The Secure Hash Algorithm (SHA) family is a set of cryptographic hash functions published by the National Institute of Standards and Technology (NIST). These algorithms take input data and produce a fixed-size hash value (digest) that represents the original data. SHA algorithms are widely used for data integrity verification, digital signatures, and security applications.

JavaScript Web Crypto API​

JavaScript Web Crypto API supports SHA-1 SHA-256 SHA-384 SHA-512

// convert to hex text
const bufferToHex = (buffer) => {
	const byteArray = new Uint8Array(buffer);
	return Array.from(byteArray)
	  .map(byte => byte.toString(16).padStart(2, '0'))
	  .join('');
};

const textInput = "hello";
const encoder = new TextEncoder();
const data = encoder.encode(textInput);

// Web Crypto API supports SHA-1 SHA-256 SHA-384 SHA-512
const hashAlgorithm = "SHA-256"; 
const hashBuffer = crypto.subtle.digest(hashAlgorithm, data);
const hashHex = bufferToHex(hashBuffer);

Alice and Bob care about their privacy and want to encrypt their communication using AES encryption.

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