diff options
Diffstat (limited to 'common/http.c')
| -rw-r--r-- | common/http.c | 2777 |
1 files changed, 0 insertions, 2777 deletions
diff --git a/common/http.c b/common/http.c deleted file mode 100644 index edd8a6d27..000000000 --- a/common/http.c +++ /dev/null @@ -1,2777 +0,0 @@ -/* http.c - HTTP protocol handler - * Copyright (C) 1999, 2001, 2002, 2003, 2004, 2006, 2009, 2010, - * 2011 Free Software Foundation, Inc. - * Copyright (C) 2014 Werner Koch - * Copyright (C) 2015 g10 Code GmbH - * - * This file is part of GnuPG. - * - * This file is free software; you can redistribute it and/or modify - * it under the terms of either - * - * - the GNU Lesser General Public License as published by the Free - * Software Foundation; either version 3 of the License, or (at - * your option) any later version. - * - * or - * - * - the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * or both in parallel, as here. - * - * This file is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. - */ - -/* Simple HTTP client implementation. We try to keep the code as - self-contained as possible. There are some contraints however: - - - estream is required. We now require estream because it provides a - very useful and portable asprintf implementation and the fopencookie - function. - - stpcpy is required - - fixme: list other requirements. - - - - With HTTP_USE_NTBTLS or HTTP_USE_GNUTLS support for https is - provided (this also requires estream). - - - With HTTP_NO_WSASTARTUP the socket initialization is not done - under Windows. This is useful if the socket layer has already - been initialized elsewhere. This also avoids the installation of - an exit handler to cleanup the socket layer. -*/ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> -#include <string.h> -#include <ctype.h> -#include <errno.h> -#include <unistd.h> - -#ifdef HAVE_W32_SYSTEM -# ifdef HAVE_WINSOCK2_H -# include <winsock2.h> -# endif -# include <windows.h> -#else /*!HAVE_W32_SYSTEM*/ -# include <sys/types.h> -# include <sys/socket.h> -# include <sys/time.h> -# include <time.h> -# include <netinet/in.h> -# include <arpa/inet.h> -# include <netdb.h> -#endif /*!HAVE_W32_SYSTEM*/ - -#ifdef WITHOUT_NPTH /* Give the Makefile a chance to build without Pth. */ -# undef USE_NPTH -#endif - -#ifdef USE_NPTH -# include <npth.h> -#endif - -#if defined (HTTP_USE_GNUTLS) && defined (HTTP_USE_NTBTLS) -# error Both, HTTP_USE_GNUTLS and HTTP_USE_NTBTLS, are defined. -#endif - -#ifdef HTTP_USE_NTBTLS -# include <ntbtls.h> -#elif HTTP_USE_GNUTLS -# include <gnutls/gnutls.h> -# include <gnutls/x509.h> -#endif /*HTTP_USE_GNUTLS*/ - - -#include "util.h" -#include "i18n.h" -#include "http.h" -#ifdef USE_DNS_SRV -# include "srv.h" -#else /*!USE_DNS_SRV*/ - /* If we are not compiling with SRV record support we provide stub - data structures. */ -# ifndef MAXDNAME -# define MAXDNAME 1025 -# endif -struct srventry -{ - unsigned short priority; - unsigned short weight; - unsigned short port; - int run_count; - char target[MAXDNAME]; -}; -#endif/*!USE_DNS_SRV*/ - - -#ifdef USE_NPTH -# define my_select(a,b,c,d,e) npth_select ((a), (b), (c), (d), (e)) -# define my_connect(a,b,c) npth_connect ((a), (b), (c)) -# define my_accept(a,b,c) npth_accept ((a), (b), (c)) -#else -# define my_select(a,b,c,d,e) select ((a), (b), (c), (d), (e)) -# define my_connect(a,b,c) connect ((a), (b), (c)) -# define my_accept(a,b,c) accept ((a), (b), (c)) -#endif - -#ifdef HAVE_W32_SYSTEM -#define sock_close(a) closesocket(a) -#else -#define sock_close(a) close(a) -#endif - -#ifndef EAGAIN -#define EAGAIN EWOULDBLOCK -#endif -#ifndef INADDR_NONE /* Slowaris is missing that. */ -#define INADDR_NONE ((unsigned long)(-1)) -#endif /*INADDR_NONE*/ - -#define HTTP_PROXY_ENV "http_proxy" -#define MAX_LINELEN 20000 /* Max. length of a HTTP header line. */ -#define VALID_URI_CHARS "abcdefghijklmnopqrstuvwxyz" \ - "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \ - "01234567890@" \ - "!\"#$%&'()*+,-./:;<=>?[\\]^_{|}~" - -/* A long counter type. */ -#ifdef HAVE_STRTOULL -typedef unsigned long long longcounter_t; -# define counter_strtoul(a) strtoull ((a), NULL, 10) -#else -typedef unsigned long longcounter_t; -# define counter_strtoul(a) strtoul ((a), NULL, 10) -#endif - -#if HTTP_USE_NTBTLS -typedef ntbtls_t tls_session_t; -# define USE_TLS 1 -#elif HTTP_USE_GNUTLS -typedef gnutls_session_t tls_session_t; -# define USE_TLS 1 -#else -typedef void *tls_session_t; -# undef USE_TLS -#endif - -static gpg_err_code_t do_parse_uri (parsed_uri_t uri, int only_local_part, - int no_scheme_check, int force_tls); -static gpg_error_t parse_uri (parsed_uri_t *ret_uri, const char *uri, - int no_scheme_check, int force_tls); -static int remove_escapes (char *string); -static int insert_escapes (char *buffer, const char *string, - const char *special); -static uri_tuple_t parse_tuple (char *string); -static gpg_error_t send_request (http_t hd, const char *httphost, - const char *auth,const char *proxy, - const char *srvtag,strlist_t headers); -static char *build_rel_path (parsed_uri_t uri); -static gpg_error_t parse_response (http_t hd); - -static int connect_server (const char *server, unsigned short port, - unsigned int flags, const char *srvtag, - int *r_host_not_found); -static gpg_error_t write_server (int sock, const char *data, size_t length); - -static ssize_t cookie_read (void *cookie, void *buffer, size_t size); -static ssize_t cookie_write (void *cookie, const void *buffer, size_t size); -static int cookie_close (void *cookie); - - -/* A socket object used to a allow ref counting of sockets. */ -struct my_socket_s -{ - int fd; /* The actual socket - shall never be -1. */ - int refcount; /* Number of references to this socket. */ -}; -typedef struct my_socket_s *my_socket_t; - - -/* Cookie function structure and cookie object. */ -static es_cookie_io_functions_t cookie_functions = - { - cookie_read, - cookie_write, - NULL, - cookie_close - }; - -struct cookie_s -{ - /* Socket object or NULL if already closed. */ - my_socket_t sock; - - /* The session object or NULL if not used. */ - http_session_t session; - - /* True if TLS is to be used. */ - int use_tls; - - /* The remaining content length and a flag telling whether to use - the content length. */ - longcounter_t content_length; - unsigned int content_length_valid:1; -}; -typedef struct cookie_s *cookie_t; - -/* The session object. */ -struct http_session_s -{ - int refcount; /* Number of references to this object. */ -#ifdef HTTP_USE_GNUTLS - gnutls_certificate_credentials_t certcred; -#endif /*HTTP_USE_GNUTLS*/ -#ifdef USE_TLS - tls_session_t tls_session; - struct { - int done; /* Verifciation has been done. */ - int rc; /* TLS verification return code. */ - unsigned int status; /* Verification status. */ - } verify; - char *servername; /* Malloced server name. */ -#endif /*USE_TLS*/ - /* A callback function to log details of TLS certifciates. */ - void (*cert_log_cb) (http_session_t, gpg_error_t, const char *, - const void **, size_t *); -}; - - -/* An object to save header lines. */ -struct header_s -{ - struct header_s *next; - char *value; /* The value of the header (malloced). */ - char name[1]; /* The name of the header (canonicalized). */ -}; -typedef struct header_s *header_t; - - -/* Our handle context. */ -struct http_context_s -{ - unsigned int status_code; - my_socket_t sock; - unsigned int in_data:1; - unsigned int is_http_0_9:1; - estream_t fp_read; - estream_t fp_write; - void *write_cookie; - void *read_cookie; - http_session_t session; - parsed_uri_t uri; - http_req_t req_type; - char *buffer; /* Line buffer. */ - size_t buffer_size; - unsigned int flags; - header_t headers; /* Received headers. */ -}; - - -/* The global callback for the verification fucntion. */ -static gpg_error_t (*tls_callback) (http_t, http_session_t, int); - -/* The list of files with trusted CA certificates. */ -static strlist_t tls_ca_certlist; - - - -#if defined(HAVE_W32_SYSTEM) && !defined(HTTP_NO_WSASTARTUP) - -#if GNUPG_MAJOR_VERSION == 1 -#define REQ_WINSOCK_MAJOR 1 -#define REQ_WINSOCK_MINOR 1 -#else -#define REQ_WINSOCK_MAJOR 2 -#define REQ_WINSOCK_MINOR 2 -#endif - - -static void -deinit_sockets (void) -{ - WSACleanup(); -} - -static void -init_sockets (void) -{ - static int initialized; - static WSADATA wsdata; - - if (initialized) - return; - - if ( WSAStartup( MAKEWORD (REQ_WINSOCK_MINOR, REQ_WINSOCK_MAJOR), &wsdata ) ) - { - log_error ("error initializing socket library: ec=%d\n", - (int)WSAGetLastError () ); - return; - } - if ( LOBYTE(wsdata.wVersion) != REQ_WINSOCK_MAJOR - || HIBYTE(wsdata.wVersion) != REQ_WINSOCK_MINOR ) - { - log_error ("socket library version is %x.%x - but %d.%d needed\n", - LOBYTE(wsdata.wVersion), HIBYTE(wsdata.wVersion), - REQ_WINSOCK_MAJOR, REQ_WINSOCK_MINOR); - WSACleanup(); - return; - } - atexit ( deinit_sockets ); - initialized = 1; -} -#endif /*HAVE_W32_SYSTEM && !HTTP_NO_WSASTARTUP*/ - - -/* Create a new socket object. Returns NULL and closes FD if not - enough memory is available. */ -static my_socket_t -_my_socket_new (int lnr, int fd) -{ - my_socket_t so; - - so = xtrymalloc (sizeof *so); - if (!so) - { - int save_errno = errno; - sock_close (fd); - gpg_err_set_errno (save_errno); - return NULL; - } - so->fd = fd; - so->refcount = 1; - /* log_debug ("http.c:socket_new(%d): object %p for fd %d created\n", */ - /* lnr, so, so->fd); */ - (void)lnr; - return so; -} -#define my_socket_new(a) _my_socket_new (__LINE__, (a)) - -/* Bump up the reference counter for the socket object SO. */ -static my_socket_t -_my_socket_ref (int lnr, my_socket_t so) -{ - so->refcount++; - /* log_debug ("http.c:socket_ref(%d) object %p for fd %d refcount now %d\n", */ - /* lnr, so, so->fd, so->refcount); */ - (void)lnr; - return so; -} -#define my_socket_ref(a) _my_socket_ref (__LINE__,(a)) - - -/* Bump down the reference counter for the socket object SO. If SO - has no more references, close the socket and release the - object. */ -static void -_my_socket_unref (int lnr, my_socket_t so, - void (*preclose)(void*), void *preclosearg) -{ - if (so) - { - so->refcount--; - /* log_debug ("http.c:socket_unref(%d): object %p for fd %d ref now %d\n", */ - /* lnr, so, so->fd, so->refcount); */ - (void)lnr; - if (!so->refcount) - { - if (preclose) - preclose (preclosearg); - sock_close (so->fd); - xfree (so); - } - } -} -#define my_socket_unref(a,b,c) _my_socket_unref (__LINE__,(a),(b),(c)) - - -#if defined (USE_NPTH) && defined(HTTP_USE_GNUTLS) -static ssize_t -my_npth_read (gnutls_transport_ptr_t ptr, void *buffer, size_t size) -{ - my_socket_t sock = ptr; - return npth_read (sock->fd, buffer, size); -} -static ssize_t -my_npth_write (gnutls_transport_ptr_t ptr, const void *buffer, size_t size) -{ - my_socket_t sock = ptr; - return npth_write (sock->fd, buffer, size); -} -#endif /*USE_NPTH && HTTP_USE_GNUTLS*/ - - - - -/* This notification function is called by estream whenever stream is - closed. Its purpose is to mark the closing in the handle so - that a http_close won't accidentally close the estream. The function - http_close removes this notification so that it won't be called if - http_close was used before an es_fclose. */ -static void -fp_onclose_notification (estream_t stream, void *opaque) -{ - http_t hd = opaque; - - if (hd->fp_read && hd->fp_read == stream) - hd->fp_read = NULL; - else if (hd->fp_write && hd->fp_write == stream) - hd->fp_write = NULL; -} - - -/* - * Helper function to create an HTTP header with hex encoded data. A - * new buffer is returned. This buffer is the concatenation of the - * string PREFIX, the hex-encoded DATA of length LEN and the string - * SUFFIX. On error NULL is returned and ERRNO set. - */ -static char * -make_header_line (const char *prefix, const char *suffix, - const void *data, size_t len ) -{ - static unsigned char bintoasc[] = - "ABCDEFGHIJKLMNOPQRSTUVWXYZ" - "abcdefghijklmnopqrstuvwxyz" - "0123456789+/"; - const unsigned char *s = data; - char *buffer, *p; - - buffer = xtrymalloc (strlen (prefix) + (len+2)/3*4 + strlen (suffix) + 1); - if (!buffer) - return NULL; - p = stpcpy (buffer, prefix); - for ( ; len >= 3 ; len -= 3, s += 3 ) - { - *p++ = bintoasc[(s[0] >> 2) & 077]; - *p++ = bintoasc[(((s[0] <<4)&060)|((s[1] >> 4)&017))&077]; - *p++ = bintoasc[(((s[1]<<2)&074)|((s[2]>>6)&03))&077]; - *p++ = bintoasc[s[2]&077]; - *p = 0; - } - if ( len == 2 ) - { - *p++ = bintoasc[(s[0] >> 2) & 077]; - *p++ = bintoasc[(((s[0] <<4)&060)|((s[1] >> 4)&017))&077]; - *p++ = bintoasc[((s[1]<<2)&074)]; - *p++ = '='; - } - else if ( len == 1 ) - { - *p++ = bintoasc[(s[0] >> 2) & 077]; - *p++ = bintoasc[(s[0] <<4)&060]; - *p++ = '='; - *p++ = '='; - } - *p = 0; - strcpy (p, suffix); - return buffer; -} - - - - -/* Register a non-standard global TLS callback function. If no - verification is desired a callback needs to be registered which - always returns NULL. */ -void -http_register_tls_callback (gpg_error_t (*cb)(http_t, http_session_t, int)) -{ - tls_callback = cb; -} - - -/* Register a CA certificate for future use. The certificate is - expected to be in FNAME. PEM format is assume if FNAME has a - suffix of ".pem". If FNAME is NULL the list of CA files is - removed. */ -void -http_register_tls_ca (const char *fname) -{ - strlist_t sl; - - if (!fname) - { - free_strlist (tls_ca_certlist); - tls_ca_certlist = NULL; - } - else - { - sl = add_to_strlist (&tls_ca_certlist, fname); - if (*sl->d && !strcmp (sl->d + strlen (sl->d) - 4, ".pem")) - sl->flags = 1; - } -} - - -/* Release a session. Take care not to release it while it is being - used by a http context object. */ -static void -session_unref (int lnr, http_session_t sess) -{ - if (!sess) - return; - - sess->refcount--; - /* log_debug ("http.c:session_unref(%d): sess %p ref now %d\n", */ - /* lnr, sess, sess->refcount); */ - (void)lnr; - if (sess->refcount) - return; - -#ifdef USE_TLS -# ifdef HTTP_USE_GNUTLS - if (sess->tls_session) - { - my_socket_t sock = gnutls_transport_get_ptr (sess->tls_session); - my_socket_unref (sock, NULL, NULL); - gnutls_deinit (sess->tls_session); - } - if (sess->certcred) - gnutls_certificate_free_credentials (sess->certcred); -# endif /*HTTP_USE_GNUTLS*/ - xfree (sess->servername); -#endif /*USE_TLS*/ - - xfree (sess); -} -#define http_session_unref(a) session_unref (__LINE__, (a)) - -void -http_session_release (http_session_t sess) -{ - http_session_unref (sess); -} - - -/* Create a new session object which is currently used to enable TLS - support. It may eventually allow reusing existing connections. */ -gpg_error_t -http_session_new (http_session_t *r_session, const char *tls_priority) -{ - gpg_error_t err; - http_session_t sess; - - *r_session = NULL; - - sess = xtrycalloc (1, sizeof *sess); - if (!sess) - return gpg_error_from_syserror (); - sess->refcount = 1; - -#if HTTP_USE_NTBTLS - { - (void)tls_priority; - - err = ntbtls_new (&sess->tls_session, NTBTLS_CLIENT); - if (err) - { - log_error ("ntbtls_new failed: %s\n", gpg_strerror (err)); - goto leave; - } - } -#elif HTTP_USE_GNUTLS - { - const char *errpos; - int rc; - strlist_t sl; - - rc = gnutls_certificate_allocate_credentials (&sess->certcred); - if (rc < 0) - { - log_error ("gnutls_certificate_allocate_credentials failed: %s\n", - gnutls_strerror (rc)); - err = gpg_error (GPG_ERR_GENERAL); - goto leave; - } - - for (sl = tls_ca_certlist; sl; sl = sl->next) - { - rc = gnutls_certificate_set_x509_trust_file - (sess->certcred, sl->d, - (sl->flags & 1)? GNUTLS_X509_FMT_PEM : GNUTLS_X509_FMT_DER); - if (rc < 0) - log_info ("setting CA from file '%s' failed: %s\n", - sl->d, gnutls_strerror (rc)); - } - - rc = gnutls_init (&sess->tls_session, GNUTLS_CLIENT); - if (rc < 0) - { - log_error ("gnutls_init failed: %s\n", gnutls_strerror (rc)); - err = gpg_error (GPG_ERR_GENERAL); - goto leave; - } - /* A new session has the transport ptr set to (void*(-1), we need - it to be NULL. */ - gnutls_transport_set_ptr (sess->tls_session, NULL); - - rc = gnutls_priority_set_direct (sess->tls_session, - tls_priority? tls_priority : "NORMAL", - &errpos); - if (rc < 0) - { - log_error ("gnutls_priority_set_direct failed at '%s': %s\n", - errpos, gnutls_strerror (rc)); - err = gpg_error (GPG_ERR_GENERAL); - goto leave; - } - - rc = gnutls_credentials_set (sess->tls_session, - GNUTLS_CRD_CERTIFICATE, sess->certcred); - if (rc < 0) - { - log_error ("gnutls_credentials_set failed: %s\n", gnutls_strerror (rc)); - err = gpg_error (GPG_ERR_GENERAL); - goto leave; - } - } -#else /*!HTTP_USE_GNUTLS*/ - { - (void)tls_priority; - } -#endif /*!HTTP_USE_GNUTLS*/ - - /* log_debug ("http.c:session_new: sess %p created\n", sess); */ - err = 0; - -#if USE_TLS - leave: -#endif /*USE_TLS*/ - if (err) - http_session_unref (sess); - else - *r_session = sess; - - return err; -} - - -/* Increment the reference count for session SESS. Passing NULL for - SESS is allowed. */ -http_session_t -http_session_ref (http_session_t sess) -{ - if (sess) - { - sess->refcount++; - /* log_debug ("http.c:session_ref: sess %p ref now %d\n", sess, */ - /* sess->refcount); */ - } - return sess; -} - - -void -http_session_set_log_cb (http_session_t sess, - void (*cb)(http_session_t, gpg_error_t, - const char *hostname, - const void **certs, size_t *certlens)) -{ - sess->cert_log_cb = cb; -} - - - - -/* Start a HTTP retrieval and on success store at R_HD a context - pointer for completing the request and to wait for the response. - If HTTPHOST is not NULL it is used hor the Host header instead of a - Host header derived from the URL. */ -gpg_error_t -http_open (http_t *r_hd, http_req_t reqtype, const char *url, - const char *httphost, - const char *auth, unsigned int flags, const char *proxy, - http_session_t session, const char *srvtag, strlist_t headers) -{ - gpg_error_t err; - http_t hd; - - *r_hd = NULL; - - if (!(reqtype == HTTP_REQ_GET || reqtype == HTTP_REQ_POST)) - return gpg_err_make (default_errsource, GPG_ERR_INV_ARG); - - /* Create the handle. */ - hd = xtrycalloc (1, sizeof *hd); - if (!hd) - return gpg_error_from_syserror (); - hd->req_type = reqtype; - hd->flags = flags; - hd->session = http_session_ref (session); - - err = parse_uri (&hd->uri, url, 0, !!(flags & HTTP_FLAG_FORCE_TLS)); - if (!err) - err = send_request (hd, httphost, auth, proxy, srvtag, headers); - - if (err) - { - my_socket_unref (hd->sock, NULL, NULL); - if (hd->fp_read) - es_fclose (hd->fp_read); - if (hd->fp_write) - es_fclose (hd->fp_write); - http_session_unref (hd->session); - xfree (hd); - } - else - *r_hd = hd; - return err; -} - - -/* This function is useful to connect to a generic TCP service using - this http abstraction layer. This has the advantage of providing - service tags and an estream interface. */ -gpg_error_t -http_raw_connect (http_t *r_hd, const char *server, unsigned short port, - unsigned int flags, const char *srvtag) -{ - gpg_error_t err = 0; - int sock; - http_t hd; - cookie_t cookie; - int hnf; - - *r_hd = NULL; - - if ((flags & HTTP_FLAG_FORCE_TOR)) - { - log_error ("TOR support is not yet available\n"); - return gpg_err_make (default_errsource, GPG_ERR_NOT_IMPLEMENTED); - } - - /* Create the handle. */ - hd = xtrycalloc (1, sizeof *hd); - if (!hd) - return gpg_error_from_syserror (); - hd->req_type = HTTP_REQ_OPAQUE; - hd->flags = flags; - - /* Connect. */ - sock = connect_server (server, port, hd->flags, srvtag, &hnf); - if (sock == -1) - { - err = gpg_err_make (default_errsource, - (hnf? GPG_ERR_UNKNOWN_HOST - : gpg_err_code_from_syserror ())); - xfree (hd); - return err; - } - hd->sock = my_socket_new (sock); - if (!hd->sock) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - xfree (hd); - return err; - } - - /* Setup estreams for reading and writing. */ - cookie = xtrycalloc (1, sizeof *cookie); - if (!cookie) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - goto leave; - } - cookie->sock = my_socket_ref (hd->sock); - hd->fp_write = es_fopencookie (cookie, "w", cookie_functions); - if (!hd->fp_write) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - my_socket_unref (cookie->sock, NULL, NULL); - xfree (cookie); - goto leave; - } - hd->write_cookie = cookie; /* Cookie now owned by FP_WRITE. */ - - cookie = xtrycalloc (1, sizeof *cookie); - if (!cookie) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - goto leave; - } - cookie->sock = my_socket_ref (hd->sock); - hd->fp_read = es_fopencookie (cookie, "r", cookie_functions); - if (!hd->fp_read) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - my_socket_unref (cookie->sock, NULL, NULL); - xfree (cookie); - goto leave; - } - hd->read_cookie = cookie; /* Cookie now owned by FP_READ. */ - - /* Register close notification to interlock the use of es_fclose in - http_close and in user code. */ - err = es_onclose (hd->fp_write, 1, fp_onclose_notification, hd); - if (!err) - err = es_onclose (hd->fp_read, 1, fp_onclose_notification, hd); - - leave: - if (err) - { - if (hd->fp_read) - es_fclose (hd->fp_read); - if (hd->fp_write) - es_fclose (hd->fp_write); - my_socket_unref (hd->sock, NULL, NULL); - xfree (hd); - } - else - *r_hd = hd; - return err; -} - - - - -void -http_start_data (http_t hd) -{ - if (!hd->in_data) - { - es_fputs ("\r\n", hd->fp_write); - es_fflush (hd->fp_write); - hd->in_data = 1; - } - else - es_fflush (hd->fp_write); -} - - -gpg_error_t -http_wait_response (http_t hd) -{ - gpg_error_t err; - cookie_t cookie; - - /* Make sure that we are in the data. */ - http_start_data (hd); - - /* Close the write stream. Note that the reference counted socket - object keeps the actual system socket open. */ - cookie = hd->write_cookie; - if (!cookie) - return gpg_err_make (default_errsource, GPG_ERR_INTERNAL); - - es_fclose (hd->fp_write); - hd->fp_write = NULL; - /* The close has released the cookie and thus we better set it to NULL. */ - hd->write_cookie = NULL; - - /* Shutdown one end of the socket is desired. As per HTTP/1.0 this - is not required but some very old servers (e.g. the original pksd - key server didn't worked without it. */ - if ((hd->flags & HTTP_FLAG_SHUTDOWN)) - shutdown (hd->sock->fd, 1); - hd->in_data = 0; - - /* Create a new cookie and a stream for reading. */ - cookie = xtrycalloc (1, sizeof *cookie); - if (!cookie) - return gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - cookie->sock = my_socket_ref (hd->sock); - cookie->session = http_session_ref (hd->session); - cookie->use_tls = hd->uri->use_tls; - - hd->read_cookie = cookie; - hd->fp_read = es_fopencookie (cookie, "r", cookie_functions); - if (!hd->fp_read) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - my_socket_unref (cookie->sock, NULL, NULL); - http_session_unref (cookie->session); - xfree (cookie); - hd->read_cookie = NULL; - return err; - } - - err = parse_response (hd); - - if (!err) - err = es_onclose (hd->fp_read, 1, fp_onclose_notification, hd); - - return err; -} - - -/* Convenience function to send a request and wait for the response. - Closes the handle on error. If PROXY is not NULL, this value will - be used as an HTTP proxy and any enabled $http_proxy gets - ignored. */ -gpg_error_t -http_open_document (http_t *r_hd, const char *document, - const char *auth, unsigned int flags, const char *proxy, - http_session_t session, - const char *srvtag, strlist_t headers) -{ - gpg_error_t err; - - err = http_open (r_hd, HTTP_REQ_GET, document, NULL, auth, flags, - proxy, session, srvtag, headers); - if (err) - return err; - - err = http_wait_response (*r_hd); - if (err) - http_close (*r_hd, 0); - - return err; -} - - -void -http_close (http_t hd, int keep_read_stream) -{ - if (!hd) - return; - - /* First remove the close notifications for the streams. */ - if (hd->fp_read) - es_onclose (hd->fp_read, 0, fp_onclose_notification, hd); - if (hd->fp_write) - es_onclose (hd->fp_write, 0, fp_onclose_notification, hd); - - /* Now we can close the streams. */ - my_socket_unref (hd->sock, NULL, NULL); - if (hd->fp_read && !keep_read_stream) - es_fclose (hd->fp_read); - if (hd->fp_write) - es_fclose (hd->fp_write); - http_session_unref (hd->session); - http_release_parsed_uri (hd->uri); - while (hd->headers) - { - header_t tmp = hd->headers->next; - xfree (hd->headers->value); - xfree (hd->headers); - hd->headers = tmp; - } - xfree (hd->buffer); - xfree (hd); -} - - -estream_t -http_get_read_ptr (http_t hd) -{ - return hd?hd->fp_read:NULL; -} - -estream_t -http_get_write_ptr (http_t hd) -{ - return hd?hd->fp_write:NULL; -} - -unsigned int -http_get_status_code (http_t hd) -{ - return hd?hd->status_code:0; -} - -/* Return information pertaining to TLS. If TLS is not in use for HD, - NULL is returned. WHAT is used ask for specific information: - - (NULL) := Only check whether TLS is is use. Returns an - unspecified string if TLS is in use. That string may - even be the empty string. - */ -const char * -http_get_tls_info (http_t hd, const char *what) -{ - (void)what; - - if (!hd) - return NULL; - - return hd->uri->use_tls? "":NULL; -} - - - -static gpg_error_t -parse_uri (parsed_uri_t *ret_uri, const char *uri, - int no_scheme_check, int force_tls) -{ - gpg_err_code_t ec; - - *ret_uri = xtrycalloc (1, sizeof **ret_uri + strlen (uri)); - if (!*ret_uri) - return gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - strcpy ((*ret_uri)->buffer, uri); - ec = do_parse_uri (*ret_uri, 0, no_scheme_check, force_tls); - if (ec) - { - xfree (*ret_uri); - *ret_uri = NULL; - } - return gpg_err_make (default_errsource, ec); -} - - -/* - * Parse an URI and put the result into the newly allocated RET_URI. - * On success the caller must use http_release_parsed_uri() to - * releases the resources. If NO_SCHEME_CHECK is set, the function - * tries to parse the URL in the same way it would do for an HTTP - * style URI. - */ -gpg_error_t -http_parse_uri (parsed_uri_t *ret_uri, const char *uri, - int no_scheme_check) -{ - return parse_uri (ret_uri, uri, no_scheme_check, 0); -} - - -void -http_release_parsed_uri (parsed_uri_t uri) -{ - if (uri) - { - uri_tuple_t r, r2; - - for (r = uri->query; r; r = r2) - { - r2 = r->next; - xfree (r); - } - xfree (uri); - } -} - - -static gpg_err_code_t -do_parse_uri (parsed_uri_t uri, int only_local_part, - int no_scheme_check, int force_tls) -{ - uri_tuple_t *tail; - char *p, *p2, *p3, *pp; - int n; - - p = uri->buffer; - n = strlen (uri->buffer); - - /* Initialize all fields to an empty string or an empty list. */ - uri->scheme = uri->host = uri->path = p + n; - uri->port = 0; - uri->params = uri->query = NULL; - uri->use_tls = 0; - uri->is_http = 0; - uri->opaque = 0; - uri->v6lit = 0; - - /* A quick validity check. */ - if (strspn (p, VALID_URI_CHARS) != n) - return GPG_ERR_BAD_URI; /* Invalid characters found. */ - - if (!only_local_part) - { - /* Find the scheme. */ - if (!(p2 = strchr (p, ':')) || p2 == p) - return GPG_ERR_BAD_URI; /* No scheme. */ - *p2++ = 0; - for (pp=p; *pp; pp++) - *pp = tolower (*(unsigned char*)pp); - uri->scheme = p; - if (!strcmp (uri->scheme, "http") && !force_tls) - { - uri->port = 80; - uri->is_http = 1; - } - else if (!strcmp (uri->scheme, "hkp") && !force_tls) - { - uri->port = 11371; - uri->is_http = 1; - } -#ifdef USE_TLS - else if (!strcmp (uri->scheme, "https") || !strcmp (uri->scheme,"hkps") - || (force_tls && (!strcmp (uri->scheme, "http") - || !strcmp (uri->scheme,"hkp")))) - { - uri->port = 443; - uri->is_http = 1; - uri->use_tls = 1; - } -#endif /*USE_TLS*/ - else if (!no_scheme_check) - return GPG_ERR_INV_URI; /* Unsupported scheme */ - - p = p2; - - if (*p == '/' && p[1] == '/' ) /* There seems to be a hostname. */ - { - p += 2; - if ((p2 = strchr (p, '/'))) - *p2++ = 0; - - /* Check for username/password encoding */ - if ((p3 = strchr (p, '@'))) - { - uri->auth = p; - *p3++ = '\0'; - p = p3; - } - - for (pp=p; *pp; pp++) - *pp = tolower (*(unsigned char*)pp); - - /* Handle an IPv6 literal */ - if( *p == '[' && (p3=strchr( p, ']' )) ) - { - *p3++ = '\0'; - /* worst case, uri->host should have length 0, points to \0 */ - uri->host = p + 1; - uri->v6lit = 1; - p = p3; - } - else - uri->host = p; - - if ((p3 = strchr (p, ':'))) - { - *p3++ = '\0'; - uri->port = atoi (p3); - } - - if ((n = remove_escapes (uri->host)) < 0) - return GPG_ERR_BAD_URI; - if (n != strlen (uri->host)) - return GPG_ERR_BAD_URI; /* Hostname incudes a Nul. */ - p = p2 ? p2 : NULL; - } - else if (uri->is_http) - return GPG_ERR_INV_URI; /* No Leading double slash for HTTP. */ - else - { - uri->opaque = 1; - uri->path = p; - return 0; - } - - } /* End global URI part. */ - - /* Parse the pathname part */ - if (!p || !*p) - return 0; /* We don't have a path. Okay. */ - - /* TODO: Here we have to check params. */ - - /* Do we have a query part? */ - if ((p2 = strchr (p, '?'))) - *p2++ = 0; - - uri->path = p; - if ((n = remove_escapes (p)) < 0) - return GPG_ERR_BAD_URI; - if (n != strlen (p)) - return GPG_ERR_BAD_URI; /* Path includes a Nul. */ - p = p2 ? p2 : NULL; - - if (!p || !*p) - return 0; /* We don't have a query string. Okay. */ - - /* Now parse the query string. */ - tail = &uri->query; - for (;;) - { - uri_tuple_t elem; - - if ((p2 = strchr (p, '&'))) - *p2++ = 0; - if (!(elem = parse_tuple (p))) - return GPG_ERR_BAD_URI; - *tail = elem; - tail = &elem->next; - - if (!p2) - break; /* Ready. */ - p = p2; - } - - return 0; -} - - -/* - * Remove all %xx escapes; this is done in-place. Returns: New length - * of the string. - */ -static int -remove_escapes (char *string) -{ - int n = 0; - unsigned char *p, *s; - - for (p = s = (unsigned char*)string; *s; s++) - { - if (*s == '%') - { - if (s[1] && s[2] && isxdigit (s[1]) && isxdigit (s[2])) - { - s++; - *p = *s >= '0' && *s <= '9' ? *s - '0' : - *s >= 'A' && *s <= 'F' ? *s - 'A' + 10 : *s - 'a' + 10; - *p <<= 4; - s++; - *p |= *s >= '0' && *s <= '9' ? *s - '0' : - *s >= 'A' && *s <= 'F' ? *s - 'A' + 10 : *s - 'a' + 10; - p++; - n++; - } - else - { - *p++ = *s++; - if (*s) - *p++ = *s++; - if (*s) - *p++ = *s++; - if (*s) - *p = 0; - return -1; /* Bad URI. */ - } - } - else - { - *p++ = *s; - n++; - } - } - *p = 0; /* Make sure to keep a string terminator. */ - return n; -} - - -/* If SPECIAL is NULL this function escapes in forms mode. */ -static size_t -escape_data (char *buffer, const void *data, size_t datalen, - const char *special) -{ - int forms = !special; - const unsigned char *s; - size_t n = 0; - - if (forms) - special = "%;?&="; - - for (s = data; datalen; s++, datalen--) - { - if (forms && *s == ' ') - { - if (buffer) - *buffer++ = '+'; - n++; - } - else if (forms && *s == '\n') - { - if (buffer) - memcpy (buffer, "%0D%0A", 6); - n += 6; - } - else if (forms && *s == '\r' && datalen > 1 && s[1] == '\n') - { - if (buffer) - memcpy (buffer, "%0D%0A", 6); - n += 6; - s++; - datalen--; - } - else if (strchr (VALID_URI_CHARS, *s) && !strchr (special, *s)) - { - if (buffer) - *(unsigned char*)buffer++ = *s; - n++; - } - else - { - if (buffer) - { - snprintf (buffer, 4, "%%%02X", *s); - buffer += 3; - } - n += 3; - } - } - return n; -} - - -static int -insert_escapes (char *buffer, const char *string, - const char *special) -{ - return escape_data (buffer, string, strlen (string), special); -} - - -/* Allocate a new string from STRING using standard HTTP escaping as - well as escaping of characters given in SPECIALS. A common pattern - for SPECIALS is "%;?&=". However it depends on the needs, for - example "+" and "/: often needs to be escaped too. Returns NULL on - failure and sets ERRNO. If SPECIAL is NULL a dedicated forms - encoding mode is used. */ -char * -http_escape_string (const char *string, const char *specials) -{ - int n; - char *buf; - - n = insert_escapes (NULL, string, specials); - buf = xtrymalloc (n+1); - if (buf) - { - insert_escapes (buf, string, specials); - buf[n] = 0; - } - return buf; -} - -/* Allocate a new string from {DATA,DATALEN} using standard HTTP - escaping as well as escaping of characters given in SPECIALS. A - common pattern for SPECIALS is "%;?&=". However it depends on the - needs, for example "+" and "/: often needs to be escaped too. - Returns NULL on failure and sets ERRNO. If SPECIAL is NULL a - dedicated forms encoding mode is used. */ -char * -http_escape_data (const void *data, size_t datalen, const char *specials) -{ - int n; - char *buf; - - n = escape_data (NULL, data, datalen, specials); - buf = xtrymalloc (n+1); - if (buf) - { - escape_data (buf, data, datalen, specials); - buf[n] = 0; - } - return buf; -} - - -static uri_tuple_t -parse_tuple (char *string) -{ - char *p = string; - char *p2; - int n; - uri_tuple_t tuple; - - if ((p2 = strchr (p, '='))) - *p2++ = 0; - if ((n = remove_escapes (p)) < 0) - return NULL; /* Bad URI. */ - if (n != strlen (p)) - return NULL; /* Name with a Nul in it. */ - tuple = xtrycalloc (1, sizeof *tuple); - if (!tuple) - return NULL; /* Out of core. */ - tuple->name = p; - if (!p2) /* We have only the name, so we assume an empty value string. */ - { - tuple->value = p + strlen (p); - tuple->valuelen = 0; - tuple->no_value = 1; /* Explicitly mark that we have seen no '='. */ - } - else /* Name and value. */ - { - if ((n = remove_escapes (p2)) < 0) - { - xfree (tuple); - return NULL; /* Bad URI. */ - } - tuple->value = p2; - tuple->valuelen = n; - } - return tuple; -} - - -/* Return true if STRING is likely "hostname:port" or only "hostname". */ -static int -is_hostname_port (const char *string) -{ - int colons = 0; - - if (!string || !*string) - return 0; - for (; *string; string++) - { - if (*string == ':') - { - if (colons) - return 0; - if (!string[1]) - return 0; - colons++; - } - else if (!colons && strchr (" \t\f\n\v_@[]/", *string)) - return 0; /* Invalid characters in hostname. */ - else if (colons && !digitp (string)) - return 0; /* Not a digit in the port. */ - } - return 1; -} - - -/* - * Send a HTTP request to the server - * Returns 0 if the request was successful - */ -static gpg_error_t -send_request (http_t hd, const char *httphost, const char *auth, - const char *proxy, const char *srvtag, strlist_t headers) -{ - gpg_error_t err; - const char *server; - char *request, *p; - unsigned short port; - const char *http_proxy = NULL; - char *proxy_authstr = NULL; - char *authstr = NULL; - int sock; - int hnf; - - if (hd->uri->use_tls && !hd->session) - { - log_error ("TLS requested but no session object provided\n"); - return gpg_err_make (default_errsource, GPG_ERR_INTERNAL); - } -#ifdef USE_TLS - if (hd->uri->use_tls && !hd->session->tls_session) - { - log_error ("TLS requested but no GNUTLS context available\n"); - return gpg_err_make (default_errsource, GPG_ERR_INTERNAL); - } -#endif /*USE_TLS*/ - - if ((hd->flags & HTTP_FLAG_FORCE_TOR)) - { - log_error ("TOR support is not yet available\n"); - return gpg_err_make (default_errsource, GPG_ERR_NOT_IMPLEMENTED); - } - - server = *hd->uri->host ? hd->uri->host : "localhost"; - port = hd->uri->port ? hd->uri->port : 80; - - /* Try to use SNI. */ -#ifdef USE_TLS - if (hd->uri->use_tls) - { -# if HTTP_USE_GNUTLS - int rc; -# endif - - xfree (hd->session->servername); - hd->session->servername = xtrystrdup (httphost? httphost : server); - if (!hd->session->servername) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - return err; - } - -# if HTTP_USE_NTBTLS - err = ntbtls_set_hostname (hd->session->tls_session, - hd->session->servername); - if (err) - { - log_info ("ntbtls_set_hostname failed: %s\n", gpg_strerror (err)); - return err; - } -# elif HTTP_USE_GNUTLS - rc = gnutls_server_name_set (hd->session->tls_session, - GNUTLS_NAME_DNS, - hd->session->servername, - strlen (hd->session->servername)); - if (rc < 0) - log_info ("gnutls_server_name_set failed: %s\n", gnutls_strerror (rc)); -# endif /*HTTP_USE_GNUTLS*/ - } -#endif /*USE_TLS*/ - - if ( (proxy && *proxy) - || ( (hd->flags & HTTP_FLAG_TRY_PROXY) - && (http_proxy = getenv (HTTP_PROXY_ENV)) - && *http_proxy )) - { - parsed_uri_t uri; - int save_errno; - - if (proxy) - http_proxy = proxy; - - err = parse_uri (&uri, http_proxy, 0, 0); - if (gpg_err_code (err) == GPG_ERR_INV_URI - && is_hostname_port (http_proxy)) - { - /* Retry assuming a "hostname:port" string. */ - char *tmpname = strconcat ("http://", http_proxy, NULL); - if (tmpname && !parse_uri (&uri, tmpname, 0, 0)) - err = 0; - xfree (tmpname); - } - - if (err) - ; - else if (!strcmp (uri->scheme, "http") || !strcmp (uri->scheme, "socks4")) - ; - else if (!strcmp (uri->scheme, "socks5h")) - err = gpg_err_make (default_errsource, GPG_ERR_NOT_IMPLEMENTED); - else - err = gpg_err_make (default_errsource, GPG_ERR_INV_URI); - - if (err) - { - log_error ("invalid HTTP proxy (%s): %s\n", - http_proxy, gpg_strerror (err)); - return gpg_err_make (default_errsource, GPG_ERR_CONFIGURATION); - } - - if (uri->auth) - { - remove_escapes (uri->auth); - proxy_authstr = make_header_line ("Proxy-Authorization: Basic ", - "\r\n", - uri->auth, strlen(uri->auth)); - if (!proxy_authstr) - { - err = gpg_err_make (default_errsource, - gpg_err_code_from_syserror ()); - http_release_parsed_uri (uri); - return err; - } - } - - sock = connect_server (*uri->host ? uri->host : "localhost", - uri->port ? uri->port : 80, - hd->flags, srvtag, &hnf); - save_errno = errno; - http_release_parsed_uri (uri); - if (sock == -1) - gpg_err_set_errno (save_errno); - } - else - { - sock = connect_server (server, port, hd->flags, srvtag, &hnf); - } - - if (sock == -1) - { - xfree (proxy_authstr); - return gpg_err_make (default_errsource, - (hnf? GPG_ERR_UNKNOWN_HOST - : gpg_err_code_from_syserror ())); - } - hd->sock = my_socket_new (sock); - if (!hd->sock) - { - xfree (proxy_authstr); - return gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - } - - - -#if HTTP_USE_NTBTLS - if (hd->uri->use_tls) - { - my_socket_ref (hd->sock); - - while ((err = ntbtls_handshake (hd->session->tls_session))) - { - switch (err) - { - default: - log_info ("TLS handshake failed: %s <%s>\n", - gpg_strerror (err), gpg_strsource (err)); - xfree (proxy_authstr); - return err; - } - } - - hd->session->verify.done = 0; - if (tls_callback) - err = tls_callback (hd, hd->session, 0); - else - err = http_verify_server_credentials (hd->session); - if (err) - { - log_info ("TLS connection authentication failed: %s <%s>\n", - gpg_strerror (err), gpg_strsource (err)); - xfree (proxy_authstr); - return err; - } - } -#elif HTTP_USE_GNUTLS - if (hd->uri->use_tls) - { - int rc; - - my_socket_ref (hd->sock); - gnutls_transport_set_ptr (hd->session->tls_session, hd->sock); -#ifdef USE_NPTH - gnutls_transport_set_pull_function (hd->session->tls_session, - my_npth_read); - gnutls_transport_set_push_function (hd->session->tls_session, - my_npth_write); -#endif - - do - { - rc = gnutls_handshake (hd->session->tls_session); - } - while (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN); - if (rc < 0) - { - if (rc == GNUTLS_E_WARNING_ALERT_RECEIVED - || rc == GNUTLS_E_FATAL_ALERT_RECEIVED) - { - gnutls_alert_description_t alertno; - const char *alertstr; - - alertno = gnutls_alert_get (hd->session->tls_session); - alertstr = gnutls_alert_get_name (alertno); - log_info ("TLS handshake failed: %s (alert %d)\n", - alertstr, (int)alertno); - if (alertno == GNUTLS_A_UNRECOGNIZED_NAME && server) - log_info (" (sent server name '%s')\n", server); - } - else - log_info ("TLS handshake failed: %s\n", gnutls_strerror (rc)); - xfree (proxy_authstr); - return gpg_err_make (default_errsource, GPG_ERR_NETWORK); - } - - hd->session->verify.done = 0; - if (tls_callback) - err = tls_callback (hd, hd->session, 0); - else - err = http_verify_server_credentials (hd->session); - if (err) - { - log_info ("TLS connection authentication failed: %s\n", - gpg_strerror (err)); - xfree (proxy_authstr); - return err; - } - } -#endif /*HTTP_USE_GNUTLS*/ - - if (auth || hd->uri->auth) - { - char *myauth; - - if (auth) - { - myauth = xtrystrdup (auth); - if (!myauth) - { - xfree (proxy_authstr); - return gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - } - remove_escapes (myauth); - } - else - { - remove_escapes (hd->uri->auth); - myauth = hd->uri->auth; - } - - authstr = make_header_line ("Authorization: Basic ", "\r\n", - myauth, strlen (myauth)); - if (auth) - xfree (myauth); - - if (!authstr) - { - xfree (proxy_authstr); - return gpg_err_make (default_errsource, - gpg_err_code_from_syserror ()); - } - } - - p = build_rel_path (hd->uri); - if (!p) - return gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - - if (http_proxy && *http_proxy) - { - request = es_bsprintf - ("%s %s://%s:%hu%s%s HTTP/1.0\r\n%s%s", - hd->req_type == HTTP_REQ_GET ? "GET" : - hd->req_type == HTTP_REQ_HEAD ? "HEAD" : - hd->req_type == HTTP_REQ_POST ? "POST" : "OOPS", - hd->uri->use_tls? "https" : "http", - httphost? httphost : server, - port, *p == '/' ? "" : "/", p, - authstr ? authstr : "", - proxy_authstr ? proxy_authstr : ""); - } - else - { - char portstr[35]; - - if (port == 80) - *portstr = 0; - else - snprintf (portstr, sizeof portstr, ":%u", port); - - request = es_bsprintf - ("%s %s%s HTTP/1.0\r\nHost: %s%s\r\n%s", - hd->req_type == HTTP_REQ_GET ? "GET" : - hd->req_type == HTTP_REQ_HEAD ? "HEAD" : - hd->req_type == HTTP_REQ_POST ? "POST" : "OOPS", - *p == '/' ? "" : "/", p, - httphost? httphost : server, - portstr, - authstr? authstr:""); - } - xfree (p); - if (!request) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - xfree (authstr); - xfree (proxy_authstr); - return err; - } - - /* log_debug ("request:\n%s\nEND request\n", request); */ - - /* First setup estream so that we can write even the first line - using estream. This is also required for the sake of gnutls. */ - { - cookie_t cookie; - - cookie = xtrycalloc (1, sizeof *cookie); - if (!cookie) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - goto leave; - } - cookie->sock = my_socket_ref (hd->sock); - hd->write_cookie = cookie; - cookie->use_tls = hd->uri->use_tls; - cookie->session = http_session_ref (hd->session); - - hd->fp_write = es_fopencookie (cookie, "w", cookie_functions); - if (!hd->fp_write) - { - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - my_socket_unref (cookie->sock, NULL, NULL); - xfree (cookie); - hd->write_cookie = NULL; - } - else if (es_fputs (request, hd->fp_write) || es_fflush (hd->fp_write)) - err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ()); - else - err = 0; - - if (!err) - { - for (;headers; headers=headers->next) - { - if ((es_fputs (headers->d, hd->fp_write) || es_fflush (hd->fp_write)) - || (es_fputs("\r\n",hd->fp_write) || es_fflush(hd->fp_write))) - { - err = gpg_err_make (default_errsource, - gpg_err_code_from_syserror ()); - break; - } - } - } - } - - leave: - es_free (request); - xfree (authstr); - xfree (proxy_authstr); - - return err; -} - - -/* - * Build the relative path from the parsed URI. Minimal - * implementation. May return NULL in case of memory failure; errno - * is then set accordingly. - */ -static char * -build_rel_path (parsed_uri_t uri) -{ - uri_tuple_t r; - char *rel_path, *p; - int n; - - /* Count the needed space. */ - n = insert_escapes (NULL, uri->path, "%;?&"); - /* TODO: build params. */ - for (r = uri->query; r; r = r->next) - { - n++; /* '?'/'&' */ - n += insert_escapes (NULL, r->name, "%;?&="); - if (!r->no_value) - { - n++; /* '=' */ - n += insert_escapes (NULL, r->value, "%;?&="); - } - } - n++; - - /* Now allocate and copy. */ - p = rel_path = xtrymalloc (n); - if (!p) - return NULL; - n = insert_escapes (p, uri->path, "%;?&"); - p += n; - /* TODO: add params. */ - for (r = uri->query; r; r = r->next) - { - *p++ = r == uri->query ? '?' : '&'; - n = insert_escapes (p, r->name, "%;?&="); - p += n; - if (!r->no_value) - { - *p++ = '='; - /* TODO: Use valuelen. */ - n = insert_escapes (p, r->value, "%;?&="); - p += n; - } - } - *p = 0; - return rel_path; -} - - -/* Transform a header name into a standard capitalized format; e.g. - "Content-Type". Conversion stops at the colon. As usual we don't - use the localized versions of ctype.h. */ -static void -capitalize_header_name (char *name) -{ - int first = 1; - - for (; *name && *name != ':'; name++) - { - if (*name == '-') - first = 1; - else if (first) - { - if (*name >= 'a' && *name <= 'z') - *name = *name - 'a' + 'A'; - first = 0; - } - else if (*name >= 'A' && *name <= 'Z') - *name = *name - 'A' + 'a'; - } -} - - -/* Store an HTTP header line in LINE away. Line continuation is - supported as well as merging of headers with the same name. This - function may modify LINE. */ -static gpg_err_code_t -store_header (http_t hd, char *line) -{ - size_t n; - char *p, *value; - header_t h; - - n = strlen (line); - if (n && line[n-1] == '\n') - { - line[--n] = 0; - if (n && line[n-1] == '\r') - line[--n] = 0; - } - if (!n) /* we are never called to hit this. */ - return GPG_ERR_BUG; - if (*line == ' ' || *line == '\t') - { - /* Continuation. This won't happen too often as it is not - recommended. We use a straightforward implementaion. */ - if (!hd->headers) - return GPG_ERR_PROTOCOL_VIOLATION; - n += strlen (hd->headers->value); - p = xtrymalloc (n+1); - if (!p) - return gpg_err_code_from_syserror (); - strcpy (stpcpy (p, hd->headers->value), line); - xfree (hd->headers->value); - hd->headers->value = p; - return 0; - } - - capitalize_header_name (line); - p = strchr (line, ':'); - if (!p) - return GPG_ERR_PROTOCOL_VIOLATION; - *p++ = 0; - while (*p == ' ' || *p == '\t') - p++; - value = p; - - for (h=hd->headers; h; h = h->next) - if ( !strcmp (h->name, line) ) - break; - if (h) - { - /* We have already seen a line with that name. Thus we assume - it is a comma separated list and merge them. */ - p = xtrymalloc (strlen (h->value) + 1 + strlen (value)+ 1); - if (!p) - return gpg_err_code_from_syserror (); - strcpy (stpcpy (stpcpy (p, h->value), ","), value); - xfree (h->value); - h->value = p; - return 0; - } - - /* Append a new header. */ - h = xtrymalloc (sizeof *h + strlen (line)); - if (!h) - return gpg_err_code_from_syserror (); - strcpy (h->name, line); - h->value = xtrymalloc (strlen (value)+1); - if (!h->value) - { - xfree (h); - return gpg_err_code_from_syserror (); - } - strcpy (h->value, value); - h->next = hd->headers; - hd->headers = h; - - return 0; -} - - -/* Return the header NAME from the last response. The returned value - is valid as along as HD has not been closed and no other request - has been send. If the header was not found, NULL is returned. NAME - must be canonicalized, that is the first letter of each dash - delimited part must be uppercase and all other letters lowercase. */ -const char * -http_get_header (http_t hd, const char *name) -{ - header_t h; - - for (h=hd->headers; h; h = h->next) - if ( !strcmp (h->name, name) ) - return h->value; - return NULL; -} - - -/* Return a newly allocated and NULL terminated array with pointers to - header names. The array must be released with xfree() and its - content is only values as long as no other request has been - send. */ -const char ** -http_get_header_names (http_t hd) -{ - const char **array; - size_t n; - header_t h; - - for (n=0, h = hd->headers; h; h = h->next) - n++; - array = xtrycalloc (n+1, sizeof *array); - if (array) - { - for (n=0, h = hd->headers; h; h = h->next) - array[n++] = h->name; - } - - return array; -} - - -/* - * Parse the response from a server. - * Returns: Errorcode and sets some files in the handle - */ -static gpg_err_code_t -parse_response (http_t hd) -{ - char *line, *p, *p2; - size_t maxlen, len; - cookie_t cookie = hd->read_cookie; - const char *s; - - /* Delete old header lines. */ - while (hd->headers) - { - header_t tmp = hd->headers->next; - xfree (hd->headers->value); - xfree (hd->headers); - hd->headers = tmp; - } - - /* Wait for the status line. */ - do - { - maxlen = MAX_LINELEN; - len = es_read_line (hd->fp_read, &hd->buffer, &hd->buffer_size, &maxlen); - line = hd->buffer; - if (!line) - return gpg_err_code_from_syserror (); /* Out of core. */ - if (!maxlen) - return GPG_ERR_TRUNCATED; /* Line has been truncated. */ - if (!len) - return GPG_ERR_EOF; - - if ((hd->flags & HTTP_FLAG_LOG_RESP)) - log_info ("RESP: '%.*s'\n", - (int)strlen(line)-(*line&&line[1]?2:0),line); - } - while (!*line); - - if ((p = strchr (line, '/'))) - *p++ = 0; - if (!p || strcmp (line, "HTTP")) - return 0; /* Assume http 0.9. */ - - if ((p2 = strpbrk (p, " \t"))) - { - *p2++ = 0; - p2 += strspn (p2, " \t"); - } - if (!p2) - return 0; /* Also assume http 0.9. */ - p = p2; - /* TODO: Add HTTP version number check. */ - if ((p2 = strpbrk (p, " \t"))) - *p2++ = 0; - if (!isdigit ((unsigned int)p[0]) || !isdigit ((unsigned int)p[1]) - || !isdigit ((unsigned int)p[2]) || p[3]) - { - /* Malformed HTTP status code - assume http 0.9. */ - hd->is_http_0_9 = 1; - hd->status_code = 200; - return 0; - } - hd->status_code = atoi (p); - - /* Skip all the header lines and wait for the empty line. */ - do - { - maxlen = MAX_LINELEN; - len = es_read_line (hd->fp_read, &hd->buffer, &hd->buffer_size, &maxlen); - line = hd->buffer; - if (!line) - return gpg_err_code_from_syserror (); /* Out of core. */ - /* Note, that we can silently ignore truncated lines. */ - if (!len) - return GPG_ERR_EOF; - /* Trim line endings of empty lines. */ - if ((*line == '\r' && line[1] == '\n') || *line == '\n') - *line = 0; - if ((hd->flags & HTTP_FLAG_LOG_RESP)) - log_info ("RESP: '%.*s'\n", - (int)strlen(line)-(*line&&line[1]?2:0),line); - if (*line) - { - gpg_err_code_t ec = store_header (hd, line); - if (ec) - return ec; - } - } - while (len && *line); - - cookie->content_length_valid = 0; - if (!(hd->flags & HTTP_FLAG_IGNORE_CL)) - { - s = http_get_header (hd, "Content-Length"); - if (s) - { - cookie->content_length_valid = 1; - cookie->content_length = counter_strtoul (s); - } - } - - return 0; -} - -#if 0 -static int -start_server () -{ - struct sockaddr_in mya; - struct sockaddr_in peer; - int fd, client; - fd_set rfds; - int addrlen; - int i; - - if ((fd = socket (AF_INET, SOCK_STREAM, 0)) == -1) - { - log_error ("socket() failed: %s\n", strerror (errno)); - return -1; - } - i = 1; - if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, (byte *) & i, sizeof (i))) - log_info ("setsockopt(SO_REUSEADDR) failed: %s\n", strerror (errno)); - - mya.sin_family = AF_INET; - memset (&mya.sin_addr, 0, sizeof (mya.sin_addr)); - mya.sin_port = htons (11371); - - if (bind (fd, (struct sockaddr *) &mya, sizeof (mya))) - { - log_error ("bind to port 11371 failed: %s\n", strerror (errno)); - sock_close (fd); - return -1; - } - - if (listen (fd, 5)) - { - log_error ("listen failed: %s\n", strerror (errno)); - sock_close (fd); - return -1; - } - - for (;;) - { - FD_ZERO (&rfds); - FD_SET (fd, &rfds); - - if (my_select (fd + 1, &rfds, NULL, NULL, NULL) <= 0) - continue; /* ignore any errors */ - - if (!FD_ISSET (fd, &rfds)) - continue; - - addrlen = sizeof peer; - client = my_accept (fd, (struct sockaddr *) &peer, &addrlen); - if (client == -1) - continue; /* oops */ - - log_info ("connect from %s\n", inet_ntoa (peer.sin_addr)); - - fflush (stdout); - fflush (stderr); - if (!fork ()) - { - int c; - FILE *fp; - - fp = fdopen (client, "r"); - while ((c = getc (fp)) != EOF) - putchar (c); - fclose (fp); - exit (0); - } - sock_close (client); - } - - - return 0; -} -#endif - -/* Actually connect to a server. Returns the file descriptor or -1 on - error. ERRNO is set on error. */ -static int -connect_server (const char *server, unsigned short port, - unsigned int flags, const char *srvtag, int *r_host_not_found) -{ - int sock = -1; - int srvcount = 0; - int hostfound = 0; - int anyhostaddr = 0; - int srv, connected; - int last_errno = 0; - struct srventry *serverlist = NULL; -#ifdef HAVE_W32_SYSTEM - unsigned long inaddr; -#endif - - *r_host_not_found = 0; -#ifdef HAVE_W32_SYSTEM - -#ifndef HTTP_NO_WSASTARTUP - init_sockets (); -#endif - /* Win32 gethostbyname doesn't handle IP addresses internally, so we - try inet_addr first on that platform only. */ - inaddr = inet_addr(server); - if ( inaddr != INADDR_NONE ) - { - struct sockaddr_in addr; - - memset(&addr,0,sizeof(addr)); - - sock = socket(AF_INET,SOCK_STREAM,0); - if ( sock==INVALID_SOCKET ) - { - log_error("error creating socket: ec=%d\n",(int)WSAGetLastError()); - return -1; - } - - addr.sin_family = AF_INET; - addr.sin_port = htons(port); - memcpy (&addr.sin_addr,&inaddr,sizeof(inaddr)); - - if (!my_connect (sock,(struct sockaddr *)&addr,sizeof(addr)) ) - return sock; - sock_close(sock); - return -1; - } -#endif /*HAVE_W32_SYSTEM*/ - -#ifdef USE_DNS_SRV - /* Do the SRV thing */ - if (srvtag) - { - /* We're using SRV, so append the tags. */ - if (1+strlen (srvtag) + 6 + strlen (server) + 1 <= MAXDNAME) - { - char srvname[MAXDNAME]; - - stpcpy (stpcpy (stpcpy (stpcpy (srvname,"_"), srvtag), - "._tcp."), server); - srvcount = getsrv (srvname, &serverlist); - } - } -#else - (void)flags; - (void)srvtag; -#endif /*USE_DNS_SRV*/ - - if (!serverlist) - { - /* Either we're not using SRV, or the SRV lookup failed. Make - up a fake SRV record. */ - serverlist = xtrycalloc (1, sizeof *serverlist); - if (!serverlist) - return -1; /* Out of core. */ - serverlist->port = port; - strncpy (serverlist->target, server, MAXDNAME); - serverlist->target[MAXDNAME-1] = '\0'; - srvcount = 1; - } - -#ifdef HAVE_GETADDRINFO - connected = 0; - for (srv=0; srv < srvcount && !connected; srv++) - { - struct addrinfo hints, *res, *ai; - char portstr[35]; - - snprintf (portstr, sizeof portstr, "%hu", port); - memset (&hints, 0, sizeof (hints)); - hints.ai_socktype = SOCK_STREAM; - if (getaddrinfo (serverlist[srv].target, portstr, &hints, &res)) - continue; /* Not found - try next one. */ - hostfound = 1; - - for (ai = res; ai && !connected; ai = ai->ai_next) - { - if (ai->ai_family == AF_INET && (flags & HTTP_FLAG_IGNORE_IPv4)) - continue; - if (ai->ai_family == AF_INET6 && (flags & HTTP_FLAG_IGNORE_IPv6)) - continue; - - if (sock != -1) - sock_close (sock); - sock = socket (ai->ai_family, ai->ai_socktype, ai->ai_protocol); - if (sock == -1) - { - int save_errno = errno; - log_error ("error creating socket: %s\n", strerror (errno)); - freeaddrinfo (res); - xfree (serverlist); - errno = save_errno; - return -1; - } - - anyhostaddr = 1; - if (my_connect (sock, ai->ai_addr, ai->ai_addrlen)) - last_errno = errno; - else - connected = 1; - } - freeaddrinfo (res); - } -#else /* !HAVE_GETADDRINFO */ - connected = 0; - for (srv=0; srv < srvcount && !connected; srv++) - { - int i; - struct hostent *host = NULL; - struct sockaddr_in addr; - - /* Note: This code is not thread-safe. */ - - memset (&addr, 0, sizeof (addr)); - host = gethostbyname (serverlist[srv].target); - if (!host) - continue; - hostfound = 1; - - if (sock != -1) - sock_close (sock); - sock = socket (host->h_addrtype, SOCK_STREAM, 0); - if (sock == -1) - { - log_error ("error creating socket: %s\n", strerror (errno)); - xfree (serverlist); - return -1; - } - - addr.sin_family = host->h_addrtype; - if (addr.sin_family != AF_INET) - { - log_error ("unknown address family for '%s'\n", - serverlist[srv].target); - xfree (serverlist); - return -1; - } - addr.sin_port = htons (serverlist[srv].port); - if (host->h_length != 4) - { - log_error ("illegal address length for '%s'\n", - serverlist[srv].target); - xfree (serverlist); - return -1; - } - - /* Try all A records until one responds. */ - for (i = 0; host->h_addr_list[i] && !connected; i++) - { - anyhostaddr = 1; - memcpy (&addr.sin_addr, host->h_addr_list[i], host->h_length); - if (my_connect (sock, (struct sockaddr *) &addr, sizeof (addr))) - last_errno = errno; - else - { - connected = 1; - break; - } - } - } -#endif /* !HAVE_GETADDRINFO */ - - xfree (serverlist); - - if (!connected) - { - if (!hostfound) - log_error ("can't connect to '%s': %s\n", - server, "host not found"); - else if (!anyhostaddr) - log_error ("can't connect to '%s': %s\n", - server, "no IP address for host"); - else - { -#ifdef HAVE_W32_SYSTEM - log_error ("can't connect to '%s': ec=%d\n", - server, (int)WSAGetLastError()); -#else - log_error ("can't connect to '%s': %s\n", - server, strerror (last_errno)); -#endif - } - if (!hostfound || (hostfound && !anyhostaddr)) - *r_host_not_found = 1; - if (sock != -1) - sock_close (sock); - gpg_err_set_errno (last_errno); - return -1; - } - return sock; -} - - -static gpg_error_t -write_server (int sock, const char *data, size_t length) -{ - int nleft; - int nwritten; - - nleft = length; - while (nleft > 0) - { -#if defined(HAVE_W32_SYSTEM) -# if defined(USE_NPTH) - npth_unprotect (); -# endif - nwritten = send (sock, data, nleft, 0); -# if defined(USE_NPTH) - npth_protect (); -# endif - if ( nwritten == SOCKET_ERROR ) - { - log_info ("network write failed: ec=%d\n", (int)WSAGetLastError ()); - return gpg_error (GPG_ERR_NETWORK); - } -#else /*!HAVE_W32_SYSTEM*/ -# ifdef USE_NPTH - nwritten = npth_write (sock, data, nleft); -# else - nwritten = write (sock, data, nleft); -# endif - if (nwritten == -1) - { - if (errno == EINTR) - continue; - if (errno == EAGAIN) - { - struct timeval tv; - - tv.tv_sec = 0; - tv.tv_usec = 50000; - my_select (0, NULL, NULL, NULL, &tv); - continue; - } - log_info ("network write failed: %s\n", strerror (errno)); - return gpg_error_from_syserror (); - } -#endif /*!HAVE_W32_SYSTEM*/ - nleft -= nwritten; - data += nwritten; - } - - return 0; -} - - - -/* Read handler for estream. */ -static ssize_t -cookie_read (void *cookie, void *buffer, size_t size) -{ - cookie_t c = cookie; - int nread; - - if (c->content_length_valid) - { - if (!c->content_length) - return 0; /* EOF */ - if (c->content_length < size) - size = c->content_length; - } - -#ifdef HTTP_USE_GNUTLS - if (c->use_tls && c->session && c->session->tls_session) - { - again: - nread = gnutls_record_recv (c->session->tls_session, buffer, size); - if (nread < 0) - { - if (nread == GNUTLS_E_INTERRUPTED) - goto again; - if (nread == GNUTLS_E_AGAIN) - { - struct timeval tv; - - tv.tv_sec = 0; - tv.tv_usec = 50000; - my_select (0, NULL, NULL, NULL, &tv); - goto again; - } - if (nread == GNUTLS_E_REHANDSHAKE) - goto again; /* A client is allowed to just ignore this request. */ - log_info ("TLS network read failed: %s\n", gnutls_strerror (nread)); - gpg_err_set_errno (EIO); - return -1; - } - } - else -#endif /*HTTP_USE_GNUTLS*/ - { - do - { -#ifdef HAVE_W32_SYSTEM - /* Under Windows we need to use recv for a socket. */ -# if defined(USE_NPTH) - npth_unprotect (); -# endif - nread = recv (c->sock->fd, buffer, size, 0); -# if defined(USE_NPTH) - npth_protect (); -# endif - -#else /*!HAVE_W32_SYSTEM*/ - -# ifdef USE_NPTH - nread = npth_read (c->sock->fd, buffer, size); -# else - nread = read (c->sock->fd, buffer, size); -# endif - -#endif /*!HAVE_W32_SYSTEM*/ - } - while (nread == -1 && errno == EINTR); - } - - if (c->content_length_valid && nread > 0) - { - if (nread < c->content_length) - c->content_length -= nread; - else - c->content_length = 0; - } - - return nread; -} - -/* Write handler for estream. */ -static ssize_t -cookie_write (void *cookie, const void *buffer_arg, size_t size) -{ - const char *buffer = buffer_arg; - cookie_t c = cookie; - int nwritten = 0; - -#ifdef HTTP_USE_GNUTLS - if (c->use_tls && c->session && c->session->tls_session) - { - int nleft = size; - while (nleft > 0) - { - nwritten = gnutls_record_send (c->session->tls_session, - buffer, nleft); - if (nwritten <= 0) - { - if (nwritten == GNUTLS_E_INTERRUPTED) - continue; - if (nwritten == GNUTLS_E_AGAIN) - { - struct timeval tv; - - tv.tv_sec = 0; - tv.tv_usec = 50000; - my_select (0, NULL, NULL, NULL, &tv); - continue; - } - log_info ("TLS network write failed: %s\n", - gnutls_strerror (nwritten)); - gpg_err_set_errno (EIO); - return -1; - } - nleft -= nwritten; - buffer += nwritten; - } - } - else -#endif /*HTTP_USE_GNUTLS*/ - { - if ( write_server (c->sock->fd, buffer, size) ) - { - gpg_err_set_errno (EIO); - nwritten = -1; - } - else - nwritten = size; - } - - return nwritten; -} - - -#ifdef HTTP_USE_GNUTLS -/* Wrapper for gnutls_bye used by my_socket_unref. */ -static void -send_gnutls_bye (void *opaque) -{ - tls_session_t tls_session = opaque; - int ret; - - again: - do - ret = gnutls_bye (tls_session, GNUTLS_SHUT_RDWR); - while (ret == GNUTLS_E_INTERRUPTED); - if (ret == GNUTLS_E_AGAIN) - { - struct timeval tv; - - tv.tv_sec = 0; - tv.tv_usec = 50000; - my_select (0, NULL, NULL, NULL, &tv); - goto again; - } -} -#endif /*HTTP_USE_GNUTLS*/ - -/* Close handler for estream. */ -static int -cookie_close (void *cookie) -{ - cookie_t c = cookie; - - if (!c) - return 0; - -#ifdef HTTP_USE_GNUTLS - if (c->use_tls && c->session && c->session->tls_session) - my_socket_unref (c->sock, send_gnutls_bye, c->session->tls_session); - else -#endif /*HTTP_USE_GNUTLS*/ - if (c->sock) - my_socket_unref (c->sock, NULL, NULL); - - if (c->session) - http_session_unref (c->session); - xfree (c); - return 0; -} - - - - -/* Verify the credentials of the server. Returns 0 on success and - store the result in the session object. */ -gpg_error_t -http_verify_server_credentials (http_session_t sess) -{ -#if HTTP_USE_NTBTLS - (void)sess; - return 0; /* FIXME!! */ -#elif HTTP_USE_GNUTLS - static const char const errprefix[] = "TLS verification of peer failed"; - int rc; - unsigned int status; - const char *hostname; - const gnutls_datum_t *certlist; - unsigned int certlistlen; - gnutls_x509_crt_t cert; - gpg_error_t err = 0; - - sess->verify.done = 1; - sess->verify.status = 0; - sess->verify.rc = GNUTLS_E_CERTIFICATE_ERROR; - - if (gnutls_certificate_type_get (sess->tls_session) != GNUTLS_CRT_X509) - { - log_error ("%s: %s\n", errprefix, "not an X.509 certificate"); - sess->verify.rc = GNUTLS_E_UNSUPPORTED_CERTIFICATE_TYPE; - return gpg_error (GPG_ERR_GENERAL); - } - - rc = gnutls_certificate_verify_peers2 (sess->tls_session, &status); - if (rc) - { - log_error ("%s: %s\n", errprefix, gnutls_strerror (rc)); - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - } - else if (status) - { - log_error ("%s: status=0x%04x\n", errprefix, status); -#if GNUTLS_VERSION_NUMBER >= 0x030104 - { - gnutls_datum_t statusdat; - - if (!gnutls_certificate_verification_status_print - (status, GNUTLS_CRT_X509, &statusdat, 0)) - { - log_info ("%s: %s\n", errprefix, statusdat.data); - gnutls_free (statusdat.data); - } - } -#endif /*gnutls >= 3.1.4*/ - - sess->verify.status = status; - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - } - - hostname = sess->servername; - if (!hostname || !strchr (hostname, '.')) - { - log_error ("%s: %s\n", errprefix, "hostname missing"); - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - } - - certlist = gnutls_certificate_get_peers (sess->tls_session, &certlistlen); - if (!certlistlen) - { - log_error ("%s: %s\n", errprefix, "server did not send a certificate"); - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - - /* Need to stop here. */ - if (err) - return err; - } - - rc = gnutls_x509_crt_init (&cert); - if (rc < 0) - { - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - if (err) - return err; - } - - rc = gnutls_x509_crt_import (cert, &certlist[0], GNUTLS_X509_FMT_DER); - if (rc < 0) - { - log_error ("%s: %s: %s\n", errprefix, "error importing certificate", - gnutls_strerror (rc)); - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - } - - if (!gnutls_x509_crt_check_hostname (cert, hostname)) - { - log_error ("%s: %s\n", errprefix, "hostname does not match"); - if (!err) - err = gpg_error (GPG_ERR_GENERAL); - } - - gnutls_x509_crt_deinit (cert); - - if (!err) - sess->verify.rc = 0; - - if (sess->cert_log_cb) - { - const void *bufarr[10]; - size_t buflenarr[10]; - size_t n; - - for (n = 0; n < certlistlen && n < DIM (bufarr)-1; n++) - { - bufarr[n] = certlist[n].data; - buflenarr[n] = certlist[n].size; - } - bufarr[n] = NULL; - buflenarr[n] = 0; - sess->cert_log_cb (sess, err, hostname, bufarr, buflenarr); - } - - return err; -#else /*!HTTP_USE_GNUTLS*/ - (void)sess; - return gpg_error (GPG_ERR_NOT_IMPLEMENTED); -#endif -} - -/* Return the first query variable with the specified key. If there - is no such variable, return NULL. */ -struct uri_tuple_s * -uri_query_lookup (parsed_uri_t uri, const char *key) -{ - struct uri_tuple_s *t; - - for (t = uri->query; t; t = t->next) - if (strcmp (t->name, key) == 0) - return t; - - return NULL; -} |