From 0808ed83f9cf312abe229d0956f0b0132a79962d Mon Sep 17 00:00:00 2001 From: Nick Mathewson Date: Fri, 15 Aug 2014 08:30:44 -0400 Subject: [PATCH 1/3] Restore functionality for CookieAuthFileGroupReadable. When we merged the cookieauthfile creation logic in 33c3e60a37, we accidentally took out this feature. Fixes bug 12864, bugfix on 0.2.5.1-alpha. Also adds an ExtORPortCookieAuthFileGroupReadable, since there's no reason not to. --- changes/bug12864 | 7 +++++++ doc/tor.1.txt | 7 +++++++ src/or/config.c | 11 ++++++++++- src/or/config.h | 2 +- src/or/control.c | 1 + src/or/ext_orport.c | 1 + src/or/or.h | 2 ++ 7 files changed, 29 insertions(+), 2 deletions(-) create mode 100644 changes/bug12864 diff --git a/changes/bug12864 b/changes/bug12864 new file mode 100644 index 000000000..79e751f42 --- /dev/null +++ b/changes/bug12864 @@ -0,0 +1,7 @@ + o Minor bugfixes: + - Restore the functionality of CookieAuthFileGroupReadable. Fixes bug + 12864; bugfix on 0.2.5.1-alpha. + + o Minor features: + - Add an ExtORPortCookieAuthFileGroupReadable option to make the + cookie file for the ExtORPort g+r by default. diff --git a/doc/tor.1.txt b/doc/tor.1.txt index 93d302eb9..a85bc3480 100644 --- a/doc/tor.1.txt +++ b/doc/tor.1.txt @@ -224,6 +224,13 @@ GENERAL OPTIONS for the Extended ORPort's cookie file -- the cookie file is needed for pluggable transports to communicate through the Extended ORPort. +[[ExtORPortCookieAuthFileGroupReadable]] **ExtORPortCookieAuthFileGroupReadable** **0**|**1**:: + If this option is set to 0, don't allow the filesystem group to read the + Extende OR Port cookie file. If the option is set to 1, make the cookie + file readable by the default GID. [Making the file readable by other + groups is not yet implemented; let us know if you need this for some + reason.] (Default: 0) + [[ConnLimit]] **ConnLimit** __NUM__:: The minimum number of file descriptors that must be available to the Tor process before it will start. Tor will ask the OS for as many file diff --git a/src/or/config.c b/src/or/config.c index 2661ce3b7..20fde3bd2 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -238,6 +238,7 @@ static config_var_t option_vars_[] = { V(ExtendAllowPrivateAddresses, BOOL, "0"), VPORT(ExtORPort, LINELIST, NULL), V(ExtORPortCookieAuthFile, STRING, NULL), + V(ExtORPortCookieAuthFileGroupReadable, BOOL, "0"), V(ExtraInfoStatistics, BOOL, "1"), V(FallbackDir, LINELIST, NULL), @@ -6828,7 +6829,7 @@ config_maybe_load_geoip_files_(const or_options_t *options, * cookie_is_set_out to True. */ int init_cookie_authentication(const char *fname, const char *header, - int cookie_len, + int cookie_len, int group_readable, uint8_t **cookie_out, int *cookie_is_set_out) { char cookie_file_str_len = strlen(header) + cookie_len; @@ -6861,6 +6862,14 @@ init_cookie_authentication(const char *fname, const char *header, goto done; } +#ifndef _WIN32 + if (group_readable) { + if (chmod(fname, 0640)) { + log_warn(LD_FS,"Unable to make %s group-readable.", escaped(fname)); + } + } +#endif + /* Success! */ log_info(LD_GENERAL, "Generated auth cookie file in '%s'.", escaped(fname)); *cookie_is_set_out = 1; diff --git a/src/or/config.h b/src/or/config.h index bf386134b..8a1919c2e 100644 --- a/src/or/config.h +++ b/src/or/config.h @@ -97,7 +97,7 @@ uint32_t get_effective_bwburst(const or_options_t *options); char *get_transport_bindaddr_from_config(const char *transport); int init_cookie_authentication(const char *fname, const char *header, - int cookie_len, + int cookie_len, int group_readable, uint8_t **cookie_out, int *cookie_is_set_out); or_options_t *options_new(void); diff --git a/src/or/control.c b/src/or/control.c index 9285fc564..ec6350619 100644 --- a/src/or/control.c +++ b/src/or/control.c @@ -4666,6 +4666,7 @@ init_control_cookie_authentication(int enabled) fname = get_controller_cookie_file_name(); retval = init_cookie_authentication(fname, "", /* no header */ AUTHENTICATION_COOKIE_LEN, + get_options()->CookieAuthFileGroupReadable, &authentication_cookie, &authentication_cookie_is_set); tor_free(fname); diff --git a/src/or/ext_orport.c b/src/or/ext_orport.c index 0d28a9199..9b550ee90 100644 --- a/src/or/ext_orport.c +++ b/src/or/ext_orport.c @@ -143,6 +143,7 @@ init_ext_or_cookie_authentication(int is_enabled) fname = get_ext_or_auth_cookie_file_name(); retval = init_cookie_authentication(fname, EXT_OR_PORT_AUTH_COOKIE_HEADER, EXT_OR_PORT_AUTH_COOKIE_HEADER_LEN, + get_options()->ExtORPortCookieAuthFileGroupReadable, &ext_or_auth_cookie, &ext_or_auth_cookie_is_set); tor_free(fname); diff --git a/src/or/or.h b/src/or/or.h index 131bce3e1..0f1457f78 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -3801,6 +3801,8 @@ typedef struct { char *ExtORPortCookieAuthFile; /**< Filesystem location of Extended * ORPort authentication cookie. */ int CookieAuthFileGroupReadable; /**< Boolean: Is the CookieAuthFile g+r? */ + int ExtORPortCookieAuthFileGroupReadable; /**< Boolean: Is the + * ExtORPortCookieAuthFile g+r? */ int LeaveStreamsUnattached; /**< Boolean: Does Tor attach new streams to * circuits itself (0), or does it expect a controller * to cope? (1) */ From 0ee1be0c698fa330a2ee2e4f2818e2118f459517 Mon Sep 17 00:00:00 2001 From: Nick Mathewson Date: Fri, 15 Aug 2014 08:32:54 -0400 Subject: [PATCH 2/3] Documentation fix on arguments to CookieAuthFileGroupReadable We don't actually allow a group name, but the documentation implied that we did. --- doc/tor.1.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/tor.1.txt b/doc/tor.1.txt index a85bc3480..900e58800 100644 --- a/doc/tor.1.txt +++ b/doc/tor.1.txt @@ -319,7 +319,7 @@ GENERAL OPTIONS If set, this option overrides the default location and file name for Tor's cookie file. (See CookieAuthentication above.) -[[CookieAuthFileGroupReadable]] **CookieAuthFileGroupReadable** **0**|**1**|__Groupname__:: +[[CookieAuthFileGroupReadable]] **CookieAuthFileGroupReadable** **0**|**1**:: If this option is set to 0, don't allow the filesystem group to read the cookie file. If the option is set to 1, make the cookie file readable by the default GID. [Making the file readable by other groups is not yet From 112c984f9242699d273f3096d669eb1024d7f64b Mon Sep 17 00:00:00 2001 From: George Kadianakis Date: Fri, 15 Aug 2014 23:12:06 +0300 Subject: [PATCH 3/3] Some documentation fixes for #12864. --- doc/tor.1.txt | 2 +- src/or/config.c | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/doc/tor.1.txt b/doc/tor.1.txt index 900e58800..04d13fbfb 100644 --- a/doc/tor.1.txt +++ b/doc/tor.1.txt @@ -226,7 +226,7 @@ GENERAL OPTIONS [[ExtORPortCookieAuthFileGroupReadable]] **ExtORPortCookieAuthFileGroupReadable** **0**|**1**:: If this option is set to 0, don't allow the filesystem group to read the - Extende OR Port cookie file. If the option is set to 1, make the cookie + Extended OR Port cookie file. If the option is set to 1, make the cookie file readable by the default GID. [Making the file readable by other groups is not yet implemented; let us know if you need this for some reason.] (Default: 0) diff --git a/src/or/config.c b/src/or/config.c index 20fde3bd2..f53186a5f 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -6825,6 +6825,9 @@ config_maybe_load_geoip_files_(const or_options_t *options, * in cookie_out. * Then write it down to fname and prepend it with header. * + * If group_readable is set, set fname to be readable + * by the default GID. + * * If the whole procedure was successful, set * cookie_is_set_out to True. */ int