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Assert CPubKey::ValidLength to the pubkey's header-relevent size

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Previously this was an inline test where the specificity was probably judged
overly specific. As a class method it makes sense to maintain consistency.

And replace some magic values with their constant equivalents.
This commit is contained in:
Ben Woosley 2018-02-16 20:28:03 +00:00
parent 4a62ddd018
commit f8c249ab91
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GPG key ID: 6EE5F3785F78B345
4 changed files with 12 additions and 7 deletions
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2
src/keystore.cpp
View file

@ -131,7 +131,7 @@ static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)
CScript::const_iterator pc = dest.begin();
opcodetype opcode;
std::vector<unsigned char> vch;
if (!dest.GetOp(pc, opcode, vch) || vch.size() < 33 || vch.size() > 65)
if (!dest.GetOp(pc, opcode, vch) || !CPubKey::ValidSize(vch))
return false;
pubKeyOut = CPubKey(vch);
if (!pubKeyOut.IsFullyValid())

5
src/pubkey.h
View file

@ -70,6 +70,11 @@ private:
}
public:
bool static ValidSize(const std::vector<unsigned char> &vch) {
return vch.size() > 0 && GetLen(vch[0]) == vch.size();
}
//! Construct an invalid public key.
CPubKey()
{

8
src/script/interpreter.cpp
View file

@ -61,17 +61,17 @@ static inline void popstack(std::vector<valtype>& stack)
}
bool static IsCompressedOrUncompressedPubKey(const valtype &vchPubKey) {
if (vchPubKey.size() < 33) {
if (vchPubKey.size() < CPubKey::COMPRESSED_PUBLIC_KEY_SIZE) {
// Non-canonical public key: too short
return false;
}
if (vchPubKey[0] == 0x04) {
if (vchPubKey.size() != 65) {
if (vchPubKey.size() != CPubKey::PUBLIC_KEY_SIZE) {
// Non-canonical public key: invalid length for uncompressed key
return false;
}
} else if (vchPubKey[0] == 0x02 || vchPubKey[0] == 0x03) {
if (vchPubKey.size() != 33) {
if (vchPubKey.size() != CPubKey::COMPRESSED_PUBLIC_KEY_SIZE) {
// Non-canonical public key: invalid length for compressed key
return false;
}
@ -83,7 +83,7 @@ bool static IsCompressedOrUncompressedPubKey(const valtype &vchPubKey) {
}
bool static IsCompressedPubKey(const valtype &vchPubKey) {
if (vchPubKey.size() != 33) {
if (vchPubKey.size() != CPubKey::COMPRESSED_PUBLIC_KEY_SIZE) {
// Non-canonical public key: invalid length for compressed key
return false;
}

4
src/script/standard.cpp
View file

@ -132,7 +132,7 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::v
// Template matching opcodes:
if (opcode2 == OP_PUBKEYS)
{
while (vch1.size() >= 33 && vch1.size() <= 65)
while (CPubKey::ValidSize(vch1))
{
vSolutionsRet.push_back(vch1);
if (!script1.GetOp(pc1, opcode1, vch1))
@ -146,7 +146,7 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::v
if (opcode2 == OP_PUBKEY)
{
if (vch1.size() < 33 || vch1.size() > 65)
if (!CPubKey::ValidSize(vch1))
break;
vSolutionsRet.push_back(vch1);
}