How do I implement bcrypt in Go?

How do I implement bcrypt in Go?

To implement bcrypt in Go, you can use the 'golang.org/x/crypto/bcrypt' package. First, install it using 'go get'. Then, you can hash passwords using 'bcrypt.GenerateFromPassword' and compare them with 'bcrypt.CompareHashAndPassword'.

Can you show me a code example?

Sure! Here's a simple example:

package main

import (
    "fmt"
    "golang.org/x/crypto/bcrypt"
)

func main() {
    password := "mySecretPassword"
    // Hashing the password
    hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
    if err != nil {
        fmt.Println(err)
    }
    fmt.Println("Hashed Password:", string(hashedPassword))

    // Comparing the password
    err = bcrypt.CompareHashAndPassword(hashedPassword, []byte(password))
    if err != nil {
        fmt.Println("Password does not match")
    } else {
        fmt.Println("Password matches")
    }
}

This code hashes a password and then verifies it.

What is the cost parameter in bcrypt?

The cost parameter in bcrypt determines the computational complexity of the hashing process. A higher cost means more time and resources are required to hash the password, making it more secure but also slower. The default cost is 10.

Are there any security considerations I should be aware of?

Yes, always use a strong and unique salt for each password, avoid using a low cost factor, and ensure your application is protected against timing attacks.