BaseCracker

BaseCracker is a tool to encode, decode and crack encoded data. It can be really useful to crack some random encoded strings in CTFs.

Installation

You can build and install it from source using cargo:

cargo install basecracker

Current supported encodings

• base2 / binary (padding by 7, 8, 9, 10)
• base10 / decimal
• base16 / hexadecimal
• base32
• base36
• base58
• base62
• base64
• base85

Options

basecracker 0.1.0
Encode, decode and crack encoded data

USAGE:
    basecracker [OPTIONS]

OPTIONS:
    -b, --bases <BASES>...      Set base to use (can be separated by comma or space)
    -c, --crack <CIPHER>        Crack the cipher/file using the specified bases (default: all)
    -d, --decode <CIPHER>       Decode given cipher/file using the specified bases
    -e, --encode <PLAINTEXT>    Encode given plaintext/file using the specified bases
    -h, --help                  Print help information
    -j, --json                  Output cracker results in json format
    -l, --list                  List supported bases
    -q, --quiet                 Quiet mode, don't print anything except results
    -r, --reversed              Reverse bases order (default: false)
    -v, --verbose               Verbose mode, print encoding/decoding steps
    -V, --version               Print version information

Example

$ basecracker -e "Awsome CTF tool" -b b64,b85,hex,b32,b62,b58
2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj
$ basecracker -d 2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj -b b64,b85,hex,b32,b62,b58 -r
Awsome CTF tool
$ basecracker -c 2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj
Recipe: base58 -> base62 -> base32 -> hex -> base85 -> base64
Result: Awsome CTF tool

JSON output

BaseCracker can output results in JSON format. This is useful for other tools that can parse JSON output.

$ basecracker -c 2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj -j | jq
{
  "cipher": "2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj",
  "plaintexts": [
    {
      "bases": [
        "base58",
        "base62",
        "base32",
        "hex",
        "base85",
        "base64"
      ],
      "plaintext": "Awsome CTF tool"
    }
  ]
}

Verbose mode

Useful if you want to see the steps of encoding/decoding.

$ basecracker -d 2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj -b b64,b85,hex,b32,b62,b58 -r -v
Cipher: 2SYnX25ZB1torUZ1AmsobB58ESDjzHzb2dJTZuwt22KfynQP1eRjxPoumGWiA45iGpRw2sx5LVB1D8K8xaLTTetafmPs3a44oiaFxrg3s4d4fkWJ36UzrSFWuLL6WbdQ5nbQSBCV7gC2DCzrxpaj

Applying base58:    24zWWqnLNTkqrJLFhyjKgOLhOVogWn56yCpBh7iHx8gU5QIcIwP4HuxlqkbBy7ccozgSHPut9d04qUU2erRetVaJE8bkM0XiKqQBWGaM96NH
Applying base62:    GNRDEZBTG42DANJUGQYDKMBVGQ2WCNJTGM4DIZRVME2DENJTGNRDIYJUGE2DQNDGGQYDKMBVGQ3TENRS
Applying base32:    3b2d3740544050545a53384f5a42533b4a41484f4050547262
Applying hex:       ;-7@T@PTZS8OZBS;JAHO@PTrb
Applying base85:    QXdzb21lIENURiB0b29s
Applying base64:    Awsome CTF tool

Plaintext: Awsome CTF tool

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.