Louis Berube created SSHD-934:
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Summary: Invalid public key encoding of certain ecdsa-sha2-nistpX
host keys
Key: SSHD-934
URL: https://issues.apache.org/jira/browse/SSHD-934
Project: MINA SSHD
Issue Type: Bug
Affects Versions: 1.2.0, 2.1.0
Reporter: Louis Berube
Attachments: ECDSA-encode-decode-junit-fragment.txt
There appears to be an error in encoding the public part of certain ECDSA host
key values. The bug has been found to affect the ecdsa-sha2-nistpX host key
algorithms.
The bug affects the different ECDSA host key types to different degrees.
Usually when one generates a host key value it will work okay. However, if one
repeatedly generates new host key values then eventually a value will be
generated for which the encoding is not calculated correctly:
* For ecdsa-sha2-nistp512: within ~10 repetitions
* For ecdsa-sha2-nistp256: within ~200 repetitions
* For ecdsa-sha2-nistp384: within ~1000 repetitions
The attached Junit test code fragment was used to generate the above statistics.
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