Page MenuHomePhabricator
Differential D1103 Diff 3001 src/script/interpreter.cpp

Changeset View

Standalone View

View Options

src/script/interpreter.cpp

Show First 20 Lines • Show All 329 Lines • ▼ Show 20 Lines try {
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_RIGHT || opcode == OP_INVERT || opcode == OP_2MUL || if (opcode == OP_INVERT || opcode == OP_2MUL || opcode == OP_2DIV ||
opcode == OP_2DIV || opcode == OP_MUL || opcode == OP_LSHIFT || opcode == OP_MUL || opcode == OP_LSHIFT || opcode == OP_RSHIFT) {
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 957 Lines • ▼ Show 20 Lines try {
CScriptNum num(bin, false); CScriptNum num(bin, false);
if (num > (INT_MAX>>1) || num < (INT_MIN>>1)) { if (num > (INT_MAX>>1) || num < (INT_MIN>>1)) {
return set_error(serror, SCRIPT_ERR_INVALID_BIN2NUM_OPERATION); return set_error(serror, SCRIPT_ERR_INVALID_BIN2NUM_OPERATION);
} }
stack.pop_back(); stack.pop_back();
stack.push_back(num.getvch()); stack.push_back(num.getvch());
} break; } break;
case OP_NUM2BIN: {
// (in size -- out)
if (stack.size() < 2) {
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
}
CScriptNum num(stacktop(-2), fRequireMinimal);
int64_t size = CScriptNum(stacktop(-1), fRequireMinimal).getint();
if (size < 1 || static_cast<uint64_t>(size) > CScriptNum::nDefaultMaxNumSize) {
return set_error(serror, SCRIPT_ERR_INVALID_NUM2BIN_OPERATION);
}
// Produces a byte vector of num and check if input size is valid
valtype vchNum = num.getvch();
if (size < vchNum.size()) {
return set_error(serror, SCRIPT_ERR_INVALID_NUM2BIN_OPERATION);
}
// Initialize byte vector for result
valtype result;
result.reserve(size);
bool neg{false};
// Avoid negative zero
if (!vchNum.empty()) {
neg = *vchNum.rbegin()&0x80;
*vchNum.rbegin() &= ~0x80;
}
// Pad result to declared input size
size_t pad = size - vchNum.size();
for (uint8_t i = 0; i < pad; ++i) {
result.push_back(0);
}
for (auto i = vchNum.rbegin(); i != vchNum.rend(); ++i) {
result.push_back(*i);
}
if (neg) *result.begin()|=0x80;
stack.pop_back();
stack.pop_back();
stack.push_back(result);
} 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 437 Lines • Show Last 20 Lines