/// <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>
public override void Encrypt(BestFingerInfo data, SessionKey key)
{
ValidateNull(data, nameof(data));
ValidateNull(key, nameof(key));
// Create Rbd bytes.
var rbdBytes = data.ToXml().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;
Data = new EncryptedData {
Data = Convert.ToBase64String(encryptedRbd)
};
Hmac = Convert.ToBase64String(encryptedHash);
Timestamp = data.Timestamp;
if (DeviceInfo != null)
{
DeviceInfo.IrisDeviceCode = Metadata.DeviceNotApplicable;
}
}
Array.Clear(rbdBytes, 0, rbdBytes.Length);
}
/// <summary>
/// Encrypts data captured for authentication.
/// </summary>
/// <param name="data">The data to encrypt.</param>
/// <param name="key">The key to encrypt data.</param>
public override void Encrypt(PersonalInfo data, SessionKey key)
{
ValidateNull(data, nameof(data));
ValidateNull(key, nameof(key));
// Create Pid bytes.
var pidXml = data.ToXml().ToString(SaveOptions.DisableFormatting);
var pidBytes = pidXml.GetBytes();
using (var sha = SHA256.Create())
{
// Encrypt data.
var encryptedPid = key.Encrypt(pidBytes);
var encryptedPidHash = key.Encrypt(sha.ComputeHash(pidBytes));
KeyInfo = key.KeyInfo;
// Set related properties.
AadhaarNumber = data.AadhaarNumber;
Uses = data.Uses;
Data = new EncryptedData {
Data = Convert.ToBase64String(encryptedPid)
};
Hmac = Convert.ToBase64String(encryptedPidHash);
Timestamp = data.Timestamp;
if (DeviceInfo != null)
{
if (data.Biometrics.All(b => b.Type != BiometricType.Iris))
{
DeviceInfo.IrisDeviceCode = Metadata.DeviceNotApplicable;
}
if (!data.Biometrics.Any(b => b.Type == BiometricType.Fingerprint || b.Type == BiometricType.Minutiae))
{
DeviceInfo.FingerprintDeviceCode = Metadata.DeviceNotApplicable;
}
}
// Set meta information.
if (Info != null)
{
Info.AadhaarNumberHash = sha.ComputeHash(AadhaarNumber.GetBytes()).ToHex();
Info.Timestamp = data.Timestamp;
Info.TerminalHash = sha.ComputeHash(Terminal.GetBytes()).ToHex();
const string demoStart = "<Demo", demoEnd = "</Demo";
var startOfDemoStart = pidXml.LastIndexOf(demoStart, StringComparison.Ordinal);
if (startOfDemoStart >= 0)
{
var startOfDemoEnd = pidXml.IndexOf(demoEnd, startOfDemoStart + demoStart.Length, StringComparison.Ordinal);
var realEnd = pidXml.IndexOf(">", startOfDemoEnd + demoEnd.Length, StringComparison.Ordinal);
var demoXml = pidXml.Substring(startOfDemoStart, realEnd - startOfDemoStart + 1);
var demoBytes = demoXml.GetBytes();
var demoHash = sha.ComputeHash(demoBytes);
Info.DemographicHash = demoHash.ToHex();
Array.Clear(demoBytes, 0, demoBytes.Length);
}
Info.Encode();
}
}
Array.Clear(pidBytes, 0, pidBytes.Length);
}