Add tool for creating argon2 hased passwords.

6 files changed, 292 insertions, 1 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index c8a6560..750fb7c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,6 +1,19 @@
 SUBDIRS = ws
 
-bin_PROGRAMS = muniad muniacli
+noinst_LTLIBRARIES = libargon2.la
+
+bin_PROGRAMS = muniad muniacli muniapwd
+
+libargon2_la_CFLAGS = \
+	-DARGON2_NO_THREADS -I$(top_srcdir)/argon2/include
+
+libargon2_la_SOURCES = \
+	$(top_srcdir)/argon2/src/argon2.c \
+	$(top_srcdir)/argon2/src/core.c \
+	$(top_srcdir)/argon2/src/blake2/blake2b.c \
+	$(top_srcdir)/argon2/src/thread.c \
+	$(top_srcdir)/argon2/src/encoding.c \
+	$(top_srcdir)/argon2/src/ref.c
 
 muniad_LDADD = $(LIBWEBSOCKETS_LIBS) $(EXPAT_LIBS)
 
@@ -29,6 +42,18 @@ muniacli_CXXFLAGS = $(LIBWEBSOCKETS_CFLAGS) -I$(top_srcdir)/hugin
 muniacli_SOURCES = \
 	muniacli.cc
 
+muniapwd_LDADD = libargon2.la
+
+muniapwd_CXXFLAGS = \
+	-std=c++11 \
+	$(LIBWEBSOCKETS_CFLAGS) \
+	-I$(top_srcdir)/argon2/include
+
+muniapwd_SOURCES = \
+	muniapwd.cc \
+	salt.cc \
+	hash.cc
+
 EXTRA_DIST = \
 	connectionhandler.h \
 	errorcodes.h \
diff --git a/src/hash.cc b/src/hash.cc
new file mode 100644
index 0000000..5b67d92
--- /dev/null
+++ b/src/hash.cc
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            hash.cc
+ *
+ *  Sun Jul  5 10:37:32 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Munia.
+ *
+ *  Munia is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Munia is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Munia; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "hash.h"
+
+#include <cstdint>
+#include <vector>
+
+#include <argon2.h>
+
+std::string getEncoded(const Salt& salt, const std::string& password)
+{
+	constexpr std::size_t hashlen = 32u;
+	constexpr std::uint32_t t_cost = 10;        // 10-pass computation
+	constexpr std::uint32_t m_cost = (1 << 16); // 64 mebibytes memory usage
+	constexpr std::uint32_t parallelism = 1;    // number of threads and lanes
+
+	auto encodedlen = argon2_encodedlen(t_cost, m_cost, parallelism,
+	                                    salt.size(), hashlen, Argon2_i);
+	std::vector<char> encoded(encodedlen, '\0');
+	auto ret = argon2i_hash_encoded(t_cost, m_cost, parallelism,
+	                                password.data(), password.length(),
+	                                salt.data(), salt.size(),
+	                                hashlen,
+	                                encoded.data(), encoded.size());
+	if(ret != ARGON2_OK)
+	{
+		throw "Argon2 encoding error.";
+	}
+
+	// convert vector<char> to string
+	std::string s;
+	s.reserve(encoded.size());
+	for(const auto& e : encoded)
+	{
+		s += e;
+	}
+
+	return s;
+}
+
+bool verifyEncoded(const std::string& encoded, const std::string& password)
+{
+	auto ret = argon2i_verify(encoded.data(), password.data(), password.length());
+	return ret == ARGON2_OK;
+}
diff --git a/src/hash.h b/src/hash.h
new file mode 100644
index 0000000..6f73f97
--- /dev/null
+++ b/src/hash.h
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            hash.h
+ *
+ *  Sun Jul  5 10:37:32 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Munia.
+ *
+ *  Munia is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Munia is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Munia; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include <string>
+
+#include "salt.h"
+
+std::string getEncoded(const Salt& salt, const std::string& password);
+bool verifyEncoded(const std::string& encoded, const std::string& password);
diff --git a/src/muniapwd.cc b/src/muniapwd.cc
new file mode 100644
index 0000000..26b8eeb
--- /dev/null
+++ b/src/muniapwd.cc
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            muniapwd.cc
+ *
+ *  Sun Jul  5 09:22:22 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Munia.
+ *
+ *  Munia is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Munia is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Munia; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include <unistd.h>
+
+#include "salt.h"
+#include "hash.h"
+
+int main(int argc, char* argv[])
+{
+	if(argc != 2)
+	{
+		printf("Usage: %s <username>\n", argv[0]);
+		return 1;
+	}
+
+	const char* user = argv[1];
+
+	std::string password = getpass("Type password: ");
+	std::string passwordAgain = getpass("Type password (again): ");
+	if(password != passwordAgain)
+	{
+		printf("Passwords don't match.\n");
+		return 1;
+	}
+
+	try
+	{
+		auto encoded = getEncoded(getSalt(), password);
+		printf("%s:%s\n", user, encoded.data());
+
+		if(verifyEncoded(encoded, password))
+		{
+			printf("Verification ok\n");
+		}
+		else
+		{
+			printf("Verification failed\n");
+			return 1;
+		}
+	}
+	catch(char* msg)
+	{
+		printf("Error: %s\n", msg);
+		return 1;
+	}
+
+	return 0;
+}
diff --git a/src/salt.cc b/src/salt.cc
new file mode 100644
index 0000000..46eb94a
--- /dev/null
+++ b/src/salt.cc
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            salt.cc
+ *
+ *  Sun Jul  5 14:34:25 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Munia.
+ *
+ *  Munia is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Munia is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Munia; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "salt.h"
+
+#define _GNU_SOURCE 1
+#include <linux/random.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <unistd.h>
+//#include <errno.h>
+
+Salt getSalt()
+{
+	Salt salt(16, '\0');
+
+	auto ret = syscall(SYS_getrandom, salt.data(), salt.size(), 1);
+	if(ret == -1)
+	{
+		throw "Could not get random bytes for salt"; // strerror(errno));
+	}
+
+	if(ret != (int)salt.size())
+	{
+		throw "Not enough entropy.";
+	}
+
+	return salt;
+}
diff --git a/src/salt.h b/src/salt.h
new file mode 100644
index 0000000..0982b46
--- /dev/null
+++ b/src/salt.h
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            salt.h
+ *
+ *  Sun Jul  5 14:34:25 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Munia.
+ *
+ *  Munia is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Munia is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Munia; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include <vector>
+#include <cstdint>
+
+using Salt = std::vector<std::uint8_t>;
+
+Salt getSalt();