Mercurial > dropbear
annotate test/test_dropbearconvert.py @ 1918:863f31b4cf3c
Document supported formats for dropbearconvert
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 30 Mar 2022 12:03:50 +0800 |
| parents | ced53051e200 |
| children |
| rev | line source |
|---|---|
| 1909 | 1 import subprocess |
| 2 import tempfile | |
| 3 | |
| 4 import pytest | |
| 5 | |
| 6 keytypes = [ | |
| 7 "rsa", "rsa-4096", | |
| 8 "ed25519", | |
| 9 "ecdsa", "ecdsa-256", "ecdsa-384", "ecdsa-521", | |
| 10 "dss", | |
| 11 ] | |
| 12 | |
| 13 def parse_keytype(kt): | |
| 14 if '-' in kt: | |
| 15 return kt.split('-') | |
| 16 else: | |
| 17 return (kt, None) | |
| 18 | |
| 19 @pytest.mark.parametrize("keytype", keytypes) | |
| 20 @pytest.mark.parametrize("keyformat", [None, "PEM"]) | |
| 21 def test_from_openssh(request, tmp_path, keytype, keyformat): | |
| 22 """ | |
| 23 Convert OpenSSH to Dropbear format, | |
| 24 PEM and OpenSSH internal | |
| 25 """ | |
| 26 opt = request.config.option | |
| 27 kt, keybits = parse_keytype(keytype) | |
| 28 | |
| 29 if kt == 'dss' and keyformat is None: | |
|
1911
ced53051e200
Add ecdsa OpenSSH format for dropbearconvert
Matt Johnston <matt@ucc.asn.au>
parents:
1909
diff
changeset
|
30 pytest.skip("dss doesn't support openssh format") |
| 1909 | 31 |
| 32 os_kt = kt | |
| 33 if os_kt == 'dss': | |
| 34 # OpenSSH calls it 'dsa', Dropbear calls it 'dss' | |
| 35 os_kt = 'dsa' | |
| 36 | |
| 37 os_key = tmp_path / 'oskey1' | |
| 38 db_key = tmp_path / 'dbkey1' | |
| 39 | |
| 40 # Generate an OpenSSH key | |
| 41 args = [ | |
| 42 opt.ssh_keygen, | |
| 43 '-f', os_key, | |
| 44 '-t', os_kt, | |
| 45 '-N', '', # no password | |
| 46 ] | |
| 47 if keybits is not None: | |
| 48 args += ['-b', keybits] | |
| 49 if keyformat: | |
| 50 args += ['-m', keyformat] | |
| 51 p = subprocess.run(args, check=True) | |
| 52 | |
| 53 # Convert to dropbear format | |
| 54 args = [ | |
| 55 opt.dropbearconvert, | |
| 56 'openssh', 'dropbear', | |
| 57 os_key, db_key, | |
| 58 ] | |
| 59 p = subprocess.run(args, check=True) | |
| 60 | |
| 61 # Compare pubkeys | |
| 62 args = [ | |
| 63 opt.dropbearkey, | |
| 64 '-f', db_key, | |
| 65 '-y' | |
| 66 ] | |
| 67 p = subprocess.run(args, check=True, stdout=subprocess.PIPE, text=True) | |
| 68 db_pubkey = p.stdout.splitlines()[1].strip() | |
| 69 os_pubkey = os_key.with_suffix('.pub').open().read().strip() | |
| 70 # we compare the whole key including comment since it currently matches | |
| 71 assert db_pubkey == os_pubkey | |
| 72 | |
| 73 @pytest.mark.parametrize("keytype", keytypes) | |
| 74 def test_roundtrip(request, tmp_path, keytype): | |
| 75 """ | |
| 76 Dropbear's private key format is deterministic so | |
| 77 we can compare round trip conversion. (OpenSSH's | |
| 78 format has more variable comments and other fields). | |
| 79 """ | |
| 80 opt = request.config.option | |
| 81 kt, keybits = parse_keytype(keytype) | |
| 82 | |
| 83 os_key = tmp_path / 'oskey1' | |
| 84 db_key1 = tmp_path / 'dbkey1' | |
| 85 db_key2 = tmp_path / 'dbkey2' | |
| 86 | |
| 87 # generate a key | |
| 88 args = [ | |
| 89 opt.dropbearkey, | |
| 90 '-t', kt, | |
| 91 '-f', db_key1, | |
| 92 ] | |
| 93 if keybits is not None: | |
| 94 args += ['-s', keybits] | |
| 95 p = subprocess.run(args, check=True) | |
| 96 | |
| 97 # convert to openssh | |
| 98 args = [ | |
| 99 opt.dropbearconvert, | |
| 100 'dropbear', 'openssh', | |
| 101 db_key1, os_key, | |
| 102 ] | |
| 103 p = subprocess.run(args, check=True) | |
| 104 | |
| 105 # Check ssh-keygen can read it | |
| 106 args = [ | |
| 107 opt.ssh_keygen, | |
| 108 '-f', os_key, | |
| 109 '-y', | |
| 110 ] | |
| 111 p = subprocess.run(args, check=True, text=True, stdout=subprocess.PIPE) | |
| 112 os_pubkey = p.stdout.strip() | |
| 113 | |
| 114 # Compare public keys | |
| 115 args = [ | |
| 116 opt.dropbearkey, | |
| 117 '-f', db_key1, | |
| 118 '-y', | |
| 119 ] | |
| 120 p = subprocess.run(args, check=True, text=True, stdout=subprocess.PIPE) | |
| 121 db_pubkey = p.stdout.splitlines()[1].strip() | |
| 122 # comment may differ | |
| 123 db_pubkey = db_pubkey.split(' ')[:2] | |
| 124 os_pubkey = os_pubkey.split(' ')[:2] | |
| 125 assert db_pubkey == os_pubkey | |
| 126 | |
| 127 # convert back to dropbear | |
| 128 args = [ | |
| 129 opt.dropbearconvert, | |
| 130 'openssh', 'dropbear', | |
| 131 os_key, db_key2, | |
| 132 ] | |
| 133 p = subprocess.run(args, check=True) | |
| 134 # check the round trip is identical | |
| 135 assert db_key1.open('rb').read() == db_key2.open('rb').read() |