--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/include/libssh2.h	Tue Mar 18 17:55:14 2025 -0400
@@ -0,0 +1,1349 @@
+/* Copyright (c) 2004-2009, Sara Golemon <sarag@libssh2.org>
+ * Copyright (c) 2009-2015 Daniel Stenberg
+ * Copyright (c) 2010 Simon Josefsson <simon@josefsson.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+#ifndef LIBSSH2_H
+#define LIBSSH2_H 1
+
+#define LIBSSH2_COPYRIGHT "2004-2019 The libssh2 project and its contributors."
+
+/* We use underscore instead of dash when appending DEV in dev versions just
+   to make the BANNER define (used by src/session.c) be a valid SSH
+   banner. Release versions have no appended strings and may of course not
+   have dashes either. */
+#define LIBSSH2_VERSION "1.10.0"
+
+/* The numeric version number is also available "in parts" by using these
+   defines: */
+#define LIBSSH2_VERSION_MAJOR 1
+#define LIBSSH2_VERSION_MINOR 10
+#define LIBSSH2_VERSION_PATCH 0
+
+/* This is the numeric version of the libssh2 version number, meant for easier
+   parsing and comparions by programs. The LIBSSH2_VERSION_NUM define will
+   always follow this syntax:
+
+         0xXXYYZZ
+
+   Where XX, YY and ZZ are the main version, release and patch numbers in
+   hexadecimal (using 8 bits each). All three numbers are always represented
+   using two digits.  1.2 would appear as "0x010200" while version 9.11.7
+   appears as "0x090b07".
+
+   This 6-digit (24 bits) hexadecimal number does not show pre-release number,
+   and it is always a greater number in a more recent release. It makes
+   comparisons with greater than and less than work.
+*/
+#define LIBSSH2_VERSION_NUM 0x010a00
+
+/*
+ * This is the date and time when the full source package was created. The
+ * timestamp is not stored in the source code repo, as the timestamp is
+ * properly set in the tarballs by the maketgz script.
+ *
+ * The format of the date should follow this template:
+ *
+ * "Mon Feb 12 11:35:33 UTC 2007"
+ */
+#define LIBSSH2_TIMESTAMP "Sun 29 Aug 2021 08:37:50 PM UTC"
+
+#ifndef RC_INVOKED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifdef _WIN32
+# include <basetsd.h>
+# include <winsock2.h>
+#endif
+
+#include <stddef.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+/* Allow alternate API prefix from CFLAGS or calling app */
+#ifndef LIBSSH2_API
+# ifdef LIBSSH2_WIN32
+#  if defined(_WINDLL) || defined(libssh2_EXPORTS)
+#   ifdef LIBSSH2_LIBRARY
+#    define LIBSSH2_API __declspec(dllexport)
+#   else
+#    define LIBSSH2_API __declspec(dllimport)
+#   endif /* LIBSSH2_LIBRARY */
+#  else
+#   define LIBSSH2_API
+#  endif
+# else /* !LIBSSH2_WIN32 */
+#  define LIBSSH2_API
+# endif /* LIBSSH2_WIN32 */
+#endif /* LIBSSH2_API */
+
+#ifdef HAVE_SYS_UIO_H
+# include <sys/uio.h>
+#endif
+
+#if (defined(NETWARE) && !defined(__NOVELL_LIBC__))
+# include <sys/bsdskt.h>
+typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
+typedef unsigned int uint32_t;
+typedef int int32_t;
+typedef unsigned long long uint64_t;
+typedef long long int64_t;
+#endif
+
+#ifdef _MSC_VER
+typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
+typedef unsigned int uint32_t;
+typedef __int32 int32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+typedef unsigned __int64 libssh2_uint64_t;
+typedef __int64 libssh2_int64_t;
+#if (!defined(HAVE_SSIZE_T) && !defined(ssize_t))
+typedef SSIZE_T ssize_t;
+#define HAVE_SSIZE_T
+#endif
+#else
+#include <stdint.h>
+typedef unsigned long long libssh2_uint64_t;
+typedef long long libssh2_int64_t;
+#endif
+
+#ifdef WIN32
+typedef SOCKET libssh2_socket_t;
+#define LIBSSH2_INVALID_SOCKET INVALID_SOCKET
+#else /* !WIN32 */
+typedef int libssh2_socket_t;
+#define LIBSSH2_INVALID_SOCKET -1
+#endif /* WIN32 */
+
+/*
+ * Determine whether there is small or large file support on windows.
+ */
+
+#if defined(_MSC_VER) && !defined(_WIN32_WCE)
+#  if (_MSC_VER >= 900) && (_INTEGRAL_MAX_BITS >= 64)
+#    define LIBSSH2_USE_WIN32_LARGE_FILES
+#  else
+#    define LIBSSH2_USE_WIN32_SMALL_FILES
+#  endif
+#endif
+
+#if defined(__MINGW32__) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES)
+#  define LIBSSH2_USE_WIN32_LARGE_FILES
+#endif
+
+#if defined(__WATCOMC__) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES)
+#  define LIBSSH2_USE_WIN32_LARGE_FILES
+#endif
+
+#if defined(__POCC__)
+#  undef LIBSSH2_USE_WIN32_LARGE_FILES
+#endif
+
+#if defined(_WIN32) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES) && \
+    !defined(LIBSSH2_USE_WIN32_SMALL_FILES)
+#  define LIBSSH2_USE_WIN32_SMALL_FILES
+#endif
+
+/*
+ * Large file (>2Gb) support using WIN32 functions.
+ */
+
+#ifdef LIBSSH2_USE_WIN32_LARGE_FILES
+#  include <io.h>
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  define LIBSSH2_STRUCT_STAT_SIZE_FORMAT    "%I64d"
+typedef struct _stati64 libssh2_struct_stat;
+typedef __int64 libssh2_struct_stat_size;
+#endif
+
+/*
+ * Small file (<2Gb) support using WIN32 functions.
+ */
+
+#ifdef LIBSSH2_USE_WIN32_SMALL_FILES
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  ifndef _WIN32_WCE
+#    define LIBSSH2_STRUCT_STAT_SIZE_FORMAT    "%d"
+typedef struct _stat libssh2_struct_stat;
+typedef off_t libssh2_struct_stat_size;
+#  endif
+#endif
+
+#ifndef LIBSSH2_STRUCT_STAT_SIZE_FORMAT
+#  ifdef __VMS
+/* We have to roll our own format here because %z is a C99-ism we don't
+   have. */
+#    if __USE_OFF64_T || __USING_STD_STAT
+#      define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%Ld"
+#    else
+#      define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%d"
+#    endif
+#  else
+#    define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%zd"
+#  endif
+typedef struct stat libssh2_struct_stat;
+typedef off_t libssh2_struct_stat_size;
+#endif
+
+/* Part of every banner, user specified or not */
+#define LIBSSH2_SSH_BANNER                  "SSH-2.0-libssh2_" LIBSSH2_VERSION
+
+#define LIBSSH2_SSH_DEFAULT_BANNER            LIBSSH2_SSH_BANNER
+#define LIBSSH2_SSH_DEFAULT_BANNER_WITH_CRLF  LIBSSH2_SSH_DEFAULT_BANNER "\r\n"
+
+/* Default generate and safe prime sizes for
+   diffie-hellman-group-exchange-sha1 */
+#define LIBSSH2_DH_GEX_MINGROUP     2048
+#define LIBSSH2_DH_GEX_OPTGROUP     4096
+#define LIBSSH2_DH_GEX_MAXGROUP     8192
+
+#define LIBSSH2_DH_MAX_MODULUS_BITS 16384
+
+/* Defaults for pty requests */
+#define LIBSSH2_TERM_WIDTH      80
+#define LIBSSH2_TERM_HEIGHT     24
+#define LIBSSH2_TERM_WIDTH_PX   0
+#define LIBSSH2_TERM_HEIGHT_PX  0
+
+/* 1/4 second */
+#define LIBSSH2_SOCKET_POLL_UDELAY      250000
+/* 0.25 * 120 == 30 seconds */
+#define LIBSSH2_SOCKET_POLL_MAXLOOPS    120
+
+/* Maximum size to allow a payload to compress to, plays it safe by falling
+   short of spec limits */
+#define LIBSSH2_PACKET_MAXCOMP      32000
+
+/* Maximum size to allow a payload to deccompress to, plays it safe by
+   allowing more than spec requires */
+#define LIBSSH2_PACKET_MAXDECOMP    40000
+
+/* Maximum size for an inbound compressed payload, plays it safe by
+   overshooting spec limits */
+#define LIBSSH2_PACKET_MAXPAYLOAD   40000
+
+/* Malloc callbacks */
+#define LIBSSH2_ALLOC_FUNC(name)   void *name(size_t count, void **abstract)
+#define LIBSSH2_REALLOC_FUNC(name) void *name(void *ptr, size_t count, \
+                                              void **abstract)
+#define LIBSSH2_FREE_FUNC(name)    void name(void *ptr, void **abstract)
+
+typedef struct _LIBSSH2_USERAUTH_KBDINT_PROMPT
+{
+    char *text;
+    unsigned int length;
+    unsigned char echo;
+} LIBSSH2_USERAUTH_KBDINT_PROMPT;
+
+typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
+{
+    char *text;
+    unsigned int length;
+} LIBSSH2_USERAUTH_KBDINT_RESPONSE;
+
+/* 'publickey' authentication callback */
+#define LIBSSH2_USERAUTH_PUBLICKEY_SIGN_FUNC(name) \
+  int name(LIBSSH2_SESSION *session, unsigned char **sig, size_t *sig_len, \
+           const unsigned char *data, size_t data_len, void **abstract)
+
+/* 'keyboard-interactive' authentication callback */
+#define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) \
+ void name_(const char *name, int name_len, const char *instruction, \
+            int instruction_len, int num_prompts, \
+            const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,              \
+            LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses, void **abstract)
+
+/* Callbacks for special SSH packets */
+#define LIBSSH2_IGNORE_FUNC(name) \
+ void name(LIBSSH2_SESSION *session, const char *message, int message_len, \
+           void **abstract)
+
+#define LIBSSH2_DEBUG_FUNC(name) \
+ void name(LIBSSH2_SESSION *session, int always_display, const char *message, \
+           int message_len, const char *language, int language_len, \
+           void **abstract)
+
+#define LIBSSH2_DISCONNECT_FUNC(name) \
+ void name(LIBSSH2_SESSION *session, int reason, const char *message, \
+           int message_len, const char *language, int language_len, \
+           void **abstract)
+
+#define LIBSSH2_PASSWD_CHANGEREQ_FUNC(name) \
+ void name(LIBSSH2_SESSION *session, char **newpw, int *newpw_len, \
+           void **abstract)
+
+#define LIBSSH2_MACERROR_FUNC(name) \
+ int name(LIBSSH2_SESSION *session, const char *packet, int packet_len, \
+          void **abstract)
+
+#define LIBSSH2_X11_OPEN_FUNC(name) \
+ void name(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel, \
+           const char *shost, int sport, void **abstract)
+
+#define LIBSSH2_CHANNEL_CLOSE_FUNC(name) \
+  void name(LIBSSH2_SESSION *session, void **session_abstract, \
+            LIBSSH2_CHANNEL *channel, void **channel_abstract)
+
+/* I/O callbacks */
+#define LIBSSH2_RECV_FUNC(name)                                         \
+    ssize_t name(libssh2_socket_t socket,                               \
+                 void *buffer, size_t length,                           \
+                 int flags, void **abstract)
+#define LIBSSH2_SEND_FUNC(name)                                         \
+    ssize_t name(libssh2_socket_t socket,                               \
+                 const void *buffer, size_t length,                     \
+                 int flags, void **abstract)
+
+/* libssh2_session_callback_set() constants */
+#define LIBSSH2_CALLBACK_IGNORE             0
+#define LIBSSH2_CALLBACK_DEBUG              1
+#define LIBSSH2_CALLBACK_DISCONNECT         2
+#define LIBSSH2_CALLBACK_MACERROR           3
+#define LIBSSH2_CALLBACK_X11                4
+#define LIBSSH2_CALLBACK_SEND               5
+#define LIBSSH2_CALLBACK_RECV               6
+
+/* libssh2_session_method_pref() constants */
+#define LIBSSH2_METHOD_KEX          0
+#define LIBSSH2_METHOD_HOSTKEY      1
+#define LIBSSH2_METHOD_CRYPT_CS     2
+#define LIBSSH2_METHOD_CRYPT_SC     3
+#define LIBSSH2_METHOD_MAC_CS       4
+#define LIBSSH2_METHOD_MAC_SC       5
+#define LIBSSH2_METHOD_COMP_CS      6
+#define LIBSSH2_METHOD_COMP_SC      7
+#define LIBSSH2_METHOD_LANG_CS      8
+#define LIBSSH2_METHOD_LANG_SC      9
+
+/* flags */
+#define LIBSSH2_FLAG_SIGPIPE        1
+#define LIBSSH2_FLAG_COMPRESS       2
+
+typedef struct _LIBSSH2_SESSION                     LIBSSH2_SESSION;
+typedef struct _LIBSSH2_CHANNEL                     LIBSSH2_CHANNEL;
+typedef struct _LIBSSH2_LISTENER                    LIBSSH2_LISTENER;
+typedef struct _LIBSSH2_KNOWNHOSTS                  LIBSSH2_KNOWNHOSTS;
+typedef struct _LIBSSH2_AGENT                       LIBSSH2_AGENT;
+
+typedef struct _LIBSSH2_POLLFD {
+    unsigned char type; /* LIBSSH2_POLLFD_* below */
+
+    union {
+        libssh2_socket_t socket; /* File descriptors -- examined with
+                                    system select() call */
+        LIBSSH2_CHANNEL *channel; /* Examined by checking internal state */
+        LIBSSH2_LISTENER *listener; /* Read polls only -- are inbound
+                                       connections waiting to be accepted? */
+    } fd;
+
+    unsigned long events; /* Requested Events */
+    unsigned long revents; /* Returned Events */
+} LIBSSH2_POLLFD;
+
+/* Poll FD Descriptor Types */
+#define LIBSSH2_POLLFD_SOCKET       1
+#define LIBSSH2_POLLFD_CHANNEL      2
+#define LIBSSH2_POLLFD_LISTENER     3
+
+/* Note: Win32 Doesn't actually have a poll() implementation, so some of these
+   values are faked with select() data */
+/* Poll FD events/revents -- Match sys/poll.h where possible */
+#define LIBSSH2_POLLFD_POLLIN           0x0001 /* Data available to be read or
+                                                  connection available --
+                                                  All */
+#define LIBSSH2_POLLFD_POLLPRI          0x0002 /* Priority data available to
+                                                  be read -- Socket only */
+#define LIBSSH2_POLLFD_POLLEXT          0x0002 /* Extended data available to
+                                                  be read -- Channel only */
+#define LIBSSH2_POLLFD_POLLOUT          0x0004 /* Can may be written --
+                                                  Socket/Channel */
+/* revents only */
+#define LIBSSH2_POLLFD_POLLERR          0x0008 /* Error Condition -- Socket */
+#define LIBSSH2_POLLFD_POLLHUP          0x0010 /* HangUp/EOF -- Socket */
+#define LIBSSH2_POLLFD_SESSION_CLOSED   0x0010 /* Session Disconnect */
+#define LIBSSH2_POLLFD_POLLNVAL         0x0020 /* Invalid request -- Socket
+                                                  Only */
+#define LIBSSH2_POLLFD_POLLEX           0x0040 /* Exception Condition --
+                                                  Socket/Win32 */
+#define LIBSSH2_POLLFD_CHANNEL_CLOSED   0x0080 /* Channel Disconnect */
+#define LIBSSH2_POLLFD_LISTENER_CLOSED  0x0080 /* Listener Disconnect */
+
+#define HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+/* Block Direction Types */
+#define LIBSSH2_SESSION_BLOCK_INBOUND                  0x0001
+#define LIBSSH2_SESSION_BLOCK_OUTBOUND                 0x0002
+
+/* Hash Types */
+#define LIBSSH2_HOSTKEY_HASH_MD5                            1
+#define LIBSSH2_HOSTKEY_HASH_SHA1                           2
+#define LIBSSH2_HOSTKEY_HASH_SHA256                         3
+
+/* Hostkey Types */
+#define LIBSSH2_HOSTKEY_TYPE_UNKNOWN            0
+#define LIBSSH2_HOSTKEY_TYPE_RSA                1
+#define LIBSSH2_HOSTKEY_TYPE_DSS                2
+#define LIBSSH2_HOSTKEY_TYPE_ECDSA_256          3
+#define LIBSSH2_HOSTKEY_TYPE_ECDSA_384          4
+#define LIBSSH2_HOSTKEY_TYPE_ECDSA_521          5
+#define LIBSSH2_HOSTKEY_TYPE_ED25519            6
+
+/* Disconnect Codes (defined by SSH protocol) */
+#define SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT          1
+#define SSH_DISCONNECT_PROTOCOL_ERROR                       2
+#define SSH_DISCONNECT_KEY_EXCHANGE_FAILED                  3
+#define SSH_DISCONNECT_RESERVED                             4
+#define SSH_DISCONNECT_MAC_ERROR                            5
+#define SSH_DISCONNECT_COMPRESSION_ERROR                    6
+#define SSH_DISCONNECT_SERVICE_NOT_AVAILABLE                7
+#define SSH_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED       8
+#define SSH_DISCONNECT_HOST_KEY_NOT_VERIFIABLE              9
+#define SSH_DISCONNECT_CONNECTION_LOST                      10
+#define SSH_DISCONNECT_BY_APPLICATION                       11
+#define SSH_DISCONNECT_TOO_MANY_CONNECTIONS                 12
+#define SSH_DISCONNECT_AUTH_CANCELLED_BY_USER               13
+#define SSH_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE       14
+#define SSH_DISCONNECT_ILLEGAL_USER_NAME                    15
+
+/* Error Codes (defined by libssh2) */
+#define LIBSSH2_ERROR_NONE                      0
+
+/* The library once used -1 as a generic error return value on numerous places
+   through the code, which subsequently was converted to
+   LIBSSH2_ERROR_SOCKET_NONE uses over time. As this is a generic error code,
+   the goal is to never ever return this code but instead make sure that a
+   more accurate and descriptive error code is used. */
+#define LIBSSH2_ERROR_SOCKET_NONE               -1
+
+#define LIBSSH2_ERROR_BANNER_RECV               -2
+#define LIBSSH2_ERROR_BANNER_SEND               -3
+#define LIBSSH2_ERROR_INVALID_MAC               -4
+#define LIBSSH2_ERROR_KEX_FAILURE               -5
+#define LIBSSH2_ERROR_ALLOC                     -6
+#define LIBSSH2_ERROR_SOCKET_SEND               -7
+#define LIBSSH2_ERROR_KEY_EXCHANGE_FAILURE      -8
+#define LIBSSH2_ERROR_TIMEOUT                   -9
+#define LIBSSH2_ERROR_HOSTKEY_INIT              -10
+#define LIBSSH2_ERROR_HOSTKEY_SIGN              -11
+#define LIBSSH2_ERROR_DECRYPT                   -12
+#define LIBSSH2_ERROR_SOCKET_DISCONNECT         -13
+#define LIBSSH2_ERROR_PROTO                     -14
+#define LIBSSH2_ERROR_PASSWORD_EXPIRED          -15
+#define LIBSSH2_ERROR_FILE                      -16
+#define LIBSSH2_ERROR_METHOD_NONE               -17
+#define LIBSSH2_ERROR_AUTHENTICATION_FAILED     -18
+#define LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED    \
+    LIBSSH2_ERROR_AUTHENTICATION_FAILED
+#define LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED      -19
+#define LIBSSH2_ERROR_CHANNEL_OUTOFORDER        -20
+#define LIBSSH2_ERROR_CHANNEL_FAILURE           -21
+#define LIBSSH2_ERROR_CHANNEL_REQUEST_DENIED    -22
+#define LIBSSH2_ERROR_CHANNEL_UNKNOWN           -23
+#define LIBSSH2_ERROR_CHANNEL_WINDOW_EXCEEDED   -24
+#define LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED   -25
+#define LIBSSH2_ERROR_CHANNEL_CLOSED            -26
+#define LIBSSH2_ERROR_CHANNEL_EOF_SENT          -27
+#define LIBSSH2_ERROR_SCP_PROTOCOL              -28
+#define LIBSSH2_ERROR_ZLIB                      -29
+#define LIBSSH2_ERROR_SOCKET_TIMEOUT            -30
+#define LIBSSH2_ERROR_SFTP_PROTOCOL             -31
+#define LIBSSH2_ERROR_REQUEST_DENIED            -32
+#define LIBSSH2_ERROR_METHOD_NOT_SUPPORTED      -33
+#define LIBSSH2_ERROR_INVAL                     -34
+#define LIBSSH2_ERROR_INVALID_POLL_TYPE         -35
+#define LIBSSH2_ERROR_PUBLICKEY_PROTOCOL        -36
+#define LIBSSH2_ERROR_EAGAIN                    -37
+#define LIBSSH2_ERROR_BUFFER_TOO_SMALL          -38
+#define LIBSSH2_ERROR_BAD_USE                   -39
+#define LIBSSH2_ERROR_COMPRESS                  -40
+#define LIBSSH2_ERROR_OUT_OF_BOUNDARY           -41
+#define LIBSSH2_ERROR_AGENT_PROTOCOL            -42
+#define LIBSSH2_ERROR_SOCKET_RECV               -43
+#define LIBSSH2_ERROR_ENCRYPT                   -44
+#define LIBSSH2_ERROR_BAD_SOCKET                -45
+#define LIBSSH2_ERROR_KNOWN_HOSTS               -46
+#define LIBSSH2_ERROR_CHANNEL_WINDOW_FULL       -47
+#define LIBSSH2_ERROR_KEYFILE_AUTH_FAILED       -48
+#define LIBSSH2_ERROR_RANDGEN                   -49
+
+/* this is a define to provide the old (<= 1.2.7) name */
+#define LIBSSH2_ERROR_BANNER_NONE LIBSSH2_ERROR_BANNER_RECV
+
+/* Global API */
+#define LIBSSH2_INIT_NO_CRYPTO        0x0001
+
+/*
+ * libssh2_init()
+ *
+ * Initialize the libssh2 functions.  This typically initialize the
+ * crypto library.  It uses a global state, and is not thread safe --
+ * you must make sure this function is not called concurrently.
+ *
+ * Flags can be:
+ * 0:                              Normal initialize
+ * LIBSSH2_INIT_NO_CRYPTO:         Do not initialize the crypto library (ie.
+ *                                 OPENSSL_add_cipher_algoritms() for OpenSSL
+ *
+ * Returns 0 if succeeded, or a negative value for error.
+ */
+LIBSSH2_API int libssh2_init(int flags);
+
+/*
+ * libssh2_exit()
+ *
+ * Exit the libssh2 functions and free's all memory used internal.
+ */
+LIBSSH2_API void libssh2_exit(void);
+
+/*
+ * libssh2_free()
+ *
+ * Deallocate memory allocated by earlier call to libssh2 functions.
+ */
+LIBSSH2_API void libssh2_free(LIBSSH2_SESSION *session, void *ptr);
+
+/*
+ * libssh2_session_supported_algs()
+ *
+ * Fills algs with a list of supported acryptographic algorithms. Returns a
+ * non-negative number (number of supported algorithms) on success or a
+ * negative number (an error code) on failure.
+ *
+ * NOTE: on success, algs must be deallocated (by calling libssh2_free) when
+ * not needed anymore
+ */
+LIBSSH2_API int libssh2_session_supported_algs(LIBSSH2_SESSION* session,
+                                               int method_type,
+                                               const char ***algs);
+
+/* Session API */
+LIBSSH2_API LIBSSH2_SESSION *
+libssh2_session_init_ex(LIBSSH2_ALLOC_FUNC((*my_alloc)),
+                        LIBSSH2_FREE_FUNC((*my_free)),
+                        LIBSSH2_REALLOC_FUNC((*my_realloc)), void *abstract);
+#define libssh2_session_init() libssh2_session_init_ex(NULL, NULL, NULL, NULL)
+
+LIBSSH2_API void **libssh2_session_abstract(LIBSSH2_SESSION *session);
+
+LIBSSH2_API void *libssh2_session_callback_set(LIBSSH2_SESSION *session,
+                                               int cbtype, void *callback);
+LIBSSH2_API int libssh2_session_banner_set(LIBSSH2_SESSION *session,
+                                           const char *banner);
+LIBSSH2_API int libssh2_banner_set(LIBSSH2_SESSION *session,
+                                   const char *banner);
+
+LIBSSH2_API int libssh2_session_startup(LIBSSH2_SESSION *session, int sock);
+LIBSSH2_API int libssh2_session_handshake(LIBSSH2_SESSION *session,
+                                          libssh2_socket_t sock);
+LIBSSH2_API int libssh2_session_disconnect_ex(LIBSSH2_SESSION *session,
+                                              int reason,
+                                              const char *description,
+                                              const char *lang);
+#define libssh2_session_disconnect(session, description) \
+  libssh2_session_disconnect_ex((session), SSH_DISCONNECT_BY_APPLICATION, \
+                                (description), "")
+
+LIBSSH2_API int libssh2_session_free(LIBSSH2_SESSION *session);
+
+LIBSSH2_API const char *libssh2_hostkey_hash(LIBSSH2_SESSION *session,
+                                             int hash_type);
+
+LIBSSH2_API const char *libssh2_session_hostkey(LIBSSH2_SESSION *session,
+                                                size_t *len, int *type);
+
+LIBSSH2_API int libssh2_session_method_pref(LIBSSH2_SESSION *session,
+                                            int method_type,
+                                            const char *prefs);
+LIBSSH2_API const char *libssh2_session_methods(LIBSSH2_SESSION *session,
+                                                int method_type);
+LIBSSH2_API int libssh2_session_last_error(LIBSSH2_SESSION *session,
+                                           char **errmsg,
+                                           int *errmsg_len, int want_buf);
+LIBSSH2_API int libssh2_session_last_errno(LIBSSH2_SESSION *session);
+LIBSSH2_API int libssh2_session_set_last_error(LIBSSH2_SESSION* session,
+                                               int errcode,
+                                               const char *errmsg);
+LIBSSH2_API int libssh2_session_block_directions(LIBSSH2_SESSION *session);
+
+LIBSSH2_API int libssh2_session_flag(LIBSSH2_SESSION *session, int flag,
+                                     int value);
+LIBSSH2_API const char *libssh2_session_banner_get(LIBSSH2_SESSION *session);
+
+/* Userauth API */
+LIBSSH2_API char *libssh2_userauth_list(LIBSSH2_SESSION *session,
+                                        const char *username,
+                                        unsigned int username_len);
+LIBSSH2_API int libssh2_userauth_authenticated(LIBSSH2_SESSION *session);
+
+LIBSSH2_API int
+libssh2_userauth_password_ex(LIBSSH2_SESSION *session,
+                             const char *username,
+                             unsigned int username_len,
+                             const char *password,
+                             unsigned int password_len,
+                             LIBSSH2_PASSWD_CHANGEREQ_FUNC
+                             ((*passwd_change_cb)));
+
+#define libssh2_userauth_password(session, username, password) \
+ libssh2_userauth_password_ex((session), (username),           \
+                              (unsigned int)strlen(username),  \
+                              (password), (unsigned int)strlen(password), NULL)
+
+LIBSSH2_API int
+libssh2_userauth_publickey_fromfile_ex(LIBSSH2_SESSION *session,
+                                       const char *username,
+                                       unsigned int username_len,
+                                       const char *publickey,
+                                       const char *privatekey,
+                                       const char *passphrase);
+
+#define libssh2_userauth_publickey_fromfile(session, username, publickey, \
+                                            privatekey, passphrase)     \
+    libssh2_userauth_publickey_fromfile_ex((session), (username),       \
+                                           (unsigned int)strlen(username), \
+                                           (publickey),                 \
+                                           (privatekey), (passphrase))
+
+LIBSSH2_API int
+libssh2_userauth_publickey(LIBSSH2_SESSION *session,
+                           const char *username,
+                           const unsigned char *pubkeydata,
+                           size_t pubkeydata_len,
+                           LIBSSH2_USERAUTH_PUBLICKEY_SIGN_FUNC
+                           ((*sign_callback)),
+                           void **abstract);
+
+LIBSSH2_API int
+libssh2_userauth_hostbased_fromfile_ex(LIBSSH2_SESSION *session,
+                                       const char *username,
+                                       unsigned int username_len,
+                                       const char *publickey,
+                                       const char *privatekey,
+                                       const char *passphrase,
+                                       const char *hostname,
+                                       unsigned int hostname_len,
+                                       const char *local_username,
+                                       unsigned int local_username_len);
+
+#define libssh2_userauth_hostbased_fromfile(session, username, publickey, \
+                                            privatekey, passphrase, hostname) \
+ libssh2_userauth_hostbased_fromfile_ex((session), (username), \
+                                        (unsigned int)strlen(username), \
+                                        (publickey),                    \
+                                        (privatekey), (passphrase),     \
+                                        (hostname),                     \
+                                        (unsigned int)strlen(hostname), \
+                                        (username),                     \
+                                        (unsigned int)strlen(username))
+
+LIBSSH2_API int
+libssh2_userauth_publickey_frommemory(LIBSSH2_SESSION *session,
+                                      const char *username,
+                                      size_t username_len,
+                                      const char *publickeyfiledata,
+                                      size_t publickeyfiledata_len,
+                                      const char *privatekeyfiledata,
+                                      size_t privatekeyfiledata_len,
+                                      const char *passphrase);
+
+/*
+ * response_callback is provided with filled by library prompts array,
+ * but client must allocate and fill individual responses. Responses
+ * array is already allocated. Responses data will be freed by libssh2
+ * after callback return, but before subsequent callback invocation.
+ */
+LIBSSH2_API int
+libssh2_userauth_keyboard_interactive_ex(LIBSSH2_SESSION* session,
+                                         const char *username,
+                                         unsigned int username_len,
+                                         LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(
+                                                       (*response_callback)));
+
+#define libssh2_userauth_keyboard_interactive(session, username,        \
+                                              response_callback)        \
+    libssh2_userauth_keyboard_interactive_ex((session), (username),     \
+                                             (unsigned int)strlen(username), \
+                                             (response_callback))
+
+LIBSSH2_API int libssh2_poll(LIBSSH2_POLLFD *fds, unsigned int nfds,
+                             long timeout);
+
+/* Channel API */
+#define LIBSSH2_CHANNEL_WINDOW_DEFAULT  (2*1024*1024)
+#define LIBSSH2_CHANNEL_PACKET_DEFAULT  32768
+#define LIBSSH2_CHANNEL_MINADJUST       1024
+
+/* Extended Data Handling */
+#define LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL        0
+#define LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE        1
+#define LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE         2
+
+#define SSH_EXTENDED_DATA_STDERR 1
+
+/* Returned by any function that would block during a read/write operation */
+#define LIBSSH2CHANNEL_EAGAIN LIBSSH2_ERROR_EAGAIN
+
+LIBSSH2_API LIBSSH2_CHANNEL *
+libssh2_channel_open_ex(LIBSSH2_SESSION *session, const char *channel_type,
+                        unsigned int channel_type_len,
+                        unsigned int window_size, unsigned int packet_size,
+                        const char *message, unsigned int message_len);
+
+#define libssh2_channel_open_session(session) \
+  libssh2_channel_open_ex((session), "session", sizeof("session") - 1, \
+                          LIBSSH2_CHANNEL_WINDOW_DEFAULT, \
+                          LIBSSH2_CHANNEL_PACKET_DEFAULT, NULL, 0)
+
+LIBSSH2_API LIBSSH2_CHANNEL *
+libssh2_channel_direct_tcpip_ex(LIBSSH2_SESSION *session, const char *host,
+                                int port, const char *shost, int sport);
+#define libssh2_channel_direct_tcpip(session, host, port) \
+  libssh2_channel_direct_tcpip_ex((session), (host), (port), "127.0.0.1", 22)
+
+LIBSSH2_API LIBSSH2_LISTENER *
+libssh2_channel_forward_listen_ex(LIBSSH2_SESSION *session, const char *host,
+                                  int port, int *bound_port,
+                                  int queue_maxsize);
+#define libssh2_channel_forward_listen(session, port) \
+ libssh2_channel_forward_listen_ex((session), NULL, (port), NULL, 16)
+
+LIBSSH2_API int libssh2_channel_forward_cancel(LIBSSH2_LISTENER *listener);
+
+LIBSSH2_API LIBSSH2_CHANNEL *
+libssh2_channel_forward_accept(LIBSSH2_LISTENER *listener);
+
+LIBSSH2_API int libssh2_channel_setenv_ex(LIBSSH2_CHANNEL *channel,
+                                          const char *varname,
+                                          unsigned int varname_len,
+                                          const char *value,
+                                          unsigned int value_len);
+
+#define libssh2_channel_setenv(channel, varname, value)                 \
+    libssh2_channel_setenv_ex((channel), (varname),                     \
+                              (unsigned int)strlen(varname), (value),   \
+                              (unsigned int)strlen(value))
+
+LIBSSH2_API int libssh2_channel_request_auth_agent(LIBSSH2_CHANNEL *channel);
+
+LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel,
+                                               const char *term,
+                                               unsigned int term_len,
+                                               const char *modes,
+                                               unsigned int modes_len,
+                                               int width, int height,
+                                               int width_px, int height_px);
+#define libssh2_channel_request_pty(channel, term)                      \
+    libssh2_channel_request_pty_ex((channel), (term),                   \
+                                   (unsigned int)strlen(term),          \
+                                   NULL, 0,                             \
+                                   LIBSSH2_TERM_WIDTH,                  \
+                                   LIBSSH2_TERM_HEIGHT,                 \
+                                   LIBSSH2_TERM_WIDTH_PX,               \
+                                   LIBSSH2_TERM_HEIGHT_PX)
+
+LIBSSH2_API int libssh2_channel_request_pty_size_ex(LIBSSH2_CHANNEL *channel,
+                                                    int width, int height,
+                                                    int width_px,
+                                                    int height_px);
+#define libssh2_channel_request_pty_size(channel, width, height) \
+  libssh2_channel_request_pty_size_ex((channel), (width), (height), 0, 0)
+
+LIBSSH2_API int libssh2_channel_x11_req_ex(LIBSSH2_CHANNEL *channel,
+                                           int single_connection,
+                                           const char *auth_proto,
+                                           const char *auth_cookie,
+                                           int screen_number);
+#define libssh2_channel_x11_req(channel, screen_number) \
+ libssh2_channel_x11_req_ex((channel), 0, NULL, NULL, (screen_number))
+
+LIBSSH2_API int libssh2_channel_process_startup(LIBSSH2_CHANNEL *channel,
+                                                const char *request,
+                                                unsigned int request_len,
+                                                const char *message,
+                                                unsigned int message_len);
+#define libssh2_channel_shell(channel) \
+  libssh2_channel_process_startup((channel), "shell", sizeof("shell") - 1, \
+                                  NULL, 0)
+#define libssh2_channel_exec(channel, command) \
+  libssh2_channel_process_startup((channel), "exec", sizeof("exec") - 1, \
+                                  (command), (unsigned int)strlen(command))
+#define libssh2_channel_subsystem(channel, subsystem) \
+  libssh2_channel_process_startup((channel), "subsystem",              \
+                                  sizeof("subsystem") - 1, (subsystem), \
+                                  (unsigned int)strlen(subsystem))
+
+LIBSSH2_API ssize_t libssh2_channel_read_ex(LIBSSH2_CHANNEL *channel,
+                                            int stream_id, char *buf,
+                                            size_t buflen);
+#define libssh2_channel_read(channel, buf, buflen) \
+  libssh2_channel_read_ex((channel), 0, (buf), (buflen))
+#define libssh2_channel_read_stderr(channel, buf, buflen) \
+  libssh2_channel_read_ex((channel), SSH_EXTENDED_DATA_STDERR, (buf), (buflen))
+
+LIBSSH2_API int libssh2_poll_channel_read(LIBSSH2_CHANNEL *channel,
+                                          int extended);
+
+LIBSSH2_API unsigned long
+libssh2_channel_window_read_ex(LIBSSH2_CHANNEL *channel,
+                               unsigned long *read_avail,
+                               unsigned long *window_size_initial);
+#define libssh2_channel_window_read(channel) \
+  libssh2_channel_window_read_ex((channel), NULL, NULL)
+
+/* libssh2_channel_receive_window_adjust is DEPRECATED, do not use! */
+LIBSSH2_API unsigned long
+libssh2_channel_receive_window_adjust(LIBSSH2_CHANNEL *channel,
+                                      unsigned long adjustment,
+                                      unsigned char force);
+
+LIBSSH2_API int
+libssh2_channel_receive_window_adjust2(LIBSSH2_CHANNEL *channel,
+                                       unsigned long adjustment,
+                                       unsigned char force,
+                                       unsigned int *storewindow);
+
+LIBSSH2_API ssize_t libssh2_channel_write_ex(LIBSSH2_CHANNEL *channel,
+                                             int stream_id, const char *buf,
+                                             size_t buflen);
+
+#define libssh2_channel_write(channel, buf, buflen) \
+  libssh2_channel_write_ex((channel), 0, (buf), (buflen))
+#define libssh2_channel_write_stderr(channel, buf, buflen)              \
+    libssh2_channel_write_ex((channel), SSH_EXTENDED_DATA_STDERR,       \
+                             (buf), (buflen))
+
+LIBSSH2_API unsigned long
+libssh2_channel_window_write_ex(LIBSSH2_CHANNEL *channel,
+                                unsigned long *window_size_initial);
+#define libssh2_channel_window_write(channel) \
+  libssh2_channel_window_write_ex((channel), NULL)
+
+LIBSSH2_API void libssh2_session_set_blocking(LIBSSH2_SESSION* session,
+                                              int blocking);
+LIBSSH2_API int libssh2_session_get_blocking(LIBSSH2_SESSION* session);
+
+LIBSSH2_API void libssh2_channel_set_blocking(LIBSSH2_CHANNEL *channel,
+                                              int blocking);
+
+LIBSSH2_API void libssh2_session_set_timeout(LIBSSH2_SESSION* session,
+                                             long timeout);
+LIBSSH2_API long libssh2_session_get_timeout(LIBSSH2_SESSION* session);
+
+/* libssh2_channel_handle_extended_data is DEPRECATED, do not use! */
+LIBSSH2_API void libssh2_channel_handle_extended_data(LIBSSH2_CHANNEL *channel,
+                                                      int ignore_mode);
+LIBSSH2_API int libssh2_channel_handle_extended_data2(LIBSSH2_CHANNEL *channel,
+                                                      int ignore_mode);
+
+/* libssh2_channel_ignore_extended_data() is defined below for BC with version
+ * 0.1
+ *
+ * Future uses should use libssh2_channel_handle_extended_data() directly if
+ * LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE is passed, extended data will be read
+ * (FIFO) from the standard data channel
+ */
+/* DEPRECATED */
+#define libssh2_channel_ignore_extended_data(channel, ignore) \
+  libssh2_channel_handle_extended_data((channel),                       \
+                                       (ignore) ?                       \
+                                       LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE : \
+                                       LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL)
+
+#define LIBSSH2_CHANNEL_FLUSH_EXTENDED_DATA     -1
+#define LIBSSH2_CHANNEL_FLUSH_ALL               -2
+LIBSSH2_API int libssh2_channel_flush_ex(LIBSSH2_CHANNEL *channel,
+                                         int streamid);
+#define libssh2_channel_flush(channel) libssh2_channel_flush_ex((channel), 0)
+#define libssh2_channel_flush_stderr(channel) \
+ libssh2_channel_flush_ex((channel), SSH_EXTENDED_DATA_STDERR)
+
+LIBSSH2_API int libssh2_channel_get_exit_status(LIBSSH2_CHANNEL* channel);
+LIBSSH2_API int libssh2_channel_get_exit_signal(LIBSSH2_CHANNEL* channel,
+                                                char **exitsignal,
+                                                size_t *exitsignal_len,
+                                                char **errmsg,
+                                                size_t *errmsg_len,
+                                                char **langtag,
+                                                size_t *langtag_len);
+LIBSSH2_API int libssh2_channel_send_eof(LIBSSH2_CHANNEL *channel);
+LIBSSH2_API int libssh2_channel_eof(LIBSSH2_CHANNEL *channel);
+LIBSSH2_API int libssh2_channel_wait_eof(LIBSSH2_CHANNEL *channel);
+LIBSSH2_API int libssh2_channel_close(LIBSSH2_CHANNEL *channel);
+LIBSSH2_API int libssh2_channel_wait_closed(LIBSSH2_CHANNEL *channel);
+LIBSSH2_API int libssh2_channel_free(LIBSSH2_CHANNEL *channel);
+
+/* libssh2_scp_recv is DEPRECATED, do not use! */
+LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv(LIBSSH2_SESSION *session,
+                                              const char *path,
+                                              struct stat *sb);
+/* Use libssh2_scp_recv2 for large (> 2GB) file support on windows */
+LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv2(LIBSSH2_SESSION *session,
+                                               const char *path,
+                                               libssh2_struct_stat *sb);
+LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_send_ex(LIBSSH2_SESSION *session,
+                                                 const char *path, int mode,
+                                                 size_t size, long mtime,
+                                                 long atime);
+LIBSSH2_API LIBSSH2_CHANNEL *
+libssh2_scp_send64(LIBSSH2_SESSION *session, const char *path, int mode,
+                   libssh2_int64_t size, time_t mtime, time_t atime);
+
+#define libssh2_scp_send(session, path, mode, size) \
+  libssh2_scp_send_ex((session), (path), (mode), (size), 0, 0)
+
+LIBSSH2_API int libssh2_base64_decode(LIBSSH2_SESSION *session, char **dest,
+                                      unsigned int *dest_len,
+                                      const char *src, unsigned int src_len);
+
+LIBSSH2_API
+const char *libssh2_version(int req_version_num);
+
+#define HAVE_LIBSSH2_KNOWNHOST_API 0x010101 /* since 1.1.1 */
+#define HAVE_LIBSSH2_VERSION_API   0x010100 /* libssh2_version since 1.1 */
+
+struct libssh2_knownhost {
+    unsigned int magic;  /* magic stored by the library */
+    void *node; /* handle to the internal representation of this host */
+    char *name; /* this is NULL if no plain text host name exists */
+    char *key;  /* key in base64/printable format */
+    int typemask;
+};
+
+/*
+ * libssh2_knownhost_init
+ *
+ * Init a collection of known hosts. Returns the pointer to a collection.
+ *
+ */
+LIBSSH2_API LIBSSH2_KNOWNHOSTS *
+libssh2_knownhost_init(LIBSSH2_SESSION *session);
+
+/*
+ * libssh2_knownhost_add
+ *
+ * Add a host and its associated key to the collection of known hosts.
+ *
+ * The 'type' argument specifies on what format the given host and keys are:
+ *
+ * plain  - ascii "hostname.domain.tld"
+ * sha1   - SHA1(<salt> <host>) base64-encoded!
+ * custom - another hash
+ *
+ * If 'sha1' is selected as type, the salt must be provided to the salt
+ * argument. This too base64 encoded.
+ *
+ * The SHA-1 hash is what OpenSSH can be told to use in known_hosts files.  If
+ * a custom type is used, salt is ignored and you must provide the host
+ * pre-hashed when checking for it in the libssh2_knownhost_check() function.
+ *
+ * The keylen parameter may be omitted (zero) if the key is provided as a
+ * NULL-terminated base64-encoded string.
+ */
+
+/* host format (2 bits) */
+#define LIBSSH2_KNOWNHOST_TYPE_MASK    0xffff
+#define LIBSSH2_KNOWNHOST_TYPE_PLAIN   1
+#define LIBSSH2_KNOWNHOST_TYPE_SHA1    2 /* always base64 encoded */
+#define LIBSSH2_KNOWNHOST_TYPE_CUSTOM  3
+
+/* key format (2 bits) */
+#define LIBSSH2_KNOWNHOST_KEYENC_MASK     (3<<16)
+#define LIBSSH2_KNOWNHOST_KEYENC_RAW      (1<<16)
+#define LIBSSH2_KNOWNHOST_KEYENC_BASE64   (2<<16)
+
+/* type of key (4 bits) */
+#define LIBSSH2_KNOWNHOST_KEY_MASK         (15<<18)
+#define LIBSSH2_KNOWNHOST_KEY_SHIFT        18
+#define LIBSSH2_KNOWNHOST_KEY_RSA1         (1<<18)
+#define LIBSSH2_KNOWNHOST_KEY_SSHRSA       (2<<18)
+#define LIBSSH2_KNOWNHOST_KEY_SSHDSS       (3<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ECDSA_256    (4<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ECDSA_384    (5<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ECDSA_521    (6<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ED25519      (7<<18)
+#define LIBSSH2_KNOWNHOST_KEY_UNKNOWN      (15<<18)
+
+LIBSSH2_API int
+libssh2_knownhost_add(LIBSSH2_KNOWNHOSTS *hosts,
+                      const char *host,
+                      const char *salt,
+                      const char *key, size_t keylen, int typemask,
+                      struct libssh2_knownhost **store);
+
+/*
+ * libssh2_knownhost_addc
+ *
+ * Add a host and its associated key to the collection of known hosts.
+ *
+ * Takes a comment argument that may be NULL.  A NULL comment indicates
+ * there is no comment and the entry will end directly after the key
+ * when written out to a file.  An empty string "" comment will indicate an
+ * empty comment which will cause a single space to be written after the key.
+ *
+ * The 'type' argument specifies on what format the given host and keys are:
+ *
+ * plain  - ascii "hostname.domain.tld"
+ * sha1   - SHA1(<salt> <host>) base64-encoded!
+ * custom - another hash
+ *
+ * If 'sha1' is selected as type, the salt must be provided to the salt
+ * argument. This too base64 encoded.
+ *
+ * The SHA-1 hash is what OpenSSH can be told to use in known_hosts files.  If
+ * a custom type is used, salt is ignored and you must provide the host
+ * pre-hashed when checking for it in the libssh2_knownhost_check() function.
+ *
+ * The keylen parameter may be omitted (zero) if the key is provided as a
+ * NULL-terminated base64-encoded string.
+ */
+
+LIBSSH2_API int
+libssh2_knownhost_addc(LIBSSH2_KNOWNHOSTS *hosts,
+                       const char *host,
+                       const char *salt,
+                       const char *key, size_t keylen,
+                       const char *comment, size_t commentlen, int typemask,
+                       struct libssh2_knownhost **store);
+
+/*
+ * libssh2_knownhost_check
+ *
+ * Check a host and its associated key against the collection of known hosts.
+ *
+ * The type is the type/format of the given host name.
+ *
+ * plain  - ascii "hostname.domain.tld"
+ * custom - prehashed base64 encoded. Note that this cannot use any salts.
+ *
+ *
+ * 'knownhost' may be set to NULL if you don't care about that info.
+ *
+ * Returns:
+ *
+ * LIBSSH2_KNOWNHOST_CHECK_* values, see below
+ *
+ */
+
+#define LIBSSH2_KNOWNHOST_CHECK_MATCH    0
+#define LIBSSH2_KNOWNHOST_CHECK_MISMATCH 1
+#define LIBSSH2_KNOWNHOST_CHECK_NOTFOUND 2
+#define LIBSSH2_KNOWNHOST_CHECK_FAILURE  3
+
+LIBSSH2_API int
+libssh2_knownhost_check(LIBSSH2_KNOWNHOSTS *hosts,
+                        const char *host, const char *key, size_t keylen,
+                        int typemask,
+                        struct libssh2_knownhost **knownhost);
+
+/* this function is identital to the above one, but also takes a port
+   argument that allows libssh2 to do a better check */
+LIBSSH2_API int
+libssh2_knownhost_checkp(LIBSSH2_KNOWNHOSTS *hosts,
+                         const char *host, int port,
+                         const char *key, size_t keylen,
+                         int typemask,
+                         struct libssh2_knownhost **knownhost);
+
+/*
+ * libssh2_knownhost_del
+ *
+ * Remove a host from the collection of known hosts. The 'entry' struct is
+ * retrieved by a call to libssh2_knownhost_check().
+ *
+ */
+LIBSSH2_API int
+libssh2_knownhost_del(LIBSSH2_KNOWNHOSTS *hosts,
+                      struct libssh2_knownhost *entry);
+
+/*
+ * libssh2_knownhost_free
+ *
+ * Free an entire collection of known hosts.
+ *
+ */
+LIBSSH2_API void
+libssh2_knownhost_free(LIBSSH2_KNOWNHOSTS *hosts);
+
+/*
+ * libssh2_knownhost_readline()
+ *
+ * Pass in a line of a file of 'type'. It makes libssh2 read this line.
+ *
+ * LIBSSH2_KNOWNHOST_FILE_OPENSSH is the only supported type.
+ *
+ */
+LIBSSH2_API int
+libssh2_knownhost_readline(LIBSSH2_KNOWNHOSTS *hosts,
+                           const char *line, size_t len, int type);
+
+/*
+ * libssh2_knownhost_readfile
+ *
+ * Add hosts+key pairs from a given file.
+ *
+ * Returns a negative value for error or number of successfully added hosts.
+ *
+ * This implementation currently only knows one 'type' (openssh), all others
+ * are reserved for future use.
+ */
+
+#define LIBSSH2_KNOWNHOST_FILE_OPENSSH 1
+
+LIBSSH2_API int
+libssh2_knownhost_readfile(LIBSSH2_KNOWNHOSTS *hosts,
+                           const char *filename, int type);
+
+/*
+ * libssh2_knownhost_writeline()
+ *
+ * Ask libssh2 to convert a known host to an output line for storage.
+ *
+ * Note that this function returns LIBSSH2_ERROR_BUFFER_TOO_SMALL if the given
+ * output buffer is too small to hold the desired output.
+ *
+ * This implementation currently only knows one 'type' (openssh), all others
+ * are reserved for future use.
+ *
+ */
+LIBSSH2_API int
+libssh2_knownhost_writeline(LIBSSH2_KNOWNHOSTS *hosts,
+                            struct libssh2_knownhost *known,
+                            char *buffer, size_t buflen,
+                            size_t *outlen, /* the amount of written data */
+                            int type);
+
+/*
+ * libssh2_knownhost_writefile
+ *
+ * Write hosts+key pairs to a given file.
+ *
+ * This implementation currently only knows one 'type' (openssh), all others
+ * are reserved for future use.
+ */
+
+LIBSSH2_API int
+libssh2_knownhost_writefile(LIBSSH2_KNOWNHOSTS *hosts,
+                            const char *filename, int type);
+
+/*
+ * libssh2_knownhost_get()
+ *
+ * Traverse the internal list of known hosts. Pass NULL to 'prev' to get
+ * the first one. Or pass a pointer to the previously returned one to get the
+ * next.
+ *
+ * Returns:
+ * 0 if a fine host was stored in 'store'
+ * 1 if end of hosts
+ * [negative] on errors
+ */
+LIBSSH2_API int
+libssh2_knownhost_get(LIBSSH2_KNOWNHOSTS *hosts,
+                      struct libssh2_knownhost **store,
+                      struct libssh2_knownhost *prev);
+
+#define HAVE_LIBSSH2_AGENT_API 0x010202 /* since 1.2.2 */
+
+struct libssh2_agent_publickey {
+    unsigned int magic;              /* magic stored by the library */
+    void *node;     /* handle to the internal representation of key */
+    unsigned char *blob;           /* public key blob */
+    size_t blob_len;               /* length of the public key blob */
+    char *comment;                 /* comment in printable format */
+};
+
+/*
+ * libssh2_agent_init
+ *
+ * Init an ssh-agent handle. Returns the pointer to the handle.
+ *
+ */
+LIBSSH2_API LIBSSH2_AGENT *
+libssh2_agent_init(LIBSSH2_SESSION *session);
+
+/*
+ * libssh2_agent_connect()
+ *
+ * Connect to an ssh-agent.
+ *
+ * Returns 0 if succeeded, or a negative value for error.
+ */
+LIBSSH2_API int
+libssh2_agent_connect(LIBSSH2_AGENT *agent);
+
+/*
+ * libssh2_agent_list_identities()
+ *
+ * Request an ssh-agent to list identities.
+ *
+ * Returns 0 if succeeded, or a negative value for error.
+ */
+LIBSSH2_API int
+libssh2_agent_list_identities(LIBSSH2_AGENT *agent);
+
+/*
+ * libssh2_agent_get_identity()
+ *
+ * Traverse the internal list of public keys. Pass NULL to 'prev' to get
+ * the first one. Or pass a pointer to the previously returned one to get the
+ * next.
+ *
+ * Returns:
+ * 0 if a fine public key was stored in 'store'
+ * 1 if end of public keys
+ * [negative] on errors
+ */
+LIBSSH2_API int
+libssh2_agent_get_identity(LIBSSH2_AGENT *agent,
+               struct libssh2_agent_publickey **store,
+               struct libssh2_agent_publickey *prev);
+
+/*
+ * libssh2_agent_userauth()
+ *
+ * Do publickey user authentication with the help of ssh-agent.
+ *
+ * Returns 0 if succeeded, or a negative value for error.
+ */
+LIBSSH2_API int
+libssh2_agent_userauth(LIBSSH2_AGENT *agent,
+               const char *username,
+               struct libssh2_agent_publickey *identity);
+
+/*
+ * libssh2_agent_disconnect()
+ *
+ * Close a connection to an ssh-agent.
+ *
+ * Returns 0 if succeeded, or a negative value for error.
+ */
+LIBSSH2_API int
+libssh2_agent_disconnect(LIBSSH2_AGENT *agent);
+
+/*
+ * libssh2_agent_free()
+ *
+ * Free an ssh-agent handle.  This function also frees the internal
+ * collection of public keys.
+ */
+LIBSSH2_API void
+libssh2_agent_free(LIBSSH2_AGENT *agent);
+
+/*
+ * libssh2_agent_set_identity_path()
+ *
+ * Allows a custom agent identity socket path beyond SSH_AUTH_SOCK env
+ *
+ */
+LIBSSH2_API void
+libssh2_agent_set_identity_path(LIBSSH2_AGENT *agent,
+                                const char *path);
+
+/*
+ * libssh2_agent_get_identity_path()
+ *
+ * Returns the custom agent identity socket path if set
+ *
+ */
+LIBSSH2_API const char *
+libssh2_agent_get_identity_path(LIBSSH2_AGENT *agent);
+
+/*
+ * libssh2_keepalive_config()
+ *
+ * Set how often keepalive messages should be sent.  WANT_REPLY
+ * indicates whether the keepalive messages should request a response
+ * from the server.  INTERVAL is number of seconds that can pass
+ * without any I/O, use 0 (the default) to disable keepalives.  To
+ * avoid some busy-loop corner-cases, if you specify an interval of 1
+ * it will be treated as 2.
+ *
+ * Note that non-blocking applications are responsible for sending the
+ * keepalive messages using libssh2_keepalive_send().
+ */
+LIBSSH2_API void libssh2_keepalive_config(LIBSSH2_SESSION *session,
+                                          int want_reply,
+                                          unsigned interval);
+
+/*
+ * libssh2_keepalive_send()
+ *
+ * Send a keepalive message if needed.  SECONDS_TO_NEXT indicates how
+ * many seconds you can sleep after this call before you need to call
+ * it again.  Returns 0 on success, or LIBSSH2_ERROR_SOCKET_SEND on
+ * I/O errors.
+ */
+LIBSSH2_API int libssh2_keepalive_send(LIBSSH2_SESSION *session,
+                                       int *seconds_to_next);
+
+/* NOTE NOTE NOTE
+   libssh2_trace() has no function in builds that aren't built with debug
+   enabled
+ */
+LIBSSH2_API int libssh2_trace(LIBSSH2_SESSION *session, int bitmask);
+#define LIBSSH2_TRACE_TRANS (1<<1)
+#define LIBSSH2_TRACE_KEX   (1<<2)
+#define LIBSSH2_TRACE_AUTH  (1<<3)
+#define LIBSSH2_TRACE_CONN  (1<<4)
+#define LIBSSH2_TRACE_SCP   (1<<5)
+#define LIBSSH2_TRACE_SFTP  (1<<6)
+#define LIBSSH2_TRACE_ERROR (1<<7)
+#define LIBSSH2_TRACE_PUBLICKEY (1<<8)
+#define LIBSSH2_TRACE_SOCKET (1<<9)
+
+typedef void (*libssh2_trace_handler_func)(LIBSSH2_SESSION*,
+                                           void *,
+                                           const char *,
+                                           size_t);
+LIBSSH2_API int libssh2_trace_sethandler(LIBSSH2_SESSION *session,
+                                         void *context,
+                                         libssh2_trace_handler_func callback);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* !RC_INVOKED */
+
+#endif /* LIBSSH2_H */