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chromium / external / github.com / git / git / refs/tags/v2.14.2 / . / credential.c
blob: 9747f47b18bf2e622f11f41889faaa4b1845ac8d [file] [log] [blame]
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]1#include "cache.h"
Brandon Williamsb2141fc2017-06-14 18:07:36[diff] [blame]2#include "config.h"
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]3#include "credential.h"
4#include "string-list.h"
5#include "run-command.h"
Jeff Kingd3e847c2011-12-10 10:31:17[diff] [blame]6#include "url.h"
Jeff Kingd3c58b82011-12-10 10:40:54[diff] [blame]7#include "prompt.h"
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]8
9void credential_init(struct credential *c)
10{
11 memset(c, 0, sizeof(*c));
12 c->helpers.strdup_strings = 1;
13}
14
15void credential_clear(struct credential *c)
16{
17 free(c->protocol);
18 free(c->host);
19 free(c->path);
20 free(c->username);
21 free(c->password);
22 string_list_clear(&c->helpers, 0);
23
24 credential_init(c);
25}
26
Jeff King11825072011-12-10 10:31:24[diff] [blame]27int credential_match(const struct credential *want,
28 const struct credential *have)
29{
30#define CHECK(x) (!want->x || (have->x && !strcmp(want->x, have->x)))
31 return CHECK(protocol) &&
32 CHECK(host) &&
33 CHECK(path) &&
34 CHECK(username);
35#undef CHECK
36}
37
38static int credential_config_callback(const char *var, const char *value,
39 void *data)
40{
41 struct credential *c = data;
42 const char *key, *dot;
43
Jeff Kingcf4fff52014-06-18 19:44:19[diff] [blame]44 if (!skip_prefix(var, "credential.", &key))
Jeff King11825072011-12-10 10:31:24[diff] [blame]45 return 0;
46
47 if (!value)
48 return config_error_nonbool(var);
49
50 dot = strrchr(key, '.');
51 if (dot) {
52 struct credential want = CREDENTIAL_INIT;
53 char *url = xmemdupz(key, dot - key);
54 int matched;
55
56 credential_from_url(&want, url);
57 matched = credential_match(&want, c);
58
59 credential_clear(&want);
60 free(url);
61
62 if (!matched)
63 return 0;
64 key = dot + 1;
65 }
66
Jeff King24321372016-02-26 10:51:35[diff] [blame]67 if (!strcmp(key, "helper")) {
68 if (*value)
69 string_list_append(&c->helpers, value);
70 else
71 string_list_clear(&c->helpers, 0);
72 } else if (!strcmp(key, "username")) {
Jeff Kingd5742422011-12-10 10:31:30[diff] [blame]73 if (!c->username)
74 c->username = xstrdup(value);
75 }
Jeff Kinga78fbb42011-12-10 10:31:34[diff] [blame]76 else if (!strcmp(key, "usehttppath"))
77 c->use_http_path = git_config_bool(var, value);
Jeff King11825072011-12-10 10:31:24[diff] [blame]78
79 return 0;
80}
81
Jeff Kinga78fbb42011-12-10 10:31:34[diff] [blame]82static int proto_is_http(const char *s)
83{
84 if (!s)
85 return 0;
86 return !strcmp(s, "https") || !strcmp(s, "http");
87}
88
Jeff King11825072011-12-10 10:31:24[diff] [blame]89static void credential_apply_config(struct credential *c)
90{
91 if (c->configured)
92 return;
93 git_config(credential_config_callback, c);
94 c->configured = 1;
Jeff Kinga78fbb42011-12-10 10:31:34[diff] [blame]95
96 if (!c->use_http_path && proto_is_http(c->protocol)) {
Ævar Arnfjörð Bjarmason6a83d902017-06-15 23:15:46[diff] [blame]97 FREE_AND_NULL(c->path);
Jeff Kinga78fbb42011-12-10 10:31:34[diff] [blame]98 }
Jeff King11825072011-12-10 10:31:24[diff] [blame]99}
100
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]101static void credential_describe(struct credential *c, struct strbuf *out)
102{
103 if (!c->protocol)
104 return;
105 strbuf_addf(out, "%s://", c->protocol);
106 if (c->username && *c->username)
107 strbuf_addf(out, "%s@", c->username);
108 if (c->host)
109 strbuf_addstr(out, c->host);
110 if (c->path)
111 strbuf_addf(out, "/%s", c->path);
112}
113
Jeff Kingce77aa42011-12-10 10:41:23[diff] [blame]114static char *credential_ask_one(const char *what, struct credential *c,
115 int flags)
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]116{
117 struct strbuf desc = STRBUF_INIT;
118 struct strbuf prompt = STRBUF_INIT;
119 char *r;
120
121 credential_describe(c, &desc);
122 if (desc.len)
123 strbuf_addf(&prompt, "%s for '%s': ", what, desc.buf);
124 else
125 strbuf_addf(&prompt, "%s: ", what);
126
Jeff Kingce77aa42011-12-10 10:41:23[diff] [blame]127 r = git_prompt(prompt.buf, flags);
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]128
129 strbuf_release(&desc);
130 strbuf_release(&prompt);
131 return xstrdup(r);
132}
133
134static void credential_getpass(struct credential *c)
135{
136 if (!c->username)
Jeff Kingce77aa42011-12-10 10:41:23[diff] [blame]137 c->username = credential_ask_one("Username", c,
138 PROMPT_ASKPASS|PROMPT_ECHO);
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]139 if (!c->password)
Jeff Kingce77aa42011-12-10 10:41:23[diff] [blame]140 c->password = credential_ask_one("Password", c,
141 PROMPT_ASKPASS);
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]142}
143
144int credential_read(struct credential *c, FILE *fp)
145{
146 struct strbuf line = STRBUF_INIT;
147
Junio C Hamano8f309ae2016-01-13 23:31:17[diff] [blame]148 while (strbuf_getline_lf(&line, fp) != EOF) {
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]149 char *key = line.buf;
150 char *value = strchr(key, '=');
151
152 if (!line.len)
153 break;
154
155 if (!value) {
156 warning("invalid credential line: %s", key);
157 strbuf_release(&line);
158 return -1;
159 }
160 *value++ = '\0';
161
162 if (!strcmp(key, "username")) {
163 free(c->username);
164 c->username = xstrdup(value);
165 } else if (!strcmp(key, "password")) {
166 free(c->password);
167 c->password = xstrdup(value);
168 } else if (!strcmp(key, "protocol")) {
169 free(c->protocol);
170 c->protocol = xstrdup(value);
171 } else if (!strcmp(key, "host")) {
172 free(c->host);
173 c->host = xstrdup(value);
174 } else if (!strcmp(key, "path")) {
175 free(c->path);
176 c->path = xstrdup(value);
Jeff King9c183a72012-07-18 12:06:26[diff] [blame]177 } else if (!strcmp(key, "url")) {
178 credential_from_url(c, value);
Jeff King59b38652014-12-04 03:46:48[diff] [blame]179 } else if (!strcmp(key, "quit")) {
180 c->quit = !!git_config_bool("quit", value);
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]181 }
182 /*
183 * Ignore other lines; we don't know what they mean, but
184 * this future-proofs us when later versions of git do
185 * learn new lines, and the helpers are updated to match.
186 */
187 }
188
189 strbuf_release(&line);
190 return 0;
191}
192
193static void credential_write_item(FILE *fp, const char *key, const char *value)
194{
195 if (!value)
196 return;
197 fprintf(fp, "%s=%s\n", key, value);
198}
199
Matthieu Moy2d6dc182012-06-24 11:40:00[diff] [blame]200void credential_write(const struct credential *c, FILE *fp)
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]201{
202 credential_write_item(fp, "protocol", c->protocol);
203 credential_write_item(fp, "host", c->host);
204 credential_write_item(fp, "path", c->path);
205 credential_write_item(fp, "username", c->username);
206 credential_write_item(fp, "password", c->password);
207}
208
209static int run_credential_helper(struct credential *c,
210 const char *cmd,
211 int want_output)
212{
René Scharfed3180272014-08-19 19:09:35[diff] [blame]213 struct child_process helper = CHILD_PROCESS_INIT;
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]214 const char *argv[] = { NULL, NULL };
215 FILE *fp;
216
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]217 argv[0] = cmd;
218 helper.argv = argv;
219 helper.use_shell = 1;
220 helper.in = -1;
221 if (want_output)
222 helper.out = -1;
223 else
224 helper.no_stdout = 1;
225
226 if (start_command(&helper) < 0)
227 return -1;
228
229 fp = xfdopen(helper.in, "w");
230 credential_write(c, fp);
231 fclose(fp);
232
233 if (want_output) {
234 int r;
235 fp = xfdopen(helper.out, "r");
236 r = credential_read(c, fp);
237 fclose(fp);
238 if (r < 0) {
239 finish_command(&helper);
240 return -1;
241 }
242 }
243
244 if (finish_command(&helper))
245 return -1;
246 return 0;
247}
248
249static int credential_do(struct credential *c, const char *helper,
250 const char *operation)
251{
252 struct strbuf cmd = STRBUF_INIT;
253 int r;
254
255 if (helper[0] == '!')
256 strbuf_addstr(&cmd, helper + 1);
257 else if (is_absolute_path(helper))
258 strbuf_addstr(&cmd, helper);
259 else
260 strbuf_addf(&cmd, "git credential-%s", helper);
261
262 strbuf_addf(&cmd, " %s", operation);
263 r = run_credential_helper(c, cmd.buf, !strcmp(operation, "get"));
264
265 strbuf_release(&cmd);
266 return r;
267}
268
269void credential_fill(struct credential *c)
270{
271 int i;
272
273 if (c->username && c->password)
274 return;
275
Jeff King11825072011-12-10 10:31:24[diff] [blame]276 credential_apply_config(c);
277
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]278 for (i = 0; i < c->helpers.nr; i++) {
279 credential_do(c, c->helpers.items[i].string, "get");
280 if (c->username && c->password)
281 return;
Jeff King59b38652014-12-04 03:46:48[diff] [blame]282 if (c->quit)
283 die("credential helper '%s' told us to quit",
284 c->helpers.items[i].string);
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]285 }
286
287 credential_getpass(c);
288 if (!c->username && !c->password)
289 die("unable to get password from user");
290}
291
292void credential_approve(struct credential *c)
293{
294 int i;
295
296 if (c->approved)
297 return;
298 if (!c->username || !c->password)
299 return;
300
Jeff King11825072011-12-10 10:31:24[diff] [blame]301 credential_apply_config(c);
302
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]303 for (i = 0; i < c->helpers.nr; i++)
304 credential_do(c, c->helpers.items[i].string, "store");
305 c->approved = 1;
306}
307
308void credential_reject(struct credential *c)
309{
310 int i;
311
Jeff King11825072011-12-10 10:31:24[diff] [blame]312 credential_apply_config(c);
313
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]314 for (i = 0; i < c->helpers.nr; i++)
315 credential_do(c, c->helpers.items[i].string, "erase");
316
Ævar Arnfjörð Bjarmason88ce3ef2017-06-15 23:15:49[diff] [blame]317 FREE_AND_NULL(c->username);
318 FREE_AND_NULL(c->password);
Jeff Kingabca9272011-12-10 10:31:11[diff] [blame]319 c->approved = 0;
320}
Jeff Kingd3e847c2011-12-10 10:31:17[diff] [blame]321
322void credential_from_url(struct credential *c, const char *url)
323{
324 const char *at, *colon, *cp, *slash, *host, *proto_end;
325
326 credential_clear(c);
327
328 /*
329 * Match one of:
330 * (1) proto://<host>/...
331 * (2) proto://<user>@<host>/...
332 * (3) proto://<user>:<pass>@<host>/...
333 */
334 proto_end = strstr(url, "://");
335 if (!proto_end)
336 return;
337 cp = proto_end + 3;
338 at = strchr(cp, '@');
339 colon = strchr(cp, ':');
340 slash = strchrnul(cp, '/');
341
342 if (!at || slash <= at) {
343 /* Case (1) */
344 host = cp;
345 }
346 else if (!colon || at <= colon) {
347 /* Case (2) */
348 c->username = url_decode_mem(cp, at - cp);
349 host = at + 1;
350 } else {
351 /* Case (3) */
352 c->username = url_decode_mem(cp, colon - cp);
353 c->password = url_decode_mem(colon + 1, at - (colon + 1));
354 host = at + 1;
355 }
356
357 if (proto_end - url > 0)
358 c->protocol = xmemdupz(url, proto_end - url);
359 if (slash - host > 0)
360 c->host = url_decode_mem(host, slash - host);
361 /* Trim leading and trailing slashes from path */
362 while (*slash == '/')
363 slash++;
364 if (*slash) {
365 char *p;
366 c->path = url_decode(slash);
367 p = c->path + strlen(c->path) - 1;
368 while (p > c->path && *p == '/')
369 *p-- = '\0';
370 }
371}