Examples of com.nimbusds.srp6.SRP6CryptoParams

com.nimbusds.srp6.SRP6ServerSession
The crypto parameters for the SRP-6a protocol. These must be agreed between client and server before authentication and consist of a large safe prime 'N', a corresponding generator 'g' and a hash function algorithm 'H'.
The practical approach is to have the server manage these and make them available to clients on request. This way, the client does not need to anticipate or otherwise keep track of which parameters are used for which users or servers; it only needs to verify their validity, which can be done mathematically or by simple table lookup.
For convenience this class includes a set of precomputed parameters. @author Vladimir Dzhuvinov

    
    System.out.print("\tEnter public server value 'B' (hex): ");
    BigInteger B = readBigInteger();
    System.out.println();
    
    SRP6ClientCredentials cred;
    
    try {
      cred = client.step2(config, s, B);
      
    } catch (SRP6Exception e) {

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    // Step 1
  
    System.out.println("Client session step 1");
    
    SRP6ClientSession client = new SRP6ClientSession();
    
    User user = getUser("\t");
    client.step1(user.I, user.P);
  
    System.out.println();
    
    
    // Step 2
    
    System.out.println("Client session step 2");
    
    SRP6CryptoParams config = getConfig("\t");
    
    System.out.print("\tEnter salt 's' (hex): ");
    BigInteger s = readBigInteger();
    System.out.println();
    
    System.out.print("\tEnter public server value 'B' (hex): ");
    BigInteger B = readBigInteger();
    System.out.println();
    
    SRP6ClientCredentials cred;
    
    try {
      cred = client.step2(config, s, B);
      
    } catch (SRP6Exception e) {
      
      System.out.println(e.getMessage());
      return;
    }
    
    System.out.println("\tComputed public value 'A' (hex): " + BigIntegerUtils.toHex(cred.A));
    System.out.println("\tComputed evidence message 'M1' (hex): " + BigIntegerUtils.toHex(cred.M1));
    System.out.println();
    
    
    // Step 3
    
    System.out.println("Client session step 3");
    
    System.out.print("\tEnter server evidence message 'M2' (hex): ");
    
    BigInteger M2 = readBigInteger();
    
    try {
      client.step3(M2);
      
    } catch (SRP6Exception e) {
    
      System.out.println(e.getMessage());
      return;

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   *            The large safe prime in radix10
   * @param g
   *            The safe prime generator in radix10
   */
  public SRP6JavascriptServerSessionSHA256(String N, String g) {
    super(new SRP6CryptoParams(fromDecimal(N), fromDecimal(g), SHA_256));
  }

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   *            The large safe prime in radix10
   * @param g
   *            The safe prime generator in radix10
   */
  public SRP6JavascriptServerSessionSHA1(String N, String g) {
    super(new SRP6CryptoParams(fromDecimal(N), fromDecimal(g), SHA_1));
  }

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 */
public class JavaVerifierGenerator {
  private final SRP6CryptoParams config;


  public JavaVerifierGenerator(String N, String g){
    config = new SRP6CryptoParams(SRP6JavascriptServerSession.fromDecimal(N), SRP6JavascriptServerSession.fromDecimal(g),
        SRP6JavascriptServerSessionSHA1.SHA_1);
  }

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   */
  private void generatePasswordVerifier()
    throws IOException {
    
    System.out.println("Initialize verifier generator");
    SRP6CryptoParams config = getConfig("\t");
    
    SRP6VerifierGenerator vGen = new SRP6VerifierGenerator(config);
    
    User user = getUser("");
    System.out.println();

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    // Step 2
    
    System.out.println("Client session step 2");
    
    SRP6CryptoParams config = getConfig("\t");
    
    System.out.print("\tEnter salt 's' (hex): ");
    BigInteger s = readBigInteger();
    System.out.println();

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    System.out.println("*** Nimbus SRP-6a server ***");
    System.out.println();
    
    // Step INIT
    System.out.println("Initialize server session");
    SRP6CryptoParams config = getConfig("\t");
    
    SRP6ServerSession server = new SRP6ServerSession(config);
    
    
    // Step 1

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    System.out.print(prefix + "Enter hash algorithm 'H' [SHA-1]: ");
    String H = readInput("SHA-1");
    System.out.println();
    
    return new SRP6CryptoParams(N, g, H);
  }

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   *            cryptographic constants which must match those being used by
   *            the client.
   */
  public SRP6JavascriptServerSession(SRP6CryptoParams srp6CryptoParams) {
    this.config = srp6CryptoParams;
    session = new SRP6ServerSession(config);
    session.setHashedKeysRoutine(new HexHashedURoutine());
    session.setClientEvidenceRoutine(new HexHashedClientEvidenceRoutine());
    session.setServerEvidenceRoutine(new HexHashedServerEvidenceRoutine());
  }

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Related Classes of com.nimbusds.srp6.SRP6CryptoParams

com.bitbucket.thinbus.srp6.js.JavaVerifierGenerator

com.bitbucket.thinbus.srp6.js.SRP6JavascriptServerSession

com.bitbucket.thinbus.srp6.js.SRP6JavascriptServerSessionSHA1

com.bitbucket.thinbus.srp6.js.SRP6JavascriptServerSessionSHA256

com.nimbusds.srp6.cli.SRP6Client

com.nimbusds.srp6.cli.SRP6Server

com.nimbusds.srp6.cli.SRP6Tool

com.nimbusds.srp6.SRP6ClientCredentials

com.nimbusds.srp6.SRP6ClientSession

com.nimbusds.srp6.SRP6CryptoParams

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