1 files changed, 42 insertions, 0 deletions

diff --git a/lib/cryptopp/base64.cpp b/lib/cryptopp/base64.cpp
new file mode 100644
index 000000000..7571f2b8c
--- /dev/null
+++ b/lib/cryptopp/base64.cpp
@@ -0,0 +1,42 @@
+// base64.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+#include "base64.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+static const byte s_vec[] =
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const byte s_padding = '=';
+
+void Base64Encoder::IsolatedInitialize(const NameValuePairs &parameters)
+{
+	bool insertLineBreaks = parameters.GetValueWithDefault(Name::InsertLineBreaks(), true);
+	int maxLineLength = parameters.GetIntValueWithDefault(Name::MaxLineLength(), 72);
+
+	const char *lineBreak = insertLineBreaks ? "\n" : "";
+	
+	m_filter->Initialize(CombinedNameValuePairs(
+		parameters,
+		MakeParameters(Name::EncodingLookupArray(), &s_vec[0], false)
+			(Name::PaddingByte(), s_padding)
+			(Name::GroupSize(), insertLineBreaks ? maxLineLength : 0)
+			(Name::Separator(), ConstByteArrayParameter(lineBreak))
+			(Name::Terminator(), ConstByteArrayParameter(lineBreak))
+			(Name::Log2Base(), 6, true)));
+}
+
+const int *Base64Decoder::GetDecodingLookupArray()
+{
+	static volatile bool s_initialized = false;
+	static int s_array[256];
+
+	if (!s_initialized)
+	{
+		InitializeDecodingLookupArray(s_array, s_vec, 64, false);
+		s_initialized = true;
+	}
+	return s_array;
+}
+
+NAMESPACE_END