public void VerifyThrowsIfInvalidSignature()
{
var blsKeyPair = BlsKeyPair.GenerateG2();
var bbsKeyPair = blsKeyPair.GetBbsKey(1);
Assert.Throws <BbsException>(() => Service.Verify(new VerifyRequest(blsKeyPair, Array.Empty <byte>(), new[] { "message_0" })), "Signature cannot be empty array");
}
public void CreateBbsKeyFromBlsSecretKey()
{
var secretKey = BlsKeyPair.GenerateG2();
var publicKey = secretKey.GetBbsKey(1);
Assert.NotNull(publicKey);
Assert.AreEqual(196, publicKey.PublicKey.Length);
}
public void SignMultipleeMessages()
{
var keyPair = BlsKeyPair.GenerateG2();
var signature = Service.Sign(new SignRequest(keyPair, new[] { "message_1", "message_2" }));
Assert.NotNull(signature);
Assert.AreEqual(BbsSignatureService.SignatureSize, signature.Length);
}
public void SignSingleMessageUsingApi()
{
var myKey = BlsKeyPair.GenerateG2();
var signature = Service.Sign(new SignRequest(myKey, new[] { "message" }));
Assert.NotNull(signature);
Assert.AreEqual(signature.Length, NativeMethods.bbs_signature_size());
}
public void SignAndVerifyDifferentKeys()
{
var keyPair = BlsKeyPair.GenerateG2();
var messages = new[] { "message_1", "message_2" };
var signature = Service.Sign(new SignRequest(keyPair, messages));
var result = Service.Verify(new VerifyRequest(keyPair, signature, messages));
Assert.True(result);
}
public void GenerateBlsKeyWithoutSeed()
{
var blsKeyPair = BlsKeyPair.GenerateG2();
var dPublicKey = blsKeyPair.PublicKey;
Assert.NotNull(blsKeyPair);
Assert.NotNull(dPublicKey);
Assert.NotNull(blsKeyPair.SecretKey);
Assert.AreEqual(96, dPublicKey.Length);
Assert.AreEqual(32, blsKeyPair.SecretKey.Length);
}
public void GenerateG2KeyWithSeed()
{
var seed = "my seed";
var actual = BlsKeyPair.GenerateG2(seed);
Assert.NotNull(actual);
Assert.NotNull(actual.SecretKey);
Assert.NotNull(actual.PublicKey);
Assert.True(actual.IsG2());
Assert.False(actual.IsG1());
Assert.AreEqual(BlsKeyPair.SecretKeySize, actual.SecretKey.Length);
Assert.AreEqual(BlsKeyPair.PublicKeyG2Size, actual.PublicKey.Length);
}
public void CreateBbsKeyFromBlsPublicKey()
{
var blsKeypair = BlsKeyPair.GenerateG2();
var bbsKeyPair = new BlsKeyPair(blsKeypair.PublicKey.ToArray());
Assert.IsNull(bbsKeyPair.SecretKey);
var publicKey = bbsKeyPair.GetBbsKey(1);
Assert.NotNull(publicKey);
Assert.NotNull(bbsKeyPair.PublicKey);
Assert.IsNull(bbsKeyPair.SecretKey);
Assert.AreEqual(196, publicKey.PublicKey.Length);
Assert.AreEqual(32, blsKeypair.SecretKey.Length);
}
public void BlindCommitmentSingleMessageUsingApi()
{
var myKey = BlsKeyPair.GenerateG2();
var publicKey = myKey.GetBbsKey(1);
var commitment = Service.CreateBlindedCommitment(new CreateBlindedCommitmentRequest(
publicKey: publicKey,
messages: new[] { new IndexedMessage {
Index = 0, Message = "message_0"
} },
nonce: new byte[] { 1, 2, 3 }));
Assert.NotNull(commitment);
Assert.NotNull(commitment.BlindingFactor);
Assert.NotNull(commitment.BlindSignContext);
Assert.NotNull(commitment.Commitment);
}
public async Task SignVerifiableCredential()
{
var keyPair = BlsKeyPair.GenerateG2();
var document = Utilities.LoadJson("Data/test_vc.json");
var signedDocument = await LdSignatures.SignAsync(document, new ProofOptions
{
Suite = new BbsBlsSignature2020
{
KeyPair = keyPair,
VerificationMethod = "did:example:alice#key-1"
},
Purpose = new AssertionMethodPurpose()
});
signedDocument.Should().NotBeNull();
signedDocument["proof"].Should().NotBeNull();
signedDocument["proof"]["proofValue"].Should().NotBeNull();
}
public void BlindSignSingleMessageUsingApi()
{
var myKey = BlsKeyPair.GenerateG2();
var publicKey = myKey.GetBbsKey(2);
var messages = new[]
{
new IndexedMessage {
Index = 0, Message = "message_0"
},
new IndexedMessage {
Index = 1, Message = "message_1"
}
};
var nonce = new byte[] { 1, 2, 3 };
var commitment = Service.CreateBlindedCommitment(new CreateBlindedCommitmentRequest(publicKey, messages, nonce));
var blindSign = Service.BlindSign(new BlindSignRequest(myKey, publicKey, commitment.Commitment.ToArray(), messages));
Assert.NotNull(blindSign);
}
public void FullDemoTest()
{
var key = BlsKeyPair.GenerateG2();
var publicKey = key.GetBbsKey(5);
var nonce = new byte[] { 1, 2, 3 };
var messages = new[]
{
"message_1",
"message_2",
"message_3",
"message_4",
"message_5"
};
{
// Sign messages
var signature = Service.Sign(new SignRequest(key, messages));
Assert.NotNull(signature);
Assert.AreEqual(BbsSignatureService.SignatureSize, signature.Length);
// Verify messages
var verifySignatureResult = Service.Verify(new VerifyRequest(key, signature, messages));
Assert.True(verifySignatureResult);
// Create proof
var proofMessages1 = new[]
{
new ProofMessage {
Message = messages[0], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[1], ProofType = ProofMessageType.HiddenProofSpecificBlinding
},
new ProofMessage {
Message = messages[2], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[3], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[4], ProofType = ProofMessageType.HiddenProofSpecificBlinding
}
};
var proofResult = Service.CreateProof(new CreateProofRequest(publicKey, proofMessages1, signature, null, nonce));
Assert.NotNull(proofResult);
// Verify proof of revealed messages
var verifyResult1 = Service.VerifyProof(new VerifyProofRequest(publicKey, proofResult, proofMessages1.Where(x => x.ProofType == ProofMessageType.Revealed).Select(x => x.Message).ToArray(), nonce));
Assert.IsTrue(verifyResult1);
}
// Create blinded commitment
var blindedMessages = new[]
{
new IndexedMessage {
Index = 0, Message = messages[0]
}
};
var commitment = Service.CreateBlindedCommitment(new CreateBlindedCommitmentRequest(publicKey, blindedMessages, nonce));
Assert.NotNull(commitment);
// Verify blinded commitment
var verifyResult = Service.VerifyBlindedCommitment(new VerifyBlindedCommitmentRequest(publicKey, commitment.BlindSignContext.ToArray(), new [] { 0u }, nonce));
Assert.IsTrue(verifyResult);
// Blind sign
var messagesToSign = new[]
{
new IndexedMessage {
Index = 1, Message = messages[1]
},
new IndexedMessage {
Index = 2, Message = messages[2]
},
new IndexedMessage {
Index = 3, Message = messages[3]
},
new IndexedMessage {
Index = 4, Message = messages[4]
}
};
var blindedSignature = Service.BlindSign(new BlindSignRequest(key, publicKey, commitment.Commitment.ToArray(), messagesToSign));
Assert.NotNull(blindedSignature);
Assert.AreEqual(BbsSignatureService.BlindSignatureSize, blindedSignature.Length);
// Unblind signature
var unblindedSignature = Service.UnblindSignature(new UnblindSignatureRequest(blindedSignature, commitment.BlindingFactor.ToArray()));
Assert.NotNull(unblindedSignature);
Assert.AreEqual(BbsSignatureService.SignatureSize, unblindedSignature.Length);
// Verify signature
var verifyUnblindedSignatureResult = Service.Verify(new VerifyRequest(key, unblindedSignature, messages));
Assert.True(verifyUnblindedSignatureResult);
// Create proof
var proofMessages = new[]
{
new ProofMessage {
Message = messages[0], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[1], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[2], ProofType = ProofMessageType.HiddenExternalBlinding
},
new ProofMessage {
Message = messages[3], ProofType = ProofMessageType.HiddenExternalBlinding
},
new ProofMessage {
Message = messages[4], ProofType = ProofMessageType.HiddenExternalBlinding
}
};
var proof = Service.CreateProof(new CreateProofRequest(
publicKey: publicKey,
messages: proofMessages,
signature: unblindedSignature,
blindingFactor: commitment.BlindingFactor.ToArray(),
nonce: nonce));
Assert.NotNull(proof);
Assert.True(proof.Length > 0);
// Verify proof
var verifyProofMessages = proofMessages
.Where(x => x.ProofType == ProofMessageType.Revealed)
.Select(x => x.Message)
.ToArray();
var verifyProofResult = Service.VerifyProof(new VerifyProofRequest(publicKey, proof, verifyProofMessages, nonce));
Assert.IsTrue(verifyProofResult);
var messageCount = Service.GetTotalMessageCount(proof);
Assert.AreEqual(5, messageCount);
}