mirror of
https://github.com/git/git
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158 lines
3.9 KiB
C
158 lines
3.9 KiB
C
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#include "cache.h"
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#include "credential.h"
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#include "string-list.h"
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#include "parse-options.h"
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static struct lock_file credential_lock;
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static void parse_credential_file(const char *fn,
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struct credential *c,
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void (*match_cb)(struct credential *),
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void (*other_cb)(struct strbuf *))
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{
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FILE *fh;
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struct strbuf line = STRBUF_INIT;
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struct credential entry = CREDENTIAL_INIT;
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fh = fopen(fn, "r");
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if (!fh) {
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if (errno != ENOENT)
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die_errno("unable to open %s", fn);
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return;
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}
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while (strbuf_getline(&line, fh, '\n') != EOF) {
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credential_from_url(&entry, line.buf);
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if (entry.username && entry.password &&
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credential_match(c, &entry)) {
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if (match_cb) {
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match_cb(&entry);
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break;
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}
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}
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else if (other_cb)
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other_cb(&line);
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}
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credential_clear(&entry);
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strbuf_release(&line);
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fclose(fh);
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}
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static void print_entry(struct credential *c)
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{
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printf("username=%s\n", c->username);
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printf("password=%s\n", c->password);
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}
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static void print_line(struct strbuf *buf)
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{
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strbuf_addch(buf, '\n');
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write_or_die(credential_lock.fd, buf->buf, buf->len);
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}
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static void rewrite_credential_file(const char *fn, struct credential *c,
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struct strbuf *extra)
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{
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if (hold_lock_file_for_update(&credential_lock, fn, 0) < 0)
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die_errno("unable to get credential storage lock");
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if (extra)
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print_line(extra);
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parse_credential_file(fn, c, NULL, print_line);
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if (commit_lock_file(&credential_lock) < 0)
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die_errno("unable to commit credential store");
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}
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static void store_credential(const char *fn, struct credential *c)
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{
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struct strbuf buf = STRBUF_INIT;
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/*
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* Sanity check that what we are storing is actually sensible.
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* In particular, we can't make a URL without a protocol field.
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* Without either a host or pathname (depending on the scheme),
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* we have no primary key. And without a username and password,
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* we are not actually storing a credential.
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*/
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if (!c->protocol || !(c->host || c->path) ||
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!c->username || !c->password)
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return;
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strbuf_addf(&buf, "%s://", c->protocol);
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strbuf_addstr_urlencode(&buf, c->username, 1);
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strbuf_addch(&buf, ':');
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strbuf_addstr_urlencode(&buf, c->password, 1);
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strbuf_addch(&buf, '@');
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if (c->host)
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strbuf_addstr_urlencode(&buf, c->host, 1);
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if (c->path) {
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strbuf_addch(&buf, '/');
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strbuf_addstr_urlencode(&buf, c->path, 0);
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}
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rewrite_credential_file(fn, c, &buf);
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strbuf_release(&buf);
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}
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static void remove_credential(const char *fn, struct credential *c)
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{
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/*
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* Sanity check that we actually have something to match
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* against. The input we get is a restrictive pattern,
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* so technically a blank credential means "erase everything".
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* But it is too easy to accidentally send this, since it is equivalent
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* to empty input. So explicitly disallow it, and require that the
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* pattern have some actual content to match.
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*/
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if (c->protocol || c->host || c->path || c->username)
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rewrite_credential_file(fn, c, NULL);
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}
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static int lookup_credential(const char *fn, struct credential *c)
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{
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parse_credential_file(fn, c, print_entry, NULL);
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return c->username && c->password;
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}
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int main(int argc, const char **argv)
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{
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const char * const usage[] = {
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"git credential-store [options] <action>",
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NULL
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};
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const char *op;
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struct credential c = CREDENTIAL_INIT;
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char *file = NULL;
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struct option options[] = {
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OPT_STRING(0, "file", &file, "path",
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"fetch and store credentials in <path>"),
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OPT_END()
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};
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umask(077);
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argc = parse_options(argc, argv, NULL, options, usage, 0);
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if (argc != 1)
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usage_with_options(usage, options);
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op = argv[0];
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if (!file)
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file = expand_user_path("~/.git-credentials");
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if (!file)
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die("unable to set up default path; use --file");
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if (credential_read(&c, stdin) < 0)
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die("unable to read credential");
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if (!strcmp(op, "get"))
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lookup_credential(file, &c);
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else if (!strcmp(op, "erase"))
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remove_credential(file, &c);
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else if (!strcmp(op, "store"))
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store_credential(file, &c);
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else
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; /* Ignore unknown operation. */
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return 0;
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}
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