71 lines
3.1 KiB
C++
71 lines
3.1 KiB
C++
// base32.h - written and placed in the public domain by Wei Dai
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//! \file
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//! \brief Classes for Base32Encoder and Base32Decoder
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#ifndef CRYPTOPP_BASE32_H
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#define CRYPTOPP_BASE32_H
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#include "cryptlib.h"
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#include "basecode.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! \class Base32Encoder
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//! \brief Base32 encodes data
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//! \details Converts data to base32. The default code is based on draft-ietf-idn-dude-02.txt.
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//! \details To specify alternative alpahabet or code, call Initialize() with EncodingLookupArray parameter.
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class Base32Encoder : public SimpleProxyFilter
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{
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public:
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//! \brief Construct a Base32Encoder
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//! \param attachment a BufferedTrasformation to attach to this object
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//! \param uppercase a flag indicating uppercase output
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//! \param groupSize the size of the grouping
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//! \param separator the separator to use between groups
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//! \param terminator the terminator appeand after processing
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//! \details Base32Encoder() constructs a default encoder. The constructor lacks fields for padding and
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//! line breaks. You must use IsolatedInitialize() to change the default padding character or suppress it.
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//! \sa IsolatedInitialize() for an example of modifying a Base32Encoder after construction.
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Base32Encoder(BufferedTransformation *attachment = NULL, bool uppercase = true, int groupSize = 0, const std::string &separator = ":", const std::string &terminator = "")
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: SimpleProxyFilter(new BaseN_Encoder(new Grouper), attachment)
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{
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IsolatedInitialize(MakeParameters(Name::Uppercase(), uppercase)(Name::GroupSize(), groupSize)(Name::Separator(), ConstByteArrayParameter(separator))(Name::Terminator(), ConstByteArrayParameter(terminator)));
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}
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//! \brief Initialize or reinitialize this object, without signal propagation
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//! \param parameters a set of NameValuePairs used to initialize this object
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//! \details IsolatedInitialize() is used to initialize or reinitialize an object using a variable
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//! number of arbitrarily typed arguments. IsolatedInitialize() does not call Initialize() on attached
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//! transformations. If initialization should be propagated, then use the Initialize() function.
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//! \details The following code modifies the padding and line break parameters for an encoder:
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//! <pre>
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//! Base32Encoder encoder;
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//! AlgorithmParameters params = MakeParameters(Pad(), false)(InsertLineBreaks(), false);
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//! encoder.IsolatedInitialize(params);
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//! </pre>
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void IsolatedInitialize(const NameValuePairs ¶meters);
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};
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//! \class Base32Decoder
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//! \brief Base32 decodes data
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//! \details Decode base32 data. The default code is based on draft-ietf-idn-dude-02.txt
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//! \details To specify alternative alpahabet or code, call Initialize() with EncodingLookupArray parameter.
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class Base32Decoder : public BaseN_Decoder
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{
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public:
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//! \brief Construct a Base32Decoder
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//! \param attachment a BufferedTrasformation to attach to this object
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Base32Decoder(BufferedTransformation *attachment = NULL)
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: BaseN_Decoder(GetDefaultDecodingLookupArray(), 5, attachment) {}
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void IsolatedInitialize(const NameValuePairs ¶meters);
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private:
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static const int * CRYPTOPP_API GetDefaultDecodingLookupArray();
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};
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NAMESPACE_END
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#endif
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