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Does the right half of the rsa public key matter?
Announcing the arrival of Valued Associate #679: Cesar Manara
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In a public key file "id_rsa.pub" generated by ssh-keygen, does the part after the == matter?
I ask because when I changed "root@somedomain.com" to "root", it seems to still work.
More generally, I am curious about what the purpose of that half is.
ssh openssh pgp public-key-encryption
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
add a comment |
In a public key file "id_rsa.pub" generated by ssh-keygen, does the part after the == matter?
I ask because when I changed "root@somedomain.com" to "root", it seems to still work.
More generally, I am curious about what the purpose of that half is.
ssh openssh pgp public-key-encryption
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
add a comment |
In a public key file "id_rsa.pub" generated by ssh-keygen, does the part after the == matter?
I ask because when I changed "root@somedomain.com" to "root", it seems to still work.
More generally, I am curious about what the purpose of that half is.
ssh openssh pgp public-key-encryption
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
In a public key file "id_rsa.pub" generated by ssh-keygen, does the part after the == matter?
I ask because when I changed "root@somedomain.com" to "root", it seems to still work.
More generally, I am curious about what the purpose of that half is.
ssh openssh pgp public-key-encryption
ssh openssh pgp public-key-encryption
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
asked Dec 9 '12 at 8:48
merlin2011merlin2011
71431023
71431023
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
This right part of a public key (either "id_rsa.pub" or "id_dsa.pub") is just a comment and is usually filled with the < login>@< hostname> who generated the key.
This in a way similar to the comment field from the SSH Public Key File Format (see RFC 4716).
So, as being purely informational and optional, you can change it to whatever you like, but keeping the < login>@< hostname> is a practical way to keep track of what is what.
For more about OpenSSH "authorized_keys" format:
- OpenBSD sshd man page - "AUTHORIZED_KEYS"
edited 5 hours ago
maxwellb
915410
answered Dec 9 '12 at 9:47
OukiOuki
97711111
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
2
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
add a comment |
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1 Answer
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1 Answer
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votes
This right part of a public key (either "id_rsa.pub" or "id_dsa.pub") is just a comment and is usually filled with the < login>@< hostname> who generated the key.
This in a way similar to the comment field from the SSH Public Key File Format (see RFC 4716).
So, as being purely informational and optional, you can change it to whatever you like, but keeping the < login>@< hostname> is a practical way to keep track of what is what.
For more about OpenSSH "authorized_keys" format:
- OpenBSD sshd man page - "AUTHORIZED_KEYS"
edited 5 hours ago
maxwellb
915410
answered Dec 9 '12 at 9:47
OukiOuki
97711111
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
2
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
add a comment |
This right part of a public key (either "id_rsa.pub" or "id_dsa.pub") is just a comment and is usually filled with the < login>@< hostname> who generated the key.
This in a way similar to the comment field from the SSH Public Key File Format (see RFC 4716).
So, as being purely informational and optional, you can change it to whatever you like, but keeping the < login>@< hostname> is a practical way to keep track of what is what.
For more about OpenSSH "authorized_keys" format:
- OpenBSD sshd man page - "AUTHORIZED_KEYS"
edited 5 hours ago
maxwellb
915410
answered Dec 9 '12 at 9:47
OukiOuki
97711111
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
2
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
add a comment |
This right part of a public key (either "id_rsa.pub" or "id_dsa.pub") is just a comment and is usually filled with the < login>@< hostname> who generated the key.
This in a way similar to the comment field from the SSH Public Key File Format (see RFC 4716).
So, as being purely informational and optional, you can change it to whatever you like, but keeping the < login>@< hostname> is a practical way to keep track of what is what.
For more about OpenSSH "authorized_keys" format:
- OpenBSD sshd man page - "AUTHORIZED_KEYS"
edited 5 hours ago
maxwellb
915410
answered Dec 9 '12 at 9:47
OukiOuki
97711111
This right part of a public key (either "id_rsa.pub" or "id_dsa.pub") is just a comment and is usually filled with the < login>@< hostname> who generated the key.
This in a way similar to the comment field from the SSH Public Key File Format (see RFC 4716).
So, as being purely informational and optional, you can change it to whatever you like, but keeping the < login>@< hostname> is a practical way to keep track of what is what.
For more about OpenSSH "authorized_keys" format:
- OpenBSD sshd man page - "AUTHORIZED_KEYS"
edited 5 hours ago
maxwellb
915410
answered Dec 9 '12 at 9:47
OukiOuki
97711111
edited 5 hours ago
maxwellb
915410
edited 5 hours ago
maxwellb
915410
edited 5 hours ago
maxwellb
915410
915410
answered Dec 9 '12 at 9:47
OukiOuki
97711111
answered Dec 9 '12 at 9:47
OukiOuki
97711111
answered Dec 9 '12 at 9:47
OukiOuki
97711111
97711111
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
2
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
add a comment |
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
2
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
Is there an RFC or similar document for this format as well? I've seen other funny things in these authorized_keys files as well, such as actual commands.
– merlin2011
Dec 9 '12 at 9:53
2
2
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
This format seems openssh specific... but one of the most widely used. You can find some info about it in the openssh sshd manpage, in the "AUTHORIZED_KEYS FILE FORMAT" section.
– Ouki
Dec 9 '12 at 10:02
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
The openssh sshd manpage is now at http://www.freebsd.org/cgi/man.cgi?sshd(8)
– Chirael
Jul 1 '16 at 17:11
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
OpenSSH reference should be OpenBSD, not FreeBSD. Here is the right man page: openssh sshd manpage
– Ouki
Jul 1 '16 at 19:49
add a comment |
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