Merge branch 'dl/compat-cleanup'
[git/git.git] / credential.c
CommitLineData
abca927d 1#include "cache.h"
b2141fc1 2#include "config.h"
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3#include "credential.h"
4#include "string-list.h"
5#include "run-command.h"
d3e847c1 6#include "url.h"
d3c58b83 7#include "prompt.h"
a0d51e8d 8#include "sigchain.h"
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9
10void credential_init(struct credential *c)
11{
12 memset(c, 0, sizeof(*c));
13 c->helpers.strdup_strings = 1;
14}
15
16void credential_clear(struct credential *c)
17{
18 free(c->protocol);
19 free(c->host);
20 free(c->path);
21 free(c->username);
22 free(c->password);
23 string_list_clear(&c->helpers, 0);
24
25 credential_init(c);
26}
27
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28int credential_match(const struct credential *want,
29 const struct credential *have)
30{
31#define CHECK(x) (!want->x || (have->x && !strcmp(want->x, have->x)))
32 return CHECK(protocol) &&
33 CHECK(host) &&
34 CHECK(path) &&
35 CHECK(username);
36#undef CHECK
37}
38
39static int credential_config_callback(const char *var, const char *value,
40 void *data)
41{
42 struct credential *c = data;
43 const char *key, *dot;
44
cf4fff57 45 if (!skip_prefix(var, "credential.", &key))
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46 return 0;
47
48 if (!value)
49 return config_error_nonbool(var);
50
51 dot = strrchr(key, '.');
52 if (dot) {
53 struct credential want = CREDENTIAL_INIT;
54 char *url = xmemdupz(key, dot - key);
55 int matched;
56
57 credential_from_url(&want, url);
58 matched = credential_match(&want, c);
59
60 credential_clear(&want);
61 free(url);
62
63 if (!matched)
64 return 0;
65 key = dot + 1;
66 }
67
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68 if (!strcmp(key, "helper")) {
69 if (*value)
70 string_list_append(&c->helpers, value);
71 else
72 string_list_clear(&c->helpers, 0);
73 } else if (!strcmp(key, "username")) {
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74 if (!c->username)
75 c->username = xstrdup(value);
76 }
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77 else if (!strcmp(key, "usehttppath"))
78 c->use_http_path = git_config_bool(var, value);
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79
80 return 0;
81}
82
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83static int proto_is_http(const char *s)
84{
85 if (!s)
86 return 0;
87 return !strcmp(s, "https") || !strcmp(s, "http");
88}
89
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90static void credential_apply_config(struct credential *c)
91{
92 if (c->configured)
93 return;
94 git_config(credential_config_callback, c);
95 c->configured = 1;
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96
97 if (!c->use_http_path && proto_is_http(c->protocol)) {
6a83d902 98 FREE_AND_NULL(c->path);
a78fbb4f 99 }
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100}
101
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102static void credential_describe(struct credential *c, struct strbuf *out)
103{
104 if (!c->protocol)
105 return;
106 strbuf_addf(out, "%s://", c->protocol);
107 if (c->username && *c->username)
108 strbuf_addf(out, "%s@", c->username);
109 if (c->host)
110 strbuf_addstr(out, c->host);
111 if (c->path)
112 strbuf_addf(out, "/%s", c->path);
113}
114
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115static char *credential_ask_one(const char *what, struct credential *c,
116 int flags)
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117{
118 struct strbuf desc = STRBUF_INIT;
119 struct strbuf prompt = STRBUF_INIT;
120 char *r;
121
122 credential_describe(c, &desc);
123 if (desc.len)
124 strbuf_addf(&prompt, "%s for '%s': ", what, desc.buf);
125 else
126 strbuf_addf(&prompt, "%s: ", what);
127
ce77aa48 128 r = git_prompt(prompt.buf, flags);
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129
130 strbuf_release(&desc);
131 strbuf_release(&prompt);
132 return xstrdup(r);
133}
134
135static void credential_getpass(struct credential *c)
136{
137 if (!c->username)
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138 c->username = credential_ask_one("Username", c,
139 PROMPT_ASKPASS|PROMPT_ECHO);
abca927d 140 if (!c->password)
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141 c->password = credential_ask_one("Password", c,
142 PROMPT_ASKPASS);
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143}
144
145int credential_read(struct credential *c, FILE *fp)
146{
147 struct strbuf line = STRBUF_INIT;
148
8f309aeb 149 while (strbuf_getline_lf(&line, fp) != EOF) {
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150 char *key = line.buf;
151 char *value = strchr(key, '=');
152
153 if (!line.len)
154 break;
155
156 if (!value) {
157 warning("invalid credential line: %s", key);
158 strbuf_release(&line);
159 return -1;
160 }
161 *value++ = '\0';
162
163 if (!strcmp(key, "username")) {
164 free(c->username);
165 c->username = xstrdup(value);
166 } else if (!strcmp(key, "password")) {
167 free(c->password);
168 c->password = xstrdup(value);
169 } else if (!strcmp(key, "protocol")) {
170 free(c->protocol);
171 c->protocol = xstrdup(value);
172 } else if (!strcmp(key, "host")) {
173 free(c->host);
174 c->host = xstrdup(value);
175 } else if (!strcmp(key, "path")) {
176 free(c->path);
177 c->path = xstrdup(value);
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178 } else if (!strcmp(key, "url")) {
179 credential_from_url(c, value);
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180 } else if (!strcmp(key, "quit")) {
181 c->quit = !!git_config_bool("quit", value);
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182 }
183 /*
184 * Ignore other lines; we don't know what they mean, but
185 * this future-proofs us when later versions of git do
186 * learn new lines, and the helpers are updated to match.
187 */
188 }
189
190 strbuf_release(&line);
191 return 0;
192}
193
194static void credential_write_item(FILE *fp, const char *key, const char *value)
195{
196 if (!value)
197 return;
198 fprintf(fp, "%s=%s\n", key, value);
199}
200
2d6dc182 201void credential_write(const struct credential *c, FILE *fp)
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202{
203 credential_write_item(fp, "protocol", c->protocol);
204 credential_write_item(fp, "host", c->host);
205 credential_write_item(fp, "path", c->path);
206 credential_write_item(fp, "username", c->username);
207 credential_write_item(fp, "password", c->password);
208}
209
210static int run_credential_helper(struct credential *c,
211 const char *cmd,
212 int want_output)
213{
d3180279 214 struct child_process helper = CHILD_PROCESS_INIT;
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215 const char *argv[] = { NULL, NULL };
216 FILE *fp;
217
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218 argv[0] = cmd;
219 helper.argv = argv;
220 helper.use_shell = 1;
221 helper.in = -1;
222 if (want_output)
223 helper.out = -1;
224 else
225 helper.no_stdout = 1;
226
227 if (start_command(&helper) < 0)
228 return -1;
229
230 fp = xfdopen(helper.in, "w");
a0d51e8d 231 sigchain_push(SIGPIPE, SIG_IGN);
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232 credential_write(c, fp);
233 fclose(fp);
a0d51e8d 234 sigchain_pop(SIGPIPE);
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235
236 if (want_output) {
237 int r;
238 fp = xfdopen(helper.out, "r");
239 r = credential_read(c, fp);
240 fclose(fp);
241 if (r < 0) {
242 finish_command(&helper);
243 return -1;
244 }
245 }
246
247 if (finish_command(&helper))
248 return -1;
249 return 0;
250}
251
252static int credential_do(struct credential *c, const char *helper,
253 const char *operation)
254{
255 struct strbuf cmd = STRBUF_INIT;
256 int r;
257
258 if (helper[0] == '!')
259 strbuf_addstr(&cmd, helper + 1);
260 else if (is_absolute_path(helper))
261 strbuf_addstr(&cmd, helper);
262 else
263 strbuf_addf(&cmd, "git credential-%s", helper);
264
265 strbuf_addf(&cmd, " %s", operation);
266 r = run_credential_helper(c, cmd.buf, !strcmp(operation, "get"));
267
268 strbuf_release(&cmd);
269 return r;
270}
271
272void credential_fill(struct credential *c)
273{
274 int i;
275
276 if (c->username && c->password)
277 return;
278
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279 credential_apply_config(c);
280
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281 for (i = 0; i < c->helpers.nr; i++) {
282 credential_do(c, c->helpers.items[i].string, "get");
283 if (c->username && c->password)
284 return;
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285 if (c->quit)
286 die("credential helper '%s' told us to quit",
287 c->helpers.items[i].string);
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288 }
289
290 credential_getpass(c);
291 if (!c->username && !c->password)
292 die("unable to get password from user");
293}
294
295void credential_approve(struct credential *c)
296{
297 int i;
298
299 if (c->approved)
300 return;
301 if (!c->username || !c->password)
302 return;
303
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304 credential_apply_config(c);
305
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306 for (i = 0; i < c->helpers.nr; i++)
307 credential_do(c, c->helpers.items[i].string, "store");
308 c->approved = 1;
309}
310
311void credential_reject(struct credential *c)
312{
313 int i;
314
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315 credential_apply_config(c);
316
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317 for (i = 0; i < c->helpers.nr; i++)
318 credential_do(c, c->helpers.items[i].string, "erase");
319
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320 FREE_AND_NULL(c->username);
321 FREE_AND_NULL(c->password);
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322 c->approved = 0;
323}
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324
325void credential_from_url(struct credential *c, const char *url)
326{
327 const char *at, *colon, *cp, *slash, *host, *proto_end;
328
329 credential_clear(c);
330
331 /*
332 * Match one of:
333 * (1) proto://<host>/...
334 * (2) proto://<user>@<host>/...
335 * (3) proto://<user>:<pass>@<host>/...
336 */
337 proto_end = strstr(url, "://");
338 if (!proto_end)
339 return;
340 cp = proto_end + 3;
341 at = strchr(cp, '@');
342 colon = strchr(cp, ':');
343 slash = strchrnul(cp, '/');
344
345 if (!at || slash <= at) {
346 /* Case (1) */
347 host = cp;
348 }
349 else if (!colon || at <= colon) {
350 /* Case (2) */
351 c->username = url_decode_mem(cp, at - cp);
352 host = at + 1;
353 } else {
354 /* Case (3) */
355 c->username = url_decode_mem(cp, colon - cp);
356 c->password = url_decode_mem(colon + 1, at - (colon + 1));
357 host = at + 1;
358 }
359
360 if (proto_end - url > 0)
361 c->protocol = xmemdupz(url, proto_end - url);
362 if (slash - host > 0)
363 c->host = url_decode_mem(host, slash - host);
364 /* Trim leading and trailing slashes from path */
365 while (*slash == '/')
366 slash++;
367 if (*slash) {
368 char *p;
369 c->path = url_decode(slash);
370 p = c->path + strlen(c->path) - 1;
371 while (p > c->path && *p == '/')
372 *p-- = '\0';
373 }
374}