/// <summary>
/// Encrypts finger data captured for best finger detection.
/// </summary>
/// <param name="data">The data to encrypt.</param>
/// <param name="key">The key to encrypt data.</param>
/// <exception cref="ArgumentNullException"><paramref name="data"/> or <paramref name="key"/> is null.</exception>
public void Encrypt(BestFingerInfo data, SessionKey key)
{
ValidateNull(data, nameof(data));
ValidateNull(key, nameof(key));
// Create Rbd bytes.
var rbdBytes = data.ToXml("Rbd").ToString(SaveOptions.DisableFormatting).GetBytes();
using (var sha = SHA256.Create())
{
var rbdHash = sha.ComputeHash(rbdBytes);
// Encrypt data.
var encryptedRbd = key.Encrypt(rbdBytes);
var encryptedHash = key.Encrypt(rbdHash);
KeyInfo = key.KeyInfo;
// Set related properties.
AadhaarNumber = data.AadhaarNumber;
Timestamp = data.Timestamp;
Data = new EncryptedData {
Data = Convert.ToBase64String(encryptedRbd)
};
Hmac = Convert.ToBase64String(encryptedHash);
if (DeviceInfo != null)
{
DeviceInfo.IrisDeviceCode = DeviceInfo.DeviceNotApplicable;
}
}
Array.Clear(rbdBytes, 0, rbdBytes.Length);
}
public static async Task BestFingerDetectionAsync()
{
#region Device Level
// Set Best Finger Info
var bestFingerInfo = new BestFingerInfo
{
AadhaarNumber = "999999990019"
};
bestFingerInfo.Fingers.Add(new TestFinger {
Quality = Nfiq.Excellent, NumberOfAttempts = 3, Position = BiometricPosition.LeftIndex, Data = BiometricData
});
bestFingerInfo.Fingers.Add(new TestFinger {
Quality = Nfiq.Excellent, NumberOfAttempts = 4, Position = BiometricPosition.LeftMiddle, Data = BiometricData
});
bestFingerInfo.Fingers.Add(new TestFinger {
Quality = Nfiq.Excellent, NumberOfAttempts = 5, Position = BiometricPosition.LeftRing, Data = BiometricData
});
// Set Device Info
var bfdContext = new BfdContext
{
DeviceInfo = Configuration.Current.DeviceInfo.Create()
};
// Encrypt Data
var sessionKey = new SessionKey(Configuration.Current.UidaiEncryption, false);
await bfdContext.EncryptAsync(bestFingerInfo, sessionKey);
#endregion
#region Device To Agency
// TODO: Wrap DeviceContext{T} into AUA specific protocol and send it to AUA.
// On Device Side:
// var deviceXml = deviceContext.ToXml();
// var wrapped = WrapIntoAuaProtocol(deviceXml);
// On Agency Side:
// var auaXml = UnwrapFromAuaProtocol(wrapped);
// var auaContext = new BfdContext();
// auaContext.FromXml(auaXml);
#endregion
#region Agency Level
// Perform Best Finger Detection
var bfdClient = new BfdClient
{
AgencyInfo = Configuration.Current.AgencyInfo,
Request = new BfdRequest(bfdContext)
{
Signer = XmlSignature
},
Response = new BfdResponse {
Verifier = XmlSignature
}
};
await bfdClient.GetResponseAsync();
Console.WriteLine(string.IsNullOrEmpty(bfdClient.Response.ErrorCode)
? $"Best Finger Is: {bfdClient.Response.Ranks.First().Value}"
: $"Error Code: {bfdClient.Response.ErrorCode}");
#endregion
#region Agency To Device
// TODO: Wrap BfdResponse into AUA specific protocol and send it to device.
#endregion
}
/// <summary> /// Asynchronously encrypts data captured for request. /// </summary> /// <param name="data">The data to encrypt.</param> /// <param name="key">The key to encrypt data.</param> /// <returns>A task that represents the asynchronous encrypt operation.</returns> public async Task EncryptAsync(BestFingerInfo data, SessionKey key) => await Task.Run(() => Encrypt(data, key));
