def unparse_script(p):
r = []
for insn in p:
kind = insn[0]
if kind == KIND_PUSH:
_, data = insn
r.append(make_push_str(data))
elif kind == KIND_COND:
_, sense, sub0, sub1 = insn
if sense:
op = OP_IF
else:
op = OP_NOTIF
r.append(chr(op))
r.append(unparse_script(sub0))
if sub1:
r.append(chr(OP_ELSE))
r.append(unparse_script(sub1))
r.append(chr(OP_ENDIF))
elif kind == KIND_CHECK:
_, op, _ = insn
r.append(chr(op))
elif kind == KIND_OP:
_, op = insn
r.append(chr(op))
return ''.join(r)
def unparse_script (p):
r = []
for insn in p:
kind = insn[0]
if kind == KIND_PUSH:
_, data = insn
r.append (make_push_str (data))
elif kind == KIND_COND:
_, sense, sub0, sub1 = insn
if sense:
op = OP_IF
else:
op = OP_NOTIF
r.append (chr (op))
r.append (unparse_script (sub0))
if sub1:
r.append (chr (OP_ELSE))
r.append (unparse_script (sub1))
r.append (chr (OP_ENDIF))
elif kind == KIND_CHECK:
_, op, _ = insn
r.append (chr (op))
elif kind == KIND_OP:
_, op = insn
r.append (chr (op))
return ''.join (r)
def check_sig(self, s):
pub_key = self.pop()
sig = self.pop()
s0 = parse_script(s)
s1 = remove_codeseps(s0)
s2 = remove_sigs(s1, [sig]) # rare?
s3 = unparse_script(s2)
return self.check_one_sig(pub_key, sig, s3)
def check_sig (self, s):
pub_key = self.pop()
sig = self.pop()
s0 = parse_script (s)
s1 = remove_codeseps (s0)
s2 = remove_sigs (s1, [sig]) # rare?
s3 = unparse_script (s2)
return self.check_one_sig (pub_key, sig, s3)
def check_multi_sig(self, s):
npub = self.pop_int()
#print 'npub=', npub
pubs = [self.pop() for x in range(npub)]
nsig = self.pop_int()
#print 'nsig=', nsig
sigs = [self.pop() for x in range(nsig)]
s0 = parse_script(s)
s1 = remove_codeseps(s0)
s2 = remove_sigs(s1, sigs) # rare?
s3 = unparse_script(s2)
for sig in sigs:
nmatch = 0
#print 'checking sig...'
for pub in pubs:
if self.check_one_sig(pub, sig, s3):
nmatch += 1
if nmatch == 0:
#print 'sig matched no pubs'
return 0
return 1
def check_multi_sig (self, s):
npub = self.pop_int()
#print 'npub=', npub
pubs = [self.pop() for x in range (npub)]
nsig = self.pop_int()
#print 'nsig=', nsig
sigs = [self.pop() for x in range (nsig)]
s0 = parse_script (s)
s1 = remove_codeseps (s0)
s2 = remove_sigs (s1, sigs) # rare?
s3 = unparse_script (s2)
for sig in sigs:
nmatch = 0
#print 'checking sig...'
for pub in pubs:
if self.check_one_sig (pub, sig, s3):
nmatch += 1
if nmatch == 0:
#print 'sig matched no pubs'
return 0
return 1
