public void UnblindSignatureUsingApi()
{
var myKey = BbsProvider.GenerateBlsKey();
var publicKey = myKey.GeyBbsKeyPair(2);
var messages = new[]
{
new IndexedMessage {
Index = 0, Message = "message_0"
},
new IndexedMessage {
Index = 1, Message = "message_1"
}
};
var nonce = "123";
var commitment = BbsProvider.CreateBlindedCommitment(new CreateBlindedCommitmentRequest(publicKey, messages, nonce));
var blindedSignature = BbsProvider.BlindSign(new BlindSignRequest(myKey, publicKey, commitment.Commitment.ToArray(), messages));
var result = BbsProvider.UnblindSignature(new UnblindSignatureRequest(blindedSignature, commitment.BlindingFactor.ToArray()));
Assert.NotNull(result);
}
public void FullDemoTest()
{
var key = BbsProvider.GenerateBlsKey();
var publicKey = key.GeyBbsKeyPair(5);
var nonce = "123";
var messages = new[]
{
"message_1",
"message_2",
"message_3",
"message_4",
"message_5"
};
{
// Sign messages
var signature = BbsProvider.Sign(new SignRequest(key, messages));
Assert.NotNull(signature);
Assert.AreEqual(BbsProvider.SignatureSize, signature.Length);
// Verify messages
var verifySignatureResult = BbsProvider.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.Revealed
},
new ProofMessage {
Message = messages[2], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[3], ProofType = ProofMessageType.Revealed
},
new ProofMessage {
Message = messages[4], ProofType = ProofMessageType.Revealed
}
};
var proofResult = BbsProvider.CreateProof(new CreateProofRequest(publicKey, proofMessages1, signature, null, nonce));
Assert.NotNull(proofResult);
// Verify proof of revealed messages
var indexedMessages1 = new[]
{
new IndexedMessage {
Message = messages[0], Index = 0u
},
new IndexedMessage {
Message = messages[1], Index = 1u
},
new IndexedMessage {
Message = messages[2], Index = 2u
},
new IndexedMessage {
Message = messages[3], Index = 3u
},
new IndexedMessage {
Message = messages[4], Index = 4u
}
};
var verifyResult1 = BbsProvider.VerifyProof(new VerifyProofRequest(publicKey, proofResult, indexedMessages1, nonce));
Assert.AreEqual(SignatureProofStatus.Success, verifyResult1);
}
// Create blinded commitment
var blindedMessages = new[]
{
new IndexedMessage {
Index = 0, Message = messages[0]
}
};
var commitment = BbsProvider.CreateBlindedCommitment(new CreateBlindedCommitmentRequest(publicKey, blindedMessages, nonce));
Assert.NotNull(commitment);
// Verify blinded commitment
var verifyResult = BbsProvider.VerifyBlindedCommitment(new VerifyBlindedCommitmentRequest(publicKey, commitment.BlindSignContext.ToArray(), new [] { 0u }, nonce));
Assert.AreEqual(SignatureProofStatus.Success, 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 = BbsProvider.BlindSign(new BlindSignRequest(key, publicKey, commitment.Commitment.ToArray(), messagesToSign));
Assert.NotNull(blindedSignature);
Assert.AreEqual(BbsProvider.BlindSignatureSize, blindedSignature.Length);
// Unblind signature
var unblindedSignature = BbsProvider.UnblindSignature(new UnblindSignatureRequest(blindedSignature, commitment.BlindingFactor.ToArray()));
Assert.NotNull(unblindedSignature);
Assert.AreEqual(BbsProvider.SignatureSize, unblindedSignature.Length);
// Verify signature
var verifyUnblindedSignatureResult = BbsProvider.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 = BbsProvider.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 indexedMessages = new[]
{
new IndexedMessage {
Message = messages[0], Index = 0u
},
new IndexedMessage {
Message = messages[1], Index = 1u
}
};
var verifyProofResult = BbsProvider.VerifyProof(new VerifyProofRequest(publicKey, proof, indexedMessages, nonce));
Assert.AreEqual(SignatureProofStatus.Success, verifyProofResult);
}