Subject: [PATCH] clone/fetch: anonymize URLs in the reflog

From: "Johannes Schindelin via GitGitGadget" <[email-masked]>
Date: Mon, 01 Jun 2020 19:20:02 +0000

From: Johannes Schindelin <[email-masked]>

Even if we strongly discourage putting credentials into the URLs passed
via the command-line, there _is_ support for that, and users _do_ do
that.

Let's scrub them before writing them to the reflog.

Signed-off-by: Johannes Schindelin <[email-masked]>
---
    Anonymize URLs in the reflog
    
    This came up in an internal audit, but we do not consider this to be a
    big deal: the reflog is local and not really shared with anybody.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-797%2Fdscho%2Fanonymize-clone-reflog-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-797/dscho/anonymize-clone-reflog-v1
Pull-Request: https://github.com/git/git/pull/797

 builtin/clone.c            | 10 ++++++----
 builtin/fetch.c            |  9 +++++++--
 t/t5541-http-push-smart.sh | 15 +++++++++++++++
 3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/builtin/clone.c b/builtin/clone.c
index 1ad26f4d8c8..5fe637a6702 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -938,7 +938,7 @@ static int path_exists(const char *path)
 int cmd_clone(int argc, const char **argv, const char *prefix)
 {
 	int is_bundle = 0, is_local;
-	const char *repo_name, *repo, *work_tree, *git_dir;
+	const char *repo_name, *repo, *display_repo, *work_tree, *git_dir;
 	char *path, *dir;
 	int dest_exists;
 	const struct ref *refs, *remote_head;
@@ -993,11 +993,13 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	path = get_repo_path(repo_name, &is_bundle);
 	if (path)
-		repo = absolute_pathdup(repo_name);
+		display_repo = repo = absolute_pathdup(repo_name);
 	else if (!strchr(repo_name, ':'))
 		die(_("repository '%s' does not exist"), repo_name);
-	else
+	else {
 		repo = repo_name;
+		display_repo = transport_anonymize_url(repo);
+	}
 
 	/* no need to be strict, transport_set_option() will validate it again */
 	if (option_depth && atoi(option_depth) < 1)
@@ -1014,7 +1016,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		die(_("destination path '%s' already exists and is not "
 			"an empty directory."), dir);
 
-	strbuf_addf(&reflog_msg, "clone: from %s", repo);
+	strbuf_addf(&reflog_msg, "clone: from %s", display_repo);
 
 	if (option_bare)
 		work_tree = NULL;
diff --git a/builtin/fetch.c b/builtin/fetch.c
index bf6bab80fab..d58b7572114 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -1765,8 +1765,13 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 
 	/* Record the command line for the reflog */
 	strbuf_addstr(&default_rla, "fetch");
-	for (i = 1; i < argc; i++)
-		strbuf_addf(&default_rla, " %s", argv[i]);
+	for (i = 1; i < argc; i++) {
+		/* This handles non-URLs gracefully */
+		char *anon = transport_anonymize_url(argv[i]);
+
+		strbuf_addf(&default_rla, " %s", anon);
+		free(anon);
+	}
 
 	fetch_config_from_gitmodules(&submodule_fetch_jobs_config,
 				     &recurse_submodules);
diff --git a/t/t5541-http-push-smart.sh b/t/t5541-http-push-smart.sh
index 23be8ce92d6..2d60381a5e7 100755
--- a/t/t5541-http-push-smart.sh
+++ b/t/t5541-http-push-smart.sh
@@ -456,6 +456,21 @@ test_expect_success 'push status output scrubs password' '
 	grep "^To $HTTPD_URL/smart/test_repo.git" status
 '
 
+test_expect_success 'clone/fetch scrubs password from reflogs' '
+	cd "$ROOT_PATH" &&
+	git clone "$HTTPD_URL_USER_PASS/smart/test_repo.git" \
+		reflog-test &&
+	cd reflog-test &&
+	test_commit prepare-for-force-fetch &&
+	git switch -c away &&
+	git fetch "$HTTPD_URL_USER_PASS/smart/test_repo.git" \
+		+master:master &&
+	# should have been scrubbed down to vanilla URL
+	git log -g master >reflog &&
+	grep "$HTTPD_URL" reflog &&
+	! grep "$HTTPD_URL_USER_PASS" reflog
+'
+
 test_expect_success 'colorize errors/hints' '
 	cd "$ROOT_PATH"/test_repo_clone &&
 	test_must_fail git -c color.transport=always -c color.advice=always \

base-commit: af6b65d45ef179ed52087e80cb089f6b2349f4ec
-- 
gitgitgadget