/
openconnect-internal.h
1168 lines (1025 loc) · 34.3 KB
/
openconnect-internal.h
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/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2008 Nick Andrew <nick@nick-andrew.net>
* Copyright © 2013 John Morrissey <jwm@horde.net>
*
* Author: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* This program 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
* Lesser General Public License for more details.
*/
#ifndef __OPENCONNECT_INTERNAL_H__
#define __OPENCONNECT_INTERNAL_H__
#define __OPENCONNECT_PRIVATE__
#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#ifndef SECURITY_WIN32
#define SECURITY_WIN32 1
#endif
#include <security.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#endif
#include "openconnect.h"
#if defined(OPENCONNECT_OPENSSL)
#include <openssl/ssl.h>
#include <openssl/err.h>
/* Ick */
#if OPENSSL_VERSION_NUMBER >= 0x00909000L
#define method_const const
#else
#define method_const
#endif
#endif /* OPENSSL */
#if defined(OPENCONNECT_GNUTLS)
#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>
#include <gnutls/x509.h>
#include <gnutls/crypto.h>
#ifdef HAVE_TROUSERS
#include <trousers/tss.h>
#include <trousers/trousers.h>
#endif
#endif
#ifdef HAVE_ICONV
#include <langinfo.h>
#include <iconv.h>
#endif
#include <zlib.h>
#include <stdint.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#ifdef LIBPROXY_HDR
#include LIBPROXY_HDR
#endif
#ifdef HAVE_LIBSTOKEN
#include <stoken.h>
#endif
#ifdef HAVE_GSSAPI
#include GSSAPI_HDR
#endif
#ifdef HAVE_LIBPSKC
#include <pskc/pskc.h>
#endif
#ifdef HAVE_LIBP11
#include <libp11.h>
#endif
#ifdef HAVE_LIBPCSCLITE
#ifdef __APPLE__
#include <PCSC/wintypes.h>
#include <PCSC/winscard.h>
#else
#include <winscard.h>
#endif
#endif
#ifdef ENABLE_NLS
#include <libintl.h>
#define _(s) dgettext("openconnect", s)
#else
#define _(s) ((char *)(s))
#endif
#define N_(s) s
#include <libxml/tree.h>
#define SHA1_SIZE 20
#define MD5_SIZE 16
/* FreeBSD provides this in <sys/param.h> */
#ifndef MAX
#define MAX(x,y) ((x)>(y))?(x):(y)
#endif
/****************************************************************************/
struct pkt {
int len;
struct pkt *next;
union {
struct {
uint32_t spi;
uint32_t seq;
unsigned char iv[16];
unsigned char payload[];
} esp;
struct {
unsigned char pad[2];
unsigned char rec[2];
unsigned char kmp[20];
} oncp;
struct {
unsigned char pad[16];
unsigned char hdr[8];
} cstp;
};
unsigned char data[];
};
#define REKEY_NONE 0
#define REKEY_TUNNEL 1
#define REKEY_SSL 2
#define KA_NONE 0
#define KA_DPD 1
#define KA_DPD_DEAD 2
#define KA_KEEPALIVE 3
#define KA_REKEY 4
#define DTLS_NOSECRET 0 /* Random secret has not been generated yet */
#define DTLS_SECRET 1 /* Secret is present, ready to attempt DTLS */
#define DTLS_DISABLED 2 /* DTLS was disabled on the *client* side */
#define DTLS_SLEEPING 3 /* For ESP, sometimes sending probes */
#define DTLS_CONNECTING 4 /* ESP probe received; must tell server */
#define DTLS_CONNECTED 5 /* Server informed and should be sending ESP */
#define COMPR_DEFLATE (1<<0)
#define COMPR_LZS (1<<1)
#define COMPR_LZ4 (1<<2)
#define COMPR_MAX COMPR_LZ4
#ifdef HAVE_LZ4
#define COMPR_STATELESS (COMPR_LZS | COMPR_LZ4)
#else
#define COMPR_STATELESS (COMPR_LZS)
#endif
#define COMPR_ALL (COMPR_STATELESS | COMPR_DEFLATE)
struct keepalive_info {
int dpd;
int keepalive;
int rekey;
int rekey_method;
time_t last_rekey;
time_t last_tx;
time_t last_rx;
time_t last_dpd;
};
struct pin_cache {
struct pin_cache *next;
char *token;
char *pin;
};
struct oc_text_buf {
char *data;
int pos;
int buf_len;
int error;
};
#define RECONNECT_INTERVAL_MIN 10
#define RECONNECT_INTERVAL_MAX 100
#define REDIR_TYPE_NONE 0
#define REDIR_TYPE_NEWHOST 1
#define REDIR_TYPE_LOCAL 2
#define AUTH_TYPE_GSSAPI 0
#define AUTH_TYPE_NTLM 1
#define AUTH_TYPE_DIGEST 2
#define AUTH_TYPE_BASIC 3
#define MAX_AUTH_TYPES 4
#define AUTH_DEFAULT_DISABLED -3
#define AUTH_DISABLED -2
#define AUTH_FAILED -1 /* Failed */
#define AUTH_UNSEEN 0 /* Server has not offered it */
#define AUTH_AVAILABLE 1 /* Server has offered it, we have not tried it */
/* Individual auth types may use 2 onwards for their own state */
#define AUTH_IN_PROGRESS 2 /* In-progress attempt */
struct http_auth_state {
int state;
char *challenge;
union {
#ifdef HAVE_GSSAPI
struct {
gss_name_t gss_target_name;
gss_ctx_id_t gss_context;
};
#endif
#ifdef _WIN32
struct {
CredHandle ntlm_sspi_cred;
CtxtHandle ntlm_sspi_ctx;
};
struct {
CredHandle sspi_cred;
CtxtHandle sspi_ctx;
SEC_WCHAR *sspi_target_name;
};
#else
struct {
int ntlm_helper_fd;
};
#endif
};
};
struct vpn_proto {
const char *name;
int (*vpn_close_session)(struct openconnect_info *vpninfo, const char *reason);
/* This does the full authentication, calling back as appropriate */
int (*obtain_cookie)(struct openconnect_info *vpninfo);
/* Establish the TCP connection (and obtain configuration) */
int (*tcp_connect)(struct openconnect_info *vpninfo);
int (*tcp_mainloop)(struct openconnect_info *vpninfo, int *timeout);
/* Add headers common to each HTTP request */
void (*add_http_headers)(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
/* Set up the UDP (DTLS) connection. Doesn't actually *start* it. */
int (*udp_setup)(struct openconnect_info *vpninfo, int attempt_period);
/* This will actually complete the UDP connection setup/handshake on the wire,
as well as transporting packets */
int (*udp_mainloop)(struct openconnect_info *vpninfo, int *timeout);
/* Close the connection but leave the session setup so it restarts */
void (*udp_close)(struct openconnect_info *vpninfo);
/* Close and destroy the (UDP) session */
void (*udp_shutdown)(struct openconnect_info *vpninfo);
};
struct pkt_q {
struct pkt *head;
struct pkt **tail;
int count;
};
static inline struct pkt *dequeue_packet(struct pkt_q *q)
{
struct pkt *ret = q->head;
if (ret) {
q->head = ret->next;
if (!--q->count)
q->tail = &q->head;
}
return ret;
}
static inline void requeue_packet(struct pkt_q *q, struct pkt *p)
{
p->next = q->head;
q->head = p;
if (!q->count++)
q->tail = &p->next;
}
static inline int queue_packet(struct pkt_q *q, struct pkt *p)
{
*(q->tail) = p;
p->next = NULL;
q->tail = &p->next;
return ++q->count;
}
static inline void init_pkt_queue(struct pkt_q *q)
{
q->tail = &q->head;
}
#define DTLS_OVERHEAD (1 /* packet + header */ + 13 /* DTLS header */ + \
20 /* biggest supported MAC (SHA1) */ + 16 /* biggest supported IV (AES-128) */ + \
16 /* max padding */)
#define LINK_TO_TUNNEL_MTU(linkmtu) \
(linkmtu - DTLS_OVERHEAD)
struct esp {
#if defined(OPENCONNECT_GNUTLS)
gnutls_cipher_hd_t cipher;
gnutls_hmac_hd_t hmac;
#elif defined(OPENCONNECT_OPENSSL)
HMAC_CTX *hmac, *pkt_hmac;
EVP_CIPHER_CTX *cipher;
#endif
uint64_t seq_backlog;
uint64_t seq;
uint32_t spi; /* Stored network-endian */
unsigned char secrets[0x40];
};
struct openconnect_info {
const struct vpn_proto *proto;
#ifdef HAVE_ICONV
iconv_t ic_legacy_to_utf8;
iconv_t ic_utf8_to_legacy;
#endif
char *redirect_url;
int redirect_type;
unsigned char esp_hmac;
unsigned char esp_enc;
unsigned char esp_compr;
uint32_t esp_replay_protect;
uint32_t esp_lifetime_bytes;
uint32_t esp_lifetime_seconds;
uint32_t esp_ssl_fallback;
int current_esp_in;
int old_esp_maxseq;
struct esp esp_in[2];
struct esp esp_out;
int tncc_fd; /* For Juniper TNCC */
const char *csd_xmltag;
int csd_nostub;
char *platname;
char *mobile_platform_version;
char *mobile_device_type;
char *mobile_device_uniqueid;
char *csd_token;
char *csd_ticket;
char *csd_stuburl;
char *csd_starturl;
char *csd_waiturl;
char *csd_preurl;
char *csd_scriptname;
xmlNode *opaque_srvdata;
char *profile_url;
char *profile_sha1;
#ifdef LIBPROXY_HDR
pxProxyFactory *proxy_factory;
#endif
char *proxy_type;
char *proxy;
int proxy_port;
int proxy_fd;
char *proxy_user;
char *proxy_pass;
int proxy_close_during_auth;
int retry_on_auth_fail;
int try_http_auth;
struct http_auth_state http_auth[MAX_AUTH_TYPES];
struct http_auth_state proxy_auth[MAX_AUTH_TYPES];
char *localname;
char *hostname;
char *unique_hostname;
int port;
char *urlpath;
int cert_expire_warning;
char *cert;
char *sslkey;
char *cert_password;
char *cafile;
unsigned no_system_trust;
const char *xmlconfig;
char xmlsha1[(SHA1_SIZE * 2) + 1];
char *authgroup;
int nopasswd;
int xmlpost;
char *dtls_ciphers;
char *csd_wrapper;
int no_http_keepalive;
int dump_http_traffic;
int token_mode;
int token_bypassed;
int token_tries;
time_t token_time;
#ifdef HAVE_LIBSTOKEN
struct stoken_ctx *stoken_ctx;
char *stoken_pin;
int stoken_concat_pin;
int stoken_interval;
#endif
#ifdef HAVE_LIBPSKC
pskc_t *pskc;
pskc_key_t *pskc_key;
#endif
char *oath_secret;
size_t oath_secret_len;
enum {
OATH_ALG_HMAC_SHA1 = 0,
OATH_ALG_HMAC_SHA256,
OATH_ALG_HMAC_SHA512,
} oath_hmac_alg;
enum {
HOTP_SECRET_BASE32 = 1,
HOTP_SECRET_RAW,
HOTP_SECRET_HEX,
HOTP_SECRET_PSKC,
} hotp_secret_format; /* We need to give it back in the same form */
#ifdef HAVE_LIBPCSCLITE
SCARDHANDLE pcsc_ctx, pcsc_card;
char *yubikey_objname;
unsigned char yubikey_pwhash[16];
int yubikey_pw_set;
int yubikey_mode;
#endif
openconnect_lock_token_vfn lock_token;
openconnect_unlock_token_vfn unlock_token;
void *tok_cbdata;
void *peer_cert;
char *peer_cert_hash;
void *cert_list_handle;
int cert_list_size;
char *cookie; /* Pointer to within cookies list */
struct oc_vpn_option *cookies;
struct oc_vpn_option *cstp_options;
struct oc_vpn_option *dtls_options;
struct oc_vpn_option *script_env;
struct oc_vpn_option *csd_env;
unsigned pfs;
#if defined(OPENCONNECT_OPENSSL)
#ifdef HAVE_LIBP11
PKCS11_CTX *pkcs11_ctx;
PKCS11_SLOT *pkcs11_slot_list;
unsigned int pkcs11_slot_count;
PKCS11_SLOT *pkcs11_cert_slot;
unsigned char *pkcs11_cert_id;
size_t pkcs11_cert_id_len;
#endif
X509 *cert_x509;
SSL_CTX *https_ctx;
SSL *https_ssl;
#elif defined(OPENCONNECT_GNUTLS)
gnutls_session_t https_sess;
gnutls_certificate_credentials_t https_cred;
char local_cert_md5[MD5_SIZE * 2 + 1]; /* For CSD */
char gnutls_prio[256];
#ifdef HAVE_TROUSERS
TSS_HCONTEXT tpm_context;
TSS_HKEY srk;
TSS_HPOLICY srk_policy;
TSS_HKEY tpm_key;
TSS_HPOLICY tpm_key_policy;
#endif
#ifndef HAVE_GNUTLS_CERTIFICATE_SET_KEY
#ifdef HAVE_P11KIT
gnutls_pkcs11_privkey_t my_p11key;
#endif
gnutls_privkey_t my_pkey;
gnutls_x509_crt_t *my_certs;
uint8_t *free_my_certs;
unsigned int nr_my_certs;
#endif
#endif /* OPENCONNECT_GNUTLS */
struct pin_cache *pin_cache;
struct keepalive_info ssl_times;
int owe_ssl_dpd_response;
int deflate_pkt_size; /* It may need to be larger than MTU */
struct pkt *deflate_pkt; /* For compressing outbound packets into */
struct pkt *pending_deflated_pkt; /* The original packet associated with above */
struct pkt *current_ssl_pkt; /* Partially sent SSL packet */
struct pkt_q oncp_control_queue; /* Control packets to be sent on oNCP next */
int oncp_rec_size; /* For packetising incoming oNCP stream */
/* Packet buffers for receiving into */
struct pkt *cstp_pkt;
struct pkt *dtls_pkt;
struct pkt *tun_pkt;
int pkt_trailer; /* How many bytes after payload for encryption (ESP HMAC) */
z_stream inflate_strm;
uint32_t inflate_adler32;
z_stream deflate_strm;
uint32_t deflate_adler32;
int disable_ipv6;
int reconnect_timeout;
int reconnect_interval;
int dtls_attempt_period;
time_t new_dtls_started;
#if defined(OPENCONNECT_OPENSSL)
SSL_CTX *dtls_ctx;
SSL *dtls_ssl;
#elif defined(OPENCONNECT_GNUTLS)
/* Call this dtls_ssl rather than dtls_sess because it's just a
pointer, and generic code in dtls.c wants to check if it's
NULL or not or pass it to DTLS_SEND/DTLS_RECV. This way we
have fewer ifdefs and accessor macros for it. */
gnutls_session_t dtls_ssl;
char *gnutls_dtls_cipher; /* cached for openconnect_get_dtls_cipher() */
#endif
char *cstp_cipher;
int dtls_state;
int dtls_need_reconnect;
struct keepalive_info dtls_times;
unsigned char dtls_session_id[32];
unsigned char dtls_secret[48];
char *dtls_cipher;
char *vpnc_script;
#ifndef _WIN32
int uid_csd_given;
uid_t uid_csd;
gid_t gid_csd;
uid_t uid;
gid_t gid;
#endif
int use_tun_script;
int script_tun;
char *ifname;
char *cmd_ifname;
int reqmtu, basemtu;
const char *banner;
struct oc_ip_info ip_info;
#ifdef _WIN32
long dtls_monitored, ssl_monitored, cmd_monitored, tun_monitored;
HANDLE dtls_event, ssl_event, cmd_event;
#else
int _select_nfds;
fd_set _select_rfds;
fd_set _select_wfds;
fd_set _select_efds;
#endif
#ifdef __sun__
int ip_fd;
int ip6_fd;
#endif
#ifdef _WIN32
HANDLE tun_fh;
OVERLAPPED tun_rd_overlap, tun_wr_overlap;
int tun_rd_pending;
#else
int tun_fd;
#endif
int ssl_fd;
int dtls_fd;
int dtls_tos_current;
int dtls_pass_tos;
int dtls_tos_proto, dtls_tos_optname;
int cmd_fd;
int cmd_fd_write;
int got_cancel_cmd;
int got_pause_cmd;
char cancel_type;
struct pkt_q incoming_queue;
struct pkt_q outgoing_queue;
int max_qlen;
struct oc_stats stats;
openconnect_stats_vfn stats_handler;
socklen_t peer_addrlen;
struct sockaddr *peer_addr;
struct sockaddr *dtls_addr;
int dtls_local_port;
int req_compr; /* What we requested */
int cstp_compr; /* Accepted for CSTP */
int dtls_compr; /* Accepted for DTLS */
int is_dyndns; /* Attempt to redo DNS lookup on each CSTP reconnect */
char *useragent;
const char *quit_reason;
int verbose;
void *cbdata;
openconnect_validate_peer_cert_vfn validate_peer_cert;
openconnect_write_new_config_vfn write_new_config;
openconnect_process_auth_form_vfn process_auth_form;
openconnect_progress_vfn progress;
openconnect_protect_socket_vfn protect_socket;
openconnect_getaddrinfo_vfn getaddrinfo_override;
openconnect_setup_tun_vfn setup_tun;
openconnect_reconnected_vfn reconnected;
int (*ssl_read)(struct openconnect_info *vpninfo, char *buf, size_t len);
int (*ssl_gets)(struct openconnect_info *vpninfo, char *buf, size_t len);
int (*ssl_write)(struct openconnect_info *vpninfo, char *buf, size_t len);
};
#ifdef _WIN32
#define monitor_read_fd(_v, _n) _v->_n##_monitored |= FD_READ
#define monitor_write_fd(_v, _n) _v->_n##_monitored |= FD_WRITE
#define monitor_except_fd(_v, _n) _v->_n##_monitored |= FD_CLOSE
#define unmonitor_read_fd(_v, _n) _v->_n##_monitored &= ~FD_READ
#define unmonitor_write_fd(_v, _n) _v->_n##_monitored &= ~FD_WRITE
#define unmonitor_except_fd(_v, _n) _v->_n##_monitored &= ~FD_CLOSE
#define monitor_fd_new(_v, _n) do { if (!_v->_n##_event) _v->_n##_event = CreateEvent(NULL, FALSE, FALSE, NULL); } while (0)
#define read_fd_monitored(_v, _n) (_v->_n##_monitored & FD_READ)
#else
#define monitor_read_fd(_v, _n) FD_SET(_v-> _n##_fd, &vpninfo->_select_rfds)
#define unmonitor_read_fd(_v, _n) FD_CLR(_v-> _n##_fd, &vpninfo->_select_rfds)
#define monitor_write_fd(_v, _n) FD_SET(_v-> _n##_fd, &vpninfo->_select_wfds)
#define unmonitor_write_fd(_v, _n) FD_CLR(_v-> _n##_fd, &vpninfo->_select_wfds)
#define monitor_except_fd(_v, _n) FD_SET(_v-> _n##_fd, &vpninfo->_select_efds)
#define unmonitor_except_fd(_v, _n) FD_CLR(_v-> _n##_fd, &vpninfo->_select_efds)
#define monitor_fd_new(_v, _n) do { \
if (_v->_select_nfds <= vpninfo->_n##_fd) \
vpninfo->_select_nfds = vpninfo->_n##_fd + 1; \
} while (0)
#define read_fd_monitored(_v, _n) FD_ISSET(_v->_n##_fd, &_v->_select_rfds)
#endif
/* Packet types */
#define AC_PKT_DATA 0 /* Uncompressed data */
#define AC_PKT_DPD_OUT 3 /* Dead Peer Detection */
#define AC_PKT_DPD_RESP 4 /* DPD response */
#define AC_PKT_DISCONN 5 /* Client disconnection notice */
#define AC_PKT_KEEPALIVE 7 /* Keepalive */
#define AC_PKT_COMPRESSED 8 /* Compressed data */
#define AC_PKT_TERM_SERVER 9 /* Server kick */
#define vpn_progress(_v, lvl, ...) do { \
if ((_v)->verbose >= (lvl)) \
(_v)->progress((_v)->cbdata, lvl, __VA_ARGS__); \
} while(0)
#define vpn_perror(vpninfo, msg) vpn_progress((vpninfo), PRG_ERR, "%s: %s\n", (msg), strerror(errno))
/****************************************************************************/
/* Oh Solaris how we hate thee! */
#ifdef HAVE_SUNOS_BROKEN_TIME
#define time(x) openconnect__time(x)
time_t openconnect__time(time_t *t);
#endif
#ifndef HAVE_VASPRINTF
#define vasprintf openconnect__vasprintf
int openconnect__vasprintf(char **strp, const char *fmt, va_list ap);
#endif
#ifndef HAVE_ASPRINTF
#define asprintf openconnect__asprintf
int openconnect__asprintf(char **strp, const char *fmt, ...);
#endif
#ifndef HAVE_GETLINE
#define getline openconnect__getline
ssize_t openconnect__getline(char **lineptr, size_t *n, FILE *stream);
#endif
#ifndef HAVE_STRCASESTR
#define strcasestr openconnect__strcasestr
char *openconnect__strcasestr(const char *haystack, const char *needle);
#endif
#ifndef HAVE_STRNDUP
#undef strndup
#define strndup openconnect__strndup
char *openconnect__strndup(const char *s, size_t n);
#endif
#ifndef HAVE_INET_ATON
#define inet_aton openconnect__inet_aton
int openconnect__inet_aton(const char *cp, struct in_addr *addr);
#endif
static inline int set_sock_nonblock(int fd)
{
#ifdef _WIN32
unsigned long mode = 1;
return ioctlsocket(fd, FIONBIO, &mode);
#else
return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
#endif
}
static inline int set_fd_cloexec(int fd)
{
#ifdef _WIN32
return 0; /* Windows has O_INHERIT but... */
#else
return fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
#endif
}
static inline int tun_is_up(struct openconnect_info *vpninfo)
{
#ifdef _WIN32
return vpninfo->tun_fh != NULL;
#else
return vpninfo->tun_fd != -1;
#endif
}
#ifdef _WIN32
#define pipe(fds) _pipe(fds, 4096, O_BINARY)
int openconnect__win32_sock_init();
char *openconnect__win32_strerror(DWORD err);
#undef inet_pton
#define inet_pton openconnect__win32_inet_pton
int openconnect__win32_inet_pton(int af, const char *src, void *dst);
#define OPENCONNECT_CMD_SOCKET SOCKET
OPENCONNECT_CMD_SOCKET dumb_socketpair(OPENCONNECT_CMD_SOCKET socks[2], int make_overlapped);
#else
#define closesocket close
#define OPENCONNECT_CMD_SOCKET int
#ifndef O_BINARY
#define O_BINARY 0
#endif
#endif
/* For systems that don't support O_CLOEXEC, just don't bother.
We don't keep files open for long anyway. */
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
/* I always coded as if it worked like this. Now it does. */
#define realloc_inplace(p, size) do { \
void *__realloc_old = p; \
p = realloc(p, size); \
if (size && !p) \
free(__realloc_old); \
} while (0)
/****************************************************************************/
/* iconv.c */
#ifdef HAVE_ICONV
char *openconnect_utf8_to_legacy(struct openconnect_info *vpninfo, const char *utf8);
char *openconnect_legacy_to_utf8(struct openconnect_info *vpninfo, const char *legacy);
#else
#define openconnect_utf8_to_legacy(v, str) ((char *)str)
#define openconnect_legacy_to_utf8(v, str) ((char *)str)
#endif
/* script.c */
unsigned char unhex(const char *data);
int script_setenv(struct openconnect_info *vpninfo, const char *opt, const char *val, int append);
int script_setenv_int(struct openconnect_info *vpninfo, const char *opt, int value);
void prepare_script_env(struct openconnect_info *vpninfo);
int script_config_tun(struct openconnect_info *vpninfo, const char *reason);
int apply_script_env(struct oc_vpn_option *envs);
void free_split_routes(struct openconnect_info *vpninfo);
/* tun.c / tun-win32.c */
void os_shutdown_tun(struct openconnect_info *vpninfo);
int os_read_tun(struct openconnect_info *vpninfo, struct pkt *pkt);
int os_write_tun(struct openconnect_info *vpninfo, struct pkt *pkt);
intptr_t os_setup_tun(struct openconnect_info *vpninfo);
/* dtls.c */
int dtls_setup(struct openconnect_info *vpninfo, int dtls_attempt_period);
int dtls_mainloop(struct openconnect_info *vpninfo, int *timeout);
void dtls_close(struct openconnect_info *vpninfo);
void dtls_shutdown(struct openconnect_info *vpninfo);
void append_dtls_ciphers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
int openconnect_dtls_read(struct openconnect_info *vpninfo, void *buf, size_t len, unsigned ms);
int openconnect_dtls_write(struct openconnect_info *vpninfo, void *buf, size_t len);
/* cstp.c */
void cstp_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
int cstp_connect(struct openconnect_info *vpninfo);
int cstp_mainloop(struct openconnect_info *vpninfo, int *timeout);
int cstp_bye(struct openconnect_info *vpninfo, const char *reason);
int decompress_and_queue_packet(struct openconnect_info *vpninfo, int compr_type,
unsigned char *buf, int len);
int compress_packet(struct openconnect_info *vpninfo, int compr_type, struct pkt *this);
/* auth-juniper.c */
int oncp_obtain_cookie(struct openconnect_info *vpninfo);
void oncp_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
/* oncp.c */
int queue_esp_control(struct openconnect_info *vpninfo, int enable);
int oncp_connect(struct openconnect_info *vpninfo);
int oncp_mainloop(struct openconnect_info *vpninfo, int *timeout);
/* lzs.c */
int lzs_decompress(unsigned char *dst, int dstlen, const unsigned char *src, int srclen);
int lzs_compress(unsigned char *dst, int dstlen, const unsigned char *src, int srclen);
/* ssl.c */
unsigned string_is_hostname(const char* str);
int connect_https_socket(struct openconnect_info *vpninfo);
int __attribute__ ((format(printf, 4, 5)))
request_passphrase(struct openconnect_info *vpninfo, const char *label,
char **response, const char *fmt, ...);
int __attribute__ ((format (printf, 2, 3)))
openconnect_SSL_printf(struct openconnect_info *vpninfo, const char *fmt, ...);
int openconnect_print_err_cb(const char *str, size_t len, void *ptr);
#define openconnect_report_ssl_errors(v) ERR_print_errors_cb(openconnect_print_err_cb, (v))
#if defined(FAKE_ANDROID_KEYSTORE) || defined(__ANDROID__)
#define ANDROID_KEYSTORE
#endif
#ifdef ANDROID_KEYSTORE
const char *keystore_strerror(int err);
int keystore_fetch(const char *key, unsigned char **result);
#endif
void cmd_fd_set(struct openconnect_info *vpninfo, fd_set *fds, int *maxfd);
void check_cmd_fd(struct openconnect_info *vpninfo, fd_set *fds);
int is_cancel_pending(struct openconnect_info *vpninfo, fd_set *fds);
void poll_cmd_fd(struct openconnect_info *vpninfo, int timeout);
int openconnect_open_utf8(struct openconnect_info *vpninfo,
const char *fname, int mode);
FILE *openconnect_fopen_utf8(struct openconnect_info *vpninfo,
const char *fname, const char *mode);
int udp_sockaddr(struct openconnect_info *vpninfo, int port);
int udp_connect(struct openconnect_info *vpninfo);
int ssl_reconnect(struct openconnect_info *vpninfo);
void openconnect_clear_cookies(struct openconnect_info *vpninfo);
/* openssl-pkcs11.c */
int load_pkcs11_key(struct openconnect_info *vpninfo);
int load_pkcs11_certificate(struct openconnect_info *vpninfo);
/* esp.c */
int verify_packet_seqno(struct openconnect_info *vpninfo,
struct esp *esp, uint32_t seq);
int esp_setup(struct openconnect_info *vpninfo, int dtls_attempt_period);
int esp_mainloop(struct openconnect_info *vpninfo, int *timeout);
void esp_close(struct openconnect_info *vpninfo);
void esp_shutdown(struct openconnect_info *vpninfo);
int print_esp_keys(struct openconnect_info *vpninfo, const char *name, struct esp *esp);
/* {gnutls,openssl}-esp.c */
int setup_esp_keys(struct openconnect_info *vpninfo);
void destroy_esp_ciphers(struct esp *esp);
int decrypt_esp_packet(struct openconnect_info *vpninfo, struct esp *esp, struct pkt *pkt);
int encrypt_esp_packet(struct openconnect_info *vpninfo, struct pkt *pkt);
/* {gnutls,openssl}.c */
int ssl_nonblock_read(struct openconnect_info *vpninfo, void *buf, int maxlen);
int ssl_nonblock_write(struct openconnect_info *vpninfo, void *buf, int buflen);
int openconnect_open_https(struct openconnect_info *vpninfo);
void openconnect_close_https(struct openconnect_info *vpninfo, int final);
int cstp_handshake(struct openconnect_info *vpninfo, unsigned init);
int get_cert_md5_fingerprint(struct openconnect_info *vpninfo, void *cert,
char *buf);
int openconnect_sha1(unsigned char *result, void *data, int len);
int openconnect_md5(unsigned char *result, void *data, int len);
int openconnect_random(void *bytes, int len);
int openconnect_local_cert_md5(struct openconnect_info *vpninfo,
char *buf);
int openconnect_yubikey_chalresp(struct openconnect_info *vpninfo,
const void *challenge, int chall_len, void *result);
int openconnect_hash_yubikey_password(struct openconnect_info *vpninfo,
const char *password, int pwlen,
const void *ident, int id_len);
int hotp_hmac(struct openconnect_info *vpninfo, const void *challenge);
#if defined(OPENCONNECT_OPENSSL)
#define openconnect_https_connected(_v) ((_v)->https_ssl)
#elif defined (OPENCONNECT_GNUTLS)
#define openconnect_https_connected(_v) ((_v)->https_sess)
#endif
/* mainloop.c */
int tun_mainloop(struct openconnect_info *vpninfo, int *timeout);
int queue_new_packet(struct pkt_q *q, void *buf, int len);
int keepalive_action(struct keepalive_info *ka, int *timeout);
int ka_stalled_action(struct keepalive_info *ka, int *timeout);
/* xml.c */
ssize_t read_file_into_string(struct openconnect_info *vpninfo, const char *fname,
char **ptr);
int config_lookup_host(struct openconnect_info *vpninfo, const char *host);
/* oath.c */
int set_totp_mode(struct openconnect_info *vpninfo, const char *token_str);
int set_hotp_mode(struct openconnect_info *vpninfo, const char *token_str);
int can_gen_totp_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
int can_gen_hotp_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
int do_gen_totp_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
int do_gen_hotp_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
/* stoken.c */
int prepare_stoken(struct openconnect_info *vpninfo);
int set_libstoken_mode(struct openconnect_info *vpninfo, const char *token_str);
int can_gen_stoken_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
int do_gen_stoken_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
/* yubikey.c */
int set_yubikey_mode(struct openconnect_info *vpninfo, const char *token_str);
int can_gen_yubikey_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
int do_gen_yubikey_code(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
/* auth.c */
int cstp_obtain_cookie(struct openconnect_info *vpninfo);
/* auth-common.c */
int xmlnode_is_named(xmlNode *xml_node, const char *name);
int xmlnode_get_prop(xmlNode *xml_node, const char *name, char **var);
int xmlnode_match_prop(xmlNode *xml_node, const char *name, const char *match);
int append_opt(struct oc_text_buf *body, char *opt, char *name);
int append_form_opts(struct openconnect_info *vpninfo,
struct oc_auth_form *form, struct oc_text_buf *body);
void free_opt(struct oc_form_opt *opt);
void free_auth_form(struct oc_auth_form *form);
int do_gen_tokencode(struct openconnect_info *vpninfo,
struct oc_auth_form *form);
int can_gen_tokencode(struct openconnect_info *vpninfo,
struct oc_auth_form *form,
struct oc_form_opt *opt);
/* http.c */
struct oc_text_buf *buf_alloc(void);
void dump_buf(struct openconnect_info *vpninfo, char prefix, char *buf);
int buf_ensure_space(struct oc_text_buf *buf, int len);
void __attribute__ ((format (printf, 2, 3)))
buf_append(struct oc_text_buf *buf, const char *fmt, ...);
void buf_append_bytes(struct oc_text_buf *buf, const void *bytes, int len);
int buf_append_utf16le(struct oc_text_buf *buf, const char *utf8);
int get_utf8char(const char **utf8);
void buf_append_from_utf16le(struct oc_text_buf *buf, const void *utf16);
void buf_truncate(struct oc_text_buf *buf);
void buf_append_urlencoded(struct oc_text_buf *buf, char *str);
int buf_error(struct oc_text_buf *buf);
int buf_free(struct oc_text_buf *buf);
char *openconnect_create_useragent(const char *base);
int process_proxy(struct openconnect_info *vpninfo, int ssl_sock);
int internal_parse_url(const char *url, char **res_proto, char **res_host,
int *res_port, char **res_path, int default_port);
int do_https_request(struct openconnect_info *vpninfo, const char *method,
const char *request_body_type, struct oc_text_buf *request_body,
char **form_buf, int fetch_redirect);
int http_add_cookie(struct openconnect_info *vpninfo, const char *option,
const char *value, int replace);
int process_http_response(struct openconnect_info *vpninfo, int connect,
int (*header_cb)(struct openconnect_info *, char *, char *),
struct oc_text_buf *body);
int handle_redirect(struct openconnect_info *vpninfo);
void http_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
/* http-auth.c */
void buf_append_base64(struct oc_text_buf *buf, const void *bytes, int len);
void *openconnect_base64_decode(int *len, const char *in);