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-rw-r--r--src/script.cpp167
1 files changed, 1 insertions, 166 deletions
diff --git a/src/script.cpp b/src/script.cpp
index 5e5cd096cd..90066efd33 100644
--- a/src/script.cpp
+++ b/src/script.cpp
@@ -54,32 +54,6 @@ bool CastToBool(const valtype& vch)
return false;
}
-//
-// WARNING: This does not work as expected for signed integers; the sign-bit
-// is left in place as the integer is zero-extended. The correct behavior
-// would be to move the most significant bit of the last byte during the
-// resize process. MakeSameSize() is currently only used by the disabled
-// opcodes OP_AND, OP_OR, and OP_XOR.
-//
-void MakeSameSize(valtype& vch1, valtype& vch2)
-{
- // Lengthen the shorter one
- if (vch1.size() < vch2.size())
- // PATCH:
- // +unsigned char msb = vch1[vch1.size()-1];
- // +vch1[vch1.size()-1] &= 0x7f;
- // vch1.resize(vch2.size(), 0);
- // +vch1[vch1.size()-1] = msb;
- vch1.resize(vch2.size(), 0);
- if (vch2.size() < vch1.size())
- // PATCH:
- // +unsigned char msb = vch2[vch2.size()-1];
- // +vch2[vch2.size()-1] &= 0x7f;
- // vch2.resize(vch1.size(), 0);
- // +vch2[vch2.size()-1] = msb;
- vch2.resize(vch1.size(), 0);
-}
-
//
@@ -361,7 +335,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
opcode == OP_MOD ||
opcode == OP_LSHIFT ||
opcode == OP_RSHIFT)
- return false;
+ return false; // Disabled opcodes.
if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4)
stack.push_back(vchPushValue);
@@ -659,64 +633,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
break;
- //
- // Splice ops
- //
- case OP_CAT:
- {
- // (x1 x2 -- out)
- if (stack.size() < 2)
- return false;
- valtype& vch1 = stacktop(-2);
- valtype& vch2 = stacktop(-1);
- vch1.insert(vch1.end(), vch2.begin(), vch2.end());
- popstack(stack);
- if (stacktop(-1).size() > MAX_SCRIPT_ELEMENT_SIZE)
- return false;
- }
- break;
-
- case OP_SUBSTR:
- {
- // (in begin size -- out)
- if (stack.size() < 3)
- return false;
- valtype& vch = stacktop(-3);
- int nBegin = CastToBigNum(stacktop(-2)).getint();
- int nEnd = nBegin + CastToBigNum(stacktop(-1)).getint();
- if (nBegin < 0 || nEnd < nBegin)
- return false;
- if (nBegin > (int)vch.size())
- nBegin = vch.size();
- if (nEnd > (int)vch.size())
- nEnd = vch.size();
- vch.erase(vch.begin() + nEnd, vch.end());
- vch.erase(vch.begin(), vch.begin() + nBegin);
- popstack(stack);
- popstack(stack);
- }
- break;
-
- case OP_LEFT:
- case OP_RIGHT:
- {
- // (in size -- out)
- if (stack.size() < 2)
- return false;
- valtype& vch = stacktop(-2);
- int nSize = CastToBigNum(stacktop(-1)).getint();
- if (nSize < 0)
- return false;
- if (nSize > (int)vch.size())
- nSize = vch.size();
- if (opcode == OP_LEFT)
- vch.erase(vch.begin() + nSize, vch.end());
- else
- vch.erase(vch.begin(), vch.end() - nSize);
- popstack(stack);
- }
- break;
-
case OP_SIZE:
{
// (in -- in size)
@@ -731,51 +647,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
//
// Bitwise logic
//
- case OP_INVERT:
- {
- // (in - out)
- if (stack.size() < 1)
- return false;
- valtype& vch = stacktop(-1);
- for (unsigned int i = 0; i < vch.size(); i++)
- vch[i] = ~vch[i];
- }
- break;
-
- //
- // WARNING: These disabled opcodes exhibit unexpected behavior
- // when used on signed integers due to a bug in MakeSameSize()
- // [see definition of MakeSameSize() above].
- //
- case OP_AND:
- case OP_OR:
- case OP_XOR:
- {
- // (x1 x2 - out)
- if (stack.size() < 2)
- return false;
- valtype& vch1 = stacktop(-2);
- valtype& vch2 = stacktop(-1);
- MakeSameSize(vch1, vch2); // <-- NOT SAFE FOR SIGNED VALUES
- if (opcode == OP_AND)
- {
- for (unsigned int i = 0; i < vch1.size(); i++)
- vch1[i] &= vch2[i];
- }
- else if (opcode == OP_OR)
- {
- for (unsigned int i = 0; i < vch1.size(); i++)
- vch1[i] |= vch2[i];
- }
- else if (opcode == OP_XOR)
- {
- for (unsigned int i = 0; i < vch1.size(); i++)
- vch1[i] ^= vch2[i];
- }
- popstack(stack);
- }
- break;
-
case OP_EQUAL:
case OP_EQUALVERIFY:
//case OP_NOTEQUAL: // use OP_NUMNOTEQUAL
@@ -810,8 +681,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
//
case OP_1ADD:
case OP_1SUB:
- case OP_2MUL:
- case OP_2DIV:
case OP_NEGATE:
case OP_ABS:
case OP_NOT:
@@ -825,8 +694,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
{
case OP_1ADD: bn += bnOne; break;
case OP_1SUB: bn -= bnOne; break;
- case OP_2MUL: bn <<= 1; break;
- case OP_2DIV: bn >>= 1; break;
case OP_NEGATE: bn = -bn; break;
case OP_ABS: if (bn < bnZero) bn = -bn; break;
case OP_NOT: bn = (bn == bnZero); break;
@@ -840,11 +707,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
case OP_ADD:
case OP_SUB:
- case OP_MUL:
- case OP_DIV:
- case OP_MOD:
- case OP_LSHIFT:
- case OP_RSHIFT:
case OP_BOOLAND:
case OP_BOOLOR:
case OP_NUMEQUAL:
@@ -873,33 +735,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
bn = bn1 - bn2;
break;
- case OP_MUL:
- if (!BN_mul(&bn, &bn1, &bn2, pctx))
- return false;
- break;
-
- case OP_DIV:
- if (!BN_div(&bn, NULL, &bn1, &bn2, pctx))
- return false;
- break;
-
- case OP_MOD:
- if (!BN_mod(&bn, &bn1, &bn2, pctx))
- return false;
- break;
-
- case OP_LSHIFT:
- if (bn2 < bnZero || bn2 > CBigNum(2048))
- return false;
- bn = bn1 << bn2.getulong();
- break;
-
- case OP_RSHIFT:
- if (bn2 < bnZero || bn2 > CBigNum(2048))
- return false;
- bn = bn1 >> bn2.getulong();
- break;
-
case OP_BOOLAND: bn = (bn1 != bnZero && bn2 != bnZero); break;
case OP_BOOLOR: bn = (bn1 != bnZero || bn2 != bnZero); break;
case OP_NUMEQUAL: bn = (bn1 == bn2); break;
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-02 15:19:38 +0000