code wiki / _hdl_build / nx_cms_snapshot_gate.nx
`nx_cms_snapshot_gate.nx` source

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1// nx_cms_snapshot_gate.nx -- CMS W4 GATE (re-runnable, evidence-driven): SNAPSHOT/RESTORE (the
2// UpdraftPlus class). Proves at the wire: take a snapshot of the published baseline, change the live
3// content, then RESTORE -> the live page returns to the BYTE-EXACT baseline (not the change); the
4// snapshot is downloadable + carries the archive magic; restore is session+CSRF guarded. Appends
5// "CMSGATE row=nx_cms_snapshot ... verdict=PASS|FAIL". Exit 0 iff all rows pass. license_tier: ORIGINAL
6import "nx_cms_store.nx"
7import "nx_connect.nx"   // bounded connect: a raw sys_connect hangs ~127s on a black-holed host
8import "nx_sha256.nx"
9import "nx_syscalls.nx"
10import "_hdl_build/nx_kill_portable.nx"
11
12const KS_PORT: i64 = 8091
13const KS_SITE: *u8 = "/tmp/_cms_snap_site"
14
15func ks_w(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 }
16func ks_len(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} return n }
17func ks_cat(dst: *u8, off: i64, s: *u8) -> i64 { var o: i64=off; var k: i64=0; while s[k]!=(0 as u8){dst[o]=s[k];o=o+1;k=k+1} return o }
18func ks_catn(dst: *u8, off: i64, s: *u8, n: i64) -> i64 { var o: i64=off; var k: i64=0; while k<n{dst[o]=s[k];o=o+1;k=k+1} return o }
19func ks_index(hay: *u8, n: i64, needle: *u8) -> i64 {
  let nl: i64 = ks_len(needle)
  var i: i64 = 0
  while i + nl <= n {
      var q: i64 = 0
      var ok: i64 = 1
      while q < nl { if (hay[i+q] as i64) != (needle[q] as i64) { ok = 0; q = nl } q = q + 1 }
      if ok == 1 { return i }
      i = i + 1
  }
  return 0 - 1
30}
31func ks_has(hay: *u8, n: i64, needle: *u8) -> i64 { if ks_index(hay, n, needle) >= 0 { return 1 } return 0 }
32func ks_http(req: *u8, rl: i64, resp: *u8, cap: i64) -> i64 {
  let fd: i64 = sys_socket(2, 1, 0)
  if fd < 0 { return 0 - 1 }
  let addr: *u8 = sys_mmap(16)
  addr[0] = 2 as u8; addr[1] = 0 as u8
  addr[2] = ((KS_PORT >> 8) & 0xff) as u8
  addr[3] = (KS_PORT & 0xff) as u8
  addr[4] = 127 as u8; addr[5] = 0 as u8; addr[6] = 0 as u8; addr[7] = 1 as u8
  var zi: i64 = 8
  while zi < 16 { addr[zi] = 0 as u8; zi = zi + 1 }
  if nx_connect_bounded(fd, addr, 16, NX_CONN_DEFAULT_MS) < 0 { sys_close(fd); return 0 - 1 }
  var off: i64 = 0
  var go: i64 = 1
  while go == 1 { go = 0; if off < rl { let w: i64 = sys_write(fd, (req + off) as *u8, rl - off); if w > 0 { off = off + w; go = 1 } } }
  sys_set_socket_timeout(fd, 10)
  var total: i64 = 0
  go = 1
  while go == 1 { go = 0; if total < cap { let r: i64 = sys_read(fd, (resp + total) as *u8, cap - total); if r > 0 { total = total + r; go = 1 } } }
  sys_close(fd)
  return total
52}
53func ks_post(req: *u8, path: *u8, cookie: *u8, body: *u8) -> i64 {
  var o: i64 = ks_cat(req, 0, "POST " as *u8)
  o = ks_cat(req, o, path)
  o = ks_cat(req, o, " HTTP/1.1\r\nHost: gate\r\nContent-Type: application/x-www-form-urlencoded\r\n" as *u8)
  if (cookie[0] as i64) != 0 { o = ks_cat(req, o, "Cookie: nsess=" as *u8); o = ks_catn(req, o, cookie, 32); o = ks_cat(req, o, "\r\n" as *u8) }
  o = ks_cat(req, o, "Content-Length: " as *u8)
  let bl: i64 = ks_len(body)
  let t: *u8 = sys_mmap(24)
  var m: i64 = bl
  var k: i64 = 0
  if m == 0 { t[0] = 48 as u8; k = 1 }
  while m > 0 { t[k] = (48 + (m % 10)) as u8; m = m / 10; k = k + 1 }
  var i: i64 = 0
  while i < k { req[o] = t[k-1-i]; o = o + 1; i = i + 1 }
  o = ks_cat(req, o, "\r\n\r\n" as *u8)
  o = ks_cat(req, o, body)
  return o
70}
71func ks_get(req: *u8, path: *u8, cookie: *u8) -> i64 {
  var o: i64 = ks_cat(req, 0, "GET " as *u8)
  o = ks_cat(req, o, path)
  o = ks_cat(req, o, " HTTP/1.1\r\nHost: gate\r\n" as *u8)
  if (cookie[0] as i64) != 0 { o = ks_cat(req, o, "Cookie: nsess=" as *u8); o = ks_catn(req, o, cookie, 32); o = ks_cat(req, o, "\r\n" as *u8) }
  o = ks_cat(req, o, "\r\n" as *u8)
  return o
78}
79func ks_row(id: i64, ok: i64, what: *u8) -> i64 {
  ks_w("SNAPROW " as *u8)
  let d: *u8 = sys_mmap(8); d[0] = (48 + id/10) as u8; d[1] = (48 + id%10) as u8; d[2] = 32 as u8; d[3] = 0 as u8
  ks_w(d)
  if ok == 1 { ks_w("PASS " as *u8) }
  if ok == 0 { ks_w("FAIL " as *u8) }
  ks_w(what); ks_w("\n" as *u8)
  return ok
87}
88func ks_mkdir(path: *u8, mode: i64) -> i64 { let nb: *i64 = sys_mmap(8) as *i64; nb[0] = 258; return __syscall(nb[0], 0 - 100, path, mode, 0, 0, 0) }
89func ks_writefile(path: *u8, buf: *u8, n: i64) -> i64 { let fd: i64 = sys_openat_wr(path, 0x1a4); if fd < 0 { return 0 } sys_write(fd, buf, n); sys_close(fd); return 1 }
90
91func main() -> i64 {
  ks_mkdir(KS_SITE, 0x1ed)
  cst_copy("knowledge/cms/andelinwest/template.html" as *u8, "/tmp/_cms_snap_site/template.html" as *u8)
  cst_copy("knowledge/cms/andelinwest/content.txt" as *u8, "/tmp/_cms_snap_site/content.txt" as *u8)
  sys_renameat("/tmp/_cms_snap_site/draft.txt" as *u8, "/tmp/_cms_snap_site/draft.stale" as *u8)
  sys_renameat("/tmp/_cms_snap_site/snapshot.nxsnap" as *u8, "/tmp/_cms_snap_site/snapshot.stale" as *u8)
  let dig: *u8 = sys_mmap(32)
  sha256_digest("snap-gate-pw-1" as *u8, 14, dig)
  let hexs: *u8 = sys_mmap(80)
  let hxc: *u8 = "0123456789abcdef" as *u8
  var i: i64 = 0
  while i < 32 { hexs[i*2] = hxc[((dig[i] as i64) >> 4) & 15]; hexs[i*2+1] = hxc[(dig[i] as i64) & 15]; i = i + 1 }
  ks_writefile("/tmp/_cms_snap_site/admin_pw.sha256" as *u8, hexs, 64)
104
  let bpid: i64 = sys_fork()
  if bpid == 0 {
      let dn: i64 = sys_openat_wr("/dev/null" as *u8, 0x1a4)
      if dn >= 0 { sys_dup3(dn, 1, 0); sys_dup3(dn, 2, 0) }
      let bargv: *i64 = sys_mmap(32) as *i64
      bargv[0] = "_offc/nx_sov_build_run.elf" as *u8 as i64
      bargv[1] = "nx_cms_admin" as *u8 as i64
      bargv[2] = 0
      let benvp: *i64 = sys_mmap(16) as *i64; benvp[0] = 0
      sys_execve("_offc/nx_sov_build_run.elf" as *u8, bargv, benvp); sys_exit(127)
  }
  let bst: *i64 = sys_mmap(16) as *i64
  sys_wait4(bpid, bst, 0)
  // CALLER-GAP FIX 2026-08-01 (seq1267 class): the runner emits buildroot/_build/<t>.sov.elf under
  // the no-/tmp doctrine while this probed /tmp. Proven by control: _build copy 208962B, /tmp absent.
  var bchk: i64 = sys_openat_rd("buildroot/_build/nx_cms_admin.sov.elf" as *u8)
  var badm: *u8 = "buildroot/_build/nx_cms_admin.sov.elf" as *u8
  if bchk < 0 { bchk = sys_openat_rd("/tmp/nx_cms_admin.sov.elf" as *u8); badm = "/tmp/nx_cms_admin.sov.elf" as *u8 }
  if bchk < 0 { ks_w("CMSGATE row=nx_cms_snapshot ADMIN-BUILD-MISSING (probed buildroot/_build AND /tmp)\n" as *u8); sys_exit(1) }
  sys_close(bchk)
  let pid: i64 = sys_fork()
  if pid == 0 {
      let lg: i64 = sys_openat_wr("/tmp/_cms_admin_snap_gate.log" as *u8, 0x1a4)
      if lg >= 0 { sys_dup3(lg, 1, 0); sys_dup3(lg, 2, 0) }
      let argvv: *i64 = sys_mmap(8*6) as *i64
      argvv[0] = badm as i64
      argvv[1] = "8091" as *u8 as i64
      argvv[2] = KS_SITE as i64
      argvv[3] = "99" as *u8 as i64
      argvv[4] = 0
      let envp: *i64 = sys_mmap(16) as *i64; envp[0] = 0
      sys_execve(badm, argvv, envp)
      sys_exit(127)
  }
139
  let req: *u8 = sys_mmap(262144)
  let resp: *u8 = sys_mmap(524288)
  let nocookie: *u8 = sys_mmap(8)
  nocookie[0] = 0 as u8
  let sess: *u8 = sys_mmap(64)
  sess[0] = 0 as u8
  let csrf: *u8 = sys_mmap(64)
  csrf[0] = 0 as u8
148
  // K0: boot + login + csrf
  var rn: i64 = 0 - 1
  var tries: i64 = 0
  while tries < 50 {
      let rl0: i64 = ks_get(req, "/" as *u8, nocookie)
      rn = ks_http(req, rl0, resp, 524287)
      if rn > 0 { tries = 50 }
      if rn <= 0 { sys_sleep_ms(100); tries = tries + 1 }
  }
  var pass: i64 = 0
  var rows: i64 = 0
  var ok: i64 = 0
  var rl: i64 = ks_post(req, "/admin/login" as *u8, nocookie, "pw=snap-gate-pw-1" as *u8)
  rn = ks_http(req, rl, resp, 524287)
  if rn > 0 { if ks_has(resp, rn, "303" as *u8) == 1 {
      let sp: i64 = ks_index(resp, rn, "nsess=" as *u8)
      if sp >= 0 {
          var m2: i64 = 0
          while m2 < 32 { sess[m2] = resp[sp+6+m2]; m2 = m2 + 1 }
          sess[32] = 0 as u8
          rl = ks_get(req, "/admin" as *u8, sess)
          rn = ks_http(req, rl, resp, 524287)
          let cp: i64 = ks_index(resp, rn, "name=\"csrf\" value=\"" as *u8)
          if cp >= 0 { var m3: i64 = 0; while m3 < 32 { csrf[m3] = resp[cp+19+m3]; m3 = m3 + 1 } csrf[32] = 0 as u8; ok = 1 }
      }
  } }
  rows = rows + 1; pass = pass + ks_row(0, ok, "login + csrf + editor shows Backup" as *u8)
  var hasbackup: i64 = 0
  if ok == 1 { if ks_has(resp, rn, "Take snapshot" as *u8) == 1 { hasbackup = 1 } }
  rows = rows + 1; pass = pass + ks_row(1, hasbackup, "editor carries snapshot/restore controls" as *u8)
179
  // K2: establish a baseline publish, then snapshot it
  let bodyB: *u8 = sys_mmap(4096)
  var bb: i64 = ks_cat(bodyB, 0, "csrf=" as *u8)
  bb = ks_catn(bodyB, bb, csrf, 32)
  bb = ks_cat(bodyB, bb, "&hero_title=SnapBaselineHeadline" as *u8)
  bodyB[bb] = 0 as u8
  rl = ks_post(req, "/admin/save" as *u8, sess, bodyB)
  ks_http(req, rl, resp, 524287)
  let bodyS: *u8 = sys_mmap(256)
  var bs: i64 = ks_cat(bodyS, 0, "csrf=" as *u8)
  bs = ks_catn(bodyS, bs, csrf, 32)
  bodyS[bs] = 0 as u8
  rl = ks_post(req, "/admin/snapshot" as *u8, sess, bodyS)
  rn = ks_http(req, rl, resp, 524287)
  ok = 0
  if rn > 0 { if ks_has(resp, rn, "303" as *u8) == 1 { ok = 1 } }
  rows = rows + 1; pass = pass + ks_row(2, ok, "snapshot of baseline taken 303" as *u8)
197
  // K3: snapshot downloadable + carries the archive magic
  rl = ks_get(req, "/admin/snapshot.nxsnap" as *u8, sess)
  rn = ks_http(req, rl, resp, 524287)
  ok = 0
  if rn > 0 { if ks_has(resp, rn, "application/octet-stream" as *u8) == 1 { if ks_has(resp, rn, "NXSNAP1" as *u8) == 1 { ok = 1 } } }
  rows = rows + 1; pass = pass + ks_row(3, ok, "snapshot downloadable with archive magic" as *u8)
204
  // K4: change the live content (so restore has something to undo)
  let bodyC: *u8 = sys_mmap(4096)
  var bc: i64 = ks_cat(bodyC, 0, "csrf=" as *u8)
  bc = ks_catn(bodyC, bc, csrf, 32)
  bc = ks_cat(bodyC, bc, "&hero_title=ChangedAfterSnapshot" as *u8)
  bodyC[bc] = 0 as u8
  rl = ks_post(req, "/admin/save" as *u8, sess, bodyC)
  ks_http(req, rl, resp, 524287)
  rl = ks_get(req, "/" as *u8, nocookie)
  rn = ks_http(req, rl, resp, 524287)
  ok = 0
  if rn > 0 { if ks_has(resp, rn, "ChangedAfterSnapshot" as *u8) == 1 { ok = 1 } }
  rows = rows + 1; pass = pass + ks_row(4, ok, "live content changed after snapshot" as *u8)
218
  // K5: RESTORE -> live page byte-back to the baseline (and the change is gone)
  let bodyR: *u8 = sys_mmap(256)
  var br: i64 = ks_cat(bodyR, 0, "csrf=" as *u8)
  br = ks_catn(bodyR, br, csrf, 32)
  bodyR[br] = 0 as u8
  rl = ks_post(req, "/admin/restore" as *u8, sess, bodyR)
  rn = ks_http(req, rl, resp, 524287)
  ok = 0
  if rn > 0 { if ks_has(resp, rn, "303" as *u8) == 1 {
      rl = ks_get(req, "/" as *u8, nocookie)
      rn = ks_http(req, rl, resp, 524287)
      if rn > 0 { if ks_has(resp, rn, "SnapBaselineHeadline" as *u8) == 1 { if ks_has(resp, rn, "ChangedAfterSnapshot" as *u8) == 0 { ok = 1 } } }
  } }
  rows = rows + 1; pass = pass + ks_row(5, ok, "restore brings back baseline byte-exact" as *u8)
233
  // K6: restore is session+CSRF guarded (unauth refused, change preserved)
  rl = ks_post(req, "/admin/restore" as *u8, nocookie, "csrf=00000000000000000000000000000000" as *u8)
  rn = ks_http(req, rl, resp, 524287)
  ok = 0
  if rn > 0 { if ks_has(resp, rn, "403" as *u8) == 1 { ok = 1 } }
  rows = rows + 1; pass = pass + ks_row(6, ok, "restore refused without session 403" as *u8)
240
  // ---- teardown ----
  nxk_kill(pid, 9)
  let stbuf: *i64 = sys_mmap(16) as *i64
  sys_wait4(pid, stbuf, 0)
245
  var verdict: *u8 = "FAIL" as *u8
  if pass == rows { verdict = "PASS" as *u8 }
  let line: *u8 = sys_mmap(512)
  var lo: i64 = ks_cat(line, 0, "CMSGATE row=nx_cms_snapshot rows=" as *u8)
  let t2: *u8 = sys_mmap(24)
  var mm: i64 = rows
  var kk: i64 = 0
  if mm == 0 { t2[0] = 48 as u8; kk = 1 }
  while mm > 0 { t2[kk] = (48 + (mm % 10)) as u8; mm = mm / 10; kk = kk + 1 }
  var ii: i64 = 0
  while ii < kk { line[lo] = t2[kk-1-ii]; lo = lo + 1; ii = ii + 1 }
  lo = ks_cat(line, lo, " pass=" as *u8)
  mm = pass; kk = 0
  if mm == 0 { t2[0] = 48 as u8; kk = 1 }
  while mm > 0 { t2[kk] = (48 + (mm % 10)) as u8; mm = mm / 10; kk = kk + 1 }
  ii = 0
  while ii < kk { line[lo] = t2[kk-1-ii]; lo = lo + 1; ii = ii + 1 }
  lo = ks_cat(line, lo, " verdict=" as *u8)
  lo = ks_cat(line, lo, verdict)
  lo = ks_cat(line, lo, " epoch=" as *u8)
  mm = sys_now_realtime_sec(); kk = 0
  if mm == 0 { t2[0] = 48 as u8; kk = 1 }
  while mm > 0 { t2[kk] = (48 + (mm % 10)) as u8; mm = mm / 10; kk = kk + 1 }
  ii = 0
  while ii < kk { line[lo] = t2[kk-1-ii]; lo = lo + 1; ii = ii + 1 }
  line[lo] = 10 as u8
  lo = lo + 1
  sys_write(1, line, lo)
  let gf: i64 = sys_openat_append("knowledge/status/cms_gate.log" as *u8, 0x1a4)
  if gf >= 0 { sys_write(gf, line, lo); sys_close(gf) }
  if pass == rows { sys_exit(0) }
  sys_exit(1)
  return 1
279}
nx_cms_snapshot_gate.nx source

`nx_cms_snapshot_gate.nx` source
