Multi tool use

Why does my crypt package give me invalid magic prefix error?

I have the following code:

import "github.com/kless/osutil/user/crypt/sha512_crypt"
c := sha512_crypt.New()
hash, err := c.Generate(byte("enter-new-password"), byte("$2a$09$f5561d2634fb28a969f2dO8QeQ70f4bjCnF/.GvPpjj.8jgmtzZP2"))
if err != nil {
panic(err)
}


And it produced the following error

http: panic serving 192.168.0.16:56730: invalid magic prefix

Why does this happen and how do I resolve it?

1 Answer
1

Why does this happen and how do I resolve it?

You have an invalid magic prefix.

github.com/tredoe/osutil/user/crypt/sha512_crypt/sha512_crypt.go

if !bytes.HasPrefix(salt, c.Salt.MagicPrefix) {
return "", common.ErrSaltPrefix
}


Read the crypt package code.

PHP: crypt — One-way string
hashing

PHP: password_hash — Creates a password hash

Read the PHP documentation.

See your earlier question: golang equivalent of PHP crypt().

Provide a valid magic prefix.

For example,

package main

import (
"fmt"

"github.com/kless/osutil/user/crypt/sha512_crypt"
)

func main() {
c := sha512_crypt.New()
magic := sha512_crypt.MagicPrefix
hash, err := c.Generate(
byte("enter-new-password"),
byte(magic+"$2a$09$f5561d2634fb28a969f2dO8QeQ70f4bjCnF/.GvPpjj.8jgmtzZP2"),
)
if err != nil {
panic(err)
}
fmt.Println(hash)
}


Output:

$6$$.AVE44JRnLFr9TZx3zASJX6V3Uu0jpnrOV6fW1T5NHy3MUKPaJXHGvjooxrAkYsuIL2HwS/sYgzUZ.cg8FTtz/


NOTE:

import "github.com/kless/osutil/user/crypt/sha512_crypt"


is now an alias for the new location

import "github.com/tredoe/osutil/user/crypt/sha512_crypt"


$2a$09$f5561d2634fb28a969f2dO8QeQ70f4bjCnF/.GvPpjj.8jgmtzZP2

$2a$

import "golang.org/x/crypto/bcrypt"

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.