diff options
Diffstat (limited to 'third_party/git/credential.c')
| -rw-r--r-- | third_party/git/credential.c | 212 |
1 files changed, 175 insertions, 37 deletions
diff --git a/third_party/git/credential.c b/third_party/git/credential.c index 62be651b03b5..e5202fbef261 100644 --- a/third_party/git/credential.c +++ b/third_party/git/credential.c @@ -6,6 +6,7 @@ #include "url.h" #include "prompt.h" #include "sigchain.h" +#include "urlmatch.h" void credential_init(struct credential *c) { @@ -36,11 +37,15 @@ int credential_match(const struct credential *want, #undef CHECK } + +static int credential_from_potentially_partial_url(struct credential *c, + const char *url); + static int credential_config_callback(const char *var, const char *value, void *data) { struct credential *c = data; - const char *key, *dot; + const char *key; if (!skip_prefix(var, "credential.", &key)) return 0; @@ -48,31 +53,16 @@ static int credential_config_callback(const char *var, const char *value, 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) + if (!c->username_from_proto) { + free(c->username); c->username = xstrdup(value); + } } else if (!strcmp(key, "usehttppath")) c->use_http_path = git_config_bool(var, value); @@ -87,11 +77,60 @@ static int proto_is_http(const char *s) return !strcmp(s, "https") || !strcmp(s, "http"); } +static void credential_describe(struct credential *c, struct strbuf *out); +static void credential_format(struct credential *c, struct strbuf *out); + +static int select_all(const struct urlmatch_item *a, + const struct urlmatch_item *b) +{ + return 0; +} + +static int match_partial_url(const char *url, void *cb) +{ + struct credential *c = cb; + struct credential want = CREDENTIAL_INIT; + int matches = 0; + + if (credential_from_potentially_partial_url(&want, url) < 0) + warning(_("skipping credential lookup for key: credential.%s"), + url); + else + matches = credential_match(&want, c); + credential_clear(&want); + + return matches; +} + static void credential_apply_config(struct credential *c) { + char *normalized_url; + struct urlmatch_config config = { STRING_LIST_INIT_DUP }; + struct strbuf url = STRBUF_INIT; + + if (!c->host) + die(_("refusing to work with credential missing host field")); + if (!c->protocol) + die(_("refusing to work with credential missing protocol field")); + if (c->configured) return; - git_config(credential_config_callback, c); + + config.section = "credential"; + config.key = NULL; + config.collect_fn = credential_config_callback; + config.cascade_fn = NULL; + config.select_fn = select_all; + config.fallback_match_fn = match_partial_url; + config.cb = c; + + credential_format(c, &url); + normalized_url = url_normalize(url.buf, &config.url); + + git_config(urlmatch_config_entry, &config); + free(normalized_url); + strbuf_release(&url); + c->configured = 1; if (!c->use_http_path && proto_is_http(c->protocol)) { @@ -112,6 +151,23 @@ static void credential_describe(struct credential *c, struct strbuf *out) strbuf_addf(out, "/%s", c->path); } +static void credential_format(struct credential *c, struct strbuf *out) +{ + if (!c->protocol) + return; + strbuf_addf(out, "%s://", c->protocol); + if (c->username && *c->username) { + strbuf_add_percentencode(out, c->username, STRBUF_ENCODE_SLASH); + strbuf_addch(out, '@'); + } + if (c->host) + strbuf_addstr(out, c->host); + if (c->path) { + strbuf_addch(out, '/'); + strbuf_add_percentencode(out, c->path, 0); + } +} + static char *credential_ask_one(const char *what, struct credential *c, int flags) { @@ -146,7 +202,7 @@ int credential_read(struct credential *c, FILE *fp) { struct strbuf line = STRBUF_INIT; - while (strbuf_getline_lf(&line, fp) != EOF) { + while (strbuf_getline(&line, fp) != EOF) { char *key = line.buf; char *value = strchr(key, '='); @@ -163,6 +219,7 @@ int credential_read(struct credential *c, FILE *fp) if (!strcmp(key, "username")) { free(c->username); c->username = xstrdup(value); + c->username_from_proto = 1; } else if (!strcmp(key, "password")) { free(c->password); c->password = xstrdup(value); @@ -191,20 +248,25 @@ int credential_read(struct credential *c, FILE *fp) return 0; } -static void credential_write_item(FILE *fp, const char *key, const char *value) +static void credential_write_item(FILE *fp, const char *key, const char *value, + int required) { + if (!value && required) + BUG("credential value for %s is missing", key); if (!value) return; + if (strchr(value, '\n')) + die("credential value for %s contains newline", key); 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); + credential_write_item(fp, "protocol", c->protocol, 1); + credential_write_item(fp, "host", c->host, 1); + credential_write_item(fp, "path", c->path, 0); + credential_write_item(fp, "username", c->username, 0); + credential_write_item(fp, "password", c->password, 0); } static int run_credential_helper(struct credential *c, @@ -212,11 +274,9 @@ static int run_credential_helper(struct credential *c, int want_output) { struct child_process helper = CHILD_PROCESS_INIT; - const char *argv[] = { NULL, NULL }; FILE *fp; - argv[0] = cmd; - helper.argv = argv; + strvec_push(&helper.args, cmd); helper.use_shell = 1; helper.in = -1; if (want_output) @@ -322,7 +382,45 @@ void credential_reject(struct credential *c) c->approved = 0; } -void credential_from_url(struct credential *c, const char *url) +static int check_url_component(const char *url, int quiet, + const char *name, const char *value) +{ + if (!value) + return 0; + if (!strchr(value, '\n')) + return 0; + + if (!quiet) + warning(_("url contains a newline in its %s component: %s"), + name, url); + return -1; +} + +/* + * Potentially-partial URLs can, but do not have to, contain + * + * - a protocol (or scheme) of the form "<protocol>://" + * + * - a host name (the part after the protocol and before the first slash after + * that, if any) + * + * - a user name and potentially a password (as "<user>[:<password>]@" part of + * the host name) + * + * - a path (the part after the host name, if any, starting with the slash) + * + * Missing parts will be left unset in `struct credential`. Thus, `https://` + * will have only the `protocol` set, `example.com` only the host name, and + * `/git` only the path. + * + * Note that an empty host name in an otherwise fully-qualified URL (e.g. + * `cert:///path/to/cert.pem`) will be treated as unset if we expect the URL to + * be potentially partial, and only then (otherwise, the empty string is used). + * + * The credential_from_url() function does not allow partial URLs. + */ +static int credential_from_url_1(struct credential *c, const char *url, + int allow_partial_url, int quiet) { const char *at, *colon, *cp, *slash, *host, *proto_end; @@ -335,12 +433,22 @@ void credential_from_url(struct credential *c, const char *url) * (3) proto://<user>:<pass>@<host>/... */ proto_end = strstr(url, "://"); - if (!proto_end) - return; - cp = proto_end + 3; + if (!allow_partial_url && (!proto_end || proto_end == url)) { + if (!quiet) + warning(_("url has no scheme: %s"), url); + return -1; + } + cp = proto_end ? proto_end + 3 : url; at = strchr(cp, '@'); colon = strchr(cp, ':'); - slash = strchrnul(cp, '/'); + + /* + * A query or fragment marker before the slash ends the host portion. + * We'll just continue to call this "slash" for simplicity. Notably our + * "trim leading slashes" part won't skip over this part of the path, + * but that's what we'd want. + */ + slash = cp + strcspn(cp, "/?#"); if (!at || slash <= at) { /* Case (1) */ @@ -349,17 +457,21 @@ void credential_from_url(struct credential *c, const char *url) else if (!colon || at <= colon) { /* Case (2) */ c->username = url_decode_mem(cp, at - cp); + if (c->username && *c->username) + c->username_from_proto = 1; host = at + 1; } else { /* Case (3) */ c->username = url_decode_mem(cp, colon - cp); + if (c->username && *c->username) + c->username_from_proto = 1; c->password = url_decode_mem(colon + 1, at - (colon + 1)); host = at + 1; } - if (proto_end - url > 0) + if (proto_end && proto_end - url > 0) c->protocol = xmemdupz(url, proto_end - url); - if (slash - host > 0) + if (!allow_partial_url || slash - host > 0) c->host = url_decode_mem(host, slash - host); /* Trim leading and trailing slashes from path */ while (*slash == '/') @@ -371,4 +483,30 @@ void credential_from_url(struct credential *c, const char *url) while (p > c->path && *p == '/') *p-- = '\0'; } + + if (check_url_component(url, quiet, "username", c->username) < 0 || + check_url_component(url, quiet, "password", c->password) < 0 || + check_url_component(url, quiet, "protocol", c->protocol) < 0 || + check_url_component(url, quiet, "host", c->host) < 0 || + check_url_component(url, quiet, "path", c->path) < 0) + return -1; + + return 0; +} + +static int credential_from_potentially_partial_url(struct credential *c, + const char *url) +{ + return credential_from_url_1(c, url, 1, 0); +} + +int credential_from_url_gently(struct credential *c, const char *url, int quiet) +{ + return credential_from_url_1(c, url, 0, quiet); +} + +void credential_from_url(struct credential *c, const char *url) +{ + if (credential_from_url_gently(c, url, 0) < 0) + die(_("credential url cannot be parsed: %s"), url); } |