From b44d0118ac5074215ece7ae2bb86ad0713f70674 Mon Sep 17 00:00:00 2001 From: "brian m. carlson" Date: Mon, 27 Apr 2020 01:18:08 +0000 Subject: [PATCH] credential: fix matching URLs with multiple levels in path MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 46fd7b3900 ("credential: allow wildcard patterns when matching config", 2020-02-20) introduced support for matching credential helpers using urlmatch. In doing so, it introduced code to percent-encode the paths we get from the credential helper so that they could be effectively matched by the urlmatch code. Unfortunately, that code had a bug: it percent-encoded the slashes in the path, resulting in any URL path that contained multiple levels (i.e., a directory component) not matching. We are currently the only caller of the percent-encoding code and could simply change it not to encode slashes. However, we still want to encode slashes in the username component, so we need to have both behaviors available. So instead, let's add a flag to control encoding slashes, which is the behavior we want here, and use it when calling the code in this case. Add a test for credential helper URLs using multiple slashes in the path, which our test suite previously lacked, as well as one ensuring that we handle usernames with slashes gracefully. Since we're testing other percent-encoding handling, let's add one for non-ASCII UTF-8 characters as well. Reported-by: Ilya Tretyakov Signed-off-by: Carlo Marcelo Arenas Belón Signed-off-by: brian m. carlson Signed-off-by: Junio C Hamano --- credential.c | 4 ++-- strbuf.c | 8 +++++--- strbuf.h | 7 ++++++- t/t0300-credentials.sh | 45 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 58 insertions(+), 6 deletions(-) diff --git a/credential.c b/credential.c index 77dfde44e3..8348b6fb57 100644 --- a/credential.c +++ b/credential.c @@ -131,14 +131,14 @@ static void credential_format(struct credential *c, struct strbuf *out) return; strbuf_addf(out, "%s://", c->protocol); if (c->username && *c->username) { - strbuf_add_percentencode(out, c->username); + strbuf_add_percentencode(out, c->username, STRBUF_ENCODE_SLASH); strbuf_addch(out, '@'); } if (c->host) strbuf_addstr(out, c->host); if (c->path) { strbuf_addch(out, '/'); - strbuf_add_percentencode(out, c->path); + strbuf_add_percentencode(out, c->path, 0); } } diff --git a/strbuf.c b/strbuf.c index bb0065ccaf..51c83aae2d 100644 --- a/strbuf.c +++ b/strbuf.c @@ -479,15 +479,17 @@ void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src) } } -#define URL_UNSAFE_CHARS " <>\"%{}|\\^`:/?#[]@!$&'()*+,;=" +#define URL_UNSAFE_CHARS " <>\"%{}|\\^`:?#[]@!$&'()*+,;=" -void strbuf_add_percentencode(struct strbuf *dst, const char *src) +void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags) { size_t i, len = strlen(src); for (i = 0; i < len; i++) { unsigned char ch = src[i]; - if (ch <= 0x1F || ch >= 0x7F || strchr(URL_UNSAFE_CHARS, ch)) + if (ch <= 0x1F || ch >= 0x7F || + (ch == '/' && (flags & STRBUF_ENCODE_SLASH)) || + strchr(URL_UNSAFE_CHARS, ch)) strbuf_addf(dst, "%%%02X", (unsigned char)ch); else strbuf_addch(dst, ch); diff --git a/strbuf.h b/strbuf.h index 2504ae4ecb..5d20942c04 100644 --- a/strbuf.h +++ b/strbuf.h @@ -366,11 +366,16 @@ size_t strbuf_expand_dict_cb(struct strbuf *sb, */ void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src); +#define STRBUF_ENCODE_SLASH 1 + /** * Append the contents of a string to a strbuf, percent-encoding any characters * that are needed to be encoded for a URL. + * + * If STRBUF_ENCODE_SLASH is set in flags, percent-encode slashes. Otherwise, + * slashes are not percent-encoded. */ -void strbuf_add_percentencode(struct strbuf *dst, const char *src); +void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags); /** * Append the given byte size as a human-readable string (i.e. 12.23 KiB, diff --git a/t/t0300-credentials.sh b/t/t0300-credentials.sh index 39f097ea9e..08799b4125 100755 --- a/t/t0300-credentials.sh +++ b/t/t0300-credentials.sh @@ -291,6 +291,51 @@ test_expect_success 'match percent-encoded values' ' EOF ' +test_expect_success 'match percent-encoded UTF-8 values in path' ' + test_config credential.https://example.com.useHttpPath true && + test_config credential.https://example.com/perú.git.helper "$HELPER" && + check fill <<-\EOF + url=https://example.com/per%C3%BA.git + -- + protocol=https + host=example.com + path=perú.git + username=foo + password=bar + -- + EOF +' + +test_expect_success 'match percent-encoded values in username' ' + test_config credential.https://user%2fname@example.com/foo/bar.git.helper "$HELPER" && + check fill <<-\EOF + url=https://user%2fname@example.com/foo/bar.git + -- + protocol=https + host=example.com + username=foo + password=bar + -- + EOF +' + +test_expect_success 'fetch with multiple path components' ' + test_unconfig credential.helper && + test_config credential.https://example.com/foo/repo.git.helper "verbatim foo bar" && + check fill <<-\EOF + url=https://example.com/foo/repo.git + -- + protocol=https + host=example.com + username=foo + password=bar + -- + verbatim: get + verbatim: protocol=https + verbatim: host=example.com + EOF +' + test_expect_success 'pull username from config' ' test_config credential.https://example.com.username foo && check fill <<-\EOF