Merge pull request #68 from acetoneRu/master

x25519 tool

Makefile

@@ -41,7 +41,7 @@ else
 	LDFLAGS += -s -Wl,-Bstatic -static-libgcc -static-libstdc++
 endif
 
-all: $(I2PD_LIB) keygen keyinfo famtool routerinfo regaddr regaddr_3ld vain i2pbase64 offlinekeys b33address regaddralias
+all: $(I2PD_LIB) keygen keyinfo famtool routerinfo regaddr regaddr_3ld vain i2pbase64 offlinekeys b33address regaddralias x25519
 
 routerinfo: routerinfo.o $(I2PD_LIB)
 	$(CXX) -o routerinfo routerinfo.o $(LDFLAGS) $(LIBS)
@@ -75,6 +75,9 @@ b33address: b33address.o $(I2PD_LIB)
 
 regaddralias: regaddralias.o $(I2PD_LIB)
 	$(CXX) -o regaddralias regaddralias.o $(LDFLAGS) $(LIBS)
+	
+x25519: x25519.o $(I2PD_LIB)
+	$(CXX) -o x25519 x25519.o $(LDFLAGS) $(LIBS)
 
 .SUFFIXES:
 .SUFFIXES: .c .cc .C .cpp .o
@@ -95,7 +98,7 @@ clean-obj:
 	rm -f $(wildcard *.o)
 
 clean-bin:
-	rm -f b33address famtool i2pbase64 keygen keyinfo offlinekeys regaddr regaddr_3ld regaddralias routerinfo vain
+	rm -f b33address famtool i2pbase64 keygen keyinfo offlinekeys regaddr regaddr_3ld regaddralias routerinfo vain x25519
 
 clean: clean-i2pd clean-obj clean-bin
 

x25519.cpp

@@ -0,0 +1,77 @@
+#include <openssl/evp.h> 
+#include <openssl/bn.h>
+#include <iostream>
+#include <string>
+#include <iomanip>
+#include "Base.h"
+
+#define KEYSIZE 32
+size_t len = KEYSIZE;
+
+struct BoxKeys
+{
+    uint8_t PublicKey[KEYSIZE];
+    uint8_t PrivateKey[KEYSIZE];
+};
+
+BoxKeys getKeyPair()
+{
+    BoxKeys keys;
+
+    EVP_PKEY_CTX * Ctx;
+    EVP_PKEY * Pkey = nullptr;
+    Ctx = EVP_PKEY_CTX_new_id (NID_X25519, NULL);
+
+    EVP_PKEY_keygen_init (Ctx);
+    EVP_PKEY_keygen (Ctx, &Pkey);
+
+    EVP_PKEY_get_raw_public_key (Pkey, keys.PublicKey, &len);
+    EVP_PKEY_get_raw_private_key (Pkey, keys.PrivateKey, &len);
+
+    EVP_PKEY_CTX_free(Ctx);
+    EVP_PKEY_free(Pkey);
+
+    return keys;
+}
+
+int main(int argc, char * argv[])
+{
+    if (argc > 1)
+    {
+        std::string arg = static_cast<std::string>(argv[1]);
+        if (arg == "--usage" || arg == "--help" || arg == "-h")
+        {
+            std::cout << "The x25519 keys are used for authentication with an encrypted LeaseSet.\n"
+            << "Server side:\n"
+            << "  signaturetype = 11\n"
+            << "  i2cp.leaseSetType = 5\n"
+            << "  i2cp.leaseSetAuthType = 1\n"
+            << "  i2cp.leaseSetClient.dh.210 = clientName:PublicKey\n"
+            << "Client side:\n"
+            << "  i2cp.leaseSetPrivKey = PrivateKey\n\n"
+            << "https://i2pd.readthedocs.io/en/latest/user-guide/tunnels/" << std::endl;
+
+            return 0;
+        }
+    }
+
+    BoxKeys newKeys = getKeyPair();
+
+    size_t len_out = 50;
+    char b64Public[len_out] = {0};
+    char b64Private[len_out] = {0};
+
+    i2p::data::ByteStreamToBase64 (newKeys.PublicKey, len, b64Public, len_out);
+
+    std::cout << "PublicKey: ";
+    for (int i = 0; b64Public[i] != 0; ++i)
+        std::cout << b64Public[i];
+
+    i2p::data::ByteStreamToBase64 (newKeys.PrivateKey, len, b64Private, len_out);
+
+    std::cout << "\nPrivateKey: ";
+    for (int i = 0; b64Private[i] != 0; ++i)
+        std::cout << b64Private[i];
+
+    return 0;
+}