ECTester | Tests support and behavior of elliptic curve cryptography | Cryptography library

 by   crocs-muni Java Version: 0.3.3 License: MIT

kandi X-RAY | ECTester Summary

kandi X-RAY | ECTester Summary

ECTester is a Java library typically used in Security, Cryptography applications. ECTester has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

ECTester is a tool for testing and analysis of elliptic curve cryptography implementations on JavaCards and in cryptographic libraries. It consists of four separate parts:. For more information on ECC support on JavaCards see the github page, with results, tables and docs. This project is developed by the Centre for Research On Cryptography and Security at Faculty of Informatics, Masaryk University.
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            kandi-support Support

              ECTester has a low active ecosystem.
              It has 32 star(s) with 10 fork(s). There are 6 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              ECTester has no issues reported. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of ECTester is 0.3.3

            kandi-Quality Quality

              ECTester has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              ECTester is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              ECTester releases are available to install and integrate.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.
              ECTester saves you 10776 person hours of effort in developing the same functionality from scratch.
              It has 21865 lines of code, 1130 functions and 208 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of ECTester
            Get all kandi verified functions for this library.

            ECTester Key Features

            No Key Features are available at this moment for ECTester.

            ECTester Examples and Code Snippets

            No Code Snippets are available at this moment for ECTester.

            Community Discussions

            QUESTION

            ECSDA sign with Python, verify with JS
            Asked 2022-Apr-10 at 18:16

            I'm trying to achieve the exact opposite of this here where I need to sign a payload in Python using ECDSA and be able to verify the signature in JS.

            Here is my attempt, but I'm pretty sure I'm missing something with data transformation on either or both ends.

            (Key types are the same as in the answer provided to the question above)

            I've tried some other variations but nothing worked so far.

            (The verification on JS returns False)

            Python:

            ...

            ANSWER

            Answered 2022-Apr-10 at 18:16

            The main problem is that both codes use different signature formats:
            sign_payload() in the Python code generates an ECDSA signature in ASN.1/DER format. The WebCrypto API on the other hand can only handle the IEEE P1363 format.
            Since the Python Cryptography library is much more convenient than the low level WebCrypto API it makes sense to do the conversion in Python code.

            The following Python code is based on your code, but additionally performs the transformation into the IEEE P1363 format at the end:

            Source https://stackoverflow.com/questions/71818496

            QUESTION

            How to calculate sha 512 hash properly in .NET 6
            Asked 2022-Mar-30 at 04:56

            In .NET 6 code from How can I SHA512 a string in C#?

            ...

            ANSWER

            Answered 2021-Nov-27 at 16:16

            In my case I was using RNGCryptoServiceProvider in .NET 5 but when I updated to .NET 6 I got the same warning. After reading about it in this issue I changed my code from this:

            Source https://stackoverflow.com/questions/70109573

            QUESTION

            Crypto-js encryption and Python decryption using HKDF key
            Asked 2022-Mar-28 at 11:29

            Based on the example provided here on how to establish a shared secret and derived key between JS (Crypto-JS) and Python, I can end up with the same shared secret and derived key on both ends.

            However, when I try to encrypt as below, I cannot find a way to properly decrypt from Python. My understanding is that probably I am messing with the padding or salts and hashes.

            ...

            ANSWER

            Answered 2022-Mar-28 at 11:29

            The issue is that the key is not passed correctly in the CryptoJS code.

            The posted Python code generates LefjQ2pEXmiy/nNZvEJ43i8hJuaAnzbA1Cbn1hOuAgA= as Base64-encoded key. This must be imported in the CryptoJS code using the Base64 encoder:

            Source https://stackoverflow.com/questions/71632056

            QUESTION

            Exception "System.Security.Cryptography.CryptographicException" after Publishing project
            Asked 2022-Mar-19 at 05:01

            Everytime I publish my Blazor Server-project to my website domain, and opening the website, this exception occurs, and there's little to no help Googling it:

            And it says AppState.cs: line 21, so here's the codeline for it:

            This exception is not happening under debugging localhost. When I delete localStorage from the browser on my website, and refreshing, then everything works. But I don't want my customers having this exception and having to tell them to delete the localstorage everytime I'm publishing.

            My Program.cs if necessary:

            ...

            ANSWER

            Answered 2022-Mar-16 at 13:16

            Try to set Load User Profile to true in your IIS app pool in the advanced settings. see this answer, I hope that will help you!

            Source https://stackoverflow.com/questions/71494715

            QUESTION

            Chaum blind signature with blinding in JavaScript and verifying in Java
            Asked 2022-Mar-04 at 16:01

            I'm experimenting with Chaum's blind signature, and what I'm trying to do is have the blinding and un-blinding done in JavaScript, and signing and verifying in Java (with bouncy castle). For the Java side, my source is this, and for JavaScript, I found blind-signatures. I've created two small codes to play with, for the Java side:

            ...

            ANSWER

            Answered 2021-Dec-13 at 14:56

            The blind-signature library used in the NodeJS code for blind signing implements the process described here:

            No padding takes place in this process.

            In the Java code, the implementation of signing the blind message in signConcealedMessage() is functionally identical to BlindSignature.sign().
            In contrast, the verification in the Java code is incompatible with the above process because the Java code uses PSS as padding during verification.
            A compatible Java code would be for instance:

            Source https://stackoverflow.com/questions/70324926

            QUESTION

            KJUR jws jsrsasign: Cannot validate ES256 token on JWT.io
            Asked 2022-Mar-03 at 06:41

            We are trying to make a JWT token for Apple Search Ads using the KJUR jws library. We are using the API documents from Apple:

            https://developer.apple.com/documentation/apple_search_ads/implementing_oauth_for_the_apple_search_ads_api

            We are generating a private key (prime256v1 curve):

            openssl ecparam -genkey -name prime256v1 -noout -out private-key.pem

            Next we are generating a public key from the private key:

            openssl ec -in private-key.pem -pubout -out public-key.pem

            Next we setup the header and payload:

            ...

            ANSWER

            Answered 2022-Mar-02 at 07:47

            The issue is caused by an incorrect import of the key.

            The posted key is a PEM encoded private key in SEC1 format. In getKey() the key is passed in JWK format, specifying the raw private key d. The PEM encoded SEC1 key is used as the value for d. This is incorrect because the raw private key is not identical to the SEC1 key, but is merely contained within it.

            To fix the problem, the key must be imported correctly. jsrsasign also supports the import of a PEM encoded key in SEC1 format, but then it also needs the EC parameters, s. e.g. here. For prime256v1 aka secp256r1 this is:

            Source https://stackoverflow.com/questions/71307444

            QUESTION

            Is it possible to get ISO9796-2 signature with Trailer = 'BC' in Javacard?
            Asked 2022-Feb-24 at 10:46

            I trying to get the RSA signature as described in Annex A2.1 of EMV book 2. As I understand it was described in ISO9796-2 as scheme 1, option 1. So, the resulting signature should contain a Header equal to '6A' and a Trailer equal to 'BC'.

            The algorithms ALG_RSA_SHA_ISO9796 and ALG_RSA_SHA_ISO9796_MR are the only suitable that I could find. But they acting like scheme 1, option 2 with a Trailer equal to '33cc'

            Is it possible to get a signature with Trailer = 'BC'?

            Javacard example code:

            ...

            ANSWER

            Answered 2022-Feb-24 at 10:46

            You can generate such signature using Cipher.ALG_RSA_NOPAD in decrypt mode.

            Pseudocode:

            Source https://stackoverflow.com/questions/71243483

            QUESTION

            How to transfer custom SPL token by '@solana/web3.js' and '@solana/sol-wallet-adapter'
            Asked 2022-Jan-29 at 21:02

            Hello I am trying to transfer a custom SPL token with the solana-wallet adapter. However i am having trouble getting the wallet's secret key/signing the transaction.

            I've looked at these answers for writing the transfer code but i need to get the Singer and i have trouble figuring out how with solana-wallet adapter. These examples hardcode the secret key and since i'm using a wallet extension this is not possible.

            How can you transfer SOL using the web3.js sdk for Solana?

            How to transfer custom token by '@solana/web3.js'

            according to this issue on the webadapter repo https://github.com/solana-labs/wallet-adapter/issues/120 you need to:

            1. Create a @solana/web3.js Transaction object and add instructions to it
            2. Sign the transaction with the wallet
            3. Send the transaction over a Connection

            But i am having difficulty finding examples or documentation as to how to do step 1 and 2.

            ...

            ANSWER

            Answered 2021-Dec-06 at 13:51

            So i found a way to do this, it requires some cleanup and error handling but allows for a custom token transaction via @solana/wallet-adapter.

            Source https://stackoverflow.com/questions/70224185

            QUESTION

            From base64-encoded public key in DER format to COSE key, in Python
            Asked 2022-Jan-01 at 10:34

            I have a base64-encoded public key in DER format. In Python, how can I convert it into a COSE key?

            Here is my failed attempt:

            ...

            ANSWER

            Answered 2022-Jan-01 at 07:49

            The posted key is an EC key for curve P-256 in X.509 format.

            With an ASN.1 parser (e.g. https://lapo.it/asn1js/) the x and y coordinates can be determined:

            Source https://stackoverflow.com/questions/70542577

            QUESTION

            Why are signatures created with ecdsa Python library not valid with coincurve?
            Asked 2021-Dec-25 at 14:41

            I'm switching from the pure Python ecdsa library to the much faster coincurve library for signing data. I would also like to switch to coincurve for verifying the signatures (including the old signatures created by the ecdsa library).

            It appears that signatures created with ecdsa are not (always?) valid in coincurve. Could someone please explain why this is not working? Also, it seems that cryptography library is able to validate both ecdsa signatures and coincurve signatures without issues, consistently.

            What is even more confusing, if you run below script a few times, is that sometimes it prints point 3 and other times it does not. Why would coincurve only occasionally find the signature valid?

            ...

            ANSWER

            Answered 2021-Dec-25 at 14:41

            Bitcoin and the coincurve library use canonical signatures while this is not true for the ecdsa library.

            What does canonical signature mean?
            In general, if (r,s) is a valid signature, then (r,s') := (r,-s mod n) is also a valid signature (n is the order of the base point).
            A canonical signature uses the value s' = -s mod n = n - s instead of s, i.e. the signature (r, n-s), if s > n/2, s. e.g. here.

            All signatures from the ecdsa library that were not been successfully validated by the coincurve library in your test program have an s > n/2 and thus are not canonical, whereas those that were successfully validated are canonical.

            So the fix is simply to canonize the signature of the ecdsa library, e.g.:

            Source https://stackoverflow.com/questions/70477905

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

            Vulnerabilities

            No vulnerabilities reported

            Install ECTester

            ECTester uses Java 8 and ant. There are three parts of ECTester, the JavaCard applet used for testing, the reader app which controls it and the standalone app which tests software libraries. The target platform for ECTester is Linux, but things should work on Windows as well, although testing of standalone libraries will be limited to Java libraries and Microsoft CNG library.
            Simply doing ant -f build-standalone.xml package should build everything necessary to teste libraries via the standalone app, the sections below describe the details of how that works and what needs to be done if it doesn't. To see whether your build was sucessful, go to the dist directory, run: java -jar ECTesterStandalone.jar list-libs and observe if your target libraries are included in the output. If they are not, and they are native libraries, it means that either the shim library was not built successfully or that the actual native library couldn't be found and loaded on runtime. To solve the former, look for build errors during the ant run in the libs-try step, for the latter, if the library is in an non-standard location specifying LD_LIBRARY_PATH will help load it. Consulting the next sections should help solve both. ECTester interfaces with native libraries by using custom shim libraries that expose the functionality via the Java Native Interface, these can be found in the src/cz/crcs/ectester/standalone/libs/jni directory along with a Makefile (Makefile.bat for Windows). The shim library will depend on the native library, and have a name like boringssl_provider.so, botan_provider.so, cryptopp_provider.so and openssl_provider.so. The Makefile has a target for every library that it supports that builds its shim, see the help target for more info. The Makefile is automatically ran when the build-standalone.xml ant build is triggered, so if all is setup correctly, you do not need to deal with the Makefile while building. There are two important environmental variables that should be set in your environment. First, you should set JAVA_HOME which should point to your JDK. The tooling uses JAVA_HOME to locate native Java library headers, like jni.h. Second, ECTester uses pkg-config to locate the native libraries, if your pkg-config files are in an unusual place the pkg-config command would not find them by default, you should set PKG_CONFIG_PATH to the directory containing the *.pc files. If pkg-config files are unavailable for the library you are trying to test, you will need to change the Makefile manually to apply the correct options to the commands (CFLAGS, include options, linker options...).
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            TESTS: Description of card test suites.CURVES: Description of curve and test data contained in ECTester.FORMAT: Description of input and output formats used by ECTester.LIBS: List of cryptographic libraries supported by ECTester and their characteristics.VULNS: List of vulnerabilities discovered using ECTester.
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