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pretend-git/credential.c at master · submitgit/pretend-git · GitHub
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#include
"cache.h"
#include
"credential.h"
#include
"string-list.h"
#include
"run-command.h"
#include
"url.h"
#include
"prompt.h"
void
credential_init
(
struct
credential
*
c
)
{
memset
(
c
,
0
,
sizeof
(
*
c
));
c
->
helpers
.
strdup_strings
=
1
;
}
void
credential_clear
(
struct
credential
*
c
)
{
free
(
c
->
protocol
);
free
(
c
->
host
);
free
(
c
->
path
);
free
(
c
->
username
);
free
(
c
->
password
);
string_list_clear
(
&
c
->
helpers
,
0
);
credential_init
(
c
);
}
int
credential_match
(
const
struct
credential
*
want
,
const
struct
credential
*
have
)
{
#define
CHECK
(
x
) (!want->x || (have->x && !strcmp(want->x, have->x)))
return
CHECK
(
protocol
)
&&
CHECK
(
host
)
&&
CHECK
(
path
)
&&
CHECK
(
username
);
#undef
CHECK
}
static
int
credential_config_callback
(
const
char
*
var
,
const
char
*
value
,
void
*
data
)
{
struct
credential
*
c
=
data
;
const
char
*
key
,
*
dot
;
if
(!
skip_prefix
(
var
,
"credential."
,
&
key
))
return
0
;
if
(!
value
)
return
config_error_nonbool
(
var
);
dot
=
strrchr
(
key
,
'.'
);
if
(
dot
) {
struct
credential
want
=
CREDENTIAL_INIT
;
char
*
url
=
xmemdupz
(
key
,
dot
-
key
);
int
matched
;
credential_from_url
(
&
want
,
url
);
matched
=
credential_match
(
&
want
,
c
);
credential_clear
(
&
want
);
free
(
url
);
if
(!
matched
)
return
0
;
key
=
dot
+
1
;
}
if
(!
strcmp
(
key
,
"helper"
))
string_list_append
(
&
c
->
helpers
,
value
);
else
if
(!
strcmp
(
key
,
"username"
)) {
if
(!
c
->
username
)
c
->
username
=
xstrdup
(
value
);
}
else
if
(!
strcmp
(
key
,
"usehttppath"
))
c
->
use_http_path
=
git_config_bool
(
var
,
value
);
return
0
;
}
static
int
proto_is_http
(
const
char
*
s
)
{
if
(!
s
)
return
0
;
return
!
strcmp
(
s
,
"https"
)
||
!
strcmp
(
s
,
"http"
);
}
static
void
credential_apply_config
(
struct
credential
*
c
)
{
if
(
c
->
configured
)
return
;
git_config
(
credential_config_callback
,
c
);
c
->
configured
=
1
;
if
(!
c
->
use_http_path
&&
proto_is_http
(
c
->
protocol
)) {
free
(
c
->
path
);
c
->
path
=
NULL
;
}
}
static
void
credential_describe
(
struct
credential
*
c
,
struct
strbuf
*
out
)
{
if
(!
c
->
protocol
)
return
;
strbuf_addf
(
out
,
"%s://"
,
c
->
protocol
);
if
(
c
->
username
&&
*
c
->
username
)
strbuf_addf
(
out
,
"%s@"
,
c
->
username
);
if
(
c
->
host
)
strbuf_addstr
(
out
,
c
->
host
);
if
(
c
->
path
)
strbuf_addf
(
out
,
"/%s"
,
c
->
path
);
}
static
char
*
credential_ask_one
(
const
char
*
what
,
struct
credential
*
c
,
int
flags
)
{
struct
strbuf
desc
=
STRBUF_INIT
;
struct
strbuf
prompt
=
STRBUF_INIT
;
char
*
r
;
credential_describe
(
c
,
&
desc
);
if
(
desc
.
len
)
strbuf_addf
(
&
prompt
,
"%s for '%s': "
,
what
,
desc
.
buf
);
else
strbuf_addf
(
&
prompt
,
"%s: "
,
what
);
r
=
git_prompt
(
prompt
.
buf
,
flags
);
strbuf_release
(
&
desc
);
strbuf_release
(
&
prompt
);
return
xstrdup
(
r
);
}
static
void
credential_getpass
(
struct
credential
*
c
)
{
if
(!
c
->
username
)
c
->
username
=
credential_ask_one
(
"Username"
,
c
,
PROMPT_ASKPASS
|
PROMPT_ECHO
);
if
(!
c
->
password
)
c
->
password
=
credential_ask_one
(
"Password"
,
c
,
PROMPT_ASKPASS
);
}
int
credential_read
(
struct
credential
*
c
,
FILE
*
fp
)
{
struct
strbuf
line
=
STRBUF_INIT
;
while
(
strbuf_getline
(
&
line
,
fp
,
'\n'
)
!=
EOF
) {
char
*
key
=
line
.
buf
;
char
*
value
=
strchr
(
key
,
'='
);
if
(!
line
.
len
)
break
;
if
(!
value
) {
warning
(
"invalid credential line: %s"
,
key
);
strbuf_release
(
&
line
);
return
-1
;
}
*
value
++
=
'\0'
;
if
(!
strcmp
(
key
,
"username"
)) {
free
(
c
->
username
);
c
->
username
=
xstrdup
(
value
);
}
else
if
(!
strcmp
(
key
,
"password"
)) {
free
(
c
->
password
);
c
->
password
=
xstrdup
(
value
);
}
else
if
(!
strcmp
(
key
,
"protocol"
)) {
free
(
c
->
protocol
);
c
->
protocol
=
xstrdup
(
value
);
}
else
if
(!
strcmp
(
key
,
"host"
)) {
free
(
c
->
host
);
c
->
host
=
xstrdup
(
value
);
}
else
if
(!
strcmp
(
key
,
"path"
)) {
free
(
c
->
path
);
c
->
path
=
xstrdup
(
value
);
}
else
if
(!
strcmp
(
key
,
"url"
)) {
credential_from_url
(
c
,
value
);
}
else
if
(!
strcmp
(
key
,
"quit"
)) {
c
->
quit
=
!!
git_config_bool
(
"quit"
,
value
);
}
/*
* Ignore other lines; we don't know what they mean, but
* this future-proofs us when later versions of git do
* learn new lines, and the helpers are updated to match.
*/
}
strbuf_release
(
&
line
);
return
0
;
}
static
void
credential_write_item
(
FILE
*
fp
,
const
char
*
key
,
const
char
*
value
)
{
if
(!
value
)
return
;
fprintf
(
fp
,
"%s=%s\n"
,
key
,
value
);
}
void
credential_write
(
const
struct
credential
*
c
,
FILE
*
fp
)
{
credential_write_item
(
fp
,
"protocol"
,
c
->
protocol
);
credential_write_item
(
fp
,
"host"
,
c
->
host
);
credential_write_item
(
fp
,
"path"
,
c
->
path
);
credential_write_item
(
fp
,
"username"
,
c
->
username
);
credential_write_item
(
fp
,
"password"
,
c
->
password
);
}
static
int
run_credential_helper
(
struct
credential
*
c
,
const
char
*
cmd
,
int
want_output
)
{
struct
child_process
helper
=
CHILD_PROCESS_INIT
;
const
char
*
argv
[]
=
{
NULL
,
NULL
};
FILE
*
fp
;
argv
[
0
]
=
cmd
;
helper
.
argv
=
argv
;
helper
.
use_shell
=
1
;
helper
.
in
=
-1
;
if
(
want_output
)
helper
.
out
=
-1
;
else
helper
.
no_stdout
=
1
;
if
(
start_command
(
&
helper
)
<
0
)
return
-1
;
fp
=
xfdopen
(
helper
.
in
,
"w"
);
credential_write
(
c
,
fp
);
fclose
(
fp
);
if
(
want_output
) {
int
r
;
fp
=
xfdopen
(
helper
.
out
,
"r"
);
r
=
credential_read
(
c
,
fp
);
fclose
(
fp
);
if
(
r
<
0
) {
finish_command
(
&
helper
);
return
-1
;
}
}
if
(
finish_command
(
&
helper
))
return
-1
;
return
0
;
}
static
int
credential_do
(
struct
credential
*
c
,
const
char
*
helper
,
const
char
*
operation
)
{
struct
strbuf
cmd
=
STRBUF_INIT
;
int
r
;
if
(
helper
[
0
]
==
'!'
)
strbuf_addstr
(
&
cmd
,
helper
+
1
);
else
if
(
is_absolute_path
(
helper
))
strbuf_addstr
(
&
cmd
,
helper
);
else
strbuf_addf
(
&
cmd
,
"git credential-%s"
,
helper
);
strbuf_addf
(
&
cmd
,
" %s"
,
operation
);
r
=
run_credential_helper
(
c
,
cmd
.
buf
, !
strcmp
(
operation
,
"get"
));
strbuf_release
(
&
cmd
);
return
r
;
}
void
credential_fill
(
struct
credential
*
c
)
{
int
i
;
if
(
c
->
username
&&
c
->
password
)
return
;
credential_apply_config
(
c
);
for
(
i
=
0
;
i
<
c
->
helpers
.
nr
;
i
++
) {
credential_do
(
c
,
c
->
helpers
.
items
[
i
].
string
,
"get"
);
if
(
c
->
username
&&
c
->
password
)
return
;
if
(
c
->
quit
)
die
(
"credential helper '%s' told us to quit"
,
c
->
helpers
.
items
[
i
].
string
);
}
credential_getpass
(
c
);
if
(!
c
->
username
&&
!
c
->
password
)
die
(
"unable to get password from user"
);
}
void
credential_approve
(
struct
credential
*
c
)
{
int
i
;
if
(
c
->
approved
)
return
;
if
(!
c
->
username
||
!
c
->
password
)
return
;
credential_apply_config
(
c
);
for
(
i
=
0
;
i
<
c
->
helpers
.
nr
;
i
++
)
credential_do
(
c
,
c
->
helpers
.
items
[
i
].
string
,
"store"
);
c
->
approved
=
1
;
}
void
credential_reject
(
struct
credential
*
c
)
{
int
i
;
credential_apply_config
(
c
);
for
(
i
=
0
;
i
<
c
->
helpers
.
nr
;
i
++
)
credential_do
(
c
,
c
->
helpers
.
items
[
i
].
string
,
"erase"
);
free
(
c
->
username
);
c
->
username
=
NULL
;
free
(
c
->
password
);
c
->
password
=
NULL
;
c
->
approved
=
0
;
}
void
credential_from_url
(
struct
credential
*
c
,
const
char
*
url
)
{
const
char
*
at
,
*
colon
,
*
cp
,
*
slash
,
*
host
,
*
proto_end
;
credential_clear
(
c
);
/*
* Match one of:
* (1) proto://<host>/...
* (2) proto://<user>@<host>/...
* (3) proto://<user>:<pass>@<host>/...
*/
proto_end
=
strstr
(
url
,
"://"
);
if
(!
proto_end
)
return
;
cp
=
proto_end
+
3
;
at
=
strchr
(
cp
,
'@'
);
colon
=
strchr
(
cp
,
':'
);
slash
=
strchrnul
(
cp
,
'/'
);
if
(!
at
||
slash
<=
at
) {
/* Case (1) */
host
=
cp
;
}
else
if
(!
colon
||
at
<=
colon
) {
/* Case (2) */
c
->
username
=
url_decode_mem
(
cp
,
at
-
cp
);
host
=
at
+
1
;
}
else
{
/* Case (3) */
c
->
username
=
url_decode_mem
(
cp
,
colon
-
cp
);
c
->
password
=
url_decode_mem
(
colon
+
1
,
at
-
(
colon
+
1
));
host
=
at
+
1
;
}
if
(
proto_end
-
url
>
0
)
c
->
protocol
=
xmemdupz
(
url
,
proto_end
-
url
);
if
(
slash
-
host
>
0
)
c
->
host
=
url_decode_mem
(
host
,
slash
-
host
);
/* Trim leading and trailing slashes from path */
while
(
*
slash
==
'/'
)
slash
++
;
if
(
*
slash
) {
char
*
p
;
c
->
path
=
url_decode
(
slash
);
p
=
c
->
path
+
strlen
(
c
->
path
)
-
1
;
while
(
p
>
c
->
path
&&
*
p
==
'/'
)
*
p
--
=
'\0'
;
}
}
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