What is crypto in golang ?

The crypto package in Golang provides a set of cryptographic primitives, such as hash functions, encryption and decryption algorithms, and digital signature algorithms. These primitives are designed to be used in a secure manner and to implement secure protocols, such as TLS (Transport Layer Security). The crypto package provides a convenient and easy-to-use way to perform cryptographic operations in Golang programs.

Here's an example of using the crypto/sha256 package to compute the SHA-256 hash of a string:

package main

import (

"crypto/sha256"

"fmt"

)

func main() {

data := []byte("hello, world")

hash := sha256.Sum256(data)

fmt.Printf("%x\n", hash)

}

In this example, we import the crypto/sha256 package to access the SHA-256 hash function. We create a byte slice containing the message "hello, world", and pass it to the sha256.Sum256 function to compute its hash. The result is a 32-byte hash value, which we print in hexadecimal format using the %x format specifier.