def ssh_key_gen(length=2048, type='rsa', password=None, username='jumpserver', hostname=None):
"""Generate user ssh private and public key
Use paramiko RSAKey generate it.
:return private key str and public key str
"""
if hostname is None:
hostname = os.uname()[1]
f = StringIO()
try:
if type == 'rsa':
private_key_obj = paramiko.RSAKey.generate(length)
elif type == 'dsa':
private_key_obj = paramiko.DSSKey.generate(length)
else:
raise IOError('SSH private key must be `rsa` or `dsa`')
private_key_obj.write_private_key(f, password=password)
private_key = f.getvalue()
public_key = ssh_pubkey_gen(private_key_obj, username=username, hostname=hostname)
return private_key, public_key
except IOError:
raise IOError('These is error when generate ssh key.')
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