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src/script/interpreter.cpp
| Show First 20 Lines • Show All 48 Lines • ▼ Show 20 Lines | static void CleanupScriptCode(CScript &scriptCode, | ||||
| uint32_t flags) { | uint32_t flags) { | ||||
| // Drop the signature in scripts when SIGHASH_FORKID is not used. | // Drop the signature in scripts when SIGHASH_FORKID is not used. | ||||
| SigHashType sigHashType = GetHashType(vchSig); | SigHashType sigHashType = GetHashType(vchSig); | ||||
| if (!(flags & SCRIPT_ENABLE_SIGHASH_FORKID) || !sigHashType.hasForkId()) { | if (!(flags & SCRIPT_ENABLE_SIGHASH_FORKID) || !sigHashType.hasForkId()) { | ||||
| scriptCode.FindAndDelete(CScript(vchSig)); | scriptCode.FindAndDelete(CScript(vchSig)); | ||||
| } | } | ||||
| } | } | ||||
| static bool CheckMinimalPush(const valtype &data, opcodetype opcode) { | |||||
| // Excludes OP_1NEGATE, OP_1-16 since they are by definition minimal | |||||
| assert(0 <= opcode && opcode <= OP_PUSHDATA4); | |||||
| if (data.size() == 0) { | |||||
| // Should have used OP_0. | |||||
| return opcode == OP_0; | |||||
| } | |||||
| if (data.size() == 1 && data[0] >= 1 && data[0] <= 16) { | |||||
| // Should have used OP_1 .. OP_16. | |||||
| return false; | |||||
| } | |||||
| if (data.size() == 1 && data[0] == 0x81) { | |||||
| // Should have used OP_1NEGATE. | |||||
| return false; | |||||
| } | |||||
| if (data.size() <= 75) { | |||||
| // Must have used a direct push (opcode indicating number of bytes | |||||
| // pushed + those bytes). | |||||
| return opcode == data.size(); | |||||
| } | |||||
| if (data.size() <= 255) { | |||||
| // Must have used OP_PUSHDATA. | |||||
| return opcode == OP_PUSHDATA1; | |||||
| } | |||||
| if (data.size() <= 65535) { | |||||
| // Must have used OP_PUSHDATA2. | |||||
| return opcode == OP_PUSHDATA2; | |||||
| } | |||||
| return true; | |||||
| } | |||||
| static bool IsOpcodeDisabled(opcodetype opcode, uint32_t flags) { | static bool IsOpcodeDisabled(opcodetype opcode, uint32_t flags) { | ||||
| switch (opcode) { | switch (opcode) { | ||||
| case OP_INVERT: | case OP_INVERT: | ||||
| case OP_2MUL: | case OP_2MUL: | ||||
| case OP_2DIV: | case OP_2DIV: | ||||
| case OP_MUL: | case OP_MUL: | ||||
| case OP_LSHIFT: | case OP_LSHIFT: | ||||
| case OP_RSHIFT: | case OP_RSHIFT: | ||||
| ▲ Show 20 Lines • Show All 1,679 Lines • Show Last 20 Lines | |||||