diff options
Diffstat (limited to 'src/script/interpreter.cpp')
| -rw-r--r-- | src/script/interpreter.cpp | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp index 62042e8e70..927b0267ca 100644 --- a/src/script/interpreter.cpp +++ b/src/script/interpreter.cpp @@ -1,5 +1,5 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2016 The Bitcoin Core developers +// Copyright (c) 2009-2017 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -226,23 +226,25 @@ bool static CheckPubKeyEncoding(const valtype &vchPubKey, unsigned int flags, co } bool static 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) { - // Could have used OP_0. + // Should have used OP_0. return opcode == OP_0; } else if (data.size() == 1 && data[0] >= 1 && data[0] <= 16) { - // Could have used OP_1 .. OP_16. - return opcode == OP_1 + (data[0] - 1); + // Should have used OP_1 .. OP_16. + return false; } else if (data.size() == 1 && data[0] == 0x81) { - // Could have used OP_1NEGATE. - return opcode == OP_1NEGATE; + // Should have used OP_1NEGATE. + return false; } else if (data.size() <= 75) { - // Could have used a direct push (opcode indicating number of bytes pushed + those bytes). + // Must have used a direct push (opcode indicating number of bytes pushed + those bytes). return opcode == data.size(); } else if (data.size() <= 255) { - // Could have used OP_PUSHDATA. + // Must have used OP_PUSHDATA. return opcode == OP_PUSHDATA1; } else if (data.size() <= 65535) { - // Could have used OP_PUSHDATA2. + // Must have used OP_PUSHDATA2. return opcode == OP_PUSHDATA2; } return true; |