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package hotline
import (
"encoding/binary"
"fmt"
"golang.org/x/crypto/bcrypt"
"io"
"slices"
)
const GuestAccount = "guest" // default account used when no login is provided for a connection
type Account struct {
Login string `yaml:"Login"`
Name string `yaml:"Name"`
Password string `yaml:"Password"`
Access AccessBitmap `yaml:"Access"`
FileRoot string `yaml:"FileRoot"`
readOffset int // Internal offset to track read progress
}
func NewAccount(login, name, password string, access AccessBitmap) *Account {
return &Account{
Login: login,
Name: name,
Password: HashAndSalt([]byte(password)),
Access: access,
}
}
// Read implements io.Reader interface for Account
func (a *Account) Read(p []byte) (int, error) {
fields := []Field{
NewField(FieldUserName, []byte(a.Name)),
NewField(FieldUserLogin, EncodeString([]byte(a.Login))),
NewField(FieldUserAccess, a.Access[:]),
}
if bcrypt.CompareHashAndPassword([]byte(a.Password), []byte("")) != nil {
fields = append(fields, NewField(FieldUserPassword, []byte("x")))
}
fieldCount := make([]byte, 2)
binary.BigEndian.PutUint16(fieldCount, uint16(len(fields)))
var fieldBytes []byte
for _, field := range fields {
b, err := io.ReadAll(&field)
if err != nil {
return 0, fmt.Errorf("error reading field: %w", err)
}
fieldBytes = append(fieldBytes, b...)
}
buf := slices.Concat(fieldCount, fieldBytes)
if a.readOffset >= len(buf) {
return 0, io.EOF // All bytes have been read
}
n := copy(p, buf[a.readOffset:])
a.readOffset += n
return n, nil
}
// HashAndSalt generates a password hash from a users obfuscated plaintext password
func HashAndSalt(pwd []byte) string {
hash, _ := bcrypt.GenerateFromPassword(pwd, bcrypt.MinCost)
return string(hash)
}
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