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2015-05-05 20:39:14 +02:00
debian changelog for 2015.67 2015-01-28 22:54:23 +08:00
libtomcrypt Fix unused but set variable warnings [-Werror=unused-but-set-variable] 2015-05-05 20:39:13 +02:00
libtommath fix out-of-tree cleaning 2012-04-08 02:06:54 -04:00
.hgsigs Added signature for changeset 1d2d81b1b7c1 2015-01-29 21:42:01 +08:00
.hgtags Added tag DROPBEAR_2015.67 for changeset cbd674d63cd4 2015-01-28 22:55:27 +08:00
.travis.yml fix travis more 2015-05-02 22:59:55 +08:00
agentfwd.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
algo.h Turn Algo_Type's name attribute into const char * 2015-05-05 20:39:14 +02:00
atomicio.c
atomicio.h
auth.h Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
bignum.c Various cleanups and fixes for warnings 2013-11-12 23:02:32 +08:00
bignum.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
buffer.c allocate buffer and data in a single allocation 2015-03-01 21:16:09 +08:00
buffer.h allocate buffer and data in a single allocation 2015-03-01 21:16:09 +08:00
CHANGES more changes 2015-03-02 21:40:06 +08:00
channel.h Turn start_send_channel_request()'s type argument into char * 2015-05-05 20:39:13 +02:00
chansession.h Turn ChanSess's cmd attribute into char * 2015-05-05 20:39:14 +02:00
circbuffer.c Fix no-writev fallback 2015-05-02 22:47:25 +08:00
circbuffer.h Fix no-writev fallback 2015-05-02 22:47:25 +08:00
cli-agentfwd.c allocate buffer and data in a single allocation 2015-03-01 21:16:09 +08:00
cli-auth.c Turn banner, methods and tok local variable into char * 2015-05-05 20:39:14 +02:00
cli-authinteract.c Turn get_response()'s return type and prompt argument into char * 2015-05-05 20:39:14 +02:00
cli-authpasswd.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
cli-authpubkey.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
cli-channel.c
cli-chansession.c Turn start_send_channel_request()'s type argument into char * 2015-05-05 20:39:13 +02:00
cli-kex.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
cli-main.c Fix error handling for dbclient async connect 2015-03-03 20:53:00 +08:00
cli-runopts.c Disable non-delayed zlib for server 2015-01-28 21:38:27 +08:00
cli-session.c Turn cleantext()'s dirtytext argument into char * 2015-05-05 20:39:13 +02:00
cli-tcpfwd.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
common-algo.c Turn Algo_Type's name attribute into const char * 2015-05-05 20:39:14 +02:00
common-channel.c Turn send_msg_channel_open_failure()'s text and lang into const char * 2015-05-05 20:39:13 +02:00
common-chansession.c
common-kex.c Turn sshsession's remoteident attribute into char * 2015-05-05 20:39:14 +02:00
common-runopts.c - Don't use multichar constants since recent gcc complains 2014-07-27 22:55:29 +08:00
common-session.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
compat.c Fix compat basename() to handle paths with no slashes. Thanks to Frank Teo 2013-03-19 20:04:55 +08:00
compat.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
config.guess another new config.guess 2013-06-10 2013-11-14 22:07:18 +08:00
config.sub Update to 2013-10-01 2013-12-03 21:36:12 +08:00
configure.ac Test struct existance against sizeof() operator 2015-05-05 20:23:54 +02:00
crypto_desc.c Be safer with how we handle ltc_ecc_sets[] (particularly with 2013-04-09 22:44:19 +08:00
crypto_desc.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
curve25519-donna.c Fix for old compilers, variable declarations at beginning of functions 2015-02-24 20:51:18 +08:00
dbclient.1 Document ~/.ssh/id_dropbear 2015-01-28 22:22:32 +08:00
dbmulti.c Add URL to usage text 2013-03-21 23:10:47 +08:00
dbrandom.c Turn addrandom()'s buf argument into unsigned char * 2015-05-05 20:39:13 +02:00
dbrandom.h Turn addrandom()'s buf argument into unsigned char * 2015-05-05 20:39:13 +02:00
dbutil.c merge from default 2015-02-28 09:06:40 +08:00
dbutil.h merge from default 2015-02-28 09:06:40 +08:00
debug.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
dropbear.8 Add '-V' for version 2014-07-27 22:06:26 +08:00
dropbearconvert.1 Document ~/.ssh/id_dropbear 2015-01-28 22:22:32 +08:00
dropbearconvert.c rename random.h to dbrandom.h since some OSes have a system random.h 2013-11-14 22:05:47 +08:00
dropbearkey.1 Document ~/.ssh/id_dropbear 2015-01-28 22:22:32 +08:00
dropbearkey.c Default client key path ~/.ssh/id_dropbear 2015-01-24 00:05:26 +08:00
dss.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
dss.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
ecc.c Fix some memory leaks in ecc code 2015-03-01 22:44:36 +08:00
ecc.h Turn dropbear_ecc_curve's name into const char * 2015-05-05 20:39:14 +02:00
ecdsa.c Turn dropbear_ecc_curve's name into const char * 2015-05-05 20:39:14 +02:00
ecdsa.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
fake-rfc2553.c
fake-rfc2553.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
filelist.txt
gendss.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
gendss.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
genrsa.c generate RSA keys of exact length 2014-02-14 23:18:45 +08:00
genrsa.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
gensignkey.c Open directories O_RDONLY for fsync, add debugging if it fails 2015-01-04 22:22:43 +08:00
gensignkey.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
includes.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
INSTALL
install-sh
kex.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
keyimport.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
keyimport.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
LICENSE Fix no-writev fallback 2015-05-02 22:47:25 +08:00
list.c list.c also has no trailing newline 2011-07-05 12:52:06 +00:00
list.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
listener.c Free memory before exiting. Based on patch from Thorsten Horstmann. 2015-02-24 22:01:33 +08:00
listener.h Free memory before exiting. Based on patch from Thorsten Horstmann. 2015-02-24 22:01:33 +08:00
loginrec.c If running as non-root only allow that user to log in 2013-04-17 22:29:18 +08:00
loginrec.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
ltc_prng.c rename random.h to dbrandom.h since some OSes have a system random.h 2013-11-14 22:05:47 +08:00
ltc_prng.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
Makefile.in merge from default 2015-02-28 09:06:40 +08:00
MULTI - Fix "inst_scp" target since there isn't a manpage 2013-10-09 22:24:39 +08:00
netio.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
netio.h avoid malloc for iovec 2015-03-20 22:53:32 +08:00
options.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
packet.c Fix no-writev fallback 2015-05-02 22:47:25 +08:00
packet.h Make main socket nonblocking. Limit writequeue size. 2015-03-20 23:36:42 +08:00
process-packet.c Make -K keepalive behave like OpenSSH's ServerAliveInterval 2014-07-09 00:15:20 +08:00
progressmeter.c
progressmeter.h
queue.c Move the more verbose TRACE() statements into TRACE2() 2013-04-01 00:07:26 +08:00
queue.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
README README: fix ecdsa key generation command 2014-02-09 03:56:50 -05:00
release.sh sha256 2015-01-28 22:58:52 +08:00
rsa.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
rsa.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
runopts.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
scp.c Some minor typo fixes, found by codespell. 2015-02-24 20:45:07 +08:00
scpmisc.c Define _GNU_SOURCE for vasprintf 2013-03-24 00:02:20 +08:00
scpmisc.h
service.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
session.h Turn sshsession's remoteident attribute into char * 2015-05-05 20:39:14 +02:00
signkey.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
signkey.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
SMALL
ssh.h
sshpty.c ignore I_PUSH if it isn't defined, for Android from Reimar Döffinger 2013-03-19 20:12:19 +08:00
sshpty.h
svr-agentfwd.c Some minor typo fixes, found by codespell. 2015-02-24 20:45:07 +08:00
svr-auth.c Turn username, servicename and methodname local variables into char * 2015-05-05 20:39:13 +02:00
svr-authpam.c Get rid of spurious newlines in pam log messages 2013-10-03 23:04:26 +08:00
svr-authpasswd.c Constant time memcmp for the hmac and password crypt 2013-10-03 22:25:30 +08:00
svr-authpubkey.c Turn checkpubkey() and send_msg_userauth_pk_ok()'s algo argument into char * 2015-05-05 20:39:14 +02:00
svr-authpubkeyoptions.c Fix pointer differ in signess warnings [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
svr-chansession.c Turn signame local variable into char * 2015-05-05 20:39:14 +02:00
svr-kex.c Open directories O_RDONLY for fsync, add debugging if it fails 2015-01-04 22:22:43 +08:00
svr-main.c tcp fastopen for the server 2015-02-15 22:34:05 +08:00
svr-runopts.c Disable non-delayed zlib for server 2015-01-28 21:38:27 +08:00
svr-service.c Turn send_msg_service_accept()'s name argument into char * 2015-05-05 20:39:14 +02:00
svr-session.c Some additional cleanup functions 2015-02-24 22:17:04 +08:00
svr-tcpfwd.c Turn many local variables into char * 2015-05-05 20:39:14 +02:00
svr-x11fwd.c Expect len to be a type of socklen_t [-Werror=pointer-sign] 2015-05-05 20:39:13 +02:00
sysoptions.h merge from default 2015-02-28 09:06:40 +08:00
tcp-accept.c Turn addr local variable into char * 2015-05-05 20:39:14 +02:00
tcpfwd.h Turn TCPFwdEntry's connectaddr and listenaddr attributes into char * 2015-05-05 20:39:14 +02:00
termcodes.c add IUTF8 2013-04-02 19:11:13 +08:00
termcodes.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00
TODO
x11fwd.h DROPBEAR_ prefix for include guards to avoid collisions 2015-02-24 20:43:01 +08:00

This is Dropbear, a smallish SSH server and client.
https://matt.ucc.asn.au/dropbear/dropbear.html

INSTALL has compilation instructions.

MULTI has instructions on making a multi-purpose binary (ie a single binary
which performs multiple tasks, to save disk space)

SMALL has some tips on creating small binaries.

See TODO for a few of the things I know need looking at, and please contact
me if you have any questions/bugs found/features/ideas/comments etc :)

Matt Johnston
matt@ucc.asn.au


In the absence of detailed documentation, some notes follow:
============================================================================

Server public key auth:

You can use ~/.ssh/authorized_keys in the same way as with OpenSSH, just put
the key entries in that file. They should be of the form:

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAwVa6M6cGVmUcLl2cFzkxEoJd06Ub4bVDsYrWvXhvUV+ZAM9uGuewZBDoAqNKJxoIn0Hyd0Nk/yU99UVv6NWV/5YSHtnf35LKds56j7cuzoQpFIdjNwdxAN0PCET/MG8qyskG/2IE2DPNIaJ3Wy+Ws4IZEgdJgPlTYUBWWtCWOGc= someone@hostname

You must make sure that ~/.ssh, and the key file, are only writable by the
user. Beware of editors that split the key into multiple lines.

Dropbear supports some options for authorized_keys entries, see the manpage.

============================================================================

Client public key auth:

Dropbear can do public key auth as a client, but you will have to convert
OpenSSH style keys to Dropbear format, or use dropbearkey to create them.

If you have an OpenSSH-style private key ~/.ssh/id_rsa, you need to do:

dropbearconvert openssh dropbear ~/.ssh/id_rsa  ~/.ssh/id_rsa.db
dbclient -i ~/.ssh/id_rsa.db <hostname>

Dropbear does not support encrypted hostkeys though can connect to ssh-agent.

============================================================================

If you want to get the public-key portion of a Dropbear private key, look at
dropbearkey's '-y' option.

============================================================================

To run the server, you need to server keys, this is one-off:
./dropbearkey -t rsa -f dropbear_rsa_host_key
./dropbearkey -t dss -f dropbear_dss_host_key
./dropbearkey -t ecdsa -f dropbear_ecdsa_host_key

or alternatively convert OpenSSH keys to Dropbear:
./dropbearconvert openssh dropbear /etc/ssh/ssh_host_dsa_key dropbear_dss_host_key

You can also get Dropbear to create keys when the first connection is made -
this is preferable to generating keys when the system boots. Make sure 
/etc/dropbear/ exists and then pass '-R' to the dropbear server.

============================================================================

If the server is run as non-root, you most likely won't be able to allocate a
pty, and you cannot login as any user other than that running the daemon
(obviously). Shadow passwords will also be unusable as non-root.

============================================================================

The Dropbear distribution includes a standalone version of OpenSSH's scp
program. You can compile it with "make scp", you may want to change the path
of the ssh binary, specified by _PATH_SSH_PROGRAM in options.h . By default
the progress meter isn't compiled in to save space, you can enable it by 
adding 'SCPPROGRESS=1' to the make commandline.