def from_line(cls, line):
"""
Parses the given line of text to find the names for the host,
the type of key, and the key data. The line is expected to be in the
format used by the openssh known_hosts file.
Lines are expected to not have leading or trailing whitespace.
We don't bother to check for comments or empty lines. All of
that should be taken care of before sending the line to us.
@param line: a line from an OpenSSH known_hosts file
@type line: str
"""
fields = line.split(' ')
if len(fields) < 3:
# Bad number of fields
return None
fields = fields[:3]
names, keytype, key = fields
names = names.split(',')
# Decide what kind of key we're looking at and create an object
# to hold it accordingly.
if keytype == 'ssh-rsa':
key = RSAKey(data=base64.decodestring(key))
elif keytype == 'ssh-dss':
key = DSSKey(data=base64.decodestring(key))
else:
return None
return cls(names, key)
def _parse_dsa_key(msg):
# See comment for _parse_rsa_key
key_msg = Message()
key_msg.add_string('ssh-dss')
key_msg.add_mpint(msg.get_mpint())
key_msg.add_mpint(msg.get_mpint())
key_msg.add_mpint(msg.get_mpint())
key_msg.add_mpint(msg.get_mpint())
key_msg.rewind()
return DSSKey(msg=key_msg)
def from_line(cls, line, lineno=None):
"""
Parses the given line of text to find the names for the host,
the type of key, and the key data. The line is expected to be in the
format used by the OpenSSH known_hosts file.
Lines are expected to not have leading or trailing whitespace.
We don't bother to check for comments or empty lines. All of
that should be taken care of before sending the line to us.
:param str line: a line from an OpenSSH known_hosts file
"""
log = get_logger("paramiko.hostkeys")
fields = line.split(" ")
if len(fields) < 3:
# Bad number of fields
msg = "Not enough fields found in known_hosts in line {} ({!r})"
log.info(msg.format(lineno, line))
return None
fields = fields[:3]
names, keytype, key = fields
names = names.split(",")
# Decide what kind of key we're looking at and create an object
# to hold it accordingly.
try:
key = b(key)
if keytype == "ssh-rsa":
key = RSAKey(data=decodebytes(key))
elif keytype == "ssh-dss":
key = DSSKey(data=decodebytes(key))
elif keytype in ECDSAKey.supported_key_format_identifiers():
key = ECDSAKey(data=decodebytes(key), validate_point=False)
elif keytype == "ssh-ed25519":
key = Ed25519Key(data=decodebytes(key))
elif keytype == "ssh-xmss":
key = XMSS(data=decodebytes(key))
else:
log.info("Unable to handle key of type {}".format(keytype))
return None
except binascii.Error as e:
raise InvalidHostKey(line, e)
return cls(names, key)
def str_to_key(key_str):
'''Gets a string with rsa/dsa private key and converts it to paramiko key
object. Returns RSAKey/DSSKey object if succeeded or None if error occured.'''
if 'BEGIN RSA' in key_str:
str_obj = StringIO(key_str)
try:
k = RSAKey(file_obj=str_obj)
return k
except:
return None
elif 'BEGIN DSA' in key_str:
str_obj = StringIO(key_str)
try:
k = DSSKey(file_obj=str_obj)
return k
except:
return None
else:
return None
def from_line(cls, line, lineno=None):
"""
Parses the given line of text to find the names for the host,
the type of key, and the key data. The line is expected to be in the
format used by the openssh known_hosts file.
Lines are expected to not have leading or trailing whitespace.
We don't bother to check for comments or empty lines. All of
that should be taken care of before sending the line to us.
@param line: a line from an OpenSSH known_hosts file
@type line: str
"""
log = get_logger('paramiko.hostkeys')
fields = line.split(' ')
if len(fields) < 3:
# Bad number of fields
log.info("Not enough fields found in known_hosts in line %s (%r)" %
(lineno, line))
return None
fields = fields[:3]
names, keytype, key = fields
names = names.split(',')
# Decide what kind of key we're looking at and create an object
# to hold it accordingly.
try:
key = b(key)
if keytype == 'ssh-rsa':
key = RSAKey(data=decodebytes(key))
elif keytype == 'ssh-dss':
key = DSSKey(data=decodebytes(key))
elif keytype == 'ecdsa-sha2-nistp256':
key = ECDSAKey(data=decodebytes(key))
else:
log.info("Unable to handle key of type %s" % (keytype, ))
return None
except binascii.Error:
raise InvalidHostKey(line, sys.exc_info()[1])
return cls(names, key)
