CH-J Toolsserver management over SSH
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Example 07 · ECDSA NIST P-384

ECDSA key on a NIST curve: short keys and fast signatures, common where NIST curves are required, for example with hardware tokens and FIPS policies.

Key overview

Key typeECDSA NIST P-384
SSH algorithm nameecdsa-sha2-nistp384
SupportOpenSSH 5.7 and newer, PuTTY 0.68 and newer
Private key formatOpenSSH (openssh-key-v1), unencrypted
FingerprintSHA256:hYwdECb28DMD8ZsUYHqXkOjKOFEOt8B7trFtHW5Pe30

Public key

The public key in authorized_keys format. Add it to an allowed_signers file to verify the signature below.

Download → 224 bytes

ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF1i9hsj4PrMnZyV0+PgCuIu4PhrgQo5DDxIydYfwmHXAytyr98sAEw7LZhoCPumhr0AInj+4ZdJewLrXfZUM+rs4J/lTCvHYMf3WNEsaPhRUugjpwPhEo5BIhVKxaLw+w== ch-j-ssh-example-07

Private key

The unencrypted private key. Published for testing only: anyone can use it.

Download → 622 bytes

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-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAiAAAABNlY2RzYS
1zaGEyLW5pc3RwMzg0AAAACG5pc3RwMzg0AAAAYQRdYvYbI+D6zJ2cldPj4AriLuD4a4EK
OQw8SMnWH8Jh1wMrcq/fLABMOy2YaAj7poa9ACJ4/uGXSXsC6132VDPq7OCf5Uwrx2DH91
jRLGj4UVLoI6cD4RKOQSIVSsWi8PsAAADgIekwHCHpMBwAAAATZWNkc2Etc2hhMi1uaXN0
cDM4NAAAAAhuaXN0cDM4NAAAAGEEXWL2GyPg+sydnJXT4+AK4i7g+GuBCjkMPEjJ1h/CYd
cDK3Kv3ywATDstmGgI+6aGvQAieP7hl0l7Autd9lQz6uzgn+VMK8dgx/dY0Sxo+FFS6COn
A+ESjkEiFUrFovD7AAAAMEzS/LJsjD3nxJAUuZjk4u9ljsBxrz7vbJqXq5KhoAlhLSCXRn
hKBc97MSekUUziNwAAABNjaC1qLXNzaC1leGFtcGxlLTA3AQIDBAU=
-----END OPENSSH PRIVATE KEY-----

Signature of test_1MB.bin

Detached SSH signature (SSHSIG, namespace "file") of test_1MB.bin made with this key in CH-J Tools. Save it as test_1MB.bin.sig next to the test file.

Download → 476 bytes

-----BEGIN SSH SIGNATURE-----
U1NIU0lHAAAAAQAAAIgAAAATZWNkc2Etc2hhMi1uaXN0cDM4NAAAAAhuaXN0cDM4NAAAAG
EEXWL2GyPg+sydnJXT4+AK4i7g+GuBCjkMPEjJ1h/CYdcDK3Kv3ywATDstmGgI+6aGvQAi
eP7hl0l7Autd9lQz6uzgn+VMK8dgx/dY0Sxo+FFS6COnA+ESjkEiFUrFovD7AAAABGZpbG
UAAAAAAAAABnNoYTUxMgAAAIMAAAATZWNkc2Etc2hhMi1uaXN0cDM4NAAAAGgAAAAwC/fD
9v6o9qtaFZT2k5K0nuZqE5OgIIecTBXB0AvT4BfCDrmzvkItLLewzUa9IsW8AAAAMEVfLB
KaS6XqmdCqSlz2pXzDbhyfhH+hrHHw+1TiYLd6wc4UlQMa91QtOg0MqJ5zbA==
-----END SSH SIGNATURE-----

Revocation

SSH keys have no revocation certificate. To withdraw a key, remove it from authorized_keys, or list it in an OpenSSH key revocation list (KRL, created with ssh-keygen -k) that the server reads through RevokedKeys.

Verify the signature

Save the public key and the signature next to test_1MB.bin, create an allowed_signers file and run ssh-keygen:

echo "example@ch-j $(cat id_ecdsa.pub)" > allowed_signers
ssh-keygen -Y verify -f allowed_signers -I example@ch-j -n file -s test_1MB.bin.sig < test_1MB.bin