sm4 | SM4 by JavaScript - SM4 是传统的对称加密算法, 采用分组加密,类似于 DES 或 AES。

 by   windard JavaScript Version: Current License: No License

kandi X-RAY | sm4 Summary

kandi X-RAY | sm4 Summary

sm4 is a JavaScript library. sm4 has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

SM4 是传统的对称加密算法, 采用分组加密,类似于 DES 或 AES。. 网上已有 JavaScript 实现的 SM2 算法,其参考引用了很多 jsrsasign 的实现,这是一个用 JavaScript 做加密解密的库,实现了很多的加密解密算法。. JavaScript 本身是有很多缺陷的,数字只有 int 类型,虽然说是 64 位的,但是在做移位运算的时候它会被自动转换为 32 位,这就很尴尬,32 位的移位运算,一不小心就越界了,而且移位也只有左移,而没有循环移位。虽然说 Python 也是只有 int 型,不过它是真真的64 位,不会缺斤少两,网上也有文章详细的提到 JavaScript 的移位操作的缺陷。. JavaScript 没有循环左移,只有左移,右移和无符号位右移。JavaScript 的复数的值等于 - (值的逆 + 1),比如说 -977410425 的二进制表示为 11000101101111011110011010000111 ,它的逆为 00111010010000100001100101111000 ,它的值的逆加1为 00111010010000100001100101111001 ,所以在 JavaScript 中就会表示为 -111010010000100001100101111001,即 x = -(~x + 1). 关于 SM4 算法流程,国家密码局是已经公开了的,可以找到一份 PDF 文档,写的清清楚楚,明明白白,比我想象的要简单一些,这里就展示一下我自己实现的 循环左移 之类的函数,为什么一直在提循环左移呢?肯定是因为算法里面会用到的吖。. 或许也是因为这些不优雅的代码,使得代码的执行效率不高,或者说非常低,在官方文档中提供了一个 1000000 遍的加密样例,然而我的 JavaScript 10000 遍就需要近一分钟,Python 10000 遍近 10 秒,这样下来就需要一个多小时了,可是网上找到的 C语言 和 Java 实现的 SM4 对 1000000 遍加密只需要近一秒钟即可,或许跟代码质量也有关吧,但还是可怕的性能差异。.
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            kandi-support Support

              sm4 has a low active ecosystem.
              It has 109 star(s) with 51 fork(s). There are 9 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 2 open issues and 3 have been closed. On average issues are closed in 51 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of sm4 is current.

            kandi-Quality Quality

              sm4 has 0 bugs and 0 code smells.

            kandi-Security Security

              sm4 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              sm4 code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              sm4 does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              sm4 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.
              sm4 saves you 564 person hours of effort in developing the same functionality from scratch.
              It has 1319 lines of code, 21 functions and 71 files.
              It has high 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 sm4
            Get all kandi verified functions for this library.

            sm4 Key Features

            No Key Features are available at this moment for sm4.

            sm4 Examples and Code Snippets

            No Code Snippets are available at this moment for sm4.

            Community Discussions

            QUESTION

            Fail to display data to the frontend from api endpoint
            Asked 2021-May-23 at 13:32

            I am learning vuejs as frontend and nodejs as backend, I have created a backend point api which work fine as i can display array of objects of data to a browser also from the postman, I created frontend service that will take data from backend api, there after I exported and imported to my component where i need to display the data but no error and no data is displayed. I have attached my backend code, frontend service.js that consume backend api and my vuejs component for viewing data

            backend code

            ...

            ANSWER

            Answered 2021-May-22 at 05:09

            You're not calling the created function that's why it's not working here!

            Script tag:

            Source https://stackoverflow.com/questions/67646277

            QUESTION

            How can I reformat the look/ format of an input dialog box in pine.script?
            Asked 2021-Apr-04 at 04:48

            I coded this looong study in pine and it gave me this dialog box with lots to scroll down to get to everything (see pic). I was wondering if there is a way to set up code so these individual input modules (1-4...) can be next to each other (Fig. II), rather than all below each other (Fig. I) ... creating this looooong scroll box? Every bit of help is much appreciated. Thx Y’all

            [The input dialog box i’d like to reformat with code][1]

            ...

            ANSWER

            Answered 2021-Mar-31 at 11:37

            It's not possible to group inputs in the way you show on your screenshot at the moment. That being said, Pine v4 has some functionality related to grouping inputs. If your indicator is not yet written in v4, you'd need to update it to v4. After that, adding a group argument to your inputs will group them together in a "block" of inputs with the group as their title. Adding the inline argument will display all the inputs with the same inline in one line. So you can have something like this:

            Source https://stackoverflow.com/questions/66879979

            QUESTION

            add ingredient to shopping List
            Asked 2020-Oct-26 at 10:21

            I have a project to add an ingredient in a recipe to "Shopping List". And in this picture there are several ingredients at the bottom "sugar". When I click on the plus sign I want to add the ingredient to the "shopping List". How can I solve this problem?

            In this file, you create an ingredient with this ingredient's data such as its name and quantity. CreateIngredient:

            ...

            ANSWER

            Answered 2020-Oct-26 at 10:21

            You can put a on click observer un your button, define a function that would execute in such case and pass it the object you want to store like so:

            Source https://stackoverflow.com/questions/64483219

            QUESTION

            Display Recipes in the Page
            Asked 2020-Oct-25 at 20:12

            This is a project in order to display recipes and perform many operations on these recipes such as adding, deleting and modifying, but here I want to display the recipes and to view the recipes I wrote the following code, but the recipes were never displayed in the browser. How can I solve this problem?

            This file is for viewing recipes. Recipes.vue:

            ...

            ANSWER

            Answered 2020-Oct-25 at 20:12

            First thing I can see is that it should be this.$store.state.loadedRecipes instead of this.$store.dispatch("loadedRecipes") when you load the elements from the store.

            I also think you might be missing store inside the Vue instance and or the creation of the actual store. The store should be imported like this in app.js, main.js or index.js like so:

            Source https://stackoverflow.com/questions/64511011

            QUESTION

            Recipe data modification
            Asked 2020-Oct-22 at 20:42

            This is a project to display food recipes, and several operations can be performed on the recipe, such as modifying the recipe, deleting a recipe, adding a recipe, but when modifying a recipe, I modify the data and press the Save button (as in the picture), but the modifications are not saved and I do not know why. How can i solve the problem?

            This is the form for modifying a recipe and from here the new data is passed to the recipe. EditRecipesDetails:

            ...

            ANSWER

            Answered 2020-Oct-22 at 20:42

            QUESTION

            delete item from local storage and VueX
            Asked 2020-Oct-16 at 14:44

            In the beginning, I created a recipe and stored the recipe using Local Storage and VueX by adding the recipe to the Matrix "State" This project is to display a set of recipes with the ability to delete a recipe. As shown in the picture. How can I delete a recipe from LOCAL STORAGE and VueX?

            store.js:

            ...

            ANSWER

            Answered 2020-Oct-16 at 14:44

            QUESTION

            Reuse existing tab in VueJS for routing to child and grandchild routes with Vue Router
            Asked 2020-Sep-18 at 11:48

            I have a VueJS application where I want to reuse the current tab when routing to grand-child routes. The child component is what is defined as the initial path for the tab and I want to remain on that tab when I route to the GrandChild route. Currently, when I use Router-link to redirect, it paints the tab as the active tab but displays the child component instead of the grandchild. My router view includes the tabs as well as a header object. How could I setup a router-link to redirect to the grandchild component?

            routes.js

            ...

            ANSWER

            Answered 2020-Sep-18 at 11:48

            I think you have a pretty straight forward issue - you are nesting twice.

            Option 1

            You'd need another inside the child component to be able to see the grandchild with the current route configuration (and then hide the child content with v-show or something like that)

            Option 2

            Alternatively you could change the way you structure the child and grandchild routes, don't nest them:

            Source https://stackoverflow.com/questions/63955028

            QUESTION

            How to generate training samples for LSTM?
            Asked 2020-Aug-16 at 16:44

            I have 100 invidual time series (units - index) within the dataframe below and want to train LSTM to predict the target ('RUL').

            My data look like:

            ...

            ANSWER

            Answered 2020-Aug-16 at 16:44

            The model waits for and input (x) array/sequence with length of 18 (input_shape=(18,1)). But it gets one with length of 5. You shoud change the parameters of TimeseriesGenerator to length=18 and sampeling_rate=1 maybe, to generate imputs with length of 18.

            Source https://stackoverflow.com/questions/63438960

            QUESTION

            How to scale all data within a dataframe but one columns
            Asked 2020-Aug-15 at 11:49

            My data look like:

            ...

            ANSWER

            Answered 2020-Aug-15 at 11:49

            You can select all columns without first by DataFrame.iloc, here first : means all rows and 1: all columns without first and pass to fit_transform:

            Source https://stackoverflow.com/questions/63425689

            QUESTION

            Change vuetify v-chip color dynamically
            Asked 2020-Jul-05 at 07:59

            I am new to vuejs and vuetify.

            I was following youtube course on vuetify and he set the v-chip color in the following manner.

            ...

            ANSWER

            Answered 2020-Jul-05 at 07:59

            You can use the :class binding directly with the data prop in vue; it can also be used in conjunction with the regular class attribute.

            Source https://stackoverflow.com/questions/62736868

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

            Vulnerabilities

            No vulnerabilities reported

            Install sm4

            You can download it from GitHub.

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