Have crypto available from C with C++ bindings via header only

1 files changed, 56 insertions, 0 deletions

diff --git a/src/uscxml/util/SHA1.hpp b/src/uscxml/util/SHA1.hpp
new file mode 100644
index 0000000..61df5db
--- /dev/null
+++ b/src/uscxml/util/SHA1.hpp
@@ -0,0 +1,56 @@
+/**
+ *  @file
+ *  @author     2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
+ *  @copyright  Simplified BSD
+ *
+ *  @cond
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the FreeBSD license as published by the FreeBSD
+ *  project.
+ *
+ *  This program 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.
+ *
+ *  You should have received a copy of the FreeBSD license along with this
+ *  program. If not, see <http://www.opensource.org/licenses/bsd-license>.
+ *  @endcond
+ */
+
+#ifndef SHA1_HPP_XJADWV5G
+#define SHA1_HPP_XJADWV5G
+
+extern "C" {
+#include "SHA1.h"
+}
+
+#include <string.h>
+#include <iostream>
+#include <sstream>
+#include <iomanip>
+#include "uscxml/Common.h"
+
+namespace uscxml {
+    USCXML_API inline std::string sha1(const char* data, size_t length) {
+        SHA1Context sha;
+        SHA1Reset(&sha);
+        SHA1Input(&sha, (const unsigned char*)data, length);
+        if (!SHA1Result(&sha)) {
+            return "";
+        } else {
+        	std::ostringstream ss;
+        	ss << std::hex << std::uppercase << std::setfill( '0' );
+        	for (int i = 0; i < 5; i++) {
+        		ss << std::setw( 2 ) << sha.Message_Digest[i];
+        	}
+
+        	return ss.str();
+        }
+    }
+
+    USCXML_API inline std::string sha1(const std::string& data) {
+    	return sha1(data.data(), data.size());
+    }
+}
+
+#endif /* end of include guard: SHA1_HPP_XJADWV5G */