You receive the following error when testing your connection after using an upgraded sshkeygen
tool to generate SSH keys in OPENSSH format. OPENSSH is a proprietary format. Oracle Integration requires the keys to be in PEM format.
The following format is not supported. You must regenerate your keys in PEM format.
m PEM
with sshkeygen
to generate private keys in PEM format:RSA is the most widespread and used public key algorithm. Its security isbased on the difficulty of factoring large integers. The algorithm haswithstood attacks for more than 30 years, and it is therefore consideredreasonably secure for new designs.
However it returns me not a public key in a.pem format but, according to the datasheet, it returns me the coordinates X and Y of the public key, which are 64 bytes. X and Y coordinates are not components of an RSA public key. Together they are usually indicating a point on an elliptic curve though. What you are likely getting is a flat. In this example you will learn how to generate RSAOAEP key pair and how to convert private key from this key pair to base64 so you can use it with OpenSSL etc. Please note that this process can also be used for public key you just have to use prefix and suffix below.
C: Openssl bin openssl.exe rsa in PEM Key Filename out Key Filename Where: PEM Key Filename is the input filename of the incompatible traditional format PEM encoded private key. Sshkeygen f idrsa e m pem This will convert your public key to an OpenSSL compatible format. I need to use the PEM formatted public key for some purpose, but not finding the command which can convert DER formatted public key to PEM formatted public key. The command I have used  openssl rsa in useridrsa.pub inform DER outform PEM out pubkey.pem. The RSA key to import. The following formats are supported for an RSA public key: X.509 certificate (binary or PEM format) X.509 subjectPublicKeyInfo DER SEQUENCE (binary or PEM encoding) PKCS#1 RSAPublicKey DER SEQUENCE (binary or PEM encoding) An OpenSSH line (e.g. The content of /.ssh/idecdsa, ASCII).
The algorithm can be used for both confidentiality (encryption) andauthentication (digital signature). It is worth noting that signing anddecryption are significantly slower than verification and encryption.
The cryptographic strength is primarily linked to the length of the RSA modulus n.In 2017, a sufficient length is deemed to be 2048 bits. For more information,see the most recent ECRYPT report.
Both RSA ciphertexts and RSA signatures are as large as the RSA modulus n (256bytes if n is 2048 bit long).
The module Crypto.PublicKey.RSA
provides facilities for generating new RSA keys,reconstructing them from known components, exporting them, and importing them.
As an example, this is how you generate a new RSA key pair, save it in a filecalled mykey.pem
, and then read it back:
Crypto.PublicKey.RSA.
generate
(bits, randfunc=None, e=65537)¶Create a new RSA key pair.
The algorithm closely follows NIST FIPS 1864 in itssections B.3.1 and B.3.3. The modulus is the product oftwo nonstrong probable primes.Each prime passes a suitable number of MillerRabin testswith random bases and a single Lucas test.
Parameters: 


Returns: an RSA key object (RsaKey
, with private key).
Crypto.PublicKey.RSA.
construct
(rsa_components, consistency_check=True)¶Construct an RSA key from a tuple of valid RSA components.
The modulus n must be the product of two primes.The public exponent e must be odd and larger than 1.
In case of a private key, the following equations must apply:
Parameters: 


Raises: 

Returns: An RSA key object (RsaKey
).
Crypto.PublicKey.RSA.
import_key
(extern_key, passphrase=None)¶Import an RSA key (public or private).
Parameters: 


Returns: An RSA key object (RsaKey
).
Raises:  ValueError/IndexError/TypeError – When the given key cannot be parsed (possibly because the passphrase is wrong). 

Crypto.PublicKey.RSA.
RsaKey
(**kwargs)¶Class defining an actual RSA key.Do not instantiate directly.Use generate()
, construct()
or import_key()
instead.
Variables: 


exportKey
(format='PEM', passphrase=None, pkcs=1, protection=None, randfunc=None)¶Export this RSA key.
Parameters: 


Returns:  the encoded key 
Return type:  byte string 
Raises: 

Warning
If you don’t provide a pass phrase, the private key will beexported in the clear!
export_key
(format='PEM', passphrase=None, pkcs=1, protection=None, randfunc=None)¶Export this RSA key.
Parameters: 


Returns:  the encoded key 
Return type:  byte string 
Raises: 

Warning
If you don’t provide a pass phrase, the private key will beexported in the clear!
has_private
()¶Whether this is an RSA private key
publickey
()¶A matching RSA public key.
Returns:  a new RsaKey object 

size_in_bits
()¶Size of the RSA modulus in bits
size_in_bytes
()¶The minimal amount of bytes that can hold the RSA modulus
Crypto.PublicKey.RSA.
oid
= '1.2.840.113549.1.1.1'¶Object ID for the RSA encryption algorithm. This OID often indicatesa generic RSA key, even when such key will be actually used for digitalsignatures.