key blinding test

tests/Makefile

@@ -1,6 +1,6 @@
 CXXFLAGS += -Wall -Wextra -pedantic -O0 -g -std=c++11 -D_GLIBCXX_USE_NANOSLEEP=1 -I../libi2pd/ -pthread -Wl,--unresolved-symbols=ignore-in-object-files
 
-TESTS = test-gost test-gost-sig test-base-64 test-x25519 test-aeadchacha20poly1305
+TESTS = test-gost test-gost-sig test-base-64 test-x25519 test-aeadchacha20poly1305 test-blinding
 
 all: $(TESTS) run
 
@@ -22,6 +22,9 @@ test-x25519: ../libi2pd/Ed25519.cpp ../libi2pd/I2PEndian.cpp ../libi2pd/Log.cpp
 test-aeadchacha20poly1305: ../libi2pd/Crypto.cpp ../libi2pd/ChaCha20.cpp ../libi2pd/Poly1305.cpp test-aeadchacha20poly1305.cpp
 	 $(CXX) $(CXXFLAGS) $(NEEDED_CXXFLAGS) $(INCFLAGS) -o $@ $^ -lcrypto -lssl -lboost_system
 
+test-blinding: ../libi2pd/Crypto.cpp ../libi2pd/Blinding.cpp ../libi2pd/Ed25519.cpp ../libi2pd/I2PEndian.cpp ../libi2pd/Log.cpp ../libi2pd/util.cpp ../libi2pd/Identity.cpp ../libi2pd/Signature.cpp ../libi2pd/Timestamp.cpp test-blinding.cpp
+	 $(CXX) $(CXXFLAGS) $(NEEDED_CXXFLAGS) $(INCFLAGS) -o $@ $^ -lcrypto -lssl -lboost_system
+
 run: $(TESTS)
 	@for TEST in $(TESTS); do ./$$TEST ; done
 

tests/test-blinding.cpp

@@ -0,0 +1,43 @@
+#include <cassert>
+#include <memory>
+#include <string.h>
+#include "Blinding.h"
+#include "Identity.h"
+#include "Timestamp.h"
+
+using namespace i2p::data;
+using namespace i2p::util;
+using namespace i2p::crypto;
+
+void BlindTest (SigningKeyType sigType)
+{
+	auto keys = PrivateKeys::CreateRandomKeys (sigType);
+	BlindedPublicKey blindedKey (keys.GetPublic ());
+	auto timestamp = GetSecondsSinceEpoch ();	
+	char date[9];
+	GetDateString (timestamp, date);
+	uint8_t blindedPriv[64], blindedPub[128]; 
+	auto publicKeyLen = blindedKey.BlindPrivateKey (keys.GetSigningPrivateKey (), date, blindedPriv, blindedPub);
+	uint8_t blindedPub1[128];	
+	blindedKey.GetBlindedKey (date, blindedPub1);
+	// check if public key produced from private blinded key matches blided public key
+	assert (!memcmp (blindedPub, blindedPub1, publicKeyLen));
+	// try to sign and verify
+	std::unique_ptr<Signer> blindedSigner (PrivateKeys::CreateSigner (sigType, blindedPriv));
+	uint8_t buf[100], signature[128];
+	memset (buf, 1, 100);
+	blindedSigner->Sign (buf, 100, signature);	
+	std::unique_ptr<Verifier> blindedVerifier (IdentityEx::CreateVerifier (sigType));
+	blindedVerifier->SetPublicKey (blindedPub1);
+	assert (blindedVerifier->Verify (buf, 100, signature));		
+}
+
+int main ()
+{
+	// RedDSA test	
+	BlindTest (SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519);
+	// P256 test
+	BlindTest (SIGNING_KEY_TYPE_ECDSA_SHA256_P256);
+	// P384 test
+	BlindTest (SIGNING_KEY_TYPE_ECDSA_SHA384_P384);
+}

tests/test-gost-sig.cpp

@@ -21,12 +21,14 @@ int main ()
 	i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410TC26A512, priv, pub);
 	i2p::crypto::GOSTR3410_512_Signer signer (i2p::crypto::eGOSTR3410TC26A512, priv);
 	signer.Sign (example2, 72, signature);
-	i2p::crypto::GOSTR3410_512_Verifier verifier (i2p::crypto::eGOSTR3410TC26A512, pub);
+	i2p::crypto::GOSTR3410_512_Verifier verifier (i2p::crypto::eGOSTR3410TC26A512);
+	verifier.SetPublicKey (pub);
 	assert (verifier.Verify (example2, 72, signature));
 
 	i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410CryptoProA, priv, pub);
 	i2p::crypto::GOSTR3410_256_Signer signer1 (i2p::crypto::eGOSTR3410CryptoProA, priv);
 	signer1.Sign (example2, 72, signature);
-	i2p::crypto::GOSTR3410_256_Verifier verifier1 (i2p::crypto::eGOSTR3410CryptoProA, pub);
+	i2p::crypto::GOSTR3410_256_Verifier verifier1 (i2p::crypto::eGOSTR3410CryptoProA);
+	verifier1.SetPublicKey (pub);
 	assert (verifier1.Verify (example2, 72, signature));
 }