11-08-2018
Server refused our key - Centos 7
I generated rsa key-pair, Using puttygen.exe running on windows, I imported the private key and tried to use it to login to a CentOS Linux release 7.5.1804 (Core) (running on VirtualBox) and it gives the following error: "server refused our key".
I tried to search for solution and some of the recommendations were to chmod of .ssh directory to 700 while authorized_keys is set at 600. I wish to say that I actually created the authorized_keys directory under .ssh directory.
I also generated rsa keys with puttygen.exe and copied the public key to my linux machine and tested, but the error remains.
Please could anyone offer some assistance.
Thanks in advance.
Chiadi
------ Post updated at 12:57 PM ------
Thanks all; got it figured out. The problem was creating a directory instead of a file.
I wish to say that I actually created the authorized_keys directory under .ssh directory.
Thanks all once more.
This User Gave Thanks to Chiadi For This Post:
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LEARN ABOUT OSX
rsa_check_key
RSA_check_key(3) OpenSSL RSA_check_key(3)
NAME
RSA_check_key - validate private RSA keys
SYNOPSIS
#include <openssl/rsa.h>
int RSA_check_key(RSA *rsa);
DESCRIPTION
This function validates RSA keys. It checks that p and q are in fact prime, and that n = p*q.
It also checks that d*e = 1 mod (p-1*q-1), and that dmp1, dmq1 and iqmp are set correctly or are NULL.
As such, this function can not be used with any arbitrary RSA key object, even if it is otherwise fit for regular RSA operation. See NOTES
for more information.
RETURN VALUE
RSA_check_key() returns 1 if rsa is a valid RSA key, and 0 otherwise. -1 is returned if an error occurs while checking the key.
If the key is invalid or an error occurred, the reason code can be obtained using ERR_get_error(3).
NOTES
This function does not work on RSA public keys that have only the modulus and public exponent elements populated. It performs integrity
checks on all the RSA key material, so the RSA key structure must contain all the private key data too.
Unlike most other RSA functions, this function does not work transparently with any underlying ENGINE implementation because it uses the
key data in the RSA structure directly. An ENGINE implementation can override the way key data is stored and handled, and can even provide
support for HSM keys - in which case the RSA structure may contain no key data at all! If the ENGINE in question is only being used for
acceleration or analysis purposes, then in all likelihood the RSA key data is complete and untouched, but this can't be assumed in the
general case.
BUGS
A method of verifying the RSA key using opaque RSA API functions might need to be considered. Right now RSA_check_key() simply uses the RSA
structure elements directly, bypassing the RSA_METHOD table altogether (and completely violating encapsulation and object-orientation in
the process). The best fix will probably be to introduce a "check_key()" handler to the RSA_METHOD function table so that alternative
implementations can also provide their own verifiers.
SEE ALSO
rsa(3), ERR_get_error(3)
HISTORY
RSA_check_key() appeared in OpenSSL 0.9.4.
50 2013-03-05 RSA_check_key(3)