[pycrypto] PyCrypto AND Crypt_RSA integration

[Mads Kiilerich]

Mauricio Arozi wrote, On 02/06/2009 07:53 PM:
> Hello,
> I'm trying to import/export keys from/to Crypt_RSA 
> <http://pear.php.net/package/Crypt_RSA>, using PyCrypto 
> <http://www.dlitz.net/software/pycrypto/>. My problem is that while 
> using PyCrypto to generate both public and private keys, the 
> e(exponent?) is always the same.
> According to this site: http://pajhome.org.uk/crypt/rsa/rsa.html, and 
> yet others, the e(exponent?) is used for the public key, and d for the 
> private key.

Yes, many implementations and applications of RSA uses a fixed exponent 
- very often 65537 (F4). Usually that is a good decision and no problem 
- perhaps except for interoperability.

And yes, interoperability is often very hard when implementing crypto 
stuff. IMHO an important criteria when selecting a crypto library is 
having examples / proof of how it interoperates with other implementations.

It is not clear to me exactly what you are asking for, so I can't answer 
that directly - I hope someone else can do that.

/Mads
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3435 bytes
Desc: S/MIME Cryptographic Signature
Url : http://lists.dlitz.net/pipermail/pycrypto/attachments/20090207/8b240f70/attachment.bin