Merge pull request #1 from aa9863/BuildTest

Build test

BaseImages/Builder/Dockerfile

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+FROM debian:stable
+
+RUN apt update && apt install -y gcc gcc-multilib

BaseImages/Server/Dockerfile

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+FROM 6048_builder as ServerBuilder
+
+ADD ./server.c /opt/server.c
+
+WORKDIR /opt
+RUN gcc /opt/server.c -o /opt/server
+
+
+FROM debian:stable
+
+#Get SSH
+#Install SSH Server
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y \
+    openssh-server libc6-i386
+
+#Configure SSH (Cant run as Daemon if this doenst exit)
+RUN mkdir /var/run/sshd
+
+ADD ./runscript.sh /tmp/runscript.sh
+
+# --- System Configuration --------
+#Add a User
+RUN useradd -ms /bin/bash cueh && echo cueh:cueh | chpasswd
+
+COPY --from=ServerBuilder /opt/server /opt/server
+
+CMD ["/usr/sbin/sshd", "-D"]

BaseImages/Server/runscript.sh

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+#!/bin/bash
+
+# turn on bash's job control
+set -m
+
+
+
+echo "Starting SSH"
+/usr/sbin/sshd -D &
+
+echo "Running server with $1"
+/opt/server $1
+
+wait -n
+exit $?

BaseImages/Server/server.c

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+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+
+//https://stackoverflow.com/questions/5194666/disable-randomization-of-memory-addresses/30385370#30385370
+#include <sys/personality.h>
+#include <signal.h>
+
+int processConnection(int fd, int argc, char* argv[]) {
+    close(0);
+    close(1);
+    close(2);
+    dup2(fd, 0);
+    dup2(fd, 1);
+    dup2(fd, 2);
+
+    if(getenv("RUN_ALSR")) {
+      printf("Running with ALSR turned off\n");
+      fflush(stdout);
+      int out = personality(ADDR_NO_RANDOMIZE);
+      printf("Result %d\n", out);
+      fflush(stdout);
+    }
+
+    execvp(argv[1], &argv[1]);
+}
+
+int main(int argc, char* argv[]) {
+    if (argc < 2) {
+        printf("Please provide the application to run on connection");
+        exit(-1);
+    }
+
+    struct sockaddr_in address;
+    address.sin_family = AF_INET;
+    address.sin_port = htons(1337);
+    address.sin_addr.s_addr = INADDR_ANY;
+
+    int sock = socket(AF_INET, SOCK_STREAM, 0);
+    int status = bind(sock, (struct sockaddr *) &address, sizeof(address));
+
+    if (status == -1) {
+        printf("Failed to bind socket, error is: %s\n", strerror(errno));
+        exit(-2);
+    }
+
+    listen(sock, 0);
+
+
+    printf("Server started, listening on 0.0.0.0:1337, connect using the client app!\n");
+
+    while (1) {
+        int resultfd = accept(sock, NULL, NULL);
+        int pid = fork();
+        if (pid == 0)
+            return processConnection(resultfd, argc, argv);
+        else {
+	  signal(SIGCHLD, SIG_IGN); //Dont give fuck about Zombie Children.
+            printf("Received connection as FD %d\n", resultfd);
+            close(resultfd);
+        }
+    }
+
+    return 0;
+}

BaseImages/docker-compose.yaml

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+version: "3.7"
+
+services:
+  builder:
+    image: 6048_builder
+    build:
+      context: Builder
+
+  server:
+    image: 6048_server
+    build:
+      context: Server