diff options
Diffstat (limited to 'http.c')
-rw-r--r-- | http.c | 844 |
1 files changed, 730 insertions, 114 deletions
@@ -8,7 +8,15 @@ #include "credential.h" #include "version.h" #include "pkt-line.h" +#include "gettext.h" +#include "transport.h" +static struct trace_key trace_curl = TRACE_KEY_INIT(CURL); +#if LIBCURL_VERSION_NUM >= 0x070a08 +long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER; +#else +long int git_curl_ipresolve; +#endif int active_requests; int http_is_verbose; size_t http_post_buffer = 16 * LARGE_PACKET_MAX; @@ -28,29 +36,82 @@ static CURL *curl_default; #endif #define PREV_BUF_SIZE 4096 -#define RANGE_HEADER_SIZE 30 char curl_errorstr[CURL_ERROR_SIZE]; static int curl_ssl_verify = -1; static int curl_ssl_try; static const char *ssl_cert; +static const char *ssl_cipherlist; +static const char *ssl_version; +static struct { + const char *name; + long ssl_version; +} sslversions[] = { + { "sslv2", CURL_SSLVERSION_SSLv2 }, + { "sslv3", CURL_SSLVERSION_SSLv3 }, + { "tlsv1", CURL_SSLVERSION_TLSv1 }, +#if LIBCURL_VERSION_NUM >= 0x072200 + { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 }, + { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 }, + { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 }, +#endif +}; #if LIBCURL_VERSION_NUM >= 0x070903 static const char *ssl_key; #endif #if LIBCURL_VERSION_NUM >= 0x070908 static const char *ssl_capath; #endif +#if LIBCURL_VERSION_NUM >= 0x072c00 +static const char *ssl_pinnedkey; +#endif static const char *ssl_cainfo; static long curl_low_speed_limit = -1; static long curl_low_speed_time = -1; static int curl_ftp_no_epsv; static const char *curl_http_proxy; +static const char *curl_no_proxy; +static const char *http_proxy_authmethod; +static struct { + const char *name; + long curlauth_param; +} proxy_authmethods[] = { + { "basic", CURLAUTH_BASIC }, + { "digest", CURLAUTH_DIGEST }, + { "negotiate", CURLAUTH_GSSNEGOTIATE }, + { "ntlm", CURLAUTH_NTLM }, +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY + { "anyauth", CURLAUTH_ANY }, +#endif + /* + * CURLAUTH_DIGEST_IE has no corresponding command-line option in + * curl(1) and is not included in CURLAUTH_ANY, so we leave it out + * here, too + */ +}; +#if LIBCURL_VERSION_NUM >= 0x071600 +static const char *curl_deleg; +static struct { + const char *name; + long curl_deleg_param; +} curl_deleg_levels[] = { + { "none", CURLGSSAPI_DELEGATION_NONE }, + { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG }, + { "always", CURLGSSAPI_DELEGATION_FLAG }, +}; +#endif + +static struct credential proxy_auth = CREDENTIAL_INIT; +static const char *curl_proxyuserpwd; static const char *curl_cookie_file; static int curl_save_cookies; struct credential http_auth = CREDENTIAL_INIT; static int http_proactive_auth; static const char *user_agent; +static int curl_empty_auth; + +enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL; #if LIBCURL_VERSION_NUM >= 0x071700 /* Use CURLOPT_KEYPASSWD as is */ @@ -62,12 +123,18 @@ static const char *user_agent; static struct credential cert_auth = CREDENTIAL_INIT; static int ssl_cert_password_required; +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY +static unsigned long http_auth_methods = CURLAUTH_ANY; +#endif static struct curl_slist *pragma_header; static struct curl_slist *no_pragma_header; +static struct curl_slist *extra_http_headers; static struct active_request_slot *active_queue_head; +static char *cached_accept_language; + size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) { size_t size = eltsize * nmemb; @@ -114,6 +181,47 @@ size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf) return eltsize * nmemb; } +static void closedown_active_slot(struct active_request_slot *slot) +{ + active_requests--; + slot->in_use = 0; +} + +static void finish_active_slot(struct active_request_slot *slot) +{ + closedown_active_slot(slot); + curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); + + if (slot->finished != NULL) + (*slot->finished) = 1; + + /* Store slot results so they can be read after the slot is reused */ + if (slot->results != NULL) { + slot->results->curl_result = slot->curl_result; + slot->results->http_code = slot->http_code; +#if LIBCURL_VERSION_NUM >= 0x070a08 + curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL, + &slot->results->auth_avail); +#else + slot->results->auth_avail = 0; +#endif + + curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE, + &slot->results->http_connectcode); + } + + /* Run callback if appropriate */ + if (slot->callback_func != NULL) + slot->callback_func(slot->callback_data); +} + +static void xmulti_remove_handle(struct active_request_slot *slot) +{ +#ifdef USE_CURL_MULTI + curl_multi_remove_handle(curlm, slot->curl); +#endif +} + #ifdef USE_CURL_MULTI static void process_curl_messages(void) { @@ -129,7 +237,7 @@ static void process_curl_messages(void) slot->curl != curl_message->easy_handle) slot = slot->next; if (slot != NULL) { - curl_multi_remove_handle(curlm, slot->curl); + xmulti_remove_handle(slot); slot->curl_result = curl_result; finish_active_slot(slot); } else { @@ -150,6 +258,10 @@ static int http_options(const char *var, const char *value, void *cb) curl_ssl_verify = git_config_bool(var, value); return 0; } + if (!strcmp("http.sslcipherlist", var)) + return git_config_string(&ssl_cipherlist, var, value); + if (!strcmp("http.sslversion", var)) + return git_config_string(&ssl_version, var, value); if (!strcmp("http.sslcert", var)) return git_config_string(&ssl_cert, var, value); #if LIBCURL_VERSION_NUM >= 0x070903 @@ -158,10 +270,10 @@ static int http_options(const char *var, const char *value, void *cb) #endif #if LIBCURL_VERSION_NUM >= 0x070908 if (!strcmp("http.sslcapath", var)) - return git_config_string(&ssl_capath, var, value); + return git_config_pathname(&ssl_capath, var, value); #endif if (!strcmp("http.sslcainfo", var)) - return git_config_string(&ssl_cainfo, var, value); + return git_config_pathname(&ssl_cainfo, var, value); if (!strcmp("http.sslcertpasswordprotected", var)) { ssl_cert_password_required = git_config_bool(var, value); return 0; @@ -200,8 +312,11 @@ static int http_options(const char *var, const char *value, void *cb) if (!strcmp("http.proxy", var)) return git_config_string(&curl_http_proxy, var, value); + if (!strcmp("http.proxyauthmethod", var)) + return git_config_string(&http_proxy_authmethod, var, value); + if (!strcmp("http.cookiefile", var)) - return git_config_string(&curl_cookie_file, var, value); + return git_config_pathname(&curl_cookie_file, var, value); if (!strcmp("http.savecookies", var)) { curl_save_cookies = git_config_bool(var, value); return 0; @@ -217,14 +332,63 @@ static int http_options(const char *var, const char *value, void *cb) if (!strcmp("http.useragent", var)) return git_config_string(&user_agent, var, value); + if (!strcmp("http.emptyauth", var)) { + curl_empty_auth = git_config_bool(var, value); + return 0; + } + + if (!strcmp("http.delegation", var)) { +#if LIBCURL_VERSION_NUM >= 0x071600 + return git_config_string(&curl_deleg, var, value); +#else + warning(_("Delegation control is not supported with cURL < 7.22.0")); + return 0; +#endif + } + + if (!strcmp("http.pinnedpubkey", var)) { +#if LIBCURL_VERSION_NUM >= 0x072c00 + return git_config_pathname(&ssl_pinnedkey, var, value); +#else + warning(_("Public key pinning not supported with cURL < 7.44.0")); + return 0; +#endif + } + + if (!strcmp("http.extraheader", var)) { + if (!value) { + return config_error_nonbool(var); + } else if (!*value) { + curl_slist_free_all(extra_http_headers); + extra_http_headers = NULL; + } else { + extra_http_headers = + curl_slist_append(extra_http_headers, value); + } + return 0; + } + + if (!strcmp("http.followredirects", var)) { + if (value && !strcmp(value, "initial")) + http_follow_config = HTTP_FOLLOW_INITIAL; + else if (git_config_bool(var, value)) + http_follow_config = HTTP_FOLLOW_ALWAYS; + else + http_follow_config = HTTP_FOLLOW_NONE; + return 0; + } + /* Fall back on the default ones */ return git_default_config(var, value, cb); } static void init_curl_http_auth(CURL *result) { - if (!http_auth.username) + if (!http_auth.username || !*http_auth.username) { + if (curl_empty_auth) + curl_easy_setopt(result, CURLOPT_USERPWD, ":"); return; + } credential_fill(&http_auth); @@ -248,6 +412,64 @@ static void init_curl_http_auth(CURL *result) #endif } +/* *var must be free-able */ +static void var_override(const char **var, char *value) +{ + if (value) { + free((void *)*var); + *var = xstrdup(value); + } +} + +static void set_proxyauth_name_password(CURL *result) +{ +#if LIBCURL_VERSION_NUM >= 0x071301 + curl_easy_setopt(result, CURLOPT_PROXYUSERNAME, + proxy_auth.username); + curl_easy_setopt(result, CURLOPT_PROXYPASSWORD, + proxy_auth.password); +#else + struct strbuf s = STRBUF_INIT; + + strbuf_addstr_urlencode(&s, proxy_auth.username, 1); + strbuf_addch(&s, ':'); + strbuf_addstr_urlencode(&s, proxy_auth.password, 1); + curl_proxyuserpwd = strbuf_detach(&s, NULL); + curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd); +#endif +} + +static void init_curl_proxy_auth(CURL *result) +{ + if (proxy_auth.username) { + if (!proxy_auth.password) + credential_fill(&proxy_auth); + set_proxyauth_name_password(result); + } + + var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD")); + +#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */ + if (http_proxy_authmethod) { + int i; + for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) { + if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) { + curl_easy_setopt(result, CURLOPT_PROXYAUTH, + proxy_authmethods[i].curlauth_param); + break; + } + } + if (i == ARRAY_SIZE(proxy_authmethods)) { + warning("unsupported proxy authentication method %s: using anyauth", + http_proxy_authmethod); + curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); + } + } + else + curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); +#endif +} + static int has_cert_password(void) { if (ssl_cert == NULL || ssl_cert_password_required != 1) @@ -279,8 +501,7 @@ static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type) rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len); if (rc < 0) - warning("unable to set SO_KEEPALIVE on socket %s", - strerror(errno)); + warning_errno("unable to set SO_KEEPALIVE on socket"); return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */ } @@ -297,6 +518,140 @@ static void set_curl_keepalive(CURL *c) } #endif +static void redact_sensitive_header(struct strbuf *header) +{ + const char *sensitive_header; + + if (skip_prefix(header->buf, "Authorization:", &sensitive_header) || + skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) { + /* The first token is the type, which is OK to log */ + while (isspace(*sensitive_header)) + sensitive_header++; + while (*sensitive_header && !isspace(*sensitive_header)) + sensitive_header++; + /* Everything else is opaque and possibly sensitive */ + strbuf_setlen(header, sensitive_header - header->buf); + strbuf_addstr(header, " <redacted>"); + } +} + +static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header) +{ + struct strbuf out = STRBUF_INIT; + struct strbuf **headers, **header; + + strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n", + text, (long)size, (long)size); + trace_strbuf(&trace_curl, &out); + strbuf_reset(&out); + strbuf_add(&out, ptr, size); + headers = strbuf_split_max(&out, '\n', 0); + + for (header = headers; *header; header++) { + if (hide_sensitive_header) + redact_sensitive_header(*header); + strbuf_insert((*header), 0, text, strlen(text)); + strbuf_insert((*header), strlen(text), ": ", 2); + strbuf_rtrim((*header)); + strbuf_addch((*header), '\n'); + trace_strbuf(&trace_curl, (*header)); + } + strbuf_list_free(headers); + strbuf_release(&out); +} + +static void curl_dump_data(const char *text, unsigned char *ptr, size_t size) +{ + size_t i; + struct strbuf out = STRBUF_INIT; + unsigned int width = 60; + + strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n", + text, (long)size, (long)size); + trace_strbuf(&trace_curl, &out); + + for (i = 0; i < size; i += width) { + size_t w; + + strbuf_reset(&out); + strbuf_addf(&out, "%s: ", text); + for (w = 0; (w < width) && (i + w < size); w++) { + unsigned char ch = ptr[i + w]; + + strbuf_addch(&out, + (ch >= 0x20) && (ch < 0x80) + ? ch : '.'); + } + strbuf_addch(&out, '\n'); + trace_strbuf(&trace_curl, &out); + } + strbuf_release(&out); +} + +static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp) +{ + const char *text; + enum { NO_FILTER = 0, DO_FILTER = 1 }; + + switch (type) { + case CURLINFO_TEXT: + trace_printf_key(&trace_curl, "== Info: %s", data); + default: /* we ignore unknown types by default */ + return 0; + + case CURLINFO_HEADER_OUT: + text = "=> Send header"; + curl_dump_header(text, (unsigned char *)data, size, DO_FILTER); + break; + case CURLINFO_DATA_OUT: + text = "=> Send data"; + curl_dump_data(text, (unsigned char *)data, size); + break; + case CURLINFO_SSL_DATA_OUT: + text = "=> Send SSL data"; + curl_dump_data(text, (unsigned char *)data, size); + break; + case CURLINFO_HEADER_IN: + text = "<= Recv header"; + curl_dump_header(text, (unsigned char *)data, size, NO_FILTER); + break; + case CURLINFO_DATA_IN: + text = "<= Recv data"; + curl_dump_data(text, (unsigned char *)data, size); + break; + case CURLINFO_SSL_DATA_IN: + text = "<= Recv SSL data"; + curl_dump_data(text, (unsigned char *)data, size); + break; + } + return 0; +} + +void setup_curl_trace(CURL *handle) +{ + if (!trace_want(&trace_curl)) + return; + curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); + curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace); + curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL); +} + +static long get_curl_allowed_protocols(int from_user) +{ + long allowed_protocols = 0; + + if (is_transport_allowed("http", from_user)) + allowed_protocols |= CURLPROTO_HTTP; + if (is_transport_allowed("https", from_user)) + allowed_protocols |= CURLPROTO_HTTPS; + if (is_transport_allowed("ftp", from_user)) + allowed_protocols |= CURLPROTO_FTP; + if (is_transport_allowed("ftps", from_user)) + allowed_protocols |= CURLPROTO_FTPS; + + return allowed_protocols; +} + static CURL *get_curl_handle(void) { CURL *result = curl_easy_init(); @@ -321,9 +676,47 @@ static CURL *get_curl_handle(void) curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY); #endif +#if LIBCURL_VERSION_NUM >= 0x071600 + if (curl_deleg) { + int i; + for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) { + if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) { + curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION, + curl_deleg_levels[i].curl_deleg_param); + break; + } + } + if (i == ARRAY_SIZE(curl_deleg_levels)) + warning("Unknown delegation method '%s': using default", + curl_deleg); + } +#endif + if (http_proactive_auth) init_curl_http_auth(result); + if (getenv("GIT_SSL_VERSION")) + ssl_version = getenv("GIT_SSL_VERSION"); + if (ssl_version && *ssl_version) { + int i; + for (i = 0; i < ARRAY_SIZE(sslversions); i++) { + if (!strcmp(ssl_version, sslversions[i].name)) { + curl_easy_setopt(result, CURLOPT_SSLVERSION, + sslversions[i].ssl_version); + break; + } + } + if (i == ARRAY_SIZE(sslversions)) + warning("unsupported ssl version %s: using default", + ssl_version); + } + + if (getenv("GIT_SSL_CIPHER_LIST")) + ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST"); + if (ssl_cipherlist != NULL && *ssl_cipherlist) + curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST, + ssl_cipherlist); + if (ssl_cert != NULL) curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); if (has_cert_password()) @@ -336,6 +729,10 @@ static CURL *get_curl_handle(void) if (ssl_capath != NULL) curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); #endif +#if LIBCURL_VERSION_NUM >= 0x072c00 + if (ssl_pinnedkey != NULL) + curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey); +#endif if (ssl_cainfo != NULL) curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); @@ -346,15 +743,24 @@ static CURL *get_curl_handle(void) curl_low_speed_time); } - curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1); + curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20); #if LIBCURL_VERSION_NUM >= 0x071301 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL); #elif LIBCURL_VERSION_NUM >= 0x071101 curl_easy_setopt(result, CURLOPT_POST301, 1); #endif - +#if LIBCURL_VERSION_NUM >= 0x071304 + curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS, + get_curl_allowed_protocols(0)); + curl_easy_setopt(result, CURLOPT_PROTOCOLS, + get_curl_allowed_protocols(-1)); +#else + warning("protocol restrictions not applied to curl redirects because\n" + "your curl version is too old (>= 7.19.4)"); +#endif if (getenv("GIT_CURL_VERBOSE")) - curl_easy_setopt(result, CURLOPT_VERBOSE, 1); + curl_easy_setopt(result, CURLOPT_VERBOSE, 1L); + setup_curl_trace(result); curl_easy_setopt(result, CURLOPT_USERAGENT, user_agent ? user_agent : git_user_agent()); @@ -367,10 +773,64 @@ static CURL *get_curl_handle(void) curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY); #endif + /* + * CURL also examines these variables as a fallback; but we need to query + * them here in order to decide whether to prompt for missing password (cf. + * init_curl_proxy_auth()). + * + * Unlike many other common environment variables, these are historically + * lowercase only. It appears that CURL did not know this and implemented + * only uppercase variants, which was later corrected to take both - with + * the exception of http_proxy, which is lowercase only also in CURL. As + * the lowercase versions are the historical quasi-standard, they take + * precedence here, as in CURL. + */ + if (!curl_http_proxy) { + if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) { + var_override(&curl_http_proxy, getenv("HTTPS_PROXY")); + var_override(&curl_http_proxy, getenv("https_proxy")); + } else { + var_override(&curl_http_proxy, getenv("http_proxy")); + } + if (!curl_http_proxy) { + var_override(&curl_http_proxy, getenv("ALL_PROXY")); + var_override(&curl_http_proxy, getenv("all_proxy")); + } + } + if (curl_http_proxy) { curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); - curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); +#if LIBCURL_VERSION_NUM >= 0x071800 + if (starts_with(curl_http_proxy, "socks5h")) + curl_easy_setopt(result, + CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME); + else if (starts_with(curl_http_proxy, "socks5")) + curl_easy_setopt(result, + CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5); + else if (starts_with(curl_http_proxy, "socks4a")) + curl_easy_setopt(result, + CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A); + else if (starts_with(curl_http_proxy, "socks")) + curl_easy_setopt(result, + CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4); +#endif + if (strstr(curl_http_proxy, "://")) + credential_from_url(&proxy_auth, curl_http_proxy); + else { + struct strbuf url = STRBUF_INIT; + strbuf_addf(&url, "http://%s", curl_http_proxy); + credential_from_url(&proxy_auth, url.buf); + strbuf_release(&url); + } + + curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host); +#if LIBCURL_VERSION_NUM >= 0x071304 + var_override(&curl_no_proxy, getenv("NO_PROXY")); + var_override(&curl_no_proxy, getenv("no_proxy")); + curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy); +#endif } + init_curl_proxy_auth(result); set_curl_keepalive(result); @@ -411,8 +871,13 @@ void http_init(struct remote *remote, const char *url, int proactive_auth) if (remote && remote->http_proxy) curl_http_proxy = xstrdup(remote->http_proxy); - pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache"); - no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:"); + if (remote) + var_override(&http_proxy_authmethod, remote->http_proxy_authmethod); + + pragma_header = curl_slist_append(http_copy_default_headers(), + "Pragma: no-cache"); + no_pragma_header = curl_slist_append(http_copy_default_headers(), + "Pragma:"); #ifdef USE_CURL_MULTI { @@ -479,9 +944,7 @@ void http_cleanup(void) while (slot != NULL) { struct active_request_slot *next = slot->next; if (slot->curl != NULL) { -#ifdef USE_CURL_MULTI - curl_multi_remove_handle(curlm, slot->curl); -#endif + xmulti_remove_handle(slot); curl_easy_cleanup(slot->curl); } free(slot); @@ -498,6 +961,9 @@ void http_cleanup(void) #endif curl_global_cleanup(); + curl_slist_free_all(extra_http_headers); + extra_http_headers = NULL; + curl_slist_free_all(pragma_header); pragma_header = NULL; @@ -509,12 +975,27 @@ void http_cleanup(void) curl_http_proxy = NULL; } + if (proxy_auth.password) { + memset(proxy_auth.password, 0, strlen(proxy_auth.password)); + free(proxy_auth.password); + proxy_auth.password = NULL; + } + + free((void *)curl_proxyuserpwd); + curl_proxyuserpwd = NULL; + + free((void *)http_proxy_authmethod); + http_proxy_authmethod = NULL; + if (cert_auth.password != NULL) { memset(cert_auth.password, 0, strlen(cert_auth.password)); free(cert_auth.password); cert_auth.password = NULL; } ssl_cert_password_required = 0; + + free(cached_accept_language); + cached_accept_language = NULL; } struct active_request_slot *get_active_slot(void) @@ -580,7 +1061,25 @@ struct active_request_slot *get_active_slot(void) curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1); - if (http_auth.password) + curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL); + + /* + * Default following to off unless "ALWAYS" is configured; this gives + * callers a sane starting point, and they can tweak for individual + * HTTP_FOLLOW_* cases themselves. + */ + if (http_follow_config == HTTP_FOLLOW_ALWAYS) + curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1); + else + curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0); + +#if LIBCURL_VERSION_NUM >= 0x070a08 + curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve); +#endif +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY + curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods); +#endif + if (http_auth.password || curl_empty_auth) init_curl_http_auth(slot->curl); return slot; @@ -594,6 +1093,8 @@ int start_active_slot(struct active_request_slot *slot) if (curlm_result != CURLM_OK && curlm_result != CURLM_CALL_MULTI_PERFORM) { + warning("curl_multi_add_handle failed: %s", + curl_multi_strerror(curlm_result)); active_requests--; slot->in_use = 0; return 0; @@ -730,53 +1231,22 @@ void run_active_slot(struct active_request_slot *slot) #endif } -static void closedown_active_slot(struct active_request_slot *slot) -{ - active_requests--; - slot->in_use = 0; -} - static void release_active_slot(struct active_request_slot *slot) { closedown_active_slot(slot); - if (slot->curl && curl_session_count > min_curl_sessions) { -#ifdef USE_CURL_MULTI - curl_multi_remove_handle(curlm, slot->curl); -#endif - curl_easy_cleanup(slot->curl); - slot->curl = NULL; - curl_session_count--; + if (slot->curl) { + xmulti_remove_handle(slot); + if (curl_session_count > min_curl_sessions) { + curl_easy_cleanup(slot->curl); + slot->curl = NULL; + curl_session_count--; + } } #ifdef USE_CURL_MULTI fill_active_slots(); #endif } -void finish_active_slot(struct active_request_slot *slot) -{ - closedown_active_slot(slot); - curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); - - if (slot->finished != NULL) - (*slot->finished) = 1; - - /* Store slot results so they can be read after the slot is reused */ - if (slot->results != NULL) { - slot->results->curl_result = slot->curl_result; - slot->results->http_code = slot->http_code; -#if LIBCURL_VERSION_NUM >= 0x070a08 - curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL, - &slot->results->auth_avail); -#else - slot->results->auth_avail = 0; -#endif - } - - /* Run callback if appropriate */ - if (slot->callback_func != NULL) - slot->callback_func(slot->callback_data); -} - void finish_all_active_slots(void) { struct active_request_slot *slot = active_queue_head; @@ -828,7 +1298,7 @@ void append_remote_object_url(struct strbuf *buf, const char *url, strbuf_addf(buf, "objects/%.*s/", 2, hex); if (!only_two_digit_prefix) - strbuf_addf(buf, "%s", hex+2); + strbuf_addstr(buf, hex + 2); } char *get_remote_object_url(const char *url, const char *hex, @@ -839,15 +1309,18 @@ char *get_remote_object_url(const char *url, const char *hex, return strbuf_detach(&buf, NULL); } -int handle_curl_result(struct slot_results *results) +static int handle_curl_result(struct slot_results *results) { /* * If we see a failing http code with CURLE_OK, we have turned off * FAILONERROR (to keep the server's custom error response), and should * translate the code into failure here. + * + * Likewise, if we see a redirect (30x code), that means we turned off + * redirect-following, and we should treat the result as an error. */ if (results->curl_result == CURLE_OK && - results->http_code >= 400) { + results->http_code >= 300) { results->curl_result = CURLE_HTTP_RETURNED_ERROR; /* * Normally curl will already have put the "reason phrase" @@ -862,6 +1335,8 @@ int handle_curl_result(struct slot_results *results) if (results->curl_result == CURLE_OK) { credential_approve(&http_auth); + if (proxy_auth.password) + credential_approve(&proxy_auth); return HTTP_OK; } else if (missing_target(results)) return HTTP_MISSING_TARGET; @@ -870,9 +1345,14 @@ int handle_curl_result(struct slot_results *results) credential_reject(&http_auth); return HTTP_NOAUTH; } else { +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY + http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE; +#endif return HTTP_REAUTH; } } else { + if (results->http_connectcode == 407) + credential_reject(&proxy_auth); #if LIBCURL_VERSION_NUM >= 0x070c00 if (!curl_errorstr[0]) strlcpy(curl_errorstr, @@ -897,6 +1377,16 @@ int run_one_slot(struct active_request_slot *slot, return handle_curl_result(results); } +struct curl_slist *http_copy_default_headers(void) +{ + struct curl_slist *headers = NULL, *h; + + for (h = extra_http_headers; h; h = h->next) + headers = curl_slist_append(headers, h->data); + + return headers; +} + static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf) { char *ptr; @@ -986,6 +1476,124 @@ static void extract_content_type(struct strbuf *raw, struct strbuf *type, strbuf_addstr(charset, "ISO-8859-1"); } +static void write_accept_language(struct strbuf *buf) +{ + /* + * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than + * that, q-value will be smaller than 0.001, the minimum q-value the + * HTTP specification allows. See + * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value. + */ + const int MAX_DECIMAL_PLACES = 3; + const int MAX_LANGUAGE_TAGS = 1000; + const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000; + char **language_tags = NULL; + int num_langs = 0; + const char *s = get_preferred_languages(); + int i; + struct strbuf tag = STRBUF_INIT; + + /* Don't add Accept-Language header if no language is preferred. */ + if (!s) + return; + + /* + * Split the colon-separated string of preferred languages into + * language_tags array. + */ + do { + /* collect language tag */ + for (; *s && (isalnum(*s) || *s == '_'); s++) + strbuf_addch(&tag, *s == '_' ? '-' : *s); + + /* skip .codeset, @modifier and any other unnecessary parts */ + while (*s && *s != ':') + s++; + + if (tag.len) { + num_langs++; + REALLOC_ARRAY(language_tags, num_langs); + language_tags[num_langs - 1] = strbuf_detach(&tag, NULL); + if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */ + break; + } + } while (*s++); + + /* write Accept-Language header into buf */ + if (num_langs) { + int last_buf_len = 0; + int max_q; + int decimal_places; + char q_format[32]; + + /* add '*' */ + REALLOC_ARRAY(language_tags, num_langs + 1); + language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */ + + /* compute decimal_places */ + for (max_q = 1, decimal_places = 0; + max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES; + decimal_places++, max_q *= 10) + ; + + xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places); + + strbuf_addstr(buf, "Accept-Language: "); + + for (i = 0; i < num_langs; i++) { + if (i > 0) + strbuf_addstr(buf, ", "); + + strbuf_addstr(buf, language_tags[i]); + + if (i > 0) + strbuf_addf(buf, q_format, max_q - i); + + if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) { + strbuf_remove(buf, last_buf_len, buf->len - last_buf_len); + break; + } + + last_buf_len = buf->len; + } + } + + /* free language tags -- last one is a static '*' */ + for (i = 0; i < num_langs - 1; i++) + free(language_tags[i]); + free(language_tags); +} + +/* + * Get an Accept-Language header which indicates user's preferred languages. + * + * Examples: + * LANGUAGE= -> "" + * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1" + * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1" + * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1" + * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1" + * LANGUAGE= LANG=C -> "" + */ +static const char *get_accept_language(void) +{ + if (!cached_accept_language) { + struct strbuf buf = STRBUF_INIT; + write_accept_language(&buf); + if (buf.len > 0) + cached_accept_language = strbuf_detach(&buf, NULL); + } + + return cached_accept_language; +} + +static void http_opt_request_remainder(CURL *curl, off_t pos) +{ + char buf[128]; + xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos); + curl_easy_setopt(curl, CURLOPT_RANGE, buf); +} + /* http_request() targets */ #define HTTP_REQUEST_STRBUF 0 #define HTTP_REQUEST_FILE 1 @@ -996,8 +1604,9 @@ static int http_request(const char *url, { struct active_request_slot *slot; struct slot_results results; - struct curl_slist *headers = NULL; + struct curl_slist *headers = http_copy_default_headers(); struct strbuf buf = STRBUF_INIT; + const char *accept_language; int ret; slot = get_active_slot(); @@ -1010,24 +1619,29 @@ static int http_request(const char *url, curl_easy_setopt(slot->curl, CURLOPT_FILE, result); if (target == HTTP_REQUEST_FILE) { - long posn = ftell(result); + off_t posn = ftello(result); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); - if (posn > 0) { - strbuf_addf(&buf, "Range: bytes=%ld-", posn); - headers = curl_slist_append(headers, buf.buf); - strbuf_reset(&buf); - } + if (posn > 0) + http_opt_request_remainder(slot->curl, posn); } else curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); } + accept_language = get_accept_language(); + + if (accept_language) + headers = curl_slist_append(headers, accept_language); + strbuf_addstr(&buf, "Pragma:"); if (options && options->no_cache) strbuf_addstr(&buf, " no-cache"); if (options && options->keep_error) curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); + if (options && options->initial_request && + http_follow_config == HTTP_FOLLOW_INITIAL) + curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1); headers = curl_slist_append(headers, buf.buf); @@ -1076,16 +1690,16 @@ static int http_request(const char *url, * * Note that this assumes a sane redirect scheme. It's entirely possible * in the example above to end up at a URL that does not even end in - * "info/refs". In such a case we simply punt, as there is not much we can - * do (and such a scheme is unlikely to represent a real git repository, - * which means we are likely about to abort anyway). + * "info/refs". In such a case we die. There's not much we can do, such a + * scheme is unlikely to represent a real git repository, and failing to + * rewrite the base opens options for malicious redirects to do funny things. */ static int update_url_from_redirect(struct strbuf *base, const char *asked, const struct strbuf *got) { const char *tail; - size_t tail_len; + size_t new_len; if (!strcmp(asked, got->buf)) return 0; @@ -1094,14 +1708,16 @@ static int update_url_from_redirect(struct strbuf *base, die("BUG: update_url_from_redirect: %s is not a superset of %s", asked, base->buf); - tail_len = strlen(tail); - - if (got->len < tail_len || - strcmp(tail, got->buf + got->len - tail_len)) - return 0; /* insane redirect scheme */ + new_len = got->len; + if (!strip_suffix_mem(got->buf, &new_len, tail)) + die(_("unable to update url base from redirection:\n" + " asked for: %s\n" + " redirect: %s"), + asked, got->buf); strbuf_reset(base); - strbuf_add(base, got->buf, got->len - tail_len); + strbuf_add(base, got->buf, new_len); + return 1; } @@ -1174,7 +1790,7 @@ static int http_get_file(const char *url, const char *filename, ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options); fclose(result); - if (ret == HTTP_OK && move_temp_to_file(tmpfile.buf, filename)) + if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename)) ret = HTTP_ERROR; cleanup: strbuf_release(&tmpfile); @@ -1194,7 +1810,7 @@ int http_fetch_ref(const char *base, struct ref *ref) if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) { strbuf_rtrim(&buffer); if (buffer.len == 40) - ret = get_sha1_hex(buffer.buf, ref->old_sha1); + ret = get_oid_hex(buffer.buf, &ref->old_oid); else if (starts_with(buffer.buf, "ref: ")) { ref->symref = xstrdup(buffer.buf + 5); ret = 0; @@ -1240,7 +1856,7 @@ static int fetch_and_setup_pack_index(struct packed_git **packs_head, int ret; if (has_pack_index(sha1)) { - new_pack = parse_pack_index(sha1, NULL); + new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1)); if (!new_pack) return -1; /* parse_pack_index() already issued error message */ goto add_pack; @@ -1261,7 +1877,7 @@ static int fetch_and_setup_pack_index(struct packed_git **packs_head, ret = verify_pack_index(new_pack); if (!ret) { close_pack_index(new_pack); - ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1)); + ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1)); } free(tmp_idx); if (ret) @@ -1322,12 +1938,9 @@ void release_http_pack_request(struct http_pack_request *preq) fclose(preq->packfile); preq->packfile = NULL; } - if (preq->range_header != NULL) { - curl_slist_free_all(preq->range_header); - preq->range_header = NULL; - } preq->slot = NULL; free(preq->url); + free(preq); } int finish_http_pack_request(struct http_pack_request *preq) @@ -1335,6 +1948,7 @@ int finish_http_pack_request(struct http_pack_request *preq) struct packed_git **lst; struct packed_git *p = preq->target; char *tmp_idx; + size_t len; struct child_process ip = CHILD_PROCESS_INIT; const char *ip_argv[8]; @@ -1348,9 +1962,9 @@ int finish_http_pack_request(struct http_pack_request *preq) lst = &((*lst)->next); *lst = (*lst)->next; - tmp_idx = xstrdup(preq->tmpfile); - strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"), - ".idx.temp"); + if (!strip_suffix(preq->tmpfile, ".pack.temp", &len)) + die("BUG: pack tmpfile does not end in .pack.temp?"); + tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile); ip_argv[0] = "index-pack"; ip_argv[1] = "-o"; @@ -1372,8 +1986,8 @@ int finish_http_pack_request(struct http_pack_request *preq) unlink(sha1_pack_index_name(p->sha1)); - if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1)) - || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) { + if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1)) + || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) { free(tmp_idx); return -1; } @@ -1386,8 +2000,7 @@ int finish_http_pack_request(struct http_pack_request *preq) struct http_pack_request *new_http_pack_request( struct packed_git *target, const char *base_url) { - long prev_posn = 0; - char range[RANGE_HEADER_SIZE]; + off_t prev_posn = 0; struct strbuf buf = STRBUF_INIT; struct http_pack_request *preq; @@ -1419,16 +2032,13 @@ struct http_pack_request *new_http_pack_request( * If there is data present from a previous transfer attempt, * resume where it left off */ - prev_posn = ftell(preq->packfile); + prev_posn = ftello(preq->packfile); if (prev_posn>0) { if (http_is_verbose) fprintf(stderr, - "Resuming fetch of pack %s at byte %ld\n", - sha1_to_hex(target->sha1), prev_posn); - sprintf(range, "Range: bytes=%ld-", prev_posn); - preq->range_header = curl_slist_append(NULL, range); - curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, - preq->range_header); + "Resuming fetch of pack %s at byte %"PRIuMAX"\n", + sha1_to_hex(target->sha1), (uintmax_t)prev_posn); + http_opt_request_remainder(preq->slot->curl, prev_posn); } return preq; @@ -1446,8 +2056,19 @@ static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb, unsigned char expn[4096]; size_t size = eltsize * nmemb; int posn = 0; - struct http_object_request *freq = - (struct http_object_request *)data; + struct http_object_request *freq = data; + struct active_request_slot *slot = freq->slot; + + if (slot) { + CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, + &slot->http_code); + if (c != CURLE_OK) + die("BUG: curl_easy_getinfo for HTTP code failed: %s", + curl_easy_strerror(c)); + if (slot->http_code >= 300) + return size; + } + do { ssize_t retval = xwrite(freq->localfile, (char *) ptr + posn, size - posn); @@ -1477,9 +2098,7 @@ struct http_object_request *new_http_object_request(const char *base_url, int prevlocal; char prev_buf[PREV_BUF_SIZE]; ssize_t prev_read = 0; - long prev_posn = 0; - char range[RANGE_HEADER_SIZE]; - struct curl_slist *range_header = NULL; + off_t prev_posn = 0; struct http_object_request *freq; freq = xcalloc(1, sizeof(*freq)); @@ -1515,8 +2134,7 @@ struct http_object_request *new_http_object_request(const char *base_url, } if (freq->localfile < 0) { - error("Couldn't create temporary file %s: %s", - freq->tmpfile, strerror(errno)); + error_errno("Couldn't create temporary file %s", freq->tmpfile); goto abort; } @@ -1561,8 +2179,8 @@ struct http_object_request *new_http_object_request(const char *base_url, prev_posn = 0; lseek(freq->localfile, 0, SEEK_SET); if (ftruncate(freq->localfile, 0) < 0) { - error("Couldn't truncate temporary file %s: %s", - freq->tmpfile, strerror(errno)); + error_errno("Couldn't truncate temporary file %s", + freq->tmpfile); goto abort; } } @@ -1571,6 +2189,7 @@ struct http_object_request *new_http_object_request(const char *base_url, freq->slot = get_active_slot(); curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq); + curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0); curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr); curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url); @@ -1583,12 +2202,9 @@ struct http_object_request *new_http_object_request(const char *base_url, if (prev_posn>0) { if (http_is_verbose) fprintf(stderr, - "Resuming fetch of object %s at byte %ld\n", - hex, prev_posn); - sprintf(range, "Range: bytes=%ld-", prev_posn); - range_header = curl_slist_append(range_header, range); - curl_easy_setopt(freq->slot->curl, - CURLOPT_HTTPHEADER, range_header); + "Resuming fetch of object %s at byte %"PRIuMAX"\n", + hex, (uintmax_t)prev_posn); + http_opt_request_remainder(freq->slot->curl, prev_posn); } return freq; @@ -1637,7 +2253,7 @@ int finish_http_object_request(struct http_object_request *freq) return -1; } freq->rename = - move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1)); + finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1)); return freq->rename; } |