Differential D2095 Diff 5921 src/script/sigencoding.cpp

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src/script/sigencoding.cpp

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	#include "script_flags.h"			#include "script_flags.h"

	#include <boost/range/adaptor/sliced.hpp>			#include <boost/range/adaptor/sliced.hpp>

	typedef boost::sliced_range<const valtype> slicedvaltype;			typedef boost::sliced_range<const valtype> slicedvaltype;

	/**			/**
	* A canonical signature exists of: <30> <total len> <02> <len R> <R> <02> <len			* A canonical signature exists of: <30> <total len> <02> <len R> <R> <02> <len
	* S> <S> <hashtype>, where R and S are not negative (their first byte has its			* S> <S>, where R and S are not negative (their first byte has its highest bit
	* highest bit not set), and not excessively padded (do not start with a 0 byte,			* not set), and not excessively padded (do not start with a 0 byte, unless an
	* unless an otherwise negative number follows, in which case a single 0 byte is			* otherwise negative number follows, in which case a single 0 byte is
	* necessary and even required).			* necessary and even required).
	*			*
	* See https://bitcointalk.org/index.php?topic=8392.msg127623#msg127623			* See https://bitcointalk.org/index.php?topic=8392.msg127623#msg127623
	*			*
	* This function is consensus-critical since BIP66.			* This function is consensus-critical since BIP66.
	*/			*/
	static bool IsValidSignatureEncoding(const slicedvaltype &sig) {			static bool IsValidSignatureEncoding(const slicedvaltype &sig) {
	// Format: 0x30 [total-length] 0x02 [R-length] [R] 0x02 [S-length] [S]			// Format: 0x30 [total-length] 0x02 [R-length] [R] 0x02 [S-length] [S]
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