# The CTF Recipes

## The CTF Recipes

- [Introduction](https://www.ctfrecipes.com/readme.md)
- [Introduction](https://www.ctfrecipes.com/cryptography/reconnaissance.md)
- [General knowledge](https://www.ctfrecipes.com/cryptography/general-knowledge.md)
- [Encoding](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding.md): Data standard
- [Character encoding](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/character-encoding.md)
- [ASCII](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/character-encoding/ascii.md)
- [Unicode](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/character-encoding/unicode.md)
- [UTF-8](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/character-encoding/utf-8.md)
- [Data encoding](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/data-encoding.md)
- [Base16](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/data-encoding/base16.md): Hexadecimal encoding
- [Base32](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/data-encoding/base32.md)
- [Base64](https://www.ctfrecipes.com/cryptography/general-knowledge/encoding/data-encoding/base64.md)
- [Maths](https://www.ctfrecipes.com/cryptography/general-knowledge/maths.md)
- [Modular arithmetic](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic.md)
- [Greatest Common Divisor](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic/greatest-common-divisor.md)
- [Fermat's little theorem](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic/fermats-little-theorem.md)
- [Quadratic residues](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic/quadratic-residues.md)
- [Tonelli-Shanks](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic/tonelli-shanks.md)
- [Chinese Remainder Theorem](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic/chinese-remainder-theorem.md)
- [Modular binomial](https://www.ctfrecipes.com/cryptography/general-knowledge/maths/modular-arithmetic/modular-binomial.md)
- [Padding](https://www.ctfrecipes.com/cryptography/general-knowledge/padding.md)
- [PKCS#7](https://www.ctfrecipes.com/cryptography/general-knowledge/padding/pkcs-7.md)
- [Misc](https://www.ctfrecipes.com/cryptography/misc.md)
- [XOR](https://www.ctfrecipes.com/cryptography/misc/xor.md)
- [Mono-alphabetic substitution](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution.md)
- [Index of coincidence](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/index-of-coincidence.md)
- [frequency analysis](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/frequency-analysis.md)
- [Well known algorithms](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms.md)
- [Scytale](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/scytale.md): Spartan cipher
- [ROT](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/rot.md): Caesar & ROT13
- [Polybe](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/polybe.md): Cipher square
- [Vigenere](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/vigenere.md)
- [Pigpen cipher](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/pigpen-cipher.md): Masonic cipher
- [Affine cipher](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/affine-cipher.md)
- [Symmetric Cryptography](https://www.ctfrecipes.com/cryptography/symmetric-cryptography.md)
- [AES](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes.md): The Rijndael scheme
- [Block Encryption procedure](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/block-encryption-procedure.md)
- [Byte Substitution](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/block-encryption-procedure/byte-substitution.md)
- [Shift Row](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/block-encryption-procedure/shift-row.md)
- [Mix Column](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/block-encryption-procedure/mix-column.md)
- [Add Key](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/block-encryption-procedure/add-key.md)
- [Key Expansion / Key Schedule](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/block-encryption-procedure/key-expansion-key-schedule.md)
- [Mode of Operation](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation.md)
- [ECB](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ecb.md): Electronic Codebook Block
- [Block shuffling](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ecb/block-shuffling.md)
- [Challenge example](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ecb/block-shuffling/challenge-example.md): Arbitrary token
- [ECB Oracle](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ecb/ecb-oracle.md)
- [Challenge example](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ecb/ecb-oracle/challenge-example.md)
- [CBC](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/cbc.md): Cipher Block Chaining
- [Bit flipping](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/cbc/bit-flipping.md)
- [Challenge example](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/cbc/bit-flipping/challenge-example.md)
- [Padding oracle](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/cbc/padding-oracle.md)
- [Challenge example](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/cbc/padding-oracle/challenge-example.md)
- [OFB](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ofb.md): Output Feedback
- [Key stream reconstruction](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ofb/key-stream-reconstruction.md)
- [Encrypt to Uncrypt](https://www.ctfrecipes.com/cryptography/symmetric-cryptography/aes/mode-of-operation/ofb/encrypt-to-uncrypt.md): Encrypt + Encrypt = plaintext
- [General knowledge](https://www.ctfrecipes.com/pwn/general-knowledge.md): Pwn refers to the exploitation of a vulnerability in a binary to gain access to sensitive data or gain unauthorized control over the service.
- [STACK](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-stack.md): The stack is a data structure that operates as a last-in-first-out (LIFO) structure
- [Variables storage](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-stack/variables-storage.md)
- [Stack frame](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-stack/stack-frame.md)
- [PLT and GOT](https://www.ctfrecipes.com/pwn/general-knowledge/plt-and-got.md): Dynamic Linking
- [HEAP](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-heap.md)
- [HEAP operations](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-heap/heap-operations.md)
- [Chunk](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-heap/chunk.md)
- [Bins](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-heap/bins.md): Free chunks collections
- [Chunk allocation and reallocation](https://www.ctfrecipes.com/pwn/general-knowledge/operation-of-the-heap/chunk-allocation-and-reallocation.md)
- [Syscall](https://www.ctfrecipes.com/pwn/general-knowledge/syscall.md): System Call
- [Architectures](https://www.ctfrecipes.com/pwn/architectures.md)
- [aarch32](https://www.ctfrecipes.com/pwn/architectures/aarch32.md)
- [Registers](https://www.ctfrecipes.com/pwn/architectures/aarch32/registers.md)
- [Instruction set](https://www.ctfrecipes.com/pwn/architectures/aarch32/instruction-set.md)
- [Calling convention](https://www.ctfrecipes.com/pwn/architectures/aarch32/calling-convention.md)
- [aarch64](https://www.ctfrecipes.com/pwn/architectures/aarch64.md)
- [Registers](https://www.ctfrecipes.com/pwn/architectures/aarch64/registers.md)
- [Instruction set](https://www.ctfrecipes.com/pwn/architectures/aarch64/instruction-set.md)
- [Calling convention](https://www.ctfrecipes.com/pwn/architectures/aarch64/calling-convention.md)
- [mips32](https://www.ctfrecipes.com/pwn/architectures/mips32.md)
- [Registers](https://www.ctfrecipes.com/pwn/architectures/mips32/registers.md)
- [Instruction set](https://www.ctfrecipes.com/pwn/architectures/mips32/instruction-set.md)
- [Calling convention](https://www.ctfrecipes.com/pwn/architectures/mips32/calling-convention.md)
- [mips64](https://www.ctfrecipes.com/pwn/architectures/mips64.md)
- [Registers](https://www.ctfrecipes.com/pwn/architectures/mips64/registers.md)
- [Instruction set](https://www.ctfrecipes.com/pwn/architectures/mips64/instruction-set.md)
- [Calling convention](https://www.ctfrecipes.com/pwn/architectures/mips64/calling-convention.md)
- [x86 / x64](https://www.ctfrecipes.com/pwn/architectures/x86-x64.md)
- [Registers](https://www.ctfrecipes.com/pwn/architectures/x86-x64/registers.md): Main x86 and x64 registers
- [Instruction set](https://www.ctfrecipes.com/pwn/architectures/x86-x64/instruction-set.md)
- [Calling convention](https://www.ctfrecipes.com/pwn/architectures/x86-x64/calling-convention.md)
- [Stack exploitation](https://www.ctfrecipes.com/pwn/stack-exploitation.md)
- [Stack Buffer Overflow](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow.md)
- [Dangerous functions](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/dangerous-functions.md)
- [gets](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/dangerous-functions/gets.md)
- [memcpy](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/dangerous-functions/memcpy.md)
- [sprintf](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/dangerous-functions/sprintf.md)
- [strcat](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/dangerous-functions/strcat.md)
- [strcpy](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/dangerous-functions/strcpy.md)
- [Basics](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/basics.md): Data overwrite
- [Challenge example](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/basics/challenge-example.md)
- [Instruction pointer Overwrite](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/instruction-pointer-overwrite.md): Arbitrary Instruction redirection
- [Challenge example](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/instruction-pointer-overwrite/challenge-example.md)
- [De Bruijn Sequences](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/de-bruijn-sequences.md): "Calculating" offset
- [Stack reading](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/stack-reading.md): Bruteforce as stack reader
- [Challenge example](https://www.ctfrecipes.com/pwn/stack-exploitation/stack-buffer-overflow/stack-reading/challenge-example.md)
- [Format string](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string.md)
- [Dangerous functions](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/dangerous-functions.md)
- [printf](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/dangerous-functions/printf.md)
- [fprintf](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/dangerous-functions/fprintf.md)
- [Placeholder](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/specifier.md)
- [Data Leak](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/data-leak.md)
- [Challenge example](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/data-leak/challenge-example.md)
- [Data modification](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/data-modification.md)
- [Challenge example](https://www.ctfrecipes.com/pwn/stack-exploitation/format-string/data-modification/data-modification.md)
- [Arbitrary code execution](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution.md)
- [Shellcode](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/arbitrary-code-execution.md)
- [ret2reg](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/ret2reg.md): Using register
- [Code reuse attack](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack.md)
- [Ret2plt](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/ret2plt.md): ASLR bypass
- [Ret2dlresolve](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/ret2dlresolve.md): Resolving an arbitrary libc functions
- [GOT Overwrite](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/got-overwrite.md)
- [Ret2LibC](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/ret2libc.md)
- [Leaking LibC](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/leaking-libc.md): ASLR bypass
- [Ret2csu](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/ret2csu.md): Controlling registers
- [Return Oriented Programming - ROP](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/return-oriented-programming-rop.md)
- [Sigreturn Oriented Programming - SROP](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/sigreturn-oriented-programming-srop.md): A syscall to rule them all
- [Blind Return Oriented Programming - BROP](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/blind-return-oriented-programming-brop.md)
- [Challenge example](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/blind-return-oriented-programming-brop/challenge-example.md)
- [Call Oriented Programming - COP](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/call-oriented-programming-cop.md)
- [Jump Oriented Programming - JOP](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/jump-oriented-programming-jop.md)
- [One gadget](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/code-reuse-attack/one-gadget.md): Quick win
- [Stack pivoting](https://www.ctfrecipes.com/pwn/stack-exploitation/arbitrary-code-execution/stack-pivoting.md): ROP with a small buffer
- [Heap exploitation](https://www.ctfrecipes.com/pwn/heap-exploitation.md)
- [Heap overflow](https://www.ctfrecipes.com/pwn/heap-exploitation/heap-overflow.md)
- [Challenge example](https://www.ctfrecipes.com/pwn/heap-exploitation/heap-overflow/challenge-example.md)
- [Use after free](https://www.ctfrecipes.com/pwn/heap-exploitation/use-after-free.md)
- [Challenge example](https://www.ctfrecipes.com/pwn/heap-exploitation/use-after-free/challenge-example.md)
- [Double free](https://www.ctfrecipes.com/pwn/heap-exploitation/double-free.md): Arbitrary write
- [Unlink exploit](https://www.ctfrecipes.com/pwn/heap-exploitation/unlink-exploit.md)
- [Protections](https://www.ctfrecipes.com/pwn/protections.md)
- [Stack Canaries](https://www.ctfrecipes.com/pwn/protections/stack-canaries.md): Buffer Overflow prevention
- [No eXecute](https://www.ctfrecipes.com/pwn/protections/no-execute.md): The shellcode prevention
- [PIE](https://www.ctfrecipes.com/pwn/protections/pie.md): Position Independent Executable
- [ASLR](https://www.ctfrecipes.com/pwn/protections/aslr.md): Address Space Layout Randomisation
- [RELRO](https://www.ctfrecipes.com/pwn/protections/relro.md): Relocation Read-Only
- [Integer overflow](https://www.ctfrecipes.com/pwn/integer-overflow.md)


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