false;
>
> // import key to CSP
> if(!CryptImportKey( hProv,
> pKeyBlob,
> keyBlobLength,
> NULL,
> 0,
> &hKey
>           ))
> {
>    delete pKeyBlob;
>    return false;
> }
> .......................................
>
> where Key2PLAINTEXTKEYBLOB:
> //////////////
> Key2PLAINTEXTKEYBLOB(ALG_ID alg, BYTE* pKey, DWORD keyLength, BYTE**
ppKeyBlob, DWORD &keyBlobLength)
> {
>    // allocate blob
>    keyBlobLength = 2 * sizeof(BYTE) + sizeof(WORD) + sizeof(ALG_ID) +
sizeof(DWORD) + keyLength;
>  *ppKeyBlob = new BYTE[keyBlobLength];
>
>    if(*ppKeyBlob)
>    {
>         // init blob header
>         BYTE type = PLAINTEXTKEYBLOB;
>         BYTE version = CUR_BLOB_VERSION;
>         WORD reserved = 0;
>
>         int index = 0;
>         // blob type
>        (*ppKeyBlob)[index] = type;
>        index ++;
>        // blob version
>        (*ppKeyBlob)[index] = version;
>        index ++;
>        // reserved
>        memcpy((*ppKeyBlob) + index, (WORD*)&reserved, sizeof(WORD));
>        index += sizeof(WORD);
>        // key alg
>        memcpy((*ppKeyBlob) + index, (ALG_ID*)&alg, sizeof(ALG_ID));
>        index += sizeof(ALG_ID);
>        // key length
>        memcpy((*ppKeyBlob) + index, (DWORD*)&keyLength, sizeof(DWORD));
>        index += sizeof(DWORD);
>        // key
>        memcpy((*ppKeyBlob) + index, pKey, keyLength);
>       }
>       else
>            keyBlobLength = 0;
> }
> //////////////
>
>
> Thanks in advance for any clue !
> Oleg
>
  • Next message: Michel Gallant: "Re: CryptImportKey & PLAINTEXTKEYBLOB"