enc.py

It is an experimental testing for python M2Crypto module. M2Crypto is not well document. User may no

#!/usr/bin/env python

from M2Crypto import RSA, EVP, Rand
import time,sys

def encrypt(pubfn, msgfn, outfn):
    print 'encrypt (%s, %s, %s)' % (pubfn,msgfn,outfn)
    pub = RSA.load_pub_key(pubfn)
    fd = open(msgfn,'rb')
    msg = fd.read()
    padding = RSA.pkcs1_oaep_padding
    ctxt = pub.public_encrypt(msg, padding)
    fd.close()
    fo = open(outfn, 'wb')
    fo.write(ctxt)
    fo.close()
    print 'done'

if __name__=='__main__':
    from optparse import OptionParser
    parser = OptionParser(usage='enc [-k] [-o] msg', version='enc 1.0')
    parser.add_option('-k','--pub',dest='pubkey', help='public key',default='DevicePublicKey.pem')
    parser.add_option('-o','--out',dest='output',help='output file',default='ToDevEnc.dat')
    (options,args) = parser.parse_args()
    pubfn = options.pubkey
    outfn = options.output
    msgfn = args[0]
    encrypt(pubfn,msgfn,outfn)