Decrypt the eKYC reponse using Protect Server HSM

[jyo...@syntizen.com]

Hi,

Can anyone tell me how to decrypt the UIDAI eKYC response which is encrypted with Public key of PFX certificate using Protect Server HSM?

I have received SDK but it is purely using Net.Pkcs11Interop.HighLevelAPI.

Regards,

Jyoshna

[Jyoshna Bayyapureddy]

Hi Jaroslav and the others,

I want to encrypt data with the private key but it returned an error!

Here is my code:
byte[] decode = rawData
Mechanism mechanism = new Mechanism(CKM.CKM_RSA_X_509);
byte[] decryptedData = session.Decrypt( mechanism, privateKey, decode);  

var PlText = decryptmessage(splitter.EncryptedData, splitter.IV, decryptedData);//Getting error Here when passing above line data(i.e., decryptedData)

private byte[] decryptmessage(byte[] cmessage, byte[] iVector, byte[] m_Key)

        {

            //// randomly generated number acts as inetialization vector

            byte[] m_IV = new byte[16];

            Array.Copy(iVector, 0, m_IV, 0, 16);

            // GenerateAESKey();

            KeyParameter aesKeyParam = ParameterUtilities.CreateKeyParameter("AES", m_Key);

            ParametersWithIV aesIVKeyParam = new ParametersWithIV(aesKeyParam, m_IV);

            IBufferedCipher cipher = CipherUtilities.GetCipher("AES/CFB/NoPadding");

            cipher.Init(false, aesIVKeyParam);

            return cipher.DoFinal(cmessage);

        }

The Error is:

    the key should be 128/192/256 bits in length

I am getting session key in 256 bytes. Can anyone help me to get the session key as 32 bytes?

Thanks & Regards, 

Jyoshna Bayyapureddy,

Website: www.syntizen.com

Email: jyo...@syntizen.com

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[Jaroslav Imrich]

Hello Jyoshna,

I've never heard of UIDAI eKYC so I have no idea ¯\_(ツ)_/¯

Regards, Jaroslav