use std::{cmp, mem}; use bytes::Bytes; use keys::{Signature, Public}; use chain::constants::SEQUENCE_LOCKTIME_DISABLE_FLAG; use crypto::{sha1, sha256, dhash160, dhash256, ripemd160}; use sign::{SignatureVersion, Sighash}; use { script, Script, Num, VerificationFlags, Opcode, Error, SignatureChecker, Stack }; /// Helper function. fn check_signature( checker: &SignatureChecker, mut script_sig: Vec, public: Vec, script_code: &Script, version: SignatureVersion ) -> bool { let public = match Public::from_slice(&public) { Ok(public) => public, _ => return false, }; if script_sig.is_empty() { return false; } let hash_type = script_sig.pop().unwrap() as u32; let signature = script_sig.into(); checker.check_signature(&signature, &public, script_code, hash_type, version) } fn is_public_key(v: &[u8]) -> bool { match v.len() { 33 if v[0] == 2 || v[0] == 3 => true, 65 if v[0] == 4 => true, _ => false, } } /// A canonical signature exists of: <30> <02> <02> /// Where R and S are not negative (their first byte has its highest bit not set), and not /// excessively padded (do not start with a 0 byte, unless an otherwise negative number follows, /// in which case a single 0 byte is necessary and even required). /// /// See https://bitcointalk.org/index.php?topic=8392.msg127623#msg127623 /// /// This function is consensus-critical since BIP66. fn is_valid_signature_encoding(sig: &[u8]) -> bool { // Format: 0x30 [total-length] 0x02 [R-length] [R] 0x02 [S-length] [S] [sighash] // * total-length: 1-byte length descriptor of everything that follows, // excluding the sighash byte. // * R-length: 1-byte length descriptor of the R value that follows. // * R: arbitrary-length big-endian encoded R value. It must use the shortest // possible encoding for a positive integers (which means no null bytes at // the start, except a single one when the next byte has its highest bit set). // * S-length: 1-byte length descriptor of the S value that follows. // * S: arbitrary-length big-endian encoded S value. The same rules apply. // * sighash: 1-byte value indicating what data is hashed (not part of the DER // signature) // Minimum and maximum size constraints if sig.len() < 9 || sig.len() > 73 { return false; } // A signature is of type 0x30 (compound) if sig[0] != 0x30 { return false; } // Make sure the length covers the entire signature. if sig[1] as usize != sig.len() - 3 { return false; } // Extract the length of the R element. let len_r = sig[3] as usize; // Make sure the length of the S element is still inside the signature. if len_r + 5 >= sig.len() { return false; } // Extract the length of the S element. let len_s = sig[len_r + 5] as usize; // Verify that the length of the signature matches the sum of the length if len_r + len_s + 7 != sig.len() { return false; } // Check whether the R element is an integer. if sig[2] != 2 { return false; } // Zero-length integers are not allowed for R. if len_r == 0 { return false; } // Negative numbers are not allowed for R. if (sig[4] & 0x80) != 0 { return false; } // Null bytes at the start of R are not allowed, unless R would // otherwise be interpreted as a negative number. if len_r > 1 && sig[4] == 0 && (!(sig[5] & 0x80)) != 0 { return false; } // Check whether the S element is an integer. if sig[len_r + 4] != 2 { return false; } // Zero-length integers are not allowed for S. if len_s == 0 { return false; } // Negative numbers are not allowed for S. if (sig[len_r + 6] & 0x80) != 0 { return false; } // Null bytes at the start of S are not allowed, unless S would otherwise be // interpreted as a negative number. if len_s > 1 && (sig[len_r + 6] == 0) && (!(sig[len_r + 7] & 0x80)) != 0 { return false; } true } fn is_low_der_signature(sig: &[u8]) -> Result<(), Error> { if !is_valid_signature_encoding(sig) { return Err(Error::SignatureDer); } let signature: Signature = sig.into(); if !signature.check_low_s() { return Err(Error::SignatureHighS); } Ok(()) } fn is_defined_hashtype_signature(sig: &[u8]) -> bool { if sig.is_empty() { return false; } Sighash::is_defined(sig[sig.len() -1] as u32) } fn check_signature_encoding(sig: &[u8], flags: &VerificationFlags) -> Result<(), Error> { // 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 sig.is_empty() { return Ok(()); } if (flags.verify_dersig || flags.verify_low_s || flags.verify_strictenc) && !is_valid_signature_encoding(sig) { return Err(Error::SignatureDer); } if flags.verify_low_s { try!(is_low_der_signature(sig)); } if flags.verify_strictenc && !is_defined_hashtype_signature(sig) { Err(Error::SignatureHashtype) } else { Ok(()) } } fn check_pubkey_encoding(v: &[u8], flags: &VerificationFlags) -> Result<(), Error> { if flags.verify_strictenc && !is_public_key(v) { return Err(Error::PubkeyType); } Ok(()) } fn check_minimal_push(data: &[u8], opcode: Opcode) -> bool { if data.is_empty() { // Could have used OP_0. opcode == Opcode::OP_0 } else if data.len() == 1 && data[0] >= 1 && data[0] <= 16 { // Could have used OP_1 .. OP_16. opcode as u8 == Opcode::OP_1 as u8 + (data[0] - 1) } else if data.len() == 1 && data[0] == 0x81 { // Could have used OP_1NEGATE opcode == Opcode::OP_1NEGATE } else if data.len() <= 75 { // Could have used a direct push (opcode indicating number of bytes pushed + those bytes). opcode as usize == data.len() } else if data.len() <= 255 { // Could have used OP_PUSHDATA. opcode == Opcode::OP_PUSHDATA1 } else if data.len() <= 65535 { // Could have used OP_PUSHDATA2. opcode == Opcode::OP_PUSHDATA2 } else { true } } fn cast_to_bool(data: &[u8]) -> bool { if data.is_empty() { return false; } if data[..data.len() - 1].iter().any(|x| x != &0) { return true; } let last = data[data.len() - 1]; !(last == 0 || last == 0x80) } /// Verifies script signature and pubkey pub fn verify_script( script_sig: &Script, script_pubkey: &Script, flags: &VerificationFlags, checker: &SignatureChecker ) -> Result<(), Error> { if flags.verify_sigpushonly && !script_sig.is_push_only() { return Err(Error::SignaturePushOnly); } let mut stack = Stack::new(); let mut stack_copy = Stack::new(); try!(eval_script(&mut stack, script_sig, flags, checker, SignatureVersion::Base)); if flags.verify_p2sh { stack_copy = stack.clone(); } let res = try!(eval_script(&mut stack, script_pubkey, flags, checker, SignatureVersion::Base)); if !res { return Err(Error::EvalFalse); } // Additional validation for spend-to-script-hash transactions: if flags.verify_p2sh && script_pubkey.is_pay_to_script_hash() { if !script_sig.is_push_only() { return Err(Error::SignaturePushOnly); } mem::swap(&mut stack, &mut stack_copy); // stack cannot be empty here, because if it was the // P2SH HASH <> EQUAL scriptPubKey would be evaluated with // an empty stack and the EvalScript above would return false. assert!(!stack.is_empty()); let pubkey2: Script = try!(stack.pop()).into(); let res = try!(eval_script(&mut stack, &pubkey2, flags, checker, SignatureVersion::Base)); if !res { return Err(Error::EvalFalse); } } // The CLEANSTACK check is only performed after potential P2SH evaluation, // as the non-P2SH evaluation of a P2SH script will obviously not result in // a clean stack (the P2SH inputs remain). The same holds for witness evaluation. if flags.verify_cleanstack { // Disallow CLEANSTACK without P2SH, as otherwise a switch CLEANSTACK->P2SH+CLEANSTACK // would be possible, which is not a softfork (and P2SH should be one). assert!(flags.verify_p2sh); assert!(flags.verify_witness); if stack.len() != 1 { return Err(Error::Cleanstack); } } Ok(()) } /// Evaluautes the script #[cfg_attr(feature="cargo-clippy", allow(match_same_arms))] pub fn eval_script( stack: &mut Stack, script: &Script, flags: &VerificationFlags, checker: &SignatureChecker, version: SignatureVersion ) -> Result { if script.len() > script::MAX_SCRIPT_SIZE { return Err(Error::ScriptSize); } let mut pc = 0; let mut op_count = 0; let mut begincode = 0; let mut exec_stack = Vec::::new(); let mut altstack = Stack::::new(); while pc < script.len() { let executing = exec_stack.iter().all(|x| *x); let instruction = match script.get_instruction(pc) { Ok(i) => i, Err(Error::BadOpcode) if !executing => { pc += 1; continue; }, Err(err) => return Err(err), }; let opcode = instruction.opcode; if let Some(data) = instruction.data { if data.len() > script::MAX_SCRIPT_ELEMENT_SIZE { return Err(Error::PushSize); } if executing && flags.verify_minimaldata && !check_minimal_push(data, opcode) { return Err(Error::Minimaldata); } } if opcode.is_countable() { op_count += 1; if op_count > script::MAX_OPS_PER_SCRIPT { return Err(Error::OpCount); } } if opcode.is_disabled() { return Err(Error::DisabledOpcode(opcode)); } if !(executing || (Opcode::OP_IF <= opcode && opcode <= Opcode::OP_ENDIF)) { pc += instruction.step; continue; } match opcode { Opcode::OP_PUSHDATA1 | Opcode::OP_PUSHDATA2 | Opcode::OP_PUSHDATA4 | Opcode::OP_0 | Opcode::OP_PUSHBYTES_1 | Opcode::OP_PUSHBYTES_2 | Opcode::OP_PUSHBYTES_3 | Opcode::OP_PUSHBYTES_4 | Opcode::OP_PUSHBYTES_5 | Opcode::OP_PUSHBYTES_6 | Opcode::OP_PUSHBYTES_7 | Opcode::OP_PUSHBYTES_8 | Opcode::OP_PUSHBYTES_9 | Opcode::OP_PUSHBYTES_10 | Opcode::OP_PUSHBYTES_11 | Opcode::OP_PUSHBYTES_12 | Opcode::OP_PUSHBYTES_13 | Opcode::OP_PUSHBYTES_14 | Opcode::OP_PUSHBYTES_15 | Opcode::OP_PUSHBYTES_16 | Opcode::OP_PUSHBYTES_17 | Opcode::OP_PUSHBYTES_18 | Opcode::OP_PUSHBYTES_19 | Opcode::OP_PUSHBYTES_20 | Opcode::OP_PUSHBYTES_21 | Opcode::OP_PUSHBYTES_22 | Opcode::OP_PUSHBYTES_23 | Opcode::OP_PUSHBYTES_24 | Opcode::OP_PUSHBYTES_25 | Opcode::OP_PUSHBYTES_26 | Opcode::OP_PUSHBYTES_27 | Opcode::OP_PUSHBYTES_28 | Opcode::OP_PUSHBYTES_29 | Opcode::OP_PUSHBYTES_30 | Opcode::OP_PUSHBYTES_31 | Opcode::OP_PUSHBYTES_32 | Opcode::OP_PUSHBYTES_33 | Opcode::OP_PUSHBYTES_34 | Opcode::OP_PUSHBYTES_35 | Opcode::OP_PUSHBYTES_36 | Opcode::OP_PUSHBYTES_37 | Opcode::OP_PUSHBYTES_38 | Opcode::OP_PUSHBYTES_39 | Opcode::OP_PUSHBYTES_40 | Opcode::OP_PUSHBYTES_41 | Opcode::OP_PUSHBYTES_42 | Opcode::OP_PUSHBYTES_43 | Opcode::OP_PUSHBYTES_44 | Opcode::OP_PUSHBYTES_45 | Opcode::OP_PUSHBYTES_46 | Opcode::OP_PUSHBYTES_47 | Opcode::OP_PUSHBYTES_48 | Opcode::OP_PUSHBYTES_49 | Opcode::OP_PUSHBYTES_50 | Opcode::OP_PUSHBYTES_51 | Opcode::OP_PUSHBYTES_52 | Opcode::OP_PUSHBYTES_53 | Opcode::OP_PUSHBYTES_54 | Opcode::OP_PUSHBYTES_55 | Opcode::OP_PUSHBYTES_56 | Opcode::OP_PUSHBYTES_57 | Opcode::OP_PUSHBYTES_58 | Opcode::OP_PUSHBYTES_59 | Opcode::OP_PUSHBYTES_60 | Opcode::OP_PUSHBYTES_61 | Opcode::OP_PUSHBYTES_62 | Opcode::OP_PUSHBYTES_63 | Opcode::OP_PUSHBYTES_64 | Opcode::OP_PUSHBYTES_65 | Opcode::OP_PUSHBYTES_66 | Opcode::OP_PUSHBYTES_67 | Opcode::OP_PUSHBYTES_68 | Opcode::OP_PUSHBYTES_69 | Opcode::OP_PUSHBYTES_70 | Opcode::OP_PUSHBYTES_71 | Opcode::OP_PUSHBYTES_72 | Opcode::OP_PUSHBYTES_73 | Opcode::OP_PUSHBYTES_74 | Opcode::OP_PUSHBYTES_75 => { if let Some(data) = instruction.data { stack.push(data.to_vec().into()); } }, Opcode::OP_1NEGATE | Opcode::OP_1 | Opcode::OP_2 | Opcode::OP_3 | Opcode::OP_4 | Opcode::OP_5 | Opcode::OP_6 | Opcode::OP_7 | Opcode::OP_8 | Opcode::OP_9 | Opcode::OP_10 | Opcode::OP_11 | Opcode::OP_12 | Opcode::OP_13 | Opcode::OP_14 | Opcode::OP_15 | Opcode::OP_16 => { let value = (opcode as i32).wrapping_sub(Opcode::OP_1 as i32 - 1); stack.push(Num::from(value).to_bytes()); }, Opcode::OP_CAT | Opcode::OP_SUBSTR | Opcode::OP_LEFT | Opcode::OP_RIGHT | Opcode::OP_INVERT | Opcode::OP_AND | Opcode::OP_OR | Opcode::OP_XOR | Opcode::OP_2MUL | Opcode::OP_2DIV | Opcode::OP_MUL | Opcode::OP_DIV | Opcode::OP_MOD | Opcode::OP_LSHIFT | Opcode::OP_RSHIFT => { return Err(Error::DisabledOpcode(opcode)); }, Opcode::OP_NOP => break, Opcode::OP_CHECKLOCKTIMEVERIFY => { if flags.verify_clocktimeverify { // Note that elsewhere numeric opcodes are limited to // operands in the range -2**31+1 to 2**31-1, however it is // legal for opcodes to produce results exceeding that // range. This limitation is implemented by CScriptNum's // default 4-byte limit. // // If we kept to that limit we'd have a year 2038 problem, // even though the nLockTime field in transactions // themselves is uint32 which only becomes meaningless // after the year 2106. // // Thus as a special case we tell CScriptNum to accept up // to 5-byte bignums, which are good until 2**39-1, well // beyond the 2**32-1 limit of the nLockTime field itself. let lock_time = try!(Num::from_slice(try!(stack.last()), flags.verify_minimaldata, 5)); // In the rare event that the argument may be < 0 due to // some arithmetic being done first, you can always use // 0 MAX CHECKLOCKTIMEVERIFY. if lock_time.is_negative() { return Err(Error::NegativeLocktime); } if !checker.check_lock_time(lock_time) { return Err(Error::UnsatisfiedLocktime); } } else if flags.verify_discourage_upgradable_nops { return Err(Error::DiscourageUpgradableNops); } }, Opcode::OP_CHECKSEQUENCEVERIFY => { if flags.verify_checksequenceverify { let sequence = try!(Num::from_slice(try!(stack.last()), flags.verify_minimaldata, 5)); if sequence.is_negative() { return Err(Error::NegativeLocktime); } if (sequence & (SEQUENCE_LOCKTIME_DISABLE_FLAG as i64).into()).is_zero() && !checker.check_sequence(sequence) { return Err(Error::UnsatisfiedLocktime); } } else if flags.verify_discourage_upgradable_nops { return Err(Error::DiscourageUpgradableNops); } }, Opcode::OP_NOP1 | Opcode::OP_NOP4 | Opcode::OP_NOP5 | Opcode::OP_NOP6 | Opcode::OP_NOP7 | Opcode::OP_NOP8 | Opcode::OP_NOP9 | Opcode::OP_NOP10 => { if flags.verify_discourage_upgradable_nops { return Err(Error::DiscourageUpgradableNops); } }, Opcode::OP_IF | Opcode::OP_NOTIF => { let mut exec_value = false; if executing { exec_value = cast_to_bool(&try!(stack.pop().map_err(|_| Error::UnbalancedConditional))); if opcode == Opcode::OP_NOTIF { exec_value = !exec_value; } } exec_stack.push(exec_value); }, Opcode::OP_ELSE => { if exec_stack.is_empty() { return Err(Error::UnbalancedConditional); } let last_index = exec_stack.len() - 1; let last = exec_stack[last_index]; exec_stack[last_index] = !last; }, Opcode::OP_ENDIF => { if exec_stack.is_empty() { return Err(Error::UnbalancedConditional); } exec_stack.pop(); }, Opcode::OP_VERIFY => { let exec_value = cast_to_bool(&try!(stack.pop())); if !exec_value { return Err(Error::Verify); } }, Opcode::OP_RETURN => { return Err(Error::ReturnOpcode); }, Opcode::OP_TOALTSTACK => { altstack.push(try!(stack.pop())); }, Opcode::OP_FROMALTSTACK => { stack.push(try!(altstack.pop().map_err(|_| Error::InvalidAltstackOperation))); }, Opcode::OP_2DROP => { try!(stack.drop(2)); }, Opcode::OP_2DUP => { try!(stack.dup(2)); }, Opcode::OP_3DUP => { try!(stack.dup(3)); }, Opcode::OP_2OVER => { try!(stack.over(2)); }, Opcode::OP_2ROT => { try!(stack.rot(2)); }, Opcode::OP_2SWAP => { try!(stack.swap(2)); }, Opcode::OP_IFDUP => { if cast_to_bool(try!(stack.last())) { try!(stack.dup(1)); } }, Opcode::OP_DEPTH => { let depth = Num::from(stack.len()); stack.push(depth.to_bytes()); }, Opcode::OP_DROP => { try!(stack.pop()); }, Opcode::OP_DUP => { try!(stack.dup(1)); }, Opcode::OP_NIP => { try!(stack.nip()); }, Opcode::OP_OVER => { try!(stack.over(1)); }, Opcode::OP_PICK | Opcode::OP_ROLL => { let n: i64 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)).into(); if n < 0 || n >= stack.len() as i64 { return Err(Error::InvalidStackOperation); } let v = match opcode { Opcode::OP_PICK => try!(stack.top(n as usize)).clone(), _ => try!(stack.remove(n as usize)), }; stack.push(v); }, Opcode::OP_ROT => { try!(stack.rot(1)); }, Opcode::OP_SWAP => { try!(stack.swap(1)); }, Opcode::OP_TUCK => { try!(stack.tuck()); }, Opcode::OP_SIZE => { let n = Num::from(try!(stack.last()).len()); stack.push(n.to_bytes()); }, Opcode::OP_EQUAL => { let v1 = try!(stack.pop()); let v2 = try!(stack.pop()); if v1 == v2 { stack.push(vec![1].into()); } else { stack.push(vec![0].into()); } }, Opcode::OP_EQUALVERIFY => { let equal = try!(stack.pop()) == try!(stack.pop()); if !equal { return Err(Error::EqualVerify); } }, Opcode::OP_1ADD => { let n = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)) + 1.into(); stack.push(n.to_bytes()); }, Opcode::OP_1SUB => { let n = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)) - 1.into(); stack.push(n.to_bytes()); }, Opcode::OP_NEGATE => { let n = -try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); stack.push(n.to_bytes()); }, Opcode::OP_ABS => { let n = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)).abs(); stack.push(n.to_bytes()); }, Opcode::OP_NOT => { let n = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)).is_zero(); let n = Num::from(n); stack.push(n.to_bytes()); }, Opcode::OP_0NOTEQUAL => { let n = !try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)).is_zero(); let n = Num::from(n); stack.push(n.to_bytes()); }, Opcode::OP_ADD => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); stack.push((v1 + v2).to_bytes()); }, Opcode::OP_SUB => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); stack.push((v2 - v1).to_bytes()); }, Opcode::OP_BOOLAND => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(!v1.is_zero() && !v2.is_zero()); stack.push(v.to_bytes()); }, Opcode::OP_BOOLOR => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(!v1.is_zero() || !v2.is_zero()); stack.push(v.to_bytes()); }, Opcode::OP_NUMEQUAL => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(v1 == v2); stack.push(v.to_bytes()); }, Opcode::OP_NUMEQUALVERIFY => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); if v1 != v2 { return Err(Error::NumEqualVerify); } }, Opcode::OP_NUMNOTEQUAL => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(v1 != v2); stack.push(v.to_bytes()); }, Opcode::OP_LESSTHAN => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(v1 > v2); stack.push(v.to_bytes()); }, Opcode::OP_GREATERTHAN => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(v1 < v2); stack.push(v.to_bytes()); }, Opcode::OP_LESSTHANOREQUAL => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(v1 >= v2); stack.push(v.to_bytes()); }, Opcode::OP_GREATERTHANOREQUAL => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v = Num::from(v1 <= v2); stack.push(v.to_bytes()); }, Opcode::OP_MIN => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); stack.push(cmp::min(v1, v2).to_bytes()); }, Opcode::OP_MAX => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); stack.push(cmp::max(v1, v2).to_bytes()); }, Opcode::OP_WITHIN => { let v1 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v2 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); let v3 = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); if v2 <= v3 && v3 < v1 { stack.push(vec![1].into()); } else { stack.push(vec![0].into()); } }, Opcode::OP_RIPEMD160 => { let v = ripemd160(&try!(stack.pop())); stack.push(v.to_vec().into()); }, Opcode::OP_SHA1 => { let v = sha1(&try!(stack.pop())); stack.push(v.to_vec().into()); }, Opcode::OP_SHA256 => { let v = sha256(&try!(stack.pop())); stack.push(v.to_vec().into()); }, Opcode::OP_HASH160 => { let v = dhash160(&try!(stack.pop())); stack.push(v.to_vec().into()); }, Opcode::OP_HASH256 => { let v = dhash256(&try!(stack.pop())); stack.push(v.to_vec().into()); }, Opcode::OP_CODESEPARATOR => { begincode = pc; }, Opcode::OP_CHECKSIG | Opcode::OP_CHECKSIGVERIFY => { let pubkey = try!(stack.pop()); let signature = try!(stack.pop()); let mut subscript = script.subscript(begincode); if version == SignatureVersion::Base { subscript = subscript.find_and_delete(&signature); } try!(check_signature_encoding(&signature, flags)); try!(check_pubkey_encoding(&pubkey, flags)); let success = check_signature(checker, signature.into(), pubkey.into(), &subscript, version); match opcode { Opcode::OP_CHECKSIG => { if success { stack.push(vec![1].into()); } else { stack.push(vec![0].into()); } }, Opcode::OP_CHECKSIGVERIFY if !success => { return Err(Error::CheckSigVerify); }, _ => {}, } }, Opcode::OP_CHECKMULTISIG | Opcode::OP_CHECKMULTISIGVERIFY => { let keys_count = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); if keys_count < 0.into() || keys_count > script::MAX_PUBKEYS_PER_MULTISIG.into() { return Err(Error::PubkeyCount); } let keys_count: usize = keys_count.into(); let keys: Vec<_> = try!((0..keys_count).into_iter().map(|_| stack.pop()).rev().collect()); let sigs_count = try!(Num::from_slice(&try!(stack.pop()), flags.verify_minimaldata, 4)); if sigs_count < 0.into() || sigs_count > keys_count.into() { return Err(Error::SigCount); } let sigs_count: usize = sigs_count.into(); let sigs: Vec<_> = try!((0..sigs_count).into_iter().map(|_| stack.pop()).rev().collect()); let mut subscript = script.subscript(begincode); if version == SignatureVersion::Base { for signature in &sigs { subscript = subscript.find_and_delete(signature); } } let mut success = true; let mut k = 0; let mut s = 0; while s < sigs.len() && success { // TODO: remove redundant copying let key = keys[k].clone(); let sig = sigs[s].clone(); try!(check_signature_encoding(&sig, flags)); try!(check_pubkey_encoding(&key, flags)); let ok = check_signature(checker, sig.into(), key.into(), &subscript, version); if ok { s += 1; } k += 1; success = sigs.len() - s <= keys.len() - k; } if !try!(stack.pop()).is_empty() && flags.verify_nulldummy { return Err(Error::SignatureNullDummy); } match opcode { Opcode::OP_CHECKMULTISIG => { if success { stack.push(vec![1].into()); } else { stack.push(vec![0].into()); } }, Opcode::OP_CHECKMULTISIGVERIFY if !success => { return Err(Error::CheckSigVerify); }, _ => {}, } }, Opcode::OP_RESERVED | Opcode::OP_VER | Opcode::OP_RESERVED1 | Opcode::OP_RESERVED2 => { if executing { return Err(Error::DisabledOpcode(opcode)); } }, Opcode::OP_VERIF | Opcode::OP_VERNOTIF => { return Err(Error::DisabledOpcode(opcode)); }, } if stack.len() + altstack.len() > 1000 { return Err(Error::StackSize); } pc += instruction.step; } if !exec_stack.is_empty() { return Err(Error::UnbalancedConditional); } let success = !stack.is_empty() && { let last = try!(stack.last()); cast_to_bool(last) }; Ok(success) } #[cfg(test)] mod tests { use bytes::Bytes; use chain::Transaction; use sign::SignatureVersion; use { Opcode, Script, VerificationFlags, Builder, Error, Num, TransactionInputSigner, NoopSignatureChecker, TransactionSignatureChecker, Stack }; use super::{eval_script, verify_script, is_public_key}; #[test] fn tests_is_public_key() { assert!(!is_public_key(&[])); assert!(!is_public_key(&[1])); assert!(is_public_key(&Bytes::from("0495dfb90f202c7d016ef42c65bc010cd26bb8237b06253cc4d12175097bef767ed6b1fcb3caf1ed57c98d92e6cb70278721b952e29a335134857acd4c199b9d2f"))); assert!(is_public_key(&[2; 33])); assert!(is_public_key(&[3; 33])); assert!(!is_public_key(&[4; 33])); } // https://github.com/bitcoin/bitcoin/blob/d612837814020ae832499d18e6ee5eb919a87907/src/test/script_tests.cpp#L900 #[test] fn test_push_data() { let expected: Stack = vec![vec![0x5a].into()].into(); let flags = VerificationFlags::default() .verify_p2sh(true); let checker = NoopSignatureChecker; let version = SignatureVersion::Base; let direct: Script = vec![Opcode::OP_PUSHBYTES_1 as u8, 0x5a].into(); let pushdata1: Script = vec![Opcode::OP_PUSHDATA1 as u8, 0x1, 0x5a].into(); let pushdata2: Script = vec![Opcode::OP_PUSHDATA2 as u8, 0x1, 0, 0x5a].into(); let pushdata4: Script = vec![Opcode::OP_PUSHDATA4 as u8, 0x1, 0, 0, 0, 0x5a].into(); let mut direct_stack = Stack::new(); let mut pushdata1_stack = Stack::new(); let mut pushdata2_stack = Stack::new(); let mut pushdata4_stack = Stack::new(); assert!(eval_script(&mut direct_stack, &direct, &flags, &checker, version).unwrap()); assert!(eval_script(&mut pushdata1_stack, &pushdata1, &flags, &checker, version).unwrap()); assert!(eval_script(&mut pushdata2_stack, &pushdata2, &flags, &checker, version).unwrap()); assert!(eval_script(&mut pushdata4_stack, &pushdata4, &flags, &checker, version).unwrap()); assert_eq!(direct_stack, expected); assert_eq!(pushdata1_stack, expected); assert_eq!(pushdata2_stack, expected); assert_eq!(pushdata4_stack, expected); } fn basic_test(script: &Script, expected: Result, expected_stack: Stack) { let flags = VerificationFlags::default() .verify_p2sh(true); let checker = NoopSignatureChecker; let version = SignatureVersion::Base; let mut stack = Stack::new(); assert_eq!(eval_script(&mut stack, script, &flags, &checker, version), expected); if expected.is_ok() { assert_eq!(stack, expected_stack); } } #[test] fn test_equal() { let script = Builder::default() .push_data(&[0x4]) .push_data(&[0x4]) .push_opcode(Opcode::OP_EQUAL) .into_script(); let result = Ok(true); let stack = vec![vec![1].into()].into(); basic_test(&script, result, stack); } #[test] fn test_equal_false() { let script = Builder::default() .push_data(&[0x4]) .push_data(&[0x3]) .push_opcode(Opcode::OP_EQUAL) .into_script(); let result = Ok(false); let stack = vec![vec![0].into()].into(); basic_test(&script, result, stack); } #[test] fn test_equal_invalid_stack() { let script = Builder::default() .push_data(&[0x4]) .push_opcode(Opcode::OP_EQUAL) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_equal_verify() { let script = Builder::default() .push_data(&[0x4]) .push_data(&[0x4]) .push_opcode(Opcode::OP_EQUALVERIFY) .into_script(); let result = Ok(false); let stack = Stack::default(); basic_test(&script, result, stack); } #[test] fn test_equal_verify_failed() { let script = Builder::default() .push_data(&[0x4]) .push_data(&[0x3]) .push_opcode(Opcode::OP_EQUALVERIFY) .into_script(); let result = Err(Error::EqualVerify); basic_test(&script, result, Stack::default()); } #[test] fn test_equal_verify_invalid_stack() { let script = Builder::default() .push_data(&[0x4]) .push_opcode(Opcode::OP_EQUALVERIFY) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_size() { let script = Builder::default() .push_data(&[0x12, 0x34]) .push_opcode(Opcode::OP_SIZE) .into_script(); let result = Ok(true); let stack = vec![vec![0x12, 0x34].into(), vec![0x2].into()].into(); basic_test(&script, result, stack); } #[test] fn test_size_false() { let script = Builder::default() .push_data(&[]) .push_opcode(Opcode::OP_SIZE) .into_script(); let result = Ok(false); let stack = vec![vec![].into(), vec![].into()].into(); basic_test(&script, result, stack); } #[test] fn test_size_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_SIZE) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_hash256() { let script = Builder::default() .push_data(b"hello") .push_opcode(Opcode::OP_HASH256) .into_script(); let result = Ok(true); let stack = vec!["9595c9df90075148eb06860365df33584b75bff782a510c6cd4883a419833d50".into()].into(); basic_test(&script, result, stack); } #[test] fn test_hash256_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_HASH256) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_ripemd160() { let script = Builder::default() .push_data(b"hello") .push_opcode(Opcode::OP_RIPEMD160) .into_script(); let result = Ok(true); let stack = vec!["108f07b8382412612c048d07d13f814118445acd".into()].into(); basic_test(&script, result, stack); } #[test] fn test_ripemd160_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_RIPEMD160) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_sha1() { let script = Builder::default() .push_data(b"hello") .push_opcode(Opcode::OP_SHA1) .into_script(); let result = Ok(true); let stack = vec!["aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d".into()].into(); basic_test(&script, result, stack); } #[test] fn test_sha1_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_SHA1) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_sha256() { let script = Builder::default() .push_data(b"hello") .push_opcode(Opcode::OP_SHA256) .into_script(); let result = Ok(true); let stack = vec!["2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824".into()].into(); basic_test(&script, result, stack); } #[test] fn test_sha256_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_SHA256) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_1add() { let script = Builder::default() .push_num(5.into()) .push_opcode(Opcode::OP_1ADD) .into_script(); let result = Ok(true); let stack = vec![Num::from(6).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_1add_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_1ADD) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_1sub() { let script = Builder::default() .push_num(5.into()) .push_opcode(Opcode::OP_1SUB) .into_script(); let result = Ok(true); let stack = vec![Num::from(4).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_1sub_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_1SUB) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_negate() { let script = Builder::default() .push_num(5.into()) .push_opcode(Opcode::OP_NEGATE) .into_script(); let result = Ok(true); let stack = vec![Num::from(-5).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_negate_negative() { let script = Builder::default() .push_num((-5).into()) .push_opcode(Opcode::OP_NEGATE) .into_script(); let result = Ok(true); let stack = vec![Num::from(5).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_negate_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_NEGATE) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_abs() { let script = Builder::default() .push_num(5.into()) .push_opcode(Opcode::OP_ABS) .into_script(); let result = Ok(true); let stack = vec![Num::from(5).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_abs_negative() { let script = Builder::default() .push_num((-5).into()) .push_opcode(Opcode::OP_ABS) .into_script(); let result = Ok(true); let stack = vec![Num::from(5).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_abs_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_ABS) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_not() { let script = Builder::default() .push_num(4.into()) .push_opcode(Opcode::OP_NOT) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_not_zero() { let script = Builder::default() .push_num(0.into()) .push_opcode(Opcode::OP_NOT) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_not_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_NOT) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_0notequal() { let script = Builder::default() .push_num(4.into()) .push_opcode(Opcode::OP_0NOTEQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_0notequal_zero() { let script = Builder::default() .push_num(0.into()) .push_opcode(Opcode::OP_0NOTEQUAL) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_0notequal_invalid_stack() { let script = Builder::default() .push_opcode(Opcode::OP_0NOTEQUAL) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_add() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_ADD) .into_script(); let result = Ok(true); let stack = vec![Num::from(5).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_add_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_ADD) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_sub() { let script = Builder::default() .push_num(3.into()) .push_num(2.into()) .push_opcode(Opcode::OP_SUB) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_sub_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_SUB) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_booland() { let script = Builder::default() .push_num(3.into()) .push_num(2.into()) .push_opcode(Opcode::OP_BOOLAND) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_booland_first() { let script = Builder::default() .push_num(2.into()) .push_num(0.into()) .push_opcode(Opcode::OP_BOOLAND) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_booland_second() { let script = Builder::default() .push_num(0.into()) .push_num(3.into()) .push_opcode(Opcode::OP_BOOLAND) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_booland_none() { let script = Builder::default() .push_num(0.into()) .push_num(0.into()) .push_opcode(Opcode::OP_BOOLAND) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_booland_invalid_stack() { let script = Builder::default() .push_num(0.into()) .push_opcode(Opcode::OP_BOOLAND) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_boolor() { let script = Builder::default() .push_num(3.into()) .push_num(2.into()) .push_opcode(Opcode::OP_BOOLOR) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_boolor_first() { let script = Builder::default() .push_num(2.into()) .push_num(0.into()) .push_opcode(Opcode::OP_BOOLOR) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_boolor_second() { let script = Builder::default() .push_num(0.into()) .push_num(3.into()) .push_opcode(Opcode::OP_BOOLOR) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_boolor_none() { let script = Builder::default() .push_num(0.into()) .push_num(0.into()) .push_opcode(Opcode::OP_BOOLOR) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_boolor_invalid_stack() { let script = Builder::default() .push_num(0.into()) .push_opcode(Opcode::OP_BOOLOR) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_numequal() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_NUMEQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_numequal_not() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_NUMEQUAL) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_numequal_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_NUMEQUAL) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_numequalverify() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_NUMEQUALVERIFY) .into_script(); let result = Ok(false); basic_test(&script, result, Stack::default()); } #[test] fn test_numequalverify_failed() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_NUMEQUALVERIFY) .into_script(); let result = Err(Error::NumEqualVerify); basic_test(&script, result, Stack::default()); } #[test] fn test_numequalverify_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_NUMEQUALVERIFY) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_numnotequal() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_NUMNOTEQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_numnotequal_not() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_NUMNOTEQUAL) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_numnotequal_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_NUMNOTEQUAL) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_lessthan() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_LESSTHAN) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_lessthan_not() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_LESSTHAN) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_lessthan_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_LESSTHAN) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_greaterthan() { let script = Builder::default() .push_num(3.into()) .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHAN) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_greaterthan_not() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHAN) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_greaterthan_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHAN) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_lessthanorequal() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_LESSTHANOREQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_lessthanorequal_equal() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_LESSTHANOREQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_lessthanorequal_not() { let script = Builder::default() .push_num(2.into()) .push_num(1.into()) .push_opcode(Opcode::OP_LESSTHANOREQUAL) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_lessthanorequal_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_LESSTHANOREQUAL) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_greaterthanorequal() { let script = Builder::default() .push_num(3.into()) .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHANOREQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_greaterthanorequal_equal() { let script = Builder::default() .push_num(2.into()) .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHANOREQUAL) .into_script(); let result = Ok(true); let stack = vec![Num::from(1).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_greaterthanorequal_not() { let script = Builder::default() .push_num(1.into()) .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHANOREQUAL) .into_script(); let result = Ok(false); let stack = vec![Num::from(0).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_greaterthanorequal_invalid_stack() { let script = Builder::default() .push_num(2.into()) .push_opcode(Opcode::OP_GREATERTHANOREQUAL) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_min() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_MIN) .into_script(); let result = Ok(true); let stack = vec![Num::from(2).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_min_second() { let script = Builder::default() .push_num(4.into()) .push_num(3.into()) .push_opcode(Opcode::OP_MIN) .into_script(); let result = Ok(true); let stack = vec![Num::from(3).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_min_invalid_stack() { let script = Builder::default() .push_num(4.into()) .push_opcode(Opcode::OP_MIN) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_max() { let script = Builder::default() .push_num(2.into()) .push_num(3.into()) .push_opcode(Opcode::OP_MAX) .into_script(); let result = Ok(true); let stack = vec![Num::from(3).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_max_second() { let script = Builder::default() .push_num(4.into()) .push_num(3.into()) .push_opcode(Opcode::OP_MAX) .into_script(); let result = Ok(true); let stack = vec![Num::from(4).to_bytes()].into(); basic_test(&script, result, stack); } #[test] fn test_max_invalid_stack() { let script = Builder::default() .push_num(4.into()) .push_opcode(Opcode::OP_MAX) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_within() { let script = Builder::default() .push_num(3.into()) .push_num(2.into()) .push_num(4.into()) .push_opcode(Opcode::OP_WITHIN) .into_script(); let result = Ok(true); let stack = vec![vec![1].into()].into(); basic_test(&script, result, stack); } #[test] fn test_within_not() { let script = Builder::default() .push_num(3.into()) .push_num(5.into()) .push_num(4.into()) .push_opcode(Opcode::OP_WITHIN) .into_script(); let result = Ok(false); let stack = vec![vec![0].into()].into(); basic_test(&script, result, stack); } #[test] fn test_within_invalid_stack() { let script = Builder::default() .push_num(5.into()) .push_num(4.into()) .push_opcode(Opcode::OP_WITHIN) .into_script(); let result = Err(Error::InvalidStackOperation); basic_test(&script, result, Stack::default()); } #[test] fn test_within_testnet_block_519() { let script = Builder::default() .push_num(1.into()) .push_num(0.into()) .push_num(1.into()) .push_opcode(Opcode::OP_WITHIN) .push_opcode(Opcode::OP_NOT) .into_script(); let result = Ok(true); let stack = vec![vec![1].into()].into(); basic_test(&script, result, stack); } // https://blockchain.info/rawtx/3f285f083de7c0acabd9f106a43ec42687ab0bebe2e6f0d529db696794540fea #[test] fn test_check_transaction_signature() { let tx: Transaction = "0100000001484d40d45b9ea0d652fca8258ab7caa42541eb52975857f96fb50cd732c8b481000000008a47304402202cb265bf10707bf49346c3515dd3d16fc454618c58ec0a0ff448a676c54ff71302206c6624d762a1fcef4618284ead8f08678ac05b13c84235f1654e6ad168233e8201410414e301b2328f17442c0b8310d787bf3d8a404cfbd0704f135b6ad4b2d3ee751310f981926e53a6e8c39bd7d3fefd576c543cce493cbac06388f2651d1aacbfcdffffffff0162640100000000001976a914c8e90996c7c6080ee06284600c684ed904d14c5c88ac00000000".into(); let signer: TransactionInputSigner = tx.into(); let checker = TransactionSignatureChecker { signer: signer, input_index: 0, }; let input: Script = "47304402202cb265bf10707bf49346c3515dd3d16fc454618c58ec0a0ff448a676c54ff71302206c6624d762a1fcef4618284ead8f08678ac05b13c84235f1654e6ad168233e8201410414e301b2328f17442c0b8310d787bf3d8a404cfbd0704f135b6ad4b2d3ee751310f981926e53a6e8c39bd7d3fefd576c543cce493cbac06388f2651d1aacbfcd".into(); let output: Script = "76a914df3bd30160e6c6145baaf2c88a8844c13a00d1d588ac".into(); let flags = VerificationFlags::default() .verify_p2sh(true); assert_eq!(verify_script(&input, &output, &flags, &checker), Ok(())); } // https://blockchain.info/rawtx/02b082113e35d5386285094c2829e7e2963fa0b5369fb7f4b79c4c90877dcd3d #[test] fn test_check_transaction_multisig() { let tx: Transaction = "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".into(); let signer: TransactionInputSigner = tx.into(); let checker = TransactionSignatureChecker { signer: signer, input_index: 0, }; let input: Script = "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".into(); let output: Script = "a9141a8b0026343166625c7475f01e48b5ede8c0252e87".into(); let flags = VerificationFlags::default() .verify_p2sh(true); assert_eq!(verify_script(&input, &output, &flags, &checker), Ok(())); } // https://blockchain.info/en/tx/12b5633bad1f9c167d523ad1aa1947b2732a865bf5414eab2f9e5ae5d5c191ba?show_adv=true #[test] fn test_transaction_with_high_s_signature() { let tx: Transaction = "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".into(); let signer: TransactionInputSigner = tx.into(); let checker = TransactionSignatureChecker { signer: signer, input_index: 0, }; let input: Script = "483045022052ffc1929a2d8bd365c6a2a4e3421711b4b1e1b8781698ca9075807b4227abcb0221009984107ddb9e3813782b095d0d84361ed4c76e5edaf6561d252ae162c2341cfb01".into(); let output: Script = "410411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3ac".into(); let flags = VerificationFlags::default() .verify_p2sh(true); assert_eq!(verify_script(&input, &output, &flags, &checker), Ok(())); } // https://blockchain.info/rawtx/fb0a1d8d34fa5537e461ac384bac761125e1bfa7fec286fa72511240fa66864d #[test] fn test_transaction_from_124276() { let tx: Transaction = "01000000012316aac445c13ff31af5f3d1e2cebcada83e54ba10d15e01f49ec28bddc285aa000000008e4b3048022200002b83d59c1d23c08efd82ee0662fec23309c3adbcbd1f0b8695378db4b14e736602220000334a96676e58b1bb01784cb7c556dd8ce1c220171904da22e18fe1e7d1510db5014104d0fe07ff74c9ef5b00fed1104fad43ecf72dbab9e60733e4f56eacf24b20cf3b8cd945bcabcc73ba0158bf9ce769d43e94bd58c5c7e331a188922b3fe9ca1f5affffffff01c0c62d00000000001976a9147a2a3b481ca80c4ba7939c54d9278e50189d94f988ac00000000".into(); let signer: TransactionInputSigner = tx.into(); let checker = TransactionSignatureChecker { signer: signer, input_index: 0, }; let input: Script = "4b3048022200002b83d59c1d23c08efd82ee0662fec23309c3adbcbd1f0b8695378db4b14e736602220000334a96676e58b1bb01784cb7c556dd8ce1c220171904da22e18fe1e7d1510db5014104d0fe07ff74c9ef5b00fed1104fad43ecf72dbab9e60733e4f56eacf24b20cf3b8cd945bcabcc73ba0158bf9ce769d43e94bd58c5c7e331a188922b3fe9ca1f5a".into(); let output: Script = "76a9147a2a3b481ca80c4ba7939c54d9278e50189d94f988ac".into(); let flags = VerificationFlags::default() .verify_p2sh(true); assert_eq!(verify_script(&input, &output, &flags, &checker), Ok(())); } // https://blockchain.info/rawtx/eb3b82c0884e3efa6d8b0be55b4915eb20be124c9766245bcc7f34fdac32bccb #[test] fn test_transaction_bip65() { let tx: Transaction = "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".into(); let signer: TransactionInputSigner = tx.into(); let checker = TransactionSignatureChecker { signer: signer, input_index: 1, }; let input: Script = "004730440220276d6dad3defa37b5f81add3992d510d2f44a317fd85e04f93a1e2daea64660202200f862a0da684249322ceb8ed842fb8c859c0cb94c81e1c5308b4868157a428ee01ab51210232abdc893e7f0631364d7fd01cb33d24da45329a00357b3a7886211ab414d55a51ae".into(); let output: Script = "142a9bc5447d664c1d0141392a842d23dba45c4f13b175".into(); let flags = VerificationFlags::default() .verify_p2sh(true); assert_eq!(verify_script(&input, &output, &flags, &checker), Ok(())); let flags = VerificationFlags::default() .verify_p2sh(true) .verify_clocktimeverify(true); assert_eq!(verify_script(&input, &output, &flags, &checker), Err(Error::NumberOverflow)); } // https://blockchain.info/rawtx/54fabd73f1d20c980a0686bf0035078e07f69c58437e4d586fb29aa0bee9814f #[test] fn test_arithmetic_correct_arguments_order() { let tx: Transaction = "01000000010c0e314bd7bb14721b3cfd8e487cd6866173354f87ca2cf4d13c8d3feb4301a6000000004a483045022100d92e4b61452d91a473a43cde4b469a472467c0ba0cbd5ebba0834e4f4762810402204802b76b7783db57ac1f61d2992799810e173e91055938750815b6d8a675902e014fffffffff0140548900000000001976a914a86e8ee2a05a44613904e18132e49b2448adc4e688ac00000000".into(); let signer: TransactionInputSigner = tx.into(); let checker = TransactionSignatureChecker { signer: signer, input_index: 0, }; let input: Script = "483045022100d92e4b61452d91a473a43cde4b469a472467c0ba0cbd5ebba0834e4f4762810402204802b76b7783db57ac1f61d2992799810e173e91055938750815b6d8a675902e014f".into(); let output: Script = "76009f69905160a56b210378d430274f8c5ec1321338151e9f27f4c676a008bdf8638d07c0b6be9ab35c71ad6c".into(); let flags = VerificationFlags::default(); assert_eq!(verify_script(&input, &output, &flags, &checker), Ok(())); } #[test] fn test_invalid_opcode_in_dead_execution_path_b83() { let script = Builder::default() .push_opcode(Opcode::OP_0) .push_opcode(Opcode::OP_IF) .push_invalid_opcode() .push_opcode(Opcode::OP_ELSE) .push_opcode(Opcode::OP_1) .push_opcode(Opcode::OP_ENDIF) .into_script(); let result = Ok(true); basic_test(&script, result, vec![vec![1].into()].into()); } #[test] fn test_skipping_sequencetimeverify() { let script = Builder::default() .push_opcode(Opcode::OP_1) .push_opcode(Opcode::OP_NOP1) .push_opcode(Opcode::OP_CHECKLOCKTIMEVERIFY) .push_opcode(Opcode::OP_CHECKSEQUENCEVERIFY) .push_opcode(Opcode::OP_NOP4) .push_opcode(Opcode::OP_NOP5) .push_opcode(Opcode::OP_NOP6) .push_opcode(Opcode::OP_NOP7) .push_opcode(Opcode::OP_NOP8) .push_opcode(Opcode::OP_NOP9) .push_opcode(Opcode::OP_NOP10) .push_opcode(Opcode::OP_1) .push_opcode(Opcode::OP_EQUAL) .into_script(); let result = Ok(true); basic_test(&script, result, vec![vec![1].into()].into()); } }