// Tests signature verification using test vectors from NIST CAVP.
// http://csrc.nist.gov/groups/STM/cavp/digital-signatures.html
internal static void TestSignatureVerification() {
using (var reader = new System.IO.StreamReader(@"186-3ecdsatestvectors\SigVer.rsp")) {
EllipticCurve curve = null;
byte[] msg = null;
BigInteger qx = null;
BigInteger qy = null;
BigInteger r = null;
BigInteger s = null;
string result = null;
int testCount = 0;
while (true) {
string line = reader.ReadLine();
if (line == null) {
break;
}
var match = System.Text.RegularExpressions.Regex.Match(line, @"\[([-\w]+),(SHA-\d+)\]");
if (match.Success) {
string curveName = "nist" + match.Groups[1].Value.ToLowerInvariant().Replace("-", "");
curve = FindByName(curveName);
if (curve != null) {
using (var hashFunc = ECDSAHashAlgorithmChooser.Choose(curve)) {
var hashName = "SHA-" + hashFunc.HashSize.ToString();
if (hashName == match.Groups[2].Value) {
Debug.WriteLine("Test " + curve.CurveName);
}
else {
// hash function doesn't match
curve = null;
}
}
}
msg = null;
qx = qy = r = s = null;
result = null;
testCount = 0;
continue;
}
if (line.StartsWith("Msg = ") && curve != null) {
msg = BigIntegerConverter.ParseHex(line.Substring(6).Trim());
continue;
}
if (line.StartsWith("Qx = ") && curve != null) {
qx = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(5).Trim()));
continue;
}
if (line.StartsWith("Qy = ") && curve != null) {
qy = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(5).Trim()));
continue;
}
if (line.StartsWith("R = ") && curve != null) {
r = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(4).Trim()));
continue;
}
if (line.StartsWith("S = ") && curve != null) {
s = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(4).Trim()));
continue;
}
if (line.StartsWith("Result = ") && curve != null) {
result = line.Substring(9, 1);
if (msg != null && qx != null && qy != null && r != null && s != null) {
var pk = new ECDSAPublicKey(curve, new ECPoint(qx, qy));
var buf = new SSH2DataWriter();
buf.WriteBigInteger(r);
buf.WriteBigInteger(s);
var sig = buf.ToByteArray();
string verRes;
try {
pk.Verify(sig, msg);
verRes = "P";
}
catch (VerifyException) {
verRes = "F";
}
if (verRes != result) {
throw new Exception("verification result doesn't match");
}
++testCount;
Debug.WriteLine("Pass #{0}", testCount);
}
msg = null;
qx = qy = r = s = null;
result = null;
}
}
}
}
// Tests public key validation using test vectors from NIST CAVP.
// http://csrc.nist.gov/groups/STM/cavp/digital-signatures.html
internal static void TestPKV() {
using (var reader = new System.IO.StreamReader(@"186-3ecdsatestvectors\PKV.rsp")) {
EllipticCurve curve = null;
string qxs = null;
BigInteger qx = null;
BigInteger qy = null;
string result = null;
int testCount = 0;
while (true) {
string line = reader.ReadLine();
if (line == null) {
break;
}
var match = System.Text.RegularExpressions.Regex.Match(line, @"\[([-\w]+)\]");
if (match.Success) {
string curveName = "nist" + match.Groups[1].Value.ToLowerInvariant().Replace("-", "");
curve = FindByName(curveName);
if (curve != null) {
Debug.WriteLine("Test " + curve.CurveName);
}
qx = qy = null;
qxs = null;
result = null;
testCount = 0;
continue;
}
if (line.StartsWith("Qx = ") && curve != null) {
qxs = line.Substring(5).Trim();
qx = new BigInteger(BigIntegerConverter.ParseHex(qxs));
continue;
}
if (line.StartsWith("Qy = ") && curve != null) {
qy = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(5).Trim()));
continue;
}
if (line.StartsWith("Result = ") && curve != null) {
result = line.Substring(9, 1);
if (qx != null && qy != null) {
var pk = new ECDSAPublicKey(curve, new ECPoint(qx, qy));
string r = pk.IsValid() ? "P" : "F";
if (r != result) {
throw new Exception("validation result doesn't match");
}
++testCount;
Debug.WriteLine("Pass #{0} : {1}", testCount, qxs);
}
qx = qy = null;
qxs = null;
result = null;
}
}
}
}
// Tests key pair validation using test vectors from NIST CAVP.
// http://csrc.nist.gov/groups/STM/cavp/digital-signatures.html
internal static void TestKeyPair() {
using (var reader = new System.IO.StreamReader(@"186-3ecdsatestvectors\KeyPair.rsp")) {
EllipticCurve curve = null;
string ds = null;
BigInteger d = null;
BigInteger qx = null;
BigInteger qy = null;
int testCount = 0;
while (true) {
string line = reader.ReadLine();
if (line == null) {
break;
}
var match = System.Text.RegularExpressions.Regex.Match(line, @"\[([-\w]+)\]");
if (match.Success) {
string curveName = "nist" + match.Groups[1].Value.ToLowerInvariant().Replace("-", "");
curve = FindByName(curveName);
if (curve != null) {
Debug.WriteLine("Test " + curve.CurveName);
}
d = qx = qy = null;
ds = null;
testCount = 0;
continue;
}
if (line.StartsWith("d = ") && curve != null) {
ds = line.Substring(4).Trim();
d = new BigInteger(BigIntegerConverter.ParseHex(ds));
continue;
}
if (line.StartsWith("Qx = ") && curve != null) {
qx = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(5).Trim()));
continue;
}
if (line.StartsWith("Qy = ") && curve != null) {
qy = new BigInteger(BigIntegerConverter.ParseHex(line.Substring(5).Trim()));
if (d != null && qx != null) {
var pk = new ECDSAPublicKey(curve, new ECPoint(qx, qy));
var kp = new ECDSAKeyPair(curve, pk, d);
if (!kp.CheckKeyConsistency()) {
throw new Exception("validation failed");
}
++testCount;
Debug.WriteLine("Pass #{0} : {1}", testCount, ds);
}
d = qx = qy = null;
ds = null;
}
}
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="curve">elliptic curve</param>
/// <param name="publicKey">public key</param>
/// <param name="privateKey">private key</param>
public ECDSAKeyPair(EllipticCurve curve, ECDSAPublicKey publicKey, BigInteger privateKey) {
_curve = curve;
_publicKey = publicKey;
_privateKey = privateKey;
}