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Diffstat (limited to 'bip-0062.mediawiki')
| -rw-r--r-- | bip-0062.mediawiki | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/bip-0062.mediawiki b/bip-0062.mediawiki index 7bd88a6..28b20dd 100644 --- a/bip-0062.mediawiki +++ b/bip-0062.mediawiki @@ -1,8 +1,10 @@ +'''NOTICE: This document is a work in progress and is not complete, implemented, or otherwise suitable for deployment.''' + <pre> BIP: 62 Title: Dealing with malleability Author: Pieter Wuille <pieter.wuille@gmail.com> - Status: Draft + Status: Withdrawn Type: Standards Track Created: 2014-03-12 </pre> @@ -38,7 +40,7 @@ The first six and part of the seventh can be fixed by extra consensus rules, but ===New rules=== Seven extra rules are introduced, to combat exactly the seven first sources of malleability listed above: -# '''Canonically encoded ECDSA signatures''' An ECDSA signature passed to OP_CHECKSIG, OP_CHECKSIGVERIFY, OP_CHECKMULTISIG or OP_CHECKMULTISIGVERIFY must be encoded using strict DER encoding. To provide a compact way to deliberately create an invalid signature for with OP_CHECKSIG and OP_CHECKMULTISIG the empty byte array (the result of OP_0) is also allowed. Doing a verification with a non-DER signature makes the entire script evaluate to False (not just the signature verification). See reference: [[#der-encoding|DER encoding]]. +# '''Canonically encoded ECDSA signatures''' An ECDSA signature passed to OP_CHECKSIG, OP_CHECKSIGVERIFY, OP_CHECKMULTISIG or OP_CHECKMULTISIGVERIFY must be encoded using strict DER encoding. To provide a compact way to deliberately create an invalid signature for OP_CHECKSIG and OP_CHECKMULTISIG, an empty byte array (i.e., the result of OP_0) is also allowed. Doing a verification with a non-DER signature makes the entire script evaluate to False (not just the signature verification). See reference: [[#der-encoding|DER encoding]]. # '''Non-push operations in scriptSig''' Only data pushes are allowed in scriptSig. Evaluating any other operation makes the script evaluate to false. See reference: [[#push-operators|Push operators]]. # '''Push operations in scriptSig of non-standard size type''' The smallest possible push operation must be used when possible. Pushing data using an operation that could be encoded in a shorter way makes the script evaluate to false. See reference: [[#push-operators|Push operators]]. # '''Zero-padded number pushes''' Any time a script opcode consumes a stack value that is interpreted as a number, it must be encoded in its shortest possible form. 'Negative zero' is not allowed. See reference: [[#numbers|Numbers]]. |