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have a question of signature with ECDSA

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#25556
Posted: 07/07/2013 21:41:08
by denny chen (Basic support level)
Joined: 06/30/2013
Posts: 3

Hi,
I would like to signature with ECDSA ,
but I cant find a function to get password for ECDSA like this:

Code
if (KeyMaterial is TElRSAKeyMaterial)
  {
    ((TElRSAKeyMaterial)(KeyMaterial)).Passphrase = tbPassphrase.Text;
  }
else if (KeyMaterial is TElDSAKeyMaterial)
  {
    ((TElDSAKeyMaterial)(KeyMaterial)).Passphrase = tbPassphrase.Text;
  }


help me to resolve this question
thanks very much
#25557
Posted: 07/08/2013 02:31:41
by Mykola Olshevsky (Basic support level)
Joined: 07/07/2005
Posts: 450

Hi. If you have a license, please assign license ticket to your account before we continue.

Passphrase property is used for loading secret key from PEM or PKCS#8 enveloped container. And yes, for EC keys there is no support for this operation - you should load it from ASN.1 DER-encoded key structure.
#25600
Posted: 07/09/2013 22:27:52
by denny chen (Basic support level)
Joined: 06/30/2013
Posts: 3

Hi,
thanks you answer for me
and I have some questions:

1. What else method could input a password to verify EC keys ?
2. If I have a license, what I can get? (more class data? or some codes for my problem?)
3. About license, should I just select PKIBlackbox package for my problem?

Please answer and thanks a lot.
#25604
Posted: 07/10/2013 03:28:47
by Mykola Olshevsky (Basic support level)
Joined: 07/07/2005
Posts: 450

Password doesn't verify any key, it can be used to decrypt key which is stored in container.
It depends on which format you store your key - PEM, PKCS#8 or whatever else.

Actually, without license you can only evaluate SecureBlackbox, and cannot use it in any other way.

If you need just public-key encryption/decryption, PKIBlackbox should be enough.
#25625
Posted: 07/11/2013 00:48:40
by denny chen (Basic support level)
Joined: 06/30/2013
Posts: 3

Ok,
and could you provide encryption/decryption & signature/verify demo code with ECDSA algorithm for me if I have a license.
#25631
Posted: 07/11/2013 03:30:41
by Mykola Olshevsky (Basic support level)
Joined: 07/07/2005
Posts: 450

Please specify what exact signature/encryption type do you need.
Our MessagesDemo allows to sign/verify and encrypt/decrypt files using the PKCS#7/CMS. Also you can use ECDSA with PGP.
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Access locked and protected files in Windows, read and write disks and partitions and more.

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