Topic: Custom Bitcoin Addresses? (Read 852 times)

verbose=False

#### On A's computer
pvk1=2142
key=EC_KEY(pvk1)
print 'Hidden pvk1: %d'%pvk1
print 'pbk1 X: ', key.pubkey.point.x()
print 'pbk1 Y: ', key.pubkey.point.y()
print

#### B receives X and Y and puts them in pbk2
pbk2=key.pubkey.point
pvk2=0
pattern='1BTC'
print 'Pattern: '+pattern
while True:
        pvk2+=1
        pbk2=pbk2.__add__(key.generator)
        if verbose:
                print 'Partial private key pvk2=%d'%pvk2
                print 'pbk2 X: ', pbk2.x()
                print 'pbk2 Y: ', pbk2.y()
                print 'pbk2   compressed addr: ', pbk2.get_addr(True)
                print 'pbk2 uncompressed addr: ', pbk2.get_addr(False)
                print
        if pbk2.get_addr(True)[:len(pattern)]==pattern:
                break
        if pbk2.get_addr(False)[:len(pattern)]==pattern:
                break

#### B sends pvk2 to A
finalpvk=pvk1+pvk2
print 'My hidden pvk1: %d'%pvk1
print 'Received pvk2:  %d'%pvk2
print 'Final pvk:      %d'%finalpvk

key=EC_KEY(finalpvk)
if key.pubkey.point.get_addr(True)[:len(pattern)]==pattern:
        print 'BitcoinAddress(pvk=%d, compressed=True)  ='%finalpvk, key.pubkey.point.get_addr(True)
elif key.pubkey.point.get_addr(False)[:len(pattern)]==pattern:
        print 'BitcoinAddress(pvk=%d, compressed=False) ='%finalpvk, key.pubkey.point.get_addr(False)
else:
        print "pvk2 doesn't work"