Start at p2 server package

This commit is contained in:
Neale Pickett 2012-06-09 16:11:23 -06:00
parent 794356972d
commit 16c9dc94e5
12 changed files with 120 additions and 236 deletions

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@ -1,13 +1,20 @@
00ADMIN_PKGDIR = $(TARGET)/00admin
00ADMIN_BUILDDIR = $(BUILD)/00admin
ifndef PASSWORD
$(error PASSWORD not defined)
endif
00admin-install:
00admin-build: $(00ADMIN_BUILDDIR)/build
$(00ADMIN_BUILDDIR)/build:
$(MAKE) -C packages/00admin/src
touch $<
00admin-install: $(00ADMIN_BUILDDIR)/build
$(call COPYTREE, packages/00admin/service, $(00ADMIN_PKGDIR)/service)
echo "$(PASSWORD)" > $(00ADMIN_PKGDIR)/password
mkdir -p $(00ADMIN_PKGDIR)/sbin
cp packages/00admin/sbin/* $(00ADMIN_PKGDIR)/sbin
cp packages/00admin/bin/* $(00ADMIN_PKGDIR)/bin
cp packages/00admin/src/tea $(00ADMIN_PKGDIR)/bin
PACKAGES += 00admin

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all: tea
clean:
rm -f tea

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@ -1,14 +1,11 @@
CFLAGS = -Wall -Werror
TARGETS = claim.cgi puzzler.cgi puzzles.cgi
TARGETS += pointscli arc4 tea
TARGETS += pointscli
all: build
build: $(TARGETS)
arc4: CFLAGS += -DARC4_MAIN
arc4: arc4.o
pointscli: pointscli.o common.o
puzzles.cgi: puzzles.cgi.o common.o

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@ -1,230 +0,0 @@
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "arc4.h"
#define swap(a, b) do {uint8_t _swap=a; a=b, b=_swap;} while (0)
void
arc4_init(struct arc4_ctx *ctx, uint8_t const *key, size_t keylen)
{
int i;
int j = 0;
for (i = 0; i < 256; i += 1) {
ctx->S[i] = i;
}
for (i = 0; i < 256; i += 1) {
j = (j + ctx->S[i] + key[i % keylen]) % 256;
swap(ctx->S[i], ctx->S[j]);
}
ctx->i = 0;
ctx->j = 0;
}
uint8_t
arc4_out(struct arc4_ctx *ctx)
{
ctx->i = (ctx->i + 1) % 256;
ctx->j = (ctx->j + ctx->S[ctx->i]) % 256;
swap(ctx->S[ctx->i], ctx->S[ctx->j]);
return ctx->S[(ctx->S[ctx->i] + ctx->S[ctx->j]) % 256];
}
void
arc4_crypt(struct arc4_ctx *ctx,
uint8_t *obuf, const uint8_t *ibuf, size_t buflen)
{
size_t k;
for (k = 0; k < buflen; k += 1) {
obuf[k] = ibuf[k] ^ arc4_out(ctx);
}
}
/* Create a nonce as an arc4 stream with key=seed */
void
arc4_nonce(uint8_t *nonce, size_t noncelen,
void *seed, size_t seedlen)
{
struct arc4_ctx ctx;
int i;
arc4_init(&ctx, seed, seedlen);
for (i = 0; i < noncelen; i += 1) {
nonce[i] = arc4_out(&ctx);
}
}
/***************************************************
*
* Psuedo Random Number Generation
*
*/
static struct arc4_ctx prng_ctx;
static int prng_initialized = 0;
void
arc4_rand_seed(const uint8_t *seed, size_t seedlen)
{
arc4_init(&prng_ctx, seed, seedlen);
prng_initialized = 1;
}
static void
arc4_rand_autoseed()
{
if (! prng_initialized) {
uint8_t key[ARC4_KEYLEN];
FILE *urandom;
/* Open /dev/urandom or die trying */
urandom = fopen("/dev/urandom", "r");
if (! urandom) {
perror("Opening /dev/urandom");
abort();
}
setbuf(urandom, NULL);
fread(&key, sizeof(key), 1, urandom);
fclose(urandom);
arc4_rand_seed(key, sizeof(key));
}
}
uint8_t
arc4_rand8()
{
arc4_rand_autoseed();
return arc4_out(&prng_ctx);
}
uint32_t
arc4_rand32()
{
arc4_rand_autoseed();
return ((arc4_out(&prng_ctx) << 0) |
(arc4_out(&prng_ctx) << 8) |
(arc4_out(&prng_ctx) << 16) |
(arc4_out(&prng_ctx) << 24));
}
/*****************************************
*
* Stream operations
*
*/
ssize_t
arc4_encrypt_stream(FILE *out, FILE *in,
const uint8_t *key, size_t keylen)
{
struct arc4_ctx ctx;
uint32_t seed = arc4_rand32();
uint8_t nonce[ARC4_KEYLEN];
ssize_t written = 0;
int i;
fwrite("arc4", 4, 1, out);
fwrite(&seed, sizeof(seed), 1, out);
arc4_nonce(nonce, sizeof(nonce), &seed, sizeof(seed));
for (i = 0; i < keylen; i += 1) {
nonce[i] ^= key[i];
}
arc4_init(&ctx, nonce, sizeof(nonce));
while (1) {
int c = fgetc(in);
if (EOF == c) break;
fputc((uint8_t)c ^ arc4_out(&ctx), out);
written += 1;
}
return written;
}
ssize_t
arc4_decrypt_stream(FILE *out, FILE *in,
const uint8_t *key, size_t keylen)
{
struct arc4_ctx ctx;
uint32_t seed;
uint8_t nonce[ARC4_KEYLEN];
ssize_t written = 0;
char sig[4];
int i;
fread(&sig, sizeof(sig), 1, in);
if (memcmp(sig, "arc4", 4)) {
return -1;
}
fread(&seed, sizeof(seed), 1, in);
arc4_nonce(nonce, sizeof(nonce), &seed, sizeof(seed));
for (i = 0; i < keylen; i += 1) {
nonce[i] ^= key[i];
}
arc4_init(&ctx, nonce, sizeof(nonce));
while (1) {
int c = fgetc(in);
if (EOF == c) break;
fputc((uint8_t)c ^ arc4_out(&ctx), out);
written += 1;
}
return written;
}
#ifdef ARC4_MAIN
#include <sysexits.h>
#include <unistd.h>
int
main(int argc, char *argv[])
{
uint8_t key[ARC4_KEYLEN] = {0};
size_t keylen;
/* Read key and initialize context */
{
char *ekey = getenv("KEY");
if (ekey) {
keylen = strlen(ekey);
memcpy(key, ekey, keylen);
} else {
keylen = read(3, key, sizeof(key));
if (-1 == keylen) {
fprintf(stderr, "error: must specify key.\n");
return 1;
}
}
}
if (! argv[1]) {
if (-1 == arc4_decrypt_stream(stdout, stdin, key, keylen)) {
fprintf(stderr, "error: not an arc4 stream.\n");
return 1;
}
} else if (0 == strcmp(argv[1], "-e")) {
arc4_encrypt_stream(stdout, stdin, key, keylen);
} else {
fprintf(stderr, "Usage: %s [-e] <PLAINTEXT\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "You must pass in a key on fd 3 or in the environment variable KEY.\n");
return EX_USAGE;
}
return 0;
}
#endif /* ARC4_MAIN */

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#! /bin/sh
/opt/00admin/bin/fire-ip del

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10.0.0.2/24

25
packages/p2/service/httpd/run Executable file
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#! /bin/sh -e
exec 2>&1
IP=$(/opt/00admin/bin/fire-ip add)
addgroup -g 65534 nogroup || true
adduser -D -g nogroup -u 65534 -h /tmp -H nobody || true
hostname p2
# Link in puzzles and web pages
install -d /var/www
for d in /opt/*; do
w=/var/www/$(basename $d)
if [ -d $d/puzzles ] && ! [ -d $w ]; then
ln -sf $d/puzzles $w
fi
if [ -d $d/www ]; then
ln -sf $d/www/* /var/www/
fi
done
ln -sf /var/www default
exec tcpsvd -u nobody ${IP%/*} 80 /opt/p2/bin/eris -c

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#! /bin/sh
exec svlogd -tt $PWD

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#! /bin/sh -e
fn=$2/$3
WWW=${CTF_BASE:-/var/www}
BASE=${CTF_BASE:-/var/lib/ctf}
OPT=${CTF_BASE:-/opt}
POINTS=$BASE/points.log
BACKUP=$WWW/backup.png
SCOREBOARD=$WWW/scoreboard.html
# Only do this if this score hasn't yet been recorded
if [ -z "$(sort -k2 $POINTS $fn | uniq -f1 -d)" ]; then
cat $fn >> $POINTS
rm $fn
fi
if [ $POINTS -nt $SCOREBOARD ]; then
# Generate new backup
(
cat bkup.png;
tar cvf - $BASE | gzip -c | $OPT/00admin/bin/tea 3< $OPT/00admin/password
) > $BACKUP.new
mv $BACKUP.new $BACKUP
# Render scoreboard
/opt/p2/bin/scoreboard < $POINTS > $SCOREBOARD.new
mv $SCOREBOARD.new $SCOREBOARD
fi

44
packages/p2/service/pointsd/run Executable file
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#! /bin/sh -e
exec 2>&1
install -d /var/lib/ctf
# Create CTF and nobody users
touch /etc/group /etc/passwd
addgroup -g 65534 nogroup || true
adduser -D -S -h /var/lib/ctf -H ctf || true
adduser -D -g nogroup -u 65534 -h /tmp -H nobody || true
# Set up base directories
NEWDIR=/var/lib/ctf/points.new
install -d /var/www
install -d /var/lib/ctf
install -o ctf -m 0755 -d $NEWDIR
install -o ctf -m 0755 -d /var/lib/ctf/points.tmp
# Create some files
CLAIM=/var/lib/ctf/claim.db
touch $CLAIM
chown ctf $CLAIM
touch /var/lib/ctf/points.log
# Generate preliminary scoreboard
if ! [ -f /var/www/scoreboard.html ]; then
/opt/mcp/bin/scoreboard < /dev/null > /var/www/scoreboard.html
fi
if [ -x /sbin/inotifyd ]; then
exec /sbin/inotifyd ./pointsd $NEWDIR:y
fi
# Simulate inotifyd
cd $NEWDIR
while true; do
for fn in *; do
[ -f "$fn" ] || continue
./pointsd m $NEWDIR $fn
done
sleep 7
done

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