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gpg: Add function to extract the mailbox.

Browse Source 
* g10/misc.c (has_invalid_email_chars, is_valid_mailbox)
(is_valid_user_id): Move to ...
* g10/mailbox.c: new file.
(string_has_ctrl_or_space, has_dotdot_after_at): New.
(has_invalid_email_chars): New.

* g10/t-mailbox.c: New.
* g10/Makefile.am (module_tests): Add t-mailbox.
(t_mailbox_SOURCES, t_mailbox_LDADD): New.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-02-24 17:43:57 +01:00
parent d790111801
commit 93fa3d5c17
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
5 changed files with 322 additions and 79 deletions
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5
g10/Makefile.am
View File

@ -83,6 +83,7 @@ common_source = \
textfilter.c \
progress.c \
misc.c \
mailbox.c \
rmd160.c rmd160.h \
options.h \
openfile.c \
@ -154,9 +155,11 @@ gpgv2_LDADD = $(LDADD) $(LIBGCRYPT_LIBS) \
gpgv2_LDFLAGS = $(extra_bin_ldflags)
t_common_ldadd =
module_tests = t-rmd160
module_tests = t-rmd160 t-mailbox
t_rmd160_SOURCES = t-rmd160.c rmd160.c
t_rmd160_LDADD = $(t_common_ldadd)
t_mailbox_SOURCES = t-mailbox.c mailbox.c
t_mailbox_LDADD = $(t_common_ldadd)
$(PROGRAMS): $(needed_libs) ../common/libgpgrl.a

184
g10/mailbox.c Normal file
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@ -0,0 +1,184 @@
/* mailbox.c - Mail address helper functions
* Copyright (C) 1998-2010 Free Software Foundation, Inc.
* Copyright (C) 2014-2015 Werner Koch
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "gpg.h"
#include "util.h"
#include "main.h"
static int
string_count_chr (const char *string, int c)
{
int count;
for (count=0; *string; string++ )
if ( *string == c )
count++;
return count;
}
static int
string_has_ctrl_or_space (const char *string)
{
for (; *string; string++ )
if (!(*string & 0x80) && *string <= 0x20)
return 1;
return 0;
}
/* Return true if STRING has two consecutive '.' after an '@'
sign. */
static int
has_dotdot_after_at (const char *string)
{
string = strchr (string, '@');
if (!string)
return 0; /* No at-sign. */
string++;
return !!strstr (string, "..");
}
/* Check whether the string has characters not valid in an RFC-822
address. To cope with OpenPGP we ignore non-ascii characters
so that for example umlauts are legal in an email address. An
OpenPGP user ID must be utf-8 encoded but there is no strict
requirement for RFC-822. Thus to avoid IDNA encoding we put the
address verbatim as utf-8 into the user ID under the assumption
that mail programs handle IDNA at a lower level and take OpenPGP
user IDs as utf-8. Note that we can't do an utf-8 encoding
checking here because in keygen.c this function is called with the
native encoding and native to utf-8 encoding is only done later. */
int
has_invalid_email_chars (const char *s)
{
int at_seen=0;
const char *valid_chars=
"01234567890_-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
for ( ; *s; s++ )
{
if ( (*s & 0x80) )
continue; /* We only care about ASCII. */
if ( *s == '@' )
at_seen=1;
else if ( !at_seen && !(strchr (valid_chars, *s)
|| strchr ("!#$%&'*+/=?^`{|}~", *s)))
return 1;
else if ( at_seen && !strchr( valid_chars, *s ) )
return 1;
}
return 0;
}
/* Check whether NAME represents a valid mailbox according to
RFC822. Returns true if so. */
int
is_valid_mailbox (const char *name)
{
return !( !name
|| !*name
|| has_invalid_email_chars (name)
|| string_count_chr (name,'@') != 1
|| *name == '@'
|| name[strlen(name)-1] == '@'
|| name[strlen(name)-1] == '.'
|| strstr (name, "..") );
}
/* Return the mailbox (local-part@domain) form a standard user id.
Caller must free the result. Returns NULL if no valid mailbox was
found (or we are out of memory). */
char *
mailbox_from_userid (const char *userid)
{
const char *s, *s_end;
size_t len;
char *result = NULL;
s = strchr (userid, '<');
if (s)
{
/* Seems to be a standard user id. */
s++;
s_end = strchr (s, '>');
if (s_end && s_end > s)
{
len = s_end - s;
result = xtrymalloc (len + 1);
if (!result)
return NULL; /* Ooops - out of core. */
strncpy (result, s, len);
result[len] = 0;
/* Apply some basic checks on the address. We do not use
is_valid_mailbox because those checks are too strict. */
if (string_count_chr (result, '@') != 1 /* Need exactly one '@. */
|| *result == '@' /* local-part missing. */
|| result[len-1] == '@' /* domain missing. */
|| result[len-1] == '.' /* ends with a dot. */
|| string_has_ctrl_or_space (result)
|| has_dotdot_after_at (result))
{
xfree (result);
result = NULL;
errno = EINVAL;
}
}
else
errno = EINVAL;
}
else if (is_valid_mailbox (userid))
{
/* The entire user id is a mailbox. Return that one. Note that
this fallback method has some restrictions on the valid
syntax of the mailbox. However, those who want weird
addresses should know about it and use the regular <...>
syntax. */
result = xtrystrdup (userid);
}
else
errno = EINVAL;
return result;
}
/* Check whether UID is a valid standard user id of the form
"Heinrich Heine <heinrichh@duesseldorf.de>"
and return true if this is the case. */
int
is_valid_user_id (const char *uid)
{
if (!uid || !*uid)
return 0;
return 1;
}

10
g10/main.h
View File

@ -162,9 +162,6 @@ char *optsep(char **stringp);
char *argsplit(char *string);
int parse_options(char *str,unsigned int *options,
struct parse_options *opts,int noisy);
int has_invalid_email_chars (const char *s);
int is_valid_mailbox (const char *name);
int is_valid_user_id (const char *uid);
const char *get_libexecdir (void);
int path_access(const char *file,int mode);
@ -179,6 +176,13 @@ int mpi_print (estream_t stream, gcry_mpi_t a, int mode);
unsigned int ecdsa_qbits_from_Q (unsigned int qbits);
/*-- mailbox.c --*/
int has_invalid_email_chars (const char *s);
int is_valid_mailbox (const char *name);
char *mailbox_from_userid (const char *userid);
int is_valid_user_id (const char *uid);
/*-- status.c --*/
void set_status_fd ( int fd );
int is_status_enabled ( void );

75
g10/misc.c
View File

@ -70,18 +70,6 @@
#include <assert.h>
static int
string_count_chr (const char *string, int c)
{
int count;
for (count=0; *string; string++ )
if ( *string == c )
count++;
return count;
}
#ifdef ENABLE_SELINUX_HACKS
/* A object and a global variable to keep track of files marked as
@ -1464,69 +1452,6 @@ parse_options(char *str,unsigned int *options,
}
/* Check whether the string has characters not valid in an RFC-822
address. To cope with OpenPGP we ignore non-ascii characters
so that for example umlauts are legal in an email address. An
OpenPGP user ID must be utf-8 encoded but there is no strict
requirement for RFC-822. Thus to avoid IDNA encoding we put the
address verbatim as utf-8 into the user ID under the assumption
that mail programs handle IDNA at a lower level and take OpenPGP
user IDs as utf-8. Note that we can't do an utf-8 encoding
checking here because in keygen.c this function is called with the
native encoding and native to utf-8 encoding is only done later. */
int
has_invalid_email_chars (const char *s)
{
int at_seen=0;
const char *valid_chars=
"01234567890_-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
for ( ; *s; s++ )
{
if ( (*s & 0x80) )
continue; /* We only care about ASCII. */
if ( *s == '@' )
at_seen=1;
else if ( !at_seen && !(strchr (valid_chars, *s)
|| strchr ("!#$%&'*+/=?^`{|}~", *s)))
return 1;
else if ( at_seen && !strchr( valid_chars, *s ) )
return 1;
}
return 0;
}
/* Check whether NAME represents a valid mailbox according to
RFC822. Returns true if so. */
int
is_valid_mailbox (const char *name)
{
return !( !name
|| !*name
|| has_invalid_email_chars (name)
|| string_count_chr (name,'@') != 1
|| *name == '@'
|| name[strlen(name)-1] == '@'
|| name[strlen(name)-1] == '.'
|| strstr (name, "..") );
}
/* Check whether UID is a valid standard user id of the form
"Heinrich Heine <heinrichh@duesseldorf.de>"
and return true if this is the case. */
int
is_valid_user_id (const char *uid)
{
if (!uid || !*uid)
return 0;
return 1;
}
/* Similar to access(2), but uses PATH to find the file. */
int
path_access(const char *file,int mode)

127
g10/t-mailbox.c Normal file
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@ -0,0 +1,127 @@
/* t-mailbox.c - Module test for mailbox.c
* Copyright (C) 2015 Werner Koch
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gpg.h"
#include "util.h"
#include "main.h"
#define pass() do { ; } while(0)
#define fail(a) do { fprintf (stderr, "%s:%d: test %d failed\n",\
__FILE__,__LINE__, (a)); \
exit (1); \
} while(0)
void *
gcry_malloc (size_t n)
{
return malloc (n);
}
char *
gcry_strdup (const char *string)
{
return strdup (string);
}
void
gcry_free (void *a)
{
if (a)
free (a);
}
static void
run_test (void)
{
static struct
{
const char *userid;
const char *mbox;
} testtbl[] =
{
{ "Werner Koch <wk@gnupg.org>", "wk@gnupg.org" },
{ "<wk@gnupg.org>", "wk@gnupg.org" },
{ "wk@gnupg.org", "wk@gnupg.org" },
{ "wk@gnupg.org ", NULL },
{ " wk@gnupg.org", NULL },
{ "Werner Koch (test) <wk@gnupg.org>", "wk@gnupg.org" },
{ "Werner Koch <wk@gnupg.org> (test)", "wk@gnupg.org" },
{ "Werner Koch <wk@gnupg.org (test)", NULL },
{ "Werner Koch <wk@gnupg.org >", NULL },
{ "Werner Koch <wk@gnupg.org", NULL },
{ "", NULL },
{ "@", NULL },
{ "bar <>", NULL },
{ "<foo@example.org>", "foo@example.org" },
{ "<foo.@example.org>", "foo.@example.org" },
{ "<.foo.@example.org>", ".foo.@example.org" },
{ "<foo..@example.org>", "foo..@example.org" },
{ "<foo..bar@example.org>", "foo..bar@example.org" },
{ "<foo@example.org.>", NULL },
{ "<foo@example..org>", NULL },
{ "<foo@.>", NULL },
{ "<@example.org>", NULL },
{ "<foo@@example.org>", NULL },
{ "<@foo@example.org>", NULL },
{ "<foo@example.org> ()", "foo@example.org" },
{ "<fo()o@example.org> ()", "fo()o@example.org" },
{ "<fo()o@example.org> ()", "fo()o@example.org" },
{ "fo()o@example.org", NULL},
{ "Mr. Foo <foo@example.org><bar@example.net>", "foo@example.org"},
{ NULL, NULL }
};
int idx;
for (idx=0; testtbl[idx].userid; idx++)
{
char *mbox = mailbox_from_userid (testtbl[idx].userid);
if (!testtbl[idx].mbox)
{
if (mbox)
fail (idx);
}
else if (!mbox)
fail (idx);
else if (strcmp (mbox, testtbl[idx].mbox))
fail (idx);
}
}
int
main (int argc, char **argv)
{
(void)argc;
(void)argv;
run_test ();
return 0;
}