1 files changed, 53 insertions, 0 deletions
diff --git a/lib/base/base64.cpp b/lib/base/base64.cpp
new file mode 100644
index 0000000..42999c3
--- /dev/null
+++ b/lib/base/base64.cpp
@@ -0,0 +1,53 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#include "base/base64.hpp"
+#include <openssl/bio.h>
+#include <openssl/evp.h>
+#include <openssl/buffer.h>
+#include <sstream>
+
+using namespace icinga;
+
+String Base64::Encode(const String& input)
+{
+	BIO *biomem = BIO_new(BIO_s_mem());
+	BIO *bio64 = BIO_new(BIO_f_base64());
+	BIO_push(bio64, biomem);
+	BIO_set_flags(bio64, BIO_FLAGS_BASE64_NO_NL);
+	BIO_write(bio64, input.CStr(), input.GetLength());
+	(void) BIO_flush(bio64);
+
+	char *outbuf;
+	long len = BIO_get_mem_data(biomem, &outbuf);
+
+	String ret = String(outbuf, outbuf + len);
+	BIO_free_all(bio64);
+
+	return ret;
+}
+
+String Base64::Decode(const String& input)
+{
+	BIO *biomem = BIO_new_mem_buf(
+		const_cast<char*>(input.CStr()), input.GetLength());
+	BIO *bio64 = BIO_new(BIO_f_base64());
+	BIO_push(bio64, biomem);
+	BIO_set_flags(bio64, BIO_FLAGS_BASE64_NO_NL);
+
+	auto *outbuf = new char[input.GetLength()];
+
+	size_t len = 0;
+	int rc;
+
+	while ((rc = BIO_read(bio64, outbuf + len, input.GetLength() - len)) > 0)
+		len += rc;
+
+	String ret = String(outbuf, outbuf + len);
+	BIO_free_all(bio64);
+	delete [] outbuf;
+
+	if (ret.IsEmpty() && !input.IsEmpty())
+		throw std::invalid_argument("Not a valid base64 string");
+
+	return ret;
+}