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CSCG 2024 Challenge 'Guacamole Mashup'
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libssh2_userauth_keyboard_interactive_ex.3 (2344B)

      1.TH libssh2_userauth_keyboard_interactive_ex 3 "8 Mar 2008" "libssh2 0.19" "libssh2"
      2.SH NAME
      3libssh2_userauth_keyboard_interactive_ex - authenticate a session using
      4keyboard-interactive authentication
      5.SH SYNOPSIS
      6.nf
      7#include <libssh2.h>
      8
      9int
     10libssh2_userauth_keyboard_interactive_ex(LIBSSH2_SESSION *session,
     11                                         const char *username,
     12                                         unsigned int username_len,
     13                   LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(*response_callback));
     14.fi
     15.SH DESCRIPTION
     16\fIsession\fP - Session instance as returned by
     17\fIlibssh2_session_init_ex(3)\fP.
     18
     19\fIusername\fP - Name of user to attempt keyboard-interactive authentication
     20for.
     21
     22\fIusername_len\fP - Length of username parameter.
     23
     24\fIresponse_callback\fP - As authentication proceeds, the host issues several
     25(1 or more) challenges and requires responses. This callback will be called at
     26this moment. The callback is responsible to obtain responses for the
     27challenges, fill the provided data structure and then return
     28control. Responses will be sent to the host. String values will be free(3)ed
     29by the library. The callback prototype must match this:
     30
     31.nf
     32void response(const char *name,
     33              int name_len, const char *instruction,
     34              int instruction_len,
     35              int num_prompts,
     36              const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
     37              LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
     38              void **abstract);
     39.fi
     40
     41Attempts keyboard-interactive (challenge/response) authentication.
     42
     43Note that many SSH servers will always issue a single "password" challenge,
     44requesting actual password as response, but it is not required by the
     45protocol, and various authentication schemes, such as smartcard authentication
     46may use keyboard-interactive authentication type too.
     47.SH RETURN VALUE
     48Return 0 on success or negative on failure.  It returns LIBSSH2_ERROR_EAGAIN
     49when it would otherwise block. While LIBSSH2_ERROR_EAGAIN is a negative
     50number, it is not really a failure per se.
     51.SH ERRORS
     52\fILIBSSH2_ERROR_ALLOC\fP -  An internal memory allocation call failed.
     53
     54\fILIBSSH2_ERROR_SOCKET_SEND\fP - Unable to send data on socket.
     55
     56\fILIBSSH2_ERROR_AUTHENTICATION_FAILED\fP - failed, invalid username/password
     57or public/private key.
     58.SH SEE ALSO
     59.BR libssh2_session_init_ex(3)