Mercurial > dropbear
annotate README @ 817:a625f9e135a4
Constant time memcmp for the hmac and password crypt
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Thu, 03 Oct 2013 22:25:30 +0800 |
| parents | 74deece07742 |
| children | f8b28a3de6cb |
| rev | line source |
|---|---|
| 72 | 1 This is Dropbear, a smallish SSH 2 server and client. |
| 701 | 2 https://matt.ucc.asn.au/dropbear/dropbear.html |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
3 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
4 INSTALL has compilation instructions. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
5 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
6 MULTI has instructions on making a multi-purpose binary (ie a single binary |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
7 which performs multiple tasks, to save disk space) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
8 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
9 SMALL has some tips on creating small binaries. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
10 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
11 See TODO for a few of the things I know need looking at, and please contact |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
12 me if you have any questions/bugs found/features/ideas/comments etc :) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
13 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
14 Matt Johnston |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
15 [email protected] |
| 380 | 16 |
| 17 | |
| 75 | 18 In the absence of detailed documentation, some notes follow: |
| 72 | 19 ============================================================================ |
| 20 | |
|
90
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
21 Server public key auth: |
| 72 | 22 |
| 23 You can use ~/.ssh/authorized_keys in the same way as with OpenSSH, just put | |
| 24 the key entries in that file. They should be of the form: | |
| 25 | |
| 26 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAwVa6M6cGVmUcLl2cFzkxEoJd06Ub4bVDsYrWvXhvUV+ZAM9uGuewZBDoAqNKJxoIn0Hyd0Nk/yU99UVv6NWV/5YSHtnf35LKds56j7cuzoQpFIdjNwdxAN0PCET/MG8qyskG/2IE2DPNIaJ3Wy+Ws4IZEgdJgPlTYUBWWtCWOGc= someone@hostname | |
| 27 | |
| 28 You must make sure that ~/.ssh, and the key file, are only writable by the | |
| 290 | 29 user. Beware of editors that split the key into multiple lines. |
| 72 | 30 |
|
717
74deece07742
update text about authorized_keys options
Matt Johnston <matt@ucc.asn.au>
parents:
701
diff
changeset
|
31 Dropbear supports some options for authorized_keys entries, see the manpage. |
| 72 | 32 |
| 75 | 33 ============================================================================ |
| 34 | |
|
90
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
35 Client public key auth: |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
36 |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
37 Dropbear can do public key auth as a client, but you will have to convert |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
38 OpenSSH style keys to Dropbear format, or use dropbearkey to create them. |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
39 |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
40 If you have an OpenSSH-style private key ~/.ssh/id_rsa, you need to do: |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
41 |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
42 dropbearconvert openssh dropbear ~/.ssh/id_rsa ~/.ssh/id_rsa.db |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
43 dbclient -i ~/.ssh/id_rsa.db <hostname> |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
44 |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
45 Currently encrypted keys aren't supported, neither is agent forwarding. At some |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
46 stage both hopefully will be. |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
47 |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
48 ============================================================================ |
|
c2ac796b130e
merge of 00b67a11e33c3ed390556805ed6d1078528bee70
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
49 |
| 75 | 50 If you want to get the public-key portion of a Dropbear private key, look at |
| 51 dropbearkey's '-y' option. | |
| 52 | |
| 53 ============================================================================ | |
| 54 | |
| 72 | 55 To run the server, you need to generate server keys, this is one-off: |
| 56 ./dropbearkey -t rsa -f dropbear_rsa_host_key | |
| 57 ./dropbearkey -t dss -f dropbear_dss_host_key | |
| 58 | |
| 59 or alternatively convert OpenSSH keys to Dropbear: | |
| 60 ./dropbearconvert openssh dropbear /etc/ssh/ssh_host_dsa_key dropbear_dss_host_key | |
| 61 | |
| 75 | 62 ============================================================================ |
| 72 | 63 |
| 64 If the server is run as non-root, you most likely won't be able to allocate a | |
| 65 pty, and you cannot login as any user other than that running the daemon | |
| 66 (obviously). Shadow passwords will also be unusable as non-root. | |
| 67 | |
| 75 | 68 ============================================================================ |
| 69 | |
| 72 | 70 The Dropbear distribution includes a standalone version of OpenSSH's scp |
| 71 program. You can compile it with "make scp", you may want to change the path | |
| 161 | 72 of the ssh binary, specified by _PATH_SSH_PROGRAM in options.h . By default |
| 75 | 73 the progress meter isn't compiled in to save space, you can enable it by |
| 74 adding 'SCPPROGRESS=1' to the make commandline. |