mirror of https://github.com/dirtbags/moth.git
move mcp to new points architecture
This commit is contained in:
Neale Pickett
parent
34d4dae4a4
commit
d95aecd25d
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@ -1,7 +1,5 @@
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#! /bin/sh -e
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PATH=/bin:/opt/ctfbase/bin
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if [ $# -ne 1 ]; then
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echo "Usage: $0 TEAM" 1>&2
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exit 64
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@ -20,8 +18,8 @@ www=${CTF_BASE:-/var/www}
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mkdir -p $base/teams/names
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mkdir -p $base/teams/colors
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[ -f $base/teams/nonce ] || dd if=/dev/urandom count=1 | md5sum | cut -b 1-8 > $base/teams/nonce
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nonce=$(cat $base/teams/nonce)
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[ -f $base/teams/salt ] || dd if=/dev/urandom count=1 2>/dev/null | md5sum | cut -b 1-8 > $base/teams/salt
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salt=$(cat $base/teams/salt)
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# Assign a color. I spent weeks selecting a color pallette that
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# wouldn't be hell on people with protanopia. Please don't change these
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@ -48,7 +46,7 @@ esac
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# Compute hash of team name; they'll use this for everything in the
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# contest instead of their team name, which makes stuff much easier on
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# me since all team hashes are in the set /[0-9a-f]{8}/.
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hash=$(printf "%s:%s" $nonce "$1" | md5sum | cut -b 1-8)
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hash=$(printf "%s:%s" $salt "$1" | md5sum | cut -b 1-8)
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echo "$1" > $base/teams/names/$hash
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echo "$color" > $base/teams/colors/$hash
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@ -17,14 +17,6 @@ install -d /var/lib/ctf
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install -o ctf -m 0755 -d $NEWDIR
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install -o ctf -m 0755 -d /var/lib/ctf/points.tmp
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# Make tokens database now, this is as good a time as any
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TOKENS=/var/lib/ctf/tokens.db
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for fn in $TOKENS /opt/*/tokens.txt; do
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[ -f "$fn" ] || continue
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cat $fn
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done | sort | uniq > $TOKENS.new
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mv $TOKENS.new $TOKENS
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# Create some files
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CLAIM=/var/lib/ctf/claim.db
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touch $CLAIM
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@ -29,9 +29,6 @@ main(int argc, char *argv[])
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}
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}
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if (! team_exists(team)) {
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cgi_result(409, "No such team", "<p>There is no team with that hash.</p>");
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}
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/* Any weird characters in token name? */
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{
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@ -49,12 +46,6 @@ main(int argc, char *argv[])
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}
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}
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/* Does the token exist? */
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if (! fgrepx(token, state_path("tokens.db"))) {
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cgi_result(409, "No such token", "<p>This token has not been issued.</p>");
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}
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/* Award points */
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{
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char *p = token;
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@ -62,6 +53,7 @@ main(int argc, char *argv[])
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char category[40];
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char points_s[40];
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int points;
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int ret;
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/* Pull category name out of the token */
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for (q = category; *p && (*p != ':'); p += 1) {
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@ -70,6 +62,11 @@ main(int argc, char *argv[])
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*q = '\0';
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if (p) p += 1;
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/* Now we can check to see if it's valid */
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if (! anchored_search(package_path("%s/tokens.txt", category), token, 0)) {
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cgi_result(409, "No such token", "<p>This token has not been issued.</p>");
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}
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/* Pull point value out of the token (if it has one) */
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for (q = points_s; *p && (*p != ':'); p += 1) {
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*(q++) = *p;
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@ -78,11 +75,9 @@ main(int argc, char *argv[])
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points = atoi(points_s);
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if (0 == points) points = 1;
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{
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char line[200];
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my_snprintf(line, sizeof(line), "%s %s", team, token);
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award_and_log_uniquely(team, category, points, state_path("claim.db"), line);
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ret = award_points(team, category, points, token);
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if (ret < 0) {
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cgi_fail(ret);
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}
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}
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@ -228,6 +228,21 @@ cgi_result(int code, char *desc, char *fmt, ...)
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exit(0);
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}
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void
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cgi_fail(int err)
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{
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switch (err) {
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case ERR_GENERAL:
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cgi_result(500, "Points not awarded", "<p>The server is unable to award your points at this time.</p>");
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case ERR_NOTEAM:
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cgi_result(409, "No such team", "<p>There is no team with that hash.</p>");
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case ERR_CLAIMED:
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cgi_result(409, "Already claimed", "<p>Your team has already claimed these points.</p>");
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default:
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cgi_result(409, "Failure", "<p>Failure code: %d</p>", err);
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}
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}
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void
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cgi_page(char *title, char *fmt, ...)
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{
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@ -252,44 +267,55 @@ cgi_error(char *text)
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* Common routines
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*/
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#define EOL(c) ((EOF == (c)) || ('\n' == (c)))
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/* cut -d$ANCHOR -f2- | grep -Fx "$NEEDLE" */
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int
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fgrepx(char const *needle, char const *filename)
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anchored_search(char const *filename, char const *needle, char const anchor)
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{
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FILE *f;
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int found = 0;
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char const *p = needle;
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FILE *f = fopen(filename, "r");
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size_t nlen = strlen(needle);
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char line[1024];
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int ret = 0;
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f = fopen(filename, "r");
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if (f) {
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while (1) {
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int c = fgetc(f);
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while (f) {
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char *p;
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/* This list of cases would have looked so much nicer in OCaml. I
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apologize. */
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if (EOL(c) && ('\0' == *p)) {
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found = 1;
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break;
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} else if (EOF == c) { /* End of file */
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break;
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} else if (('\0' == p) || (*p != (char)c)) {
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p = needle;
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/* Discard the rest of the line */
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do {
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c = fgetc(f);
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} while (! EOL(c));
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} else if (EOL(c)) {
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p = needle;
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} else { /* It matched */
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p += 1;
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}
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if (NULL == fgets(line, sizeof line, f)) {
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break;
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}
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/* Find anchor */
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if (anchor) {
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p = strchr(line, anchor);
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if (! p) {
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continue;
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}
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p += 1;
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} else {
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p = line;
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}
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/* Don't bother with strcmp if string lengths differ.
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If this string is shorter than the previous, it's okay. This is
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just a performance hack.
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*/
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if ((p[nlen] != '\n') &&
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(p[nlen] != '\0')) {
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continue;
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}
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p[nlen] = 0;
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/* Okay, now we can compare! */
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if (0 == strcmp(p, needle)) {
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ret = 1;
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break;
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}
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}
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fclose(f);
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}
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return found;
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if (f) {
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fclose(f);
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}
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return ret;
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}
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void
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@ -343,9 +369,8 @@ mkpath(char const *base, char const *fmt, va_list ap)
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char relpath[PATH_MAX];
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static char path[PATH_MAX];
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char const *var;
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int len;
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len = vsnprintf(relpath, sizeof(relpath) - 1, fmt, ap);
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vsnprintf(relpath, sizeof(relpath) - 1, fmt, ap);
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relpath[sizeof(relpath) - 1] = '\0';
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var = getenv("CTF_BASE");
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@ -409,26 +434,36 @@ team_exists(char const *teamhash)
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return 1;
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}
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/* Return values:
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-1: general error
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-2: no such team
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-3: points already awarded
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*/
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int
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award_points(char const *teamhash,
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char const *category,
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long points)
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const long points,
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char const *uid)
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{
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char line[100];
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int linelen;
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char *filename;
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int fd;
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FILE *f;
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time_t now = time(NULL);
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if (! team_exists(teamhash)) {
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return -2;
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return ERR_NOTEAM;
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}
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linelen = snprintf(line, sizeof(line),
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"%lu %s %s %ld\n",
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(unsigned long)now, teamhash, category, points);
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"%s %s %ld %s",
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teamhash, category, points, uid);
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if (sizeof(line) <= linelen) {
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return -1;
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return ERR_GENERAL;
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}
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if (anchored_search(state_path("points.log"), line, ' ')) {
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return ERR_CLAIMED;
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}
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/* At one time I had this writing to a single log file, using lockf.
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@ -443,43 +478,30 @@ award_points(char const *teamhash,
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those files to the main log file, it is possible to stop the thing
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that appends, edit the file at leisure, and then start the appender
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back up, all without affecting things trying to score: they're
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still able to record their score and move on. You don't even
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really need an appender, but it does make things look a little
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nicer on the fs.
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The fact that this makes the code simpler is just gravy.
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Note that doing this means there's a little time between when a
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score's written and when the scoreboard (which only reads the log
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file) picks it up. It's not a big deal for the points log, but
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this situation makes this technique unsuitable for writing log
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files that prevent people from double-scoring, like the puzzler or
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token log.
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still able to record their score and move on.
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*/
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filename = state_path("points.tmp/%d.%d.%s.%s.%ld",
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now, getpid(),
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filename = state_path("points.tmp/%lu.%d.%s.%s.%ld",
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(unsigned long)now, getpid(),
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teamhash, category, points);
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fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
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if (-1 == fd) {
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return -1;
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f = fopen(filename, "w");
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if (! f) {
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return ERR_GENERAL;
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}
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if (-1 == write(fd, line, linelen)) {
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close(fd);
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return -1;
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if (EOF == fprintf(f, "%lu %s\n", (unsigned long)now, line)) {
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return ERR_GENERAL;
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}
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close(fd);
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fclose(f);
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/* Rename into points.new */
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{
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char ofn[PATH_MAX];
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strncpy(ofn, filename, sizeof(ofn));
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filename = state_path("points.new/%d.%d.%s.%s.%ld",
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now, getpid(),
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filename = state_path("points.new/%lu.%d.%s.%s.%ld",
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(unsigned long)now, getpid(),
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teamhash, category, points);
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rename(ofn, filename);
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}
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@ -487,49 +509,3 @@ award_points(char const *teamhash,
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return 0;
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}
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/** Award points iff they haven't been logged.
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If [line] is not in [dbfile], append it and give [points] to [team]
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in [category].
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*/
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void
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award_and_log_uniquely(char const *team,
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char const *category,
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long points,
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char const *dbpath,
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char const *line)
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{
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int fd;
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/* Make sure they haven't already claimed these points */
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if (fgrepx(line, dbpath)) {
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cgi_result(409, "Already claimed",
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"<p>Your team has already claimed these points.</p>");
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}
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/* Open and lock logfile */
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fd = open(dbpath, O_WRONLY | O_CREAT, 0666);
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if (-1 == fd) {
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cgi_error("Unable to open log");
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}
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if (-1 == lockf(fd, F_LOCK, 0)) {
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cgi_error("Unable to lock log");
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}
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/* Award points */
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if (0 != award_points(team, category, points)) {
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cgi_error("Unable to award points");
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}
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/* Log that we did so */
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lseek(fd, 0, SEEK_END);
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if (-1 == write(fd, line, strlen(line))) {
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cgi_error("Unable to append log");
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}
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if (-1 == write(fd, "\n", 1)) {
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cgi_error("Unable to append log");
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}
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close(fd);
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}
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@ -9,28 +9,29 @@
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#define TOKEN_MAX 80
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#define itokenlen 5
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#define ERR_GENERAL -1
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#define ERR_NOTEAM -2
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#define ERR_CLAIMED -3
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int cgi_init(char *global_argv[]);
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size_t cgi_item(char *str, size_t maxlen);
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void cgi_head(char *title);
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void cgi_foot();
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void cgi_result(int code, char *desc, char *fmt, ...);
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void cgi_fail(int err);
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void cgi_page(char *title, char *fmt, ...);
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void cgi_error(char *text);
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int fgrepx(char const *needle, char const *filename);
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int anchored_search(char const *filename, char const *needle, const char anchor);
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void urandom(char *buf, size_t buflen);
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int my_snprintf(char *buf, size_t buflen, char *fmt, ...);
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char *state_path(char const *fmt, ...);
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char *package_path(char const *fmt, ...);
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int team_exists(char const *teamhash);
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int award_points(char const *teamhacsh,
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int award_points(char const *teamhash,
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char const *category,
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long point);
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void award_and_log_uniquely(char const *team,
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char const *category,
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long points,
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char const *logfile,
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char const *line);
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long point,
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char const *uid);
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#endif
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@ -1,6 +1,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <sysexits.h>
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#include <time.h>
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#include "common.h"
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int
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@ -8,9 +9,10 @@ main(int argc, char *argv[])
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{
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int points;
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int ret;
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char comment[512];
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if (argc != 4) {
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fprintf(stderr, "Usage: pointscli TEAM CATEGORY POINTS\n");
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if (argc != 5) {
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fprintf(stderr, "Usage: pointscli TEAM CATEGORY POINTS 'COMMENT'\n");
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return EX_USAGE;
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}
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@ -20,17 +22,22 @@ main(int argc, char *argv[])
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return EX_USAGE;
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}
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ret = award_points(argv[1], argv[2], points);
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snprintf(comment, sizeof comment, "--%s", argv[4]);
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ret = award_points(argv[1], argv[2], points, comment);
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switch (ret) {
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case -3:
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fprintf(stderr, "Runtime error\n");
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return EX_SOFTWARE;
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case -2:
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case ERR_GENERAL:
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perror("General error");
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return EX_UNAVAILABLE;
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case ERR_NOTEAM:
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fprintf(stderr, "No such team\n");
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return EX_NOUSER;
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case -1:
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perror("Couldn't award points");
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return EX_UNAVAILABLE;
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case ERR_CLAIMED:
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fprintf(stderr, "Duplicate entry\n");
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return EX_DATAERR;
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default:
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fprintf(stderr, "Error %d\n", ret);
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return EX_SOFTWARE;
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}
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return 0;
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|
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|
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@ -40,11 +40,6 @@ main(int argc, char *argv[])
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}
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}
|
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/* Check to see if team exists */
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if (! team_exists(team)) {
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cgi_page("No such team", "");
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}
|
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/* Validate category name (prevent directory traversal) */
|
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{
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char *p;
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@ -62,19 +57,16 @@ main(int argc, char *argv[])
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my_snprintf(needle, sizeof(needle), "%ld %s", points, answer);
|
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|
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if (! fgrepx(needle,
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package_path("%s/answers.txt", category))) {
|
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if (! anchored_search(package_path("%s/answers.txt", category), needle, 0)) {
|
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cgi_page("Wrong answer", "");
|
||||
}
|
||||
}
|
||||
|
||||
{
|
||||
char line[200];
|
||||
|
||||
my_snprintf(line, sizeof(line),
|
||||
"%s %s %ld", team, category, points);
|
||||
award_and_log_uniquely(team, category, points,
|
||||
state_path("puzzles.db"), line);
|
||||
int ret = award_points(team, category, points, "P");
|
||||
if (ret < 0) {
|
||||
cgi_fail(ret);
|
||||
}
|
||||
}
|
||||
|
||||
cgi_page("Points awarded",
|
||||
|
|
|
|||
Loading…
Reference in New Issue