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urlapi: starting with a drive letter on win32 is not an abs url

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... and libcurl doesn't support any single-letter URL schemes (if there
even exist any) so it should be fairly risk-free.

Reported-by: Marcel Raad

Fixes #3070
Closes #3071
This commit is contained in:
Daniel Stenberg 2018-10-01 15:59:24 +02:00
parent c1c092c0b4
commit d9a2dc9aad
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GPG Key ID: 5CC908FDB71E12C2
1 changed files with 18 additions and 14 deletions
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32
lib/urlapi.c
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@ -35,6 +35,20 @@
#include "curl_memory.h"
#include "memdebug.h"
/* MSDOS/Windows style drive prefix, eg c: in c:foo */
#define STARTS_WITH_DRIVE_PREFIX(str) \
((('a' <= str[0] && str[0] <= 'z') || \
('A' <= str[0] && str[0] <= 'Z')) && \
(str[1] == ':'))
/* MSDOS/Windows style drive prefix, optionally with
* a '|' instead of ':', followed by a slash or NUL */
#define STARTS_WITH_URL_DRIVE_PREFIX(str) \
((('a' <= (str)[0] && (str)[0] <= 'z') || \
('A' <= (str)[0] && (str)[0] <= 'Z')) && \
((str)[1] == ':' || (str)[1] == '|') && \
((str)[2] == '/' || (str)[2] == '\\' || (str)[2] == 0))
/* Internal representation of CURLU. Point to URL-encoded strings. */
struct Curl_URL {
char *scheme;
@ -218,6 +232,10 @@ void Curl_strcpy_url(char *output, const char *url, bool relative)
bool Curl_is_absolute_url(const char *url, char *buf, size_t buflen)
{
size_t i;
#ifdef WIN32
if(STARTS_WITH_DRIVE_PREFIX(url))
return FALSE;
#endif
for(i = 0; i < buflen && url[i]; ++i) {
char s = url[i];
if(s == ':') {
@ -610,20 +628,6 @@ static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags)
hostname = &path[urllen + 1];
hostname[0] = 0;
/* MSDOS/Windows style drive prefix, eg c: in c:foo */
#define STARTS_WITH_DRIVE_PREFIX(str) \
((('a' <= str[0] && str[0] <= 'z') || \
('A' <= str[0] && str[0] <= 'Z')) && \
(str[1] == ':'))
/* MSDOS/Windows style drive prefix, optionally with
* a '|' instead of ':', followed by a slash or NUL */
#define STARTS_WITH_URL_DRIVE_PREFIX(str) \
((('a' <= (str)[0] && (str)[0] <= 'z') || \
('A' <= (str)[0] && (str)[0] <= 'Z')) && \
((str)[1] == ':' || (str)[1] == '|') && \
((str)[2] == '/' || (str)[2] == '\\' || (str)[2] == 0))
if(Curl_is_absolute_url(url, schemebuf, sizeof(schemebuf))) {
url_has_scheme = TRUE;
schemelen = strlen(schemebuf);