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Bug #3438

Updated by Alex Afanasyev about 8 years ago

When an identity has a default key, but no associated certificate, signing with the identity will result in generating another key and self-signed certificate.    Instead, a self-signed certificate should be created in this case. 

 To reproduce issue (http://gerrit.named-data.net/#/c/2692/1/tests/unit-tests/security/key-chain.t.cpp@422), 

 ```cpp 
 

     KeyChain keyChain; 
 
     Name ecdsaIdentity = Name("/ndn/test/ecdsa").appendVersion(); 
 
     Name ecdsaKeyName = keyChain.generateEcdsaKeyPairAsDefault(ecdsaIdentity, false, 256); 
 
     BOOST_CHECK_NO_THROW(keyChain.sign(data, signingByIdentity(ecdsaIdentity))); 
 
     BOOST_CHECK_EQUAL(data.getSignature().getType(), 
                   
                       KeyChain::getSignatureType(EcdsaKeyParams().getKeyType(), DIGEST_ALGORITHM_SHA256)); 
 
     BOOST_CHECK(ecdsaIdentity.isPrefixOf(data.getSignature().getKeyLocator().getName())); 
 ``` 

 



 if no certificate is available for the default key and its type does not corresponds to the `DEFAULT_KEY_PARAMS` a new pair of `DEFAULT_KEY_PARAMS` keys is created, set as default and used for 
 signing. Solved by checking the type of key of the default key pair for the identity. 

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