The following is a plaintext key (no passphrase provided).

The new "v1" format contains the header "-----BEGIN OPENSSH PRIVATE KEY-----"
and the footer "-----END OPENSSH PRIVATE KEY-----".

All length ints are uint32, network-byte order.

PEM:
-----BEGIN OPENSSH PRIVATE KEY-----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-----END OPENSSH PRIVATE KEY-----

HEX (only base64 string above):


ANNOTATED HEX:
0 6f70656e7373682d6b65792d763100 ("openssh-key-v1" + 0x00)
1.0 00000004 (4)
	1.0.0 6e6f6e65 ("none")
2.0 00000004 (4)
	2.0.0 6e6f6e65 ("none")
3.0 00000000 (0x00)
	3.0.0 (N/A)
4.0 00000001 (1)