upstream/mercurial-mirror Files · tests/test-addremove-similar.t

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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        $ hg init rep; cd rep

        $ touch empty-file

        $ $PYTHON -c 'for x in range(10000): print(x)' > large-file

        $ hg addremove

        adding empty-file

        adding large-file

        $ hg commit -m A

        $ rm large-file empty-file

        $ $PYTHON -c 'for x in range(10,10000): print(x)' > another-file

        $ hg addremove -s50

        adding another-file

        removing empty-file

        removing large-file

        recording removal of large-file as rename to another-file (99% similar)

        $ hg commit -m B

      comparing two empty files caused ZeroDivisionError in the past

        $ hg update -C 0

        2 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ rm empty-file

        $ touch another-empty-file

        $ hg addremove -s50

        adding another-empty-file

        removing empty-file

        $ cd ..

        $ hg init rep2; cd rep2

        $ $PYTHON -c 'for x in range(10000): print(x)' > large-file

        $ $PYTHON -c 'for x in range(50): print(x)' > tiny-file

        $ hg addremove

        adding large-file

        adding tiny-file

        $ hg commit -m A

        $ $PYTHON -c 'for x in range(70): print(x)' > small-file

        $ rm tiny-file

        $ rm large-file

        $ hg addremove -s50

        removing large-file

        adding small-file

        removing tiny-file

        recording removal of tiny-file as rename to small-file (82% similar)

        $ hg commit -m B

      should all fail

        $ hg addremove -s foo

        abort: similarity must be a number

        [255]

        $ hg addremove -s -1

        abort: similarity must be between 0 and 100

        [255]

        $ hg addremove -s 1e6

        abort: similarity must be between 0 and 100

        [255]

        $ cd ..

      Issue1527: repeated addremove causes Abort

        $ hg init rep3; cd rep3

        $ mkdir d

        $ echo a > d/a

        $ hg add d/a

        $ hg commit -m 1

        $ mv d/a d/b

        $ hg addremove -s80

        removing d/a

        adding d/b

        recording removal of d/a as rename to d/b (100% similar) (glob)

        $ hg debugstate

        r   0          0 1970-01-01 00:00:00 d/a

        a   0         -1 unset               d/b

        copy: d/a -> d/b

        $ mv d/b c

      no copies found here (since the target isn't in d

        $ hg addremove -s80 d

        removing d/b (glob)

      copies here

        $ hg addremove -s80

        adding c

        recording removal of d/a as rename to c (100% similar) (glob)

        $ cd ..

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				$ hg init rep; cd rep

				$ touch empty-file
				$ $PYTHON -c 'for x in range(10000): print(x)' > large-file

				$ hg addremove
				adding empty-file
				adding large-file

				$ hg commit -m A

				$ rm large-file empty-file
				$ $PYTHON -c 'for x in range(10,10000): print(x)' > another-file

				$ hg addremove -s50
				adding another-file
				removing empty-file
				removing large-file
				recording removal of large-file as rename to another-file (99% similar)

				$ hg commit -m B

				comparing two empty files caused ZeroDivisionError in the past

				$ hg update -C 0
				2 files updated, 0 files merged, 1 files removed, 0 files unresolved
				$ rm empty-file
				$ touch another-empty-file
				$ hg addremove -s50
				adding another-empty-file
				removing empty-file

				$ cd ..

				$ hg init rep2; cd rep2

				$ $PYTHON -c 'for x in range(10000): print(x)' > large-file
				$ $PYTHON -c 'for x in range(50): print(x)' > tiny-file

				$ hg addremove
				adding large-file
				adding tiny-file

				$ hg commit -m A

				$ $PYTHON -c 'for x in range(70): print(x)' > small-file
				$ rm tiny-file
				$ rm large-file

				$ hg addremove -s50
				removing large-file
				adding small-file
				removing tiny-file
				recording removal of tiny-file as rename to small-file (82% similar)

				$ hg commit -m B

				should all fail

				$ hg addremove -s foo
				abort: similarity must be a number
				[255]
				$ hg addremove -s -1
				abort: similarity must be between 0 and 100
				[255]
				$ hg addremove -s 1e6
				abort: similarity must be between 0 and 100
				[255]

				$ cd ..

				Issue1527: repeated addremove causes Abort

				$ hg init rep3; cd rep3
				$ mkdir d
				$ echo a > d/a
				$ hg add d/a
				$ hg commit -m 1

				$ mv d/a d/b
				$ hg addremove -s80
				removing d/a
				adding d/b
				recording removal of d/a as rename to d/b (100% similar) (glob)
				$ hg debugstate
				r 0 0 1970-01-01 00:00:00 d/a
				a 0 -1 unset d/b
				copy: d/a -> d/b
				$ mv d/b c

				no copies found here (since the target isn't in d

				$ hg addremove -s80 d
				removing d/b (glob)

				copies here

				$ hg addremove -s80
				adding c
				recording removal of d/a as rename to c (100% similar) (glob)

				$ cd ..