dropbear: README annotate

annotate README @ 452:4cab61369879

Prevent invalid packets being sent during key-exchange, instead queue them until afterwards. This could sometimes terminate connections after 8 hours if (for example) a new TCP forwarded connection was sent at the KEX timeout.

author	Matt Johnston <matt@ucc.asn.au>
date	Fri, 27 Jul 2007 17:13:42 +0000
parents	0cbe8f6dbf9e
children	20dafc77322e

rev	line source
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	1 This is Dropbear, a smallish SSH 2 server and client.
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 INSTALL has compilation instructions.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 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	6 which performs multiple tasks, to save disk space)
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 SMALL has some tips on creating small binaries.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 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	11 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	12
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 Matt Johnston
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 [email protected]
380 d5faf4814ddb Update to LibTomCrypt 1.16 Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15
d5faf4814ddb Update to LibTomCrypt 1.16 Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16
75 a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	17 In the absence of detailed documentation, some notes follow:
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	18 ============================================================================
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	19
90 c2ac796b130e merge of 00b67a11e33c3ed390556805ed6d1078528bee70 Matt Johnston <matt@ucc.asn.au> parents: 75 diff changeset	20 Server public key auth:
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	21
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	22 You can use ~/.ssh/authorized_keys in the same way as with OpenSSH, just put
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	23 the key entries in that file. They should be of the form:
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	24
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	25 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAwVa6M6cGVmUcLl2cFzkxEoJd06Ub4bVDsYrWvXhvUV+ZAM9uGuewZBDoAqNKJxoIn0Hyd0Nk/yU99UVv6NWV/5YSHtnf35LKds56j7cuzoQpFIdjNwdxAN0PCET/MG8qyskG/2IE2DPNIaJ3Wy+Ws4IZEgdJgPlTYUBWWtCWOGc= someone@hostname
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	26
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	27 You must make sure that ~/.ssh, and the key file, are only writable by the
290 94ee16f5b8a8 0.48 progress Matt Johnston <matt@ucc.asn.au> parents: 161 diff changeset	28 user. Beware of editors that split the key into multiple lines.
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	29
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	30 NOTE: Dropbear ignores authorized_keys options such as those described in the
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	31 OpenSSH sshd manpage, and will not allow a login for these keys.
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	32
75 a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	33 ============================================================================
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	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 a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	50 If you want to get the public-key portion of a Dropbear private key, look at
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	51 dropbearkey's '-y' option.
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	52
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	53 ============================================================================
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	54
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	55 To run the server, you need to generate server keys, this is one-off:
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	56 ./dropbearkey -t rsa -f dropbear_rsa_host_key
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	57 ./dropbearkey -t dss -f dropbear_dss_host_key
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	58
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	59 or alternatively convert OpenSSH keys to Dropbear:
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	60 ./dropbearconvert openssh dropbear /etc/ssh/ssh_host_dsa_key dropbear_dss_host_key
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	61
75 a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	62 ============================================================================
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	63
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	64 If the server is run as non-root, you most likely won't be able to allocate a
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	65 pty, and you cannot login as any user other than that running the daemon
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	66 (obviously). Shadow passwords will also be unusable as non-root.
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	67
75 a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	68 ============================================================================
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	69
72 9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	70 The Dropbear distribution includes a standalone version of OpenSSH's scp
9597c2e3b9d4 Some doc changes Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	71 program. You can compile it with "make scp", you may want to change the path
161 b9d3f725e00b 0.44 release changes Matt Johnston <matt@ucc.asn.au> parents: 90 diff changeset	72 of the ssh binary, specified by _PATH_SSH_PROGRAM in options.h . By default
75 a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	73 the progress meter isn't compiled in to save space, you can enable it by
a54d20c96178 Some documentation touchups Matt Johnston <matt@ucc.asn.au> parents: 72 diff changeset	74 adding 'SCPPROGRESS=1' to the make commandline.

Mercurial > dropbear

annotate README @ 452:4cab61369879