Hi Matt,
Yes you are right, with strace i see missing files :
03 open("/usr/lib/libnss_compat.so.2", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No
such file or directory)
103 stat64("/usr/lib", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
103 open("/lib/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
103 open("/usr/lib/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No
such file or directory)
I build glibc-2.22 and install lib in my UDOO's rootfs
After that, dropbear is working nice :
118 open("/usr/lib/libnss_compat.so.2", O_RDONLY|O_CLOEXEC) = 7
118 read(7,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0x\r\0\0004\0\0\0T\257\1\0\2\4\0\0054\0"...,
512) = 512
118 fstat64(7, {st_mode=S_IFREG|0755, st_size=111940, ...}) = 0
118 mmap2(NULL, 86620, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 7, 0)
= 0x76d60000
118 mprotect(0x76d64000, 65536, PROT_NONE) = 0
118 mmap2(0x76d74000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 7, 0x4000) = 0x76d74000
118 close(7) = 0
Thanks a lot Matt
I just have one question about dropbear_dss_host_key & dropbear_rsa_host_key
I don't why we need to generate these keys ?
We normally only need public key from client in authorized_key file ?
Have a nice week
Laurent
Le mercredi 31 octobre 2018 à 14:35:44 UTC+1, Matt Johnston <[email protected]> a
écrit :
Hi Laurent,
My best guess is that it was built on lubuntu which uses glibc, but the Udoo
board doesn't have the required /lib/somewhere/libnss*.so libraries - those get
chosen at runtime based on /etc/nsswitch.conf. Building using a uclibc cross
compiler would avoid that - how did you build it? Also which distribution does
Udoo use?
If you can install strace on the Udoo board you can see what files are being
tried with
strace -f -F -o logfile -s 300 dropbear -vFE
Cheers,
Matt
> On Tue 30/10/2018, at 5:28 pm, Laurent Bourdel <[email protected]> wrote:
>
>
>
>
> with correct subject :
>
> Hi,I fail to login with ssh client to dropboxI use Udoo ARM board with
> busybox to install ssh serverI cross compiled dropbear under VirtualBox
> lubuntu and install binary to board ( /bin & /sbin)I generate RSA key
> (ssh-keygen -t rsa ) under lubuntu and copied content to
> /home/root/.ssh/authorized_keys on Udoo boardI run on Udoo board : dropbear
> -vFEOn VM lubuntu : ssh -vvv [email protected] add trace on dropbear sources
> and found problem come with function getpwnam to read /etc/password with
> errno=0;pw = getpwnam(username);dropbear_log(LOG_WARNING,"LBR %s %d
> %s",__FILE__ ,__LINE__, strerror(errno));if (!pw) {return;}[157] Jan 01
> 01:06:50 LBR common-session.c 595 No such file or directory
