cryptopals | Hacking cryptography in Ruby , using Cryptopals techniques | Cryptography library

 by   yoeo Ruby Version: Current License: GPL-3.0

kandi X-RAY | cryptopals Summary

kandi X-RAY | cryptopals Summary

cryptopals is a Ruby library typically used in Security, Cryptography applications. cryptopals has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitLab, GitHub.

This project demonstrates attacks on state-of-the-art Cryptography implementations, including AES, RSA, SHA-1, random number generators and much more...
Support
    Quality
      Security
        License
          Reuse

            kandi-support Support

              cryptopals has a low active ecosystem.
              It has 5 star(s) with 0 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              cryptopals has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of cryptopals is current.

            kandi-Quality Quality

              cryptopals has 0 bugs and 0 code smells.

            kandi-Security Security

              cryptopals has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              cryptopals code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              cryptopals is licensed under the GPL-3.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              cryptopals releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.
              It has 2609 lines of code, 321 functions and 40 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed cryptopals and discovered the below as its top functions. This is intended to give you an instant insight into cryptopals implemented functionality, and help decide if they suit your requirements.
            • Copies the number of random numbers .
            • Equivalent to two integers
            • This method is used by calculating the bounds of a point .
            • strip padding
            • Delegate state to state
            • Verifies the signature of the blob .
            • Add text to the given text .
            • Returns the public key for a public key
            • divide two units
            Get all kandi verified functions for this library.

            cryptopals Key Features

            No Key Features are available at this moment for cryptopals.

            cryptopals Examples and Code Snippets

            No Code Snippets are available at this moment for cryptopals.

            Community Discussions

            QUESTION

            Why do my RSA values for p, q, e = 3 result in unsuccessful decryption?
            Asked 2022-Jan-05 at 23:50

            I'm actually trying to solve cryptopals set 5 challenge 39. I'm trying to implement RSA for some larger primes p and q, e = 3. I've been puzzled over this for hours.

            To generate primes, I'm hitting an API to get each prime. I keep generating p until gcd(p - 1, e) == 1, and then repeat for q until gcd(q - 1, e) == 1. I've tested for gcd((p - 1) * (q - 1), e) == 1, too. For example, I end up with p == 16226322033026808497, and q == 14712923008023747557.

            I then do the simple RSA math to calculate the other terms, encrypt message 42 (no padding), decrypt that cipher, and compare the resulting plain to the original message. I've generated many, many ps and qs, and it never matches.

            Can someone explain why this doesn't work, and help me generate some good parameters, please?

            Python:

            ...

            ANSWER

            Answered 2022-Jan-05 at 23:50

            The API that I used to generate primes was in fact giving composites, which prevents meaningful decryption. Generating with a more reliable source, I find p == 18015945217661527751, q == 11788823512629961979, for example, which are actually prime. And I can now successfully decrypt back to the original message.

            I've found that https://asecuritysite.com/encryption/random3 gives some reasonable primes.

            Source https://stackoverflow.com/questions/70593150

            QUESTION

            Crypto-JS can't decode AES string from cryptopals challenge
            Asked 2021-Oct-21 at 17:10

            I'm trying to decode this AES string: https://cryptopals.com/static/challenge-data/7.txt (from here)

            The page simply says it's been AES encrypted in ECB mode using the key YELLOW SUBMARINE.

            The Crypto-JS library should be able to decode this. The docs show a simple method, and I'm using it like so:

            ...

            ANSWER

            Answered 2021-Oct-21 at 17:10

            The key must be passed to decrypt() as WordArray. This can be achieved with the Utf8 encoder.

            The ciphertext can be passed directly as Base64 encoded string and is implicitly converted to a CipherParams object by CryptoJS.

            This allows the ciphertext to be decrypted:

            Source https://stackoverflow.com/questions/69665697

            QUESTION

            Why does python convert my bytes-object into a int, when I put them in a new list?
            Asked 2021-Aug-26 at 14:18

            Intro

            Hi, I'm doing some fun cryptoanalysis exercises from cryptopals, and I have now encountered an 'issue', that also has happened earlier, and I really don't understand.

            currently, I have a ciphertext that I read from a file in the following way:

            ...

            ANSWER

            Answered 2021-Aug-26 at 14:18

            Ah, I remember this problem in cryptopals, I was facepalming when I understood how this trick works.

            As MisterMiyagi said it, bytes is not a sequence of "bytes", but a sequence of ints.

            If you index into an str, you get another str:

            Source https://stackoverflow.com/questions/68940123

            QUESTION

            python xor renders only zero?
            Asked 2021-Jul-06 at 19:04

            im trying to implement a repeating key xor encryption scheme in python.

            I have this implementation:

            ...

            ANSWER

            Answered 2021-Jul-06 at 19:01

            As I mentioned in a comment, bytes(n) doesn't convert n to a byte, it creates a bytes object with n zeros. I'm sure the xor is working fine. Instead of:

            Source https://stackoverflow.com/questions/68275891

            QUESTION

            Base64 implementation is not giving the desired result
            Asked 2021-Feb-25 at 03:32

            I've followed the following site instructions in order to implement base64 encoding.

            Here's my code:

            ...

            ANSWER

            Answered 2021-Feb-25 at 03:32

            According to the site, the task is to convert the hex to base64.

            Your encoding, seems to be working correctly as the library base64 outputs the same as your result when running it directly over the hex value

            Source https://stackoverflow.com/questions/66361855

            QUESTION

            Pycrypto: "Double encrypting" with AES on ECB mode does not yield plaintext
            Asked 2020-Sep-01 at 02:23

            This is a part of cryptopals challenges (cryptopals.org)

            Following code performs the "encrypt" operation on the ciphertext obtained from the previous round:

            ...

            ANSWER

            Answered 2020-Aug-31 at 07:25

            Shouldn't it be in your code assert testbytes == plaintext to test your hypothesis?

            Anyway. An encryption consists of two parts, the algorithm (here AES) and the mode of operation (here ECB). The algorithm itself can only encrypt a single block. The mode of operation extends this to plaintexts of any length. So that your assumption is correct, the individual processing steps and their order for decryption and encryption must be identical for both parts, algorithm and mode of operation.

            Concerning the ECB mode your assumption is true, because each block is processed independently from the other (which also makes this mode insecure). However, for AES your assumption is not true, since decryption is essentially done in the reverse order to encryption, for details see here.

            The easiest way to check the latter is to encrypt only one block without padding. Since the ECB mode does not use an IV, the encryption is reduced to the AES primitive itself. Padding does not have to be disabled, because PyCryptodome does not implicitly pad (in contrast to many other libraries). This case just corresponds to your code (although you have to check the equality between testbytes and plaintext). The result verifies that a double encryption using AES does not result in the original plaintext.

            Source https://stackoverflow.com/questions/63664854

            QUESTION

            Why does indexing bytes in Python 3 return an int instead of bytes?
            Asked 2020-May-11 at 17:42

            Trying to understand why taking the index of a bytes object returns an int that you can't decode, but a slice returns a bytes object that you can. This seems un-intuitive. When you do the same operation with a string, taking an index at the string position still returns a string.

            Working on the Cryptopals challenges, I'm trying to iterate over a byte array to do frequency analysis of an XORed string to count the occurrence of the number of plain text letters. I thought I could do the following, but I'm getting 'int' object has not attribute 'decode' error. From reading the Python docs, that makes sense, a byte array is a mutable sequence of integers, but when testing in the interpreter I was expecting different behavior.

            ...

            ANSWER

            Answered 2020-May-10 at 00:31

            As you've found out the bytes iterator generates integers not characters. You need to use chr to convert the int value to an str value.

            Source https://stackoverflow.com/questions/61705338

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install cryptopals

            You can download it from GitLab, GitHub.
            On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
            CLONE
          • HTTPS

            https://github.com/yoeo/cryptopals.git

          • CLI

            gh repo clone yoeo/cryptopals

          • sshUrl

            git@github.com:yoeo/cryptopals.git

          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Explore Related Topics

            Consider Popular Cryptography Libraries

            dogecoin

            by dogecoin

            tink

            by google

            crypto-js

            by brix

            Ciphey

            by Ciphey

            libsodium

            by jedisct1

            Try Top Libraries by yoeo

            guesslang

            by yoeoPython

            chameledit

            by yoeoJavaScript

            mod

            by yoeoPython

            pasta

            by yoeoPython

            pyhow

            by yoeoPython