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authorJonathan Nieder <jrnieder@gmail.com>2020-04-18 20:54:57 -0700
committerJonathan Nieder <jrnieder@gmail.com>2020-04-19 16:10:58 -0700
commite7fab62b736cca3416660636e46f0be8386a5030 (patch)
treed44b7bee236853dcc7f66a29340df9f4746f1b11
parentc44088ecc4b0722636e0a305f9608d3047197282 (diff)
downloadgit-e7fab62b736cca3416660636e46f0be8386a5030.tar.gz
credential: treat URL with empty scheme as invalid
Until "credential: refuse to operate when missing host or protocol", Git's credential handling code interpreted URLs with empty scheme to mean "give me credentials matching this host for any protocol". Luckily libcurl does not recognize such URLs (it tries to look for a protocol named "" and fails). Just in case that changes, let's reject them within Git as well. This way, credential_from_url is guaranteed to always produce a "struct credential" with protocol and host set. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
-rw-r--r--credential.c5
-rwxr-xr-xt/t5550-http-fetch-dumb.sh9
-rwxr-xr-xt/t7416-submodule-dash-url.sh32
3 files changed, 43 insertions, 3 deletions
diff --git a/credential.c b/credential.c
index aedb64574d..64a841eddc 100644
--- a/credential.c
+++ b/credential.c
@@ -357,7 +357,7 @@ int credential_from_url_gently(struct credential *c, const char *url,
* (3) proto://<user>:<pass>@<host>/...
*/
proto_end = strstr(url, "://");
- if (!proto_end) {
+ if (!proto_end || proto_end == url) {
if (!quiet)
warning(_("url has no scheme: %s"), url);
return -1;
@@ -382,8 +382,7 @@ int credential_from_url_gently(struct credential *c, const char *url,
host = at + 1;
}
- if (proto_end - url > 0)
- c->protocol = xmemdupz(url, proto_end - url);
+ c->protocol = xmemdupz(url, proto_end - url);
c->host = url_decode_mem(host, slash - host);
/* Trim leading and trailing slashes from path */
while (*slash == '/')
diff --git a/t/t5550-http-fetch-dumb.sh b/t/t5550-http-fetch-dumb.sh
index 517202e477..86f6eeaf71 100755
--- a/t/t5550-http-fetch-dumb.sh
+++ b/t/t5550-http-fetch-dumb.sh
@@ -314,6 +314,15 @@ test_expect_success 'remote-http complains cleanly about malformed urls' '
test_i18ngrep "url has no scheme" stderr
'
+# NEEDSWORK: Writing commands to git-remote-curl can race against the latter
+# erroring out, producing SIGPIPE. Remove "ok=sigpipe" once transport-helper has
+# learned to handle early remote helper failures more cleanly.
+test_expect_success 'remote-http complains cleanly about empty scheme' '
+ test_must_fail ok=sigpipe git ls-remote \
+ http::${HTTPD_URL#http}/dumb/repo.git 2>stderr &&
+ test_i18ngrep "url has no scheme" stderr
+'
+
test_expect_success 'redirects can be forbidden/allowed' '
test_must_fail git -c http.followRedirects=false \
clone $HTTPD_URL/dumb-redir/repo.git dumb-redir &&
diff --git a/t/t7416-submodule-dash-url.sh b/t/t7416-submodule-dash-url.sh
index 249dc3d1d4..9309040373 100755
--- a/t/t7416-submodule-dash-url.sh
+++ b/t/t7416-submodule-dash-url.sh
@@ -92,6 +92,38 @@ test_expect_success 'fsck rejects relative URL resolving to missing scheme' '
grep gitmodulesUrl err
'
+test_expect_success 'fsck rejects empty URL scheme' '
+ git checkout --orphan empty-scheme &&
+ cat >.gitmodules <<-\EOF &&
+ [submodule "foo"]
+ url = http::://one.example.com/foo.git
+ EOF
+ git add .gitmodules &&
+ test_tick &&
+ git commit -m "gitmodules with empty URL scheme" &&
+ test_when_finished "rm -rf dst" &&
+ git init --bare dst &&
+ git -C dst config transfer.fsckObjects true &&
+ test_must_fail git push dst HEAD 2>err &&
+ grep gitmodulesUrl err
+'
+
+test_expect_success 'fsck rejects relative URL resolving to empty scheme' '
+ git checkout --orphan relative-empty-scheme &&
+ cat >.gitmodules <<-\EOF &&
+ [submodule "foo"]
+ url = ../../../:://one.example.com/foo.git
+ EOF
+ git add .gitmodules &&
+ test_tick &&
+ git commit -m "relative gitmodules URL resolving to empty scheme" &&
+ test_when_finished "rm -rf dst" &&
+ git init --bare dst &&
+ git -C dst config transfer.fsckObjects true &&
+ test_must_fail git push dst HEAD 2>err &&
+ grep gitmodulesUrl err
+'
+
test_expect_success 'fsck permits embedded newline with unrecognized scheme' '
git checkout --orphan newscheme &&
cat >.gitmodules <<-\EOF &&