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fix scp repo url parsing for ip v6 addrs, fixes #6526 

added a negative lookahead/lookbehind to make sure an ipv6 addr
(enclosed in square brackets) does not get badly matched by the
regex part intended for hostnames and ipv4 addrs only.

the other part of that regex which is actually intended to match
ipv6 addrs only matches if they are enclosed in square brackets.

also added tests for ssh and scp style repo URLs with ipv6 addrs
in brackets.

also: made regex more readable, putting these 2 cases on separate lines.
This commit is contained in:
Thomas Waldmann 2022-04-03 16:49:28 +02:00
parent 22fc6d1bdd
commit f24979bc09
2 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/borg/helpers/parseformat.py
View File

@ -356,7 +356,11 @@ class Location:
scp_re = re.compile(r"""
(
""" + optional_user_re + r""" # user@ (optional)
(?P<host>([^:/]+|\[[0-9a-fA-F:.]+\])): # host: (don't match / or [ipv6] in host to disambiguate from file:)
(?P<host>( # host can be ipv6 addr in brackets or something else
(?!\[)[^:/]+(?<!\]) # host: hostname, not containing : or /, also not ipv6: not in brackets
|
\[[0-9a-fA-F:.]+\]) # host: ipv6 addr in brackets
):
)? # user@host: part is optional
""" + scp_path_re + optional_archive_re, re.VERBOSE) # path with optional archive

6
src/borg/testsuite/helpers.py
View File

@ -100,6 +100,10 @@ class TestLocationWithoutEnv:
assert repr(Location('ssh://user@[2001:db8::192.0.2.1]/some/path')) == \
"Location(proto='ssh', user='user', host='2001:db8::192.0.2.1', port=None, path='/some/path', archive=None)"
assert Location('ssh://user@[2001:db8::192.0.2.1]/some/path').to_key_filename() == keys_dir + '2001_db8__192_0_2_1__some_path'
assert repr(Location('ssh://user@[2a02:0001:0002:0003:0004:0005:0006:0007]/some/path')) == \
"Location(proto='ssh', user='user', host='2a02:0001:0002:0003:0004:0005:0006:0007', port=None, path='/some/path', archive=None)"
assert repr(Location('ssh://user@[2a02:0001:0002:0003:0004:0005:0006:0007]:1234/some/path')) == \
"Location(proto='ssh', user='user', host='2a02:0001:0002:0003:0004:0005:0006:0007', port=1234, path='/some/path', archive=None)"
def test_file(self, monkeypatch, keys_dir):
monkeypatch.delenv('BORG_REPO', raising=False)
@ -132,6 +136,8 @@ class TestLocationWithoutEnv:
assert repr(Location('user@[2001:db8::192.0.2.1]:/some/path')) == \
"Location(proto='ssh', user='user', host='2001:db8::192.0.2.1', port=None, path='/some/path', archive=None)"
assert Location('user@[2001:db8::192.0.2.1]:/some/path').to_key_filename() == keys_dir + '2001_db8__192_0_2_1__some_path'
assert repr(Location('user@[2a02:0001:0002:0003:0004:0005:0006:0007]:/some/path')) == \
"Location(proto='ssh', user='user', host='2a02:0001:0002:0003:0004:0005:0006:0007', port=None, path='/some/path', archive=None)"
def test_smb(self, monkeypatch, keys_dir):
monkeypatch.delenv('BORG_REPO', raising=False)