Crypto++ Faq-O-Matic: How can I use an RSA key from Crypto++ in openssl?

	Crypto++ Faq-O-Matic : How can I use an RSA key from Crypto++ in openssl?
	Moderator: weidai (inherited from parent)
	An RSA key generated with Crypto++ encoded with DER can be used in openssl if the key is specified to be PKCS#8 encoded. For example if a 4096 bit RSA public key is generated with: AutoSeededRandomPool rng; RSAES_OAEP_SHA_Decryptor priv(rng, 4096); TransparentFilter privFile(new FileSink("rsakey.der")); priv.DEREncode(privFile); privFile.MessageEnd(); The key can be converted by openssl with: `openssl pkcs8 -in rsakey.der -inform DER -out rsakey.pem -nocrypt` Furthermore, the key can now be verified as a valid RSA key with: `openssl rsa -in rsakey.pem -check` See the openssl man page for more information about using openssl. 2001-Oct-29 10:56pm mschatz, weidai
	See http://www.cryptopp.com/wiki/Basic_Encoding_Rules for more information related to key format. 2007-Dec-09 6:36pm weidai
	[Append to This Answer]
	2007-Dec-09 6:36pm

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