/// <summary>
/// Creates a user credential from the provided data.
/// </summary>
/// <param name="username"></param>
/// <param name="password"></param>
/// <param name="strength"></param>
/// <param name="saltSize"></param>
/// <param name="iterations"></param>
/// <returns></returns>
public SrpUserCredential(string username, string password, SrpStrength strength = SrpStrength.Bits1024, int saltSize = 32, int iterations = 4000)
{
username = username.Normalize(NormalizationForm.FormKC);
password = password.Normalize(NormalizationForm.FormKC);
UsernameBytes = Encoding.UTF8.GetBytes(username);
var constants = SrpConstants.Lookup(strength);
BigInteger N = constants.N;
BigInteger g = constants.g;
byte[] s = SaltGenerator.Create(saltSize);
byte[] hashPassword = PBKDF2.ComputeSaltedPassword(HMACMethod.SHA512, Encoding.UTF8.GetBytes(password), s, iterations, 64);
Sha512Digest hash = new Sha512Digest();
byte[] output = new byte[hash.GetDigestSize()];
hash.BlockUpdate(UsernameBytes, 0, UsernameBytes.Length);
hash.Update((byte)':');
hash.BlockUpdate(hashPassword, 0, hashPassword.Length);
hash.DoFinal(output, 0);
hash.BlockUpdate(s, 0, s.Length);
hash.BlockUpdate(output, 0, output.Length);
hash.DoFinal(output, 0);
BigInteger x = new BigInteger(1, output).Mod(N);
BigInteger v = g.ModPow(x, N);
UserName = username;
Salt = s;
Verification = v.ToByteArray();
Iterations = iterations;
SrpStrength = strength;
VerificationInteger = new BigInteger(1, Verification);
}
void SetSrpStrength(SrpStrength strength)
{
m_strength = strength;
m_srpByteLength = ((int)strength) >> 3;
m_param = SrpConstants.Lookup(m_strength);
m_client = new Srp6Client(m_param);
}
void SetSrpStrength(SrpStrength strength)
{
m_strength = strength;
m_srpByteLength = ((int)strength) >> 3;
m_param = SrpConstants.Lookup(m_strength);
m_client = new Srp6Client(m_param);
}
static SrpConstants()
{
SrpConstants c;
c = new SrpConstants(
"EEAF0AB9ADB38DD69C33F80AFA8FC5E86072618775FF3C0B9EA2314C" +
"9C256576D674DF7496EA81D3383B4813D692C6E0E0D5D8E250B98BE4" +
"8E495C1D6089DAD15DC7D7B46154D6B6CE8EF4AD69B15D4982559B29" +
"7BCF1885C529F566660E57EC68EDBC3C05726CC02FD4CBF4976EAA9A" +
"FD5138FE8376435B9FC61D2FC0EB06E3", "2");
s_groupParameters.Add(1024, c);
c = new SrpConstants(
"9DEF3CAFB939277AB1F12A8617A47BBBDBA51DF499AC4C80BEEEA961" +
"4B19CC4D5F4F5F556E27CBDE51C6A94BE4607A291558903BA0D0F843" +
"80B655BB9A22E8DCDF028A7CEC67F0D08134B1C8B97989149B609E0B" +
"E3BAB63D47548381DBC5B1FC764E3F4B53DD9DA1158BFD3E2B9C8CF5" +
"6EDF019539349627DB2FD53D24B7C48665772E437D6C7F8CE442734A" +
"F7CCB7AE837C264AE3A9BEB87F8A2FE9B8B5292E5A021FFF5E91479E" +
"8CE7A28C2442C6F315180F93499A234DCF76E3FED135F9BB", "2");
s_groupParameters.Add(1536, c);
c = new SrpConstants(
"AC6BDB41324A9A9BF166DE5E1389582FAF72B6651987EE07FC319294" +
"3DB56050A37329CBB4A099ED8193E0757767A13DD52312AB4B03310D" +
"CD7F48A9DA04FD50E8083969EDB767B0CF6095179A163AB3661A05FB" +
"D5FAAAE82918A9962F0B93B855F97993EC975EEAA80D740ADBF4FF74" +
"7359D041D5C33EA71D281E446B14773BCA97B43A23FB801676BD207A" +
"436C6481F1D2B9078717461A5B9D32E688F87748544523B524B0D57D" +
"5EA77A2775D2ECFA032CFBDBF52FB3786160279004E57AE6AF874E73" +
"03CE53299CCC041C7BC308D82A5698F3A8D0C38271AE35F8E9DBFBB6" +
"94B5C803D89F7AE435DE236D525F54759B65E372FCD68EF20FA7111F" +
"9E4AFF73", "2");
s_groupParameters.Add(2048, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF", "5");
s_groupParameters.Add(3072, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" +
"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" +
"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" +
"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" +
"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199" +
"FFFFFFFFFFFFFFFF", "5");
s_groupParameters.Add(4096, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" +
"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" +
"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" +
"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" +
"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492" +
"36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406" +
"AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918" +
"DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151" +
"2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03" +
"F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F" +
"BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" +
"CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B" +
"B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632" +
"387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E" +
"6DCC4024FFFFFFFFFFFFFFFF", "5");
s_groupParameters.Add(6144, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" +
"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" +
"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" +
"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" +
"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492" +
"36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406" +
"AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918" +
"DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151" +
"2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03" +
"F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F" +
"BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" +
"CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B" +
"B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632" +
"387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E" +
"6DBE115974A3926F12FEE5E438777CB6A932DF8CD8BEC4D073B931BA" +
"3BC832B68D9DD300741FA7BF8AFC47ED2576F6936BA424663AAB639C" +
"5AE4F5683423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9" +
"22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B4BCBC886" +
"2F8385DDFA9D4B7FA2C087E879683303ED5BDD3A062B3CF5B3A278A6" +
"6D2A13F83F44F82DDF310EE074AB6A364597E899A0255DC164F31CC5" +
"0846851DF9AB48195DED7EA1B1D510BD7EE74D73FAF36BC31ECFA268" +
"359046F4EB879F924009438B481C6CD7889A002ED5EE382BC9190DA6" +
"FC026E479558E4475677E9AA9E3050E2765694DFC81F56E880B96E71" +
"60C980DD98EDD3DFFFFFFFFFFFFFFFFF", "19");
s_groupParameters.Add(8192, c);
}
private bool StandardAuthentication(IDigest hash, Stream stream, byte[] additionalChallenge)
{
// Authenticate (If mode = 1)
// C <= S
// byte PasswordHashMethod
// byte SaltLength
// byte[] Salt
// int Iterations
// byte SrpHashMethod
// int Bit Strength
// byte[] Public B (Size equal to SRP Length)
// C => S
// byte[] Public A (Size equal to SRP Length)
// byte[] Client Proof: H(Public A | Public B | SessionKey)
// C <= S
// Bool Success (if false, done)
// byte[] Server Proof: H(Public B | Public A | SessionKey)
int srpNumberLength = ((int)m_user.SrpStrength) >> 3;
stream.WriteByte((byte)PasswordHashMethod);
stream.WriteByte((byte)m_user.Salt.Length);
stream.Write(m_user.Salt);
stream.Write(m_user.Iterations);
stream.WriteByte((byte)SrpHashMethod);
stream.Write((int)m_user.SrpStrength);
stream.Flush(); //since computing B takes a long time. Go ahead and flush
var param = SrpConstants.Lookup(m_user.SrpStrength);
Srp6Server server = new Srp6Server(param, m_user.VerificationInteger);
BigInteger pubB = server.GenerateServerCredentials();
byte[] pubBBytes = pubB.ToPaddedArray(srpNumberLength);
stream.Write(pubBBytes);
stream.Flush();
//Read from client: A
byte[] pubABytes = stream.ReadBytes(srpNumberLength);
BigInteger pubA = new BigInteger(1, pubABytes);
//Calculate Session Key
BigInteger S = server.CalculateSecret(hash, pubA);
byte[] SBytes = S.ToPaddedArray(srpNumberLength);
byte[] clientProofCheck = hash.ComputeHash(pubABytes, pubBBytes, SBytes, additionalChallenge);
byte[] serverProof = hash.ComputeHash(pubBBytes, pubABytes, SBytes, additionalChallenge);
byte[] clientProof = stream.ReadBytes(hash.GetDigestSize());
if (clientProof.SecureEquals(clientProofCheck))
{
stream.Write(true);
stream.Write(serverProof);
stream.Flush();
byte[] K = hash.ComputeHash(pubABytes, SBytes, pubBBytes).Combine(hash.ComputeHash(pubBBytes, SBytes, pubABytes));
byte[] ticket = CreateSessionData(K, m_user);
SessionSecret = K;
stream.Write((short)ticket.Length);
stream.Write(ticket);
stream.Flush();
return(true);
}
stream.Write(false);
stream.Flush();
return(false);
}
static SrpConstants()
{
SrpConstants c;
c = new SrpConstants(
"EEAF0AB9ADB38DD69C33F80AFA8FC5E86072618775FF3C0B9EA2314C" +
"9C256576D674DF7496EA81D3383B4813D692C6E0E0D5D8E250B98BE4" +
"8E495C1D6089DAD15DC7D7B46154D6B6CE8EF4AD69B15D4982559B29" +
"7BCF1885C529F566660E57EC68EDBC3C05726CC02FD4CBF4976EAA9A" +
"FD5138FE8376435B9FC61D2FC0EB06E3", "2");
s_groupParameters.Add(1024, c);
c = new SrpConstants(
"9DEF3CAFB939277AB1F12A8617A47BBBDBA51DF499AC4C80BEEEA961" +
"4B19CC4D5F4F5F556E27CBDE51C6A94BE4607A291558903BA0D0F843" +
"80B655BB9A22E8DCDF028A7CEC67F0D08134B1C8B97989149B609E0B" +
"E3BAB63D47548381DBC5B1FC764E3F4B53DD9DA1158BFD3E2B9C8CF5" +
"6EDF019539349627DB2FD53D24B7C48665772E437D6C7F8CE442734A" +
"F7CCB7AE837C264AE3A9BEB87F8A2FE9B8B5292E5A021FFF5E91479E" +
"8CE7A28C2442C6F315180F93499A234DCF76E3FED135F9BB", "2");
s_groupParameters.Add(1536, c);
c = new SrpConstants(
"AC6BDB41324A9A9BF166DE5E1389582FAF72B6651987EE07FC319294" +
"3DB56050A37329CBB4A099ED8193E0757767A13DD52312AB4B03310D" +
"CD7F48A9DA04FD50E8083969EDB767B0CF6095179A163AB3661A05FB" +
"D5FAAAE82918A9962F0B93B855F97993EC975EEAA80D740ADBF4FF74" +
"7359D041D5C33EA71D281E446B14773BCA97B43A23FB801676BD207A" +
"436C6481F1D2B9078717461A5B9D32E688F87748544523B524B0D57D" +
"5EA77A2775D2ECFA032CFBDBF52FB3786160279004E57AE6AF874E73" +
"03CE53299CCC041C7BC308D82A5698F3A8D0C38271AE35F8E9DBFBB6" +
"94B5C803D89F7AE435DE236D525F54759B65E372FCD68EF20FA7111F" +
"9E4AFF73", "2");
s_groupParameters.Add(2048, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF", "5");
s_groupParameters.Add(3072, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" +
"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" +
"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" +
"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" +
"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199" +
"FFFFFFFFFFFFFFFF", "5");
s_groupParameters.Add(4096, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" +
"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" +
"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" +
"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" +
"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492" +
"36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406" +
"AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918" +
"DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151" +
"2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03" +
"F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F" +
"BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" +
"CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B" +
"B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632" +
"387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E" +
"6DCC4024FFFFFFFFFFFFFFFF", "5");
s_groupParameters.Add(6144, c);
c = new SrpConstants(
"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" +
"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" +
"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" +
"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" +
"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" +
"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" +
"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" +
"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" +
"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" +
"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" +
"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" +
"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" +
"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" +
"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" +
"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" +
"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" +
"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" +
"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492" +
"36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406" +
"AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918" +
"DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151" +
"2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03" +
"F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F" +
"BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" +
"CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B" +
"B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632" +
"387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E" +
"6DBE115974A3926F12FEE5E438777CB6A932DF8CD8BEC4D073B931BA" +
"3BC832B68D9DD300741FA7BF8AFC47ED2576F6936BA424663AAB639C" +
"5AE4F5683423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9" +
"22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B4BCBC886" +
"2F8385DDFA9D4B7FA2C087E879683303ED5BDD3A062B3CF5B3A278A6" +
"6D2A13F83F44F82DDF310EE074AB6A364597E899A0255DC164F31CC5" +
"0846851DF9AB48195DED7EA1B1D510BD7EE74D73FAF36BC31ECFA268" +
"359046F4EB879F924009438B481C6CD7889A002ED5EE382BC9190DA6" +
"FC026E479558E4475677E9AA9E3050E2765694DFC81F56E880B96E71" +
"60C980DD98EDD3DFFFFFFFFFFFFFFFFF", "19");
s_groupParameters.Add(8192, c);
}
public Srp6Client(SrpConstants param)
{
this.param = param;
random = new SecureRandom();
}
/**
* Initialises the server to accept a new client 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 v The client's verifier
* @param digest The digest algorithm associated with the client's verifier
* @param random For key generation
*/
public Srp6Server(SrpConstants param, BigInteger v)
{
this.param = param;
this.v = v;
this.privB = Srp6Utilities.GeneratePrivateValue(param.N, new SecureRandom());
}