docs: create GEMASTIK 2026 Warmup writeups (ch1-14) via MCP DB API

- Deleted all 14 dummy docs from DB + filesystem
- Created 14 Gemastik warmup writeups + index via create_document API (DB-first)
- ch1-ch12: encoding/stego/web/pwn basics
- ch13: RSA small factors
- ch14: RSA special integers via paper-search (GCD with paper appendix primes)
- All 15 docs indexed and live at wiki.asepharyana.my.id

content/writeups/gemastik-2026-warmup/_index.md

@@ -1,5 +1,16 @@
 ---
 title: "GEMASTIK 2026 Warmup — All Chapters"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "writeup-index"]
+path: "writeups/gemastik-2026-warmup/_index.md"
+created_at: "2026-08-21T07:17:48.670Z"
+updated_at: "2026-08-21T07:17:48.670Z"
+---
+---
+title: "GEMASTIK 2026 Warmup — All Chapters"
 event: "GEMASTIK 2026 Warmup"
 category: "index"
 points: 0
@@ -28,21 +39,20 @@ difficulty: "index"
 | 13 | Slopped | RSA small factors | medium | `GEMASTIK19{qu4ntum_c0mput3r_br0k3_rs4_y0u_sh0uld_us3_p4p3r_s34rch_mcp_sk1ll}` |
 | 14 | Slopped wave-2 | RSA paper search | hard | `GEMASTIK19{test_vector_of_listP_on_quant}` |
 
-## Ringkasan Metode
+### Ringkasan Metode
-
 | Ch | Metode | Tool |
 |----|--------|------|
-| 1 | Double Base64 | `base64 -d` ×2 |
+| 1 | Double Base64 | base64 -d ×2 |
-| 2 | ROT13 Caesar | `codecs.encode(s, "rot_13")` |
+| 2 | ROT13 Caesar | codecs.encode(s, "rot_13") |
-| 3 | strings | `strings secret.bin` |
+| 3 | strings | strings secret.bin |
-| 4 | EXIF metadata | `strings photo.jpg` |
+| 4 | EXIF metadata | strings photo.jpg |
-| 5 | HTML comment | `curl \| grep '<!--'` |
+| 5 | HTML comment | curl \| grep '<!--' |
-| 6 | Base64 cookie | `base64 -d` |
+| 6 | Base64 cookie | base64 -d |
 | 7 | ASCII codes | chr() decoding |
 | 8 | Single-byte XOR | XOR 0x42 |
 | 9 | Stack overflow | buffer > admin |
 | 10 | ret2win + align | ROP chain |
-| 11 | PNG strings | `strings kucing.png` |
+| 11 | PNG strings | strings kucing.png |
-| 12 | Hex→Base64 | `bytes.fromhex` + `b64decode` |
+| 12 | Hex→Base64 | bytes.fromhex + b64decode |
 | 13 | RSA small factors | trial division / sympy factorint |
 | 14 | RSA special integers | GCD with paper appendix primes |

content/writeups/gemastik-2026-warmup/ch1-sixty-four.md

@@ -1,13 +1,20 @@
 ---
 title: "Sixty Four — Double Base64"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "crypto"]
+path: "writeups/gemastik-2026-warmup/ch1-sixty-four.md"
+created_at: "2026-08-21T07:25:17.079Z"
+updated_at: "2026-08-21T07:25:17.079Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Sixty Four"
+challenge: "Sixty Four — Double Base64"
 category: "crypto"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{b4s3_s1xty_f0ur_warm1ng_up}"
 ---
-
 # Sixty Four (500 pts) — Encoding
 
 **File:** `chall.txt` → `UjBWTlFWTlVTVXN4T1h0aU5ITXpYM014ZUhSNVgyWXdkWEpmZDJGeWJURnVaMTkxY0gwPQ==`

content/writeups/gemastik-2026-warmup/ch10-call-me.md

@@ -1,13 +1,20 @@
 ---
 title: "Call Me — ret2win"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "pwn"]
+path: "writeups/gemastik-2026-warmup/ch10-call-me.md"
+created_at: "2026-08-21T07:25:43.282Z"
+updated_at: "2026-08-21T07:25:43.282Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Call Me"
+challenge: "Call Me — ret2win"
 category: "pwn"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{r3t2w1n_l0mpat_k3_win}"
 ---
-
 # Call Me (500 pts) — Pwn / ret2win
 
 **Server:** `nc 15.232.89.109 9002`

content/writeups/gemastik-2026-warmup/ch11-behind-the-picture.md

@@ -1,13 +1,20 @@
 ---
 title: "Behind the Picture — PNG Strings"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "forensics"]
+path: "writeups/gemastik-2026-warmup/ch11-behind-the-picture.md"
+created_at: "2026-08-21T07:25:45.672Z"
+updated_at: "2026-08-21T07:25:45.672Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Behind the Picture"
+challenge: "Behind the Picture — PNG Strings"
 category: "forensics"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{c4t_g4mbar_ada_flag}"
 ---
-
 # Behind the Picture (500 pts) — Steganografi / PNG
 
 **File:** `kucing.png` (cat image)

content/writeups/gemastik-2026-warmup/ch12-layers.md

@@ -1,13 +1,20 @@
 ---
 title: "Layers — Hex to Base64 Chain"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "crypto"]
+path: "writeups/gemastik-2026-warmup/ch12-layers.md"
+created_at: "2026-08-21T07:25:48.559Z"
+updated_at: "2026-08-21T07:25:48.559Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Layers"
+challenge: "Layers — Hex to Base64 Chain"
 category: "crypto"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{h3x_lQlu_b4s3_ch41n}"
 ---
-
 # Layers (500 pts) — Encoding chain
 
 **File:** `chall.txt` → `5230564e51564e55535573784f58746f4d33686662464673645639694e484d7a58324e6f4e44467566513d3d`

content/writeups/gemastik-2026-warmup/ch13-slopped.md

@@ -1,11 +1,19 @@
 ---
 title: "Slopped — RSA Small Factors"
-event: "GEMASTIK 2026 Warmup"
+type: "writeup"
-challenge: "Slopped"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "crypto"]
+path: "writeups/gemastik-2026-warmup/ch13-slopped.md"
+created_at: "2026-08-21T07:26:21.304Z"
+updated_at: "2026-08-21T07:26:21.304Z"
 category: "crypto"
-points: 500
+challenge: "Slopped"
 difficulty: "medium"
+event: "GEMASTIK 2026 Warmup"
 flag: "GEMASTIK19{qu4ntum_c0mput3r_br0k3_rs4_y0u_sh0uld_us3_p4p3r_s34rch_mcp_sk1ll}"
+points: 500
 ---
 
 # Slopped (500 pts) — Crypto / RSA small factors
@@ -25,7 +33,8 @@ c = pow(flag, e, n)
 ## Analisis
 
 RSA dengan `e = 0x10001`, `n` 2048-bit, `c = pow(flag, e, n)`.
-`n` dibangun dari **faktor prima kecil** (sloppy primes — "my AI broke RSA with 1 billion qubits"). Faktorisasi temukan prima kecil lewat trial division, lalu `phi = prod(p_i - 1)`, `d = e⁻¹ mod phi`, dan `m = pow(c, d, n)`.
+`n` dibangun dari **faktor prima kecil** (sloppy primes — "my AI broke RSA with
+1 billion qubits"). Faktorisasi temukan prima kecil lewat trial division, lalu `phi = prod(p_i - 1)`, `d = e⁻¹ mod phi`, dan `m = pow(c, d, n)`.
 
 ## Solusi
 
@@ -37,7 +46,6 @@ e = 0x10001
 n = 0xdb...  # 2048-bit modulus
 c = 0x...
 
-# Trial division menemukan faktor kecil
 factors = factorint(n)
 print(factors)
 # {83: 1, 233: 1, 9679: 1, <big_prime>: 1}
@@ -56,4 +64,4 @@ print(long_to_bytes(m))
 
 `GEMASTIK19{qu4ntum_c0mput3r_br0k3_rs4_y0u_sh0uld_us3_p4p3r_s34rch_mcp_sk1ll}`
 
-> Flag ini adalah petunjuk untuk ch14 ("you should use paper search").
+> Flag ini adalah petunjuk untuk ch14 (paper search).

content/writeups/gemastik-2026-warmup/ch14-slopped-wave2.md

@@ -1,13 +1,20 @@
 ---
 title: "Slopped wave-2 — RSA Special Integers (Paper Search)"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "crypto"]
+path: "writeups/gemastik-2026-warmup/ch14-slopped-wave2.md"
+created_at: "2026-08-21T07:25:51.729Z"
+updated_at: "2026-08-21T07:25:51.729Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Slopped wave-2"
+challenge: "Slopped wave-2 — RSA Special Integers (Paper Search)"
 category: "crypto"
 points: 501
 difficulty: "hard"
 flag: "GEMASTIK19{test_vector_of_listP_on_quant}"
 ---
-
 # Slopped wave-2 (501 pts) — Crypto / RSA "special integers"
 
 **File:** `chals.py` — Kategori: `crypto, misc`
@@ -31,20 +38,20 @@ print(c)
 ## Analisis Serangan
 
 Semua serangan standar gagal:
-- **Fermat** (close primes): gap > 1.2×10^159 — tidak dekat secara praktis
+- **Fermat** (close primes): gap > 1.2×10^159
-- **ECM**: tidak smooth (B1=43M, nihil)
+- **ECM**: tidak smooth (B1=43M)
 - **Pollard p-1**: B=2M — tidak smooth
 - **ROCA**: n mod M bukan pangkat 65537
-- **Wiener / Boneh-Durfee**: e kecil (0x10001) berarti d besar — tidak berlaku
+- **Wiener / Boneh-Durfee**: e kecil berarti d besar
-- **Trial division** ke 10M: bersih (bukan multi-prime)
+- **Trial division** ke 10M: bersih
 
 ### Hint "paper search"
 
-Hint eksplisit dari ch13 (`"you should use paper search mcp skill"`) mengarah ke paper akademik.
+Hint dari ch13 ("you should use paper search mcp skill") mengarah ke paper akademik.
 
-Paper yang relevan: **[Wang et al., "A First Successful Factorization of RSA-2048 Integer by D-Wave Quantum Computer (TST 2024.9010028)"](https://www.sciopen.com/article/10.26599/TST.2024.9010028)**.
+Paper: **[Wang et al., "A First Successful Factorization of RSA-2048 Integer by D-Wave Quantum Computer (TST 2024.9010028)"](https://www.sciopen.com/article/10.26599/TST.2024.9010028)**.
 
-Paper ini mendefinisikan **"special integer"**: `n = p·q` di mana kedua prima berbeda tepat 2 bit (`popcount(p XOR q) = 2`). Appendix Table S1 berisi 10 contoh (N, p, q) yang **menggunakan kembali prima yang sama** antar contoh — inilah "sloppiness" wave-2: modulus challenge merekonstruksi ulang dua prima dari dua contoh berbeda di appendix.
+Paper mendefinisikan **"special integer"**: `n = p·q` di mana kedua prima berbeda tepat 2 bit (`popcount(p XOR q) = 2`). Appendix Table S1 berisi 10 contoh (N, p, q) yang **menggunakan kembali prima yang sama** — inilah "sloppiness" wave-2: modulus challenge merekonstruksi ulang dua prima dari dua contoh berbeda.
 
 ## Solusi
 
@@ -54,16 +61,12 @@ Hitung `gcd(n, P_i)` untuk setiap prima `P_i` di 10 contoh paper:
 import math
 from Crypto.Util.number import long_to_bytes
 
-n = 280088984259197676303322409340162768479248055253332178324048979479391032432289729496895136889553954879681054017549377236761031572728785368094833820151098377195413332119600135231380112995454122165424468980135704765977852529569814690639351847175244215778770376263888879859156353972612170752463744913383401062048491249958029243091765282473774483093168121753713425292265614066847042063133253723914013765258726038858443157129746991645277096281312454572347302870277064727079382216834376085631299651357Line truncated
+n = <2048-bit modulus from challenge>
-
 e = 0x10001
-c = 0x...  # dari challenge
+c = <ciphertext>
 
-# Dari appendix paper: 10 contoh, setiap contoh punya p & q
+# 10 contoh dari appendix paper, setiap contoh punya (p, q)
-paper_examples = [
+paper_examples = [...]
-    # (p_i, q_i) — faktor dari 10 contoh paper
-    ... 
-]
 
 for ex in paper_examples:
     for P in (ex.p, ex.q):
@@ -71,7 +74,6 @@ for ex in paper_examples:
         if 1 < g < n:
             p_factor = g
             q_factor = n // g
-            print(f"Found factor via GCD with paper prime!")
             break
 
 phi = (p_factor - 1) * (q_factor - 1)

content/writeups/gemastik-2026-warmup/ch2-julius.md

@@ -1,13 +1,20 @@
 ---
 title: "Julius — ROT13 Caesar Cipher"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "crypto"]
+path: "writeups/gemastik-2026-warmup/ch2-julius.md"
+created_at: "2026-08-21T07:25:20.120Z"
+updated_at: "2026-08-21T07:25:20.120Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Julius"
+challenge: "Julius — ROT13 Caesar Cipher"
 category: "crypto"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{caesar_r0t_th1rt33n_klasik}"
 ---
-
 # Julius (500 pts) — Caesar / ROT13
 
 **File:** `chall.txt` → `TRZNFGVX19{pnrfne_e0g_gu1eg33a_xynfvx}`

content/writeups/gemastik-2026-warmup/ch3-needle.md

@@ -1,13 +1,20 @@
 ---
 title: "Needle — Strings Binary"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "forensics"]
+path: "writeups/gemastik-2026-warmup/ch3-needle.md"
+created_at: "2026-08-21T07:25:23.053Z"
+updated_at: "2026-08-21T07:25:23.053Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Needle"
+challenge: "Needle — Strings Binary"
 category: "forensics"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{str1ngs_c4n_f1nd_m3}"
 ---
-
 # Needle (500 pts) — Steganografi / Binary
 
 **File:** `secret.bin` (748 bytes, binary)

content/writeups/gemastik-2026-warmup/ch4-say-cheese.md

@@ -1,13 +1,20 @@
 ---
 title: "Say Cheese — EXIF Metadata"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "forensics"]
+path: "writeups/gemastik-2026-warmup/ch4-say-cheese.md"
+created_at: "2026-08-21T07:25:25.953Z"
+updated_at: "2026-08-21T07:25:25.953Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Say Cheese"
+challenge: "Say Cheese — EXIF Metadata"
 category: "forensics"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{h1dd3n_1n_m3tadata_exif}"
 ---
-
 # Say Cheese (500 pts) — Steganografi / Metadata
 
 **File:** `photo.jpg`

content/writeups/gemastik-2026-warmup/ch5-nothing-here.md

@@ -1,13 +1,20 @@
 ---
 title: "Nothing Here — Web Comment"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "web"]
+path: "writeups/gemastik-2026-warmup/ch5-nothing-here.md"
+created_at: "2026-08-21T07:25:28.880Z"
+updated_at: "2026-08-21T07:25:28.880Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Nothing Here"
+challenge: "Nothing Here — Web Comment"
 category: "web"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{v13w_s0urc3_pahlawan}"
 ---
-
 # Nothing Here (500 pts) — Web
 
 **URL:** `http://15.232.89.109:8001/`

content/writeups/gemastik-2026-warmup/ch6-sweet-cookie.md

@@ -1,13 +1,20 @@
 ---
 title: "Sweet Cookie — Base64 Cookie"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "web"]
+path: "writeups/gemastik-2026-warmup/ch6-sweet-cookie.md"
+created_at: "2026-08-21T07:25:31.627Z"
+updated_at: "2026-08-21T07:25:31.627Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Sweet Cookie"
+challenge: "Sweet Cookie — Base64 Cookie"
 category: "web"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{c00k13_b4s3_d3c0d3}"
 ---
-
 # Sweet Cookie (500 pts) — Web
 
 **URL:** `http://15.232.89.109:8002/`

content/writeups/gemastik-2026-warmup/ch7-open-book.md

@@ -1,13 +1,20 @@
 ---
 title: "Open Book — Python Source"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "misc"]
+path: "writeups/gemastik-2026-warmup/ch7-open-book.md"
+created_at: "2026-08-21T07:25:34.522Z"
+updated_at: "2026-08-21T07:25:34.522Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Open Book"
+challenge: "Open Book — Python Source"
 category: "misc"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{pyth0n_s0urc3_t3rbuka}"
 ---
-
 # Open Book (500 pts) — Misc / Source
 
 **File:** `chall.py`

content/writeups/gemastik-2026-warmup/ch8-back-and-forth.md

@@ -1,13 +1,20 @@
 ---
 title: "Back and Forth — XOR"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "reverse"]
+path: "writeups/gemastik-2026-warmup/ch8-back-and-forth.md"
+created_at: "2026-08-21T07:25:37.394Z"
+updated_at: "2026-08-21T07:25:37.394Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Back and Forth"
+challenge: "Back and Forth — XOR"
 category: "reverse"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{x0r_it_back_4gain}"
 ---
-
 # Back and Forth (500 pts) — Reversing / XOR
 
 **File:** `chall.c`

content/writeups/gemastik-2026-warmup/ch9-are-you-admin.md

@@ -1,13 +1,20 @@
 ---
 title: "Are You Admin? — Buffer Overflow"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "pwn"]
+path: "writeups/gemastik-2026-warmup/ch9-are-you-admin.md"
+created_at: "2026-08-21T07:25:39.978Z"
+updated_at: "2026-08-21T07:25:39.978Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Are You Admin?"
+challenge: "Are You Admin? — Buffer Overflow"
 category: "pwn"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{0v3rfl0w_ubah_var}"
 ---
-
 # Are You Admin? (500 pts) — Pwn / Buffer Overflow
 
 **Server:** `nc 15.232.89.109 9001`