Merge tag 'v2.14.1'
[git/raj.git] / credential-store.c
blobac295420dd0d03d1b31922f9b7c16a83e987e6a3
1 #include "cache.h"
2 #include "lockfile.h"
3 #include "credential.h"
4 #include "string-list.h"
5 #include "parse-options.h"
7 static struct lock_file credential_lock;
9 static int parse_credential_file(const char *fn,
10 struct credential *c,
11 void (*match_cb)(struct credential *),
12 void (*other_cb)(struct strbuf *))
14 FILE *fh;
15 struct strbuf line = STRBUF_INIT;
16 struct credential entry = CREDENTIAL_INIT;
17 int found_credential = 0;
19 fh = fopen(fn, "r");
20 if (!fh) {
21 if (errno != ENOENT && errno != EACCES)
22 die_errno("unable to open %s", fn);
23 return found_credential;
26 while (strbuf_getline_lf(&line, fh) != EOF) {
27 credential_from_url(&entry, line.buf);
28 if (entry.username && entry.password &&
29 credential_match(c, &entry)) {
30 found_credential = 1;
31 if (match_cb) {
32 match_cb(&entry);
33 break;
36 else if (other_cb)
37 other_cb(&line);
40 credential_clear(&entry);
41 strbuf_release(&line);
42 fclose(fh);
43 return found_credential;
46 static void print_entry(struct credential *c)
48 printf("username=%s\n", c->username);
49 printf("password=%s\n", c->password);
52 static void print_line(struct strbuf *buf)
54 strbuf_addch(buf, '\n');
55 write_or_die(get_lock_file_fd(&credential_lock), buf->buf, buf->len);
58 static void rewrite_credential_file(const char *fn, struct credential *c,
59 struct strbuf *extra)
61 if (hold_lock_file_for_update(&credential_lock, fn, 0) < 0)
62 die_errno("unable to get credential storage lock");
63 if (extra)
64 print_line(extra);
65 parse_credential_file(fn, c, NULL, print_line);
66 if (commit_lock_file(&credential_lock) < 0)
67 die_errno("unable to write credential store");
70 static void store_credential_file(const char *fn, struct credential *c)
72 struct strbuf buf = STRBUF_INIT;
74 strbuf_addf(&buf, "%s://", c->protocol);
75 strbuf_addstr_urlencode(&buf, c->username, 1);
76 strbuf_addch(&buf, ':');
77 strbuf_addstr_urlencode(&buf, c->password, 1);
78 strbuf_addch(&buf, '@');
79 if (c->host)
80 strbuf_addstr_urlencode(&buf, c->host, 1);
81 if (c->path) {
82 strbuf_addch(&buf, '/');
83 strbuf_addstr_urlencode(&buf, c->path, 0);
86 rewrite_credential_file(fn, c, &buf);
87 strbuf_release(&buf);
90 static void store_credential(const struct string_list *fns, struct credential *c)
92 struct string_list_item *fn;
95 * Sanity check that what we are storing is actually sensible.
96 * In particular, we can't make a URL without a protocol field.
97 * Without either a host or pathname (depending on the scheme),
98 * we have no primary key. And without a username and password,
99 * we are not actually storing a credential.
101 if (!c->protocol || !(c->host || c->path) || !c->username || !c->password)
102 return;
104 for_each_string_list_item(fn, fns)
105 if (!access(fn->string, F_OK)) {
106 store_credential_file(fn->string, c);
107 return;
110 * Write credential to the filename specified by fns->items[0], thus
111 * creating it
113 if (fns->nr)
114 store_credential_file(fns->items[0].string, c);
117 static void remove_credential(const struct string_list *fns, struct credential *c)
119 struct string_list_item *fn;
122 * Sanity check that we actually have something to match
123 * against. The input we get is a restrictive pattern,
124 * so technically a blank credential means "erase everything".
125 * But it is too easy to accidentally send this, since it is equivalent
126 * to empty input. So explicitly disallow it, and require that the
127 * pattern have some actual content to match.
129 if (!c->protocol && !c->host && !c->path && !c->username)
130 return;
131 for_each_string_list_item(fn, fns)
132 if (!access(fn->string, F_OK))
133 rewrite_credential_file(fn->string, c, NULL);
136 static void lookup_credential(const struct string_list *fns, struct credential *c)
138 struct string_list_item *fn;
140 for_each_string_list_item(fn, fns)
141 if (parse_credential_file(fn->string, c, print_entry, NULL))
142 return; /* Found credential */
145 int cmd_main(int argc, const char **argv)
147 const char * const usage[] = {
148 "git credential-store [<options>] <action>",
149 NULL
151 const char *op;
152 struct credential c = CREDENTIAL_INIT;
153 struct string_list fns = STRING_LIST_INIT_DUP;
154 char *file = NULL;
155 struct option options[] = {
156 OPT_STRING(0, "file", &file, "path",
157 "fetch and store credentials in <path>"),
158 OPT_END()
161 umask(077);
163 argc = parse_options(argc, (const char **)argv, NULL, options, usage, 0);
164 if (argc != 1)
165 usage_with_options(usage, options);
166 op = argv[0];
168 if (file) {
169 string_list_append(&fns, file);
170 } else {
171 if ((file = expand_user_path("~/.git-credentials", 0)))
172 string_list_append_nodup(&fns, file);
173 file = xdg_config_home("credentials");
174 if (file)
175 string_list_append_nodup(&fns, file);
177 if (!fns.nr)
178 die("unable to set up default path; use --file");
180 if (credential_read(&c, stdin) < 0)
181 die("unable to read credential");
183 if (!strcmp(op, "get"))
184 lookup_credential(&fns, &c);
185 else if (!strcmp(op, "erase"))
186 remove_credential(&fns, &c);
187 else if (!strcmp(op, "store"))
188 store_credential(&fns, &c);
189 else
190 ; /* Ignore unknown operation. */
192 string_list_clear(&fns, 0);
193 return 0;