hbc/pywii/pywii-tools/ecpriv2pub.py

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Python
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2016-11-23 06:35:12 +01:00
#!/usr/bin/env python
import sys
import pywii as wii
if len(sys.argv) not in (2,3):
print "Usage: %s keyfile.priv [keyfile.pub]"%sys.argv[0]
sys.exit(1)
if sys.argv[1] == "-":
k = sys.stdin.read()
else:
k = open(sys.argv[1],"rb").read()
if len(k) != 30:
print "Failed to read private key"
sys.exit(2)
print "Public key:"
q = wii.ec.priv_to_pub(k)
pq = q.encode('hex')
print "X =",pq[:30]
print " ",pq[30:60]
print "Y =",pq[60:90]
print " ",pq[90:]
if len(sys.argv) == 3:
fd = open(sys.argv[2],"wb")
fd.write(q)
fd.close()
print "Saved public key to %s"%sys.argv[2]