mirror of
https://github.com/fail0verflow/hbc.git
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58 lines
1.0 KiB
Python
58 lines
1.0 KiB
Python
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#!/usr/bin/env python
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import sys
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import pywii as wii
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if len(sys.argv) != 3:
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print "Usage: %s keyfile.[priv|pub] infile"%sys.argv[0]
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sys.exit(1)
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if sys.argv[1] == "-":
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k = sys.stdin.read()
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else:
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k = open(sys.argv[1],"rb").read()
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if len(k) not in (30,60):
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print "Failed to read key"
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sys.exit(2)
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if len(k) == 30:
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print "Key is a private key, generating public key..."
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q = wii.ec.priv_to_pub(k)
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else:
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q = k
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print "Public key:"
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pq = q.encode('hex')
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print "X =",pq[:30]
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print " ",pq[30:60]
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print "Y =",pq[60:90]
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print " ",pq[90:]
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print
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indata = open(sys.argv[2],"rb").read()
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if len(indata) < 64 or indata[:4] != "SIG0":
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print "Invalid header"
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sys.exit(3)
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r = indata[4:34]
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s = indata[34:64]
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sha = wii.SHA.new(indata[64:]).digest()
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print "SHA1: %s"%sha.encode('hex')
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print
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print "Signature:"
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print "R =",r[:15].encode('hex')
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print " ",r[15:].encode('hex')
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print "S =",s[:15].encode('hex')
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print " ",s[15:].encode('hex')
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print
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if wii.ec.check_ecdsa(q,r,s,sha):
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print "Signature is VALID"
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else:
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print "Signature is INVALID"
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sys.exit(4)
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