1 files changed, 0 insertions, 150 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/agreement/srp/SRP6Client.java b/core/src/main/java/org/bouncycastle/crypto/agreement/srp/SRP6Client.java
deleted file mode 100644
index 153e5a83..00000000
--- a/core/src/main/java/org/bouncycastle/crypto/agreement/srp/SRP6Client.java
+++ /dev/null
@@ -1,150 +0,0 @@
-package org.bouncycastle.crypto.agreement.srp;
-
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-import org.bouncycastle.crypto.CryptoException;
-import org.bouncycastle.crypto.Digest;
-
-/**
- * Implements the client side SRP-6a protocol. Note that this class is stateful, and therefore NOT threadsafe.
- * This implementation of SRP is based on the optimized message sequence put forth by Thomas Wu in the paper
- * "SRP-6: Improvements and Refinements to the Secure Remote Password Protocol, 2002"
- */
-public class SRP6Client
-{
-    protected BigInteger N;
-    protected BigInteger g;
-
-    protected BigInteger a;
-    protected BigInteger A;
-
-    protected BigInteger B;
-
-    protected BigInteger x;
-    protected BigInteger u;
-    protected BigInteger S;
-
-    protected BigInteger M1;
-	protected BigInteger M2;
-	protected BigInteger Key;
-	
-    protected Digest digest;
-    protected SecureRandom random;
-
-    public SRP6Client()
-    {
-    }
-
-    /**
-     * Initialises the client to begin new authentication attempt
-     * @param N The safe prime associated with the client's verifier
-     * @param g The group parameter associated with the client's verifier
-     * @param digest The digest algorithm associated with the client's verifier
-     * @param random For key generation
-     */
-    public void init(BigInteger N, BigInteger g, Digest digest, SecureRandom random)
-    {
-        this.N = N;
-        this.g = g;
-        this.digest = digest;
-        this.random = random;
-    }
-
-    /**
-     * Generates client's credentials given the client's salt, identity and password
-     * @param salt The salt used in the client's verifier.
-     * @param identity The user's identity (eg. username)
-     * @param password The user's password
-     * @return Client's public value to send to server
-     */
-    public BigInteger generateClientCredentials(byte[] salt, byte[] identity, byte[] password)
-    {
-        this.x = SRP6Util.calculateX(digest, N, salt, identity, password);
-        this.a = selectPrivateValue();
-        this.A = g.modPow(a, N);
-
-        return A;
-    }
-
-    /**
-     * Generates the secret S given the server's credentials
-     * @param serverB The server's credentials
-     * @return Client's verification message for the server
-     * @throws CryptoException If server's credentials are invalid
-     */
-    public BigInteger calculateSecret(BigInteger serverB) throws CryptoException
-    {
-        this.B = SRP6Util.validatePublicValue(N, serverB);
-        this.u = SRP6Util.calculateU(digest, N, A, B);
-        this.S = calculateS();
-
-        return S;
-    }
-
-    protected BigInteger selectPrivateValue()
-    {
-        return SRP6Util.generatePrivateValue(digest, N, g, random);        
-    }
-
-    private BigInteger calculateS()
-    {
-        BigInteger k = SRP6Util.calculateK(digest, N, g);
-        BigInteger exp = u.multiply(x).add(a);
-        BigInteger tmp = g.modPow(x, N).multiply(k).mod(N);
-        return B.subtract(tmp).mod(N).modPow(exp, N);
-    }
-    
-    /**
-	 * Computes the client evidence message M1 using the previously received values.
-	 * To be called after calculating the secret S.
-	 * @return M1: the client side generated evidence message
-	 * @throws CryptoException
-	 */
-	public BigInteger calculateClientEvidenceMessage() throws CryptoException{
-		// verify pre-requirements
-		if ((this.A==null)||(this.B==null)||(this.S==null)){
-			throw new CryptoException("Impossible to compute M1: " +
-					"some data are missing from the previous operations (A,B,S)");
-		}
-		// compute the client evidence message 'M1'
-		this.M1 = SRP6Util.calculateM1(digest, N, A, B, S);  
-		return M1;
-	}
-
-	/** Authenticates the server evidence message M2 received and saves it only if correct.
-	 * @param M2: the server side generated evidence message
-	 * @return A boolean indicating if the server message M2 was the expected one.
-	 * @throws CryptoException
-	 */
-	public boolean verifyServerEvidenceMessage(BigInteger serverM2) throws CryptoException{
-		//verify pre-requirements
-		if ((this.A==null)||(this.M1==null)||(this.S==null)){
-			throw new CryptoException("Impossible to compute and verify M2: " +
-					"some data are missing from the previous operations (A,M1,S)");
-		}
-		// Compute the own server evidence message 'M2'
-		BigInteger computedM2 = SRP6Util.calculateM2(digest, N, A, M1, S);
-		if (computedM2.equals(serverM2)){
-			this.M2 = serverM2;
-			return true;
-		}
-		return false;
-	}
-
-	/**
-	 * Computes the final session key as a result of the SRP successful mutual authentication
-	 * To be called after verifying the server evidence message M2.
-	 * @return Key: the mutually authenticated symmetric session key
-	 * @throws CryptoException
-	 */
-	public BigInteger calculateSessionKey() throws CryptoException{
-		//verify pre-requirements (here we enforce a previous calculation of M1 and M2)
-		if ((this.S==null)||(this.M1==null)||(this.M2==null)){
-			throw new CryptoException("Impossible to compute Key: " +
-					"some data are missing from the previous operations (S,M1,M2)");
-		}
-		this.Key = SRP6Util.calculateKey(digest, N, S);
-		return Key;
-	}
-}