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Re: [Design] RSA keys
From: Andreas Steffen <andreas.steffen(at)strongsec.net>
Date: Tue Mar 18 2003 - 08:52:22 EST
Date: Tue Mar 18 2003 - 08:52:22 EST
OpenSSL uses the PKCS#1 private key format which contains the same elements as the FreeS/WAN private key format with the difference that the encoding is in binary DER format based on the following ASN.1 object definition:
RSAPrivateKey ::= SEQUENCE {
version INTEGER { rsaPrivateKeyVer0(0) }(rsaPrivateKeyVer0),
modulus INTEGER, -- (Usually large) n
publicExponent INTEGER, -- (Usually small) e
privateExponent INTEGER, -- (Usually large) d
prime1 INTEGER, -- (Usually large) p
prime2 INTEGER, -- (Usually large) q
exponent1 INTEGER, -- (Usually large) d mod (p-1)
exponent2 INTEGER, -- (Usually large) d mod (q-1)
coefficient INTEGER -- (Usually large) (inverse of q) mod p
}
To my knowledge nobody has written a tool yet that does the conversion from FreeS/WAN ASCII format into binary DER format.
Such a tool could easily built using either the OpenSSL library or some ASN.1 Perl modules. Unfortunately I haven't found the time yet to do it.
Regards
Andreas
Roberto Barcellona wrote:
> I have to convert the public/private RSA keys format of FreeS/WAN in the RSA
-- ======================================================================= Andreas Steffen e-mail: andreas.steffen@strongsec.com strongSec GmbH home: http://www.strongsec.com Alter Zürichweg 20 phone: +41 1 730 80 64 CH-8952 Schlieren (Switzerland) fax: +41 1 730 80 65 ==========================================[strong internet security]=== Content Security by MailMarshal _______________________________________________ Design mailing list Design@lists.freeswan.org http://lists.freeswan.org/mailman/listinfo/designReceived on Tue Mar 18 09:53:25 2003
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