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Dropbear All-in-One

License: Other

C 91.04% Shell 0.46% TeX 5.74% HTML 0.01% Perl 0.52% Makefile 1.06% M4 0.38% Roff 0.26% Python 0.38% Java 0.15% Raku 0.01%

dropbear's Introduction

Dropbear All-in-One

Dropbear is a relatively small SSH server and client. It runs on a variety of POSIX-based platforms. Dropbear is open source software, distributed under a MIT-style license. Dropbear is particularly useful for "embedded"-type Linux (or other Unix) systems, such as wireless routers.

Differences between this version and the official version

The scp utility is integrated into the main module dropbearmulti. An example of running integrated scp utility: ./dropbearmulti scp -pf '/tmp/file.txt'
No external libraries required.

Build toolchain

Download musl version of toolchain: linux musl toolchain

Build

git clone https://github.com/openwrt-xiaomi/dropbear.git

cd dropbear

#sed -i 's/.*define DEFAULT_PATH.*/#define DEFAULT_PATH "\/usr\/bin:\/bin:\/usr\/sbin:\/sbin"/' default_options.h

TARGET_HOST=mipsel-buildroot-linux-musl
CROSS_TOOL=/home/<toolchain_dir>/bin/mipsel-buildroot-linux-musl

#TARGET_HOST=arm-buildroot-linux-musleabihf
#CROSS_TOOL=/home/<toolchain_dir>/bin/arm-buildroot-linux-musleabihf

#TARGET_HOST=aarch64-buildroot-linux-musl
#CROSS_TOOL=/home/<toolchain_dir>/bin/aarch64-buildroot-linux-musl

./configure --host=$TARGET_HOST --enable-static --disable-zlib --disable-harden \
  --disable-pam --enable-bundled-libtom --enable-openpty --enable-syslog \
  --disable-lastlog --disable-utmpx --disable-utmp --disable-wtmp --disable-wtmpx \
  --disable-loginfunc --disable-pututline --disable-pututxline \
  CC="$CROSS_TOOL-gcc" \
  CFLAGS="-Os -Wl,-static -ffunction-sections -fdata-sections" \
  LDFLAGS="-static -Wl,--gc-sections -Wl,--strip-all"

make PROGRAMS="dropbear scp dropbearkey" MULTI=1 STATIC=1

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