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sslutil: require TLS 1.1+ when supported...
sslutil: require TLS 1.1+ when supported Currently, Mercurial will use TLS 1.0 or newer when connecting to remote servers, selecting the highest TLS version supported by both peers. On older Pythons, only TLS 1.0 is available. On newer Pythons, TLS 1.1 and 1.2 should be available. Security professionals recommend avoiding TLS 1.0 if possible. PCI DSS 3.1 "strongly encourages" the use of TLS 1.2. Known attacks like BEAST and POODLE exist against TLS 1.0 (although mitigations are available and properly configured servers aren't vulnerable). I asked Eric Rescorla - Mozilla's resident crypto expert - whether Mercurial should drop support for TLS 1.0. His response was "if you can get away with it." Essentially, a number of servers on the Internet don't support TLS 1.1+. This is why web browsers continue to support TLS 1.0 despite desires from security experts. This patch changes Mercurial's default behavior on modern Python versions to require TLS 1.1+, thus avoiding known security issues with TLS 1.0 and making Mercurial more secure by default. Rather than drop TLS 1.0 support wholesale, we still allow TLS 1.0 to be used if configured. This is a compromise solution - ideally we'd disallow TLS 1.0. However, since we're not sure how many Mercurial servers don't support TLS 1.1+ and we're not sure how much user inconvenience this change will bring, I think it is prudent to ship an escape hatch that still allows usage of TLS 1.0. In the default case our users get better security. In the worst case, they are no worse off than before this patch. This patch has no effect when running on Python versions that don't support TLS 1.1+. As the added test shows, connecting to a server that doesn't support TLS 1.1+ will display a warning message with a link to our wiki, where we can guide people to configure their client to allow less secure connections.

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test-bundle-vs-outgoing.t
142 lines | 2.3 KiB | text/troff | Tads3Lexer
/ tests / test-bundle-vs-outgoing.t
this structure seems to tickle a bug in bundle's search for
changesets, so first we have to recreate it
o 8
|
| o 7
| |
| o 6
|/|
o | 5
| |
o | 4
| |
| o 3
| |
| o 2
|/
o 1
|
o 0
$ mkrev()
> {
> revno=$1
> echo "rev $revno"
> echo "rev $revno" > foo.txt
> hg -q ci -m"rev $revno"
> }
setup test repo1
$ hg init repo1
$ cd repo1
$ echo "rev 0" > foo.txt
$ hg ci -Am"rev 0"
adding foo.txt
$ mkrev 1
rev 1
first branch
$ mkrev 2
rev 2
$ mkrev 3
rev 3
back to rev 1 to create second branch
$ hg up -r1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ mkrev 4
rev 4
$ mkrev 5
rev 5
merge first branch to second branch
$ hg up -C -r5
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ HGMERGE=internal:local hg merge
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ echo "merge rev 5, rev 3" > foo.txt
$ hg ci -m"merge first branch to second branch"
one more commit following the merge
$ mkrev 7
rev 7
back to "second branch" to make another head
$ hg up -r5
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ mkrev 8
rev 8
the story so far
$ hg log -G --template "{rev}\n"
@ 8
|
| o 7
| |
| o 6
|/|
o | 5
| |
o | 4
| |
| o 3
| |
| o 2
|/
o 1
|
o 0
check that "hg outgoing" really does the right thing
sanity check of outgoing: expect revs 4 5 6 7 8
$ hg clone -r3 . ../repo2
adding changesets
adding manifests
adding file changes
added 4 changesets with 4 changes to 1 files
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
this should (and does) report 5 outgoing revisions: 4 5 6 7 8
$ hg outgoing --template "{rev}\n" ../repo2
comparing with ../repo2
searching for changes
4
5
6
7
8
test bundle (destination repo): expect 5 revisions
this should bundle the same 5 revisions that outgoing reported, but it
actually bundles 7
$ hg bundle foo.bundle ../repo2
searching for changes
5 changesets found
test bundle (base revision): expect 5 revisions
this should (and does) give exactly the same result as bundle
with a destination repo... i.e. it's wrong too
$ hg bundle --base 3 foo.bundle
5 changesets found
$ cd ..