diff options
Diffstat (limited to 'src/se/leap/leapclient/LeapSRPSession.java')
| -rw-r--r-- | src/se/leap/leapclient/LeapSRPSession.java | 94 |
1 files changed, 51 insertions, 43 deletions
diff --git a/src/se/leap/leapclient/LeapSRPSession.java b/src/se/leap/leapclient/LeapSRPSession.java index d266cd7f..f9037de9 100644 --- a/src/se/leap/leapclient/LeapSRPSession.java +++ b/src/se/leap/leapclient/LeapSRPSession.java @@ -14,7 +14,10 @@ import org.jboss.security.srp.SRPPermission; public class LeapSRPSession { private SRPParameters params; + private String username; + private String password; private BigInteger N; + private byte[] N_bytes; private BigInteger g; private BigInteger x; private BigInteger v; @@ -58,9 +61,11 @@ public class LeapSRPSession { this.params = params; this.g = new BigInteger(1, params.g); - byte[] N_bytes = Util.trim(params.N); + N_bytes = Util.trim(params.N); this.N = new BigInteger(1, N_bytes); - + this.username = username; + this.password = password; + if( abytes != null ) { A_LEN = 8*abytes.length; /* TODO Why did they put this condition? @@ -73,41 +78,8 @@ public class LeapSRPSession { else A_LEN = 64; - // Calculate x = H(s | H(U | ':' | password)) - byte[] salt_bytes = Util.trim(params.s); - byte[] xb = calculatePasswordHash(username, password, salt_bytes); - this.x = new BigInteger(1, xb); - - // Calculate v = kg^x mod N - String k_string = "bf66c44a428916cad64aa7c679f3fd897ad4c375e9bbb4cbf2f5de241d618ef0"; - this.v = calculateV(k_string); - //String v_string = v.toString(16); - serverHash = newDigest(); clientHash = newDigest(); - - // H(N) - byte[] digest_of_n = newDigest().digest(N_bytes); - - // H(g) - byte[] digest_of_g = newDigest().digest(params.g); - - // clientHash = H(N) xor H(g) - byte[] xor_digest = xor(digest_of_n, digest_of_g, digest_of_g.length); - //String hxg_string = new BigInteger(1, xor_digest).toString(16); - clientHash.update(xor_digest); - - // clientHash = H(N) xor H(g) | H(U) - byte[] username_digest = newDigest().digest(Util.trim(username.getBytes())); - username_digest = Util.trim(username_digest); - //String username_digest_string = new BigInteger(1, username_digest).toString(16); - clientHash.update(username_digest); - - // clientHash = H(N) xor H(g) | H(U) | s - //String salt_string = new BigInteger(1, salt_bytes).toString(16); - clientHash.update(salt_bytes); - - K = null; } /** @@ -198,13 +170,6 @@ public class LeapSRPSession { } A = g.modPow(a, N); Abytes = Util.trim(A.toByteArray()); - //String Abytes_string = new BigInteger(1, Abytes).toString(16); - - // clientHash = H(N) xor H(g) | H(U) | A - clientHash.update(Abytes); - - // serverHash = A - serverHash.update(Abytes); } return Abytes; } @@ -213,10 +178,52 @@ public class LeapSRPSession { * Calculates the parameter M1, to be sent to the SRP server. * It also updates hashes of client and server for further calculations in other methods. * @param Bbytes the parameter received from the server, in bytes + * @param bs * @return the parameter M1 * @throws NoSuchAlgorithmException */ - public byte[] response(byte[] Bbytes) throws NoSuchAlgorithmException { + public byte[] response(byte[] salt_bytes, byte[] Bbytes) throws NoSuchAlgorithmException { + // Calculate x = H(s | H(U | ':' | password)) + byte[] xb = calculatePasswordHash(username, password, salt_bytes); + this.x = new BigInteger(1, xb); + + // Calculate v = kg^x mod N + String k_string = "bf66c44a428916cad64aa7c679f3fd897ad4c375e9bbb4cbf2f5de241d618ef0"; + this.v = calculateV(k_string); + //String v_string = v.toString(16); + + + // H(N) + byte[] digest_of_n = newDigest().digest(N_bytes); + + // H(g) + byte[] digest_of_g = newDigest().digest(params.g); + + // clientHash = H(N) xor H(g) + byte[] xor_digest = xor(digest_of_n, digest_of_g, digest_of_g.length); + //String hxg_string = new BigInteger(1, xor_digest).toString(16); + clientHash.update(xor_digest); + + // clientHash = H(N) xor H(g) | H(U) + byte[] username_digest = newDigest().digest(Util.trim(username.getBytes())); + username_digest = Util.trim(username_digest); + //String username_digest_string = new BigInteger(1, username_digest).toString(16); + clientHash.update(username_digest); + + // clientHash = H(N) xor H(g) | H(U) | s + //String salt_string = new BigInteger(1, salt_bytes).toString(16); + clientHash.update(Util.trim(salt_bytes)); + + K = null; + + // clientHash = H(N) xor H(g) | H(U) | s | A | B + + byte[] Abytes = Util.trim(A.toByteArray()); + //String Abytes_string = new BigInteger(1, Abytes).toString(16); + + // clientHash = H(N) xor H(g) | H(U) | A + clientHash.update(Abytes); + // clientHash = H(N) xor H(g) | H(U) | s | A | B Bbytes = Util.trim(Bbytes); //String Bbytes_string = new BigInteger(1, Bbytes).toString(16); @@ -239,6 +246,7 @@ public class LeapSRPSession { byte[] M1 = Util.trim(clientHash.digest()); // serverHash = Astr + M + K + serverHash.update(Abytes); serverHash.update(M1); serverHash.update(K); return M1; |