Added Base64URLEncoder and decoder for web safe alphabet from RFC 4648, Section 5. Discussion at https://groups.google.com/d/msg/cryptopp-users/OF5RPXW-cHw/EDrOuA4-rRYJ

git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@563 57ff6487-cd31-0410-9ec3-f628ee90f5f0

1 files changed, 33 insertions, 4 deletions

diff --git a/base64.h b/base64.h
index 5a9e184..428b62c 100644
--- a/base64.h
+++ b/base64.h
@@ -5,7 +5,8 @@
 
 NAMESPACE_BEGIN(CryptoPP)
 
-//! Base64 Encoder Class 
+//! Base64 Encoder Class
+// https://tools.ietf.org/html/rfc4648#section-4
 class Base64Encoder : public SimpleProxyFilter
 {
 public:
@@ -14,19 +15,47 @@ public:
 	{
 		IsolatedInitialize(MakeParameters(Name::InsertLineBreaks(), insertLineBreaks)(Name::MaxLineLength(), maxLineLength));
 	}
-
+    
 	void IsolatedInitialize(const NameValuePairs &parameters);
 };
 
-//! Base64 Decoder Class 
+//! Base64 Decoder Class
+// https://tools.ietf.org/html/rfc4648#section-4
 class Base64Decoder : public BaseN_Decoder
 {
 public:
 	Base64Decoder(BufferedTransformation *attachment = NULL)
 		: BaseN_Decoder(GetDecodingLookupArray(), 6, attachment) {}
-
+    
 	void IsolatedInitialize(const NameValuePairs &parameters) {}
+    
+private:
+	static const int * CRYPTOPP_API GetDecodingLookupArray();
+};
+
+//! Base64 URL Encoder Class
+// https://tools.ietf.org/html/rfc4648#section-5
+class Base64URLEncoder : public SimpleProxyFilter
+{
+public:
+	Base64URLEncoder(BufferedTransformation *attachment = NULL, bool insertLineBreaks = false, int maxLineLength = -1)
+		: SimpleProxyFilter(new BaseN_Encoder(new Grouper), attachment)
+	{
+		IsolatedInitialize(MakeParameters(Name::InsertLineBreaks(), insertLineBreaks)(Name::MaxLineLength(), maxLineLength));
+	}
+    
+	void IsolatedInitialize(const NameValuePairs &parameters);
+};
 
+//! Base64 URL Decoder Class
+class Base64URLDecoder : public BaseN_Decoder
+{
+public:
+	Base64URLDecoder(BufferedTransformation *attachment = NULL)
+		: BaseN_Decoder(GetDecodingLookupArray(), 6, attachment) {}
+    
+	void IsolatedInitialize(const NameValuePairs &parameters) {}
+    
 private:
 	static const int * CRYPTOPP_API GetDecodingLookupArray();
 };