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src/script/sigencoding.cpp
| Show First 20 Lines • Show All 163 Lines • ▼ Show 20 Lines | static bool CheckRawECDSASignatureEncoding(const slicedvaltype &sig, | ||||
| if ((flags & SCRIPT_VERIFY_LOW_S) && !CPubKey::CheckLowS(sig)) { | if ((flags & SCRIPT_VERIFY_LOW_S) && !CPubKey::CheckLowS(sig)) { | ||||
| return set_error(serror, SCRIPT_ERR_SIG_HIGH_S); | return set_error(serror, SCRIPT_ERR_SIG_HIGH_S); | ||||
| } | } | ||||
| return true; | return true; | ||||
| } | } | ||||
| bool CheckDataSignatureEncoding(const valtype &vchSig, uint32_t flags, | static bool CheckRawSignatureEncoding(const slicedvaltype &sig, uint32_t flags, | ||||
| ScriptError *serror) { | ScriptError *serror) { | ||||
| // Empty signature. Not strictly DER encoded, but allowed to provide a | return CheckRawECDSASignatureEncoding(sig, flags, serror); | ||||
| // compact way to provide an invalid signature for use with CHECK(MULTI)SIG | |||||
| if (vchSig.size() == 0) { | |||||
| return true; | |||||
| } | |||||
| return CheckRawECDSASignatureEncoding( | |||||
| vchSig | boost::adaptors::sliced(0, vchSig.size()), flags, serror); | |||||
| } | } | ||||
| bool CheckTransactionECDSASignatureEncoding(const valtype &vchSig, | bool CheckDataSignatureEncoding(const valtype &vchSig, uint32_t flags, | ||||
| uint32_t flags, | |||||
| ScriptError *serror) { | ScriptError *serror) { | ||||
| // Empty signature. Not strictly DER encoded, but allowed to provide a | // Empty signature. Not strictly DER encoded, but allowed to provide a | ||||
| // compact way to provide an invalid signature for use with CHECK(MULTI)SIG | // compact way to provide an invalid signature for use with CHECK(MULTI)SIG | ||||
| if (vchSig.size() == 0) { | if (vchSig.size() == 0) { | ||||
| return true; | return true; | ||||
| } | } | ||||
| if (!CheckRawECDSASignatureEncoding( | return CheckRawSignatureEncoding( | ||||
| vchSig | boost::adaptors::sliced(0, vchSig.size() - 1), flags, | vchSig | boost::adaptors::sliced(0, vchSig.size()), flags, serror); | ||||
| serror)) { | |||||
| // serror is set | |||||
| return false; | |||||
| } | } | ||||
| static bool CheckSighashEncoding(const valtype &vchSig, uint32_t flags, | |||||
| ScriptError *serror) { | |||||
| if (flags & SCRIPT_VERIFY_STRICTENC) { | if (flags & SCRIPT_VERIFY_STRICTENC) { | ||||
| if (!GetHashType(vchSig).isDefined()) { | if (!GetHashType(vchSig).isDefined()) { | ||||
| return set_error(serror, SCRIPT_ERR_SIG_HASHTYPE); | return set_error(serror, SCRIPT_ERR_SIG_HASHTYPE); | ||||
| } | } | ||||
| bool usesForkId = GetHashType(vchSig).hasForkId(); | bool usesForkId = GetHashType(vchSig).hasForkId(); | ||||
| bool forkIdEnabled = flags & SCRIPT_ENABLE_SIGHASH_FORKID; | bool forkIdEnabled = flags & SCRIPT_ENABLE_SIGHASH_FORKID; | ||||
| if (!forkIdEnabled && usesForkId) { | if (!forkIdEnabled && usesForkId) { | ||||
| return set_error(serror, SCRIPT_ERR_ILLEGAL_FORKID); | return set_error(serror, SCRIPT_ERR_ILLEGAL_FORKID); | ||||
| } | } | ||||
| if (forkIdEnabled && !usesForkId) { | if (forkIdEnabled && !usesForkId) { | ||||
| return set_error(serror, SCRIPT_ERR_MUST_USE_FORKID); | return set_error(serror, SCRIPT_ERR_MUST_USE_FORKID); | ||||
| } | } | ||||
| } | } | ||||
| return true; | return true; | ||||
| } | } | ||||
| bool CheckTransactionECDSASignatureEncoding(const valtype &vchSig, | |||||
| uint32_t flags, | |||||
| ScriptError *serror) { | |||||
| // Empty signature. Not strictly DER encoded, but allowed to provide a | |||||
| // compact way to provide an invalid signature for use with CHECK(MULTI)SIG | |||||
| if (vchSig.size() == 0) { | |||||
| return true; | |||||
| } | |||||
| if (!CheckRawECDSASignatureEncoding( | |||||
| vchSig | boost::adaptors::sliced(0, vchSig.size() - 1), flags, | |||||
| serror)) { | |||||
| // serror is set | |||||
| return false; | |||||
| } | |||||
| return CheckSighashEncoding(vchSig, flags, serror); | |||||
| } | |||||
| bool CheckTransactionSignatureEncoding(const valtype &vchSig, uint32_t flags, | bool CheckTransactionSignatureEncoding(const valtype &vchSig, uint32_t flags, | ||||
| ScriptError *serror) { | ScriptError *serror) { | ||||
| return CheckTransactionECDSASignatureEncoding(vchSig, flags, serror); | // Empty signature. Not strictly DER encoded, but allowed to provide a | ||||
| // compact way to provide an invalid signature for use with CHECK(MULTI)SIG | |||||
| if (vchSig.size() == 0) { | |||||
| return true; | |||||
| } | |||||
| if (!CheckRawSignatureEncoding( | |||||
| vchSig | boost::adaptors::sliced(0, vchSig.size() - 1), flags, | |||||
| serror)) { | |||||
| // serror is set | |||||
| return false; | |||||
| } | |||||
| return CheckSighashEncoding(vchSig, flags, serror); | |||||
| } | } | ||||
| static bool IsCompressedOrUncompressedPubKey(const valtype &vchPubKey) { | static bool IsCompressedOrUncompressedPubKey(const valtype &vchPubKey) { | ||||
| switch (vchPubKey.size()) { | switch (vchPubKey.size()) { | ||||
| case 33: | case 33: | ||||
| // Compressed public key: must start with 0x02 or 0x03. | // Compressed public key: must start with 0x02 or 0x03. | ||||
| return vchPubKey[0] == 0x02 || vchPubKey[0] == 0x03; | return vchPubKey[0] == 0x02 || vchPubKey[0] == 0x03; | ||||
| Show All 36 Lines | |||||