website/pkg/encryption/encryption.go

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// Package encryption provides functions to encode/decode AES encrypted secrets.
//
// Encryption is used to store sensitive information in the database, such as 2FA TOTP secrets
// for users who have 2FA authentication enabled.
//
// For new key generation, see pkg/config/variable.go#NewAESKey.
package encryption
import (
"crypto/sha256"
"errors"
"fmt"
"code.nonshy.com/nonshy/website/pkg/config"
"code.nonshy.com/nonshy/website/pkg/encryption/keygen"
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)
// Encrypt a byte stream using the site's AES passphrase.
func Encrypt(input []byte) ([]byte, error) {
if len(config.Current.Encryption.AESKey) == 0 {
return nil, errors.New("AES key not configured")
}
return keygen.EncryptWithAESKey(input, config.Current.Encryption.AESKey)
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}
// EncryptString encrypts a string value and returns the cipher text.
func EncryptString(input string) ([]byte, error) {
return Encrypt([]byte(input))
}
// Decrypt a byte stream using the site's AES passphrase.
func Decrypt(data []byte) ([]byte, error) {
if len(config.Current.Encryption.AESKey) == 0 {
return nil, errors.New("AES key not configured")
}
return keygen.DecryptWithAESKey(data, config.Current.Encryption.AESKey)
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}
// DecryptString decrypts a string value from ciphertext.
func DecryptString(data []byte) (string, error) {
decoded, err := Decrypt(data)
if err != nil {
return "", err
}
return string(decoded), nil
}
// Hash a byte array as SHA256 and returns the hex string.
func Hash(input []byte) string {
h := sha256.New()
h.Write(input)
return fmt.Sprintf("%x", h.Sum(nil))
}
// VerifyHash hashes a byte array and checks the result.
func VerifyHash(input []byte, expect string) bool {
return Hash(input) == expect
}