summaryrefslogtreecommitdiff
path: root/http.c
AgeCommit message (Collapse)Author
2021-02-22http: allow custom index-pack argsJonathan Tan
Currently, when fetching, packfiles referenced by URIs are run through index-pack without any arguments other than --stdin and --keep, no matter what arguments are used for the packfile that is inline in the fetch response. As a preparation for ensuring that all packs (whether inline or not) use the same index-pack arguments, teach the http subsystem to allow custom index-pack arguments. http-fetch has been updated to use the new API. For now, it passes --keep alone instead of --keep with a process ID, but this is only temporary because http-fetch itself will be taught to accept index-pack parameters (instead of using a hardcoded constant) in a subsequent commit. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: fix indentation in renamed callsJeff King
Code which split an argv_array call across multiple lines, like: argv_array_pushl(&args, "one argument", "another argument", "and more", NULL); was recently mechanically renamed to use strvec, which results in mis-matched indentation like: strvec_pushl(&args, "one argument", "another argument", "and more", NULL); Let's fix these up to align the arguments with the opening paren. I did this manually by sifting through the results of: git jump grep 'strvec_.*,$' and liberally applying my editor's auto-format. Most of the changes are of the form shown above, though I also normalized a few that had originally used a single-tab indentation (rather than our usual style of aligning with the open paren). I also rewrapped a couple of obvious cases (e.g., where previously too-long lines became short enough to fit on one), but I wasn't aggressive about it. In cases broken to three or more lines, the grouping of arguments is sometimes meaningful, and it wasn't worth my time or reviewer time to ponder each case individually. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: convert more callers away from argv_array nameJeff King
We eventually want to drop the argv_array name and just use strvec consistently. There's no particular reason we have to do it all at once, or care about interactions between converted and unconverted bits. Because of our preprocessor compat layer, the names are interchangeable to the compiler (so even a definition and declaration using different names is OK). This patch converts remaining files from the first half of the alphabet, to keep the diff to a manageable size. The conversion was done purely mechanically with: git ls-files '*.c' '*.h' | xargs perl -i -pe ' s/ARGV_ARRAY/STRVEC/g; s/argv_array/strvec/g; ' and then selectively staging files with "git add '[abcdefghjkl]*'". We'll deal with any indentation/style fallouts separately. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-25Merge branch 'jt/cdn-offload'Junio C Hamano
The "fetch/clone" protocol has been updated to allow the server to instruct the clients to grab pre-packaged packfile(s) in addition to the packed object data coming over the wire. * jt/cdn-offload: upload-pack: fix a sparse '0 as NULL pointer' warning upload-pack: send part of packfile response as uri fetch-pack: support more than one pack lockfile upload-pack: refactor reading of pack-objects out Documentation: add Packfile URIs design doc Documentation: order protocol v2 sections http-fetch: support fetching packfiles by URL http-fetch: refactor into function http: refactor finish_http_pack_request() http: use --stdin when indexing dumb HTTP pack
2020-06-11http-fetch: support fetching packfiles by URLJonathan Tan
Teach http-fetch the ability to download packfiles directly, given a URL, and to verify them. The http_pack_request suite has been augmented with a function that takes a URL directly. With this function, the hash is only used to determine the name of the temporary file. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11http: refactor finish_http_pack_request()Jonathan Tan
finish_http_pack_request() does multiple tasks, including some housekeeping on a struct packed_git - (1) closing its index, (2) removing it from a list, and (3) installing it. These concerns are independent of fetching a pack through HTTP: they are there only because (1) the calling code opens the pack's index before deciding to fetch it, (2) the calling code maintains a list of packfiles that can be fetched, and (3) the calling code fetches it in order to make use of its objects in the same process. In preparation for a subsequent commit, which adds a feature that does not need any of this housekeeping, remove (1), (2), and (3) from finish_http_pack_request(). (2) and (3) are now done by a helper function, and (1) is the responsibility of the caller (in this patch, done closer to the point where the pack index is opened). Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11http: use --stdin when indexing dumb HTTP packJonathan Tan
When Git fetches a pack using dumb HTTP, (among other things) it invokes index-pack on a ".pack.temp" packfile, specifying the filename as an argument. A future commit will require the aforementioned invocation of index-pack to also generate a "keep" file. To use this, we either have to use index-pack's naming convention (because --keep requires the pack's filename to end with ".pack") or to pass the pack through stdin. Of the two, it is simpler to pass the pack through stdin. Thus, teach http to pass --stdin to index-pack. As a bonus, the code is now simpler. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05http: redact all cookies, teach GIT_TRACE_REDACT=0Jonathan Tan
In trace output (when GIT_TRACE_CURL is true), redact the values of all HTTP cookies by default. Now that auth headers (since the implementation of GIT_TRACE_CURL in 74c682d3c6 ("http.c: implement the GIT_TRACE_CURL environment variable", 2016-05-24)) and cookie values (since this commit) are redacted by default in these traces, also allow the user to inhibit these redactions through an environment variable. Since values of all cookies are now redacted by default, GIT_REDACT_COOKIES (which previously allowed users to select individual cookies to redact) now has no effect. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-11http, imap-send: stop using CURLOPT_VERBOSEJonathan Tan
Whenever GIT_CURL_VERBOSE is set, teach Git to behave as if GIT_TRACE_CURL=1 and GIT_TRACE_CURL_NO_DATA=1 is set, instead of setting CURLOPT_VERBOSE. This is to prevent inadvertent revelation of sensitive data. In particular, GIT_CURL_VERBOSE redacts neither the "Authorization" header nor any cookies specified by GIT_REDACT_COOKIES. Unifying the tracing mechanism also has the future benefit that any improvements to the tracing mechanism will benefit both users of GIT_CURL_VERBOSE and GIT_TRACE_CURL, and we do not need to remember to implement any improvement twice. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-20Sync with 2.26.2Junio C Hamano
2020-04-19Git 2.26.2v2.26.2Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.25.4v2.25.4Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.24.3v2.24.3Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.22.4v2.22.4Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.21.3v2.21.3Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.20.4v2.20.4Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.19.5v2.19.5Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19Git 2.18.4v2.18.4Jonathan Nieder
This merges up the security fix from v2.17.5. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-04-19credential: parse URL without host as empty host, not unsetJeff King
We may feed a URL like "cert:///path/to/cert.pem" into the credential machinery to get the key for a client-side certificate. That credential has no hostname field, which is about to be disallowed (to avoid confusion with protocols where a helper _would_ expect a hostname). This means as of the next patch, credential helpers won't work for unlocking certs. Let's fix that by doing two things: - when we parse a url with an empty host, set the host field to the empty string (asking only to match stored entries with an empty host) rather than NULL (asking to match _any_ host). - when we build a cert:// credential by hand, similarly assign an empty string It's the latter that is more likely to impact real users in practice, since it's what's used for http connections. But we don't have good infrastructure to test it. The url-parsing version will help anybody using git-credential in a script, and is easy to test. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2020-03-25Merge branch 'js/https-proxy-config'Junio C Hamano
A handful of options to configure SSL when talking to proxies have been added. * js/https-proxy-config: http: add environment variable support for HTTPS proxies http: add client cert support for HTTPS proxies
2020-03-05http: add environment variable support for HTTPS proxiesJorge Lopez Silva
Add 4 environment variables that can be used to configure the proxy cert, proxy ssl key, the proxy cert password protected flag, and the CA info for the proxy. Documentation for the options was also updated. Signed-off-by: Jorge Lopez Silva <jalopezsilva@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-05http: add client cert support for HTTPS proxiesJorge Lopez Silva
Git supports performing connections to HTTPS proxies, but we don't support doing mutual authentication with them (through TLS). Add the necessary options to be able to send a client certificate to the HTTPS proxy. A client certificate can provide an alternative way of authentication instead of using 'ProxyAuthorization' or other more common methods of authentication. Libcurl supports this functionality already, so changes are somewhat minimal. The feature is guarded by the first available libcurl version that supports these options. 4 configuration options are added and documented, cert, key, cert password protected and CA info. The CA info should be used to specify a different CA path to validate the HTTPS proxy cert. Signed-off-by: Jorge Lopez Silva <jalopezsilva@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-10strbuf: add and use strbuf_insertstr()René Scharfe
Add a function for inserting a C string into a strbuf. Use it throughout the source to get rid of magic string length constants and explicit strlen() calls. Like strbuf_addstr(), implement it as an inline function to avoid the implicit strlen() calls to cause runtime overhead. Helped-by: Taylor Blau <me@ttaylorr.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-12-01Merge branch 'cb/curl-use-xmalloc'Junio C Hamano
HTTP transport had possible allocator/deallocator mismatch, which has been corrected. * cb/curl-use-xmalloc: remote-curl: unbreak http.extraHeader with custom allocators
2019-11-07remote-curl: unbreak http.extraHeader with custom allocatorsJohannes Schindelin
In 93b980e58f5 (http: use xmalloc with cURL, 2019-08-15), we started to ask cURL to use `xmalloc()`, and if compiled with nedmalloc, that means implicitly a different allocator than the system one. Which means that all of cURL's allocations and releases now _need_ to use that allocator. However, the `http_options()` function used `slist_append()` to add any configured extra HTTP header(s) _before_ asking cURL to use `xmalloc()`, and `http_cleanup()` would release them _afterwards_, i.e. in the presence of custom allocators, cURL would attempt to use the wrong allocator to release the memory. A naïve attempt at fixing this would move the call to `curl_global_init()` _before_ the config is parsed (i.e. before that call to `slist_append()`). However, that does not work, as we _also_ parse the config setting `http.sslbackend` and if found, call `curl_global_sslset()` which *must* be called before `curl_global_init()`, for details see: https://curl.haxx.se/libcurl/c/curl_global_sslset.html So let's instead make the config parsing entirely independent from cURL's data structures. Incidentally, this deletes two more lines than it introduces, which is nice. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-09-30Merge branch 'mh/http-urlmatch-cleanup'Junio C Hamano
Leakfix. * mh/http-urlmatch-cleanup: http: don't leak urlmatch_config.vars
2019-08-26http: don't leak urlmatch_config.varsMike Hommey
Signed-off-by: Mike Hommey <mh@glandium.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-28strbuf: give URL-encoding API a char predicate fnMatthew DeVore
Allow callers to specify exactly what characters need to be URL-encoded and which do not. This new API will be taken advantage of in a patch later in this set. Helped-by: Jeff King <peff@peff.net> Signed-off-by: Matthew DeVore <matvore@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-05-08Make fread/fwrite-like functions in http.c more like fread/fwrite.Mike Hommey
The fread/fwrite-like functions in http.c, namely fread_buffer, fwrite_buffer, fwrite_null, fwrite_sha1_file all return the multiplication of the size and number of items they are being given. Practically speaking, it doesn't matter, because in all contexts where those functions are used, size is 1. But those functions being similar to fread and fwrite (the curl API is designed around being able to use fread and fwrite directly), it might be preferable to make them behave like fread and fwrite, which, from the fread/fwrite manual page, is: On success, fread() and fwrite() return the number of items read or written. This number equals the number of bytes transferred only when size is 1. If an error occurs, or the end of the file is reached, the return value is a short item count (or zero). Signed-off-by: Mike Hommey <mh@glandium.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-25Merge branch 'bc/hash-transition-16'Junio C Hamano
Conversion from unsigned char[20] to struct object_id continues. * bc/hash-transition-16: (35 commits) gitweb: make hash size independent Git.pm: make hash size independent read-cache: read data in a hash-independent way dir: make untracked cache extension hash size independent builtin/difftool: use parse_oid_hex refspec: make hash size independent archive: convert struct archiver_args to object_id builtin/get-tar-commit-id: make hash size independent get-tar-commit-id: parse comment record hash: add a function to lookup hash algorithm by length remote-curl: make hash size independent http: replace sha1_to_hex http: compute hash of downloaded objects using the_hash_algo http: replace hard-coded constant with the_hash_algo http-walker: replace sha1_to_hex http-push: remove remaining uses of sha1_to_hex http-backend: allow 64-character hex names http-push: convert to use the_hash_algo builtin/pull: make hash-size independent builtin/am: make hash size independent ...
2019-04-25Merge branch 'jk/server-info-rabbit-hole'Junio C Hamano
Code clean-up around a much-less-important-than-it-used-to-be update_server_info() funtion. * jk/server-info-rabbit-hole: update_info_refs(): drop unused force parameter server-info: drop objdirlen pointer arithmetic server-info: drop nr_alloc struct member server-info: use strbuf to read old info/packs file server-info: simplify cleanup in parse_pack_def() server-info: fix blind pointer arithmetic http: simplify parsing of remote objects/info/packs packfile: fix pack basename computation midx: check both pack and index names for containment t5319: drop useless --buffer from cat-file t5319: fix bogus cat-file argument pack-revindex: open index if necessary packfile.h: drop extern from function declarations
2019-04-16http: simplify parsing of remote objects/info/packsJeff King
We can use skip_prefix() and parse_oid_hex() to continuously increment our pointer, rather than dealing with magic numbers. This also fixes a few small shortcomings: - if we see a line with the right prefix, suffix, and length, i.e. matching /P pack-.{40}.pack\n/, we'll interpret the middle part as hex without checking if it could be parsed. This could lead to us looking at uninitialized garbage in the hash array. In practice this means we'll just make a garbage request to the server which will fail, though it's interesting that a malicious server could convince us to leak 40 bytes of uninitialized stack to them. - the current code is picky about seeing a newline at the end of file, but we can easily be more liberal Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-01http: replace sha1_to_hexbrian m. carlson
Since sha1_to_hex is limited to SHA-1, replace it with hash_to_hex. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-01http: compute hash of downloaded objects using the_hash_algobrian m. carlson
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-01http: replace hard-coded constant with the_hash_algobrian m. carlson
Replace a hard-coded 40 with a reference to the_hash_algo. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-01object-store: rename and expand packed_git's sha1 memberbrian m. carlson
This member is used to represent the pack checksum of the pack in question. Expand this member to be GIT_MAX_RAWSZ bytes in length so it works with longer hashes and rename it to be "hash" instead of "sha1". This transformation was made with a change to the definition and the following semantic patch: @@ struct packed_git *E1; @@ - E1->sha1 + E1->hash @@ struct packed_git E1; @@ - E1.sha1 + E1.hash Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-24http: factor out curl result code normalizationJeff King
We make some requests with CURLOPT_FAILONERROR and some without, and then handle_curl_result() normalizes any failures to a uniform CURLcode. There are some other code paths in the dumb-http walker which don't use handle_curl_result(); let's pull the normalization into its own function so it can be reused. Arguably those code paths would benefit from the rest of handle_curl_result(), notably the auth handling. But retro-fitting it now would be a lot of work, and in practice it doesn't matter too much (whatever authentication we needed to make the initial contact with the server is generally sufficient for the rest of the dumb-http requests). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-02-07Merge branch 'jk/loose-object-cache-oid'Junio C Hamano
Code clean-up. * jk/loose-object-cache-oid: prefer "hash mismatch" to "sha1 mismatch" sha1-file: avoid "sha1 file" for generic use in messages sha1-file: prefer "loose object file" to "sha1 file" in messages sha1-file: drop has_sha1_file() convert has_sha1_file() callers to has_object_file() sha1-file: convert pass-through functions to object_id sha1-file: modernize loose header/stream functions sha1-file: modernize loose object file functions http: use struct object_id instead of bare sha1 update comment references to sha1_object_info() sha1-file: fix outdated sha1 comment references
2019-01-29Merge branch 'ms/http-no-more-failonerror'Junio C Hamano
Debugging help for http transport. * ms/http-no-more-failonerror: test: test GIT_CURL_VERBOSE=1 shows an error remote-curl: unset CURLOPT_FAILONERROR remote-curl: define struct for CURLOPT_WRITEFUNCTION http: enable keep_error for HTTP requests http: support file handles for HTTP_KEEP_ERROR
2019-01-10http: enable keep_error for HTTP requestsMasaya Suzuki
curl stops parsing a response when it sees a bad HTTP status code and it has CURLOPT_FAILONERROR set. This prevents GIT_CURL_VERBOSE to show HTTP headers on error. keep_error is an option to receive the HTTP response body for those error responses. By enabling this option, curl will process the HTTP response headers, and they're shown if GIT_CURL_VERBOSE is set. Signed-off-by: Masaya Suzuki <masayasuzuki@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-10http: support file handles for HTTP_KEEP_ERRORMasaya Suzuki
HTTP_KEEP_ERROR makes it easy to debug HTTP transport errors. In order to make HTTP_KEEP_ERROR enabled for all requests, file handles need to be supported. Signed-off-by: Masaya Suzuki <masayasuzuki@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-08sha1-file: modernize loose object file functionsJeff King
The loose object access code in sha1-file.c is some of the oldest in Git, and could use some modernizing. It mostly uses "unsigned char *" for object ids, which these days should be "struct object_id". It also uses the term "sha1_file" in many functions, which is confusing. The term "loose_objects" is much better. It clearly distinguishes them from packed objects (which didn't even exist back when the name "sha1_file" came into being). And it also distinguishes it from the checksummed-file concept in csum-file.c (which until recently was actually called "struct sha1file"!). This patch converts the functions {open,close,map,stat}_sha1_file() into open_loose_object(), etc, and switches their sha1 arguments for object_id structs. Similarly, path functions like fill_sha1_path() become fill_loose_path() and use object_ids. The function sha1_loose_object_info() already says "loose", so we can just drop the "sha1" (and teach it to use object_id). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-08http: use struct object_id instead of bare sha1Jeff King
The dumb-http walker code still passes around and stores object ids as "unsigned char *sha1". Let's modernize it. There's probably still more work to be done to handle dumb-http fetches with a new, larger hash. But that can wait; this is enough that we can now convert some of the low-level object routines that we call into from here (and in fact, some of the "oid.hash" references added here will be further improved in the next patch). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-04Merge branch 'jk/loose-object-cache'Junio C Hamano
Code clean-up with optimization for the codepath that checks (non-)existence of loose objects. * jk/loose-object-cache: odb_load_loose_cache: fix strbuf leak fetch-pack: drop custom loose object cache sha1-file: use loose object cache for quick existence check object-store: provide helpers for loose_objects_cache sha1-file: use an object_directory for the main object dir handle alternates paths the same as the main object dir sha1_file_name(): overwrite buffer instead of appending rename "alternate_object_database" to "object_directory" submodule--helper: prefer strip_suffix() to ends_with() fsck: do not reuse child_process structs
2019-01-04Merge branch 'fc/http-version'Junio C Hamano
The "http.version" configuration variable can be used with recent enough cURL library to force the version of HTTP used to talk when fetching and pushing. * fc/http-version: http: add support selecting http version
2018-11-29i18n: fix small typosJean-Noël Avila
Translating the new strings introduced for v2.20 showed some typos. Signed-off-by: Jean-Noël Avila <jn.avila@free.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-13sha1_file_name(): overwrite buffer instead of appendingJeff King
The sha1_file_name() function is used to generate the path to a loose object in the object directory. It doesn't make much sense for it to append, since the the path we write may be absolute (i.e., you cannot reliably build up a path with it). Because many callers use it with a static buffer, they have to strbuf_reset() manually before each call (and the other callers always use an empty buffer, so they don't care either way). Let's handle this automatically. Since we're changing the semantics, let's take the opportunity to give it a more hash-neutral name (which will also catch any callers from topics in flight). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-09http: add support selecting http versionForce Charlie
Usually we don't need to set libcurl to choose which version of the HTTP protocol to use to communicate with a server. But different versions of libcurl, the default value is not the same. CURL >= 7.62.0: CURL_HTTP_VERSION_2TLS CURL < 7.62: CURL_HTTP_VERSION_1_1 In order to give users the freedom to control the HTTP version, we need to add a setting to choose which HTTP version to use. Signed-off-by: Force Charlie <charlieio@outlook.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-02Merge branch 'jc/http-curlver-warnings'Junio C Hamano
Warning message fix. * jc/http-curlver-warnings: http: give curl version warnings consistently
2018-11-02Merge branch 'js/mingw-http-ssl'Junio C Hamano
On platforms with recent cURL library, http.sslBackend configuration variable can be used to choose a different SSL backend at runtime. The Windows port uses this mechanism to switch between OpenSSL and Secure Channel while talking over the HTTPS protocol. * js/mingw-http-ssl: http: when using Secure Channel, ignore sslCAInfo by default http: add support for disabling SSL revocation checks in cURL http: add support for selecting SSL backends at runtime