diff options
Diffstat (limited to 'src/script')
-rw-r--r-- | src/script/script.cpp | 13 | ||||
-rw-r--r-- | src/script/script.h | 6 |
2 files changed, 19 insertions, 0 deletions
diff --git a/src/script/script.cpp b/src/script/script.cpp index 70eb8a139b..a10b619f7d 100644 --- a/src/script/script.cpp +++ b/src/script/script.cpp @@ -267,3 +267,16 @@ std::string CScriptWitness::ToString() const } return ret + ")"; } + +bool CScript::HasValidOps() const +{ + CScript::const_iterator it = begin(); + while (it < end()) { + opcodetype opcode; + std::vector<unsigned char> item; + if (!GetOp(it, opcode, item) || opcode > MAX_OPCODE || item.size() > MAX_SCRIPT_ELEMENT_SIZE) { + return false; + } + } + return true; +} diff --git a/src/script/script.h b/src/script/script.h index 95a5999a13..23706b9826 100644 --- a/src/script/script.h +++ b/src/script/script.h @@ -190,6 +190,9 @@ enum opcodetype OP_INVALIDOPCODE = 0xff, }; +// Maximum value that an opcode can be +static const unsigned int MAX_OPCODE = OP_NOP10; + const char* GetOpName(opcodetype opcode); class scriptnum_error : public std::runtime_error @@ -630,6 +633,9 @@ public: bool IsPushOnly(const_iterator pc) const; bool IsPushOnly() const; + /** Check if the script contains valid OP_CODES */ + bool HasValidOps() const; + /** * Returns whether the script is guaranteed to fail at execution, * regardless of the initial stack. This allows outputs to be pruned |