399 lines
12 KiB
C++
399 lines
12 KiB
C++
#ifndef CRYPTOPP_ALGPARAM_H
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#define CRYPTOPP_ALGPARAM_H
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#include "cryptlib.h"
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#include "smartptr.h"
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#include "secblock.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! used to pass byte array input as part of a NameValuePairs object
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/*! the deepCopy option is used when the NameValuePairs object can't
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keep a copy of the data available */
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class ConstByteArrayParameter
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{
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public:
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ConstByteArrayParameter(const char *data = NULL, bool deepCopy = false)
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{
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Assign((const byte *)data, data ? strlen(data) : 0, deepCopy);
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}
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ConstByteArrayParameter(const byte *data, size_t size, bool deepCopy = false)
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{
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Assign(data, size, deepCopy);
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}
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template <class T> ConstByteArrayParameter(const T &string, bool deepCopy = false)
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{
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CRYPTOPP_COMPILE_ASSERT(sizeof(CPP_TYPENAME T::value_type) == 1);
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Assign((const byte *)string.data(), string.size(), deepCopy);
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}
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void Assign(const byte *data, size_t size, bool deepCopy)
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{
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if (deepCopy)
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m_block.Assign(data, size);
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else
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{
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m_data = data;
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m_size = size;
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}
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m_deepCopy = deepCopy;
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}
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const byte *begin() const {return m_deepCopy ? m_block.begin() : m_data;}
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const byte *end() const {return m_deepCopy ? m_block.end() : m_data + m_size;}
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size_t size() const {return m_deepCopy ? m_block.size() : m_size;}
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private:
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bool m_deepCopy;
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const byte *m_data;
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size_t m_size;
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SecByteBlock m_block;
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};
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class ByteArrayParameter
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{
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public:
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ByteArrayParameter(byte *data = NULL, unsigned int size = 0)
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: m_data(data), m_size(size) {}
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ByteArrayParameter(SecByteBlock &block)
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: m_data(block.begin()), m_size(block.size()) {}
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byte *begin() const {return m_data;}
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byte *end() const {return m_data + m_size;}
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size_t size() const {return m_size;}
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private:
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byte *m_data;
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size_t m_size;
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};
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class CRYPTOPP_DLL CombinedNameValuePairs : public NameValuePairs
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{
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public:
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CombinedNameValuePairs(const NameValuePairs &pairs1, const NameValuePairs &pairs2)
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: m_pairs1(pairs1), m_pairs2(pairs2) {}
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bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
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private:
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const NameValuePairs &m_pairs1, &m_pairs2;
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};
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template <class T, class BASE>
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class GetValueHelperClass
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{
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public:
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GetValueHelperClass(const T *pObject, const char *name, const std::type_info &valueType, void *pValue, const NameValuePairs *searchFirst)
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: m_pObject(pObject), m_name(name), m_valueType(&valueType), m_pValue(pValue), m_found(false), m_getValueNames(false)
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{
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if (strcmp(m_name, "ValueNames") == 0)
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{
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m_found = m_getValueNames = true;
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NameValuePairs::ThrowIfTypeMismatch(m_name, typeid(std::string), *m_valueType);
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if (searchFirst)
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searchFirst->GetVoidValue(m_name, valueType, pValue);
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if (typeid(T) != typeid(BASE))
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pObject->BASE::GetVoidValue(m_name, valueType, pValue);
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((*reinterpret_cast<std::string *>(m_pValue) += "ThisPointer:") += typeid(T).name()) += ';';
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}
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if (!m_found && strncmp(m_name, "ThisPointer:", 12) == 0 && strcmp(m_name+12, typeid(T).name()) == 0)
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{
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NameValuePairs::ThrowIfTypeMismatch(m_name, typeid(T *), *m_valueType);
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*reinterpret_cast<const T **>(pValue) = pObject;
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m_found = true;
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return;
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}
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if (!m_found && searchFirst)
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m_found = searchFirst->GetVoidValue(m_name, valueType, pValue);
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if (!m_found && typeid(T) != typeid(BASE))
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m_found = pObject->BASE::GetVoidValue(m_name, valueType, pValue);
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}
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operator bool() const {return m_found;}
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template <class R>
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GetValueHelperClass<T,BASE> & operator()(const char *name, const R & (T::*pm)() const)
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{
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if (m_getValueNames)
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(*reinterpret_cast<std::string *>(m_pValue) += name) += ";";
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if (!m_found && strcmp(name, m_name) == 0)
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{
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NameValuePairs::ThrowIfTypeMismatch(name, typeid(R), *m_valueType);
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*reinterpret_cast<R *>(m_pValue) = (m_pObject->*pm)();
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m_found = true;
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}
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return *this;
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}
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GetValueHelperClass<T,BASE> &Assignable()
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{
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#ifndef __INTEL_COMPILER // ICL 9.1 workaround: Intel compiler copies the vTable pointer for some reason
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if (m_getValueNames)
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((*reinterpret_cast<std::string *>(m_pValue) += "ThisObject:") += typeid(T).name()) += ';';
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if (!m_found && strncmp(m_name, "ThisObject:", 11) == 0 && strcmp(m_name+11, typeid(T).name()) == 0)
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{
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NameValuePairs::ThrowIfTypeMismatch(m_name, typeid(T), *m_valueType);
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*reinterpret_cast<T *>(m_pValue) = *m_pObject;
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m_found = true;
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}
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#endif
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return *this;
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}
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private:
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const T *m_pObject;
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const char *m_name;
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const std::type_info *m_valueType;
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void *m_pValue;
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bool m_found, m_getValueNames;
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};
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template <class BASE, class T>
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GetValueHelperClass<T, BASE> GetValueHelper(const T *pObject, const char *name, const std::type_info &valueType, void *pValue, const NameValuePairs *searchFirst=NULL, BASE *dummy=NULL)
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{
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return GetValueHelperClass<T, BASE>(pObject, name, valueType, pValue, searchFirst);
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}
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template <class T>
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GetValueHelperClass<T, T> GetValueHelper(const T *pObject, const char *name, const std::type_info &valueType, void *pValue, const NameValuePairs *searchFirst=NULL)
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{
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return GetValueHelperClass<T, T>(pObject, name, valueType, pValue, searchFirst);
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}
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// ********************************************************
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template <class R>
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R Hack_DefaultValueFromConstReferenceType(const R &)
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{
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return R();
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}
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template <class R>
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bool Hack_GetValueIntoConstReference(const NameValuePairs &source, const char *name, const R &value)
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{
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return source.GetValue(name, const_cast<R &>(value));
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}
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template <class T, class BASE>
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class AssignFromHelperClass
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{
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public:
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AssignFromHelperClass(T *pObject, const NameValuePairs &source)
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: m_pObject(pObject), m_source(source), m_done(false)
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{
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if (source.GetThisObject(*pObject))
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m_done = true;
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else if (typeid(BASE) != typeid(T))
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pObject->BASE::AssignFrom(source);
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}
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template <class R>
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AssignFromHelperClass & operator()(const char *name, void (T::*pm)(R)) // VC60 workaround: "const R &" here causes compiler error
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{
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if (!m_done)
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{
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R value = Hack_DefaultValueFromConstReferenceType(reinterpret_cast<R>(*(int *)NULL));
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if (!Hack_GetValueIntoConstReference(m_source, name, value))
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throw InvalidArgument(std::string(typeid(T).name()) + ": Missing required parameter '" + name + "'");
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(m_pObject->*pm)(value);
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}
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return *this;
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}
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template <class R, class S>
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AssignFromHelperClass & operator()(const char *name1, const char *name2, void (T::*pm)(R, S)) // VC60 workaround: "const R &" here causes compiler error
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{
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if (!m_done)
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{
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R value1 = Hack_DefaultValueFromConstReferenceType(reinterpret_cast<R>(*(int *)NULL));
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if (!Hack_GetValueIntoConstReference(m_source, name1, value1))
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throw InvalidArgument(std::string(typeid(T).name()) + ": Missing required parameter '" + name1 + "'");
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S value2 = Hack_DefaultValueFromConstReferenceType(reinterpret_cast<S>(*(int *)NULL));
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if (!Hack_GetValueIntoConstReference(m_source, name2, value2))
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throw InvalidArgument(std::string(typeid(T).name()) + ": Missing required parameter '" + name2 + "'");
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(m_pObject->*pm)(value1, value2);
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}
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return *this;
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}
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private:
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T *m_pObject;
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const NameValuePairs &m_source;
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bool m_done;
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};
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template <class BASE, class T>
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AssignFromHelperClass<T, BASE> AssignFromHelper(T *pObject, const NameValuePairs &source, BASE *dummy=NULL)
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{
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return AssignFromHelperClass<T, BASE>(pObject, source);
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}
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template <class T>
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AssignFromHelperClass<T, T> AssignFromHelper(T *pObject, const NameValuePairs &source)
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{
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return AssignFromHelperClass<T, T>(pObject, source);
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}
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// ********************************************************
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// to allow the linker to discard Integer code if not needed.
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typedef bool (CRYPTOPP_API * PAssignIntToInteger)(const std::type_info &valueType, void *pInteger, const void *pInt);
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CRYPTOPP_DLL extern PAssignIntToInteger g_pAssignIntToInteger;
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CRYPTOPP_DLL const std::type_info & CRYPTOPP_API IntegerTypeId();
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class CRYPTOPP_DLL AlgorithmParametersBase
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{
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public:
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class ParameterNotUsed : public Exception
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{
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public:
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ParameterNotUsed(const char *name) : Exception(OTHER_ERROR, std::string("AlgorithmParametersBase: parameter \"") + name + "\" not used") {}
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};
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// this is actually a move, not a copy
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AlgorithmParametersBase(const AlgorithmParametersBase &x)
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: m_name(x.m_name), m_throwIfNotUsed(x.m_throwIfNotUsed), m_used(x.m_used)
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{
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m_next.reset(const_cast<AlgorithmParametersBase &>(x).m_next.release());
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x.m_used = true;
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}
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AlgorithmParametersBase(const char *name, bool throwIfNotUsed)
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: m_name(name), m_throwIfNotUsed(throwIfNotUsed), m_used(false) {}
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virtual ~AlgorithmParametersBase()
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{
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#ifdef CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE
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if (!std::uncaught_exception())
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#else
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try
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#endif
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{
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if (m_throwIfNotUsed && !m_used)
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throw ParameterNotUsed(m_name);
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}
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#ifndef CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE
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catch(...)
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{
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}
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#endif
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}
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bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
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protected:
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friend class AlgorithmParameters;
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void operator=(const AlgorithmParametersBase& rhs); // assignment not allowed, declare this for VC60
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virtual void AssignValue(const char *name, const std::type_info &valueType, void *pValue) const =0;
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virtual void MoveInto(void *p) const =0; // not really const
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const char *m_name;
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bool m_throwIfNotUsed;
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mutable bool m_used;
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member_ptr<AlgorithmParametersBase> m_next;
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};
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template <class T>
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class AlgorithmParametersTemplate : public AlgorithmParametersBase
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{
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public:
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AlgorithmParametersTemplate(const char *name, const T &value, bool throwIfNotUsed)
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: AlgorithmParametersBase(name, throwIfNotUsed), m_value(value)
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{
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}
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void AssignValue(const char *name, const std::type_info &valueType, void *pValue) const
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{
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// special case for retrieving an Integer parameter when an int was passed in
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if (!(g_pAssignIntToInteger != NULL && typeid(T) == typeid(int) && g_pAssignIntToInteger(valueType, pValue, &m_value)))
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{
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NameValuePairs::ThrowIfTypeMismatch(name, typeid(T), valueType);
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*reinterpret_cast<T *>(pValue) = m_value;
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}
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}
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void MoveInto(void *buffer) const
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{
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AlgorithmParametersTemplate<T>* p = new(buffer) AlgorithmParametersTemplate<T>(*this);
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}
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protected:
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T m_value;
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};
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CRYPTOPP_DLL_TEMPLATE_CLASS AlgorithmParametersTemplate<bool>;
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CRYPTOPP_DLL_TEMPLATE_CLASS AlgorithmParametersTemplate<int>;
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CRYPTOPP_DLL_TEMPLATE_CLASS AlgorithmParametersTemplate<ConstByteArrayParameter>;
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class CRYPTOPP_DLL AlgorithmParameters : public NameValuePairs
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{
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public:
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AlgorithmParameters();
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#ifdef __BORLANDC__
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template <class T>
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AlgorithmParameters(const char *name, const T &value, bool throwIfNotUsed=true)
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: m_next(new AlgorithmParametersTemplate<T>(name, value, throwIfNotUsed))
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, m_defaultThrowIfNotUsed(throwIfNotUsed)
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{
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}
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#endif
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AlgorithmParameters(const AlgorithmParameters &x);
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AlgorithmParameters & operator=(const AlgorithmParameters &x);
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template <class T>
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AlgorithmParameters & operator()(const char *name, const T &value, bool throwIfNotUsed)
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{
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member_ptr<AlgorithmParametersBase> p(new AlgorithmParametersTemplate<T>(name, value, throwIfNotUsed));
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p->m_next.reset(m_next.release());
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m_next.reset(p.release());
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m_defaultThrowIfNotUsed = throwIfNotUsed;
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return *this;
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}
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template <class T>
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AlgorithmParameters & operator()(const char *name, const T &value)
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{
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return operator()(name, value, m_defaultThrowIfNotUsed);
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}
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bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
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protected:
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member_ptr<AlgorithmParametersBase> m_next;
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bool m_defaultThrowIfNotUsed;
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};
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//! Create an object that implements NameValuePairs for passing parameters
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/*! \param throwIfNotUsed if true, the object will throw an exception if the value is not accessed
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\note throwIfNotUsed is ignored if using a compiler that does not support std::uncaught_exception(),
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such as MSVC 7.0 and earlier.
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\note A NameValuePairs object containing an arbitrary number of name value pairs may be constructed by
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repeatedly using operator() on the object returned by MakeParameters, for example:
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AlgorithmParameters parameters = MakeParameters(name1, value1)(name2, value2)(name3, value3);
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*/
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#ifdef __BORLANDC__
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typedef AlgorithmParameters MakeParameters;
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#else
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template <class T>
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AlgorithmParameters MakeParameters(const char *name, const T &value, bool throwIfNotUsed = true)
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{
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return AlgorithmParameters()(name, value, throwIfNotUsed);
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}
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#endif
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#define CRYPTOPP_GET_FUNCTION_ENTRY(name) (Name::name(), &ThisClass::Get##name)
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#define CRYPTOPP_SET_FUNCTION_ENTRY(name) (Name::name(), &ThisClass::Set##name)
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#define CRYPTOPP_SET_FUNCTION_ENTRY2(name1, name2) (Name::name1(), Name::name2(), &ThisClass::Set##name1##And##name2)
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NAMESPACE_END
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#endif
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