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Show First 20 Lines • Show All 50 Lines • ▼ Show 20 Lines	static bool IsValidSignatureEncoding(const valtype &sig) {
// Make sure the length of the S element is still inside the signature.		// Make sure the length of the S element is still inside the signature.
if (5 + lenR >= sig.size()) return false;		if (5 + lenR >= sig.size()) return false;

// Extract the length of the S element.		// Extract the length of the S element.
unsigned int lenS = sig[5 + lenR];		unsigned int lenS = sig[5 + lenR];

// Verify that the length of the signature matches the sum of the length		// Verify that the length of the signature matches the sum of the length
// of the elements.		// of the elements.
if ((size_t)(lenR + lenS + 7) != sig.size()) return false;		if (size_t(lenR + lenS + 7) != sig.size()) return false;

// Check whether the R element is an integer.		// Check whether the R element is an integer.
if (sig[2] != 0x02) return false;		if (sig[2] != 0x02) return false;

// Zero-length integers are not allowed for R.		// Zero-length integers are not allowed for R.
if (lenR == 0) return false;		if (lenR == 0) return false;

// Negative numbers are not allowed for R.		// Negative numbers are not allowed for R.
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