libssh2_userauth_publickey_fromfile_ex - authenticate a session with a public key, read from a file

session - Session instance as returned by libssh2_session_init_ex(3)username - Pointer to user name to authenticate as.

       username_len - Length of username.

       publickey  -  Path name of the public key file.  (e.g. /etc/ssh/hostkey.pub). If libssh2 is built against
       OpenSSL, this option can be set to NULL.

       privatekey - Path name of the private key file. (e.g. /etc/ssh/hostkey)

       passphrase - Passphrase to use when decoding privatekey.

       Attempt public key authentication using either a public key file or a PEM encoded private key file stored
       on disk. When providing a private key, the public key is automatically extracted from it. When  providing
       both, the passed public key takes precedence.

LIBSSH2_ERROR_FILE - An issue opening, reading or parsing the disk file.

       LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.

       LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

       LIBSSH2_ERROR_SOCKET_TIMEOUT -

       LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED - The username/public key combination was invalid.

       LIBSSH2_ERROR_AUTHENTICATION_FAILED - Authentication using the supplied public key was not accepted.

       libssh2_userauth_publickey_fromfile_ex - authenticate a session with a public key, read from a file

       Return  0  on  success  or  negative  on failure. It returns LIBSSH2_ERROR_EAGAIN when it would otherwise
       block. While LIBSSH2_ERROR_EAGAIN is a negative number, it is not really a failure per se.

libssh2_session_init_ex(3)

libssh2 0.15                                       1 Jun 2007          libssh2_userauth_publickey_fromfile_ex(3)

       #include <libssh2.h>

       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);