How to compare two hashed values for equality in Go?

In Go, you can compare two hashed values for equality by using the crypto/subtle package, which provides constant-time operations useful for cryptographic operations.

Here's an example code that shows how to compare two hashed values for equality using the crypto/subtle package:

package main

import (
	"crypto/subtle"
	"fmt"
)

func main() {
	hashedValue1 := []byte("hashed value 1")
	hashedValue2 := []byte("hashed value 2")

	isEqual := subtle.ConstantTimeCompare(hashedValue1, hashedValue2) == 1

	if isEqual {
		fmt.Println("The hashed values are equal")
	} else {
		fmt.Println("The hashed values are not equal")
	}
}

In this example, we compare hashedValue1 and hashedValue2 using the subtle.ConstantTimeCompare function. If the return value of ConstantTimeCompare is 1, then the hashed values are equal. If the return value is 0, then the hashed values are not equal.

Note that it's crucial to use a constant-time comparison function like ConstantTimeCompare when comparing hashed values to avoid leaking any information through timing attacks.