Differential D3805 Diff 10681 src/script/sigencoding.cpp

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src/script/sigencoding.cpp

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	* This function is consensus-critical since BIP66.			* This function is consensus-critical since BIP66.
	*/			*/
	static bool IsValidDERSignatureEncoding(const slicedvaltype &sig) {			static bool IsValidDERSignatureEncoding(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]
	// * total-length: 1-byte length descriptor of everything that follows,			// * total-length: 1-byte length descriptor of everything that follows,
	// excluding the sighash byte.			// excluding the sighash byte.
	// * R-length: 1-byte length descriptor of the R value that follows.			// * R-length: 1-byte length descriptor of the R value that follows.
	// * R: arbitrary-length big-endian encoded R value. It must use the			// * R: arbitrary-length big-endian encoded R value. It must use the
	// shortest possible encoding for a positive integers (which means no null			// shortest possible encoding for a positive integer (which means no null
	// bytes at the start, except a single one when the next byte has its			// bytes at the start, except a single one when the next byte has its
	// highest bit set).			// highest bit set).
	// * S-length: 1-byte length descriptor of the S value that follows.			// * S-length: 1-byte length descriptor of the S value that follows.
	// * S: arbitrary-length big-endian encoded S value. The same rules apply.			// * S: arbitrary-length big-endian encoded S value. The same rules apply.

	// Minimum and maximum size constraints.			// Minimum and maximum size constraints.
	if (sig.size() < 8 \|\| sig.size() > 72) {			if (sig.size() < 8 \|\| sig.size() > 72) {
	return false;			return false;
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