First part of TD9

content/secu_logicielle/td9-hackme/files/Makefile

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+pframe:
+	curl -o pframe.tgz  https://dept-info.labri.fr/~thibault/SecuLog/pframe.tgz && \
+		tar -xf pframe.tgz &&\
+		rm -rf pframe.tgz
+
+.gdbinit:
+
+configure: pframe .gdbinit
+	$(shell echo "python import pframe" > .gdbinit) 
+
+PHONY: %
+gdb: configure
+	PYTHONPATH=${PWD}/pframe${PYTHONPATH:+:${PYTHONPATH}} \
+			   gdb hackme
+
+PHONY: clean
+clean:
+	@rm -rf $(BUILD_DIR) pframe .gdbinit

content/secu_logicielle/td9-hackme/files/level3.py

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+#!/bin/env python3
+
+hextext = "6572754521614b"
+finaltext = ""
+cleartext = ""
+for i in range(0, len(hextext) - 1, 2):
+    c = '{}{}'.format(hextext[i], hextext[i+1])
+    cleartext += (chr(int(c, 16)))
+print(cleartext)
+cur_size=0
+bits_processed=0
+for i in range(0, len(cleartext) - 1, 4):
+    if (len(cleartext) - 4 * bits_processed) > 4:
+        cur_size = 4
+    else:
+        cur_size = len(cleartext) - 4 * bits_processed
+    for j in range(i+cur_size,i,-1):
+        finaltext += cleartext[j-1]
+    bits_processed+=1
+print('Level 3 text: {}'.format(finaltext))

content/secu_logicielle/td9-hackme/files/level4.py

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+#!/bin/env python3
+import sys
+hextext = "66737a65"
+finaltext = ""
+cleartext = ""
+for i in range(0, len(hextext) - 1, 2):
+    c = '{}{}'.format(hextext[i], hextext[i+1])
+    cleartext += chr(int(c, 16) ^ 0x12)
+cur_size=0
+bits_processed=0
+for i in range(0, len(cleartext) - 1, 4):
+    if (len(cleartext) - 4 * bits_processed) > 4:
+        cur_size = 4
+    else:
+        cur_size = len(cleartext) - 4 * bits_processed
+    for j in range(i+cur_size,i,-1):
+        finaltext += cleartext[j-1]
+    bits_processed+=1
+print('Level 3 text: {}'.format(finaltext))