public void SrpHashComputesValidSrpIntegerHashes()
{
var parts = new[] { "Hello", " ", "world!" };
var sample = string.Concat(parts);
var srpint = SrpInteger.FromHex("48 65 6C 6C 6F 20 77 6F 72 6c 64 21");
H md5 = new SrpHash <MD5>().ComputeHash;
var hashmd5 = SrpInteger.FromHex("86FB269D190D2C85F6E0468CECA42A20");
Assert.AreEqual(hashmd5, md5(srpint));
Assert.AreEqual(hashmd5, md5(sample));
Assert.AreEqual(hashmd5, md5(parts));
Assert.AreEqual(16, new SrpHash <MD5>().HashSizeBytes);
H sha256 = new SrpHash <SHA256>().ComputeHash;
var hash256 = SrpInteger.FromHex("C0535E4BE2B79FFD93291305436BF889314E4A3FAEC05ECFFCBB7DF31AD9E51A");
Assert.AreEqual(hash256, sha256(srpint));
Assert.AreEqual(hash256, sha256(sample));
Assert.AreEqual(hash256, sha256(parts));
Assert.AreEqual(256 / 8, new SrpHash <SHA256>().HashSizeBytes);
H sha512 = new SrpHash <SHA512>().ComputeHash;
var hash512 = SrpInteger.FromHex("F6CDE2A0F819314CDDE55FC227D8D7DAE3D28CC556222A0A8AD66D91CCAD4AAD6094F517A2182360C9AACF6A3DC323162CB6FD8CDFFEDB0FE038F55E85FFB5B6");
Assert.AreEqual(hash512, sha512(srpint));
Assert.AreEqual(hash512, sha512(sample));
Assert.AreEqual(hash512, sha512(parts));
Assert.AreEqual(512 / 8, new SrpHash <SHA512>().HashSizeBytes);
}
public void SrpHashComputesValidStringHashes()
{
var parts = new[] { "D4C7F8A2B32", "C11B8FBA9581EC4BA4F1B0421", "", "5642EF7355E37C0FC0443EF7", "56EA2C6B8EEB755A1C72302", "7663CAA265EF785B8FF6A9B35227A52D86633DBDFCA43" };
var sample = string.Concat(parts);
var srpint = SrpInteger.FromHex(sample);
H md5 = new SrpHash <MD5>().ComputeHash;
var hashmd5 = SrpInteger.FromHex("34ada39bbabfa6e663f1aad3d7814121");
Assert.AreEqual(hashmd5, md5(srpint.ToHex().ToUpper()));
Assert.AreEqual(hashmd5, md5(sample));
Assert.AreEqual(hashmd5, md5(parts));
Assert.AreEqual(16, new SrpHash <MD5>().HashSizeBytes);
H sha256 = new SrpHash <SHA256>().ComputeHash;
var hash256 = SrpInteger.FromHex("1767fe8c94508ad3514b8332493fab5396757fe347023fc9d1fef6d26c3a70d3");
Assert.AreEqual(hash256, sha256(srpint.ToHex().ToUpper()));
Assert.AreEqual(hash256, sha256(sample));
Assert.AreEqual(hash256, sha256(parts));
Assert.AreEqual(256 / 8, new SrpHash <SHA256>().HashSizeBytes);
H sha512 = new SrpHash <SHA512>().ComputeHash;
var hash512 = SrpInteger.FromHex("f2406fd4b33b15a6b47ff78ccac7cd80eec7944092425b640d740e7dc695fdd42f583a9b4a4b98ffa5409680181999bfe319f2a3b50ddb111e8405019a8c552a");
Assert.AreEqual(hash512, sha512(srpint.ToHex().ToUpper()));
Assert.AreEqual(hash512, sha512(sample));
Assert.AreEqual(hash512, sha512(parts));
Assert.AreEqual(512 / 8, new SrpHash <SHA512>().HashSizeBytes);
}
public void SrpHashMiscTests()
{
var hash = new SrpHash(() => MD5.Create());
Assert.IsNotEmpty(hash.AlgorithmName);
var tmp = hash.ComputeHash(null, null, null);
}
public void CreateHasherByNameTests()
{
var sha1 = SrpHash.CreateHasher("sha1");
Assert.NotNull(sha1);
var sha256 = SrpHash.CreateHasher("sha256");
Assert.NotNull(sha256);
var sha384 = SrpHash.CreateHasher("sha384");
Assert.NotNull(sha384);
var sha512 = SrpHash.CreateHasher("sha512");
Assert.NotNull(sha512);
}
public void CreateHasherTests()
{
var sha1 = SrpHash <SHA1> .CreateHasher();
Assert.NotNull(sha1);
var sha256 = SrpHash <SHA256> .CreateHasher();
Assert.NotNull(sha256);
var sha384 = SrpHash <SHA384> .CreateHasher();
Assert.NotNull(sha384);
var sha512 = SrpHash <SHA512> .CreateHasher();
Assert.NotNull(sha512);
}
public void SrpClientDerivesThePrivateKeyAndVerifier()
{
// validate intermediate steps
var userName = "******";
var password = "******";
H H = new SrpHash <SHA256>().ComputeHash;
var step1 = H($"{userName}:{password}");
Assert.AreEqual(SrpInteger.FromHex("ed3250071433e544b62b5dd0341564825a697357b5379f07aabca795a4e0a109"), step1);
// step1.1
var salt = "34ada39bbabfa6e663f1aad3d7814121";
var s = SrpInteger.FromHex(salt);
var step11 = H(s);
Assert.AreEqual(SrpInteger.FromHex("a5acfc1292e1b8e171b7c9a0f7b5bcd9bbcd4a3485c18d9d4fcf4480e8573442"), step11);
// step1.2
var step12 = H(step1);
Assert.AreEqual(SrpInteger.FromHex("446d597ddf0e65ca0395926665e70f10a2b0f8194f633243e71359028895be6f"), step12);
// step2
var step2 = H(s, step1);
Assert.AreEqual(SrpInteger.FromHex("e2db59181003e48e326292b3b307a1173a5f1fd12c6ffde55f7289503065fd6c"), step2);
// private key derivation is deterministic for the same s, I, p
var privateKey = new SrpClient().DerivePrivateKey(salt, userName, password);
Assert.AreEqual("e2db59181003e48e326292b3b307a1173a5f1fd12c6ffde55f7289503065fd6c", privateKey);
// verifier
var verifier = new SrpClient().DeriveVerifier(privateKey);
Assert.AreEqual("622dad56d6c282a949f9d2702941a9866b7dd277af92a6e538b2d7cca42583275a2f4b64bd61369a24b23170223faf212e2f3bdddc529204c61055687c4162aa2cd0fd41ced0186406b8a6dda4802fa941c54f5115ca69953a8e265210349a4cb89dda3febc96c86df08a87823235ff6c87a170cc1618f38ec493e758e2cac4c04db3dcdac8656458296dbcc3599fc1f66cde1e62e477dd1696c65dbeb413d8ed832adc7304e68566b46a7849126eea62c95d5561306f76fe1f8a77a3bd85db85e6b0262064d665890ff46170f96ce403a9b485abe387e91ca85e3522d6276e2fff41754d57a71dee6da62aea614725da100631efd7442cf68a294001d8134e9", verifier);
}
/// <summary>
/// Creates the hasher.
/// </summary>
private HashAlgorithm CreateHasher()
{
var hasher = SrpHash.CreateHasher(H);
if (hasher == null)
{
HashAlgorithm blake2s() =>
Blake2S.Create().AsHashAlgorithm();
HashAlgorithm blake2b(int bits) =>
new Blake2BHasher(new Blake2BConfig {
OutputSizeInBits = bits
})
.AsHashAlgorithm();
switch (H.ToLowerInvariant())
{
case "blake2s-256":
return(blake2s());
case "blake2b-224":
return(blake2b(224));
case "blake2b-256":
return(blake2b(256));
case "blake2b-384":
return(blake2b(384));
case "blake2b-512":
return(blake2b(512));
}
}
return(hasher);
}
