Werkzeug security hashes in go

main.go

// This isn't a full blown module, just copy the imports and copy the functions to use. Code is self explanatory.

import (
    "encoding/hex"
    "fmt"
    "strings"
    "math/rand"

    "golang.org/x/crypto/scrypt"
)

const SALT_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

func genSalt(length int) string {
    if length <= 0 {
        panic("Salt length must be at least 1.")
    }

    salt := make([]byte, length)
    for i := range salt {
        salt[i] = SALT_CHARS[rand.Intn(len(SALT_CHARS))]
    }
    return string(salt)
}

func hash(password, salt string) string {
    passwordBytes := []byte(password)
    saltBytes := []byte(salt)

    if salt == "" {
        salt = genSalt(16) // You can adjust the length of the salt as needed
    }

    derivedKey, _ := scrypt.Key(passwordBytes, saltBytes, 32768, 8, 1, 64)

    hashString := fmt.Sprintf("scrypt:32768:8:1$%s$%s", salt, hex.EncodeToString(derivedKey))
    return hashString
}

func verifyHash(werkzeughash, password string) (bool) {
    parts := strings.Split(werkzeughash, "$")
    if len(parts) != 3 || parts[0] != "scrypt:32768:8:1" {
        return false, fmt.Errorf("invalid hash format", len(parts), parts[0], werkzeughash)
    }
    salt := parts[1]

    computedHash := hash(password, salt)

    fmt.Println(werkzeughash, "\n", computedHash)

    return werkzeughash == computedHash, nil
}

No license, feel free to just copy-paste, relicense, etc.