[ pycrypto-Bugs-1728610 ] Check result of can_sign() for public keys

Bugs item #1728610, was opened at 2007-05-30 14:39
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Check result of can_sign() for public keys

Initial Comment:
In the case of calling can_sign() applied to a PUBLIC key:

publicKey.can_sign()

its result is True, even though signatures can be performed by private key only.

I've noticed this behaviour for DSA and qNEW algorithms.
However, if I try to sign a message using sign() and the PUBLIC key, the expected error message is issued. So sign() function seems to be fine.

Mail: [email protected]

Thank you

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