64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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from oslo_concurrency import processutils
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import paramiko
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import six
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from tempest.lib import exceptions as ex
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from sahara_tests.utils import tempfiles
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def to_paramiko_private_key(pkey):
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"""Convert private key (str) to paramiko-specific RSAKey object."""
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return paramiko.RSAKey(file_obj=six.StringIO(pkey))
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def generate_key_pair(key_length=2048):
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"""Create RSA key pair with specified number of bits in key.
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Returns tuple of private and public keys.
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"""
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with tempfiles.tempdir() as tmpdir:
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keyfile = os.path.join(tmpdir, 'tempkey')
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# The key is generated in the old PEM format, instead of the native
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# format of OpenSSH >=6.5, because paramiko does not support it:
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# https://github.com/paramiko/paramiko/issues/602
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args = [
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'ssh-keygen',
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'-q', # quiet
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'-N', '', # w/o passphrase
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'-m', 'PEM', # old PEM format
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'-t', 'rsa', # create key of rsa type
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'-f', keyfile, # filename of the key file
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'-C', 'Generated-by-Sahara' # key comment
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]
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if key_length is not None:
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args.extend(['-b', key_length])
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processutils.execute(*args)
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if not os.path.exists(keyfile):
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raise ex.TempestException("Private key file hasn't been created")
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with open(keyfile) as keyfile_fd:
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private_key = keyfile_fd.read()
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public_key_path = keyfile + '.pub'
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if not os.path.exists(public_key_path):
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raise ex.TempestException("Public key file hasn't been created")
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with open(public_key_path) as public_key_path_fd:
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public_key = public_key_path_fd.read()
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return private_key, public_key
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