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| 1 | +# -*- coding: utf-8 -*- |
| 2 | +# |
| 3 | +# Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu> |
| 4 | +# |
| 5 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | +# you may not use this file except in compliance with the License. |
| 7 | +# You may obtain a copy of the License at |
| 8 | +# |
| 9 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +# |
| 11 | +# Unless required by applicable law or agreed to in writing, software |
| 12 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | +# See the License for the specific language governing permissions and |
| 15 | +# limitations under the License. |
| 16 | + |
| 17 | +'''Commandline scripts. |
| 18 | +
|
| 19 | +''' |
| 20 | + |
| 21 | +import sys |
| 22 | +from optparse import OptionParser |
| 23 | + |
| 24 | +import rsa |
| 25 | +import rsa.bigfile |
| 26 | + |
| 27 | +def keygen(): |
| 28 | + # Parse the CLI options |
| 29 | + parser = OptionParser(usage='usage: %prog [options] keysize', |
| 30 | + description='Generates a new RSA keypair of "keysize" bits.') |
| 31 | + |
| 32 | + parser.add_option('--pubout', type='string', |
| 33 | + help='Output filename for the public key. The public key is ' |
| 34 | + 'not saved if this option is not present. You can use ' |
| 35 | + 'pyrsa-priv2pub to create the public key file later.') |
| 36 | + |
| 37 | + parser.add_option('--privout', type='string', |
| 38 | + help='Output filename for the private key. The key is ' |
| 39 | + 'written to stdout if this option is not present.') |
| 40 | + |
| 41 | + parser.add_option('--form', |
| 42 | + help='key format of the private and public keys - default PEM', |
| 43 | + choices=('PEM', 'DER'), default='PEM') |
| 44 | + |
| 45 | + (cli, cli_args) = parser.parse_args(sys.argv[1:]) |
| 46 | + |
| 47 | + if len(cli_args) != 1: |
| 48 | + parser.print_help() |
| 49 | + raise SystemExit(1) |
| 50 | + |
| 51 | + try: |
| 52 | + keysize = int(cli_args[0]) |
| 53 | + except ValueError: |
| 54 | + parser.print_help() |
| 55 | + print >>sys.stderr, 'Not a valid number: %s' % cli_args[0] |
| 56 | + raise SystemExit(1) |
| 57 | + |
| 58 | + print >>sys.stderr, 'Generating %i-bit key' % keysize |
| 59 | + (pub_key, priv_key) = rsa.newkeys(keysize) |
| 60 | + |
| 61 | + |
| 62 | + # Save public key |
| 63 | + if cli.pubout: |
| 64 | + print >>sys.stderr, 'Writing public key to %s' % cli.pubout |
| 65 | + data = pub_key.save_pkcs1(format=cli.form) |
| 66 | + with open(cli.pubout, 'w') as outfile: |
| 67 | + outfile.write(data) |
| 68 | + |
| 69 | + # Save private key |
| 70 | + data = priv_key.save_pkcs1(format=cli.form) |
| 71 | + |
| 72 | + if cli.privout: |
| 73 | + print >>sys.stderr, 'Writing private key to %s' % cli.privout |
| 74 | + with open(cli.privout, 'w') as outfile: |
| 75 | + outfile.write(data) |
| 76 | + else: |
| 77 | + print >>sys.stderr, 'Writing private key to stdout' |
| 78 | + sys.stdout.write(data) |
| 79 | + |
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