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Differential D1202 Diff 3251 src/script/interpreter.cpp

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src/script/interpreter.cpp

Show First 20 Lines • Show All 306 Lines • ▼ Show 20 Linesbool EvalScript(std::vector<valtype> &stack, const CScript &script,
std::vector<bool> vfExec; std::vector<bool> vfExec;
std::vector<valtype> altstack; std::vector<valtype> altstack;
set_error(serror, SCRIPT_ERR_UNKNOWN_ERROR); set_error(serror, SCRIPT_ERR_UNKNOWN_ERROR);
if (script.size() > MAX_SCRIPT_SIZE) { if (script.size() > MAX_SCRIPT_SIZE) {
return set_error(serror, SCRIPT_ERR_SCRIPT_SIZE); return set_error(serror, SCRIPT_ERR_SCRIPT_SIZE);
} }
int nOpCount = 0; int nOpCount = 0;
bool fRequireMinimal = (flags & SCRIPT_VERIFY_MINIMALDATA) != 0; bool fRequireMinimal = (flags & SCRIPT_VERIFY_MINIMALDATA) != 0;
bool fEnabledOpCodesMonolith = (flags & SCRIPT_ENABLE_OPCODES_MONOLITH) != 0;
try { try {
while (pc < pend) { while (pc < pend) {
bool fExec = !count(vfExec.begin(), vfExec.end(), false); bool fExec = !count(vfExec.begin(), vfExec.end(), false);
// //
// Read instruction // Read instruction
// //
if (!script.GetOp(pc, opcode, vchPushValue)) { if (!script.GetOp(pc, opcode, vchPushValue)) {
return set_error(serror, SCRIPT_ERR_BAD_OPCODE); return set_error(serror, SCRIPT_ERR_BAD_OPCODE);
} }
if (vchPushValue.size() > MAX_SCRIPT_ELEMENT_SIZE) { if (vchPushValue.size() > MAX_SCRIPT_ELEMENT_SIZE) {
return set_error(serror, SCRIPT_ERR_PUSH_SIZE); return set_error(serror, SCRIPT_ERR_PUSH_SIZE);
} }
// Note how OP_RESERVED does not count towards the opcode limit. // Note how OP_RESERVED does not count towards the opcode limit.
if (opcode > OP_16 && ++nOpCount > MAX_OPS_PER_SCRIPT) { if (opcode > OP_16 && ++nOpCount > MAX_OPS_PER_SCRIPT) {
return set_error(serror, SCRIPT_ERR_OP_COUNT); return set_error(serror, SCRIPT_ERR_OP_COUNT);
} }
if (opcode == OP_CAT || opcode == OP_SPLIT || if (opcode == OP_INVERT || opcode == OP_2MUL || opcode == OP_2DIV ||
opcode == OP_NUM2BIN || opcode == OP_BIN2NUM || opcode == OP_MUL || opcode == OP_LSHIFT || opcode == OP_RSHIFT) {
opcode == OP_INVERT || opcode == OP_AND || opcode == OP_OR ||
opcode == OP_XOR || opcode == OP_2MUL || opcode == OP_2DIV ||
opcode == OP_MUL || opcode == OP_DIV || opcode == OP_MOD ||
opcode == OP_LSHIFT || opcode == OP_RSHIFT) {
// Disabled opcodes. // Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE); return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
} }
if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4) { if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4) {
if (fRequireMinimal && if (fRequireMinimal &&
!CheckMinimalPush(vchPushValue, opcode)) { !CheckMinimalPush(vchPushValue, opcode)) {
return set_error(serror, SCRIPT_ERR_MINIMALDATA); return set_error(serror, SCRIPT_ERR_MINIMALDATA);
▲ Show 20 Lines • Show All 424 Lines • ▼ Show 20 Lines try {
} }
CScriptNum bn(stacktop(-1).size()); CScriptNum bn(stacktop(-1).size());
stack.push_back(bn.getvch()); stack.push_back(bn.getvch());
} break; } break;
// //
// Bitwise logic // Bitwise logic
// //
case OP_AND:
case OP_OR:
case OP_XOR: {
if (!fEnabledOpCodesMonolith) {
// Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
} break;
case OP_EQUAL: case OP_EQUAL:
case OP_EQUALVERIFY: case OP_EQUALVERIFY:
// case OP_NOTEQUAL: // use OP_NUMNOTEQUAL // case OP_NOTEQUAL: // use OP_NUMNOTEQUAL
{ {
// (x1 x2 - bool) // (x1 x2 - bool)
if (stack.size() < 2) { if (stack.size() < 2) {
return set_error( return set_error(
serror, SCRIPT_ERR_INVALID_STACK_OPERATION); serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Lines try {
break; break;
} }
popstack(stack); popstack(stack);
stack.push_back(bn.getvch()); stack.push_back(bn.getvch());
} break; } break;
case OP_ADD: case OP_ADD:
case OP_SUB: case OP_SUB:
case OP_DIV:
case OP_MOD:
case OP_BOOLAND: case OP_BOOLAND:
case OP_BOOLOR: case OP_BOOLOR:
case OP_NUMEQUAL: case OP_NUMEQUAL:
case OP_NUMEQUALVERIFY: case OP_NUMEQUALVERIFY:
case OP_NUMNOTEQUAL: case OP_NUMNOTEQUAL:
case OP_LESSTHAN: case OP_LESSTHAN:
case OP_GREATERTHAN: case OP_GREATERTHAN:
case OP_LESSTHANOREQUAL: case OP_LESSTHANOREQUAL:
Show All 12 Lines try {
case OP_ADD: case OP_ADD:
bn = bn1 + bn2; bn = bn1 + bn2;
break; break;
case OP_SUB: case OP_SUB:
bn = bn1 - bn2; bn = bn1 - bn2;
break; break;
case OP_DIV:
if (!fEnabledOpCodesMonolith) {
// Disabled opcode.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
break;
case OP_MOD:
if (!fEnabledOpCodesMonolith) {
// Disabled opcode.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
break;
case OP_BOOLAND: case OP_BOOLAND:
bn = (bn1 != bnZero && bn2 != bnZero); bn = (bn1 != bnZero && bn2 != bnZero);
break; break;
case OP_BOOLOR: case OP_BOOLOR:
bn = (bn1 != bnZero || bn2 != bnZero); bn = (bn1 != bnZero || bn2 != bnZero);
break; break;
case OP_NUMEQUAL: case OP_NUMEQUAL:
bn = (bn1 == bn2); bn = (bn1 == bn2);
▲ Show 20 Lines • Show All 277 Lines • ▼ Show 20 Lines try {
popstack(stack); popstack(stack);
} else { } else {
return set_error( return set_error(
serror, SCRIPT_ERR_CHECKMULTISIGVERIFY); serror, SCRIPT_ERR_CHECKMULTISIGVERIFY);
} }
} }
} break; } break;
//
// Byte string operations
//
case OP_CAT: {
if (!fEnabledOpCodesMonolith) {
// Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
} break;
case OP_SPLIT: {
if (!fEnabledOpCodesMonolith) {
// Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
} break;
//
// Conversion operations
//
case OP_BIN2NUM: {
if (!fEnabledOpCodesMonolith) {
// Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
} break;
case OP_NUM2BIN: {
if (!fEnabledOpCodesMonolith) {
// Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}
} break;
default: default:
return set_error(serror, SCRIPT_ERR_BAD_OPCODE); return set_error(serror, SCRIPT_ERR_BAD_OPCODE);
} }
// Size limits // Size limits
if (stack.size() + altstack.size() > 1000) { if (stack.size() + altstack.size() > 1000) {
return set_error(serror, SCRIPT_ERR_STACK_SIZE); return set_error(serror, SCRIPT_ERR_STACK_SIZE);
} }
▲ Show 20 Lines • Show All 444 Lines • Show Last 20 Lines