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Diffstat (limited to 'old/botan/build/botan/basefilt.h')
-rw-r--r-- | old/botan/build/botan/basefilt.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/old/botan/build/botan/basefilt.h b/old/botan/build/botan/basefilt.h new file mode 100644 index 0000000..75625ab --- /dev/null +++ b/old/botan/build/botan/basefilt.h @@ -0,0 +1,99 @@ +/* +* Basic Filters +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_BASEFILT_H__ +#define BOTAN_BASEFILT_H__ + +#include <botan/filter.h> +#include <botan/sym_algo.h> + +namespace Botan { + +/** +* This class represents Filter chains. A Filter chain is an ordered +* concatenation of Filters, the input to a Chain sequentially passes +* through all the Filters contained in the Chain. +*/ + +class BOTAN_DLL Chain : public Fanout_Filter + { + public: + void write(const byte input[], u32bit length) { send(input, length); } + + /** + * Construct a chain of up to four filters. The filters are set + * up in the same order as the arguments. + */ + Chain(Filter* = 0, Filter* = 0, Filter* = 0, Filter* = 0); + + /** + * Construct a chain from range of filters + * @param filter_arr the list of filters + * @param length how many filters + */ + Chain(Filter* filter_arr[], u32bit length); + }; + +/** +* This class represents a fork filter, whose purpose is to fork the +* flow of data. It causes an input message to result in n messages at +* the end of the filter, where n is the number of forks. +*/ +class BOTAN_DLL Fork : public Fanout_Filter + { + public: + void write(const byte input[], u32bit length) { send(input, length); } + void set_port(u32bit n) { Fanout_Filter::set_port(n); } + + /** + * Construct a Fork filter with up to four forks. + */ + Fork(Filter*, Filter*, Filter* = 0, Filter* = 0); + + /** + * Construct a Fork from range of filters + * @param filter_arr the list of filters + * @param length how many filters + */ + Fork(Filter* filter_arr[], u32bit length); + }; + +/** +* This class represents keyed filters, i.e. filters that have to be +* fed with a key in order to function. +*/ +class BOTAN_DLL Keyed_Filter : public Filter + { + public: + + /** + * Set the key of this filter. + * @param key the key to set + */ + virtual void set_key(const SymmetricKey& key); + + /** + * Set the initialization vector of this filter. + * @param iv the initialization vector to set + */ + virtual void set_iv(const InitializationVector&) {} + + /** + * Check whether a key length is valid for this filter. + * @param length the key length to be checked for validity + * @return true if the key length is valid, false otherwise + */ + virtual bool valid_keylength(u32bit length) const; + + Keyed_Filter() { base_ptr = 0; } + protected: + SymmetricAlgorithm* base_ptr; + }; + +} + +#endif |