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

1 files changed, 46 insertions, 0 deletions

diff --git a/src/uscxml/util/Base64.hpp b/src/uscxml/util/Base64.hpp
new file mode 100644
index 0000000..a106a12
--- /dev/null
+++ b/src/uscxml/util/Base64.hpp
@@ -0,0 +1,46 @@
+// taken from http://www.adp-gmbh.ch/cpp/common/base64.html
+#ifndef BASE64_H_5FKG12HF
+#define BASE64_H_5FKG12HF
+
+extern "C" {
+#include "Base64.h"
+}
+
+#include <stdlib.h>
+#include <string>
+#include "uscxml/Common.h"
+
+namespace uscxml {
+
+USCXML_API inline std::string base64Encode(const char* data, unsigned int len) {
+	base64_encodestate* ctx = (base64_encodestate*)malloc(sizeof(base64_encodestate));
+	base64_init_encodestate(ctx);
+	
+	/**
+	 * Wikipedia: Very roughly, the final size of Base64-encoded binary data is equal to 1.37
+	 * times the original data size + 814 bytes (for headers). The size of the decoded data can
+	 * be approximated with this formula:
+	 */
+	
+	char* out = (char*)malloc(len * 1.4 + 814);
+	base64_encode_block(data, len, out, ctx);
+	free(ctx);
+	std::string result(out);
+	free(out);
+	return result;
+}
+
+USCXML_API inline std::string base64Decode(const std::string& data) {
+	base64_decodestate* ctx = (base64_decodestate*)malloc(sizeof(base64_decodestate));
+	base64_init_decodestate(ctx);
+	
+	char* out = (char*)malloc(data.size());
+	base64_decode_block(data.data(), data.size(), out, ctx);
+	free(ctx);
+	std::string result(out);
+	free(out);
+	return result;
+}
+
+}
+#endif /* end of include guard: BASE64_H_5FKG12HF */