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Code License: AGPL v3 Non-Code License: CC BY-NC-SA 4.0 Stars

This repository contains official source code and writeups for the majority of challenges in SekaiCTF 2022.

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Cryptography

Name Author Difficulty Solves
Time Capsule sahuang Easy (1) 178
FaILProof deuterium Normal (2) 62
Secure Image Encryption Yanhu1 & sahuang Normal (2) 49
Diffecient deuterium Hard (3) 7
EZMaze Utaha Hard (3) 11
Robust CBC sahuang & Yanhu1 Expert (4) 10
FaILProof Revenge deuterium Expert (4) 16

Forensics

Name Author Difficulty Solves
Blind Infection 1 Battlemonger Normal (2) 23
Broken Converter pamLELcu Normal (2) 94
Blind Infection 2 Battlemonger Hard (3) 15
flag Mono pamLELcu Hard (3) 47
Symbolic Needs 1 Battlemonger Hard (3) 24
Symbolic Needs 2 Battlemonger Expert (4) 18

Miscellaneous

Name Author Difficulty Solves
Console Port pamLELcu Easy (1) 291
Sus pamLELcu Easy (1) 95
Vocaloid Heardle pamLELcu Normal (2) 54
Matryoshka pamLELcu Expert (4) 14
Random Song Yanhu1 Hard (3) 13
Borpa ElleuchX1 Master (5) 4

PPC

Name Author Difficulty Solves
Let's Play Osu!Mania sahuang Easy (1) 273
Electric Box sahuang Hard (3) 36
Pafs Radewoosh Hard (3) 16
Mind Calculator pamLELcu Expert (4) 16
Console Port Pro pamLELcu Master (5) 7

Binary Exploitation

Name Author Difficulty Solves
Save Me Jonathan Normal (2) 44
Hello World Setup Jonathan Hard (3) 7
BFS Zafirr Expert (4) 2
gets 4n0nym4u5 Master (5) 2
GFT Triacontakai Master (5) 2

Reverse Engineering

Name Author Difficulty Solves
Perfect Match X-treme sahuang & enscribe Easy (1) 111
Matrix Lab 1 sahuang Easy (1) 191
Matrix Lab 2 sahuang Normal (2) 80
Matrix Lab 3 sahuang Hard (3) 19
Baby Chicken sahuang Expert (4) 6
Berserk joezid Master (5) 2

Web

Name Author Difficulty Solves
Bottled Poem bwjy Easy (1) 146
Sekai Game Start bwjy Normal (2) 63
Issues Rik Hard (3) 49
Crab Commodities Strellic Hard (3) 30
Safelist Strellic Expert (4) 3
Obligatory Calc Strellic Master (5) 1

License

Any program and/or source code in this repository is licensed under the GNU Affero General Public License version 3:

SEKAI CTF 2022 Challenges and Solutions
Copyright (C) 2022 Project SEKAI CTF team and contributors

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.

Any non-code/program content (writeups, READMEs, descriptions) in this repository is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0):

SEKAI CTF 2022 Challenges and Solutions by Project SEKAI CTF team and contributors is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.