pass iv to AES Encrypt/Decrypt directly. aes-test added

libi2pd/Crypto.cpp

@@ -442,9 +442,8 @@ namespace crypto
 		// encrypt
 		CBCEncryption encryption;
 		encryption.SetKey (shared);
-		encryption.SetIV (iv);
 		encrypted[257] = 0;
-		encryption.Encrypt (m, 256, encrypted + 258);
+		encryption.Encrypt (m, 256, iv, encrypted + 258);
 		EC_POINT_free (p);
 		BN_CTX_end (ctx);
 		BN_CTX_free (ctx);
@@ -477,8 +476,7 @@ namespace crypto
 			uint8_t m[256];
 			CBCDecryption decryption;
 			decryption.SetKey (shared);
-			decryption.SetIV (iv);
-			decryption.Decrypt (encrypted + 258, 256, m);
+			decryption.Decrypt (encrypted + 258, 256, iv, m);
 			// verify and copy
 			uint8_t hash[32];
 			SHA256 (m + 33, 222, hash);
@@ -560,7 +558,6 @@ namespace crypto
 	CBCEncryption::CBCEncryption () 
 	{ 
 		m_Ctx = EVP_CIPHER_CTX_new ();
-		//memset ((uint8_t *)m_LastBlock, 0, 16); 
 	}
 	
 	CBCEncryption::~CBCEncryption ()
@@ -569,10 +566,10 @@ namespace crypto
 			EVP_CIPHER_CTX_free (m_Ctx);
 	}	
 	
-	void CBCEncryption::Encrypt (const uint8_t * in, std::size_t len, uint8_t * out)
+	void CBCEncryption::Encrypt (const uint8_t * in, size_t len, const uint8_t * iv, uint8_t * out)
 	{
 		// len/16
-		EVP_EncryptInit_ex (m_Ctx, EVP_aes_256_cbc(), NULL, m_Key, m_IV);
+		EVP_EncryptInit_ex (m_Ctx, EVP_aes_256_cbc(), NULL, m_Key, iv);
 		EVP_CIPHER_CTX_set_padding (m_Ctx, 0);
 		int l;
 		EVP_EncryptUpdate (m_Ctx, out, &l, in, len);
@@ -582,7 +579,6 @@ namespace crypto
 	CBCDecryption::CBCDecryption () 
 	{ 
 		m_Ctx = EVP_CIPHER_CTX_new ();
-		//memset ((uint8_t *)m_IV, 0, 16); 
 	}
 	
 	CBCDecryption::~CBCDecryption ()
@@ -591,10 +587,10 @@ namespace crypto
 			EVP_CIPHER_CTX_free (m_Ctx);
 	}	
 	
-	void CBCDecryption::Decrypt (const uint8_t * in, std::size_t len, uint8_t * out)
+	void CBCDecryption::Decrypt (const uint8_t * in, size_t len, const uint8_t * iv, uint8_t * out)
 	{
 		// len/16
-		EVP_DecryptInit_ex (m_Ctx, EVP_aes_256_cbc(), NULL, m_Key, m_IV);
+		EVP_DecryptInit_ex (m_Ctx, EVP_aes_256_cbc(), NULL, m_Key, iv);
 		EVP_CIPHER_CTX_set_padding (m_Ctx, 0);
 		int l;
 		EVP_DecryptUpdate (m_Ctx, out, &l, in, len);
@@ -603,18 +599,18 @@ namespace crypto
 
 	void TunnelEncryption::Encrypt (const uint8_t * in, uint8_t * out)
 	{
-		m_IVEncryption.Encrypt (in, out); // iv
-		m_LayerEncryption.SetIV (out);
-		m_LayerEncryption.Encrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
-		m_IVEncryption.Encrypt (out, out); // double iv
+		uint8_t iv[16];
+		m_IVEncryption.Encrypt (in, iv); // iv
+		m_LayerEncryption.Encrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, iv, out + 16); // data
+		m_IVEncryption.Encrypt (iv, out); // double iv
 	}
 
 	void TunnelDecryption::Decrypt (const uint8_t * in, uint8_t * out)
 	{
-		m_IVDecryption.Decrypt (in, out); // iv
-		m_LayerDecryption.SetIV (out);
-		m_LayerDecryption.Decrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
-		m_IVDecryption.Decrypt (out, out); // double iv
+		uint8_t iv[16];
+		m_IVDecryption.Decrypt (in, iv); // iv
+		m_LayerDecryption.Decrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, iv, out + 16); // data
+		m_IVDecryption.Decrypt (iv, out); // double iv
 	}
 
 // AEAD/ChaCha20/Poly1305

libi2pd/Crypto.h

@@ -93,7 +93,7 @@ namespace crypto
 			ECBEncryption ();
 			~ECBEncryption ();
 			
-			void SetKey (const AESKey& key) { m_Key = key; };
+			void SetKey (const uint8_t * key) { m_Key = key; };
 			void Encrypt(const uint8_t * in, uint8_t * out);
 
 		private:
@@ -109,7 +109,7 @@ namespace crypto
 			ECBDecryption ();
 			~ECBDecryption ();
 			
-			void SetKey (const AESKey& key) { m_Key = key; };
+			void SetKey (const uint8_t * key) { m_Key = key; };
 			void Decrypt (const uint8_t * in, uint8_t * out);
 			
 		private:
@@ -125,15 +125,12 @@ namespace crypto
 			CBCEncryption ();
 			~CBCEncryption ();
 
-			void SetKey (const AESKey& key) { m_Key = key; }; // 32 bytes
-			void SetIV (const uint8_t * iv) { m_IV = iv; }; // 16 bytes
-			
-			void Encrypt (const uint8_t * in, std::size_t len, uint8_t * out);
+			void SetKey (const uint8_t * key) { m_Key = key; }; // 32 bytes		
+			void Encrypt (const uint8_t * in, size_t len, const uint8_t * iv, uint8_t * out);
 			
 		private:
 
 			AESKey m_Key;
-			i2p::data::Tag<16> m_IV;
 			EVP_CIPHER_CTX * m_Ctx;	
 	};
 
@@ -144,15 +141,12 @@ namespace crypto
 			CBCDecryption ();
 			~CBCDecryption ();
 			
-			void SetKey (const AESKey& key) { m_Key = key; }; // 32 bytes
-			void SetIV (const uint8_t * iv) { m_IV = iv; }; // 16 bytes
-
-			void Decrypt (const uint8_t * in, std::size_t len, uint8_t * out);
+			void SetKey (const uint8_t * key) { m_Key = key; }; // 32 bytes
+			void Decrypt (const uint8_t * in, size_t len, const uint8_t * iv, uint8_t * out);
 
 		private:
 
 			AESKey m_Key;
-			i2p::data::Tag<16> m_IV;
 			EVP_CIPHER_CTX * m_Ctx;	
 	};
 

libi2pd/Garlic.cpp

@@ -160,7 +160,7 @@ namespace garlic
 			uint8_t iv[32]; // IV is first 16 bytes
 			SHA256(elGamal.preIV, 32, iv);
 			m_Destination->Encrypt ((uint8_t *)&elGamal, buf);
-			m_Encryption.SetIV (iv);
+			m_IV = iv;
 			buf += 514;
 			len += 514;
 		}
@@ -170,7 +170,7 @@ namespace garlic
 			memcpy (buf, tag, 32);
 			uint8_t iv[32]; // IV is first 16 bytes
 			SHA256(tag, 32, iv);
-			m_Encryption.SetIV (iv);
+			m_IV = iv;
 			buf += 32;
 			len += 32;
 		}
@@ -210,7 +210,7 @@ namespace garlic
 		size_t rem = blockSize % 16;
 		if (rem)
 			blockSize += (16-rem); //padding
-		m_Encryption.Encrypt(buf, blockSize, buf);
+		m_Encryption.Encrypt(buf, blockSize, m_IV, buf);
 		return blockSize;
 	}
 
@@ -514,8 +514,7 @@ namespace garlic
 				{
 					uint8_t iv[32]; // IV is first 16 bytes
 					SHA256(buf, 32, iv);
-					decryption->SetIV (iv);
-					decryption->Decrypt (buf + 32, length - 32, buf + 32);
+					decryption->Decrypt (buf + 32, length - 32, iv, buf + 32);
 					HandleAESBlock (buf + 32, length - 32, decryption, msg->from);
 					found = true;
 				}
@@ -533,8 +532,7 @@ namespace garlic
 					auto decryption = std::make_shared<AESDecryption>(elGamal.sessionKey);
 					uint8_t iv[32]; // IV is first 16 bytes
 					SHA256(elGamal.preIV, 32, iv);
-					decryption->SetIV (iv);
-					decryption->Decrypt(buf + 514, length - 514, buf + 514);
+					decryption->Decrypt(buf + 514, length - 514, iv, buf + 514);
 					HandleAESBlock (buf + 514, length - 514, decryption, msg->from);
 				}
 				else if (SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD))

libi2pd/Garlic.h

@@ -205,6 +205,7 @@ namespace garlic
 			std::map<uint32_t, std::unique_ptr<UnconfirmedTags> > m_UnconfirmedTagsMsgs; // msgID->tags
 
 			i2p::crypto::CBCEncryption m_Encryption;
+			i2p::data::Tag<16> m_IV;
 
 		public:
 

libi2pd/NTCP2.cpp

@@ -120,8 +120,7 @@ namespace transport
 		// encrypt X
 		i2p::crypto::CBCEncryption encryption;
 		encryption.SetKey (m_RemoteIdentHash);
-		encryption.SetIV (m_IV);
-		encryption.Encrypt (GetPub (), 32, m_SessionRequestBuffer); // X
+		encryption.Encrypt (GetPub (), 32, m_IV, m_SessionRequestBuffer); // X
 		memcpy (m_IV, m_SessionRequestBuffer + 16, 16); // save last block as IV for SessionCreated
 		// encryption key for next block
 		if (!KDF1Alice ()) return false;
@@ -161,8 +160,7 @@ namespace transport
 		// encrypt Y
 		i2p::crypto::CBCEncryption encryption;
 		encryption.SetKey (i2p::context.GetIdentHash ());
-		encryption.SetIV (m_IV);
-		encryption.Encrypt (GetPub (), 32, m_SessionCreatedBuffer); // Y
+		encryption.Encrypt (GetPub (), 32, m_IV, m_SessionCreatedBuffer); // Y
 		// encryption key for next block (m_K)
 		if (!KDF2Bob ()) return false;
 		uint8_t options[16];
@@ -208,8 +206,7 @@ namespace transport
 		// decrypt X
 		i2p::crypto::CBCDecryption decryption;
 		decryption.SetKey (i2p::context.GetIdentHash ());
-		decryption.SetIV (i2p::context.GetNTCP2IV ());
-		decryption.Decrypt (m_SessionRequestBuffer, 32, GetRemotePub ());
+		decryption.Decrypt (m_SessionRequestBuffer, 32, i2p::context.GetNTCP2IV (), GetRemotePub ());
 		memcpy (m_IV, m_SessionRequestBuffer + 16, 16); // save last block as IV for SessionCreated
 		// decryption key for next block
 		if (!KDF1Bob ())
@@ -268,8 +265,7 @@ namespace transport
 		// decrypt Y
 		i2p::crypto::CBCDecryption decryption;
 		decryption.SetKey (m_RemoteIdentHash);
-		decryption.SetIV (m_IV);
-		decryption.Decrypt (m_SessionCreatedBuffer, 32, GetRemotePub ());
+		decryption.Decrypt (m_SessionCreatedBuffer, 32, m_IV, GetRemotePub ());
 		// decryption key for next block (m_K)
 		if (!KDF2Alice ())
 		{

libi2pd/TransitTunnel.cpp

@@ -434,8 +434,7 @@ namespace tunnel
 					else
 					{
 						encryption.SetKey (clearText + ECIES_BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET);
-						encryption.SetIV (clearText + ECIES_BUILD_REQUEST_RECORD_REPLY_IV_OFFSET);
-						encryption.Encrypt(reply, TUNNEL_BUILD_RECORD_SIZE, reply);
+						encryption.Encrypt(reply, TUNNEL_BUILD_RECORD_SIZE, clearText + ECIES_BUILD_REQUEST_RECORD_REPLY_IV_OFFSET, reply);
 					}
 				}
 				return true;

libi2pd/TunnelConfig.cpp

@@ -79,8 +79,7 @@ namespace tunnel
 		uint8_t * record = records + index*TUNNEL_BUILD_RECORD_SIZE;
 		i2p::crypto::CBCDecryption decryption;
 		decryption.SetKey (replyKey);
-		decryption.SetIV (replyIV);
-		decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
+		decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, replyIV, record);
 	}
 
 	void ECIESTunnelHopConfig::EncryptECIES (const uint8_t * plainText, size_t len, uint8_t * encrypted)

tests/CMakeLists.txt

@@ -65,6 +65,10 @@ set(test-eddsa_SRCS
   test-eddsa.cpp
 )
 
+set(test-aes_SRCS
+  test-aes.cpp
+)
+
 add_executable(test-http-merge_chunked ${test-http-merge_chunked_SRCS})
 add_executable(test-http-req ${test-http-req_SRCS})
 add_executable(test-http-res ${test-http-res_SRCS})
@@ -77,6 +81,7 @@ add_executable(test-aeadchacha20poly1305 ${test-aeadchacha20poly1305_SRCS})
 add_executable(test-blinding ${test-blinding_SRCS})
 add_executable(test-elligator ${test-elligator_SRCS})
 add_executable(test-eddsa ${test-eddsa_SRCS})
+add_executable(test-aes ${test-aes_SRCS})
 
 set(LIBS
   libi2pd
@@ -101,6 +106,7 @@ target_link_libraries(test-aeadchacha20poly1305 ${LIBS})
 target_link_libraries(test-blinding ${LIBS})
 target_link_libraries(test-elligator ${LIBS})
 target_link_libraries(test-eddsa ${LIBS})
+target_link_libraries(test-aes ${LIBS})
 
 add_test(test-http-merge_chunked ${TEST_PATH}/test-http-merge_chunked)
 add_test(test-http-req ${TEST_PATH}/test-http-req)
@@ -114,3 +120,4 @@ add_test(test-aeadchacha20poly1305 ${TEST_PATH}/test-aeadchacha20poly1305)
 add_test(test-blinding ${TEST_PATH}/test-blinding)
 add_test(test-elligator ${TEST_PATH}/test-elligator)
 add_test(test-eddsa ${TEST_PATH}/test-eddsa)
+add_test(test-aes ${TEST_PATH}/test-aes)

tests/Makefile

@@ -8,7 +8,7 @@ LIBI2PD = ../libi2pd.a
 TESTS = \
 	test-http-merge_chunked test-http-req test-http-res test-http-url test-http-url_decode \
 	test-gost test-gost-sig test-base-64 test-aeadchacha20poly1305 test-blinding \
-	test-elligator test-eddsa 
+	test-elligator test-eddsa test-aes
 
 ifneq (, $(findstring mingw, $(SYS))$(findstring windows-gnu, $(SYS))$(findstring cygwin, $(SYS)))
 	CXXFLAGS += -DWIN32_LEAN_AND_MEAN
@@ -56,6 +56,9 @@ test-elligator: test-elligator.cpp $(LIBI2PD)
 test-eddsa: test-eddsa.cpp $(LIBI2PD)
 	$(CXX) $(CXXFLAGS) $(NEEDED_CXXFLAGS) $(INCFLAGS) $(LDFLAGS) -o $@ $^ $(LDLIBS)
 
+test-aes: test-aes.cpp $(LIBI2PD)
+	$(CXX) $(CXXFLAGS) $(NEEDED_CXXFLAGS) $(INCFLAGS) $(LDFLAGS) -o $@ $^ $(LDLIBS)
+
 run: $(TESTS)
 	@for TEST in $(TESTS); do echo Running $$TEST; ./$$TEST ; done
 

tests/test-aes.cpp

@@ -0,0 +1,69 @@
+#include <cassert>
+#include <inttypes.h>
+#include <string.h>
+
+#include "Crypto.h"
+
+uint8_t ecb_key1[32] =
+{
+    0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe, 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
+    0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7, 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4
+};
+
+uint8_t ecb_plain1[16] =
+{
+    0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a
+};
+
+uint8_t ecb_cipher1[16] = 
+{
+    0xf3, 0xee, 0xd1, 0xbd, 0xb5, 0xd2, 0xa0, 0x3c, 0x06, 0x4b, 0x5a, 0x7e, 0x3d, 0xb1, 0x81, 0xf8
+};
+
+uint8_t cbc_key1[32] =
+{
+    0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe, 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
+    0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7, 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4
+};
+
+uint8_t cbc_iv1[16] =
+{
+    0xF5, 0x8C, 0x4C, 0x04, 0xD6, 0xE5, 0xF1, 0xBA, 0x77, 0x9E, 0xAB, 0xFB, 0x5F, 0x7B, 0xFB, 0xD6
+};
+
+uint8_t cbc_plain1[16] =
+{
+    0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51
+};
+
+uint8_t cbc_cipher1[16] = 
+{
+    0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d, 0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d
+};
+
+int main ()
+{
+    // ECB encrypt test1
+    i2p::crypto::ECBEncryption ecbencryption;
+    ecbencryption.SetKey (ecb_key1);
+    uint8_t out[16];
+    ecbencryption.Encrypt (ecb_plain1, out);
+    assert (memcmp (ecb_cipher1, out, 16) == 0);
+
+    // ECB decrypt test1
+    i2p::crypto::ECBDecryption ecbdecryption;
+    ecbdecryption.SetKey (ecb_key1);
+    ecbdecryption.Decrypt (ecb_cipher1, out);
+    assert (memcmp (ecb_plain1, out, 16) == 0);
+    // CBC encrypt test
+    i2p::crypto::CBCEncryption cbcencryption;
+    cbcencryption.SetKey (cbc_key1);
+    cbcencryption.Encrypt (cbc_plain1, 16, cbc_iv1, out);
+    assert (memcmp (cbc_cipher1, out, 16) == 0);
+    // CBC decrypt test
+    i2p::crypto::CBCDecryption cbcdecryption;
+    cbcdecryption.SetKey (cbc_key1);
+    cbcdecryption.Decrypt (cbc_cipher1, 16, cbc_iv1, out);
+    assert (memcmp (cbc_plain1, out, 16) == 0);
+}
+