diff options
| -rw-r--r-- | src/script/interpreter.cpp | 5 | ||||
| -rw-r--r-- | src/test/data/script_invalid.json | 2 | ||||
| -rw-r--r-- | src/test/data/script_valid.json | 5 | ||||
| -rw-r--r-- | src/test/multisig_tests.cpp | 4 |
4 files changed, 11 insertions, 5 deletions
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp index d0f75ab672..8a06f3d118 100644 --- a/src/script/interpreter.cpp +++ b/src/script/interpreter.cpp @@ -189,6 +189,11 @@ bool static IsDefinedHashtypeSignature(const valtype &vchSig) { } bool static CheckSignatureEncoding(const valtype &vchSig, unsigned int flags, ScriptError* serror) { + // Empty signature. Not strictly DER encoded, but allowed to provide a + // compact way to provide an invalid signature for use with CHECK(MULTI)SIG + if (vchSig.size() == 0) { + return true; + } if ((flags & (SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_LOW_S | SCRIPT_VERIFY_STRICTENC)) != 0 && !IsDERSignature(vchSig)) { return set_error(serror, SCRIPT_ERR_SIG_DER); } else if ((flags & SCRIPT_VERIFY_LOW_S) != 0 && !IsLowDERSignature(vchSig, serror)) { diff --git a/src/test/data/script_invalid.json b/src/test/data/script_invalid.json index 42b79e7470..9a8fe1ee88 100644 --- a/src/test/data/script_invalid.json +++ b/src/test/data/script_invalid.json @@ -504,7 +504,7 @@ "2-of-2 CHECKMULTISIG NOT with the first pubkey invalid, and both signatures validly encoded." ], [ - "0 0x47 0x3044022044dc17b0887c161bb67ba9635bf758735bdde503e4b0a0987f587f14a4e1143d022009a215772d49a85dae40d8ca03955af26ad3978a0ff965faa12915e9586249a501 0", + "0 0x47 0x3044022044dc17b0887c161bb67ba9635bf758735bdde503e4b0a0987f587f14a4e1143d022009a215772d49a85dae40d8ca03955af26ad3978a0ff965faa12915e9586249a501 1", "2 0x21 0x02865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac0 0x21 0x02865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac0 2 CHECKMULTISIG NOT", "STRICTENC", "2-of-2 CHECKMULTISIG NOT with both pubkeys valid, but first signature invalid." diff --git a/src/test/data/script_valid.json b/src/test/data/script_valid.json index 5253d5e39e..a187401cd4 100644 --- a/src/test/data/script_valid.json +++ b/src/test/data/script_valid.json @@ -662,6 +662,11 @@ ["0 0 0x02 0x0000", "CHECKMULTISIGVERIFY 1", ""], ["0 0x02 0x0000 0", "CHECKMULTISIGVERIFY 1", ""], +["While not really correctly DER encoded, the empty signature is allowed by"], +["STRICTENC to provide a compact way to provide a delibrately invalid signature."], +["0", "0x21 0x02865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac0 CHECKSIG NOT", "STRICTENC"], +["0 0", "1 0x21 0x02865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac0 1 CHECKMULTISIG NOT", "STRICTENC"], + ["CHECKMULTISIG evaluation order tests. CHECKMULTISIG evaluates signatures and"], ["pubkeys in a specific order, and will exit early if the number of signatures"], ["left to check is greater than the number of keys left. As STRICTENC fails the"], diff --git a/src/test/multisig_tests.cpp b/src/test/multisig_tests.cpp index 69d8522188..9501169943 100644 --- a/src/test/multisig_tests.cpp +++ b/src/test/multisig_tests.cpp @@ -116,10 +116,6 @@ BOOST_AUTO_TEST_CASE(multisig_verify) } } s.clear(); - s << OP_0 << OP_0; - BOOST_CHECK(!VerifyScript(s, a_or_b, flags, SignatureChecker(txTo[1], 0), &err)); - BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_SIG_DER, ScriptErrorString(err)); - s.clear(); s << OP_0 << OP_1; BOOST_CHECK(!VerifyScript(s, a_or_b, flags, SignatureChecker(txTo[1], 0), &err)); BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_SIG_DER, ScriptErrorString(err)); |