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warning C4244: '=': conversion from 'int' to 'unsigned short', possible
loss of data
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Add ALPN support for schannel. This allows cURL to negotiate
HTTP/2.0 connections when built with schannel.
Closes #724
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Regression from commit 7a8e861a5 as highlighted in the msys autobuilds.
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schannel.c:1125:5: warning: missing initializer for field 'dwMinorVersion'
of 'OSVERSIONINFOEX' [-Wmissing-field-initializers
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New tool option --ssl-no-revoke.
New value CURLSSLOPT_NO_REVOKE for CURLOPT_SSL_OPTIONS.
Currently this option applies only to WinSSL where we have automatic
certificate revocation checking by default. According to the
ssl-compared chart there are other backends that have automatic checking
(NSS, wolfSSL and DarwinSSL) so we could possibly accommodate them at
some later point.
Bug: https://github.com/bagder/curl/issues/264
Reported-by: zenden2k <zenden2k@gmail.com>
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This commit is several drafts squashed together. The changes from each
draft are noted below. If any changes are similar and possibly
contradictory the change in the latest draft takes precedence.
Bug: https://github.com/bagder/curl/issues/244
Reported-by: Chris Araman
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%% Draft 1
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- return 0 if len == 0. that will have to be documented.
- continue on and process the caches regardless of raw recv
- if decrypted data will be returned then set the error code to CURLE_OK
and return its count
- if decrypted data will not be returned and the connection has closed
(eg nread == 0) then return 0 and CURLE_OK
- if decrypted data will not be returned and the connection *hasn't*
closed then set the error code to CURLE_AGAIN --only if an error code
isn't already set-- and return -1
- narrow the Win2k workaround to only Win2k
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%% Draft 2
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- Trying out a change in flow to handle corner cases.
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%% Draft 3
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- Back out the lazier decryption change made in draft2.
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%% Draft 4
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- Some formatting and branching changes
- Decrypt all encrypted cached data when len == 0
- Save connection closed state
- Change special Win2k check to use connection closed state
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%% Draft 5
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- Default to CURLE_AGAIN in cleanup if an error code wasn't set and the
connection isn't closed.
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%% Draft 6
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- Save the last error only if it is an unrecoverable error.
Prior to this I saved the last error state in all cases; unfortunately
the logic to cover that in all cases would lead to some muddle and I'm
concerned that could then lead to a bug in the future so I've replaced
it by only recording an unrecoverable error and that state will persist.
- Do not recurse on renegotiation.
Instead we'll continue on to process any trailing encrypted data
received during the renegotiation only.
- Move the err checks in cleanup after the check for decrypted data.
In either case decrypted data is always returned but I think it's easier
to understand when those err checks come after the decrypted data check.
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%% Draft 7
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- Regardless of len value go directly to cleanup if there is an
unrecoverable error or a close_notify was already received. Prior to
this change we only acknowledged those two states if len != 0.
- Fix a bug in connection closed behavior: Set the error state in the
cleanup, because we don't know for sure it's an error until that time.
- (Related to above) In the case the connection is closed go "greedy"
with the decryption to make sure all remaining encrypted data has been
decrypted even if it is not needed at that time by the caller. This is
necessary because we can only tell if the connection closed gracefully
(close_notify) once all encrypted data has been decrypted.
- Do not renegotiate when an unrecoverable error is pending.
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%% Draft 8
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- Don't show 'server closed the connection' info message twice.
- Show an info message if server closed abruptly (missing close_notify).
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Some servers will request a client certificate, but not require one.
This change allows libcurl to connect to such servers when using
schannel as its ssl/tls backend. When a server requests a client
certificate, libcurl will now continue the handshake without one,
rather than terminating the handshake. The server can then decide
if that is acceptable or not. Prior to this change, libcurl would
terminate the handshake, reporting a SEC_I_INCOMPLETE_CREDENTIALS
error.
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https://github.com/bagder/curl/issues/244
Commit 145c263 changed the behavior when Curl_read_plain returns
CURLE_AGAIN. We now handle CURLE_AGAIN and SEC_I_CONTEXT_EXPIRED
correctly.
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Commit: https://github.com/bagder/curl/commit/926cb9f
Reported-by: Ray Satiro
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Bug born in changes made several days ago 9a91e80.
Bug: http://curl.haxx.se/mail/lib-2015-04/0199.html
Reported-by: Brian Chrisman
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Reported-by: Brian Chrisman
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white space changes only
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No need to use _MPRINTF_REPLACE internally.
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Removed the curl_ prefix from the schannel source files as discussed
with Marc and Daniel at FOSDEM.
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