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| -rw-r--r-- | base32.cpp | 39 | ||||
| -rw-r--r-- | base32.h | 38 |
2 files changed, 77 insertions, 0 deletions
diff --git a/base32.cpp b/base32.cpp new file mode 100644 index 0000000..56bce6e --- /dev/null +++ b/base32.cpp @@ -0,0 +1,39 @@ +// base32.cpp - written and placed in the public domain by Frank Palazzolo, based on hex.cpp by Wei Dai + +#include "pch.h" +#include "base32.h" + +NAMESPACE_BEGIN(CryptoPP) + +static const byte s_vecUpper[] = "ABCDEFGHIJKMNPQRSTUVWXYZ23456789"; +static const byte s_vecLower[] = "abcdefghijkmnpqrstuvwxyz23456789"; + +void Base32Encoder::IsolatedInitialize(const NameValuePairs ¶meters) +{ + bool uppercase = parameters.GetValueWithDefault(Name::Uppercase(), true); + m_filter->Initialize(CombinedNameValuePairs( + parameters, + MakeParameters(Name::EncodingLookupArray(), uppercase ? &s_vecUpper[0] : &s_vecLower[0], false)(Name::Log2Base(), 5, true))); +} + +void Base32Decoder::IsolatedInitialize(const NameValuePairs ¶meters) +{ + BaseN_Decoder::Initialize(CombinedNameValuePairs( + parameters, + MakeParameters(Name::DecodingLookupArray(), GetDefaultDecodingLookupArray(), false)(Name::Log2Base(), 5, true))); +} + +const int *Base32Decoder::GetDefaultDecodingLookupArray() +{ + static bool s_initialized = false; + static int s_array[256]; + + if (!s_initialized) + { + InitializeDecodingLookupArray(s_array, s_vecUpper, 32, true); + s_initialized = true; + } + return s_array; +} + +NAMESPACE_END diff --git a/base32.h b/base32.h new file mode 100644 index 0000000..64b572f --- /dev/null +++ b/base32.h @@ -0,0 +1,38 @@ +#ifndef CRYPTOPP_BASE32_H +#define CRYPTOPP_BASE32_H + +#include "basecode.h" + +NAMESPACE_BEGIN(CryptoPP) + +//! Converts given data to base 32, the default code is based on draft-ietf-idn-dude-02.txt +/*! To specify alternative code, call Initialize() with EncodingLookupArray parameter. */ +class Base32Encoder : public SimpleProxyFilter +{ +public: + Base32Encoder(BufferedTransformation *attachment = NULL, bool uppercase = true, int outputGroupSize = 0, const std::string &separator = ":", const std::string &terminator = "") + : SimpleProxyFilter(new BaseN_Encoder(new Grouper), attachment) + { + IsolatedInitialize(MakeParameters(Name::Uppercase(), uppercase)(Name::GroupSize(), outputGroupSize)(Name::Separator(), ConstByteArrayParameter(separator))); + } + + void IsolatedInitialize(const NameValuePairs ¶meters); +}; + +//! Decode base 32 data back to bytes, the default code is based on draft-ietf-idn-dude-02.txt +/*! To specify alternative code, call Initialize() with DecodingLookupArray parameter. */ +class Base32Decoder : public BaseN_Decoder +{ +public: + Base32Decoder(BufferedTransformation *attachment = NULL) + : BaseN_Decoder(GetDefaultDecodingLookupArray(), 5, attachment) {} + + void IsolatedInitialize(const NameValuePairs ¶meters); + +private: + static const int *GetDefaultDecodingLookupArray(); +}; + +NAMESPACE_END + +#endif |