From 7dc04d52f7e3608b42c0a3498b336826ee875112 Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Fri, 8 Feb 2019 14:53:58 -0500
Subject: [PATCH] offline keys added

---
 Makefile        |  7 +++--
 keyinfo.cpp     |  1 +
 offlinekeys.cpp | 70 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+), 2 deletions(-)
 create mode 100644 offlinekeys.cpp

diff --git a/Makefile b/Makefile
index 7b8b3ec..75ee3f4 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,7 @@ OBJECTS = $(SOURCES:.cpp=.o)
 I2PD_LIB = libi2pd.a
 
 
-all: keygen keyinfo famtool routerinfo regaddr regaddr_3ld vain i2pbase64
+all: keygen keyinfo famtool routerinfo regaddr regaddr_3ld vain i2pbase64 offlinekeys
 
 routerinfo: $(OBJECTS)
 	$(CXX) -o routerinfo routerinfo.o $(LDFLAGS)  $(LIBS)
@@ -70,6 +70,9 @@ vain: $(OBJECTS)
 i2pbase64: $(OBJECTS)
 	$(CXX) -o i2pbase64 i2pbase64.o $(LDFLAGS) $(LIBS)
 
+offlinekeys: $(OBJECTS)
+	$(CXX) -o offlinekeys offlinekeys.o $(LDFLAGS) $(LIBS)
+
 $(OBJECTS): libi2pd.a
 
 .SUFFIXES:
@@ -91,7 +94,7 @@ clean-obj:
 	rm -f $(OBJECTS)
 
 clean-bin:
-	rm -f keyinfo keygen famtool regaddr regaddr_3ld routerinfo i2pbase64 vain
+	rm -f keyinfo keygen famtool regaddr regaddr_3ld routerinfo i2pbase64 vain offlinekeys
 
 
 clean: clean-i2pd clean-obj clean-bin
diff --git a/keyinfo.cpp b/keyinfo.cpp
index 25d4d23..a2e236b 100644
--- a/keyinfo.cpp
+++ b/keyinfo.cpp
@@ -62,6 +62,7 @@ int main(int argc, char * argv[])
     std::cout << "B32 Address: " << ident.ToBase32() << ".b32.i2p" << std::endl;
     std::cout << "Signature Type: " << SigTypeToName(dest->GetSigningKeyType()) << std::endl;
     std::cout << "Encryption Type: " << (int) dest->GetCryptoKeyType() << std::endl;
+	if (keys.IsOfflineSignature ()) std::cout << "Offline signature" << std::endl;
   } else {
     if(print_full) {
       std::cout << dest->ToBase64() << std::endl;
diff --git a/offlinekeys.cpp b/offlinekeys.cpp
new file mode 100644
index 0000000..dac8112
--- /dev/null
+++ b/offlinekeys.cpp
@@ -0,0 +1,70 @@
+#include <iostream>
+#include <fstream>
+#include <stdlib.h>
+#include <inttypes.h>
+#include "Crypto.h"
+#include "Identity.h"
+#include "Timestamp.h"
+#include "common/key.hpp"
+
+int main (int argc, char * argv[])
+{
+	if (argc < 3)
+	{
+		std::cout << "Usage: offlinekeys <output file> <keys file> <signature type> <days>" << std::endl;
+		return -1;
+	}
+	i2p::crypto::InitCrypto (false);
+
+	std::string fname(argv[2]);
+	i2p::data::PrivateKeys keys;
+	{
+		std::vector<uint8_t> buff;
+		std::ifstream inf;
+		inf.open(fname);
+		if (!inf.is_open()) {
+		  std::cout << "cannot open keys file " << fname << std::endl;
+		  return 2;
+		}
+		inf.seekg(0, std::ios::end);
+		const std::size_t len = inf.tellg();
+		inf.seekg(0, std::ios::beg);
+		buff.resize(len);
+		inf.read((char*)buff.data(), buff.size());
+		if (!keys.FromBuffer(buff.data(), buff.size())) {
+		  std::cout << "bad keys file format" << std::endl;
+		  return 3;
+		}
+	}	
+
+	i2p::data::SigningKeyType type = i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519; // EdDSA by default
+	if (argc > 3) 
+	{
+		std::string str(argv[3]);
+		type = NameToSigType(str);
+	}
+
+	int days = 365; // 1 year by default
+	if (argc > 4)
+		days = std::stoi (argv[4]);	
+	uint32_t expires = i2p::util::GetSecondsSinceEpoch () + days*24*60*60;
+	
+	auto offlineKeys = keys.CreateOfflineKeys (type, expires);	
+	std::ofstream f (argv[1], std::ofstream::binary | std::ofstream::out);
+	if (f)
+	{
+		size_t len = offlineKeys.GetFullLen ();
+		uint8_t * buf = new uint8_t[len];
+		len = offlineKeys.ToBuffer (buf, len);
+		f.write ((char *)buf, len);
+		delete[] buf;
+		std::cout << "Offline keys for destination " << offlineKeys.GetPublic ()->GetIdentHash ().ToBase32 () << " created" << std::endl;
+	}
+	else
+		std::cout << "Can't create file " << argv[1] << std::endl;	
+
+	i2p::crypto::TerminateCrypto ();
+
+	return 0;
+}
+