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Full Discussion: Configuring the SSH keys..
Operating Systems Linux Red Hat Configuring the SSH keys.. Post 302786007 by Corona688 on Tuesday 26th of March 2013 04:24:21 PM
Old 03-26-2013
The client side needs the public and the private key.

The server side needs only the public key, usually appended to ~/.ssh/authorized_keys
 

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libssh2_userauth_publickey_fromfile(3)				  libssh2 manual			    libssh2_userauth_publickey_fromfile(3)

NAME
libssh2_userauth_publickey_fromfile - authenticate a session with a public key, read from a file SYNOPSIS
#include <libssh2.h> int libssh2_userauth_publickey_fromfile_ex(LIBSSH2_SESSION *session, const char *username, const char *publickey, const char *privatekey, const char *passphrase); DESCRIPTION
session - Session instance as returned by libssh2_session_init_ex(3) username - Remote user name to authenticate as. username_len - Length of username. publickey - Path and name of public key file. (e.g. /etc/ssh/hostkey.pub) privatekey - Path and name of private key file. (e.g. /etc/ssh/hostkey) passphrase - Passphrase to use when decoding private key file. Attempt public key authentication using a PEM encoded private key file stored on disk RETURN VALUE
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 isn't really a failure per se. ERRORS
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. SEE ALSO
libssh2_session_init_ex(3) libssh2 0.15 1 Jun 2007 libssh2_userauth_publickey_fromfile(3)
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