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RSX112/25-05-20/README.md

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+# RSX 112 20-05-2025
+
+## La Cryptographie
+
+Identifié la personne, envoyer un message de manière intègre. 
+
+Primitive chyptographique, qui va chrypter, chiffrer, etc un msg
+
+Primitive chyptographique : Procécus de chiffrement et de chiffrement
+
+## TP 5 :
+
+
+mdp 1 -> 1 sec
+mdp 2 -> 1 sec
+mdp 3 -> 1 sec
+mdp 4 -> 10 sec
+mdp 5 -> 3 min
+mdp 6 -> plusieurs heures potentiel.
+
+
+
+┌──(nk㉿nk-kali)-[~/Zip-Files]
+└─$ fcrackzip -vul 1 file-A-1.zip
+found file 'user_credentials_1.txt', (size cp/uc    271/   442, flags 9, chk 3c3d)
+found file 'user_credentials_2.txt', (size cp/uc    270/   442, flags 9, chk 3c3d)
+found file 'user_credentials_3.txt', (size cp/uc    272/   445, flags 9, chk 3c3d)
+
+
+PASSWORD FOUND!!!!: pw == B
+                                                                        
+┌──(nk㉿nk-kali)-[~/Zip-Files]
+└─$ fcrackzip -vul 2 file-A-2.zip
+found file 'user_credentials_4.txt', (size cp/uc    267/   437, flags 9, chk 3c3d)
+found file 'user_credentials_5.txt', (size cp/uc    259/   433, flags 9, chk 3c3d)
+found file 'user_credentials_6.txt', (size cp/uc    271/   442, flags 9, chk 3c3d)
+
+
+PASSWORD FOUND!!!!: pw == R2
+
+┌──(nk㉿nk-kali)-[~/Zip-Files]
+└─$ fcrackzip -vul 3 file-A-3.zip
+found file 'user_credentials_7.txt', (size cp/uc    271/   443, flags 9, chk 3c3d)
+found file 'user_credentials_8.txt', (size cp/uc    266/   435, flags 9, chk 3c3d)
+found file 'user_credentials_9.txt', (size cp/uc    264/   437, flags 9, chk 3c3d)
+
+
+PASSWORD FOUND!!!!: pw == 0B1
+
+┌──(nk㉿nk-kali)-[~/Zip-Files]
+└─$ fcrackzip -vul 4 file-A-4.zip
+found file 'user_credentials_10.txt', (size cp/uc    250/   420, flags 9, chk 3c3d)
+found file 'user_credentials_11.txt', (size cp/uc    252/   422, flags 9, chk 3c3d)
+found file 'user_credentials_12.txt', (size cp/uc    261/   433, flags 9, chk 3c3d)
+checking pw W&t~                                    
+
+PASSWORD FOUND!!!!: pw == Y0Da
+
+┌──(nk㉿nk-kali)-[~/Zip-Files]
+└─$ fcrackzip -vul 5 file-A-5.zip
+found file 'user_credentials_13.txt', (size cp/uc    279/   452, flags 9, chk 3c3d)
+found file 'user_credentials_14.txt', (size cp/uc    256/   427, flags 9, chk 3c3d)
+found file 'user_credentials_15.txt', (size cp/uc    264/   434, flags 9, chk 3c3d)
+checking pw C+GN~                                   
+
+PASSWORD FOUND!!!!: pw == C-3P0
+
+TP 6 :
+
+Exercice 1
+
+Bonjour cher agent ! Votre prochaine mission, si vous 
+l'acceptez bien sur, sera d'infiltrer le reseau 
+souterrain ou se cache nos ennemis. Rendez-vous a 
+Nantes le 29 avril pour le debut de votre mission
+
+Exercice 2
+

RSX112/25-05-20/flag.txt

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+v ubcfb osu ymoqsuu n cxqfj dqmfnu ub vjcfqu juz amqjmruz zmsscfusb bquflu auoquz hfszbms zwfba ju wusbms qusbqu ncsz ju vmo z uddmqvcfb n uxfbuq ju xusb wcoxcfz fj eczzc qcefnuwusb jc emqbu xfbquu no ijmv nuz wcfzmsz nu jc xfvbmfqu ecz czzul qcefnuwusb vueusncsb emoq uweuvauq kou z usrmoddqu us wuwu buwez kou jof os bmoqifjjms nu emozzfuqu ub nu zciju ju acjj zusbcfb ju vamo vofb ub ju xfuog bcefz c j osu nu zuz ugbquwfbuz osu cddfvau nu vmojuoq bqme xczbu emoq vu nuejmfuwusb fsbuqfuoq ubcfb vjmouu co woq ujju quequzusbcfb zfwejuwusb os usmqwu xfzcru jcqru nu ejoz n os wubqu ju xfzcru n os amwwu n usxfqms kocqcsbu vfsk csz c j uecfzzu wmozbcvau smfqu cog bqcfbz cvvusbouz ub iucog hfszbms zu nfqfruc xuqz j uzvcjfuq fj ubcfb fsobfju n uzzcpuq nu equsnqu j czvuszuoq wuwu cog wufjjuoquz uemkouz fj dmsvbfmsscfb qcquwusb cvboujjuwusb n cfjjuoqz ju vmoqcsb ujuvbqfkou ubcfb vmoeu ncsz jc ymoqsuu v ubcfb osu nuz wuzoquz n uvmsmwfu eqfzuz us xou nu jc zuwcfsu nu jc acfsu

RSX112/25-05-20/tp3ex2.py

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+import os 
+from Crypto.Util.number import long_to_bytes 
+from Crypto.Util.strxor import strxor 
+ 
+FLAG = open("/home/nk/Documents/UTEC-Lic_ME_2024_2025/RSX112/RSX112-20-05-2025/flag.txt", "rb").read() 
+key = os.urandom(4) * 20 
+c = strxor(FLAG, key[:len(FLAG)]) 
+print(c.hex())