| #include "cache.h" | |
| #include "config.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")) { | |
| if (*value) | |
| string_list_append(&c->helpers, value); | |
| else | |
| string_list_clear(&c->helpers, 0); | |
| } 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_AND_NULL(c->path); | |
| } | |
| } | |
| 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_lf(&line, fp) != 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_AND_NULL(c->username); | |
| FREE_AND_NULL(c->password); | |
| 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'; | |
| } | |
| } |
