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-rw-r--r--CryptoPP/basecode.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/CryptoPP/basecode.h b/CryptoPP/basecode.h
new file mode 100644
index 000000000..cc44c4342
--- /dev/null
+++ b/CryptoPP/basecode.h
@@ -0,0 +1,86 @@
+#ifndef CRYPTOPP_BASECODE_H
+#define CRYPTOPP_BASECODE_H
+
+#include "filters.h"
+#include "algparam.h"
+#include "argnames.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! base n encoder, where n is a power of 2
+class CRYPTOPP_DLL BaseN_Encoder : public Unflushable<Filter>
+{
+public:
+ BaseN_Encoder(BufferedTransformation *attachment=NULL)
+ {Detach(attachment);}
+
+ BaseN_Encoder(const byte *alphabet, int log2base, BufferedTransformation *attachment=NULL, int padding=-1)
+ {
+ Detach(attachment);
+ IsolatedInitialize(MakeParameters(Name::EncodingLookupArray(), alphabet)
+ (Name::Log2Base(), log2base)
+ (Name::Pad(), padding != -1)
+ (Name::PaddingByte(), byte(padding)));
+ }
+
+ void IsolatedInitialize(const NameValuePairs &parameters);
+ size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
+
+private:
+ const byte *m_alphabet;
+ int m_padding, m_bitsPerChar, m_outputBlockSize;
+ int m_bytePos, m_bitPos;
+ SecByteBlock m_outBuf;
+};
+
+//! base n decoder, where n is a power of 2
+class CRYPTOPP_DLL BaseN_Decoder : public Unflushable<Filter>
+{
+public:
+ BaseN_Decoder(BufferedTransformation *attachment=NULL)
+ {Detach(attachment);}
+
+ BaseN_Decoder(const int *lookup, int log2base, BufferedTransformation *attachment=NULL)
+ {
+ Detach(attachment);
+ IsolatedInitialize(MakeParameters(Name::DecodingLookupArray(), lookup)(Name::Log2Base(), log2base));
+ }
+
+ void IsolatedInitialize(const NameValuePairs &parameters);
+ size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
+
+ static void CRYPTOPP_API InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive);
+
+private:
+ const int *m_lookup;
+ int m_padding, m_bitsPerChar, m_outputBlockSize;
+ int m_bytePos, m_bitPos;
+ SecByteBlock m_outBuf;
+};
+
+//! filter that breaks input stream into groups of fixed size
+class CRYPTOPP_DLL Grouper : public Bufferless<Filter>
+{
+public:
+ Grouper(BufferedTransformation *attachment=NULL)
+ {Detach(attachment);}
+
+ Grouper(int groupSize, const std::string &separator, const std::string &terminator, BufferedTransformation *attachment=NULL)
+ {
+ Detach(attachment);
+ IsolatedInitialize(MakeParameters(Name::GroupSize(), groupSize)
+ (Name::Separator(), ConstByteArrayParameter(separator))
+ (Name::Terminator(), ConstByteArrayParameter(terminator)));
+ }
+
+ void IsolatedInitialize(const NameValuePairs &parameters);
+ size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
+
+private:
+ SecByteBlock m_separator, m_terminator;
+ size_t m_groupSize, m_counter;
+};
+
+NAMESPACE_END
+
+#endif