Contents
SHA256 Encoding
Here is How to Generate SHA256 Encoded Hash from any Input Value in React Native. We will use the sha256
component from react-native-sha256
to convert our Input Text into SHA256 Hash.
SHA256 encoding comes into the scene when you talk about the security. Security can be of anything like it can be of your passwords, session keys or any other data.
SHA-256 stands for Secure Hash Algorithm – 256 bit and is a type of hash function commonly used in Blockchain. A hash function is a type of mathematical function which turns data into a fingerprint of that data called a hash. It’s like a formula or algorithm which takes the input data and turns it into an output of a fixed length, which represents the fingerprint of the data.
How to Generate SHA256 Encoded Hash?
sha256(this.state.text).then(hash => {
console.log(hash)
});
To Make a React Native App
Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react-native init to make our React Native App. Assuming that you have node installed, you can use npm to install the react-native-cli
command line utility. Open the terminal and go to the workspace and run
npm install -g react-native-cli
Run the following commands to create a new React Native project
react-native init ProjectName
If you want to start a new project with a specific React Native version, you can use the --version argument:
react-native init ProjectName --version X.XX.X
react-native init ProjectName --version react-native@next
This will make a project structure with an index file named App.js in your project directory.
Installation of Dependency
To use sha256
we have to install react-native-sha256
dependency. To install this open the terminal and jump into your project using
cd ProjectName
Run the following command
npm install react-native-sha256 --save
This command will copy all the dependencies into your node_module directory. –save is optional, it is just to update the react-native-sha256 dependency in your package.json file.
CocoaPods Installation
After the updation of React Native 0.60, they have introduced autolinking so we do not require to link the library but need to install pods. So to install pods use
cd ios && pod install && cd ..
Code to Generate SHA256 Encoded Hash
Now Open App.js in any code editor and replace the code with the following code
App.js
// Generate SHA256 Encoded Hash in React Native
// https://aboutreact.com/generate-sha256-encoded-hash-in-react-native/
// import React in our code
import React, {useState} from 'react';
// import all the components we are going to use
import {
SafeAreaView,
Text,
View,
StyleSheet,
TextInput,
TouchableOpacity,
} from 'react-native';
import {sha256} from 'react-native-sha256';
const App = () => {
const [inputText, setInputText] = useState('');
const [text, setText] = useState('');
const convertSHA = () => {
//Encode SHA256
sha256(inputText).then((hash) => {
setText(hash);
});
};
return (
<SafeAreaView style={{flex: 1}}>
<View style={styles.container}>
<Text style={styles.titleStyle}>
Generate SHA256 Encoded Hash in React Native
</Text>
<Text style={styles.textStyle}>{text}</Text>
<Text style={styles.textStyle}>
Please insert any value to convert in SHA 256
</Text>
<TextInput
style={styles.textInputStyle}
onChangeText={
(inputText) => setInputText(inputText)
}
placeholder="Enter Any Value"
value={inputText}
/>
<TouchableOpacity
style={styles.buttonStyle}
onPress={convertSHA}
>
<Text style={styles.buttonTextStyle}>
Conver to SHA 256
</Text>
</TouchableOpacity>
</View>
</SafeAreaView>
);
};
export default App;
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: 'white',
justifyContent: 'center',
padding: 10,
},
titleStyle: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
textStyle: {
textAlign: 'center',
margin: 10,
},
textInputStyle: {
flexDirection: 'row',
height: 40,
marginTop: 20,
marginLeft: 35,
marginRight: 35,
margin: 10,
},
buttonStyle: {
backgroundColor: '#51D8C7',
borderWidth: 0,
color: '#FFFFFF',
borderColor: '#51D8C7',
height: 40,
alignItems: 'center',
borderRadius: 5,
marginLeft: 35,
marginRight: 35,
marginTop: 30,
},
buttonTextStyle: {
color: '#FFFFFF',
paddingVertical: 10,
fontSize: 16,
},
});
To Run the React Native App
Open the terminal again and jump into your project using.
cd ProjectName
To run the project on an Android Virtual Device or on real debugging device
react-native run-android
or on the iOS Simulator by running (macOS only)
react-native run-ios
Output Screenshots
This is how you can Generate SHA256 Encoded Hash in React Native. If you have any doubts or you want to share something about the topic you can comment below or contact us here. There will be more posts coming soon. Stay tuned!
Hope you liked it. 🙂
i am getting this error, looking for help
“Cannot read property ‘sha256’ of undefined “
Post updated please try now